缩合型硅橡胶与金属的粘接研究

在以南大α系列硅烷偶联剂为基础的交联增粘体系中,引入某些γ系列硅烷偶联剂及增粘助剂,制成单组分室温硫化型粘合剂,并测定了其与铝、铜及不锈钢的粘接性能关系.研究表明:在既定的体系中加入KH-550、KH-792、WD-30以及KH-550与KH570的反应物可有效提高粘合剂对铝合金、黄铜及不锈钢的内聚破坏率,而且KH-550、KH-792还有助于改善粘合剂的贮存稳定性.     

Iterative Method for Constructing Complete Complementary Sequences with Lengths of 2^mN

Complete complementary sequences are widely used in spectrum spread communications because of their ideal correlation functions. A previous method generates complete complementary sequences with lengths of N^nN （n,N ∈ Z^＋）. This paper presents a new iterative method to construct complete complementary sequences with lengths of 2^mN （m,N ∈ Z^＋）. The analysis proves that this method can produce many sequence sets that do not appear in sequence sets generated by the former method, especially shorter sequence sets. The result will certainly increase the application of complete complementary sequences in communication engineering and related fields.     

新型红外测油仪中的液芯波导技术

首次将液芯波导技术应用于中红外吸收测量的油成分分析领域, 研制的新型MFA-450型红外测油仪的灵敏度比现有同类型仪器提高一个数量级, 检出限为0.01 mg/L(油/萃取剂).     

基于层面信息的路径优化

根据分层物体快速成型（LOM）中零件逐层累积的特点，从缩短加工时间、提高制件效率方面着手阐述了路径优化的必要性，针对LOM机的运动机理和软件数据结构，给出了扫描路径优化的原理，将图论中的便宜算法用于LOM机的扫描路径优化。     

地下室防水新技术与应用

介绍了地下室防水设计与施工新技术，并将其运用到实际工程中。结果表明，根据具体情况，地下室防水设计以防为主，阻排结合，采用刚柔结合的方法，在迎水面附加柔性防水层的设计方法是安全可靠的。     

关于极值问题的一个注记

本首先把一元函数极值从本质上推广到多元函数极值，进一步给出了以往教材中没有提到的，关于三元函数极值的有效的具体判别方法。     

多相脉冲压缩编码波形产生及压缩处理技术

由线性调频信号导出的P3、P4多相码是一类常见的脉冲压缩信号 ,这类信号具有一些有用的特性。主要研究了P3、P4多相码信号的数字波形产生及压缩处理方法 ,提出了两种基于直接数字合成 (directdigitalsynthe sis ,DDS)技术的多相码波形产生方法。分析讨论了几种降低输出旁瓣电平的压缩处理技术 ,即经典的窗函数幅度加权技术、最小二乘幅度和相位加权技术和压缩后两采样滑窗处理技术。给出了一些计算机仿真结果 ,表明了这几种压缩处理技术的有效性。     

回转式电火花展成加工的计算机仿真

介绍了回转式电火花展成加工的原理及特点，并对该加工方法的成形运动进行较深入的分析，给出了在Delphi6环境中实现加工过程的计算机仿真。     

对教育技术学实验室建设的探讨

教育技术学作为一种理论和重要教学内容的实验教学,一直支持和影响着教学质量和办学水平.根据中国教育技术学实验室20多年的建设与发展的实践经验,结合当前的技术发展水平,分析其存在的问题,对教育技术学实验室建设的可持续发展进行了探讨.     

Simulation of the diffusion process in composite porous media by random walks

A new random-walk interpolation scheme was developed to simulate solute transport through composite porous media with different porosities as well as different diffusivities. The significant influences of the abrupt variations of porosity and diffusivity on solute transport were simulated by tracking random walkers through a linear interpolation domain across the heterogeneity interface. The displacements of the random walkers within the interpolation region were obtained explicitly by establishing the equivalence between the Fokker-Planck equation and the advection-dispersion equation. Applications indicate that the random-walk interpolation method can simulate one- and two-dimensional, 2nd-order diffusion processes in composite media without local mass conservation errors. In addition, both the theoretical derivations and the numerical simulations show that the drift and dispersion of particles depend on the type of Markov process selected to reflect the dynamics of random walkers. If the nonlinear Langevin equation is used, the gradient of porosity and the gradient of diffusivity strongly affect the drift displacement of particles. Therefore, random-walking particles driven by the gradient of porosity, the gradient of diffusivity, and the random diffusion, can imitate the transport of solute under only pure diffusion in composite porous media containing abrupt variations of porosity and diffusivity.