期刊文献+
共找到84篇文章
< 1 2 5 >
每页显示 20 50 100
Performance Analysis of Cushioned Sport Soles with Plantar Pressure Test 认领
1
作者 李静 于海滨 +2 位作者 崔丽娜 张锐 邱夷平 《东华大学学报:英文版》 EI CAS 2020年第2期108-115,共8页
Plantar pressure distribution of the designed cushioned soles was studied and compared with that of the commercially available sport shoes.A three-dimensional motion measurement system was used to obtain the peak plan... Plantar pressure distribution of the designed cushioned soles was studied and compared with that of the commercially available sport shoes.A three-dimensional motion measurement system was used to obtain the peak plantar force,the peak plantar pressure,force-time integrals and pressure-time integrals,and one-way analysis of variance was used to analyze the performance of the designed cushioned shoes.The results revealed that in normal walking and jogging states,compared with the commercially available sport shoes,the peak plantar pressure in the heel region decreased by 13.65%and 6.05%,respectively.The peak plantar force decreased by 15.98%and 15.32%,respectively.The force-time integral decreased by 4.36%and 6.83%,respectively,and the pressure-time integral decreased by 10.58%and 11.00%,respectively.In conclusion,the cushioning performance of shoes is related to the exercise mode.For normal walking,the designed cushioned soles absorbed greater impact in the heel region,which was effectively cushioned,whereas in the jogging state,the designed cushioned soles exhibited a favorable cushioning effect in the forefoot region.The designed cushioned soles exhibited cushioning performance through the coupling design of material and structure,which effectively reduced impact force when landing and could optimize plantar pressure distribution. 展开更多
关键词 BIONIC structure midsole PLANTAR PRESSURE distribution PEAK PLANTAR
在线阅读 下载PDF
Enhanced visible-light photoelectrochemical performance via chemical vapor deposition of Fe2O3 on a WO3 film to form a heterojunction 认领
2
作者 Yi-Fei Zhang Yu-Kun Zhu +5 位作者 Chun-Xiao Lv Shou-Juan Lai Wen-Jia Xu Jin Sun Yuan-Yuan Sun Dong-Jiang Yang 《稀有金属:英文版》 SCIE EI CAS CSCD 2020年第7期841-849,共9页
A heterojunction photoanode of Fe2O3 loaded on a WO3 film on a fluorine-doped tin oxide substrate(FTO-WO3/Fe2O3)was prepared via a simple hydrothermal and chemical vapor deposition(CVD)growth method.The photoanode sho... A heterojunction photoanode of Fe2O3 loaded on a WO3 film on a fluorine-doped tin oxide substrate(FTO-WO3/Fe2O3)was prepared via a simple hydrothermal and chemical vapor deposition(CVD)growth method.The photoanode showed higher photoelectrochemical(PEC)water-splitting activity than that of the pristine FTO-WO3 under simulated sunlight because of the synergistic effect of Fe2O3 and WO3.The as-synthesized material was characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM),transmission electron microscopy(TEM),and X-ray photoelectron spectroscopy(XPS).The photocurrent density was estimated by linear sweep voltammetry and further confirmed using intensity-modulated photocurrent spectra.Experiments demonstrated that the coated Fe2O3 enhanced the separation and migration efficiencies of the photoinduced electrons and holes,improving the PEC water-splitting properties.The FTO-WO3/Fe2O3 photoanode showed a 1.25 times enhancement in photocurrent density compared with FTO-WO3.This result suggests that facile chemical vapor deposition growth is an effective way to fabricate heterojunctions and improve the properties of WO3 photoanodes for PEC water-splitting applications. 展开更多
关键词 WO3 FE2O3 HETEROJUNCTION Water splitting
Festival Elements: A Source of Inspiration for Contemporary Fashionable Products 认领
3
作者 Solomon Marfo Ayesu Mercy Ampofowah Osei +1 位作者 Cynthia Akua Chichi Richard Acquaye 《纺织科学与技术(英文)》 2020年第4期200-217,共18页
