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Antioxidant compounds and capacities of Gac (Momordica cochinchinensis Spreng) fruits
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作者 Ali Abdulqader Faisal Ali +1 位作者 Amin Ismail Norhaizan Mohd Esa 《亚太热带生物医学杂志:英文版》 CAS 2019年第4期158-167,共10页
Objective: To identify and determine the composition of antioxidant compounds, and to evaluate the antioxidant abilities of Gac fruit parts(peel, pulp, seed and aril) grown in Malaysia. Methods: LC-MS/MS was used for ... Objective: To identify and determine the composition of antioxidant compounds, and to evaluate the antioxidant abilities of Gac fruit parts(peel, pulp, seed and aril) grown in Malaysia. Methods: LC-MS/MS was used for identification of antioxidant compounds and UV-Vis for estimation of the contents of phenolics, flavonoids, and carotenoids. Lycopene and β-carotene were quantified using high-performance liquid chromatography. DPPH(2, 2-diphenyl-1-picrylhydrazyl) and ferric reducing antioxidant power assays were employed to evaluate antioxidant capacities. Results: Phytochemicals were found amongst all the fruit parts. Notably, significant amounts of carotenoids [(107.4 ± 4.5),(85.7 ± 4.4),(110.6 ± 2.1) mg/100 g dry weight(DW)], and relatively high levels of both phenolics [(27.3 ± 1.7),(28.9 ± 2.4),(30.8 ± 2.7) mg/100 g DW] and flavonoids [(38.1 ± 2.2),(8.8 ± 1.3),(24.5 ± 3.3) mg/100 g DW] were found in the fruit’s peel, pulp and aril, respectively. Seed part also showed a relatively high level of flavonoids ((18.1 ± 2.3) mg/100 g DW)Lycopene and β-carotene were found to be significantly high(P < 0.05) in aril [(579.3 ± 22.7) and(621.0 ± 35.0) μg/g DW], followed by peel [(51.0 ± 7.5) and(210.0 ± 12.5) μg/g DW] and pulp ((37.6 ± 10.9) and(205.6 ± 22.1) μg/g DW))Antioxidant assays revealed that aril possessed the highest scavenging activity(IC50 = 865 μg/mL), while the peel possessed the highest ferric reducing power of 140 μmol FeSO4/μg. Conclusions: The current results demonstrate that Gac fruit grown in Malaysia is a rich source of phytochemicals, especially carotenoids, and possesses antioxidant activities. Thus, such findings suggest Gac fruit as a source of an antioxidant plant. 展开更多
关键词 Momordica cochinchinensis PHYTOCHEMICALS Carotenoids ANTIOXIDANTS POLYPHENOLS HIGH-PERFORMANCE liquid chromatography
Resistance status of main malaria vector, Liston (Diptera:Culicidae) to insecticides in a malaria Endemic Area,Southern Iran
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作者 Madineh Abbasi Ahmad Ali Hanafi-Bojd +8 位作者 Mohammad Reza Yaghoobi-Ershadi Hassan Vatandoost Mohammad Ali Oshaghi Teimour Hazratian Mohammad Mehdi Sedaghat Sajjad Fekri Reza Safari Abdol Rasoul Mojahedi Yousef Salari 《亚太热带医药杂志:英文版》 SCIE CAS 2019年第1期43-48,共6页
Objective: To evaluate the susceptibility of Anopheles stephensi(An. stephensi) Liston, the main malaria vector in southern Iran, to WHO recommended insecticides. Methods: Larvae of An. stephensi were collected from t... Objective: To evaluate the susceptibility of Anopheles stephensi(An. stephensi) Liston, the main malaria vector in southern Iran, to WHO recommended insecticides. Methods: Larvae of An. stephensi were collected from three different larval habitats in both urban and rural area of Bandar Abbas city and one rural area in Rudan county southern Iran. WHO standard method was used for evaluation of adult and larval mosquito susceptibility. Bendiocarb, permethrin, lambda-cyhalothrin, deltamethrin as insecticide and temephos and chlorpyriphos as larvicide were used at the diagnostic dosages recommended by WHO. Results: Findings of this study showed all larval populations of An. stephensi were completely susceptible to temephos and candidate for resistance to chlorpyriphos. Adult mosquitoes in rural areas of Bandar Abbas city were resistant to pyrethroid and carbamate insecticides. Conclusion: Comparison of the results of this survey with previous studies indicates that the resistance to pyrethroids and carbamates in this malaria endemic region is increasing. Wide use of pesticides in agriculture is certainly effective in increasing resistance. The inter-sectoral coordination and collaboration in health and agriculture seem to be necessary to manage insecticide resistance in malaria vectors. 展开更多
关键词 ANOPHELES STEPHENSI Insecticide RESISTANCE PYRETHROIDS CARBAMATES
1-(对甲苯基)-2-(三对甲苯基-5-亚磷酰基)乙醛的汞(Ⅱ)配合物的X射线晶体学、光谱表征和理论计算研究 预览
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作者 Mahsa Pourmirza Shahla Ebrahimnezhad +3 位作者 Ali Ramazani Aidin Bahrami Sholeh.Alaei Ali.Reza Dadrass 《无机化学学报》 SCIE CAS CSCD 北大核心 2019年第2期344-350,共7页
