有格式的

Because the equation is a various coefficients second-order parabolical partial differential equation,explicit difference formats usually have high condition for stability. Implicit difference formats have good stability,but they must calculate a set of algebraic equations,which are too complex.

由于泥沙扩散方程是一个二维变系数的抛物型方程，对于多维的方程，显格式往往稳定性要求很高，而隐格式虽然稳定性较好，但它要解大型的代数方程组，工作量也非常大，为了克服这两种格式的不足，常用ADI法求解，但仍存在一些计算量偏大等不足之处，因此构造出更好的差分格式是有必要的。

When you delete a file from Windows, Windows just mark the file as deleted in file allocation table, but the data of the file is still on your hard disk, there are many tools available which can let others easily recover your sensitive files even after you have formated the hard disk.

当您删除的文件从Windows ， Windows会只是马克档案删除，在文件分配表，但数据的档案仍然是在您的硬盘上，有许多可用的工具，可以让别人轻松地恢复您的敏感文件，即使您有格式的硬盘。

However, this district has its format shortcomings, first of all, the format is fat32 disk partition, file allocation table as a result of the expansion of the use of running faster than fat16 format hard drive partition slower; In addition, as a result of the system and some dos Early applications of this district do not support the format, so this geographical format, you can not use the old dos operating system and the application of some old software.

但是，这种分区格式也有它的缺点，首先是采用fat32格式分区的磁盘，由于文件分配表的扩大，运行速度比采用fat16格式分区的硬盘要慢；另外，由于dos系统和某些早期的应用软件不支持这种分区格式，所以采用这种分区格式后，就无法再使用老的dos操作系统和某些旧的应用软件了。

However, this district has its format shortcomings, the first partition is FAT32 disk format, file allocation table as a result of the expansion of the use of running faster than FAT16 format hard drive partition slower; In addition, as a result of the system and some dos Early applications of this district do not support the format, so this geographical format, you can not use the old dos operating system and the application of some old software.

但是，这种分区格式也有它的缺点，首先是采用 FAT32格式分区的磁盘，由于文件分配表的扩大，运行速度比采用 FAT16格式分区的硬盘要慢；另外，由于 dos 系统和某些早期的应用软件不支持这种分区格式，所以采用这种分区格式后，就无法再使用老的 dos 操作系统和某些旧的应用软件了。

The main contents of this course include: the construction, convergence, compatibility and stability of finite difference scheme of elliptic equation, parabolic equation and hyperbolic equation, the construction method and computation format of finite difference scheme of a system of partial differential equations.

本课程主要内容有：椭圆型方程的有限差分格式的构造，有限差分格式的收敛性，相容性及稳定性、抛物型方程的有限差分格式的构造，有限差分格式的收敛性，相容性及稳定性、双曲型方程的有限差分格式的构造，有限差分格式的收敛性，相容性及稳定性、偏微分方程组的有限差分格式的构造方法及有关的计算格式。

PRC support commonly used file format such as HTML, Palm effective in the PDB format support BMP, ICO, GIF, JPG, PCX, TGA, CHM文件 encountered have other graphics format support PDF file format supports ZIP compressed format support document not codecs which can be read directly on the content of encrypted ZIP support document Default passwords can be erected show its support for the arbitrary change font size, type, color, arbitrarily change the background color waterline support multiple types of support, the screen was set up to support fringe character spacing.

中华人民共和国支持常用的，如HTML，Palm公司在PDB格式支持BMP，保险公司，的GIF，JPG，PCX，热重分析的有效文件格式，CHM文件遇到有其他图形格式PDF文件格式支持支持ZIP压缩格式的支持文件，可以不编解码器予以对加密文件的ZIP支持直接预设的密码内容可以设置显示其对任意更改字体大小，类型，颜色，任意更改背景颜色水线支持支持多种类型的支持，屏幕成立了支持边缘字符间距。

Based on this, a new WENO difference scheme which based on Dispersion-Relation-Preserving relation is developed, and representative test cases with this scheme for computational aeroacoustics problems has been implemented and compared in order to test capability of wave capturing; In addition, WENO schemes generally do not converge at high order in the presence of contact discontinuity of Euler equations, so a conservative front tracking technique coupling WENO schemes and Level Set method to simulate the translating density profile is presented here, and numerical simulation with this technique for representative test case has been implemented and results show the desired accuracy.

本文研究了高阶精度加权基本无振荡格式及其在双曲守恒律方程中的应用，在此基础上作了两个方面的工作：一是针对高频声波问题构造出一种基于保色散关系的WENO有限差分格式，并对计算气动声学问题的代表性算例进行了大量数值实验，比较了该格式捕捉波数的能力；另外，针对高阶WENO格式在处理Euler方程的接触间断时精度有所降低的问题，研究了利用界面追踪技术Level Set方法和高阶激波捕捉WENO格式相结合的一种守恒追踪方法，并且给出有代表性的密度滑移面问题的算例，得到一致高阶精度的数值模拟结果。

PDF2CAD features ability to accurately reproduces PDF vector geometry in DXF format, preserves curves as splines in DXF output, preserves PDF font text as searchable and editable text in DXF output, option to merge characters into words and one-line text strings, option to outline font text to vector paths in DXF output, option to apply font name mappings during conversion, and ability to extracts embedded raster images to separate TIFF or JPEG files, referenced in the DXF output.

pdf2cad功能的能力，准确地抄录PDF格式向量几何在DXF格式，保留作为样条曲线在DXF格式输出，保存PDF格式的字体的文字作为搜索和编辑文本在DXF格式输出，可以选择合并字符的话和一网上的文字字串，选择Outline字体的文本载体的路径，在DXF格式输出，选择申请字体名称映射转换期间，有能力提取物嵌入式栅格图像分开， TIFF或JPEG文件，引用，在DXF文件输出。

By using Fourier analysis on the capability of resolution,we conclude that CSCD gives higher resolution,with respect to other symmetric finite difference methods.

从定量角度，利用Fou-rier分析方法分析了CSCD格式的分辨率，并同其他中心型差分格式比较，得出CSCD格式有较高的分辨率的结论。

The invention discloses a method for negotiating a voice encoding/decoding format in a communication system, in which a caller mobile station originates to negotiate the voice encoding/decoding format with a callee mobile station, the method comprises that: a mobile switch centre of the communication system receives an originating signal transmitted by the caller mobile station, the originating signal carries the number of the callee mobile station; a voice encoding/decoding format list which is latest used by the callee mobile station is acquired according to the originating signal in a database in which mobile station information is stored; the voice encoding/decoding format used when the caller mobile station is communicated with the callee mobile station is determined, and voice carrier of the caller mobile station and the callee mobile station is established in the voice encoding/decoding format.

本发明公开了一种通信系统中协商语音编解码格式的方法，主叫移动台始发与被叫移动台进行协商语音编解码格式，包括：通信系统中的移动交换中心接收到主叫移动台发送的始呼信号，该始呼信号中携带有被叫移动台的号码；根据始呼信号在存储有移动台信息的数据库中获取到被叫移动台最近使用的语音编解码格式列表；决定主叫移动台与被叫移动台进行通信时使用的语音编解码格式，并且以该语音编解码格式建立主叫移动台和被叫移动台的语音承载。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。