Festivals are intrinsic aspects of the culture of a group of people and allow displaying interesting crafts and elements such as fabrics, symbols, folktales, and paraphernalia. The dynamism in the culture is vast but ... Festivals are intrinsic aspects of the culture of a group of people and allow displaying interesting crafts and elements such as fabrics, symbols, folktales, and paraphernalia. The dynamism in the culture is vast but unexplored as inspiration for the creation of products. This created the need to explore the possibility of designing contemporary print and products from these crafts and elements from two festivals (Aboakyir and Gologo) using Adobe Photoshop in the design process. This phenomenon necessitated the consideration of this project which was undertaken by employing the design-based practice coupled with observation as an instrument. Elements related to the festivals were identified and using the design process, print designs were developed and further simulated on different products. This practice seeks to promote the cultural heritage of the people to a wider populace and the world at large. It is recommended that the Traditional Council should have a museum or gallery for keeping the artworks used in their festivals for archival purposes. 展开更多
关键词 FESTIVALS Cultural Elements Adobe Photoshop Fashionable Products Paraphernalia
在线阅读 免费下载
Importance of incorporating systemic cerebroarterial hemodynamics into computational modeling of blood flow in intracranial aneurysm 认领
4
作者 Zhi-qiang Zhang Li-jian Xu +3 位作者 Rong Liu Xiao-sheng Liu Bing-Zhao Fu-you Liang 《水动力学研究与进展:英文版》 SCIE EI CSCD 2020年第3期510-522,共13页
The importance of properly treating boundary conditions (BCs) in numerical simulation of hemodynamics in intracranial aneurysm (IA) has been increasingly recognized. In this study, we constructed three types of comput... The importance of properly treating boundary conditions (BCs) in numerical simulation of hemodynamics in intracranial aneurysm (IA) has been increasingly recognized. In this study, we constructed three types of computational model for each IA to investigate how the outcome of numerical simulation is affected by the treatment of BCs. The first type of model (i.e., Type-A model) was obtained by applying 3-D hemodynamic modeling to the entire cerebral arterial network, with its solution being taken as the reference for evaluating the performance of the other two types of model (i.e., Type-B and Type-C models) in which 3-D modeling was confined to the aneurysm region. In addition, patient-specific 1-D models of the cerebral arterial network were developed to provide hemodynamic information for setting the inflow/outflow BCs of the 3-D models. Numerical tests on three IAs revealed that prescribing the outflow BCs of a localized 3-D aneurysm model based on 1-D model-simulated outflow division (i.e., Type-B model) instead of imposing the free outflow BC on all outlets (i.e., Type-C model) helped to improve the fidelity of the simulation of intra-aneurysmal hemodynamics, but could not guarantee a complete reproduction of the reference solution obtained by the Type-A model. Moreover, it was found that the outcome of hemodynamic simulation was more sensitive to the treatment of BCs when an aneurysm was located at arterial bifurcation rather than sidewall. These findings highlight the importance of taking into account systemic cerebroarterial hemodynamics in computational modeling of hemodynamics in IAs, especially those located at bifurcations. 展开更多
关键词 Intracranial aneurysm systemic cerebroarterial hemodynamics boundary conditions computational model
One-step In-situ Synthesis of Vacancy-rich CoFe2O4@Defective Graphene Hybrids as Bifunctional Oxygen Electrocatalysts for Rechargeable Zn-Air Batteries 认领
5
作者 WANG X in ZHUANG Linzhou +10 位作者 JIA Yi ZHANG Lijie YANG Qin XU Wenjia YANG Dongjiang YAN Xuecheng ZHANG Longzhou ZHU Zhonghua BROWN Christopher L YUAN Pei YAO Xiangdong 《高等学校化学研究:英文版》 SCIE CAS CSCD 2020年第3期479-487,共9页
