模数的

The research about the subject largely developed and extended the classical results about homological algebra.The theory of relative homological dimensions of modules and rings are the main research field in the subject.

关于这门学科的理论研究，极大的丰富和发展了同调代数的经典结果，而环与模的相对同调维数理论是相对同调代数这一门学科的重要研究领域。

The paper first discusses the programming principles of how to exploit the parallelism underlying in sequential programs with the Parallel Programming Interactive Environment, explains the designing methods of the major functions and tools integrated in the PROFPAT (the PROgramming environment for the Fortran PArallel Transformer), and demonstrates its initial application process by the practice of interactive dependence analysis, loop parallelization, array privatization and unimodular transformation.

首先，本文从理论上深入探讨了如何借助并行程序设计交互环境帮助程序员分析和利用潜藏于串行程序中的并行性的原理，详细介绍了并行程序设计环境PROFPAT中集成的主要功能和主要工具的设计实现方法，并结合交互相关性分析、交互循环并行化变换、交互数组私有化变换、交互幺模变换等程序并行化分析、变换的初步应用实践，说明了这些工具和功能的应用方法。

This paper systematically researched this sort of nonuniformly sampled signals'digital spectrum structure, signal-to-noise ratio , the response of D/A converter with nonuniformly sampled signals, the algorithm for estimating timing offsets, the relationship between the discrete time expression of the total energy and the continuous time expression, the estimation of the average power, the algorithm of recovery and application in designing and analyzing the digital waveform synthesizer.

本文全面系统地研究了这类周期性非均匀采样信号的数字谱结构，信噪比表达式，数模转换器对非均匀采样信号输入的响应，误差校正算法，时域与频域的能量对应关系，对功率测量的影响，内插恢复算法，以及在设计和分析数字波形合成器中的应用。

Obtains after the number/mold transformation as well as the filter needs the signal the profile, his table look-up synthetic waveform method may have the random profile request satisfiedly.

经数/模转换以及滤波后得到所需信号的波形，他的查表合成波形的方法可以满足产生任意波形的要求。

In this paper, a nounal test with table L9(34) has been ed for a new type of flap rudder s, and put forward some regression formulae of hydrodynamic performance,such as rudder normal force derivahve fa, the critical angle of attack ah and rudder nounal force coefficient CN, these formulae had been validated by the flap rudder in 9000t cement - carrier ship.

本文通过对新型襟翼舵舵模的L9（34）正交试验研究，给出一套包括襟翼舵法向力导数fα、临界攻角α和法向力系数CN的回归公式，并经9000吨自卸式水泥船新型襟翼舵舵力试验验证，表明计算公式对同类型的襟翼舵是完全适用的。

On the basis of the studied shaping laws, the effects, which the sizes of the cathode surfaces in the EC perforation and cutting have on the machining rate and electrolyzing current, are analyzed in detail.

针对水平井系统的结构特点，对电化学射孔器和切割工具的结构分别进行了设计，并且根据所建的数模，着重分析和讨论了射孔和切割两种加工阴极的型面大小对加工电流和加工速度两方面的影响。

Based on the analysis of the development process of industrial organization, this article explores the reasons for co-existence of oligopolies and middle and small businesses in the structure of well-developed industrial organization, and the reasons of dominance alternate within an industry.

但目前寡头垄断已成为产业组织结构的主流。本文展示数模，在分析产业组织发展过程的基础上，阐释了成熟产业的产业组织结构为何是寡头垄断与中小企业并存以及产业内部寡头更迭的原因。

A mathematical model for the relationship between the softening point and composition is established by analyzing the composition of the ISP sinters, which has considerably facilitated the observation of the sinters' metallurgical properties, and provided a basis for controlling the operation parameters of ISF.

通过对烧结块的成分分析，建立软化点与成分的数模关系，直观了解烧结块冶金性能的变化，为密闭鼓风炉技术参数的控制提供重要的生产依据。

Combined with dumm y damping parallel circuit,the voltage prediction can eliminate partially the sam pling tim e delay of input and output data transfer thus resulting in current noise reduction and a numerical stability im provement,which can achieve an overall simulation stability in steady and transi...

利用电压预测技术，结合&虚&阻尼并联支路，可以有效地减小接口电流噪声，提高 RTDS数值计算稳定性，保证数模接口在稳态和暂态仿真中的稳定。各 AC/DC接口的电压预测步长需独立精心选择，典型值在 1个～ 3个步长，取决于直流平波电抗值的大小和直流输电线的长度。文中给出了接口的技术实现和性能校验结果。

The beam widt h of t his equivalent basic mode is measured by including 98 % of t he beam energy , and t his is an effective way to calculate t he beam quality parameter.

对于工业用大功率固体激光器，输出激光功率较大，达数千瓦；为满足加工过程对不同功率的需要，输出功率有较大的范围，从额定功率到额定功率的 10 %；输出激光的模式为多模，光束质量随着输出功率的增加而变化。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。