通过2-溴-1-(对甲苯基)乙醛与三(对甲苯基)膦的反应制备α-磷配体:1-(对甲苯基)-2-(三对甲苯基-5-亚磷酰基)乙醛(L)。氯化镉和溴化汞与L分别反应,生成配合物[Cd(L)Cl2]2(C1)和[Hg(L)(μ2-Br)Br]2(C2)。用IR和NMR(1H,13C,31P)对配合物进... 通过2-溴-1-(对甲苯基)乙醛与三(对甲苯基)膦的反应制备α-磷配体:1-(对甲苯基)-2-(三对甲苯基-5-亚磷酰基)乙醛(L)。氯化镉和溴化汞与L分别反应,生成配合物[Cd(L)Cl2]2(C1)和[Hg(L)(μ2-Br)Br]2(C2)。用IR和NMR(1H,13C,31P)对配合物进行了表征。通过单晶X射线衍射测定了C2的结构,并在B3LYP/6-31G^*水平对C2的结构进行了DFT计算研究,以揭示C2的复合反应位点与Schiff碱等亲核基团的相互作用。 展开更多
关键词 磷配体 汞髤配合物 三(对甲苯基)膦
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Multimodal imaging in photic retinopathy
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作者 Seyed Ali Tabatabaei Mohammad Soleimani +3 位作者 Bahram Bohrani Ali Banafsheafshan Shahin Faghihi Houshang Faghihi 《国际眼科杂志:英文版》 SCIE CAS 2019年第3期523-525,共3页
Dear Editor,We would like to present the importance of multimodal imaginginphoticretinopathyinacaseofphotic retinopathy.A young man presented with a one-day history of left central scotoma and metamorphopsia after exp... Dear Editor,We would like to present the importance of multimodal imaginginphoticretinopathyinacaseofphotic retinopathy.A young man presented with a one-day history of left central scotoma and metamorphopsia after exposure toahandheldlaserpointerbeamduringanightparty.The laser pointer was a class IIIB green laser with a wavelength of532±10nmandmaximalpower<1000mW.However. 展开更多
关键词 MULTIMODAL IMAGING in PHOTIC RETINOPATHY FIGURE
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Spatial variability of soil microbial indices in common alder COMMON ALDER(Alnus glutinosa)stands using a geostatistical approach in northern Iran 预览
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作者 Neda Ghorbanzadeh Ali Salehi +2 位作者 Hassan Pourbabaei Ali Ashraf Soltani Tolarod Seyed Jalil Alavi 《林业研究:英文版》 CAS CSCD 2019年第2期679-688,共10页
Microbial indices and their spatial patterns are strongly affected by environmental factors.Spatial variability of soil properties is one of the most important causes of variability in soil microbial indices.This rese... Microbial indices and their spatial patterns are strongly affected by environmental factors.Spatial variability of soil properties is one of the most important causes of variability in soil microbial indices.This research was conducted in the Caspian forest to assess spatial variabilities and frequency distributions of microbial properties.Ninety soil samples were taken using a grid sampling design 40×40 m.Microbial indices,organic carbon,nitrogen and pH were determined.Soil variable distributions showed that microbial indices had abnormal distributions.Logarithmic transformation produced normal distribution.Spatial continuity using geostatistical(variogram)was studied and maps obtained by point kriging.The variograms revealed the presence of spatial autocorrelation.The results indicate that spatial dependence of soil microbial indices was affected by non-intrinsic factors and forest management procedures.The maps show that soil microbial indices and soil properties have spatial variability.The spatial pattern of microbial indices was correlated to organic carbon and nitrogen. 展开更多
关键词 Variograms Soil MICROBIAL indices Spatial distribution Natural FOREST Iran
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A Late Cretaceous ensimatic arc developed during closure of the northern branch of Neo-Tethys (central-northern Turkey) 预览
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作者 Metin Beyazpirinc Ali Ekber Akcay +1 位作者 Ali Yilmaz Meftun Kerem Sonmez 《地学前缘:英文版》 CAS CSCD 2019年第3期1015-1028,共14页
Studies on differentiation of ensimatic arc units from melange units in the Northern Anatolian Ophiolitic Belt (NAOB) are very rare. The study area represents the southern edge of the central part of the NAOB. The aim... Studies on differentiation of ensimatic arc units from melange units in the Northern Anatolian Ophiolitic Belt (NAOB) are very rare. The study area represents the southern edge of the central part of the NAOB. The aim of the study is to distinguish the main units of NAOB and to define the geotectonic setting of the Darmik Ensimatic Arc Association (DEAA). To study the ensimatic arc units as an independent tectonic unit is important and facilitates understanding of the geological evolution of the NAOB. During field studies, the contact relationships within the Darmik Ensimatic Arc Association (DEAA) units and also with other tectonic units were reviewed. Then, paleontological, geochronological, petrological and also geochemical properties of the DEAA have been defined. In the present study, ensimatic arc units have been distinguished from ophiolitic association for the first time, in the region. As a result of the study, the DEAA is divided into two levels and lower level named as the Kartal unit and upper level named as the izibüyük unit. In the Kartal unit, basaltic and andesitic lavas with their equivalent pyroclastic rock units are dominant. Radiolarite and mudstones interbedded within the Kartal unit of DEAA have Turonian and Santonian age. In addition, the age of basalt samples of DEAA are 98.7 ± 2.4 Ma, defined using the ^40Ar/^39Ar method. The izibüyük unit of DEAA comprises conglomerate, sandstone, claystone, mudstone, clayey limestone, micritic limestone with volcanic interbeds and also calciturbidites. Santonian eMaastrichtian ages were obtained from this unit of the DEAA. In conclusion, the age of DEAA is widely accepted as Late Cretaceous. After the evaluation of the analysis, the volcanics of the DEAA originated from calcalkaline-basalts, which reflect ensimatic arc magmatism. 展开更多
