data are often used interchangeably, they are actually very different. Data is a set of unrelated information, and as such is of no use until it is properly evaluated. Upon evaluation, once there is some significant relation between data, and they show some relevance, then they are converted into information. Now this same data can be used for different purposes. Thus, till the data convey some information, t
標(biāo)簽: interchangeably are different unrelated
上傳時間: 2017-09-26
上傳用戶:cxl274287265
TPMath is a library of scientific programs written in Pascal. Available in several versions according to the compiler, it is proposed as an alternative to the famous Numerical Recipes, for which the Pascal version is no longer developed, or to the Borland Numerical Methods Toolbox which is no longer available.
上傳時間: 2015-03-06
上傳用戶:y_flin
垂直搜索(Vertical Search):也稱為專業(yè)搜索,高速、海量和精確抓取是定題網(wǎng)絡(luò)爬蟲DataScraper的強項,每天24小時每周7天無人值守自主調(diào)度的周期性批量采集,加上斷點續(xù)傳和軟件看門狗(Watch Dog),確保您高枕無憂 移動互聯(lián)網(wǎng):手機搜索、手機混搭(mashup)、移動社交網(wǎng)絡(luò)、移動電子商務(wù)都離不開結(jié)構(gòu)化的數(shù)據(jù)內(nèi)容,DataScraper實時高效地采集內(nèi)容,輸出富含語義元數(shù)據(jù)的XML格式的抓取結(jié)果文件,確保自動化的數(shù)據(jù)集成和加工,跨越小尺寸屏幕展現(xiàn)和高精準(zhǔn)信息檢索的障礙。手機互聯(lián)網(wǎng)不是Web的子集而是全部,由MetaSeeker架設(shè)橋梁 企業(yè)競爭情報采集/數(shù)據(jù)挖掘:俗稱商業(yè)智能(Business Intelligence),噪音信息濾除、結(jié)構(gòu)化轉(zhuǎn)換,確保數(shù)據(jù)的準(zhǔn)確性和時效性,獨有的廣域分布式架構(gòu),賦予DataScraper無與倫比的情報采集滲透能力,AJAX/Javascript動態(tài)頁面、服務(wù)器動態(tài)網(wǎng)頁、靜態(tài)頁面、各種鑒權(quán)認(rèn)證機制,一視同仁。在微博網(wǎng)站數(shù)據(jù)采集和輿情監(jiān)測領(lǐng)域遠(yuǎn)遠(yuǎn)領(lǐng)先其它產(chǎn)品。
標(biāo)簽: 爬蟲工具
上傳時間: 2015-03-21
上傳用戶:bcr321
Aidaohuakai( 樓主 ) 2013-8-22 11:45:24 只看該作者23307 | 41倒序瀏覽 論壇上對mpu6050的資料和討論并不多,很多壇友都說驅(qū)動失敗,老是顯示0. 以下就談?wù)勎业囊恍┭c淚的教訓(xùn): 昨天開始接觸mpu6050,在網(wǎng)上查了很多資料,下載程序,準(zhǔn)備一展身手。首先看了mpu6050中文資料,之后又看了那個mpu6050的測試程序,把這些看明白之后就開始寫程序了。我不是直接把程序復(fù)制過去,只是復(fù)制mpu6050的地址和初始化,IIC并沒有復(fù)制,就復(fù)制我上次寫的24C02的那個程序,想不到,這給了我血與淚的教訓(xùn),我原來是直接把IIC復(fù)制過來的,并沒有多留意。之后初始化mpu6050,寫入地址,讀出數(shù)據(jù),下載到單片機之后,LCD上顯示000001,我感到郁悶,之后又調(diào)試,以為是顯示不對,又寫顯示,之后又下載,結(jié)果還是老樣,這樣半天就過去了。驅(qū)動沒成功,又懷疑芯片或引腳有問題,繼續(xù)調(diào)試,也沒成功。就一一對應(yīng)地看了地址,又看了初始化,發(fā)現(xiàn)沒錯,調(diào)試還是不成功。最后干脆不接IIC總線,竟然發(fā)現(xiàn)了個天大的秘密,接不接IIC,LCD都顯示000001,我又用示波器測試波形,發(fā)現(xiàn)波形正確。在網(wǎng)上又查了別人的資料,在論壇上也很少有關(guān)于mpu6050的資料,也看了比別人的一些討論。很多壇友都說驅(qū)動失敗,老是顯示0. 沒辦法,一天就這樣過去了,今天早上,我又仔細(xì)看了程序,出乎我的想象,竟然是IIC的那個地址沒改,原來寫24C02的那個地址是a0,還是原封不動,把我嚇了一跳。把這些改過來之后,一切正常,能顯示加速度和陀螺儀。血與淚的教訓(xùn)啊,是自己不細(xì)心造成的,忘記改地址!今天早上竟然花了不到2個鐘就調(diào)出來了,驚喜之時就寫了這個分享,希望對大家有用。
