iec 62056

to use. The maximum communication distance is 10 cm, which is shorter than that of UHF. Therefore, it can be used to distinguish a single item and be used for the field of individual management. Due to the use of the electromagnetic induction method, the Passive Tag of this cycle band is defined by ISO/IEC 18000-3. 3) UHF Band (860 ~ 960 MHz)The shortest meter is the week wave band with the farthest communication distance in the passive label, whi

Send a summary post for the information used in the previous period. The first is the most convincing ISO standard documentation: ISO/IEC 14496-12, coding of audio-visual objects-ISO base media file format ISO/IEC 14496-14, coding of audio-visual objects-MP4 File Format Here are a full set of standard documents related to ISO/IEC 14496 and MP4/AVC file f

program in DSP can be changed flexibly), powerful network processing capability and system control capability (rich network functions can be implemented on the MPC860, for example, you can transfer data from simple point-to-point to complex video conferencing, and you can easily and flexibly expand various applications ), therefore, there is reason to believe that the video transmission system platform built on the basis of the embedded system has broad market prospects. Of course, in the proce

JavaScript, Microsoft's JScript, and Nombas's scriptease. Unlike C and other programming languages, JavaScript does not have a standard to unify its syntax or features, and these 3 different versions highlight the problem. As the industry's fears increase, the standardization of the language is clearly imperative.StandardizationIn 1997, JavaScript 1.1 was submitted as a draft to the European Association of Computer Manufacturers (ECMA). The 39th Technical Committee (TC39) was delegated to "stan

language (originally bundled in the Cenvi software). After renaming it scriptease. (The language that the client executes) Netscape (Netscape) receives the idea of Nombas, (Brendan Eich) in its Netscape Navigator2. 0 The product has developed a set of LiveScript scripting languages. Sun and Netscape are working together. After the change was called JavaScript Microsoft then imitated its IE3.0 product with a JavaScript clone called JScript. To unify the three, the ECMA (European Computer Manufac

, Microsoft, Borland, etc.) is responsible for standardizing the syntax and semantics of a common, cross-platform, vendor-neutral scripting language. TC39 the standard for ecma-262--to define a new scripting language called ECMAScript, which has been completed for several months.In 1998, ISO/IEC (International Organization for Standardization and Electrotechnical Commission) also adopted ECMAScript as the standard (i.e. iso/

-focused complex systems Security-focused, complex systems, such as avionics, automobiles, trains and medical devices, contain more and more software. Companies that develop these systems need to follow industry-standard guidance, bring their products to market, and verify that their applications are compliant. The rational Rhapsody V8.0 contains an IBM rational Rhapsody Kit for ISO 26262 and IEC 61508, which provides a documented reference workflow,

This article was reproduced from: http://www.cnblogs.com/chutianyao/archive/2012/04/13/2446140.html Recording program to add new features: Record CMMB TV shows, our cards are sent out of the RTP stream (H264 video and AAC audio), the recording program to do the work is: (1) Receiving and parsing RTP packets, separating out H264 and AAC data streams; (2) H264 video and AAC audio are encapsulated in some format and finally saved as a file for viewing by the user. The first step is already part of

objects under a specific AV scene coordinate. At the same time there are AV objects and AV Scenes of intellectual property protection and other issues. MPEG4 provides us with a rich AV scene.Compared with MPEG-1 and MPEG-2, MPEG-4 is more suitable for interactive AV services and remote monitoring, and its design objectives make it more adaptable and scalable: MPEG-4 transfer rate between 4800-64000bps, 176x resolution 144, the ability to use very narrow bandwidth through frame reconstruction te

DescriptionECMA (European Computer Manufacturing Association)?? The ECMA (European Computer Manufacturing Association) defines the ECMA-262 specification. The International Organization for Standardization (ISO/IEC) also adopted ECMAScript as the standard (iso/iec-16262). Since then, Web browsers have struggled (albeit with varying degrees of success and failure) to ECMAScript as the basis for JAVASCRIPT im

