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  • hadoop纱线集群是什么Intro to Yarn 纱线介绍 Install Yarn 安装纱 Managing packages 管理包 Initialize a new project 初始化一个新项目 Install the dependencies of an existing project 安装现有项目的依赖...

    hadoop纱线集群是什么

    纱线介绍 (Intro to Yarn)

    Yarn is a JavaScript Package Manager, a direct competitor of npm, and it’s one of the Facebook Open Source projects.

    Yarn是JavaScript Package Manager,是npm的直接竞争对手,并且是Facebook开放源代码项目之一。

    It’s compatible with npm packages, so it has the great advantage of being a drop-in replacement for npm.

    与npm软件包兼容 ,因此具有取代npm的巨大优势。

    When it launched it used to be way faster than npm due to parallel download and caching, but now npm did catch up with many of its features and is now the solution I recommend.

    当它启动时,由于并行下载和缓存,它的速度通常比npm快,但是现在npm确实赶上了它的许多功能,现在是我推荐的解决方案。

    Tools eventually converge to a set of features that keeps them on the same level to stay relevant, so we’ll likely see those features in npm in the future - competition is nice for us users.

    工具最终会融合为一组功能,使它们保持相同的水平以保持相关性,因此我们将来可能会在npm中看到这些功能-竞争对我们用户来说很好。

    安装纱 (Install Yarn)

    While you can install Yarn with npm (npm install -g yarn), it’s not recommended by the Yarn team.

    虽然可以使用npm ( npm install -g yarn )安装Yarn,但是Yarn团队不建议这样做。

    System-specific installation methods are listed at https://yarnpkg.com/en/docs/install. On macOS for example you can use Homebrew and run

    特定于系统的安装方法列在https://yarnpkg.com/en/docs/install 。 例如,在macOS上,您可以使用Homebrew并运行

    brew install yarn

    but every Operating System has its own package manager of choice that will make the process very smooth.

    但是每个操作系统都有自己选择的软件包管理器,可以使过程非常顺利。

    In the end, you’ll end up with the yarn command available in your shell:

    最后,您将获得shell中可用的yarn命令:

    Yarn command installed

    管理包 (Managing packages)

    Yarn writes its dependencies to a file named package.json, which sits in the root folder of your project, and stores the dependencies files into the node_modules folder, just like npm if you used it in the past.

    Yarn将其依赖项写入名为package.json的文件中,该文件位于项目的根文件夹中,并将依赖项文件存储到node_modules文件夹中, 就像过去使用npm一样。

    初始化一个新项目 (Initialize a new project)

    yarn init

    starts an interactive prompt that helps you quick start a project:

    启动一个交互式提示,可帮助您快速启动项目:

    Running yarn init

    安装现有项目的依赖项 (Install the dependencies of an existing project)

    If you already have a package.json file with the list of dependencies but the packages have not been installed yet, run

    如果您已经具有带有依赖项列表的package.json文件,但是尚未安装软件包,请运行

    yarn

    or

    要么

    yarn install

    to start the installation process.

    开始安装过程。

    在本地安装软件包 (Install a package locally)

    Installing a package into a project is done using

    使用以下命令将软件包安装到项目中

    yarn add package-name

    全局安装软件包 (Install a package globally)

    yarn global add package-name

    在本地安装软件包作为开发依赖项 (Install a package locally as a development dependency)

    yarn add --dev package-name

    Equivalent to the --save-dev flag in npm

    等效于npm中的--save-dev标志

    取出包裹 (Remove a package)

    yarn remove package-name

    检查许可证 (Inspecting licenses)

    When installing many dependencies, which in turn might have lots of dependencies, you install a number of packages, of which you don’t have any idea about the license they use.

    当安装许多依赖关系时,这些依赖关系又可能具有很多依赖关系,您将安装许多软件包,而对于它们使用的许可证一无所知。

    Yarn provides a handy tool that prints the license of any dependency you have:

    Yarn提供了一个方便的工具,可以打印您具有的任何依赖项的许可证:

    yarn licenses ls

    The yarn packages licenses visualized

    and it can also generate a disclaimer automatically including all the licenses of the projects you use:

    并且它还可以自动生成免责声明,包括您使用的项目的所有许可证:

    yarn licenses generate-disclaimer

    Disclaimer generated by yarn

    检查依赖 (Inspecting dependencies)

    Do you ever check the node_modules folder and wonder why a specific package was installed? yarn why tells you:

    您是否曾经检查过node_modules文件夹,并且想知道为什么安装了特定的软件包? yarn why告诉你:

    yarn why package-name

    The result of yarn why

    升级包 (Upgrading packages)

    If you want to upgrade a single package, run

    如果要升级单个软件包,请运行

    yarn upgrade package-name

    To upgrade all your packages, run

    要升级所有软件包,请运行

    yarn upgrade

    But this command can sometimes lead to problems, because you’re blindly upgrading all the dependencies without worrying about major version changes.

