Automotive Ethernet - The Definitive Guide - 车载以太网(42章全).DOC下载-CSDN论坛

车载以太网权威指南 Automotive Ethernet 很完整的UDS资料

车载以太网权威指南 Automotive Ethernet 原版文字版非扫描目录全可扫描可复制。 车载以太网权威指南 Automotive Ethernet 很完整的UDS资料。 车载以太网权威

车载以太网学习（四）

在车载以太网中会使用802.1Q协议，使用VLAN技术，这样可以通过VLAN中的PCP字段来定义优先级，可以保证优先级的数据优先发送，但是这种简单粗暴的方式容易造成低优先级的数据丢失，因此，AVB将被应用到车载网络之中。...

《以太网：权威指南》前5章

一本关于以太网的很不错的书。该书得到以太网大牛Rich Seifert的推荐，Rich也是《千兆以太网技术与应用》的作者，这本书有点儿老了，但仍不失为一本好书。

车载以太网权威指南 (英文原版)

车载以太网权威指南，英文版，可复制适合想深入学习车载以太网的

车载以太网权威指南第七章中文版

车载以太网权威指南，对于想了解车载以太网的朋友是最权威和丰富的书籍，共42章一千多页，内容很全面

Automotive Ethernet - The Definitive Guide - 车载以太网(42章全).DOC

Automotive Ethernet - The Definitive Guide - 车载以太网(42章全)，全网唯一的word版本，与书籍排版一致，可编辑复制。

Automotive Ethernet - The Definitive Guide - 车载以太网(42章全)

最全的Automotive Ethernet - The Definitive Guide - 车载以太网书本，购买用来学习Ethernet AVB用的。老外的书籍，内容很丰富。车载以太网目前最好的也是唯一的一本书籍了。

车载以太网权威指南 Automotive Ethernet: The Definitive Guide

车载以太网，Automotive Ethernet: The Definitive Guide，Automotive Ethernet：

Automotive Ethernet - The Definitive Guide（车载以太网）（英文版）

车载以太网是一种用以太网连接车内电子单元的新型局域网技术。与普通的以太网使用4对非屏蔽双绞线（UTP）电缆不同，车载以太网在单对非屏蔽双绞线上可实现100Mbit/s甚至1Gbit/s的数据传输速率，同时还应满足汽车行业对高可靠性、低电磁辐射、低功耗、带宽分配、低延迟以及同步实时性等方面的要求。

Automotive Ethernet - The Definitive Guide

Automotive Ethernet - The Definitive Guide Automotive Ethernet - The Definitive Guide

车载以太网权威指南

我自己收集的英文版《车载以太网权威指南》和中文版的相关目录文档

车载以太网技术（一）

随着车载ECU数量的增多和待传数据的体量增大，普通的CAN网络已经无法满足需求了，特别是在舒适信息部门，全方位影像等功能需要很大的带宽，这类的需求CAN-FD也是无法满足的，而其他技术现在的成熟度和普及度并不是很高。日常生活中使用的以太网现在使用的最多的是百兆的，千兆网的技术也已经相当成熟，由于工艺的提高现在只需要两根双绞线就可以完成数据的传输，并且现在已经形成了OPEN联盟，制定了相关的协议

车载以太网权威指南 Automotive Ethernet 原版文字版非扫描目录全可扫描可复制

车载以太网权威指南， Automotive Ehternet Colt Correa Charles M. Kozierok Robert B. Boatright Jeffrey Quesnelle

车载以太网学习（七）

在Switch中，MAC地址没有在设置的地址表中的帧的处理有三种方式：（1）广播（2）丢弃（3）转发到指定端口

车载以太网 Ethernet and IP for Automotive E/E-Architectures

Todays premium class vehicles implement a variety of distributed applications cov- ering all areas of the vehicle, such as engine, chassis, body, comfort, as well as driver assistance functions. Most of these systems are interconnected via a com- mon network infrastructure, the so-called Electric and Electronic architecture (E/E- architecture) of the vehicle which includes not only the communication but also the power distribution, physical placement of components, and the mapping of function- ality on these components. This architecture includes different automotive commu- nication technologies and gateways to enable cross-network communication. Typical communication technologies to interconnect Electronic Control Units (ECUs) are Lo- cal Interconnect Network (LIN) [LIN10], Controller Area Network (CAN) [CAN91], FlexRay (FR) [Fle10], Media Oriented Systems Transport (MOST) [MOS10], and Low Voltage Differential Signaling (LVDS) [LVD95]. The general benefits of using a common E/E-architecture are among others the possibility of reusing sensor data for different applications, the optimization of the wiring harness (for example the avoidance of parallel cabling in the same installation spaces), the simple extensibility when adding new functions, and the support for having different expansion stages.

