wlbml02110612的博客

一种快速查询多点DS18B20温度的方法--铭正同创的笔记 引言 为了满足实时性要求较高系统的设计需求，针对串联多个器件在一线制总线上的结构导致的在查询多点温度时速度缓慢的问题，北京铭正同创科技有限公司提出了一种快速查询多点温度的解决方案。本方案以Dallas公司开发的一线制数字温度传感器DS18B20为核心，通过采用每个并行端口上连接一个DS18B20器件，实现同时对多个DS18B20进行同步操作的方法。本方案可广泛应用于各种工业控制、仪器仪表产品中。 关键字 快速多点温度查询 工业控制 仪器仪表 铭正同创 ...

影子系统2009破解版及使用方法 病毒、木马、恶意软件、误操作等等，你多长时间就需要重新安装一次操作系统。你是不是正在为每次的重新安装而头疼?也许对计算机稍熟悉一些的朋友会使用Ghost备份系统，这样当系统损坏、崩溃之后就可以在几分钟之内恢复。 即便是使用Ghost，还是很麻烦，特别是在系统无法引导的时候还需要使用系统安装盘引导系统至DOS状态，然后再恢复。如果今天告诉你有一种可以让系统“永生”的方法，你相不相信呢?不管你信不信，但事实证明，这样的“好日子”已经来临，使用PowerShadow，你再也不用为病毒、木马等问题而苦恼了。 使用PowerShadow可以构建现有操作系统的虚拟影像，即影子模式(shadow mode)，它和真实的系统完全一样，用户可随时选择启用或者退出这个虚拟影像。用户进入影子模式(shadow mode)后，所有操作都是虚拟的，不会对真正的系统产生影响，一切改变将在退出Shadow模式后消失。因此所有的病毒、木马程序、流氓软件都无法侵害真正的操作系统，它们的所有操作都只是假象。PowerShadow提供两种保护模式，一种为“单一阴影”模式，只保护系统分区，对系统分区的所有操作在退出影子模式或重启系统后消失，但保存在其它分区的资料可以保存。另一种为“完全阴影”模式，提供对整个硬盘分区的保护，在所有分区上的操作及保存的资料均会在退出影子模式或重启系统后消失。

因特网时间同步软件 可选择多个同步服务器 支持开机启动并自动对时，很方便

绘图助手v1.0破解版 可画电路原理图，流程图，结构图等，操作简单，别专业软件更容易，更节省时间

word to pdf软件，word转成PDF tilly pdf，一秒种安装 使用方法：打开WORD后，点击“菜单”、打印，在打印机列表中选择“TILLY pdf ”即可输出PDF格式文件。很方便哦！

pdf解密，为你排忧解难 超小，绿色...

PPT转DOC，绿色好用 ppt Convert to doc，20kb

PDF转DOC，绝对绿色好用 pdf Convert to doc

好用的图片拼接软件 可把两幅图相似的地方拼接起来，给照片处理带来很大的方便。

极品私人密盘_3.0.0免费版 可创建并隐藏个人分区

BooX Viewer [PDG绿色阅读器] BooX Viewer [PDG绿色阅读器]

类似千千静听的小型播放器 可播放音乐和视频 支持歌词显示，透明度和皮肤等 只有400KB哦，播放时占用系统资源极少。

超级记事本Notepad 支持ASCII和 UNICODE 编码 可以自动识别C,C++,C#,JAVA,VB,CSS,PHP,ASP等所有编程人员所用的语言。

史上最小的播放器[CHKenPlayer] 绝对最小，可播放音乐和视频等。

单片机教程 1.C51单片机C语言入门教程—磁动力工作室 2.单片机的C 语言轻松入门 3.单片机的C语言应用程序设计(马忠梅) 4.单片机的C语言应用程序设计 5.编程修养