    但是此命令有时会导致问题,因为您是在盲目升级所有依赖项而不必担心主要版本更改。

    Yarn has a great tool to selectively update packages in your project, which is a huge help for this scenario:

    Yarn有一个很好的工具可以有选择地更新项目中的程序包,对于这种情况有很大的帮助:

    yarn upgrade-interactive

    Upgrading packages with yarn

    如何升级纱线 (How to upgrade Yarn)

    At the time of writing there is no auto-update command.

    在撰写本文时,没有自动更新命令。

    If you used brew to install it, like suggested above, use:

    如果您像上面建议的那样使用brew安装,请使用:

    brew upgrade yarn

    If instead you installed using npm, use:

    如果您是使用npm安装的,请使用:

    npm uninstall yarn -g
    npm install yarn -g

    翻译自: https://flaviocopes.com/yarn/

    hadoop纱线集群是什么

    展开全文
  • 千兆以太网交叉线Crossover Cable is used to connect two same type devices back to back to provide a network connection. This can be also called a direct ethernet connection. What makes crossover cable ...
    千兆以太网交叉线

    千兆以太网交叉线

    Crossover Cable is used to connect two same type devices back to back to provide a network connection. This can be also called a direct ethernet connection. What makes crossover cable different is the connecting devices are the same type as two computers or two routers etc where the data communication lines should be reversed. The signals should be crossed intentionally where they send signal will be receiving a signal and receive signal will send a signal for the counterpart system.

    Crossover Cable用于背对背连接两个相同类型的设备以提供网络连接。 这也可以称为直接以太网连接。 交叉电缆的不同之处在于,连接设备的类型与两台计算机或两台路由器等的类型相同,其中数据通信线路应反向。 信号应有意地交叉,在这些信号中,它们的发送信号将接收信号,而接收信号将向对方系统发送信号。

    交叉布线方案 (Crossover Wiring Scheme)

    There is two pinout schemes named T568A and T568B . A crossover cable uses both of these scheme end of the ethernet cable. You can see these pinout in the following diagram.

    有两种引脚分配方案,分别为T568AT568B 。 交叉电缆使用以太网电缆的这两个方案端。 您可以在下图中看到这些引脚。

    Crossover Wiring Scheme
    交叉布线方案

    T-568A颜色引脚(T-568A Color Pinout)

    • White Green

      白绿
    • Green

      绿色
    • White Orange

      白橙
    • Blue

      蓝色
    • White Blue

      白蓝
    • Orange

      橙子
    • White Brown

      白棕
    • Brown

      棕色

    T-568B颜色引脚(T-568B Color Pinout)

    • White Orange

      白橙
    • Orange

      橙子
    • White Green

      白绿
    • Blue

      蓝色
    • White Blue

      白蓝
    • Green

      绿色
    • White Brown

      白棕
    • Brown

      棕色

    We can see the crossover cable connection more clear in the following diagram. The following connections are made to make a crossover cable.

    在下图中,我们可以更清楚地看到交叉电缆的连接。 进行以下连接以构成交叉电缆。

    • Connector A Pin 1 <-> Connector B Pin 3

      连接器A引脚1 <->连接器B引脚3
    • Connector A Pin 2 <-> Connector B Pin 6

      连接器A引脚2 <->连接器B引脚6
    • Connector A Pin 3 <-> Connector B Pin 1

      连接器A针3 <->连接器B针1
    • Connector A Pin 6 <-> Connector B Pin 2

      连接器A引脚6 <->连接器B引脚2
    Crossover Wiring Scheme
    交叉布线方案

    交叉电缆的使用(Crossover Cable Usage)

    Crossover cable is used for different cases where which are depicted with the following diagrams.