关键词 North Anatolian Ophiolitic Belt Double SUBDUCTION ZONES Darmik ensimatic ARC TURKEY
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Histologic features and genomic alterations of primary colorectal adenocarcinoma predict growth patterns of liver metastasis 预览
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作者 Jing-Bo Wu Ali Lopez Sarmiento +4 位作者 Pierre-Olivier Fiset Anthula Lazaris Peter Metrakos Stephanie Petrillo Zu-Hua Gao 《世界胃肠病学杂志:英文版》 SCIE CAS 2019年第26期3408-3425,共18页
BACKGROUND Different histological growth patterns(HGPs)of colorectal carcinoma(CRC)liver metastasis are associated with patients’prognosis and response to antiangiogenic therapy.However,the relationship between HGPs ... BACKGROUND Different histological growth patterns(HGPs)of colorectal carcinoma(CRC)liver metastasis are associated with patients’prognosis and response to antiangiogenic therapy.However,the relationship between HGPs of liver metastasis and clinicopathological and genomic characteristics of primary cancer has not been well established.AIM To assess whether certain clinicopathological and genomic features of primary CRC could predict the HGPs of liver metastasis.METHODS A total of 29 patients with paired resections of both primary CRC and liver metastasis were divided into two groups:A(15 cases with desmoplastic liver metastasis)and B(14 cases with replacement liver metastasis).Clinical information was obtained from patients’charts.Mismatch repair proteins,BRAFV600E,and PD-L1 were evaluated by immunohistochemistry.Five cases were selected randomly from each group for whole exome sequencing(WES)analysis.RESULTS In the primary tumor,expanding growth pattern,low tumor budding score(TBS),and Crohn’s disease-like response(CDR)were associated with desmoplastic liver metastasis and better overall survival,whereas infiltrating growth pattern alone of primary carcinoma could predict the replacement liver metastasis and worse overall survival(P<0.05).On WES analysis,primary carcinoma with desmoplastic liver metastasis showed mutations in APC(4/5);TP53(3/5);KRAS,PIK3CA,and FAT4(2/5);BRCA-1,BRCA2,BRAF,and DNAH5(1/5),whereas primary carcinoma with replacement liver metastasis showed mutations in APC and TP53(3/5);KRAS,FAT4,DNH5,SMAD,ERBB2,ERBB3,LRP1,and SDK1(1/5).CONCLUSION The HGPs,TBS,and CDR of primary CRC as well as the presence of specific genetic mutations such as those in PIK3CA could be used to predict the HGPs of liver metastasis,response to therapy,and patients’prognosis. 展开更多
关键词 Colorectal carcinoma Liver metastasis HISTOLOGIC growth pattern CLINICOPATHOLOGICAL characteristics WHOLE EXOME SEQUENCING
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Review of sustainability, pretreatment, and engineering considerations of asphalt modifiers from the industrial solid wastes
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作者 Mohd Rosli Mohd Hasan J-Wei Chew +2 位作者 Ali Jamshidi Xu Yang Meor Othman Hamzah 《交通运输工程学报(英文版)》 CSCD 2019年第3期209-244,共36页
The escalating mass of solid waste at an overwhelming sum requires a global attention to strive for efficient waste management and to outsource the ecological treatments. The asphalt pavement industry that consumes a ... The escalating mass of solid waste at an overwhelming sum requires a global attention to strive for efficient waste management and to outsource the ecological treatments. The asphalt pavement industry that consumes a vast scale of natural resources while contributing to thermal and greenhouse emissions is viewed as a high potential alternative for the application of solid waste as asphalt modifier and substantial waste reduction. In efforts to urge for cleaner and greener asphalt production, a growing trend towards usage of solid waste as a renewable material is paving a sustainable future for the asphalt pavement industry. The economic options of incorporating solid waste into the asphaltic mixture coupled with proven effective performances are a green and cost-effective alternative to mitigate various pavement distresses. Various options either as coarse or fine aggregates and as fillers in powder, ash, or fibre form are to stimulate further research interest to incorporate a diversified