OFDM_64QAM

Gardner算法仿真源程序，适合于符号同步

调整pdf的边缘及其行间距大小。首先把pdf保存为图片，然后用此程序调整边缘或行间距大小，把修改后的图片重新整合成pdf。此软件的目的是为了kindle用户编写。因为kindle的屏幕有限，除去多余的边缘和行间距，可以使kindle读书效率更高，减少过多翻页操作。(Adjust the line spacing pdf and the size of the edge. First, save the pdf as a picture, and then use this procedure to adjust the size of the edge or line spacing, the re-integration of the modified images into pdf. The purpose of this software is to kindle the user to write. Because of the limited screen kindle, to remove the extra edge and line spacing can make reading more efficient kindle, to reduce excessive flip operation.)

本文区别于其他传统的人口预测模型，深入分析了当前中国人口的基本情况，以及 最近几年中国人口的发展情况与趋势，针对中国人口基数大、男女比例不协调、乡村人 口城镇化加速、人口老龄化日益严重等显著特点，在各年龄段生育率短期内保持不变的 假设下，建立基本的人口转移回归模型，用于模拟预测短期内中国各类人口数量发展变 化。该模型预测结果显示，中国人口在未来十几年内增长一定幅度后开始下降；与此同 时，人口老龄化、男女比例失调等问题日益严重。该模型短期内的预测效果比较好。 为了使中国将来的人口发展健康、平衡，综合考虑中国以及欧洲一些发达国家和亚 洲一些实行计划生育较早的国家以前以及当前的一些情况，本文提出了修改计划生育政 策的建议。面对日益严重的老龄化现象，我们提出生育率应该参考老龄人口比例这一新 思想，并建立生育率与老龄人口比例的关系模型，用于长期人口的预测。预测结果显示 中国总人口在短期内持续上升，在2025 年到2040 年之间基本保持在14.6 亿的最大值， 然后开始缓慢下降。 两个模型的结果均显示，中国将会面临严重的老龄化和男女比例不协调两个问题。 最后我们提出了适当措施以缓和这两个问题带来的影响。(This is different from other traditional population projection model, in-depth analysis of the current basic situation of China s population, and In recent years the development of China s population and the trend for China s huge population, gender disharmony, rural people I accelerated urbanization, the growing aging population and other significant features in the short term fertility of all ages remain unchanged Assumption, the establishment of basic population transfer regression model, to simulate and predict the short term development of China s various types of population change Of. The predicted results show that China s population growth in the next decade began to decrease after a certain extent and the same When an aging population, gender imbalance and other growing problem. The model predicted the short-term results were better. To make the development of China s future population health, balance, considering China and some developed countries in Europe and A)

无线通信中，无线信道的模型的仿真程序，比较新，希望有所帮助(wireless communications, wireless channel model simulation program, a relatively new, hoping some help)

MIMO系统研究，MIMO系统中空时分组技术的研究(MIMO systems, MIMO systems hollow packet technology)

contourlet toolbox,contour的matlaB工具箱(coutourlet toolbox, coutour of matlaB Toolbox)

StandardCell Placement Tool Using Graph Theory

说明：  迪杰斯特拉和克鲁斯卡尔算法的Matlab实现。包含dijkstra.m和Kruskal.m文件，可用matlab直接打开，添加到运行路径后即可；或者用文本打开，复制代码。(Realization of Dijster Straw Algorithms in MATLAB)

书名为《Matlab神经网络工具箱应用简介》。通过阅读这篇文档即能对Matlab中的神经网络工具箱的使用有所了解。(book entitled "Neural Networks Toolbox Matlab Application Profile." By reading this document that is able to Matlab neural network toolbox is the use of understanding.)

电网电能质量中的电压波动和闪变仿真波形；电网电能质量中的电压波动和闪变仿真波形(Power quality voltage fluctuations and flicker simulation waveforms)