Developing efficient catalysts toward both oxygen reduction reaction(ORR)and oxygen evolution reaction(OER)is the core task for rechargeable metal-air batteries.Although integration of two active components should be ... Developing efficient catalysts toward both oxygen reduction reaction(ORR)and oxygen evolution reaction(OER)is the core task for rechargeable metal-air batteries.Although integration of two active components should be an effective method to produce the bifunctional catalysts in principle,traditional techniques still can not attain fine tunable surface structure during material-hybridization process.Herein,we present a facile short-time in-situ argon(Ar)plasma strategy to fabricate a high-performance bifunctional hybrid catalyst of vacancy-rich CoFe2O4 synergized with defective graphence(r-CoFe2O4@DG).Reflected by the low voltage gap of 0.79V in two half-reaction measurements,the striking capability to catalyze ORR/OER endows it excellent and durable performance in rechargeable Zn-air batteries,with a maximum power density of 155.2mW/cm^2 and robust stablility(up to 60h).Further experimental and theoretical studies validate its remarkable bifunctional energetics root from plasma-induced surface vacancy defects and interfacial charge polarization between DG and CoFe2O4. 展开更多
关键词 Defect COFE2O4 Oxygen reduction Oxygen evolution Zn-air battery
Infusing High-density Polyethylene with Graphene-Zinc Oxide to Produce Antibacterial Nanocomposites with Improved Properties 认领
6
作者 You-Li Yao Manuel Reves De Guzman +11 位作者 Hong Duan Chen Gao Xu Lin Yi-Hua Wen Juan Du Li Lin Jui-Chin Chen Chin-San Wu Maw-Cherng Suen Ya-Li Sun Wei-Song Hung Chi-Hui Tsou 《高分子科学:英文版》 SCIE CAS CSCD 2020年第8期898-907,I0008,共11页
Nanocomposites of high-density polyethylene(HDPE)modified with 0.2 phr graphene-zinc oxide(GN-ZnO)exhibited optimal mechanical properties and thermal stability.Two other nano-materials—GN and nano-ZnO—were also used... Nanocomposites of high-density polyethylene(HDPE)modified with 0.2 phr graphene-zinc oxide(GN-ZnO)exhibited optimal mechanical properties and thermal stability.Two other nano-materials—GN and nano-ZnO—were also used to compare them with GN-ZnO.increasing the content of GN-ZnO gradually enhanced the antibacterial and barrier properties,but the addition of 0.3 phr GN-ZnO led to agglomeration that caused defects in the nanocomposites.Herein,we investigated the antibacterial and barrier properties of HDPE nanocomposites infused with different nanoparticles(GN,ZnO,GN-ZnO)of varying concentrations.HDPE and the nanoparticles were meltblended together in a Haake-Buchler Rheomixer to produce a new environment-friendly nano-material with improved physical and chemical properties.The following characterizations were conducted:tensile test,thermogravimetric analysis,morphology,differential scanning calorimetry,X-ray diffraction,antibacterial test,and oxygen and water vapor permeation test.The results showed that the crystallinity of HDPE was affected with the addition of GN-ZnO,and the nanocomposites had effective antibacterial capacity,strong mechanical properties,high thermal stability,and excellent barrier performance.This type of HDPE nanocomposites reinforced with GN-ZnO would be attractive for packaging industries. 展开更多
关键词 High-density polyethylene Zinc oxide Nanocomposite material Antibacterial properties Barrier performance
仿生各向异性高分子人工瓣膜制备及性能研究 认领
7
作者 郭峰 刘唱 +5 位作者 韩日峥 吕强 白芸 杨锐 牛盾 张兴 《中国科学:材料科学(英文版)》 SCIE EI CSCD 2020年第4期629-643,共15页
人体心脏瓣膜具有力学各向异性特征,使其能够承受长期的开合循环负荷.本文采用静电纺丝法分别制备了具有各向异性(anisotropic silk fibroin,ASF)和各向同性(isotropic silk fibroin,ISF)的丝素蛋白纤维膜,并进一步与聚乙二醇二丙烯酸酯... 人体心脏瓣膜具有力学各向异性特征,使其能够承受长期的开合循环负荷.本文采用静电纺丝法分别制备了具有各向异性(anisotropic silk fibroin,ASF)和各向同性(isotropic silk fibroin,ISF)的丝素蛋白纤维膜,并进一步与聚乙二醇二丙烯酸酯(poly(ethylene glycol)diacrylate,PEGDA)水凝胶结合,作为人工高分子瓣膜材料(PEGDA-ASF和PEGDA-ISF).有限元分析结果表明PEGDA-ASF瓣膜在心脏舒张期的最大主应力值(2.20 MPa)低于PEGDA-ISF瓣膜(2.37 MPa).与人体瓣膜相似,收缩期时PEGDA-ASF瓣膜在瓣叶根部附近会产生一个弯折区域,而PEGDA-ISF瓣膜的弯折区却接近瓣叶的自由边缘.此外,PEGDA-ASF瓣膜在打开过程中,能够通过动态调整弯折区域获得较为平滑的表面形貌.因此,人工高分子瓣膜的各向异性特征对于实现其与人体瓣膜相似的力学和流体动力学行为起着至关重要的作用. 展开更多
关键词 人工瓣膜 心脏舒张期 聚乙二醇二丙烯酸酯 心脏瓣膜 循环负荷 力学各向异性 弯折 瓣叶
The flexural property and its synergistic mechanism of multibody molded beetle elytron plates 认领
8
作者 YU XinDi ZHANG XiaoMing +3 位作者 CHEN JinXiang ZHAO CaiQi ZHAO TiDong FU YaQin 《中国科学:技术科学英文版》 SCIE EI CAS CSCD 2020年第5期768-776,共9页
