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Prediction of three-dimensional elastic behavior of filament-wound composites based on the bridging model

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Defence Technology（防务技术） 2021年第2期17卷 609-616页

作者： Dong-mei Yin Bao-ming Li hong-cheng xiao National Key Laboratory of Transient Physics Nanjing University of Science&TechnologyNanjing210094China

This work provides a method to predict the three-dimensional equivalent elastic properties of the filament-wound composites based on the multi-scale homogenization *** the meso-scale,a representative volume element(RVE)is defined and the bridging model is adopted to establish a theoretical predictive model for its three-dimensional equivalent elastic *** results obtained through this method for the previous experimental model are compared with the ones gained respectively by experiments and classical laminate theory to verify the reliability of this *** addition,the effects of some winding parameters,such as winding angle,on the equivalent elastic behavior of the filament-wound composites are *** rules gained can provide a theoretical reference for the optimum design of filament-wound composites.

关键词： Lightweight design Filament-wound composites Bridging model Three-dimensional elastic properties

Electrodynamic response study on railgun launcher based on electromechanical coupling model

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Defence Technology（防务技术） 2019年第4期15卷 655-665页

作者： hong-cheng xiao Dong-mei Yin Bao-ming Li National Key Laboratory of Transient Physics Nanjing University of Science and Technology

The electrodynamic behavior of a medium caliber railgun launcher has been studied based on an electromechanical coupling model,which uses a unified modeling method for both electromagnetic and electromechanical *** model adopts a material equivalent method to simulating the sliding contact behavior for the in-bore *** embedded node encoding program during field meshing operation provides good load transfer accuracy between electromagnetic field and mechanical *** properties of in-bore magnetic field are firstly simulated and a subsequent dynamic analysis is conducted by mapping element results from electromagnetic analysis step to structure analysis *** electromechanical-elastic response of the barrel is studied under the excitation *** numerical model has shown reliability compared to experimental results.

关键词： Railgun launcher Sliding contact Dynamic properties Elastic response

Bivariate Recursive Equations on Excess-of-loss Reinsurance

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Acta Mathematica Sinica,English Series 2007年第3期23卷 467-478页

作者： Jing Ping YANG Shi hong cheng xiao Qian WANG LMAM School of Mathematical Sciences Peking University Beijing 100871 P. R. China

This paper investigates bivariate recursive equations on excess-of-loss reinsurance. For an insurance portfolio, under the assumptions that the individual claim severity distribution has bounded continuous density and the number of claims belongs to R1 （a, b） family, bivariate recursive equations for the joint distribution of the cedent＇s aggregate claims and the reinsurer＇s aggregate claims are obtained.

关键词： recursive equation R1 (a b) family excess-of-loss reinsurance

Imaging findings and transcatheter arterial chemoembolization of hepatic malignancy with right atrial embolus in 46 patients

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World Journal of Gastroenterology 2008年第22期14卷 3563-3568页

作者： hong-Yan cheng xiao-Yan Wang Guo-Li Zhao Dong Chen Department of Radiology Eastern Hepatobiliary Surgery Hospital 225 Changhai Road Shanghai 200438 China

AIM: To analyze the imaging findings of hepatic malignancy with right atrial (RA) embolus. METHODS: Forty-six patients with an embolus in the RA were diagnosed, including 44 patients with hepatocellular carcinoma (HCC), 1 patient with cholangiocellular carcinoma and 1 patient with hepatic carcinoma metastasis. The diagnosis was confirmed by clinical examination, serum α-fetoprotein and imaging. Seventeen patients underwent transcatheter arterial chemoembolization (TACE). RESULTS: On enhancement computer tomography (CT) or magnetic resonance (MR) imaging, a nodular filling defect in the RA could be easily found, with a slight enhancement in the arterial phase. The coronal images of CT or MR showed the extent of lesion. Lipiodol entered the embolus after TACE, hence reducing the speed of embolus growth. There was a survival benefit for patients receiving anticancer treatment. CONCLUSION: Patients with HCC, showing a filling defect of the inferior vena cava (IVC), hepatic vein (HV) and RA on images, can be diagnosed with RA embolus. Encroachment of the RA is very rare in patients with hepatic malignancies. Furthermore, a prolongation of survival time is found in those patients who underwent TACE.

关键词： Carcinoma Liver Neoplasm Metastasis Embolus Right atrium Computed tomography X-Ray Magnetic resonance

Synchronous left atrial myxoma and adenosquamous lung carcinoma

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Chinese Medical Journal 2013年第15期126卷 2992-2993页

作者： LIU hong-cheng CHEN xiao-feng YU Yu-ming JIANG Ge-ning Tongji Univ Dept Thorac Surg Shanghai Pulm Hosp Sch Med Shanghai 200433 Peoples R China

Atrial myxomas account for 40%-50% of primary cardiac tumors and as such are the most common primary heart tumors. Because prolapsing myxomas cause the intermittent obstruction of the valvular outflow tract during diastole, the signs and symptoms of left atrial myxoma resemble mitral stenosis. Myxoma may lead to systemic thromboembolic events from tumor fragmentation. In addition, lung carcinoma is a common tumor with highly heterogeneous malignancies.