標(biāo)簽: 圓點博士小四軸
上傳時間: 2015-04-14
上傳用戶:wusheng4495
第一節(jié)、samba是干什么的?它有什么用? Samba(SMB是其縮寫) 是一個網(wǎng)絡(luò)服務(wù)器,它是Linux作為本地服務(wù)器最重要的一個服務(wù),用于Linux和Windows共享文件之用;Samba可以用于Windows和 Linux之間的共享文件,也一樣用于Linux和Linux之間的共享文件;不過對于Linux和Linux之間共享文件有更好的網(wǎng)絡(luò)文件系統(tǒng) NFS,NFS也是需要架設(shè)服務(wù)器的; 2、安裝及服務(wù)操作命令 安裝samba程序非常簡單,使用rpm -q samba查看當(dāng)前系統(tǒng)是否已經(jīng)安裝了samba軟件。 如果沒有那就進入光盤,rpm -ivh *samba*.rpm即可。 仔細(xì)說下安裝的包: samba-common-3.0.28-0.el5.8 //samba服務(wù)器和客戶端中的最基本文件 samba-3.0.28-0.el5.8 //samba服務(wù)器核心軟件包 system-config-samba-1.2.39-1.el5 //samba圖形配置界面 samba-client-3.0.28-0.el5.8 //samba客戶端軟件 啟動、暫停和停止服務(wù): /etc/init.d/smb start /etc/init.d/smb stop /etc/init.d/smb restart 或 service smb start service smb stop service smb restart 第二節(jié)、由最簡單的一個例子說起,匿名用戶可讀可寫的實現(xiàn) 第一步: 更改smb.conf 我們來實現(xiàn)一個最簡單的功能,讓所有用戶可以讀寫一個Samba 服務(wù)器共享的一個文件夾;我們要改動一下smb.conf ;首先您要備份一下smb.conf文件; [root@localhost ~]# cd /etc/samba [root@localhost samba]# cp smb.conf smb.conf.bak [root@localhost samba]# vi smb.conf 或geidt smb.conf & 然后我們把下面這段寫入smb.conf中: [global] workgroup = WORKGROUP netbios name = Liukai server string = Liukai's Samba Server security = share [test] path = /opt/test writeable = yes browseable = yes guest ok = yes 注解: [global]這段是全局配置,是必段寫的。其中有如下的幾行; workgroup 就是Windows中顯示的工作組;在這里我設(shè)置的是WORKGROUP (用大寫); netbios name 就是在Windows中顯示出來的計算機名; server string 就是Samba服務(wù)器說明,可以自己來定義;這個不是什么重要的; security 這是驗證和登錄方式,這里我們用了share ;驗證方式有好多種,這是其中一種;另外一種常用的是user的驗證方式;如果用share呢,就是不用設(shè)置用戶和密碼了; [test] 這個在Windows中顯示出來是共享的目錄; path = 可以設(shè)置要共享的目錄放在哪里; writeable 是否可寫,這里我設(shè)置為可寫; browseable 是否可以瀏覽,可以;可以瀏覽意味著,我們在工作組下能看到共享文件夾。如果您不想顯示出來,那就設(shè)置為 browseable=no,guest ok 匿名用戶以guest身份是登錄; 第二步:建立相應(yīng)目錄并授權(quán) [root@localhost ~]# mkdir -p /opt/test [root@localhost ~]# id nobody uid=99(nobody) gid=99(nobody) groups=99(nobody) [root@localhost ~]# chown -R nobody:nobody /opt/test 注釋:關(guān)于授權(quán)nobody,我們先用id命令查看了nobody用戶的信息,發(fā)現(xiàn)他的用戶組也是nobody,我們要以這個為準(zhǔn)。有些系統(tǒng)nobody用戶組并非是nobody ; 第三步:啟動服務(wù)器 第四步:訪問Samba 服務(wù)器的共享; 1、在Linux 中您可以用下面的命令來訪問; [root@localhost ~]# smbclient -L //liukai或 smbclient //192.168.0.94/test Password: 注:直接按回車 2、在Windows中,您可以用下面的辦法來訪問; \\liukai 或 \\192.168.0.94 3、說明:如果用了netbiosname,就可以用“\\主機名”來訪問,如果沒用netbiosname,就不能用主機名訪問。 第三節(jié)、簡單的密碼驗證服務(wù)器 修改smb.conf文件: security = user guest account = liukai encrypt passwords = yes smb passwd file = /etc/samba/smbpasswd 然后,建立一個新用戶 useradd liukai passwd liukai 成功后,cat /etc/passwd | mksmbpasswd.sh > /etc/samba/smbpasswd smbpasswd -a liukai 這就成功地添加了一個smb用戶。 重啟服務(wù),使用這個用戶進行登錄即可。