To improve the applications of beetle elytron plates(BEPs,which are biomimetic sandwich plates inspired by beetle elytra),the flexural performance and its synergistic mechanism of multibody molded BEPs were investigat... To improve the applications of beetle elytron plates(BEPs,which are biomimetic sandwich plates inspired by beetle elytra),the flexural performance and its synergistic mechanism of multibody molded BEPs were investigated via cantilever testing and finite element method(FEM).The results are summarized as follows.(1)Although debonding damage causes failure of the multibody molded BEPs and honeycomb plate and the reasonable range of trabecular size for BEPs is narrow,both the optimal loading capacity per mass and failure deformation of the BEPs are over two times those of the honeycomb plate.(2)A flexural synergistic mechanism is revealed in the trabecular-honeycomb core structure of BEPs;this mechanism causes the maximum deformation of core structure to gradually transfer from the honeycomb wall to the trabeculae with the increase inη(the ratio of the trabecular radius to the distance between the center points of two trabeculae),which means the different stretching behaviors in these core structures.(3)Unlike the compressive mechanism of BEPs,by controlling and balancing the deformation degrees of the trabeculae and honeycomb walls,the flexural mechanism achieves a minimum core deformation and an optimal flexural performance.These results suggest a qualitative relationship between the deformation behavior of trabecular-honeycomb core structure and bending performance of the whole BEP,and provide a solid foundation for subsequent research and the considerable application potential of this biomimetic sandwich structure in many fields. 展开更多
关键词 beetle elytra BEP biomimetic structure sandwich structure honeycomb plate flexural property
In situ synthesis of FeS/Carbon fibers for the effective removal of Cr(Ⅵ)in aqueous solution 认领
9
作者 Rongrong Zhang Daohao Li +2 位作者 Jin Sun Yuqian Cui Yuanyuan Sun 《环境科学与工程前沿(英文)》 SCIE EI CAS CSCD 2020年第4期147-158,共12页
Iron sulfide(FeS)nanoparticles(termed FSNs)have attracted much attention for the removal of pollutants due to their high efficiency and low cost,and because they are environmentally friendly.However,issues of agglomer... Iron sulfide(FeS)nanoparticles(termed FSNs)have attracted much attention for the removal of pollutants due to their high efficiency and low cost,and because they are environmentally friendly.However,issues of agglomeration,transformation,and the loss of active components limit their application.Therefore,this study investigates in situ synthesized FeS/carbon fibers with an Fecarrageenan biomass as a precursor and nontoxic sulfur source to ascertain the removal efficiency of the fibers.The enrichment of sulfate groups as well as the double-helix structure in i-carrageenan-Fe could effectively avoid the aggregation and loss of FSNs in practical applications.The obtained FeS/carbon fibers were used to control a Cr(Ⅵ)polluted solution,and exhibited a relatively high removal capacity(81.62 mg/g).T he main mechanisms included the reduction of FeS,electrostatic adsorption of carbon fibers,and Cr(Ⅲ)-Fe(Ⅲ)complexation reaction.The pseudo-second-order kinetic model and Langmuir adsorption model both provided a good fit of the reaction process;hence,the removal process was mainly controlled by chemical adsorption,specifically monolayer adsorption on a uniform surface.Furthermore,co-existing anions,column,and regeneration experiments indicated that the FeS/carbon fibers are a promising remediation material for practical application. 展开更多
关键词 CARRAGEENAN FES Double-helix structure Hexavalent chromium
Reliable high temperature, high humidity flexible thin film encapsulation using Al2O3/MgO nanolaminates for flexible OLEDs 认领
10
作者 Ki Suk Kang So Yeong Jeong +1 位作者 Eun Gyo Jeong Kyung Cheol Choi 《纳米研究:英文版》 SCIE EI CAS CSCD 2020年第10期2716-2725,共10页
