论短跑摆腿技术的特点

近年来，随着田径运动技术水平的提高和发展，短跑的技术也有所变化，更加强调摆腿技术的重要性。摆腿的速度、力量、方向、幅度都直接影响着后蹬的效果。只有加强摆腿技术，才能更好地促进后蹬，只有提高蹬、摆的配合效果，才能更快，更好地提高运动成绩。     

滚齿切削厚度的计算

本文提出了滚齿时基面内切削厚度的计算方法．该方法可作为深入研究滚齿切削过程的理论基础．     

FRP特种航空集装箱夹层板力学行为分析

研制FRP复合材料航空集装箱,以代替原有的钢质及铝合金集装箱,同时为进一步减轻集装箱质量,采用夹层结构设计集装箱各面板;运用复合材料经典层合理论,结合基尔霍夫(Kirchhoff G)薄板小挠度弯曲理论,对复合材料夹层板进行力学行为分析,得到夹层板的弯曲控制方程,并用莱维(Levy M)矩形板单三角级数解法进行数值求解,进而得到夹层板在给定条件下的弯曲挠度,从而提供了集装箱夹层板的设计依据.     

Preparation of organic thin-film field effect transistor

The organic thin-film field effect transistor was prepared through vacuum deposition by using teflon as di-electric material. Indium-tin-oxide acted as the source and drain electrodes. Copper phthalocyanine and teflon were used as the semiconductor layer and dielectric layer, respectively. The gate electrode was made of Ag. The channel length between the source and drain was 50 μm. After preparing the source and drain electrodes by lithography, the copper phthalocyanine layer, teflon layer and Ag layerwere prepared by vacuum deposition sequentially. The field effect electron mobility of the device reached 1.1×10ˉ6 cm2/(V@s), and the on/off current ratio reached 500.     

板材辊式矫直机辊数研究

本文根据弹塑性弯曲理论，应用迭代法计算了板材一次弯曲矫直时的弯曲力矩和相应的反弯曲率，计算给定方案下形成的残余曲率，给出了压下量与反弯曲率的数学表达式．对于一定的矫直精度要求，提出了上排工作辊集体倾斜调整的辊式矫直机辊数的计算方法．     

并行广义预测自校正控制器(GPC)

本文旨在讨论ＧＰＣ算法［１，２］的并行化问题，通过对原串行算法的数据流及数据相关性的分析，得到了一种三角阵列的并行算法。该算法自然导致Ｓｙｓｔｏｌｉｃ结构，并具有良好的数值稳定性。对于一个 ｎ阶系统而言，本算法采用Ｏ（ｎ２）阶的处理器单元互连成三角阵列，可以把计算时间由原来的Ｏ（ｎ３）阶（内积运算）时间提高到 Ｏ（ｎ）阶，因而具有 Ｏ（ｎ２）的加速比，其处理器的利用效率得到了很大提高。     

CH_3COONa·3H_2O-Na_2SO_4·10H_2O截面

用步冷曲线法和DSC法测定了CH_3COONa·3H_2O-Na_2SO_4·10H_2O截面,得到了体系的多温图。结果表明,此截面的两条三次结晶水平线的温度值分别为: 液+Na_2SO_4(?)Na_2SO_4·10H_2O+CH_3COONa·3H_2O_2:18.2℃; 液+CH_3COONa(?)Na_2SO_4+CH_3COONa·3H_2O:58.1℃。     

数据包络模型的随机性研究

利用最小绝对误差估计和机会约束规划，本文研究了数据包络模型中的随机性问题，建立了一系列线性与非线性规划的数据包络模型。并对模型解的存在和鲁棒性作了讨论。     

Experimental and Parametric Design of Petroleum Back-pressured Hydraulic Impactor

Percussive-rotary drilling technology was considered many years ago as one of the best approaches for hard rock drilling. It is a key for popularizing this technology on a large scale to design and make an impactor with excellent performance. This paper presents a suit of method to design the percussive parameters for the oil or gas field by introducing the working principle of back-pressured impactor, dividing the working periods of impactor into three phases and establishing the computer emulational model of percussive parameters. It draws a comparison between the results of model calculation and experiment on the basis of analyzing the experiment results of impactor. The conclude provides credible foundation for designing and further ameliorating the impactor.     

关于集中供热系统热用户节能问题的探讨

探讨了集中供热系统热用户方面存在的问题，提出了相应的节能措施。