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文章速递Determination of dielectric properties of titanium carbide fabricated by microwave synthesis with Ti-bearing blast furnace slag 认领
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作者 Peng Liu Li-bo Zhang +3 位作者 Bing-guo Liu Guang-jun He Jin-hui Peng Meng-yang Huang 《矿物冶金与材料学报:英文版》 SCIE EI CAS CSCD 2021年第1期88-97,共10页
The preparation of functional material titanium carbide by the carbothermal reduction of Ti-bearing blast furnace slag with microwave heating is an effective method for valuable metals recovery;it can alleviate the en... The preparation of functional material titanium carbide by the carbothermal reduction of Ti-bearing blast furnace slag with microwave heating is an effective method for valuable metals recovery;it can alleviate the environmental pressure caused by slag stocking.The dynamic dielectric parameters of Ti-bearing blast furnace slag/pulverized coal mixture under high-temperature heating are measured by the cylindrical resonant cavity perturbation method.Combining the transient dipole and large π bond delocalization polarization phenomena, the interaction mechanism of the microwave macroscopic non-thermal effect on the titanium carbide synthesis reaction was revealed.The material thickness range during microwave heating was optimized by the joint analysis of penetration depth and reflection loss, which is of great significance to the design of the microwave reactor for the carbothermal reduction of Ti-bearing blast furnace slag. 展开更多
关键词 titanium-bearing blast furnace slag dielectric mechanism penetration depth reflection loss microwave heating efficiency
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文章速递Marker-Assisted Breeding of Thermo-Sensitive Genic Male Sterile Line 1892S for Disease Resistance and Submergence Tolerance 认领
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作者 Luo Yanchang Ma Tingchen +4 位作者 Joanne Teo Luo Zhixiang Li Zefu Yang Jianbo Yin Zhongchao 《水稻科学:英文版》 SCIE CSCD 2021年第1期89-98,共10页
Rice line 1892S is an elite thermo-sensitive genic male sterile(TGMS)line for two-line hybrid rice production.However,1892S is susceptible to rice blast,bacterial blight and submergence.Here we reported the introducti... Rice line 1892S is an elite thermo-sensitive genic male sterile(TGMS)line for two-line hybrid rice production.However,1892S is susceptible to rice blast,bacterial blight and submergence.Here we reported the introduction of blast resistance(R)gene Pi9,bacterial blight R gene Xa21 and submergence tolerance gene Sub1A into 1892S genetic background through backcrossing and marker-assisted selection.The improved TGMS line 31892S and its hybrids conferred disease resistance to rice blast and bacterial blight,and showed submergence tolerance for over 14 d without significant loss of viability.The sterility-fertility conversion of 31892S was similar to that of 1892S.31892S and its derived hybrid rice had similar agronomic traits and grain quality with 1892S and the control hybrid rice,respectively.The newly developed 31892S provided an improved TGMS line for two-line hybrid rice production with disease resistance to rice blast and bacterial blight,and submergence tolerance with no yield penalty or change in grain quality. 展开更多
关键词 thermo-sensitive genic male sterility bacterial blight rice blast submergence tolerance disease resistance marker-assisted selection
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文章速递An alternative approach to predict human response to blast induced ground vibration 认领
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作者 Turker Hudaverdi Ozge Akyildiz 《地震工程与工程振动:英文版》 SCIE EI CSCD 2021年第1期257-273,共17页
