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代码，用于确定一函数是否为负半定
此代码为其找到的 E 值的范围函数 f x 3 x 2 x 1） = 2 * x 1 * x 1-2 x 3-x ^2 ^ x 3 ^2-5 * 2 2 * E * x 1 * x 2 * x 2-4 * x 3 是负半正定
- 2023-08-18 14:30:02下载
- 积分：1
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FreqzPhase
对信号进傅里叶变换，得到振幅谱和相位谱，并可画出振幅谱和相位谱。(The signal into the Fourier transform, the amplitude spectrum and phase spectrum and amplitude spectrum and phase draw spectrum.)
- 2009-01-04 21:10:40下载
- 积分：1
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imagewatermark
用MATLAB语言编写的一个完整的图像水印嵌入算法(MATLAB language with a complete image watermark embedding algorithm)
- 2009-05-03 15:46:16下载
- 积分：1
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tfa
自适应时频频分析方法，具有界面操作，参数选择等功能，可以自由调入信号获得相应的自适应视频分析方法结果。(Adaptive time frequency analysis method,It can be used to give TFR of signal.)
- 2010-01-06 22:51:00下载
- 积分：1
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matlab
Matlab图像各点坐标值和灰度值的表示，图像分割(Matlab image points coordinates and gray value representation, image segmentation)
- 2011-09-13 16:49:07下载
- 积分：1
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heart
matlab 画心形 希望有帮助 给女朋友挺好的倡议(matlab heart study and study over and over again.enjoy i dont descript this in english.)
- 2012-08-11 22:09:38下载
- 积分：1
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chapter3
知道完美信道状态信息与不知道信道状态信息的信道容量的对比(Know the perfect channel state information and does not know the channel state information of the channel capacity of the contrast)
- 2013-03-30 10:09:54下载
- 积分：1
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bowenguangheji
将波纹钢板桥涵结构简化为单位宽度的固支圆弧梁,同时考虑波纹钢板桥涵结构和土的共同作用,首次建立了该结构的计算模型,推导了该结构位移、应力的解析解.实例计算结果表明:理论计算结果和现场实测结果相当吻合.在此基础上,编制MATLAB程序,进一步分析波纹板厚、波峰高度、波长、结构半径,土体自重、侧压力系数,以及弹性模量对结构位移、应力的影响,为该结构优化设计和施工提供了理论依据.(The simplified structure of corrugated steel culvert unit width clamped circular beam, taking into account the corrugated steel culvert structure and interaction of soil for the first time to establish a computational model of the structure, the structural displacement derived analytical solution of stress. Example calculation the results show that: the theoretical calculations and field measurement results are quite consistent on this basis, the preparation of the MATLAB program, further analysis of corrugated sheet thickness, wave height, wavelength, structure radius, the weight of soil, lateral pressure coefficient, and elastic modulus of the structure. displacement, the impact of stress for the structural optimization design and construction provides a theoretical basis.)
- 2014-01-10 17:32:08下载
- 积分：1
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SpeedRegulationSystemResearchofMiningElectricLocom
矿用电机车电控系统有两种,一种是有触点的电控系统,另一种是脉冲调速系统。以晶闸管为主要元件的脉冲调速系统在矿用电机车中仍大量使用。晶闸管属于半控型器件,其控制极只能控制开通而不能控制其关断,在低速运行时,晶闸管一经导通后,如果不能根据需要关断,则电动机承受全部电压而失去控制,电机车全速运行。本文利用MATLAB软件对矿用电机车晶闸管脉冲调速系统的主电路进行建模并仿真,对影响安全运行的关键元器件进行了详细的分析。仿真结果表明晶闸管脉冲调速系统存在安全隐患。随着电子工业的飞速发展,一种新型的全控型电力器件(绝缘门极晶体管IGBT)开始在工业中得到广泛的应用,脉冲调速电控系统如采用全控型电力器件代替半控型元器件(晶闸管),将会大大简化控制电路。由于控制电路简单,便于实现数字化控制。本文对IGBT的调速原理进行分析,采用IGBT和集成PWM脉宽调制器SG3525为主要元件,设计出了双闭环可逆自动调速系统,并对该系统进行实验验证,实验结果表明该系统优于晶闸管直流调速系统,而且运行稳定,可以很方便实现可逆运行。(Mine electric locomotive electronic control system has two types of electronic control system with contacts, and the other is the pulse speed control system. The pulse thyristor as the main component in the mining electric locomotive speed control system is still widely used. A semi-controlled thyristor type devices, the control can only control a very open and can not control the turn-off, in the low speed, the thyristor turn-on once, if not turned off as needed, then the loss of the motor under full voltage control, motor vehicle running at full speed. In this paper, MATLAB software mining electric locomotive speed control system pulse thyristor main circuit modeling and simulation, the key components of the safe operation of a detailed analysis. Simulation results show that the thyristor pulse control system security weaknesses. With the rapid development of the electronics industry, a new full-controlled power devices (Insulated Gate Transistor IGBT) began to be widely used in indu)
- 2010-12-24 13:40:45下载
- 积分：1
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Matlab
这是matlab的一个入门教程，结合实例介绍了matlab在数学中的应用。(This is a Getting Started tutorial matlab, matlab introduced with examples of applications in mathematics.)
- 2009-06-30 21:34:15下载
- 积分：1
