大位移非线性弹性理论的广义变分原理

应用半反推法（凑合反推法）推导了大位移非线性弹性理论中的二类及三类独立变量的广义变分原理,由于半反推法不用拉氏乘子,所以可以避免由于拉氏乘子引起的临界变分现象,结果证明Ｈｕ－Ｗａｓｈｉｚｕ为分原理只是二类独立变量的变发原理。     

用于电网谐波分析的抗混叠滤波器设计

根据电网谐波测试中信号分析的需要,介绍了用于电网谐波分析的抗混叠滤波器的设计原则和方法,给出了一种实用的抗混叠滤波器的设计,旨在缩小谐波分析仪的体积,降低功耗。     

Cluster randomized trials with treatment noncompliance.

Cluster randomized trials (CRTs) have been widely used in field experiments treating a cluster of individuals as the unit of randomization. This study focused particularly on situations where CRTs are accompanied by a common complication, namely, treatment noncompliance or, more generally, intervention nonadherence. In CRTs, compliance may be related not only to individual characteristics but also to the environment of clusters individuals belong to. Therefore, analyses ignoring the connection between compliance and clustering may not provide valid results. Although randomized field experiments often suffer from both noncompliance and clustering of the data, these features have been studied as separate rather than concurrent problems. On the basis of Monte Carlo simulations, this study demonstrated how clustering and noncompliance may affect statistical inferences and how these two complications can be accounted for simultaneously. In particular, the effect of the intervention on individuals who not only were assigned to active intervention but also abided by this intervention assignment (complier average causal effect) was the focus. For estimation of intervention effects considering noncompliance and data clustering, an ML-EM estimation method was employed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Fluid Flow,Heat Transfer and Inclusion Motion in a Four‐Strand Billet Continuous Casting Tundish

Inclusions in the steel in a four‐strand continuous casting tundish, billet and wire products are firstly investigated with industrial trials, and the fraction of inclusions removed in terms of total oxygen in the tundish is measured. Then the 3‐dimenional fluid flow, heat transfer and inclusion motion in the tundish are numerically simulated. The κ‐? two‐equation model is used to model turbulence. Inclusion motion and trajectories are calculated by considering drag force and buoyancy force, coupling the effect of turbulent fluctuation (Random Walk Model). The effect of strands‐blocking on the fluid flow, heat transfer and inclusion removal is studied. A new design of tundish is proposed focusing on removing more inclusions from the molten steel.     

设计模式在试验信息系统中的应用研究

从试验信息系统中的典型应用场景入手,研究分析常用设计模式的特点及其在业务软件模块中的应用,通过在应用场景中选择合适的设计模式,提高了试验信息系统软件的可复用性、可维护性和可扩展性.     

混合表情的稀疏表达分析

提出了一种混合表情的定量描述方法。基于压缩感知的理论框架,以面部特征点的Gabor小波系数为表情特征对混合表情进行了分析;利用隶属度函数定量表示混合表情中的不同组成。实验结果表明,该方法可以简单有效地表示混合表情中各基本表情的组成。     

广西浦北县80 m高钢筋混凝土烟囱爆破拆除

主要介绍了80m高钢筋混凝土烟囱定向倒塌爆破拆除的情况,阐述了烟囱的结构、爆破方案确定、爆破参数、起爆网路、安全设计和爆破效果等,为类似工程爆破设计提供参考.     

100 m高钢筋砼烟囱定向爆破拆除

以定向爆破拆除100 m高钢筋砼烟囱为工程实例,论述了烟囱爆破要合理地确定爆破切口部位、选择爆破切口形状和精确地开设对称定向窗等工程经验.     

一类广义非线性sine-Gordon方程新的显式解

将行波变换推广为一般的函数变换,给出一种改进的试探方程法.应用该方法求解一类广义的非线性sine-Gordon方程,获得了多种形式的新显式解,包括三角函数型解,双曲函数型解.     

Fatigue assessment of cut edges in high strength steel – Influence of surface quality

The influence of surface roughness on the fatigue strength in high strength steels and different cutting processes are studied. Fatigue testing is conducted on S700 and S960 material for different plate thicknesses cut in dog bone specimens using oxygen, plasma, laser and waterjet cutting. The surface roughness is measured for all specimens and residual stress measurements are carried out. Estimations of the fatigue strength are made based on the measured surface roughness and the ISO 9013:2002 standard for thermal cutting quality tolerances. The testing shows a 15–70 % increase in the fatigue strength compared to the estimation, proving a weak connection between the surface quality levels in ISO 9013:2002 and the fatigue test results. Different codes and design recommendations (IIW, EC3 and EN 13001) for fatigue strength of cut surfaces are compared with the fatigue test results which clearly shows an increased fatigue strength with enhanced quality and steel grades. However, the codes and design recommendations do not allow for any fatigue strength improvement with improved quality and increased yield strength.