基于Pro/E的三轴转台装配与运动学仿真

利用工程软件Pro／ENGINEER Wildfire对UUT型三轴转台进行了三维实体造型设计：以给定的装配序列为条件，在Pro／Animation环境中实现了转台各零部件的装配过程仿真：运用Pro／E的MDX模块，完成了给定运动条件下的转台运动学仿真，获取了反映被测试件运动情况的运动参数曲线，并对转台实施了干涉的动态检查。最后，将仿真过程中的动画输出并保存为多媒体视频文件，为转台设计方案的交流与评估以及转台产品的制造奠定基础。     

考虑动静摩擦影响的可接触型裂纹动态响应的隐式算法

提出一种考虑裂纹面摩擦影响的可接触型裂纹动力反应的时域隐式计算方法。这一方法不但可以较好地描述裂纹面间的碰撞过程及反映动接触时裂纹面间动、静摩擦力的影响，而且使动接触问题分析中的系统矩阵成为对称型式，在弹塑性有限元迭代过程中，无需增加额外的迭代即可求得较好的结果。数值结果表明本文方法具有良好的稳定性和较高的精度。     

编队飞行星座的地球扁率摄动和大气阻力摄动分析

在前一篇文章推导的运动学模型的基础上,推导了J2项摄动下编队构型在x,y,z三个方向上随时间变化的解析式,详细分析了J2项摄动对三个方向上相对距离的影响。并研究了大气阻力摄动对各轨道参数的影响,给出了几条有益的结论。     

Flatness-Based Control of Parallel Kinematics using Multibody Systems – Simulation and Experimental Results

The development of new machine tools such as parallel and hybrid kinematics leads to new challenges in the design and control of such machines in comparison to conventional ones. Parallel kinematics exhibit inherently nonlinear dynamics over the whole workspace, machine vibrations become important as a lightweight design is used and independently controlled drives become infeasible due to the parallel setup. Advanced nonlinear position control methods such as the presented flatness-based design show the potential to significantly increase the machine tool performance. In this paper simulation results are presented for a high performance machine tool and nonlinear flatness-based position control. Experimental measurements and simulation results for a test machine proof that with the nonlinear controller the trajectory error can be reduced considerably compared to the standard linear controller.     

晶体非比例双滑移的一般运动学

本文对非比例双滑移的变形规律和运动学进行了一般的数学分析。提出了双线性双滑移、逐段线性双滑移的变形梯度张量的解析公式。导出了线元切向量的变形方程以及拉伸轴在极射赤面投影图上位置变化计算公式。 对于任意形式的双滑移,本文提出了运动学分析的精确的数值积分方法。 最后结合面心立方和体心立方晶体,计算了几种典型情况下的拉伸轴旋转。     

Spectral inverse problem for q-deformed harmonic oscillator

The supersymmetric quantization condition is used to study the wave functions of SWKB equivalent q-deformed harmonic oscillator which are obtained by using only the knowledge of bound-state spectra of q-deformed harmonic oscillator. We have also studied the nonuniqueness of the obtained interactions by this spectral inverse method.     

B→ X8γ, X8l＋l- Decays and Constraints on Mass Insertion Parameters in MSSM

In this paper, we study the upper bounds on the mass insertion parameters （δAB^q）ij in the minimal super symmetric standard model. We found that the information from the measured branching ratio of B→ X8γ, X8l＋l- decay can help us to improve the upper bounds on the mass insertions parameters （δAB^u,d）3j,i3 Some regions allowed by the data of Br（B→ X8γ） are excluded by the requirement of an SM-like C7γ （rnb） imposedby the data of Br（B→ X8γ, X8l＋l- ）.     

Supersymmetric WKB Approximation of Anharmonic Potential V(r)=ar2+br-4+cr-6

This article uses the supersymmetric WKB approximation to obtain the approximate energy levels and wave functions of the anharmonic potential V(r) = ar2 br-4 cr-6 in order to tesify the correctness between [Phys.Lett. A 170 (1992) 335] and the paper written by M. Landtman [Phys. Lett. A 175 (1993) 147].     

Matrix Models and Matrix Integrals

We discuss the relations between arbitrary solutions of the loop equations describing the Hermitean one-matrix model and particular (multicut) solutions corresponding to concrete matrix integrals. These latter have a series of specific properties and, in particular, are described in terms of the Seiberg-Witten-Whitham theory. We consider the simplest example of an ordinary integral in detail. __________ Translated from Teoreticheskaya i Matematicheskaya Fizika, Vol. 146, No. 1, pp. 77–89, January, 2006.     

Nuclear fusion inside condense matters

This article describes in detail the nuclear fusion inside condense matters—the Fleischmann-Pons effect, the reproducibility of cold fusions, self-consistentcy of cold fusions and the possible applications.