（车载以太网)Automotive Ethernet_Consolidated_FINAL

美国英佩特斯：（车载以太网)Automotive Ethernet_Consolidated_FINAL

重量书籍：车载以太网_Automotive Ethernet (BMW 以太网负责人著作）

为什么要引入车载以太网？ BMW当时有哪些考虑？目前车载以太网在什么阶段？之后怎么发展？ 车载以太网有哪些特性？开发、测试者需要考虑到哪些方面？本书是BMW以太网负责人Thomas Konigseder带领他的BOSCH所著；书中无任何广告，全是以太网技术发展及技术本身描述；适合初学者以及自身以太网专家阅读； Thomas 于2017年离职，目前加入Technica Engineering 担任CTO，这家公司专门负责BMW、AUDI等车载以太网控制器的测试；同时建议大家买正版书籍！

Ethernet The Definitive Guide

以太网

Ethernet: The Definitive Guide

This is a book about Ethernet, a local area network (LAN) technology that allows you to connect a variety of computers together with a low-cost and extremely flexible network system. Virtually every computer manufacturer today supports Ethernet, and this broad support, coupled with its low cost and high flexibility, are major reasons for Ethernet's popularity.

Ethernet Definitive Guide

一本描述ethernet的好书，详细描述了Ehternet的底层实现

Automotive Ethernet车载以太网测试硬件介绍（BMW 10年以太网测试合作伙伴, Technica Engineering）

Technica Engineering 自从08年开始和BMW合作，是BMW AUDI 等车载以太网开发测试主要合作伙伴；硬件工具涵盖 100 Base-Tx与100 Base-T1互相转换的Media Converter, 以及数据链路层的Media Gateway(同时支持CAN,LIN,Flexray等），支持802.1AS时间同步；以及FPGA转换的TAP测试工具SPY，固定时间延迟，40ns时间精度时间标签等；

Automotive Etherent-The definitive guide.pdf

1. 英文版，共1628页；不是中文版，不是中文版 2. 车载以太网的权威资料

Automotive Ethernet Training

对车载以太网的通俗的讲解，适合刚接触车载以太网的人。

ethernet以太网

ethernet 真的很不错的资源你们看看吧 以太网的好资料

The Definitive Guide to HTML5 .pdf 下载

The Definitive Guide to HTML5 .pdf 下载

第一个车载以太网应用-BMW 环视项目背景及历史 BMW Automotive Ethernet application background （1）

本文主要介绍，BMW当初在汽车上应用以太网技术的背景及历史；此篇主要介绍BroadR-Reach/100BASE-T1技术的简要历史及背景； The Breakthrough: UTSP Ethernet for Automotive BMW decided to synchronize all hitherto knowledge with the future requirements...

Automotive Ethernet车载以太网测试仿真测试软件（BMW/AUDI 合作伙伴,Technica Engineering）

车载以太网开发测试工具，Technica Engineering；包括 1，ANDi, 仿真测试软件，支持车载以太网各种协议，Python, .net脚本编程；可实现自动化测试； 2，ADELa, 车载以太网数据库软件，支持.fibex及.arxml 3, 其他，包括SOME/IP测试套件等

车载以太网

参考：https://www.sohu.com/a/231971308_465591 伴随着汽车电子产品的不断增多，车内电控系统规模和复杂性日益增加，ECU 数量也不断攀升。据统计，1996 年，欧美典型的车辆上 ECU 数量为 6 个，到 2009 年，欧美高端车的控制器数量已经大于 70 个。同时，新的功能需求对车载网络提出不同要求，如高带宽、安全性、低成本等，而传统 CAN 总线已经...