The aim of this study is to create alternative approaches to predict human response to ground vibration.Site measurements were conducted in an urban quarry.The multiple discriminant analysis technique was used to deve... The aim of this study is to create alternative approaches to predict human response to ground vibration.Site measurements were conducted in an urban quarry.The multiple discriminant analysis technique was used to develop classification models.The measured ground vibration values were grouped based on the limit values appearing in the literature.Two classification models were created to predict human response to ground vibration.In addition,classical predictor equations were developed to compare to the classification models.The best equations were chosen considering several error measures.All the models were tested on the independent data.The prediction accuracy of the discriminant analysis models is quite promising.Nearly eighty-nine percent of the test data were correctly classified.The classification models have a combined structure.The results of the models can be directly presented to the neighbors of the studied quarry.The models are not complex.They do not require additional software or information to practice and can be easily used by site engineers. 展开更多
关键词 blast vibration human response discriminant analysis aggregate quarry
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Valorization of harbor dredged sediment activated with blast furnace slag in road layers 认领
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作者 Abdelwaheb Ben Slama Nesma Feki +1 位作者 Daniel Levacher Moncef Zairi 《国际泥沙研究:英文版》 SCIE 2021年第1期127-135,共9页
The valorization solutions for dredged sediment have been the subject of a great number of investigations over the previous decades.In the current present study,treatment of polluted dredged sediment fom the commercia... The valorization solutions for dredged sediment have been the subject of a great number of investigations over the previous decades.In the current present study,treatment of polluted dredged sediment fom the commercial port of Sfax,Tunisia,is proposed.An industrial byproduct(blast furnace slag)was used to bind raw sediment for a reuse in road engineering.Following standards of this field,the raw sediment first was identified and classified according to the French technical guidance.Then an environmental assessment was applied due to the presence of heavy metals.The concentrations were measured on the raw sediment particles so as to control the binding effect on heavy metals.Sediment mixtures consisted of a mix of sand and a blast furnace slag activated with quicklime.Different mixtures were tested and some were proposed for sub-layer applications.The Sfax commercial port raw sediment is considered as a sandy loam with a very low fraction of clay.The measured concentrations of heavy metals exceed the recommended thresholds for cadmium,copper,lead,and zinc.These can induce hazardous effects in the case of their dumping into the sea.On the other hand,the concentrations of the detected elements after leaching tests run on raw sediment samples are very low compared to the thresholds;such results highlight a possible recycling of the raw sediment in subgrade layers without any negative impact.Suitable formulations were deduced for road engineering tests relying on the ratio the California Bearing Ratio index and the immediate bearing index.If the obtained ratio exceeds one,the treated sediment can be recycled and used in road layers. 展开更多
关键词 Sediment Sfax commercial port Blast furnace slag VALORIZATION Road layers Bearing capacity
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New Blast Damage Criterion for Damage Prediction 认领
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作者 Ajay Kumar Jha 《地质资源与工程:英文版》 2020年第2期42-54,共13页
There are several underground mines in India which operate in close proximity to an operating surface mine.Under such scenario,the blast induced stress waves generated due to surface blasting may be a potential source... There are several underground mines in India which operate in close proximity to an operating surface mine.Under such scenario,the blast induced stress waves generated due to surface blasting may be a potential source to cause instability of adjoining underground mine structures.Using seismographs,54 blast induced vibration data were recorded at various locations in the roof,floor and pillars of the underground mine at Hingir Rampur mine of Coal India Limited by synchronizing