range of solid waste into the asphalt binder and asphalt mixture. Prior to incorporating solid waste into the asphaltic mixture through the selected options, prerequisite tests in addressing engineering limitations due to the unknown properties of solid waste are reviewed. The concerns on environmental impact are given heavy metals leaching possibilities into water sources are addressed by Toxicity Characterization Leaching Procedure test, to leverage further the systematic reuse of solid waste in steering towards the cleaner production of the asphalt mixture. The microcosmic traits of solid waste namely surface morphology, mineralogical composition and chemical composition are summarized based on the usage of Scanning Electron Microscope, X-Ray Diffraction, and X-Ray Fluorescence, respectively. This systematic review is an enactment and stimulus for researchers to have a general overview before incorporating solid waste into asphalt mixture. 展开更多
关键词 ASPHALT MODIFIER Waste materials CLEAN production Energy Carbon FOOTPRINT Green PAVEMENT
A Civil Engineering Senior Design Research Effort to Ascertain Discharge Coefficients of Different Orifice Geometries 预览
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作者 Abdalla Alajmi Sayed Sayed Ali +6 位作者 Mohammad Alkhudhari Jumana Alqaffas Zack Carrasco Jocelyn Payan Martin Pasamba Tadeh Zirakian David Boyajian 《土木工程与建筑:英文版》 2019年第3期204-208,共5页
The present researched topic was conceived from a senior design course for Civil Engineering students at CSUN (California State University), Northridge. In this work, experimental trials were performed and compared to... The present researched topic was conceived from a senior design course for Civil Engineering students at CSUN (California State University), Northridge. In this work, experimental trials were performed and compared to establish theoretical values of the discharge coefficient. The discharge coefficient is a dimensionless number used to characterize the flow and pressure loss behavior of nozzles and orifices in fluid systems. A group of low-income undergraduate students with diverse backgrounds designed multiple 3D printed orifices where each 3D printed orifice had a specific shape. Utilizing the methods of technical problem solving, the undergraduates found experimental discharge coefficient values for the following orifices: borda, short-tubed, and sharp-edged. Implementing ethics of engineering practice and utilizing university resources, this study is a representation of the collaborative work of minorities and females that want to expand their knowledge within their respective discipline of Civil Engineering. 展开更多
关键词 Education ORIFICE 3D-printing theory test
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Analysis of a Hydraulic Pipe System with Major and Minor Pressure Losses 预览
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作者 Mohammad Alesmaeel Ali Alfarsi +5 位作者 Safaa Almusa Emilio Diaz Souren Grigoryan Joao Queda Tadeh Zirakian David Boyajian 《土木工程与建筑:英文版》 2019年第3期209-217,共9页
Bernoulli’s principle states that an increase in the speed of a fluid is directly related to the decrease in the fluid’s potential energy. Many engineers refer to Bernoulli’s equations to calculate the pressure of ... Bernoulli’s principle states that an increase in the speed of a fluid is directly related to the decrease in the fluid’s potential energy. Many engineers refer to Bernoulli’s equations to calculate the pressure of a system. The objective of this undergraduate research endeavor is to illustrate the accuracy of his theory and apply it to one of the most common fluid systems in residential homes, a pump pipe system. The research team consisted of a diverse body of undergraduate students with different educational and cultural backgrounds. Completing this objective further improved every member’s problem solving, communication skills, self-confidence, ability to rationalize and transcribe physical phenomena as well visually express them to rest of the engineering community. The findings of this research showed a relationship between various parameters such as, pipe length, pipe roughness, diameter, and specific gravity of the liquid. 展开更多
关键词 Bernoulli's EQUATION pipe flow hydraulics EDUCATIONAL model engineering CREATIVITY
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Calculation of dpa rate in graphite box of Tehran Research Reactor (TRR) 预览
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作者 Mohamad Amin Amirkhani Mohsen Asadi Asadabad +2 位作者 Mostafa Hassanzadeh Seyed Mohammad Mirvakili Ali Mohammadi 《核技术:英文版》 SCIE CAS CSCD 2019年第6期44-56,共13页