INTRODUCING AUTOMOTIVE ETHERNET From BMW

INTRODUCING AUTOMOTIVE ETHERNET From BMW 20 PAGE FROM BMW

车载以太网权威指南英文样章

车载以太网权威指南，英文样章，有目录，部分章节内容

以太网抓包工具（ethernet)

非常好用的以太网抓包工具，用于以太网学习及分析。

android以太网的设置Ethernet

我的需要：我android硬件设备上带有网口，需要给这个网口设置静态ip，及获取状态ip，dns啊；rnrn我查了很多资料，网上代码，说要用Ethernet这个，但是这个在android.jar中没有；rnrn我又从网上找了下图中的jar；rn[img=https://img-bbs.csdn.net/upload/201509/02/1441157911_181037.png][/img]rnrn导入这些之后，还是有问题：rnrn[img=https://img-bbs.csdn.net/upload/201509/02/1441157944_565814.png][/img]rnrncontext点不出这些属性rnrn求解啊。。。。。rnrn求大神。。。。。rn

ethernet 以太网设置脚本

以太网设置脚本，在linux内核3.10版本和android5.1版本上亲测有效。

ETHERNET(以太网)安装手册

详细介绍与组网有关的硬件，网络设计，布线情况，IP分配等知识，图文并存，适合网络爱好者阅读．

The Definitive Guide to AdonisJs 免积分下载

免积分下载地址：https://xiaoding.ctfile.com/fs/1927055-241421098 更多免积分电子书，请关注我的简书主页https://www.jianshu.com/u/3a2d89402aca

车载以太网概述

1.什么是车载以太网？ 车载以太网是用于连接汽车内各种电气设备的一种物理网络。车载以太网的设计是为了满足车载环境中的一些特殊需求。例如：满足车载设备对于电气特性的要求（EMI/RF）；满足车载设备对高带宽、低延迟以及音视频同步等应用的要求；满足车载系统对网络管理的需求等。因此可以理解为，车载以太网在民用以太网协议的基础上，改变了物理接口的电气特性，并结合车载网络需求专门定制了一些新标准。针对车载...

车载以太网学习二

100BASE-T1可以使用的车规级的PHY：博通：BCM89810、BCM89811；恩智浦：TJA1100、TJA1102 等

车载以太网学习（十）

AVB参考标准： 802.1BA 802.1Q 802.1Qav 802.1Qat 802.1AS 802.11 1722

车载以太网开发咨询服务

概述伴随着汽车电子产品的不断增多，车内电控系统规模和复杂性日益增加，带宽要求越来越高，传统的CAN、LIN、FlexRay、MOST 已经满足不了这样的需求。而BroadR-Reach® 技术的推出，成功实现了以太网的车载化应用，这种全球使用最广泛的网络技术提供了100Mbps 的带宽，能更好地满足当前以及未来汽车发展对通信的需求，特别是信息娱乐系统和ADAS 领域。恒润科技携手国外专业公司，...

车载以太网学习（九）

车上VLAN的使用需要根据整车实际需求进行划分，目前绝大多数车厂只是在信息娱乐域的少数部件使用，暂时可以划分2-3个VLAN，或者不划分VLAN。

车载以太网开发测试解决方案

以太网

车载以太网TSN测试方法

车载以太网TSN的测试方法和参考方案。可以从本文学习

车载以太网相关名词解释

背景：刚刚接触车载以太网，经常被相关英文专用名词弄得一头雾水，在这里记录一下相关名词解释，以便查找备用。正文：1. 物理层名词解释100BASE-T1 —— IEEE组织对于传输速度为100Mbps的车载以太网物理层的正式命名。这里注意区别于100MBASE-TX（标准民用100Mbps以太网）1000BASE-T1 —— IEEE组织对于传输速度为1000Mbps的车载以太网物理层的正式命名。这...

车载以太网学习（五）

对于交换机的MAC地址表在车上是否可以只使用静态的、不支持MAC学习，需要根据OEM的实际需求来定义

NXP车载以太网

The SJA1105 is an IEEE 802.3-compliant 5-port automotive Ethernet switch

NXP车载以太网PHY

The TJA1100 is a 100BASE-T1 compliant Ethernet PHY optimized for automotive use cases

车载以太网权威指南第一章

车载以太网第一手资料，中文版，该书不是生搬课本知识，内容讲的非常让人接受，后续还会继续更新，

车载DOIP以太网协议

新一代车载以太网诊断协议，替代15765，ISO 13400，1-5

车载以太网权威指南第二章

车载以太网权威指南中文版的第二章，适合刚接触以太网的汽车人。国内目前无法购买到

车载以太网学习（三）

对于Switch，如果使用外挂PHY的方式，可能导致整体EMC无法通过的结果，因此，车载以太网推荐Switch集成PHY的形式。

车载以太网测试

车载以太网测试，物理层测试规范 This suite of tests has been developed to help implementers identify problems that BroadR-Reach devices may have with the PHY Control functions.