the timing of surface blasting carried at an adjacent Samleshwari opencast mine.Results of this study show that Artificial Neural Network(ANN)has better prediction potential of peak particle velocity(PPV)and damage to adjacent underground structures due to surface blasting as compared to conventional regression methods.In order to assess and predict the impact of surface blasts on underground workings,Blast Damage Factor(BDF)has been evolved.The study shows that site specific charts can predict the blast damage class at an underground location due to surface blasting for known distances and explosive charge per delay.The severe damage in case study mine site took place when peak particle velocity exceeded 162 mm/s and PPV less than 51 mm/s had no probability of damage to underground structures due to surface blasting. 展开更多
关键词 Blast damage prediction blast damage factor underground damage
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Three Reverse Adipofascial Cross Finger Flaps Used for Coverage of Raw Areas on Two Fingers of a Patient with Blast Injury of the Hand—Case Report 认领
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作者 Medhat Emil Anood Alqaydi +4 位作者 Dalal AlMansoori Dalia Medhat Habib Marwa Alawadhi Abrar Alteneiji Omar Alameri 《现代整形外科(英文)》 2020年第3期75-81,共7页
We report a case of blast injury to the left hand which resulted in fractures of the fingers with exposure of bones and joints of the phalanges. We used three reverse adipofascial cross finger flaps raised at the same... We report a case of blast injury to the left hand which resulted in fractures of the fingers with exposure of bones and joints of the phalanges. We used three reverse adipofascial cross finger flaps raised at the same time from 2 fingers to reconstruct adjacent fingers of the patient. The patient recovered well postoperatively and had good range of movement of the fingers. This avoided the complications of the use of regional or distal flaps. To our knowledge, this is the first case reported in which three reverse adipofascial cross fingers flaps are raised at the same time, two of them from an injured finger, to cover three raw areas on two fingers of a patient. 展开更多
关键词 Adipofascial Flap Reverse Cross Finger Flap Blast Injury Hand Simultaneous Flaps Fingers
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近爆作用下钢筋混凝土柱数值分析加载方法对比 认领
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作者 闫秋实 陈天一 廖维张 《北京工业大学学报》 CAS CSCD 北大核心 2020年第2期154-161,共8页
为了研究近爆作用下不同数值分析加载方法对钢筋混凝土柱动力响应及破坏形式影响,运用AUTODYN对钢筋混凝土柱在近距离爆炸下的超压荷载进行模拟并提出一种荷载简化计算方法.基于LS-DYNA建立近爆作用下钢筋混凝土柱动态响应及其损伤破坏... 为了研究近爆作用下不同数值分析加载方法对钢筋混凝土柱动力响应及破坏形式影响,运用AUTODYN对钢筋混凝土柱在近距离爆炸下的超压荷载进行模拟并提出一种荷载简化计算方法.基于LS-DYNA建立近爆作用下钢筋混凝土柱动态响应及其损伤破坏的三维有限元模型,近爆荷载分别采用简化后的荷载、Load blast命令和“炸药-空气-混凝土柱”流固耦合3种加载方法加载,将模拟结果与爆炸破坏试验结果对比,分析不同加载方法在误差、计算效率、所占内存等方面的特点.研究结果表明,简化荷载加载方式位移误差较小且所占内存较小,但需要掌握2种软件多次建模;blast-load计算模型加载方式建模简单、计算时间较短、所占内存较小、模型稳定但残余位移误差较大;“炸药-空气-混凝土柱”流固耦合加载方式建模较为复杂、计算时间较长、所占内存较大,但误差较小. 展开更多
关键词 近爆 荷载简化 LOAD BLAST 流固耦合 数值模拟
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Effects of Blast Wave-induced Biomechanical Changes on Lung Injury in Rats 认领
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作者 LIU Wei CHAI Jia Ke +10 位作者 QIN Bin HAN Shao Fang WANG Xiao Teng JIANG Shuai BAI Hai Liang LIU Ling Ying CHANG Yang YUE Xiao Tong WU Yu Shou ZHANG Zi Hao TANG Lang 《生物医学与环境科学:英文版》 SCIE CAS CSCD 2020年第5期338-349,共12页
Objective To observe the dynamic impacts of shock waves on the severity of lung injury in rats with different injury distances.Methods Simulate open-field shock waves;detect the biomechanical effects of explosion sour... Objective To observe the dynamic impacts of shock waves on the severity of lung injury in rats with different injury distances.Methods Simulate open-field shock waves;detect the biomechanical effects of explosion sources at distances of 40,44,and 48 cm from rats;and examine the changes in the gross anatomy of the lungs,lung wet/dry weight ratio,hemoglobin concentration,blood gas analysis,and pathology.Results Biomechanical parameters such as the overpressure peak and impulse were gradually