Since most organic materials are very sensitive to moisture and oxygen, organic light emitting diodes (OLEDs) require an encapsulation layer to protect the active layer from these gases. Since light, flexible and port... Since most organic materials are very sensitive to moisture and oxygen, organic light emitting diodes (OLEDs) require an encapsulation layer to protect the active layer from these gases. Since light, flexible and portable OLEDs are being employed in more diverse climates and environmental conditions, the OLED encapsulation layer must retain robust mechanical properties and stability in high temperature/high humidity conditions. Al2O3 films have demonstrated excellent barrier performance, but they readily hydrolyze when exposed to prolonged harsh environments. In this study, we fabricated a thin film encapsulation (TFE) film that was resistant to hydrolysis, using Al2O3/MgO (AM) nanolaminates. MgO has superior resistance to harsh environments, and the aluminate phase generated by the chemical reaction of Al2O3 and MgO provided excellent barrier performance, even after storage in harsh conditions. A multi-barrier fabricated using the AM nanolaminate showed excellent barrier performance, close to the level required by OLEDs. It did not significantly deteriorate even after a bending test of 1,000 iterations at 0.63% strain. After 1,000 cycle of bending, the electrical properties of the passivated OLEDs were not significantly degraded at shelf-lifetime test where the fabricated device was stored for 50 days in a harsh environment of 60℃, 90% relative humidity. The multi-barrier shows the best performance compared to previous studies on flexible encapsulation that can be used in harsh environments. 展开更多
关键词 thin film encapsulation nanolaminate structure AL2O3 MGO FLEXIBLE organic light emitting diode(OLED)
Preparation of Polyimide Fiber/ Thermoplastic Resin Composites with Improved Mechanical Properties 认领
11
作者 Hongyang Dang Le Chen +3 位作者 Guoliang Zhang Ruqiang Zhang Jie Chen Zhu Long 《造纸与生物质材料:英文版》 2019年第3期30-38,共9页
As a high-performance material for preparing composite materials, polyimide fibers suffer from many potential drawbacks, including poor bonding with other substrates, which results in composite materials with poor mec... As a high-performance material for preparing composite materials, polyimide fibers suffer from many potential drawbacks, including poor bonding with other substrates, which results in composite materials with poor mechanical properties. Therefore, this study proposed a simple and rapid technique for obtaining loose, porous polyimide fiber papers by implementing a wet method using equal amounts of polyimide fiber and polyimide fiber paper as reinforcements, respectively. The polyimide resin-based composite materials were prepared by hand lay-up and hot pressing. The results showed that the paper-based reinforcement exhibited high porosity and the fibers were arranged with a uniform pore size distribution. The tensile properties, bending performance, and interlaminar shear performance of the paper-based composite improved by 130%, 108%, and 34.5%, respectively, compared to those of the fiberbased counterpart. The factors affecting the mechanical properties of the composites were analyzed based on the fiber length, fiber beating or lack thereof, and the basis weight of the paper. The increased uniformity of the polyimide fiber paper changed the ordering of the fibers and resolved drawbacks such as difficult dispersion, uneven pore size distribution, and poor mechanical properties related to single fibers in the resin-based composite material. 展开更多
关键词 composites POLYIMIDE FIBER POLYIMIDE FIBER paper WET FORMING technology mechanical properties
在线阅读 下载PDF
Photoreductive Dissolution of Schwertmannite with Incorporated As(Ⅴ) Induced by Oxalate and the Mobilization of As(Ⅴ) 认领
12
作者 Zhaoyang Ji Haitao Ren +1 位作者 Shaoyi Jia Songhai Wu 《天津大学学报:英文版》 EI CAS 2019年第3期258-265,共8页
Schwertmannite(Sh),a poorly crystalline iron(hydr)oxide that usually appears in acid mine drainage,plays a significant role in the immobilization of As(V).In this study,the effects of UV irradiation and oxalate on the... Schwertmannite(Sh),a poorly crystalline iron(hydr)oxide that usually appears in acid mine drainage,plays a significant role in the immobilization of As(V).In this study,the effects of UV irradiation and oxalate on the dissolution of Sh with structurally incorporated As(V)[Sh-As(V)] and the subsequent mobilization of As(V) were investigated at pH 3.0.In the dark,more total dissolved Fe was produced(the maximum value was 33.2 mg/L) in the suspensions of Sh-As(V) with oxalate than in those without oxalate.UV irradiation slightly enhanced the mobilization of As(V) for the system of Sh-As(V)-1 and Sh-As(V)-2 in the absence of oxalate compared with that in the dark.However,in the presence of oxalate,UV irradiation caused the concentration of mobilized As(V) to decline by 630-875% compared with that in the dark.This study enhanced our understanding of the mobilization of As(V) and demonstrated that UV irradiation could contribute to the immobilization of As(V) on Sh in aqueous environments containing oxalate. 展开更多
