手征等离子体波导导波控制特性的研究

应用纵向分量法推导出了完全填充手征等离子体金属圆波导的色散方程。通过数值求解完全填充手征等离子体金属圆波导的色散方程,得出了在不同条件下的几个低阶模的模式色散图。由此分析讨论了手征等离子体金属圆波导的基本传播特性并着重分析了手征导纳和外偏置磁场对完全填充手征等离子体金属圆波导的导波特性的影响并获得了有意义的结果。     

黑索今基含铝炸药烤燃实验和数值模拟

含铝（Al）炸药在烤燃过程中,Al粉会改变炸药内部传热机制从而影响炸药热反应,因此需要研究含Al炸药热反应特征。采用多点测温烤燃法,对压装黑索今（RDX）/石蜡（WAX）（96/4）炸药进行了烤燃实验,获得了炸药内部不同位置处温度变化;结合数值模拟计算,标定了RDX炸药反应动力学模型参数;分别采用多点测温烤燃法和烤燃弹法,对压装RDX/Al/Binder（60/31/9）和熔铸梯恩梯（TNT）/RDX/Al（60/24/16）两种含Al炸药进行了烤燃实验,获得了炸药内部温度变化及点火时间。建立含Al炸药热反应计算模型,计算分析了炸药热反应特征。对RDX/Al/Binder考虑了Al粉的吸热和热传导;对TNT/RDX/Al考虑了相变及多步热分解反应,并采用多组元网格单元计算法同时考虑Al粉的吸热;对炸药烤燃实验进行了数值模拟计算,通过与实验结果比较验证了计算结果的准确性。研究结果表明：Al粉的加入会加快压装RDX/Al/Binder（60/31/9）含Al炸药内部的传热速率,缩短其点火时间,降低炸药热安全性;Al粉的加入对铸装TNT/RDX/Al（60/24/16）含Al炸药的传热过程没有显著影响。     

高能固体推进剂冲击起爆特征研究

为了研究高能固体推进剂的冲击起爆行为,对推进剂进行了冲击加载下的拉氏分析实验。采用锰铜压力计测量了推进剂中不同位置的压力历程,分析了推进剂爆轰压力、爆速及爆轰成长距离等爆轰特性。采用拉氏分析实验计算模型、弹塑性流体动力学材料模型及点火增长模型反应速率方程对推进剂的冲击起爆过程进行了数值模拟。根据拉氏分析实验结果,标定了推进剂点火增长模型反应速率方程参数。     

一种ECC加密芯片抗功耗攻击研究

设计了随机掩码在ECC加密算法中的应用方法,为了降低加密芯片的功耗和面积,提高运算性能,研究设计了关键步固定值掩码算法,实验证明提出的方法在资源增加非常有限的情况下可以有效抵抗一阶差分功耗攻击.同时,其他加密算法也可参考此关键步固定值掩码算法来高效设计抗功耗攻击加密芯片.     

A Novel Human Antibody,HF, against HER2/erb-B2 Obtained by a Computer-Aided Antibody Design Method

Fully human antibodies have minimal immunogenicity and safety profiles. At present, most potential antibody drugs in clinical trials are humanized or fully human. Human antibodies are mostly generated using the phage display method (in vitro) or by transgenic mice (in vivo); other methods include B lymphocyte immortalization, human–human hybridoma, and single-cell polymerase chain reaction. Here, we describe a structure-based computer-aided de novo design technology for human antibody generation. Based on the complex structure of human epidermal growth factor receptor 2 (HER2)/Herceptin, we first designed six short peptides targeting the potential epitope of HER2 recognized by Herceptin. Next, these peptides were set as complementarity determining regions in a suitable immunoglobulin frame, giving birth to a novel anti-HER2 antibody named “HF,” which possessed higher affinity and more effective anti-tumor activity than Herceptin. Our work offers a useful tool for the quick design and selection of novel human antibodies for basic mechanical research as well as for imaging and clinical applications in immune-related diseases, such as cancer and infectious diseases.     

既有框架结构加固中隔震技术的应用解析

由于既有框架结构加固的需要，本文首先对加固技术的应用现状进行了分析，之后对隔震技术的具体应用采取了分步论述，希望对现阶段既有建筑物加固具有参考价值。     

基于空间扩散模型的重金属污染源位置的研究

基于GIS软件ArcMap对研究区域内的重金属元素浓度的空间分布进行可视化分析。通过设计各金属污染负荷指数并结合Hakanson毒性模型,利用层次分析等数据挖掘方法确定重金属元素的权重,客观高效地确定不同功能区内的综合污染指数,基于具有自修正特征的迭代算法,对每种重金属元素的污染源位置进行了仿真,结果显示该反演模型是收敛的。     

Solution of laplace equation by the method of separation of variables

Abstract

The Laplace equation, which is used to describe the problem of two‐dimensional heat conduction with appropriate boundary conditions at steady state, is solved in this work by applying the method of separation of variables. The primary objective of this work involves discussing the effects of the constant value of the separation of variables (p) and the sequential order of substituting boundary conditions on the solution. Without appropriately arranging the sequential order of substituting the boundary conditions, the solution for non‐zero constant values of separation of variables (p) can not be obtained. For a zero value for the constant of the separation of variables, the solution obtained is trivial or does not exist. Solutions in different forms are obtained by using different values for the constant of the separation of variables (p) and for the sequential orders of substituting the boundary conditions.     

Performance analysis of multi‐antenna relay communication systems with MRC

The performance of multi‐antenna relay communication systems is investigated in this letter. The source broadcasts the signal to all the relays and the destination. Decode‐and‐forward scheme is adopted at the relays, and the destination employs maximum ratio combining (MRC) technique to maximize the received signal‐to‐noise ratio. Closed‐form expressions of outage probability are derived in the MRC case and minimum routes MRC case. An adaptive grouping algorithm of relay antennas is also presented under the constraint of total antenna number. Simulation results show that the analytical curves agree with the simulated ones very well, and the performance of the proposed grouping algorithm is very close to the upper bound mentioned in other papers. Copyright © 2012 John Wiley & Sons, Ltd.