数控直流电源 基于STC12C5A60S2的数控直流电源系统 设置并电压、电流等参数 LCM1602显示

网站设计工具 logo制作软件 动画制作软件

CMOS和CMOS电池电路图 CMOS电池电路图及CR2032电池资料

MzLH03 12864液晶显示程序及资料 /* 液晶驱动程序 Beta1.2 */ #include<STC51.h> #include<intrins.h> /*参数定义*/ #define BEIGUANG 60 //设置背光灯亮度 sbit SPI_RES = P2^0; //定义RESET接P2.0端口 sbit SPI_CS = P2^1; //定义CS接在P2.1端口 sbit SPI_BUSY = P2^2; //定义BUSY接P2.2端口 sbit SPI_SDA = P2^3; //定义SDA接在P2.3端口 sbit SPI_SCK = P2^4; //定义SCK接在P2.4端口 .......

BlueLab-3.6.2-release 蓝牙集成开发环境XIDE，类似vc界面，开发方便易用。

Windows下的UNIX环境Cygwin 一、简介 Cygwin是一个在windows平台上运行的unix模拟环境，是cygnus solutions公司开发的自由软件（现已被Redhat收购）。Cygwin是一个全功能的Win32应用，它是UNIX应用的一个Porting层，完全兼容于Win32(包括目前使用的Windows 95/98/NT)。该项目启动于1995年，主要目的是将GNU开发工具移植到Win32系统上来。 SFU（即Services for UNIX 3.5）由微软开发的允许Windows和UNIX的计算机之间共享数据、安全信任。SFU的主要目的要提供对使用者、管理者和开发者克服在 UNIX 和Windows之间的互通性工具，允许企业信息资源在它们之间无缝地分享。对资源的访问取决于企业的安全策略。 二、费用 Cygwin可免费下载使用，SFU从3.5版开始免费提供下载。 三、CYGWIN特点 　　对开发人员来说，Cygwin为开发者提供了一个全32位应用的开发工具。首先，可以将Cygwin看作一组工具集，它是从目前被开发人员广泛使用的GNU开发工具移植而来的，可以在Windows 9x/NT上运行。利用Cygwin工具集，开发人员，可以直接使用UNIX的系统功能调用及程序所需的一些运行环境。 　　程序员可以直接在Windows环境下调用标准的Microsoft win32API，同时也可以使用Cygwin API来编写Win32的控制台应用、GUI应用。使用Cygwin可以容易地将一些重要的UNIX应用移植到Win32 环境下。这些应用的源码不需要大改动就可以在Windows环境下运行。 　　熟悉 Windows环境的用户，可以将Cygwin理解为Dynamic-Linked Library (DLL)，它提供大量UNIX系统调用。目前最新的release 中包含了除setuid 和mkfifo外的所有POSIX.1/90的调用、全部ANSI C 标准调用,同时还包含了许多通用BSD 和SVR4服务，如：Berkeley sockets等。 　　对普通用户而言，Cygwin提供了一组UNIX工具，运行它，可以将你的Windows系统变成一部UNIX主机。这组工具中包括bash shell，你可以在一个模拟的UNIX环境下使用这些工具，或者不进入UNIX虚拟机环境，直接在Windows的DOS命令行环境下使用它们。

1.启用系统还原 2.启用系统还原并打开它 3.启用系统还原并打开它 4.启用系统还原并做一个还原点 5.启用系统还原并做一个还原点 6.一键创建还原点

1.(仅供备用)打开硬盘各分区的默认共享(原版XP系统就是开的) 2.(仅供备用)禁止硬盘各分区的默认共享 3.关闭局域网共享 4.关闭局域网共享 5.开通局域网共享(访问本机无需验证即可进入) 6.开通局域网共享(访问本机无需验证即可进入) 7.开通局域网共享(访问本机要填用户名和密码) 8.为什么要这样做？