The Definitive Guide to JasperReports.pdf

The Definitive Guide to SWT and JFace

常备案头的终极SWT工具书

Elasticsearch The Definitive Guide(英文版)

Elasticsearch权威指导的英文版 ElasticSearch是一个基于Lucene的搜索服务器。它提供了一个分布式多用户能力的全文搜索引擎，基于RESTful web接口

Kafka The Definitive Guide

Kafka The Definitive Guide Kafka The Definitive GuideKafka The Definitive GuideKafka The Definitive GuideKafka The Definitive GuideKafka The Definitive Guide

the definitive guide to netbeans platform

The Definitive Guide to NetBeans™ Platform is a thorough and definitive introduction to the NetBeans Platform, covering all its major APIs in detail, with relevant code examples used throughout. 2009年最新版

PNG: The Definitive Guide

Kafka definitive guide

Kafka definitive guide, kafka权威指南英文文字版，带目录

Hadoop- the Definitive Guide

学习hadoop的经典教材。深入浅出。十分容易理解。推荐给大家

HBase The Definitive Guide

有关HBase介绍的书，英文版，很清晰，但是没有标签

The definitive Guide To Grails学习笔记

The definitive guide to Grails是一部Grails开发技术的经典书籍。这是网上关于该书的一些学习笔记，一共八篇，比较精炼，值得一读。

the definitive guide to drupal 7

《the definitive guide to drupal 7》英文版

Ajax - The Definitive Guide

Ajax - The Definitive Guide, 英文版; Ajax 权威指南

Dojo　 The Definitive Guide

Of all the Ajax-specific frameworks that have popped up in recent years, one clearly stands out as the industrial strength solution. Dojo is not just another JavaScript toolkit -- it's the JavaScript toolkit -- and Dojo: The Definitive Guide demonstrates how to tame Dojo's extensive library of utilities so that you can build rich and responsive web applications like never before. Dojo founder Alex Russell gives a foreword that explains the "why" of Dojo and of this book. Dojo provides an end-to-end solution for development in the browser, including everything from the core JavaScript library and turnkey widgets to build tools and a testing framework. Its vibrant open source community keeps adding to Dojo's arsenal, and this book provides an ideal companion to Dojo's official documentation. Dojo: the Definitive Guide gives you the most thorough overview of this toolkit available, showing you everything from how to create complex layouts and form controls closely resembling those found in the most advanced desktop applications with stock widgets, to advanced JavaScript idioms to AJAX and advanced communication transports. With this definitive reference you get: * Get a concise introduction to Dojo that's good for all 1.x versions * Well-explained examples, with scores of tested code samples, that let you see Dojo in action * A comprehensive reference to Dojo's standard JavaScript library (including fundamental utilities in Base, Dojo's tiny but powerful kernel) that you'll wonder how you ever lived without * An extensive look at additional Core features, such as animations, drag-and-drop, back-button handling, animations like wipe and slide, and more * Exhaustive coverage of out-of-the-box Dijits (Dojo widgets) as well as definitive coverage on how to create your own, either from scratch or building on existing ones * An itemized inventory of DojoX subprojects, the build tools, and the DOH, Dojo's unit-testing framework that you can use with Dojo -- or anywhere else