attenuated with an increase in the injury distance.The lung tissue hemorrhage,edema,oxygenation index,and pathology changed more significantly for the 40 cm group than for the 44 and 48 cm groups.The overpressure peak and impulse were significantly higher for the 40 cm group than for the 44 and 48 cm groups(P<0.05 or P<0.01).The animal mortality was significantly higher for the 40 cm group than for the other two groups(41.2%vs.17.8%and 10.0%,P<0.05).The healing time of injured lung tissues for the 40 cm group was longer than those for the 44 and 48 cm groups.Conclusions The effects of simulated open-field shock waves on the severity of lung injuries in rats were correlated with the injury distances,the peak overpressure,and the overpressure impulse. 展开更多
关键词 Shock wave Animal model Open-field blast Lung injury Biomechanical effect
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Review on improving gas permeability of blast furnace 认领
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作者 Yu-zhu Pan Hai-bin Zuo +3 位作者 Jing-song Wang Qing-guo Xue Guang Wang Xue-feng She 《钢铁研究学报:英文版》 SCIE EI CAS CSCD 2020年第2期121-131,共11页
Blast furnace ironmaking process is the most mature and highly effective process for producing liquid iron.Blast furnace is a gas-solid and gas-solid-liquid countercurrent reactor,and maintaining gas permeability is t... Blast furnace ironmaking process is the most mature and highly effective process for producing liquid iron.Blast furnace is a gas-solid and gas-solid-liquid countercurrent reactor,and maintaining gas permeability is the precondition of smooth production.Therefore,improving the gas permeability throughout the blast furnace remains a hot issue which is concerned by many metallurgical scholars.According to the research results of many scholars,the dominant factors influencing the gas permeability of different locations in the blast furnace(locations are distinguished according to the morphology change of the burdens)were reviewed.And the strategies for improving the gas permeability of different locations in the blast furnace were summarized based on these dominant influencing factors,such as suppressing the low-temperature reduction degradation of sinter in the lump zone,improving the indirect reduction degree and suppressing the interaction between different burdens.It is hoped to provide both theoretical and practical values for guiding the blast furnace so as to improve smooth operation and smelting efficiency. 展开更多
关键词 IRONMAKING BLAST FURNACE Gas PERMEABILITY LOCATION
Effect of H2 addition on process of primary slag formation in cohesive zone 认领
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作者 Ya-na Qie Qing Lyu +2 位作者 Chen-chen Lan Shu-hui Zhang Ran Liu 《钢铁研究学报:英文版》 SCIE EI CAS CSCD 2020年第2期132-140,共9页
Based on the technology of gas-injection blast furnace(BF),the characteristics of primary slag formation with H2 addition were researched.The results indicate that,compared with traditional BF,the primary melt is form... Based on the technology of gas-injection blast furnace(BF),the characteristics of primary slag formation with H2 addition were researched.The results indicate that,compared with traditional BF,the primary melt is formed at a lower temperature,which promotes the deformation of the solid burden particles.With the increase in temperature and H2 content,the quantity of formed melt containing FeO decreases sharply,corresponding to the crystallization of solid 2CaO Si02 during reduction.A wider softening range and narrower melting zone could be found in the gas-injection BF with a higher reduction potential.The permeability of burden layer is ameliorated as a result of decreased melt quantity.The influence of H2 on the high-temperature properties of burden is not so conspicuous when the H2 addition is from 10 to 15 vol.%against 5 to 10 vol.%.What is more,the slag shows a better liquidity with the decrease in basicity,owing to the transformation of melt composition from a primary phase field with high melting point to that with low melting point.The process of slag forming in gas-injection BF is characterized by earlier melt formation,less primary slag,higher melting temperature,better permeability and better liquidity,and the phase compositions of primary slag are close to those of final slag. 展开更多