关键词 SCHWERTMANNITE Photoreductive DISSOLUTION OXALATE As(Ⅴ) MOBILIZATION
在线阅读 下载PDF
Synchronization control design for uncertain coronary artery time-delay system with input saturation 认领
13
作者 Zhanshan Zhao Fei Lv +1 位作者 Jing Zhang Liankun Sun 《生物数学学报:英文版》 SCIE 2019年第3期63-78,共16页
A synchronization control scheme is proposed for uncertain coronary artery system (CAS) with input saturation. In order to deal with the input saturation, linear matrix inequalities (LMIS), adequate conditions are obt... A synchronization control scheme is proposed for uncertain coronary artery system (CAS) with input saturation. In order to deal with the input saturation, linear matrix inequalities (LMIS), adequate conditions are obtained based on the local sector condition. Furthermore, by constructing Lyapunov-Krasovskii functional (LKF), we design a state feedback controller to achieve synchronization for chaos system with input saturation. Moreover, the improved Jensen inequality, convex analysis, delay-partitioning approach and Moon et al.’s inequality are utilized to get the less conservative. Finally, the simulation result is given to explain the effectiveness of the proposed synchronization control scheme. 展开更多
关键词 CORONARY ARTERY system input SATURATION TIME-VARYING DELAYS delay-partitioning approach
Tumor Photothermal Therapy Employing Photothermal Inorganic Nanoparticles/Polymers Nanocomposites 认领
14
作者 Shu-Wei Liu Lu Wang +3 位作者 Min Lin Yi Liu Le-Ning Zhang Hao Zhang 《高分子科学:英文版》 SCIE CAS CSCD 2019年第2期115-128,共14页
The past decade has witnessed the booming developments of the new methodologies for noninvasive tumor treatment, which are considered to overcome the current limitation of low treating efficacy, high risk of tumor rec... The past decade has witnessed the booming developments of the new methodologies for noninvasive tumor treatment, which are considered to overcome the current limitation of low treating efficacy, high risk of tumor recurrence, and severe side effects. Among a variety of novel therapeutic methods, photothermal therapy, employing nanometer-sized agents as the heat generators under near-infrared(NIR) light irradiation to ablate tumors, gives new insights into noninvasive tumor treatments with minimal side effects. Although many nanomaterials possess photothermal effects, inorganic nanoparticles and polymers are the most competitive alternatives considering the high photothermal performance and good biocompatibility. In this review, we summarized the tumor photothermal therapy using the nanocomposites composed of inorganic nanoparticles and polymers. Extinction coefficient and photothermal transduction efficiency are the two main factors to evaluate the photothermal performance of nanocomposites in vitro. Considering the improvement in the stability,biocompatibility, blood circulation half-life, and tumor uptake rate after polymer coating, these nanocomposites should be designed with inorganic core and polymer shell, thus improving the tumor treating efficacy in vivo. Such structure fulfills the requirements of high photothermal performance and good bio-security, making it possible to achieve complete ablation for shallow and small tumors under the safe limitation of NIR laser power density. 展开更多
关键词 NANOCOMPOSITES PHOTOTHERMAL therapy INORGANIC nanoparticles POLYMERS TUMOR THERANOSTICS
Shadow–highlight feature matching automatic small crater recognition using high-resolution digital orthophoto map from Chang’E Missions 认领
15
作者 Wei Zuo Chunlai Li +5 位作者 Lingjie Yu Zhoubin Zhang Rongwu Wang Xingguo Zeng Yuxuan Liu Yaying Xiong 《中国地球化学学报:英文版》 EI CAS CSCD 2019年第4期541-554,共14页