Vista界面风格快速转换(或还原) 快速，优美，不占用系统资源（内存和CPU），完全绿色

芯片查询大全V2.3(芯片替换查询) 本软件在XP sp3系统及以前系统都测试过，可以正常使用。 1.运行 芯片查询大全(Datasheet改进版).exe 2.选择查询的网站（datasheet5，21IC，ICpdf ，芯片替换等） 3.输入 芯片名称,点击“搜索”或回车，进入搜索结果页面 3.点击右侧 PDF 图标，即可下载PDF资料。 4.点击 元件名称时，会以IE浏览器查看更详细的结果。 优点： 1.Datasheet5升级版.exe内存占用较大，约20MB，这个很小，只有1M左右 2.输入后，回车直接查询 3.退出后自动释放内存,并进行内存优化，更节省系统资源 4.增加了COMCTL32.OCX控件，不再提示错误，系统兼容性更好 5.多个网站同时查询，资料来源更广 6.可直接查询代换芯片，为设计提供方便 本软件个人编写，只为同行提供方便，欢迎提出宝贵意见和建议 ********************************************************************* ************ *************** ************ 万禄兵 *************** ************ QQ： 524884844 *************** ************ 时间：20090919 *************** *********************************************************************

注意：此版本为1.2版，使用中肯会提示错误，请下载最新的V2.3版即终极优化版，更为方便，多个网站同时查询，有问题的话与本人交流，压缩文件内部的TXT内有我的QQ. 芯片查询大全V1.2内存优化版 本软件在XP sp3系统及以前系统都测试过，可以正常使用。 1.运行 芯片查询大全(Datasheet改进版).exe 2.输入 芯片名称,点击“器件查询”或回车，进入搜索结果页面 3.点击右侧 PDF 图标，即可下载PDF资料。 4.点击 元件名称时，会以IE浏览器查看更详细的结果。 这点没做好，下一版本会改进。 建议：1.把文件放在其他盘符，然后 发送快捷方式 到桌面 2.修改快捷方式的图标，压缩包里有chip图标 优点： 1.Datasheet.exe不可使用鼠标右键，这个可以 2.Datasheet.exe不可回车，这个可以 3.退出后自动释放内存,并进行内存优化，更节省系统资源 4.比“芯片查询大全(Datasheet改进版)”更小，只有40kb 5.增加了COMCTL32.OCX控件，不再提示错误，系统兼容性更好 ********************************************************************* ************ *************** ************ 万禄兵 *************** ************ QQ： 524884844 **************

芯片查询大全V1.2使用说明 本软件在XP sp3系统及以前系统都测试过，可以正常使用。 1.运行 芯片查询大全V1.2.exe 2.输入 芯片名称,点击“器件查询”或回车，进入搜索结果页面 3.点击右侧 PDF 图标，即可下载PDF资料。 4.点击 元件名称时，会以IE浏览器查看更详细的结果。 这点没做好，下一版本会改进。 建议：1.把文件放在其他盘符，然后 发送快捷方式 到桌面 2.修改快捷方式的图标，压缩包里有chip图标 优点： 1.Datasheet.exe不可使用鼠标右键，这个可以 2.Datasheet.exe不可回车，这个可以 3.退出后自动释放内存,并进行内存优化，更节省系统资源 4.比“芯片查询大全(Datasheet改进版)”更小，只有40kb ********************************************************************* ************ 湖北汽车工业学院 *************** ************ 万禄兵 *************** ************ QQ： 524884844 ************** ************ 时间：20090619 *************** ********************************************************************