关键词 Reduction degradation Primary SLAG FORMATION MELT Hydrogen ADDITION Gas-injection BLAST FURNACE
隧道近区爆破振动动应变测试及其应用 认领
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作者 罗驰 杨新安 +2 位作者 李坤 王斌 肖承倚 《振动与冲击》 EI CSCD 北大核心 2020年第2期262-268,共7页
隧道爆破振动动应变测试可以直接反映岩体或支护结构的应力状况,明确爆破冲击对隧道围岩及支护结构的扰动情况,对隧道近区爆破有重要意义。以京张高铁八达岭长城站项目为依托,通过对测试系统的减振保护和连接加固来改进现场爆破动应变... 隧道爆破振动动应变测试可以直接反映岩体或支护结构的应力状况,明确爆破冲击对隧道围岩及支护结构的扰动情况,对隧道近区爆破有重要意义。以京张高铁八达岭长城站项目为依托,通过对测试系统的减振保护和连接加固来改进现场爆破动应变测试环境,较准确地测出现场隧道初期支护的爆破振动动应变,给出隧道爆破动应变在隧道迎爆侧及背爆侧、隧道环向及纵向的分布规律。结合爆破振速监测,研究爆破动应变与振速的相关性,提出一种在建隧道结构允许振动速度标准的确定方法,该方法基于现场实测得到爆破动应变与振速的相关性及隧道结构允许动应变来计算确定。研究表明:隧道初期支护现场爆破振动动应变测试是可行和可靠的;隧道初期支护迎爆侧的动应变比背爆侧大,沿隧道环向的动应变比沿隧道纵向大,隧道交叉口区域的纵向动应变显著增大;爆破振动速度与动应变存在较好的正线性相关性,即动应变越大,振动速度越高;该方法能确定在建隧道结构的允许振动速度,并为在建隧道的爆破振动保护提供参考。 展开更多
关键词 隧道工程 爆破 动应变测试 隧道结构 振动速度
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Value of lung ultrasound score for evaluation of blast lung injury in goats 认领
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作者 Yu-Qi Xue Chun-Shuang Wu +6 位作者 Hua-Cai Zhang Juan Du Jian-Hui Sun An-Qiang Zhang Ling Zeng Mao Zhang Jian-Xin Jiang 《中华创伤杂志:英文版》 CAS CSCD 2020年第1期38-44,共7页
Purpose:To establish a severe blast lung injury model of goats and investigate the feasibility of lung ultrasonic score in the evaluation of blast lung injury.Methods:Twenty female healthy goats were randomly divided ... Purpose:To establish a severe blast lung injury model of goats and investigate the feasibility of lung ultrasonic score in the evaluation of blast lung injury.Methods:Twenty female healthy goats were randomly divided into three groups by different driving pressures:4.0 MPa group(n=4),4.5 MPa group(n=12)and 5.0 MPa group(n=4).The severe blast lung injury model of goats was established using a BST-I bio-shock tube.Vital signs(respiration,heart rate and blood pressure),lung ultrasound score(LUS),PO2/FiO2 and extravascular lung water(EVLW)were measured before injury(0 h)and at 0.5 h,3 h,6 h,9 h,12 h after injury.Computed tomography scan was performed before injury(0 h)and at 12 h after injury for dynamic monitoring of blast lung injury and measurement of lung volume.The correlation of LUS with PaO2/FiO2,EVLW,and lung injury ratio(lesion volume/total lung volume*100%)was analyzed.All animals were sacrificed at 12 h after injury for gross observation of lung injury and histopathological examination.Statistical analysis was performed by the SPSS 22.0 software.The measurement data were expressed as mean±standard deviation.The means of two samples were compared using independent-sample t-test.Pearson correlation analysis was conducted.Results:(1)At 12 h after injury,the mortality of goats was 0,41.67% and 100%in the 4.0 Mpa,4.5 MPa and 5.0 MPa groups,respectively;the area of pulmonary hemorrhage was 20.00%±13.14% in the 4.0 Mpa group and 42.14%±15.33% in the 4.5 MPa group.A severe lung shock injury model was established under the driving pressure of 4.5 MPa.(2)The respiratory rate,heart rate,LUS and EVLW were significantly increased,while PaO2/FiO2 was significantly reduced immediately after injury,and then they gradually recovered and became stabilized at 3 h after injury.(3)LUS was positively correlated with EVLW(3 h:r=-0.597,6 h:r=-0.698,9 h:r=-0.729;p<0.05)and lung injury ratio(12 h:r=-0.884,p<0.05),negatively correlated with PaO2/FiO2(3 h:r=-0.871,6 h:r=-0.637,9 h:r=-0.658;p<0.05).Conclusion:We established a sever 展开更多
关键词 BLAST INJURIES LUNG INJURY Goats Bio-shock tube
钢筋混凝土排架结构的抗爆破坏等级 认领
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作者 张帝 杨军 +3 位作者 曾丹 陈泰年 高金明 汤宇 《爆炸与冲击》 EI CAS CSCD 北大核心 2020年第12期43-54,共12页
为了研究钢筋混凝土排架结构在大当量爆炸冲击波下的破坏规律,依据最大TNT当量为3 t的爆炸试验,对排架主体结构的抗爆破坏等级进行数值模拟研究。通过量纲分析得到1/2缩比模型的荷载参数和结构尺寸。基于Abaqus有限元软件,利用CONWEP方... 为了研究钢筋混凝土排架结构在大当量爆炸冲击波下的破坏规律,依据最大TNT当量为3 t的爆炸试验,对排架主体结构的抗爆破坏等级进行数值模拟研究。通过量纲分析得到1/2缩比模型的荷载参数和结构尺寸。基于Abaqus有限元软件,利用CONWEP方法实现爆炸加载,分别计算装药0.5 t爆距33 m和装药3 t爆距33 m两种工况下排架结构的破坏形态,并与试验结果进行对比。进一步通过控制药量和距离,计算不同超压和冲量下缩比模型的破坏形态。研究结果表明,排架的关键破坏特征为中间承重柱的倾覆转动;数值计算与试验破坏形态吻合较好,特征位移和特征转角的最大相对误差分别为5.6%和4.6%。以承重柱的倾覆角作为划分依据,将计算结果分为3种破坏等级,拟合得到的超压-冲量曲线和药量-距离曲线可用于厂房安全距离和仓库容量设计以及意外爆炸下的破坏程度预估。 展开更多