This paper introduces a new method of small lunar craters’ automatic identification, using digital orthophoto map(DOM) data. The core of the approach is the fact that the lunar exploration DOM data reveal contrasting... This paper introduces a new method of small lunar craters’ automatic identification, using digital orthophoto map(DOM) data. The core of the approach is the fact that the lunar exploration DOM data reveal contrasting highlight and shadow characteristics of small craters under sunlight irradiation. This research effort combines image processing and mathematical modeling. Overall it proposes a new planetary data processing approach, to segment and extract the highlight and shadow regions of small craters,using the image gray frequency(IGF) statistical method.IGF can also be applied to identify the coupling relationships between small craters’ shape and their relative features. This paper presents the highlight and shadow pair matching(HSPM) model which manages to perform highprecision automatic recognition of small lunar craters.Testing was performed using the DOM data of Chang’E-2(CE-2). The results have shown that the proposed method has a high level of successful detection rate. The proposed methodology that uses DOM data can complement the drawbacks of the digital elevation model(DEM) that has a relatively high false detection rate. A hybrid fusion model(FUM) that combines both DOM and DEM data, was carried out to simultaneously identify small, medium, and large-sized craters. It has been proven that the FUM generally shows stronger recognition ability compared to previous approaches and it can be adapted for high precision identification of craters on the whole lunar surface.The results meet the requirements for a reliable and accurate exploration of the Moon and the planets. 展开更多
关键词 MOON CRATER RECOGNITION Image processing Space exploration
Fabrication and characterization of novel foaming polyurethane hollow fiber membrane 认领 被引量:1
16
作者 Yanjie Wu Changfa Xiao +1 位作者 Hailiang Liu Qinglin Huang 《中国化学工程学报:英文版》 SCIE EI CAS CSCD 2019年第4期935-943,共9页
Foam-like materials had attracted great interest as promising absorbent. In this study, thermoplastic polyurethane(TPU) block sponge was synthesized. Polyester(PET) braid tubular reinforced polyurethane(PU) spongy hol... Foam-like materials had attracted great interest as promising absorbent. In this study, thermoplastic polyurethane(TPU) block sponge was synthesized. Polyester(PET) braid tubular reinforced polyurethane(PU) spongy hollow fiber membrane was prepared by a concentric circular spinning method. The method was woven from an outer coated water-blown PU separation layer and inner PET braid tubular. We have developed a simple and useful preparation technique for the PU spongy hollow fiber membrane. For the first time, the PU spongy hollow fiber membrane was prepared using a coating and controlled foaming technique. The influence of toluene isocyanate index on the physical properties, morphology, and structure of flexible PU sponge was discussed in terms of water contact angle(CA), pure water flux(PWF), Fourier Transform Infrared Analysis(FTIR),pressure-responsive property, and pull-out strength. The morphologies of the membranes were investigated by scanning electron microscopy. We have characterized the foams from an intuitive point of view and demonstrated that the dimensional morphology of the membrane was closely related to isocyanate index. The result showed that the surface cell size of the PU sponge hollow fiber membrane gradually decreased with an increase of the isocyanate index. Due to the elasticity of PU at room temperature, the pressure responsive characteristic of the membrane was prepared. When isocyanate index was 1.05, the interface bonding strength of PU spongy hollow fiber membranes reached as high as 0.37 MPa, porosity and PWF were 71.5% and 415.5 L·m^-2·h^-1,respectively. 展开更多
关键词 POLYURETHANE (PU) Spongy HOLLOW FIBER MEMBRANE Pressure RESPONSIVE FOAMING
在线阅读 下载PDF
Dependence of Mechanical Performance of Polytetrafluoroethylene Filament on Elongation of Dispersion Particles 认领
17
作者 杨斌 徐玉康 靳向煜 《东华大学学报:英文版》 EI CAS 2019年第2期187-191,共5页
