matlab有限元网格划分程序 DistMesh is a simple MATLAB code for generation of unstructured triangular and tetrahedral meshes. It was developed by Per-Olof Persson (now at UC Berkeley) and Gilbert Strang in the Department of Mathematics at MIT. A detailed description of the program is provided in our SIAM Review paper, see documentation below. One reason that the code is short and simple is that the geometries are specified by Signed Distance Functions. These give the shortest distance from any point in space to the boundary of the domain. The sign is negative inside the region and positive outside. A simple example is the unit circle in 2-D, which has the distance function d=r-1, where r is the distance from the origin. For more complicated geometries the distance function can be computed by interpolation between values on a grid, a common representation for level set methods. For the actual mesh generation, DistMesh uses the Delaunay triangulation routine in MATLAB and tries to optimize the node locations by a force-based smoothing procedure. The topology is regularly updated by Delaunay. The boundary points are only allowed to move tangentially to the boundary by projections using the distance function. This iterative procedure typically results in very well-shaped meshes. Our aim with this code is simplicity, so that everyone can understand the code and modify it according to their needs. The code is not entirely robust (that is, it might not terminate and return a well-shaped mesh), and it is relatively slow. However, our current research shows that these issues can be resolved in an optimized C++ code, and we believe our simple MATLAB code is important for demonstration of the underlying principles. To use the code, simply download it from below and run it from MATLAB. For a quick demonstration, type "meshdemo2d" or "meshdemond". For more details see the documentation.
标签： matlab有限元网格划分程序
上传时间： 2015-08-12
上传用户：凛风拂衣袖
switch power China IC, powerful and low cost
上传时间： 2015-09-29
上传用户：dxj1900
Evaluation of friction mechanisms and wear rates on rubber tire materials by low-cost laboratory tests
上传时间： 2016-05-16
上传用户：zz17110439
Color appearance models aim to extend basic colorimetry to the level of specifying the perceived color of stimuli in a wide variety of viewing conditions
标签： appearance Color model
上传时间： 2016-05-21
上传用户：wisewater
uniper 网络公司推出下一代中级万兆多业务边缘路由平台M120，M120多业务边缘路由平台的传输速度高达万兆，加上灵活且具成本效益的服务配置，能够帮助传统移动通讯提供商、有线运营商和大型企业更迅速的向下一代融合式IP商用及家用服务迁移。 M120基于Juniper的下一代数据包转发引擎技术I-chip。I-chip利用最新的芯片技术提升效率，令M120具备无与伦比的可扩展性和性能，能够在单一平台上支持100,000多个逻辑接口。M120为应用及用户提供更好的服务功能，并增强可扩展性，让提供商在不影响性能的情况下提高每个平台支持的服务和客户数量。这不仅提高了服务灵活性，还降低了单个用户的成本。 ,juniper_SSG,VPN,防火墙
标签： juniper_SSG VPN 防火墙
上传时间： 2016-09-02
上传用户：liulinshan2010
12V or Adjustable, High-Efficiency,Low IQ, Step-Up DC-DC Controller
上传时间： 2016-10-20
上传用户：oyjwle
A major societal challenge for the decades to come will be the delivery of effective medical services while at the same time curbing the growing cost of healthcare. It is expected that new concepts-particularly electronically assisted healthcare will provide an answer. This will include new devices, new medical services as well as networking. On the device side, impressive innovation has been made possible by micro- and nanoelectronics or CMOS Integrated Circuits. Even higher accuracy and smaller form factor combined with reduced cost and increased convenience of use are enabled by incorporation of CMOS IC design in the realization of biomedical systems. The compact hearing aid devices and current pacemakers are good examples of how CMOS ICs bring about these new functionalities and services in the medical field. Apart from these existing applications, many researchers are trying to develop new bio-medical solutions such as Artificial Retina, Deep Brain Stimulation, and Wearable Healthcare Systems. These are possible by combining the recent advances of bio-medical technology with low power CMOS IC technology.
上传时间： 2017-02-06
上传用户：linyj
12bit 低功耗DAC 数模转换器 The MAX5302 combines a low-power, voltage-output, 12-bit digital-to-analog converter (DAC) and a precision output amplifier in an 8-pin µMAX package. It operates from a single +5V supply, drawing less than 280µA of supply current.
上传时间： 2017-02-21
上传用户：ckbihu
The AP2406 is a 1.5Mhz constant frequency, slope compensated current mode PWM step-down converter. The device integrates a main switch and a synchronous rectifier for high efficiency without an external Schottky diode. It is ideal for powering portable equipment that runs from a single cell lithium-Ion (Li+) battery. The AP2406 can supply 600mA of load current from a 2.5V to 5.5V input voltage. The output voltage can be regulated as low as 0.6V. The AP2406 can also run at 100% duty cycle for low dropout operation, extending battery life in portable system. Idle mode operation at light loads provides very low output ripple voltage for noise sensitive applications. The AP2406 is offered in a low profile (1mm) 5-pin, thin SOT package, and is available in an adjustable version and fixed output voltage of 1.2V, 1.5V and 1.8V
上传时间： 2017-02-23
上传用户：w124141
Low-power Solution for DSP Intensive Audio Applications
上传时间： 2017-03-31
上传用户：arsenalcn