NOKIA手机原理图Nokia 5300 包括各个电路部分的原理图及参数和PCB板布局

NOKIA手机原理图Nokia 6120c 包括各个电路部分的原理图及参数和PCB板布局

包括运算放大器的设计及使用注意事项 振荡器设计 锁相环设计 AD/DA应用 滤波器设计 负反馈电路 。。。

ct. 18, 1995 v. 1.00 =========================================================================== + First release of CurveExpert 1.0. Oct. 26, 1995, v. 1.01 =========================================================================== New Features: + More attractive help file, with more keywords for searching + new help search facility available directly from CurveExpert Bug Fixes: + If a polynomial was already calculated, selecting another polynomial of a differing degree incorrectly pulled results from the cache instead of recalculating the curve fit. Fixed. + running two versions of CurveExpert is prevented, since two simultaneous instances cause stack faults. + if the data set is sorted, all interpolations are now marked invalid as they should be. + "Apply to All" did not necessarily force the current attributes of a graph to the current graph (only if the user clicks OK). Fixed. + The scrollbar did not get reset to the top when the user read in a new data file. Fixed. + The structure of the code has been undergone some major changes to ease porting to Windows 95 and Windows NT. I was exceedingly careful, but I hope this didn't introduce new bugs! :-) + For some reason, the help file didn't have any single or double quotes in it. This has been corrected, so it is now easier to read. + The help file was not terminated when CurveExpert was. Fixed. + The Window and Help menus were moved to more conventional positions on the menu bar. Nov. 4, 1995, v. 1.10: =========================================================================== New Features: + Previously undocumented logical functions can be used in the user-defined models. See the help documentation. + Current filename now appears in the title bar. + QuickCalc has been expanded to find the x-value, given the y-value. + Optimizations have been applied to many routines, making the user interface more responsive and the algorithms quicker. Changes: + File reading system has been revamped. + the color scheme on all windows now conforms strictly to the user defined system colors. + Dialogs were expunged of all Borland controls (except for buttons) since they conflicted with user defined color schemes. + The QuickCalc dialog now automatically shifts focus back to the edit control and selects all text after the OK button is pushed. This makes it easier to calculate many points at a time. Bug Fixes: + pressing the tab key to force the built-in spreadsheet sometimes added points onto the end of the data set. Fixed. + If a graph window was closed and then reopened (except after a CurveFinder operation), the comments in the Graph Info dialog were not correct. Fixed. + The Cut Last Row/Undo pair now functions properly. + The the graph of a polynomial fit would be reset if the data was changed in the data window. Fixed. + The scaling procedure did not grab the latest data out of the data window's edit control if it was active, resulting in one point not being scaled or translated. Fixed. + A constant starting with a decimal (eg, .25) caused CurveExpert to bomb (when defining a user model). This has been fixed so that these constants are accepted. + A comma-delimited data file was not read correctly. A new file reading system was implemented to read files with any type of (unspecified) delimiter between the data columns + if a data file was not read correctly, the filename in the status bar showed the unreadable file instead of the previous file. Fixed. + the common dialogs (file open/save, print) did not accept keystokes until after they were clicked with the mouse, which makes it terribly hard for non-mouse users. Fixed. + If the current path was changed from CurveExpert, the help file was not found. Fixed. Nov. 9, 1995, v. 1.11 =========================================================================== New Features: + the data point markers on graphs can now be changed to filled or unfilled circles, squares, triangles, pluses, or crosses. Changes: + Small optimizations made to the speed of the user interface + The main window is now fully resizable + The position and size of the main window is saved on exit and restored the next time CurveExpert runs Bug Fixes: + Whoops! The new file reading procedure masked out all minus and minus signs in the data, so that numbers like -10 and 10e-3 were not read correctly. Fixed. + the exception reporting dialog box did not properly draw the exclamation point's background, which should match the dialog color. Fixed. + the single-precision version still read files incorrectly sometimes. Fixed. + the initial guess dialog sometimes opened unconditionally on the next fit performed after a CurveFinder evaluation. Fixed. Nov. 13, 1995, v. 1.12 =========================================================================== New Features: + Differentiation and integration of a calculated curve fit is now supported, similar to the implementation of QuickCalc. Changes: + If background processing is enabled, during iteration the cursor is a combined arrow/hourglass to inform the user that he/she can still perform operations. + editing points in the spreadsheet is now prohibited while any iteration is taking place. + Drawing of data points on a graph is internally clipped if it is outside of the graphing window. This allows for faster graph drawing if many points are outside of the graph pane. + A separate set of application-wide