The effect of elongation of particles in dispersion powders on mechanical performance of polytetrafluoroethylene(PTFE)flat filament is analyzed.Morphology and elongation of particles in four different PTFE dispersion ... The effect of elongation of particles in dispersion powders on mechanical performance of polytetrafluoroethylene(PTFE)flat filament is analyzed.Morphology and elongation of particles in four different PTFE dispersion powders are analyzed.Meanwhile,the correlation between elongation and diameter of dispersion particles is discussed.Strength-elongation curves of PTFE flat filaments made of four different dispersion powders are obtained from measurements of mechanical behaviors.Experimental results show that PTFE flat filament manufactured with dispersion particles having appropriate elongation(0.55-0.60)shows excellent mechanical performance.This work could be regarded as a reference for manufacturing high performance PTFE flat filaments. 展开更多
关键词 polytetrafluoroethylene(PTFE) FILAMENT particle ELONGATION mechanical performance
在线阅读 下载PDF
Ultrafine polycrystalline titania nanofibers for superior sodium storage 认领
18
作者 Zhidan Diao Daming Zhao +3 位作者 Chunxiao Lv Hongli Liu Dongjiang Yang Shaohua Shen 《能源化学:英文版》 SCIE EI CAS CSCD 2019年第11期153-161,共9页
Sodium ion batteries have a huge potential for large-scale energy storage for the low cost and abundance of sodium resources. In this work, a novel structure of ultrafine polycrystalline TiO2 nanofibers is prepared on... Sodium ion batteries have a huge potential for large-scale energy storage for the low cost and abundance of sodium resources. In this work, a novel structure of ultrafine polycrystalline TiO2 nanofibers is prepared on nickel foam/carbon cloth by a simple vapor deposition method. The as-prepared TiO2 nanofibers show excellent performance when used as anodes for sodium-ion batteries. Specifically, the TiO2 nanofibers@nickel foam electrode delivers a high reversible capacity of 263.2 m Ahg^-1 at 0.2 C and maintains a considerable capacity of 144.2 m Ahg^-1 at 10 C. The TiO2 nanofibers@carbon cloth electrode also shows excellent high-rate capability, sustaining a capacity of 148 m Ahg^-1 after 20 0 0 cycles at 10 C. It is believed that the novel nanofibrous structure increases the contact area with the electrolyte and greatly shortens the sodium ion diffusion distance, and meanwhile, the polycrystalline nature of nanofibers exposes more intercalation sites for sodium storage. Furthermore, the density functional theory calculations exhibit strong ionic interactions between the exposed TiO2(101) facets and sodium ions, leading to a preferable sodiation/desodiation process. The unique structural features endow the TiO2 nanofibers electrodes great advantages in rapid sodium storage with an outstanding high-rate capability. 展开更多
关键词 POLYCRYSTALLINE TITANIA NANOFIBERS SODIUM STORAGE High-rate capability
在线阅读 下载PDF
In situ atomic-scale observation of monolayer graphene growth from SiC 认领
19
作者 Kaihao Yu Wen Zhao +8 位作者 Xing Wu Jianing Zhuang Xiaohui Hu Qiubo Zhang Jun Sun Tao Xu Yang Chai Feng Ding Litao Sun 《纳米研究:英文版》 SCIE EI CAS CSCD 2018年第5期2809-2820,共12页
关键词 生长动力学 原子核 原文 单层 INITIO 取向附生 电子显微镜 相容性
Influence of dihydric alcohols on color performance of reactive dye inks 认领
20
作者 Wang Zhaofeng 《数码设计》 2018年第24期35-36,共2页
The effect of five dihydric alcohols on the fixation rate and K/S value of reactive dyes on cotton fabrics was investigated.Results show that the more primary hydroxyl groups are contained in the isomeric dihydric alc... The effect of five dihydric alcohols on the fixation rate and K/S value of reactive dyes on cotton fabrics was investigated.Results show that the more primary hydroxyl groups are contained in the isomeric dihydric alcohols,the greater activity of reacting with the reactive dye.Longer carbon chain also increases the reactivity of dihydric alcohols with reactive dyes.This study provides a theoretical basis for the selection of suitable dihydric alcohols in preparation reactive dye inkjet printing ink. 展开更多
关键词 dihydric ALCOHOLS REACTIVE DYE INKS FIXATION rate K/S value
在线阅读 下载PDF
上一页 1 2 5 下一页 到第
使用帮助 返回顶部 意见反馈