排序方式： 共有10条查询结果，搜索用时 46 毫秒
1
1.
加强素质教育,优化创新人才培养模式 总被引：14，自引：0，他引：14
本文介绍了天津大学对素质教育的认识和实践，以及所取得的成效。 相似文献
2.
A maximally flat FIR filter design method based on explicit formulas combined with simulated annealing and random search was presented. Utilizing the explicit formulas to calculate the ini- tial values, the firate-word-length FIR filter design problem was converted into optimization of the filter coefficients, An optimization method combined with local discrete random search and simulated annealing was proposed, with the result of optimum solution in the sense of Chebyshev approximation. The proposed method can simplify the design process of FIR filter and reduce the calculation burden. The simulation result indicates that the proposed method is superior to the traditional round off method and can reduce the value of the objective function to 41%～74%. 相似文献
3.
Although genetic algorithm has become very famous with its global searching,parallel computing,better robustness,and not needing differential information during evolution.However,it also has some demerits,such as slow convergence speed.In this paper,based on several general theorems,an improved genetic algorithm using variant chromosome length and probability of crossover and mutation is proposed,and its main idea is as follows:at the beginning of evolution,our solution with shorter length chromosome and higher probability of crossover and mutation;and at the vicinity of global optimum,with longer length chromosome and lower probability of crossover and mutation.Finally,testing with some critical functions shows that our solution can improve the convergence speed of genetic algorithm significantly,its comprehensive performance is better than that of the genetic algorithm which only reserves best individual. 相似文献
4.
文章针对天津商学院电路分析（简称电路）课程教学的实际情况，对电路课程体系构建、教学模式的改进、实践教学环节、课程考核评价指标等方面进行了研究和探索，提出了电路课程建设与改革的方案，取得了明显的成效。 相似文献
5.
This paper presents a novel leapfrog signal flow graph （SFG） implementation by fully differential Op amp integrators, which combines low sensitivity, high dynamic range with simple circuit configuration. The direct SFG simulation and leapfrog SFG simulation can yield integrator-based structures likewise, but both of them will lead to higher circuit complexity, noise density and sensitivity. Three Butterworth 5-order high-pass filters with a pass band edge frequency of 1.778 kHz are designed based on different SFGs. From the example, the noise density of the sim- plest leapfrog configuration is approximately 0.4 nV/Hz~/2 lower than those of the other two in the stop band, and shows the best noise density in the pass band. The sensitivity densities of two types of leapfrog filters are approxi- mately equivalent, while that of the direct SFG simulation filter is much higher. However, the pass band response of the simplest configuration is not as good as those of the other two because of two parasitic zeros （at 708 kHz, -31.6 dB and 1.59 MHz, 20.55 dB） and a parasitic pole （at 4.57 MHz, 45.5 dB）. 相似文献
6.
7.
提出了用Ｍａｔｈｅｍａｔｉｃａ对电流模式电路进行符号分析的方法．利用Ｍａｔｈｅｍａｔｉｃａ强大的符号分析功能，可以极大地简化电流模式电路的符号分析．有源器件的理想模型用零泛器表示．给出了对ＣＣＩ构成的电流模式滤波器电路的分析实例． 相似文献
8.
用微程序法实现里德－索罗蒙码（Ｒ－Ｓ码）的信号处理器。为快速编码和解码，推导了检查２个错误值的公式。在解码过程中改进了钱搜索法，使搜索次数电２５６次压缩到４次，同时简化了硬件电路，提高了运算速度。为编制微程序，开发了微程序编辑软件包，该软件包能够用于Ｒ－Ｓ码信号处理器的不同格式的编程，如使用Ｒ－Ｓ码的数字音频广播（ＤＡＢ）、激光唱机（ＭＤ）及数字收录机（ＤＣＣ）等。该软、硬件电路能够用于不同格式的Ｒ－Ｓ码的检错、纠错以及误码补偿。 相似文献
9.
基于LabVIEW图形化编程语言，开发了“过程检测与仪表”教学系统。该系统实现了一机多用，可以很方便地改变软件来适应不同的需求，对输入和内存的数据能够进行一系列的数据处理和分析，同时，很容易同网络、外设及其他应用连接，实现了低成本、高功效；不仅可作为过程检测与仪表课程的教学平台，还可对生产现场的真实情况进行模拟仿真，测试实际系统的性能，较容易的找到最佳运行方案，为新产品的检测提供了平台。 相似文献
10.
对一种适用于数字电视／高清晰度电视的三维视频编码方法进行研究，给出实验结果。与人眼视觉特性相匹配，该法对低频亮度分量采用全帧速率传输以保证良好的运动显示，对高频亮度分量以降低的帧速率传输，以保证静止图像的细节。实验表明，这种编码方案简单有效，是一种有前途的编码方案。 相似文献
1