defaults are maintained for the single-precision and double-precision versions (registered version only) Bug Fixes: + Periods by themselves in the user models were parsed as the value zero instead generating a syntax error. Fixed. + A plot that was copied to the clipboard failed to "clip" data points that were outside of the graphing pane, resulting in points being drawn outside of the intended area. Fixed. + The information button on a graph window would sometimes disappear if a window was sized smaller. Fixed. + After copying a plot to the clipboard, the current graph resolution was incorrectly reset to 1. Fixed. + Extremely small parameter guesses were not allowed in the parameter guess dialog, since its precision was limited to six places. Fixed. Nov. 25, 1995, v. 1.13 =========================================================================== Changes: + The data manipulation tools have now been merged into one organized, tabbed dialog. + The model analytical tools have now been merged into one organized, tabbed dialog. + Cascading a large number of windows would sometimes result in some windows being moved off of the screen. Now, the cascade restarts at the top left if a window might be moved off-screen. + The built-in models have been reordered so that operations such as calculations and window manipulations naturally fall into a grouped arrangement. + the graph autoscaling algorithm has been rewritten to be more reliable + The info button on the graphing window has been changed and moved to be less obtrusive. + sizing restrictions on the graphing windows have been removed. Bug Fixes: + Whoops! Another problem with the file reading engine caused columns starting with a negative number to be discarded. Fixed. + Entering a user model with no parameters was allowed when it shouldn't have been. Now, a syntax error is generated. + the Window|Tile command sometimes worked strangely if graphing windows had been closed prior to invoking it. Fixed. + the Window|Cascade command did not properly cascade windows that were minimized. Fixed. + the last tick and label sometimes wasn't shown on the x/y axes of plots. Fixed. + the implementation of filled points didn't produce a filled entity for the circle or triangle when printed. Fixed. + The user was still asked whether to save a file or not upon exiting, even if the file had just been saved. Fixed. + CurveExpert will now run even if ctl3dv2.dll is not found. Dec. 2, 1995, v. 1.14 (Shareware Only) =========================================================================== Bug Fixes: + Graph Attributes/Graph Scaling Dialogs were not initialized properly in the Shareware version. Fixed. Dec. 31, 1995, v. 1.15 (Not Released) =========================================================================== Changes: + Sometimes, resizing a graph would result in the line width being drawn incorrectly (not the user-specified line width, screen only). Fixed. + delayed rendering of plots is now supported, to greatly increase drawing performance with user model plots and/or plots with a large number of data points + (registered only) the single precision package has now been optimized for single-precision arithmetic + the directions on the graph window are now removed if they will be collide with the error information. This leads to cleaner plots, especially with small graphing windows. Bug Fixes: + if one minor tick was selected (on either axis), there was a chance that one too many tick labels would be printed. Fixed. + some stray (and inappropriate) directions were left on the differentiate and integrate dialogs. Removed. Jan. 14, 1996, v. 1.20 =========================================================================== New Features: + many new graphing features and easier-to-use graphing properties interface has been added + the covariance matrix and residual plot are now available in the revamped information dialog + much faster nonlinear regression performance over version 1.1 (between 17% to 45% improvement in speed, depending on the number of parameters) Changes: + each graphing window no longer appears in the Win31 tasklist; and each window no longer shows up in the Win95 taskbar. + weighting values by 1/y^2 during nonlinear regression is now implemented Jan. 25, 1996, v. 1.21 =========================================================================== Bug Fixes: + the equation bitmaps in the initial guess and/or information dialog did not update properly at times. Fixed. + if the ctl3dv2 module could not be loaded, the info dialog GPF'ed when opened. Fixed. March 5, 1996, v. 1.22 =========================================================================== New Features: + the Preferences dialog has been revamped, with many new user- defineable options added for printing, regression/math options, and application options. + added right-click menus to all main window regions Changes: + The limitation of two-line titles in metafiles has been removed. + new and improved debugging console with a nicer appearance and more information. Necessary because of the ongoing port to Win32. + a button that coordinates the foreground (frame) color and the text colors was added to the graph properties dialog + the ability to draw grid lines at each minor tick mark was added + drag-and-drop from the file manager to CurveExpert is now supported + data information dialog box was widened to accommodate large numbers. + a new and much faster data clipping algorithm is now used + clipping and sorting operations now