关键词 钢筋混凝土排架 爆炸 破坏等级 超压-冲量曲线 缩比模型 CONWEP
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Simplified theoretical analysis and numerical study on the dynamic behavior of FCP under blast loads 认领
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作者 Chunfeng ZHAO Xin YE +2 位作者 Avinash GAUTAM Xin LU YLMO 《结构与土木工程前沿:英文版》 SCIE EI CSCD 2020年第4期983-997,共15页
Precast concrete structures have developed rapidly in the last decades due to the advantages of better quality,non-pollution and fast construction with respect to conventional cast-in-place structures.In the present s... Precast concrete structures have developed rapidly in the last decades due to the advantages of better quality,non-pollution and fast construction with respect to conventional cast-in-place structures.In the present study,a theoretical model and nonlinear 3D model are developed and established to assess the dynamic behavior of precast concrete slabs under blast load.At first,the 3D model is validated by an experiment performed by other researchers.The verified model is adopted to investigate the blast performance of fabricated concrete panels(FCPs)in terms of parameters of the explosive charge,panel thickness,and reinforcement ratio.Finally,a simplified theoretical model of the FCP under blast load is developed to predict the maximum deflection.It is indicated that the theoretical model can precisely predict the maximum displacement of FCP under blast loads.The results show that the failure modes of the panels varied from bending failure to shear failure with the mass of TNT increasing.The thickness of the panel,reinforcement ratio,and explosive charges have significant effects on the anti-blast capacity of the FCPs. 展开更多
关键词 precast structure fabricated concrete panel blast resistance theory model empirical equation
Numerical simulation of the blast wave of a multilayer composite charge 认领
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作者 Xiao-wen Hong Wei-bing Li +2 位作者 Wei Cheng Wen-bin Li He-yang Xu 《Defence Technology(防务技术)》 SCIE EI CAS CSCD 2020年第1期96-106,共11页
The numerical simulation of a blast wave of a multilayer composite charge is investigated.A calculation model of the near-field explosion and far-field propagation of the shock wave of a composite charge is establishe... The numerical simulation of a blast wave of a multilayer composite charge is investigated.A calculation model of the near-field explosion and far-field propagation of the shock wave of a composite charge is established using the AUTODYN finite element program.Results of the near-field and far-field calculations of the shock wave respectively converge at cell sizes of 0.25-0.5 cm and 1-3 cm.The Euler--fluxcorrected transport solver is found to be suitable for the far-field calculation after mapping.A numerical simulation is conducted to study the formation,propagation,and interaction of the shock wave of the composite charge for different initiation modes.It is found that the initiation mode obviously affects the shock-wave waveform and pressure distribution of the composite charge.Additionally,it is found that the area of the overpressure distribution is greatest for internal and external simultaneous initiation,and the peak pressure of the shock wave exponentially decays,fitting the calculation formula of the peak overpressure attenuation under different initiation modes,which is obtained and verified by experiment.The difference between numerical and experimental results is less than 10%,and the peak overpressure of both internal and external initiation is 56.12% higher than that of central single-point initiation. 展开更多
关键词 Structure of COMPOSITE CHARGE INITIATION mode BLAST wave Cell size in calculation NUMERICAL simulation
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Global gene expression profiling of blast lung injury of goats exposed to shock wave 认领