Hadoop: The Definitive Guide 3rd_edition

Hadoop: The Definitive Guide, Third Edition by Tom White 2012-01-27 Early release revision 1 Hadoop got its start in Nutch. A few of us were attempting to build an open source web search engine and having trouble managing computations running on even a handful of computers. Once Google published its GFS and MapReduce papers, the route became clear. They’d devised systems to solve precisely the problems we were having with Nutch. So we started, two of us, half-time, to try to re-create these systems as a part of Nutch. We managed to get Nutch limping along on 20 machines, but it soon became clear that to handle the Web’s massive scale, we’d need to run it on thousands of machines and, moreover, that the job was bigger than two half-time developers could handle. Around that time, Yahoo! got interested, and quickly put together a team that I joined. We split off the distributed computing part of Nutch, naming it Hadoop. With the help of Yahoo!, Hadoop soon grew into a technology that could truly scale to the Web. In 2006, Tom White started contributing to Hadoop. I already knew Tom through an excellent article he’d written about Nutch, so I knew he could present complex ideas in clear prose. I soon learned that he could also develop software that was as pleasant to read as his prose. From the beginning, Tom’s contributions to Hadoop showed his concern for users and for the project. Unlike most open source contributors, Tom is not primarily interested in tweaking the system to better meet his own needs, but rather in making it easier for anyone to use. Initially, Tom specialized in making Hadoop run well on Amazon’s EC2 and S3 services. Then he moved on to tackle a wide variety of problems, including improving the MapReduce APIs, enhancing the website, and devising an object serialization framework. In all cases, Tom presented his ideas precisely. In short order, Tom earned the role of Hadoop committer and soon thereafter became a member of the Hadoop Project Management Committee. Tom is now a respected senior member of the Hadoop developer community. Though he’s an expert in many technical corners of the project, his specialty is making Hadoop easier to use and understand. Given this, I was very pleased when I learned that Tom intended to write a book about Hadoop. Who could be better qualified? Now you have the opportunity to learn about Hadoop from a master—not only of the technology, but also of common sense and plain talk.

Elastic Search The Definitive Guide

HBase: The definitive guide

O'Reilly的新书，HBase的权威

Hadoop The Definitive Guide

Hadoop The Definitive Guide, 4th Edition

the definitive guide yo imagemagick

The definitive guide to imagemagick computing application

Oracle JRockit_The Definitive Guide

本书介绍jrockit实现，是深入理解jrockit必备工具书

Javascript - The Definitive Guide 6th.pdf

The Definitive Guide to HTML5

The Definitive Guide to HTML5 provides the breadth of information you’ll need to start creating the next generation of HTML5 websites. It covers all the base knowledge required for standards-compliant, semantic, modern website creation. It also covers the full HTML5 ecosystem and the associated APIs that complement the core HTML5 language. The Definitive Guide to HTML5 begins by tackling the basics of HTML5, ensuring that you know best practices and key uses of all of the important elements, including those new to HTML5. This section also covers extended usage of CSS3, JavaScript, and DOM manipulation, making you proficient in all core aspects of modern website creation. The final part of the book covers the associated W3C APIs that surround the HTML5 specification. You will achieve a thorough working knowledge of the Geolocation API, web storage, creating offline applications, and the new drag and drop functionality.

The Definitive Guide To HTML5

HTML5权威指南 The Definitive Guide To HTML5

maven definitive guide

Build engineers and project managers might refer to Maven as something more comprehensive: a project management tool. What is the difference? A build tool such as Ant is solely focused on preprocessing, compilation, packaging, testing, and distribution. A project management tool such as Maven provides a superset of features found in a build tool. In addition to providing build capabilities, Maven can also run reports, generate a web site, and facilitate communication among members of a working team. A more formal definition of Apache Maven: Maven is a project management tool which encompasses a project object model, a set of standards, a project lifecycle, a dependency management system, and logic for executing plugin goals at defined phases in a lifecycle. When you use Maven, you describe your project using a well-defined project object model, Maven can then apply cross-cutting logic from a set of shared (or custom) plugins.

Hadoop The Definitive Guide PDF

书名：Hadoop The Definitive Guide 语言：英文 The rest of this book is organized as follows. Chapter 2 provides an introduction to MapReduce. Chapter 3 looks at Hadoop filesystems, and in particular HDFS, in depth. Chapter 4 covers the fundamentals of I/O in Hadoop: data integrity, compression, serialization, and file-based data structures. The next four chapters cover MapReduce in depth. Chapter 5 goes through the practical steps needed to develop a MapReduce application. Chapter 6 looks at how MapReduce is implemented in Hadoop, from the point of view of a user. Chapter 7 is about the MapReduce programming model, and the various data formats that MapReduce can work with. Chapter 8 is on advanced MapReduce topics, including sorting and joining data. Chapters 9 and 10 are for Hadoop administrators, and describe how to set up and maintain a Hadoop cluster running HDFS and MapReduce. Chapters 11, 12, and 13 present Pig, HBase, and ZooKeeper, respectively. Finally, Chapter 14 is a collection of case studies contributed by members of the Apache Hadoop community.