take place in the background, instead of hogging the CPU + two new symbols added to the graphing properties dialog Bug Fixes: + if the "Weight by Y^2" option was turned on, the results of nonlinear regression were likely to be a local minima or not converge at all. Fixed. + It was not possible to put a single percent sign in an axis label without typing '%%' in the axis label edit field. Fixed. + if the graph extents were set just right on the x or y axis, then one grid line would not draw. Fixed. + if the main window was minimized when CurveExpert was exited, the window was not restored to the correct position the next time CurveExpert was run. Fixed. + a GPF occurred if a data set with over 8192 data points was sorted. Fixed. + corrected an erroneous reading of the allocated memory (in bytes) that occurred if the quadratic fit was ever used. + if a residual table of an extremely large data set was copied to the clipboard in the info dialog, a GPF occurred. Fixed. + if a large data file with very large numbers was read, the first examination of that file would cause a program abort due to an overflow. Fixed. May 20, 1996, v. 1.23 =========================================================================== New Features: + 32 BIT VERSION FOR WINDOWS 95 AND WINDOWS NT RELEASED! + added x/y averages, minima, maxima, and standard deviations to the variables available for custom regressions + added the capability to swap the x and y data + (32 bit only) new tooltips feature gives quick access to a toolbar button's function Changes: + All BWCC controls have been removed, and as a result, several dialogs were redesigned. This gives a more consistent feel to the application, eases the port to Win32, and frees CurveExpert from having the BWCC.DLL library distributed with it. + (16 bit only) draws the missing line between the toolbar and menus if running under Windows 95. + added code to properly shut down CurveExpert if the user logs off while it is running. + fit type has been added to the caption of a residual plot window to make it clear where the window originated. + even if no changes were made to the graph from the Graph Properties dialog, the plot was re-rendered. Now, a check is made to see if any changes were made to determine if the graph should be redrawn. + the help file has undergone some formatting changes and additions + support for multiple-copy printouts was added Bug Fixes: + the table-generation and export-file mechanisms printed all zeros if a number was too small. Fixed. Now, the numbers are printed properly in exponential format. + the Preferences dialog would cause a program abort if no printer was installed. Fixed. + the function that draws the graph title had a potential memory leak. This would manifest itself also in the Residual page from the information dialog. Fixed. + the path field in the application preferences dialog would not allow horizontal scrolling, so the user was limited to a short data file path name. Fixed. + the ranking chart would sometimes get corrupted during a CurveFinder operation on a small data set (at unpredictable times). Fixed. + the underline style was ignored if it was specified for a font that would appear on a graph. Fixed. + a memory leak that caused a "floating point error" in the lagrangian interpolation routine was fixed + if a x or y axis label contained more than 50 characters, a subsequent display of the plot would cause a crash. Fixed. June 2, 1996, v. 1.24 =========================================================================== Changes: + when the 32-bit version opened a help file under Win32s, it went straight to the help file contents. Now, it opens the help file contents dialog box. + while reading a file, the progress is reported in the status bar Bug Fixes: + under Windows NT, all of the tabbed dialog boxes (preferences, graph properties, graph analyze, graph information) were blank. Fixed. + the history (dump) file did not have the last iteration written to it if the iteration converged. Fixed. + CurveExpert might not detect that it is running under Win32s correctly. Fixed. + if a line in a data file started with a +, it was not recognized as a number. Fixed. November 7, 1996, v. 1.30 =========================================================================== New Features: + uncertainties (standard deviations) in each data point can now be used + built-in spreadsheet facility has been enhanced -- now looks and behaves *much* more like a spreadsheet + spreadsheet facility has multilevel undo/redo capability + cut/copy/paste of ranges in the built-in spreadsheet and between other spreadsheets (Excel, Quattro Pro, etc.) is now implemented + enhanced file import facility gives more flexibility for reading data files + a most-recently-used file list is maintained in the File menu + [32-bit, '95 interface only] Internet-aware links in the Help menu directly access the CurveExpert home page(s) Changes: + the splash screen is now drawn in the correct user-defined color, instead of being hard-coded to light gray. + the graphs now comply with the user-defined color scheme unless set explicitly by the user. + there is no longer any limit on the number of data points that can be entered manually (previously 100) + the main window now responds appropriately when certain system settings change, such as the scroll bar width + more info was added to the debugging facility + the status bar now shows what degree of polynomial is being computed + some menu items have been rearranged