Radiation damage is an important factor that must be considered while designing nuclear facilities and nuclear materials. In this study, radiation damage is investigated in graphite, which is used as a neutron reflect... Radiation damage is an important factor that must be considered while designing nuclear facilities and nuclear materials. In this study, radiation damage is investigated in graphite, which is used as a neutron reflector in the Tehran Research Reactor (TRR) core. Radiation damage is shown by displacement per atom (dpa) unit. A cross section of the material was created by using the SPECOMP code. The concentration of impurities present in the non-irradiated graphite was measured by using the ICP-AES method. In the present study the MCNPX code had identified the most sensitive location for radiation damage inside the reactor core. Subsequently, the radiation damage (spectral-averaged dpa values) in the aforementioned location was calculated by using the SPECTER, SRIM Monte Carlo codes, and Norgett, Robinson and Torrens (NRT) model. The results of “Ion Distribution and Quick Calculation of Damage”(QD) method groups had a minor difference with the results of the SPECTER code and NRT model. The maximum radiation damage rate calculated for the graphite present in the TRR core was 1.567 9 10^-8 dpa/s. Finally, hydrogen retention was calculated as a function of the irradiation time. 展开更多
关键词 Radiation damage GRAPHITE SPECTER SRIM MCNPX TEHRAN Research Reactor
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Developing green super rice varieties with high nutrient use efficiency by phenotypic selection under varied nutrient conditions 预览
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作者 Zilhas Ahmed Jewel Jauhar Ali +5 位作者 Yunlong Pang Anumalla Mahender Bart Acero Jose Hernandez Jianlong Xu Zhikang Li 《作物学报:英文版》 CAS CSCD 2019年第3期368-377,共10页
The development of green super rice varieties with improved nutrient use efficiency(NuUE)is a vital target area to increase yield and make it more stable under rainfed conditions.In the present study, we followed an e... The development of green super rice varieties with improved nutrient use efficiency(NuUE)is a vital target area to increase yield and make it more stable under rainfed conditions.In the present study, we followed an early backcross(BC) breeding approach by using a highyielding and widely adapted Xian variety, Weed Tolerant Rice 1(WTR-1), as a recipient and a Geng variety, Hao-An-Nong(HAN), as a donor.Starting from the BC1F2 generation, the BC population went through one generation of selection under irrigated, low-input, and rainfed conditions, followed by four consecutive generations of screening and selection for high grain yield(GY) under six different nutrient conditions(NPK, 75 N,-N,-P,-NP, and-NPK), leading to the development of 230 BC1F6 introgression lines(ILs).These 230 ILs were evaluated under the same six nutrient conditions for 13 agro-morphological and grain yield component traits in comparison to four checks and parents.Significant trait variations were observed between the treatments and ILs.Positive correlations were identified for GY with biomass, panicle length, flag-leaf area, flag-leaf width, filled grain number per panicle,1000-grain weight, and tiller number under-N,-P,-NP, and-NPK conditions.Out of 230 ILs,12 were identified as promising under two or more nutrient deficiency conditions.The results demonstrated an efficient inter-subspecific BC breeding procedure with a first round of selection under rainfed-drought conditions, followed by four generations of progeny testing for yield performance under six nutrient conditions.The promising ILs can be useful resources for molecular genetic dissection and understanding the physiological mechanisms of NuUE. 展开更多
关键词 NUTRIENT use efficiency GRAIN YIELD NITROGEN PHOSPHORUS Green super rice
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Improved Performance for a Heterogeneous Satellite-Cooperative Network with Best Relay Node Selection 预览
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作者 Pedram hajipour Ali Shahzadi Saeed Ghazi-Maghrebi 《中国通信:英文版》 SCIE CSCD 2019年第5期93-105,共13页
Nowadays, hybrid satellite-terrestrial cooperative network has emerged as a key technology to provide a great variety of communication services. The deployment of this network will improve coverage and capacity in rem... Nowadays, hybrid satellite-terrestrial cooperative network has emerged as a key technology to provide a great variety of communication services. The deployment of this network will improve coverage and capacity in remote areas. Despite the benefits of this network, by increasing the number of users, communication efficiency based on interference management is a major challenge in satellite-based system. Also, the direct links between satellite system and the terrestrial equipment do not always have desirable channel condition. In order to avoid serious