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作者 Hong Wang Wen-Juan Zhang +6 位作者 Jun-Hong Gao Jin-Ren Liu Zhi-Yong Liu Bao-Qing Xia Xiao-Lin Fan Cun-Zhi Li Ai-Rong Qian 《中华创伤杂志:英文版》 CAS CSCD 2020年第5期249-257,共9页
Purpose:Blast lung injury(BLI)is the most common damage resulted from explosion-derived shock wave in military,terrorism and industrial accidents.However,the molecular mechanisms underlying BLI induced by shock wave a... Purpose:Blast lung injury(BLI)is the most common damage resulted from explosion-derived shock wave in military,terrorism and industrial accidents.However,the molecular mechanisms underlying BLI induced by shock wave are still unclear.Methods:In this study,a goat BLI model was established by a fuel air explosive power.The key genes involved in were identified.The goats of the experimental group were fixed on the edge of the explosion cloud,while the goats of the control group were 3 km far away from the explosive environment.After successful modeling for 24 h,all the goats were sacrificed and the lung tissue was harvested for histopathological observation and RNA sequencing.Gene ontology(GO)and kyoto encyclopedia of genes and genomes(KEGG)analysis were performed to identify the main enriched biological functions of differentially expressed genes(DEGs).Quantitative real-time polymerase chain reaction(qRT-PCR)was used to verify the consistency of gene expression.Results:Of the sampled goat lungs,895 genes were identified to be significantly differentially expressed,and they were involved in 52 significantly enriched GO categories.KEGG analysis revealed that DEGs were highly enriched in 26 pathways,such as cytokine-cytokine receptor interaction,antifolate resistance,arachidonic acid metabolism,amoebiasis and bile secretion,JAK-STAT,and IL-17 signaling pathway.Furthermore,15 key DEGs involved in the biological processes of BLI were confirmed by qRTPCR,and the results were consistent with RNA sequencing.Conclusion:Gene expression profiling provide a better understanding of the molecular mechanisms of BLI,which will help to set strategy for treating lung injury and preventing secondary lung injury induced by shock wave. 展开更多
关键词 Blast lung injury Shock wave Differentially expressed genes RNA sequencing TRANSCRIPTOME
Responses of HFR-LWC beams under close-range blast loadings accompanying membrane action 认领
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作者 Wan-xiang Chen Li-sheng Luo +1 位作者 Zhi-kun Guo Peng Yuan 《Defence Technology(防务技术)》 SCIE EI CAS CSCD 2020年第6期1167-1187,共21页
The load-carrying capacities and failure patterns of reinforced concrete components can be significantly changed by membrane effects.However,limited work has been carried out to investigate the blast resistance of Hyb... The load-carrying capacities and failure patterns of reinforced concrete components can be significantly changed by membrane effects.However,limited work has been carried out to investigate the blast resistance of Hybrid Fiber Reinforced Lightweight Aggregate Concrete(HFR-LWC)members accompanying membrane action.This paper presents a theoretical approach to quantitatively depicting the membrane behavior and its contribution on the behavior of HFR-LWC beams under close-range blast loadings,and the suitability of the proposed model is validated by a series of field tests.An improved Single-Degree-of-Freedom(SDOF)model was employed to describe the dynamic responses of beam-like members under blast loadings accompanying membrane action,where the mass-load coefficient is determined according to the nonuniformly distributed load induced by close-range explosion,and the membrane action is characterized by an in-plane(longitudinal)force and a resisting moment.The elastoplastic and recovery responses of HFR-LWC beams under the combined action of blast load and membrane force were analyzed by the promoted model.A specially built end-constrain clamp was developed to provide membrane action for the beam member when they are subjected to blast load simultaneously.It is demonstrated that the analytical displacement-time histories are in good agreement with experimental results before peak deflections and that the improved SDOF model is an acceptable tool for predicting the behavior of HFR-LWC beams under blast loadings accompanying membrane action. 展开更多