to form a more consistent user interface + if the file is modified, an asterisk appears beside the filename in the title bar; when the file is saved, the asterisk is removed + typing a title in the "Graph Properties" dialog now automatically deselects the "Show Header" checkbox. Bug Fixes: + certain curve fits were turned off when they shouldn't have been if zeros or negatives existed in the x data. Fixed. + strange "NAN"s would occasionally appear in the released 32-bit version. This was due to a Microsoft optimizer bug; a workaround has been implemented. + On Windows NT, if a table file was to overwrite an already existing file, CurveExpert would terminate. Fixed. + if a two-column data file had a one-column entry later in the data file, CurveExpert would crash. Fixed. + an internal error that might cause a termination while using the CurveFinder was fixed + CurveExpert would crash soon after invoking the preferences dialog, if the polynomial window was open and the degree in it did not match the selected degree in the preferences dialog + the CurveFinder tool now correctly handles polynomial calculations when the Polynomial family is selected + if a data set line began with spaces or tabs, it could be misinterpreted as having one more column than it did. Fixed. + the help button for the ArcLength page in the "Analyze Graph" dialog did not work. Fixed. + the new-style help is now used unter Windows NT 3.51 by default + if a malformed file was attempted to be read, the toolbar was (mistakenly) reenabled anyway. Fixed. + various and sundry misspellings, typos, and formatting errors have been corrected in the on-line documentation. November 18, 1996, v. 1.31 =========================================================================== Changes: + [32-bit only] Bessel functions of first and second kind added to available user model functions + ceil and floor functions added to available user model functions Bug Fixes: + [32-bit only] When installing to a WinNT 3.51 platform. no Program Manager group and icons would be created unless the user was the administrator. Fixed. + [16-bit only] If a math error occurred and was handled in CurveExpert and 3d dialogs were being used, dialogs became transparent and unusable until CurveExpert was restarted. Fixed. February 24, 1997, v. 1.32 =========================================================================== New Features: + A history page has been added to the Graphing Information dialog to give the chi-square and parameter histories for each regression. + a preview plot gives quick access to visualization of various regressions on the ranking chart Changes: + if the y column is scaled and STD data is also present, the STD data is scaled by the same factor as the y column + the ranking chart interface has been changed to mesh smoothly with the preview plot + comments in the information dialog were not available after running CurveFinder or closing/reopening a window. This data is now stored with the fit coefficients, so the comments are available at any time for a valid curve fit result + various speedups implemented in the nonlinear regression routine Bug Fixes: + when sorting data and the standard deviation column is active, the STD data would not be carried with the data point. Fixed. + if pasting more than 25 points, CurveExpert would freeze. Fixed. + Several memory and resource leaks fixed. + if an exception occurred when plotting a graph, the message stating so would be misplaced on the window/metafile/printout. Fixed. + the keyboard interface on the File Import Dialog was nonexistant. Added. + After clipping the data set, if the user tried to undo a previous action, CurveExpert would crash. Now, the undo is disabled in this situation. + When dragging and dropping a file on CurveExpert, the title of the file became "TITLE.ERR". Fixed. + when a file was opened off of the MRU menu or dropped on CurveExpert, it could not be saved to the same file. Fixed. February 26, 1997, v. 1.33 =========================================================================== Bug Fixes: + For users with an international version of Windows where the comma is used for the decimal point, CurveExpert would not read files properly. Fixed. + In help file, correlation coefficient was documented incorrectly. Corrected. March 19, 1997, v. 1.34 =========================================================================== Bug Fixes: + [16 bit only] plots with a log x axis were not plotting correctly. Fixed. + Corrections made to keyboard interface in File Import Dialog. March 1, 1998, v. 1.36 =========================================================================== New Features: + a facility to transform a column of data at a time by selected functions was added Changes: + the initial viewable state of the CurveExpert window now reacts correctly to external control of the process spawning it + a switch was added to toggle the solid line at X=0 and Y=0 on the graph + some additions and changes to the help documentation Bug Fixes: + a 19th order polynomial fit caused a crash; fixed. Jan 1, 2001, v. 1.37 ============================================================================ Changes: + updates to address and payment information June 13, 2003, v. 1.38 ============================================================================ New Features: + added setting to curves.ini file to allow international users to set the decimal point appropriately based on their locale Changes: + Updated contact information and order form