ECMA-262 is only the basis of JavaScript, developers can build a more complete scripting language on top of that. (1) ECMA-262 1th Edition: Essentially the same as the Netscape JavaScript 1.1, in addition to the browser-specific features, support for the Unicode standard (multi-language development), the object has become a peace platform independent. (June 1997)(2) ECMA-262 2nd edition: Strictly consistent with iso/iec-16262 (i.e. ECMAScript), no ad

JavaScript introduces the history of JavaScript 1992 Nombas developed the embedded scripting language for C-minus-minus (c--), which was originally bound to Cenvi software, and renamed it Scriptease (the language that the client executes). Netscape (Netscape) received Nombas's philosophy, (Brendan Eich) developed a set of Netscape scripting languages in its Navigator livescript 2.0 product. Sun and Netscape were done together, and then renamed JavaScript. Microsoft then emulate

Reprinted from Http://www.cnblogs.com/liwenzhou/p/8004649.htmlFirst, JavaScript overview of the history of 1.JavaScript 1992 Nombas developed the embedded scripting language for C-minus-minus (c--) (originally bundled in Cenvi software). Rename it scriptease. (The language that the client executes) Netscape (Netscape) received Nombas's philosophy, (Brendan Eich) developed a set of Netscape scripting languages in its Navigator livescript 2.0 product. Sun and Netscape are done togethe

example,hello.c. You can use "VI","vim" or any other text editor to write your C language program.C11C11 (also known as C1X) means ISO standard ISO/IEC 9,899:2011 and is currently the latest C language standard. The C language standard before it is C99.New features Alignment (Alignment) normalization (including _alignas, alignof operators, Aligned_alloc functions, and _noreturn function tag, similar to GCC's __attribute__ ((

Chinese is GB2312, which mistakenly considers the printf output UTF-8 string to be GB2312, causing garbled characters.3.2 Best SolutionIf there are no non-ASCII characters in the string constants, it is recommended that the source file use unsigned UTF-8 encoding to support the earlier compilers.If the string constants contain non-ASCII characters, it is recommended that the source file use a signed UTF-8 encoding, which will enable most compilers to correctly handle the source character set.Su

1, what is character encoding? Character (Character) is the general name of words and symbols, including text, graphic symbols, mathematical symbols and so on. A set of abstract characters is the character set (Charset). Character sets appear to facilitate the dissemination and storage of information. Currently used in the character set are: Ascii,iso 8859-1,unicode,gb2312 2, what are the characteristics of various coding sets? Ascii: ASCII (American Standard Code for Information Interchange

Many people even some books on the market use void main (), in fact, this is wrong. void Main () has never been defined in C + +. C + + Father Bjarne Stroustrup explicitly in the FAQ on his home page that the definition void main () {/* ... */} is not and never has been C + +, nor ha s it even been c. (void Main () never exists in C + + or C). Let me say a few words about the definition of the main function in the C and C + + standards. 1. C In C89, main () is acceptable. Brian W. Kernighan and

There are two sets of specific control characters:The seven-digit ASCII defines 33 codes as control characters, which are 0 to 31 and 127 (at 0x00-0x1F and 0x7F ).Compatible eight-bit ISO/IEC 8859-1 with 32 codes defined from ISO/IEC 6429 to 128, located at 0x80-0x9F.Function wpjam_strip_control_characters ($ str) {return preg_replace ('/[\ x00-\ x1F \ x7F-\ x9F]/U', '', $ str );}In our usua

, I seriously doubt it. Many people even some books on the market use void main (), in fact, this is wrong. void Main () has never been defined in C + +. C + + Father Bjarne Stroustrup explicitly in the FAQ on his home page that the definition void main () {/* ... */} is not and never has been C + +, nor has It even been c. (void main () never existed in C + + or C). Let me say a few words about the definition of the main function in the C and C + + standards. 1. C In C89, main () is acceptable.

+ + standards."The C Programming Language (" C programming Language ") uses the main (). "---this is because the first version of the C language has only one type, that is int, no char, no long, no float, ... Since there is only one type, then it can not be written, and later the improved version for the compatibility of the previous code thus stipulates: The return value is not clearly marked, the default return value is int, which means that main () is equivalent to int main (), not equivalen