throughput degradation, choosing a cooperative relay node is very important. In this paper, Stackelberg game is exploited for interference management that is raised by satellites in down link over terrestrial equipment. Then, for interference management between ground station and relay node with other mobile users, CVX is used to allocate optimum power. Also, the best relay node in this structure is selected based on the harmonic mean function. Thus, the performance of the heterogeneous satellite-cooperative network is investigated based on three benchmarks, namely, successful transmission, energy consumption and outage probability. Finally, the simulation results showed the effect of proposed system model on the performance of next generation satellite networks. 展开更多
关键词 HETEROGENEOUS STACKELBERG game CONVEX optimization RELAY NODE COOPERATIVE communication
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Joint salient object detection and existence prediction
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作者 Huaizu JIANG Ming-Ming CHENG +2 位作者 Shi-Jie LI Ali BORJI Jingdong WANG 《中国计算机科学前沿:英文版》 SCIE EI CSCD 2019年第4期778-788,共11页
Recent advances in supervised salient object detection modeling has resulted in significant performance improvements on benchmark datasets. However, most of the existing salient object detection models assume that at ... Recent advances in supervised salient object detection modeling has resulted in significant performance improvements on benchmark datasets. However, most of the existing salient object detection models assume that at least one salient object exists in the input image. Such an assumption often leads to less appealing saliency maps on the background images with no salient object at all. Therefore, handling those cases can reduce the false positive rate of a model. In this paper, we propose a supervised learning approach for jointly addressing the salient object detection and existence prediction problems. Given a set of background-only images and images with salient objects, as well as their salient object annotations, we adopt the structural SVM framework and formulate the two problems jointly in a single integrated objective function: saliency labels of superpixels are involved in a classification term conditioned on the salient object existence variable, which in turn depends on both global image and regional saliency features and saliency labels assignments. The loss function also considers both image-level and regionlevel mis-classifications. Extensive evaluation on benchmark datasets validate the effectiveness of our proposed joint approach compared to the baseline and state-of-the-art models. 展开更多
关键词 salient object DETECTION EXISTENCE PREDICTION JOINT INFERENCE SALIENCY DETECTION
Sensitivity analysis of using diethanolamine instead of methyldiethanolamine solution for GASCO’S Habshan acid gases removal plant
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作者 Samah Zaki NAJI Ammar Ali ABD 《能源前沿:英文版》 CSCD 2019年第2期317-324,共8页
Sweeting natural gas processes are mainly focused on removing carbon dioxide (CO2) and hydrogen sulfide (H2S). The high-energy requirements and opera-tional limitations make amine absorption process sensitive to any c... Sweeting natural gas processes are mainly focused on removing carbon dioxide (CO2) and hydrogen sulfide (H2S). The high-energy requirements and opera-tional limitations make amine absorption process sensitive to any change in conditions. This paper presented a steady- state simulation using Hysys to reasonably predict removal amounts of carbon dioxide and hydrogen sulfide from natural gas with the diethanolamine (DEA) solvent. The product specifications are taken from the real plant (GASCO5S Habshan) which uses the methyldiethanola-mine (MDEA) solvent, while this simulation uses DEA under the same operation conditions. First, the simulation validation has been checked with the data of the real plant. The results show accurate prediction for CO2 slippage and accepted agreement for H2S content compared with the data of the plant. A parametric analysis has been performed to test all possible parameters that affect the performance of the acid gases removal plant. The effects of operational parameters are examined in terms of carbon dioxide and hydrogen sulfide contents in clean gas and reboiler duty. 展开更多
关键词 ACID gas DIETHANOLAMINE methyldiethanola-mine CARBON dioxide capturing HYSYS simulation
Phase Time for the Tunneling of Ultracold V-Type Atoms Through a Mazer Cavity
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作者 Fazal Badshah Abdul Basit +2 位作者 Hamad Ali Qing He Guo-Qin Ge 《理论物理通讯:英文版》 SCIE CAS CSCD 2019年第5期610-616,共7页