是否公式很难记，计算起来很麻烦，我来帮你搞定 RC LC 谐振的计算都可以，操作方便 附源码供学习 QQ 524884844

基于VB电阻电感并联计算器 很方便得到结果，不用再一个个输，然后一步步计算了 有源码供学习 QQ 524884844

基于VB的运放Slewrate计算器 slewrate是运放的一个很重要的参数 运用次软件可方便算出。 有源码

名称： 开关电源设计9.0 功能： 开关电源的设计，帮你选择开关电源的各个元器件参数，并作出评估，是你设计的好帮手！

VISTA风格图标美化软件 VISTA风格图标美化软件，让你拥有Vista绚丽风格的图标，磁盘图标还带有进度条，显示剩余容量。 1.自动启动软件 2.备份软件 3.美化桌面图标 注：自动启动软件可实时改变磁盘图标的进度表，很智能吧

芯片查询大全(Datasheet改进版)使用说明 本软件在XP sp3系统及以前系统都测试过，可以正常使用。 1.运行 芯片查询大全(Datasheet改进版).exe 2.输入 芯片名称,点击“器件查询”或回车，进入搜索结果页面 3.点击右侧 PDF 图标，即可下载PDF资料。 4.点击 元件名称时，会以IE浏览器查看更详细的结果。 这点没做好，下一版本会改进。 建议：1.把文件放在其他盘符，然后 发送快捷方式 到桌面 2.修改快捷方式的图标，压缩包里有chip图标 优点： 1.Datasheet.exe不可使用鼠标右键，这个可以 2.Datasheet.exe不可回车，这个可以 3.退出后自动释放内存,而Datasheet 不可以 缺点： 1.文件较大，约2.50Mb 2.弹出IE 提示错误时因为系统缺少COMCTL32.OCX，重新注册COMCTL32.OCX 开始---运行----regsvr32 COMCTL32.OCX 如果没有该文件可从网上下载，很方便的，当然过几天会有“芯片查询V1.2”，里面有COMCTL32.OCX，且更优化内存 ********************************************************************* ************ *************** ************ 万禄兵 *************** ************ QQ： 524884844 ************** ************ 时间：20090619 *************** ********************************************************************

第一篇 强制性产品认证中的电磁兼容问题 第2章 中国电磁兼容标准化情况简介 第3章 电磁兼容基本术语和标准化试验 第4章 电气和电子产品对电磁兼容测试的基本要求 5 电磁骚扰测量方法 6 设备运行对电网供电质量的影响和测量方法 7 常用产品抗扰度标准和测试方法 8 电磁兼容对策和设计 9 产品内部的电磁兼容性设计 10 电磁兼容故障的诊断与处理意见

开关电源电磁兼容及其研究新进展 Review on EMC studies of SMPS 内容 一. 开关电源技术发展面临的EMC挑战 二. 开关电源电磁干扰发射形成和传播 三. 开关电源电磁干扰发射的抑制 四. 开关电源电磁兼容研究新进展 五. 结束语

这是一个用来管理和设置Windows输入法的好帮手，和著名的系统设置软件“超级兔仔魔法设置”中的一项子功能一样，能够很容易地改变您系统中文输入法顺序，添加和删除中文输入法，修改完之后，完全不需要重启计算机，立即生效！