readstft1014

说明：  里面有33个在中国知网和其他学习网收集的论文，里面都是语音端点检测的学术论文，对于要进行语音处理的人有很高的价值。(paper from cnhk,about speech endpoint detection. have a high value)

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)

Modal Analysis in this code you can enter the K abd M matrix an then finde the frequency and mode shape with their figures

This code is about Digital Signal Processing.

这个是关于小波变换，对图像增强介绍的文章，共大家参考研究、使用。(This is the wavelet transform, image enhancement described in the article on the total of your reference and use.)

高斯脉冲波源下的磁偶极子场的计算，并与fdtd法进行了比较(The analytical solution to the Hertzian Dipole (with a Gaussian pulse source) problem for comparison with the FDTD simulation.)

用matlab 实现强噪声中弱信号的提取，可产生图像 一次生成(Using matlab to achieve strong noise in the extraction of weak signal can produce a generation of images)

Elman neural network prediction Mackey-Glass serie

说明：  谱减法的测试程序，能够测试谱减法的去噪能力以及相关信息。(Spectral subtraction of test procedures to test spectral subtraction denoising and related information)

说明：  1/3倍频程的实现，先fft然后计算上下限频率。(The realization of 1 / 3 octave, FFT first and then calculate the upper and lower frequency.)