The Definitive Guide to MongoDB

为数不多的关于mongodb的书籍之一，详细讲解mongodb的功能，对开发和使用mongodb都有参考价值

mongodb definitive guide

mongodb 指南。查询、插入、更新，与mysql等RDBMS对应的功能实现方法。

The Definitive Guide to Squarespace

书由Apress出版社出版发行，“Definitive Guide”系列丛书之一。这本书是介绍MySQL 5的权威手册，初学者可以以此开始学习MySQL数据库技术。

HTTP-The Definitive Guide

对HTTP协议比较详细的介绍

Jenkins The Definitive Guide 2011

1.Jenkins The Definitive Guide 2011; 2.英文原版,PDF格式;

MP3 definitive guide

MP3 definitive guide

Cloud Foundry - The Definitive Guide

Get started with Cloud Foundry, the leading Platform as a Service (PaaS) that’s dramatically changing how developers, operations practitioners, and especially DevOps teams deploy applications and services to the cloud. By introducing the underlying concepts beyond the core components, this practical guide will bootstrap your understanding of this service.Learn how to run Cloud Foundry in a highly available and secure environment, using a sound disaster-recovery policy based on the author’s frontline experience. This book removes the need to adopt a lengthy trial-and-error approach to deploying Cloud Foundry.

AWS ADMINISTRATION THE DEFINITIVE GUIDE

AWS管理大全，介绍AWS的概念、安全和访问管理、镜像和实例、安全性、存储和网络，AWS VPC虚拟私有云，监控，弹性扩展，负载均衡，数据库，简单存储等。

Elastic Search - The Definitive Guide

Elasticsearch is a real-time distributed search and analytics engine. It allows you to explore your data at a speed and at a scale never before possible.

Kafka_ The Definitive Guide

Apache Kafka is a publish/subscribe messaging system designed to solve this problem. It is often described as a “distributed commit log” or more recently as a “distrib‐ uting streaming platform.” A filesystem or database commit log is designed to provide a durable record of all transactions so that they can be replayed to consis‐ tently build the state of a system. Similarly, data within Kafka is stored durably, in order, and can be read deterministically. In addition, the data can be distributed within the system to provide additional protections against failures, as well as significant opportunities for scaling performance.

Jenkins The Definitive Guide 英文

持续集成工具Jenkins的权威指南书，配置知道，增加节点和创建pipeline

Maven: The Definitive Guide pdf

Convention over configuration is a simple concept. Systems, libraries, and frameworks should assume reasonable defaults without requiring that unnecessary configuration systems should “just work.” Popular frameworks such as Ruby on Rails and EJB3 have started to adhere to these principles in reaction to the configuration complexity of frameworks such as the initial Enterprise JavaBeans™ (EJB) specifications. An illustration of convention over configuration is something like EJB3 persistence. All you need to do to make a particular bean persistent is to annotate that class with @Entity. The framework will then assume table names and column names from the name of the class and the names of the properties. Hooks are provided for you to override these names if the need arises, but, in most cases, you will find that using the frameworksupplied defaults results in a faster project execution.

Clock_divder_made_easy下载

verilog代码图文并茂轻松实现各种分频相关下载链接：[url=//download.csdn.net/download/bessa/2191811?utm_source=bbsseo]//download.csdn.net/download/bessa/2191811?utm_source=bbsseo[/url]

基于PowerBuilder_SQLServer的小型财务信息管理系统的设计下载

基于PowerBuilder_SQLServer的小型财务信息管理系统的设计相关下载链接：[url=//download.csdn.net/download/gckqust06gck/2357708?utm_source=bbsseo]//download.csdn.net/download/gckqust06gck/2357708?utm_source=bbsseo[/url]

图书管理系统——美萍下载

pb的图书管理系统界面，设计的还可以只有前台，没有数据库相关下载链接：[url=//download.csdn.net/download/fenlanxiaoming/3221827?utm_source=bbsseo]//download.csdn.net/download/fenlanxiaoming/3221827?utm_source=bbsseo[/url]

Automotive Ethernet - The Definitive Guide - 车载以太网(42章全).DOC下载 [问题点数：0分]