Satellite_orbit_design

用vi传输矩阵法研究均匀布拉格光栅的传输特性(Uniform Bragg grating transmission characteristics of the transfer matrix method with vi)

计算工程热力学物性参数，主要用于MATLAB调用Refprop的 (Computational Engineering Thermodynamics physical parameters, mainly used to call Refprop of MATLAB)

基于matlab中simulink的频率合成器的设计，主要结构包括鉴相器，低通滤波器，压控振荡器(simulink based franquence synthesis,consisted of pdf,lpf,vco)

Application of spread spectrum for satellite land mobile systems is difficult in satellite link because of synchronization and providing code or considerable Doppler shift. This is particularly high for LEO satellites. So that, a Doppler shift carrying a frequency in band S can reach to several tens of kHz. To estimate and compensate Doppler, a CW pilot carrier is used. The aim of this study is simulate Doppler frequency estimation using MIMO-OFDM technique. Finally, the proposed algorithm is compared to MMSE algorithm in order to insure its performance.

autofam autofam 循环谱autofam 循环谱autofam 循环谱(autofam autofam cyclic spectrum autofam cyclic spectrum autofam cyclic spectrum)

在人们的生产活动和社会活动中常常会遇到这样的问题：经过一段时间之后，需要对具有相同类型的部门或单位（称为决策单元）进行评价，其评价的依据是决策单元的“输入”数据和“输出”数据，输入数据是指决策单元在某种活动中需要消耗的某些量，例如投入的资金总额，投入的总劳动力数，占地面积等等；输出数据是决策单元经过一定的输入之后，产生的表明该活动成效的某些信息量，例如不同类型的产品数量，产品的质量，经济效益等等．再具体些说，譬如在评价某城市的高等学校时，输入可以是学校的全年的资金，教职员工的总人数，教学用房的总面积，各类职称的教师人数等等；输出可以是培养博士研究生的人数，硕士研究生的人数，大学生的人数，学生的质量（德，智，体），教师的教学工作量，学校的科研成果（数量与质量)等等．根据输入数据和输出数据来评价决策单元的优劣，即所谓评价部门（或单位）间的相对有效性．(In people s productive activities and social activities often encounter such a problem: After a period of time, need to have the same type of departments or units (referred to as the decision-making unit) to evaluate the basis for his assessment in decision-making unit "input "Data and" output "data, input data refers to the decision-making unit in certain activities that need to consume certain amount of, for example, the total funds invested, the investment of the total workforce number, area, etc. output data through the decision-making unit After a certain input to produce the show the effectiveness of the activity of certain amount of information, such as different types of product quantity, product quality, economic efficiency and so on. Be more specific, said, for example, in evaluating a city s institutions of higher learning, the input can be the year the school funds, the total number of faculty, teaching a total area of space, all kinds of titles the number of teachers, etc)

地球不转时的星下点轨迹，回归周期1天，可自行设定(Earth does not rotate when the nadir track one day return period)

这是一个三水源新安江模型，主要用于湿润半湿润地区流域水文预报，适合从事水文、水资源方面的朋友使用。(Xin
anjiang model hydrology model di gital watershed hydrological forecasting hydrological calculation)

this is a book about how to use optimization toolbox

蒙特卡洛模拟——金融，用于股价的风险预测评估(Monte Carlo simulation - Finance, for stock price risk assessment)