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lbfgs
This submission contains an interface to a LBFGS-code for unconstrained minimization problems of the form
min_{x} f(x) + c*| ilde{x}|,
where x are the parameters, f is a scalar valued real function, c is a positive scalar (default value=0), |.| denotes the 1-norm, and ilde{x} is some subset of the parameters x.
- 2011-12-24 15:17:00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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MMm
matlab实现计算机模拟排队论
％排队模型的计算机模拟
％排队论是一门研究随即服务系统工作过程的理论和方法
％m表示一个工作日内完成的服务顾客数
％t表示顾客的平均等待时间(err)
- 2008-12-28 15:50:45下载
- 积分：1
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PQ
说明： PQ分解法电力系统潮流计算MATLAB程序源(PQ decomposition Power Flow MATLAB program source)
- 2010-06-13 17:34:22下载
- 积分：1
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Reflectance-Spectrum-Computation-of-1D-PhC
Reflectance Spectrum Computation of 1D Photonic Crystals matlab code
- 2011-04-25 14:10:55下载
- 积分：1
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Information-hiding
基于 DCT(离散余弦变换 )域的信息隐藏算法是目前应用最广的变换域算法 ,此类算法的最大不足是嵌信息量小。通过分析 DCT域隐藏算法隐藏容量少的原因 ,提出了一种大容量的 DCT域信息隐藏算法。算法首先对载体图像进行频谱均匀化处理 ,然后对图像进行全局 DCT变换 ,并将隐藏信息嵌入到载体图像的低频 DCT系数上 ,信息嵌入采用分段量化的方法实现 ,提取隐藏信息时不需要原始载体图像。实验结果表明 ,该算法的嵌入容量大 ,不可感知性好。(Based on DCT (discrete cosine transform) domain information hiding algorithm is the most widely used transform domain algorithms, the largest of these algorithms is the lack of a small amount of information embedded. Hiding Algorithm for DCT domain by analyzing the hidden reasons for the low capacity, a large capacity of information hiding algorithm for DCT domain. Firstly, the spectrum of the carrier image homogenization, and then the image is a global DCT transformation, and hidden information embedded into the image of the low-frequency DCT coefficients, the information embedded in the methods used to achieve sub-quantization, extract hidden information without the original Vector image. Experimental results show that the algorithm embedding capacity, can not be perceived good.)
- 2021-04-06 09:29:03下载
- 积分：1
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A_method_of_MIMO_system_for_synthetic_aperture_rad
一种MIMO雷达系统的合成孔径雷达成像的方法(A_method_of_MIMO_system_for_synthetic_aperture_radar_imaging)
- 2010-05-09 18:54:44下载
- 积分：1
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Koch
该程序为在matlab环境运行，主要演示koch曲线的生成和变化。以及奇怪吸引子的2D映射情况展示(The program running in the matlab environment, the main demonstration koch curve generation and changes. As well as the strange attractors of the 2D map display case)
- 2008-03-26 10:54:03下载
- 积分：1
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high-pass-filter-design-on-Chebyshev
基于切比雪夫I型的高通滤波器设计Matlab(high-pass filter design based on the Chebyshev)
- 2011-05-04 16:17:27下载
- 积分：1
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-root-finding
数值计算方法中求解方程根的算法 亲测可用 附带注释 MATLAB源程序( root-finding)
- 2014-02-05 18:29:31下载
- 积分：1