We study the tunneling time of ultracold V-type atoms interacting a high quality microwave cavity. Here atomic coherence is introduced in the system by a strong driving field which couples the two lower states of the ... We study the tunneling time of ultracold V-type atoms interacting a high quality microwave cavity. Here atomic coherence is introduced in the system by a strong driving field which couples the two lower states of the three-level atom. It is found that in the presence of coherence, mazer action or the scattering like nature of the interaction may be examined for extended energies of the incident cold atoms. Our results show that position and amplitudes of the peak values of the phase time(traversal time) may be very effectively controlled by the coherent driving field. Further, here we obtained superclassical values of the phase time corresponding to much higher values of the transmission amplitudes of the tunneling atoms which may be advantageous in the possible experimental realization of the superclassical tunneling time of the traversing cold atoms. In addition, we examine a mirror reflection type symmetry in the phase time curve for a judicious choice of the external driving field. 展开更多
关键词 ULTRACOLD atoms MAZER CAVITY PHASE TIME superclassicality
Epidemiology of inpatient tibia fractures in Singapore -- A single centre experience
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作者 Joshua Decruz Rex Premchand Antony Rex Suheal Ali Khan 《中华创伤杂志:英文版》 CAS CSCD 2019年第2期99-102,共4页
Purpose:There are no previous epidemiological studies to represent the trends of tibia fractures in the urban setting.The purpose of our study was to provide unique epidemiological information on the incidence of tibi... Purpose:There are no previous epidemiological studies to represent the trends of tibia fractures in the urban setting.The purpose of our study was to provide unique epidemiological information on the incidence of tibia fractures requiring admission in the urban population of Singapore.Methods:This is a retrospective review of clinical and radiological records encompassing three years period from 2012 to 2014 in a tertiary hospital in Northern Singapore,which covers an adult population of 550,000.Clinical information included demographics,mechanism of injury,and Gustillo-Anderson classification.Radiological records were evaluated by two of the authors and fractures were classified using the AO classification after consensus was reached.Results:There were 214 cases of tibia fractures with a population incidence of 13 in 100,000.Among the tibia fractures,47% were diaphyseal,43% proximal and 10% distal.Majority of patients were males with a male to female ratio of 3 to 1.The mean age of females was 64 years while that of males was 40 years.The commonest mechanism of injury was road traffic accident,which contributed to 42% of cases,with motorcyclists making up 78% of all road traffic accidents.Compound fractures made up 23% of all fractures,most of which were Gustillo-Anderson type Ⅲ;69% of patients underwent surgical intervention.Conclusion:The incidence of tibia fractures is 13/100,000 with a male-to-female ratio of 3∶1.This incidence is lower than other studies,but the proportion of open fractures were surprisingly high at 23%.Distribution of fractures was unimodal with a peak in younger men and older women.This may signify a component of fragility among tibia fractures,especially proximal and distal fractures,which peaks above the age of 80 years old. 展开更多
关键词 TIBIA FRACTURES EPIDEMIOLOGY Urban
Ballistic impact properties of woven bamboo- woven E-glassunsaturated polyester hybrid composites 预览
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作者 Aidy Ali Rabiatun Adawiyah +7 位作者 Kannan Rassiah Wei Kuan Ng Faiz Arifin Faiz Othman Muhammad Shauqi Hazin M.K. Faidzi M.F. Abdullah M.M.H. Megat Ahmad 《Defence Technology(防务技术)》 CAS CSCD 2019年第3期282-294,共13页
In this study, a laminated woven bamboo/woven E glass/unsaturated polyester composite is developed to combat a ballistic impact from bullet under shooting test. The aim of this study is to understand the fundamental e... In this study, a laminated woven bamboo/woven E glass/unsaturated polyester composite is developed to combat a ballistic impact from bullet under shooting test. The aim of this study is to understand the fundamental effects of the woven bamboo arrangement towards increasing ballistic resistance properties. The work focusses on the ballistic limit test known as NIJ V50, which qualifies materials to be registered for use in combat armor panels. The results show that the composites withstood 482.5 m/s ± 5 limit of bullet velocity, satisfying the NIJ test at level II. The findings give a strong sound basis decision to engineers whether or not green composites are qualified to replace synthetic composites in certain engineering applications. 展开更多