上傳時間: 2015-05-13
上傳用戶:yangkang1192
演算法評估 用空間和時間評估演算法效能 時間複雜度(Time Complexity) 空間複雜度(Space Complexity) 效能評估 效能分析(Performance Analysis):事前評估 效能評估(Performance Measurement):效能量測 評估時均假設(shè)處理的資料量為n到無窮大
標(biāo)簽: 演算
上傳時間: 2015-06-13
上傳用戶:18007270712
My JSP 'TeacherMain.jsp' starting page var $=function(id) { return document.getElementById(id); } function show_menu(num){ for(i=0;i
標(biāo)簽: C++
上傳時間: 2015-07-03
上傳用戶:xiyuzhu
SharpPcap c#抓包實現(xiàn)時時獲取網(wǎng)卡信息 SharpPcap tutorial: a step by step guide to using SharpPcap The text of this tutorial is taken directly from WinPcap's official tutorial but is modified to show the C# use of the SharpPcap library. All examples can be downloaded together with SharpPcap source code from SharpPcap 's homepage. The WinPcap library must be installed before attempting to run any of these examples, so please download and install the latest version from WinPcap's download page. SharpPcap was written and tested using .NET v1.1 and Windows 2000/XP. I have no idea about other .NET and Windows versions. If you do try it, please report your results. The following topics are covered in this tutorial: Obtaining the device list Obtaining advanced information about installed devices Opening an adapter and capturing packets Capturing packets without the event handler Filtering the traffic Interpreting the packets Handling offline dump files Sending Packets Gathering Statistics on the network traffic 1. Obtaining the device list
標(biāo)簽: SharpPcap c#抓包 獲取網(wǎng)卡信息
上傳時間: 2015-07-06
上傳用戶:muzongda
matlab有限元網(wǎng)格劃分程序 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.
標(biāo)簽: matlab有限元網(wǎng)格劃分程序
上傳時間: 2015-08-12
上傳用戶:凜風(fēng)拂衣袖
DLMS 編輯 本詞條缺少名片圖,補充相關(guān)內(nèi)容使詞條更完整,還能快速升級,趕緊來編輯吧! 配電線報文規(guī)范(Distribution Line Message Specification) [IEC 62056-53]是應(yīng)用層規(guī)范,獨立于應(yīng)用層以下的各個低層,因而也就與通信信道無關(guān),設(shè)計用于在計算機集成環(huán)境中支持與(能量)分配設(shè)備間的消息交換,是由IEC TC57建立并以IEC 61334-4-41發(fā)布的國際標(biāo)準(zhǔn)。 中文名 配電線報文規(guī)范 外文名 Distribution Line Message Specification) 建立者 IEC TC57 應(yīng)用領(lǐng)域 于抄表、遠(yuǎn)程控制以及增值服務(wù)等 這個概念被進一步發(fā)展成為設(shè)備語言報文規(guī)范,其目的在于為結(jié)構(gòu)化建模和儀表數(shù)據(jù)交換提供一個互操作環(huán)境,支持任何能量類型如電、水、氣或熱的計量,應(yīng)用于遠(yuǎn)程抄表、遠(yuǎn)程控制以及增值服務(wù)
標(biāo)簽: IEC62056 DLMS COSEM
上傳時間: 2016-04-07
上傳用戶:auqaiss
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