关键词： left atrial myxoma lung carcinoma synchronous occurrence simultaneous resection

基于格子Boltzmann理论的弱胶结裂隙岩体水沙两相流特性

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煤炭学报 2017年第1期42卷 162-168页

作者：浦海倪宏阳肖成中国矿业大学深部岩土力学与地下工程国家重点实验室江苏徐州221116 中国矿业大学力学与建筑工程学院江苏徐州221116

通过格子Boltzmann方法对裂隙岩体水沙两相流动规律进行理论分析,建立裂隙岩体水沙两相流动的格子Boltzmann模型,推导了水沙两相的基本守恒方程并建立了水沙两相流动系统的控制方程,基于浸入边界法,利用欧拉点和拉格朗日点处理水沙两相... 详细信息

通过格子Boltzmann方法对裂隙岩体水沙两相流动规律进行理论分析,建立裂隙岩体水沙两相流动的格子Boltzmann模型,推导了水沙两相的基本守恒方程并建立了水沙两相流动系统的控制方程,基于浸入边界法,利用欧拉点和拉格朗日点处理水沙两相界面。通过数值模拟裂隙溃沙情况,分析了沙粒进入裂隙前后的流动形态,研究了颗粒粒径和裂隙宽度对溃沙速度的影响。借助单裂隙下的研究结果,建立上覆厚松散沙层矿井开采模型,分析裂隙发育下突水溃沙情况,发现在初始阶段,沙粒的溃入会堵塞裂隙,抑制裂隙的发育;随着水压的持续施加,大量水沙混合物开始涌入裂隙,岩体孔隙压力增大,导致裂隙迅速发育扩展,甚至会造成顶板垮落,加剧突水溃沙灾害。

关键词：格子Boltzmann理论弱胶结裂隙岩体水沙两相流突水溃沙保水采煤

Electrogenerated chemiluminescence sensor for the determination of metoclopramide using ordered mesoporous carbon for immobilizing tris(2,2'-bipyridyl)ruthenium

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Journal of Pharmaceutical Analysis 2010年第1期22卷 14-19页

作者： Shao-Heng Liu,Li-Juan Jia,Wang-Ming Lou,hong-Lan Qi,cheng-xiao Zhang Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province,School of Chemistry and Materials Science,Shaanxi Normal University,Xi’an 710062,China Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province School of Chemistry and Materials Science Shaanxi Normal University Xi'an 710062 China

A novel electrogenerated chemiluminescence(ECL)sensor for the determination of metoclopramide was developed by employing ruthenium complex as an ECL signal producer and an ordered mesoporous carbon(OMC)material as modified *** ECL sensor was fabricated by adsorption ruthenium complex into a mixture of OMC and Nafion,which showed good electrochemical and ECL *** was found that the ECL intensity of the sensor fabricated was greatly enhanced in the presence of *** on this finding,a highly sensitive and reproducible ECL method was developed for the determination of *** result showed that the ECL intensity was linear with the concentration of metoclopramide in the range from 1.0×10-10 to 5.0×10-7M and the detection limit was 3×*** ECL sensor exhibited a long-term stability and a fine reproducibility with relative standard deviation of 1.0 % for 1.0×10-10M metoclopramide in 18 continuous *** developed method has been applied to the determination of metoclopramide in tablet samples with satisfactory results.

关键词： metoclopramide pharmaceutical analysis chemical sensor electrogenerated chemiluminescence ruthenium complex

The effect of ROCK1 and ROCK2 silencing by ShRNA on apoptosis induced by hypoxia in rat cardiomyocyte

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The effect of ROCK1 and ROCK2 silencing by ShRNA on apoptosi...

第十三次全国心血管病学术会议

作者： SUN Guo-fang,LI Ju-xiang,DING Hao,hong Kui, cheng xiao-shu,cheng xiao-shu Department of Cardiology,The second affiliated hospital of Nanchang university,Nanchang 330031,China

Objective It is well known that the apoptosis of cardiomyocyte involves the development of some cardiovascular diseases, such as heart failure,coronary heart disease and so ***-regulation of ROCK1(Rho—associated coiled-coil protein kinase-1) and ROCK2 could inhibit apoptosis of a variety of ***,shRNAs targeting ROCK1 and ROCK2 were transfected into rat cardiomyocytes to inhibit the expression of ROCK1 and *** effect of ROCK1 and ROCK2 on

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半肢骨骺发育异常的MRI诊断价值

中国临床医学影像杂志 2016年第11期27卷 815-818,822页

作者：胥晓明于爱红程晓光北京积水潭医院放射科北京100035

目的：探讨半肢骨骺发育异常（Dysplasia epiphysealis hemimelica，DEH）的MRI影像表现。资料与方法：回顾性分析7例病理证实的DEH患者的临床及MRI影像资料，其中男6例，女1例，年龄1~9岁。扫描序列为常规序列及3D-VIBE序列。结果：①... 详细信息

目的：探讨半肢骨骺发育异常（Dysplasia epiphysealis hemimelica，DEH）的MRI影像表现。资料与方法：回顾性分析7例病理证实的DEH患者的临床及MRI影像资料，其中男6例，女1例，年龄1~9岁。扫描序列为常规序列及3D-VIBE序列。结果：①发病部位：7例DEH病变发生于膝关节5例，踝关节2例；2例累及单个骨骺，5例发生于多个骨骺；3例只累及肢体内侧，2例只累及肢体外侧，1例肢体内外侧均受累，1例累及肢体中央部。②合并畸形：3例合并骺早闭，其中1例同时合并骺早闭、髌骨脱位及胫骨弯曲变形；1例合并膝外翻，1例合并踝内翻。③影像表现：7例患者均可见关节周围1个或多个骨软骨性肿物，与邻近固有骨骺信号相似，软骨内骨化中心与固有骨骺融合或分离，表面软骨帽呈T1WI中等信号、VIBE序列高信号。7例DEH病变MRI检查均可清晰显示关节周围软组织的异常。结论：MRI可以清晰显示DEH病变的范围及其解剖关系，明确肿块与固有骨骺的关系，对DEH的诊断、评估以及治疗发挥重要作用。

关键词：肢畸形,先天性磁共振成像