关键词 Woven BAMBOO E glass Hybrid composites BALLISTIC LIMIT VELOCITY Energy ABSORPTION
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The impact of raw material properties and process conditions on the color of a powdered formulated detergent product
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作者 Mohamed S. Manga David Willis +1 位作者 Nurafiqah M. Ali David W. York 《颗粒学报:英文版》 SCIE EI CAS CSCD 2019年第4期35-41,共7页
The appearance of deterge nt powder plays an importa nt role in con sumer perception of powder effectiveness for cleaning applications. In this study, we investigated the influence of numerous formulation and processi... The appearance of deterge nt powder plays an importa nt role in con sumer perception of powder effectiveness for cleaning applications. In this study, we investigated the influence of numerous formulation and processing conditions on product discoloration. Product color was scrutinized using the L*a*b* color space, and in particular, L* and b*. Particle size, the method for introducing the optical brightener, and the raw material grade were very important in con trolling the optical properties of detergent granules. As the particle size decreased, the light reflected to the observer appeared brighter and bluer. This was observed as increased wh让eness from L*= 84.03 with a particle size of >841 μm to L*= 90.59 w让h a particle size of <250 μm. Reducing the level of impurities found in the raw materials by changing the material source also improved color definition. A key finding is that the optical brightener should be applied by spraying and prepared by dispersion rather than dissolution. This improves the distribution within the granules and increases the whiteness when compared with pouring the brightener into the agglomeration vessel. Add让ional spray applications highlighted that brightener on the granule surface influenced whiteness more than embedded brightener. In addition, we report on the effects of the drying temperature and mixer impeller speed on powder color. 展开更多
关键词 DETERGENT POWDER POWDER processing POWDER DISCOLORATION Optical BRIGHTENER Characterization
Numerical storm surge model with higher order finite difference method of lines for the coast of Bangladesh 预览
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作者 Gour Chandra Paul Md. Emran Ali 《海洋学报:英文版》 SCIE CAS CSCD 2019年第6期100-116,共17页
In this study, the method of lines (MOLs) with higher order central difference approximation method coupled with the classical fourth order Runge-Kutta (RK(4,4)) method is used in solving shallow water equations (SWEs... In this study, the method of lines (MOLs) with higher order central difference approximation method coupled with the classical fourth order Runge-Kutta (RK(4,4)) method is used in solving shallow water equations (SWEs) in Cartesian coordinates to foresee water levels associated with a storm accurately along the coast of Bangladesh. In doing so, the partial derivatives of the SWEs with respect to the space variables were discretized with 5-point central difference, as a test case, to obtain a system of ordinary differential equations with time as an independent variable for every spatial grid point, which with initial conditions were solved by the RK(4,4) method. The complex land-sea interface and bottom topographic details were incorporated closely using nested schemes. The coastal and island boundaries were rectangularized through proper stair step representation, and the storing positions of the scalar and momentum variables were specified according to the rules of structured C-grid. A stable tidal regime was made over the model domain considering the effect of the major tidal constituent, M2 along the southern open boundary of the outermost parent scheme. The Meghna River fresh water discharge was taken into account for the inner most child scheme. To take into account the dynamic interaction of tide and surge, the generated tidal regime was introduced as the initial state of the sea, and the surge was then made to come over it through computer simulation. Numerical experiments were performed with the cyclone April 1991 to simulate water levels due to tide, surge, and their interaction at different stations along the coast of Bangladesh. Our computed results were found to compare reasonable well with the limited observed data obtained from Bangladesh Inland Water Transport Authority (BIWTA) and were found to be better in comparison with the results obtained through the regular finite difference method and the 3-point central difference MOLs coupled with the RK(4,4) method with regard to the root mean square er 展开更多
关键词 SHALLOW water equations METHOD of lines higher order finite difference approximation METHOD SURGE nested scheme
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