关键词 Blast load Membrane action HFR-LWC beam Dynamic response Experimental study
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内蒙古地区非天然地震的特征与识别 认领
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作者 徐岩 张珂 +2 位作者 倪铭 王勇 郝美仙 《地震地磁观测与研究》 2020年第4期42-48,共7页
基于2014年以来内蒙古测震台网观测报告,对所记录的非天然地震事件进行统计分析。提出了区分天然地震与非天然地震的一般方法。从地震事件的三要素、波形、频谱等方面对比分析内蒙古地区非天然地震与天然地震间的差异发现,内蒙古地区非... 基于2014年以来内蒙古测震台网观测报告,对所记录的非天然地震事件进行统计分析。提出了区分天然地震与非天然地震的一般方法。从地震事件的三要素、波形、频谱等方面对比分析内蒙古地区非天然地震与天然地震间的差异发现,内蒙古地区非天然地震具有发震时刻与发震位置较固定与集中、震级ML<3.5、面波较发育、能量衰减较快、优势频率主要集中在1—6 Hz等特征。并通过对比内蒙古不同地区典型震例,进一步总结出内蒙古地区非天然地震的地方性特征。研究结果有利于提高内蒙古地区非天然地震的识别能力,可为今后开展该区非天然地震自动识别研究提供基础资料。 展开更多
关键词 非天然地震 爆破 塌陷 波形 频谱
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Resistance Evaluation of Dominant Varieties against Rice Blast (Magnaporthe oryzae) and Bacterial Blight (Xanthomonas oryzae pv. oryzae) in Guangzhou, China 认领
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作者 Yang Jianyuan Feng Aiqing +4 位作者 Chen Shen Li Chuanying Yang Qiyun Zeng Liexian Zhu Xiaoyuan 《Plant Diseases and Pests(植物病虫害研究:英文版)》 CAS 2020年第3期1-2,5,共3页
The resistance of dominant rice varieties in Guangzhou against rice blast(Magnaporthe oryzae)and bacterial blight(Xanthomonas oryzae pv.oryzae)were evaluated by artificial inoculation and field natural blast nursery i... The resistance of dominant rice varieties in Guangzhou against rice blast(Magnaporthe oryzae)and bacterial blight(Xanthomonas oryzae pv.oryzae)were evaluated by artificial inoculation and field natural blast nursery identification.Among 11 varieties tested,seven varieties showed resistance to rice blast,accounting for 63.6%;two varieties were highly resistant,accounting for 18.2%;three varieties were resistant,accounting for 27.3%;two varieties were moderately resistant,accounting for 18.2%;four varieties were susceptible(moderately susceptible),accounting for 36.4%.Varieties showed different resistance against the prevailing pathotype IV of bacterial blight;one variety was resistant,accounting for 9.1%;three varieties were moderately resistant,accounting for 27.3%;five varieties were moderately susceptible,accounting for 45.5%;one variety was susceptible,accounting for 9.1%;one variety was highly susceptible,accounting for 9.1%;all varieties tested showed susceptible to the virulent pathotype V.Huanghuazhan,Yuejingsimiao 2 and Fengxiuzhan showed resistance against both bacterial blight(pathotype IV)and rice blast,accounting for 27.3%.It is helpful to reduce the production risk by extending such dominant rice varieties with good resistance to rice blast and bacterial blight. 展开更多
关键词 Rice varieties Rice blast Rice bacterial blight Resistance
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Effects of Silicon Fertilizer on Rice Blast (Magnaporthe oryzae) Green Control, Rice Growth and Yield 认领
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作者 Lai Tiankui Deng Yuxian +3 位作者 Ge Shaobin Wang Xiumei Li Chuanying Yang Jianyuan 《Plant Diseases and Pests(植物病虫害研究:英文版)》 CAS 2020年第3期3-5,共3页
Three doses of silicon fertilizer and seven dominant rice varieties were selected to study the effects of silicon fertilizer on rice blast(Magnaporthe oryzae)green control,rice growth and yield.The results showed appl... Three doses of silicon fertilizer and seven dominant rice varieties were selected to study the effects of silicon fertilizer on rice blast(Magnaporthe oryzae)green control,rice growth and yield.The results showed application of silicon fertilizer had certain control effect on panicle blast,and was beneficial for rice growth and yield.However,application effect varied among different varieties,and application of silicon fertilizer at the dose of 225 kg/hm2 received the best effect.Applying silicon fertilizer to control rice blast is safe and environmental-friendly,which is beneficial to the production of green food production. 展开更多
关键词 Silicon fertilizer RICE Rice blast GROWTH YIELD
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