    交叉电缆用于不同的情况,如下图所示。

    • Switch to Switch

      切换到切换
    • Switch to Hub

      切换到集线器
    • Hub to Hub

      集线器到集线器
    • Router to Router

      路由器到路由器
    • Router to PC

      路由器到电脑
    • PC to PC

      电脑到电脑
    Crossover Cable Usage
    交叉电缆的使用

    跳线(直)电缆与交叉电缆(Patch (Straight) Cable vs Crossover Cable)

    Crossover cable is the alternative of the Straight or Patch Cable. They are using the same cables with different pinouts were used for a different type of connections.

    交叉电缆是直电缆或跳线的替代产品。 他们使用的是相同的电缆,不同的引脚分配用于不同类型的连接。

    • The crossover uses different pinout for the ends like if one end is T-568A another end should be T-568B but in straight cable, both ends will be the same pinout like if one end is T-568A the other end will be T-568A too.

      分频器的两端使用不同的引脚分配,例如一端是T-568A,另一端应该是T-568B,但是在直电缆中,两端将是相同的引脚,就像一端是T-568A另一端是T- 568A也是。
    • Crossover cable will be used the same type devices where Straight cable is used for a different type of devices where a crossover of the pins are not required.

      交叉电缆将与直电缆用于相同类型的设备,而不同类型的设备则不需要引脚交叉。
    LEARN MORE  What Is RJ45 Connector?
    了解更多什么是RJ45连接器?

    自动分频器的自动MDI标准 (Auto MDI Standard For Automatic Crossover)

    Auto MDI is a technology where the cable type can be detected and configured automatically with the software on the network interface card. This is very useful where a crossover cable can be used to connect different types of devices by using Auto MDI technology. Auto MDI is provided by the network interface card. Today most of the network ports like modem, pc, laptop, switch, router use the auto MDI where there is no need to find proper cable type.

    Auto MDI是一项技术,可以使用网络接口卡上的软件自动检测和配置电缆类型。 这在使用交叉电缆通过Auto MDI技术连接不同类型的设备时非常有用。 自动MDI由网络接口​​卡提供。 如今,大多数网络端口(如调制解调器,个人计算机,笔记本电脑,交换机,路由器)都使用自动MDI,而无需查找正确的电缆类型。

    翻译自: https://www.poftut.com/what-is-crossover-ethernet-cable-compare-crossover-with-patch-cable/

    千兆以太网交叉线

    展开全文
  • 我写的那个类想画由5个点链接起来的线,节点用小圆表示画出来了,可是线却画不出来。这怎么回事,主要代码如下 public void draw() { Canvas canvas = getHolder().lockCanvas(); canvas.drawColor(Color....
  • 随着USB PD快充协议的普及,USB-C to USB-C数据线市场占有率不断提升。这种线缆拥有传统线缆无法比拟的优势–支持USB3.1数据传输以及电流20V/5A 100W电力传输。 承载5A的电流的USB-C to USB-C线材必须配备E-Marker...

    随着USB PD快充协议的普及,USB-C to USB-C数据线市场占有率不断提升。这种线缆拥有传统线缆无法比拟的优势–支持USB3.1数据传输以及电流20V/5A 100W电力传输。

    承载5A的电流的USB-C to USB-C线材必须配备E-Marker芯片,然而5A只是电流承载能力,对于输出传输来说,还需要区分是USB 2.0接口还是USB 3.1 Gen1或者USB 3.1 Gen2,所以USB-C to USB-C线材的分类也比较多。苹果笔记本随机的就是USB 2.0数据接口的5A线材。

    由于这种高标准的数据线目前是市场上并不多,同时将会有很大的市场空间,但是开博尔公司在4月底即将上架一款USB 3.1 Gen2 Type-C数据线,我们来提前了解一下这款数据线有何特点。

    线体直径4.8MM,内部线材质量上乘。TPE外被,材质健康环保,锌合金金属接口,一体成型,坚固耐用。内部芯线为镀锌铜线,传输速率快,外加多层屏蔽层,抵抗外界干扰。

    数据线配备E-Marker芯片为什么一个传输速率好的数据线要配备E-Marker r芯片呢,我们从USB-IF协会的标准中了解到,当USB-C线缆的传输速度为USB 2.0时,是不要求配E-marker芯片的。但是当传输速度达到USB 3.1 Gen1(5Gbps)或者USB 3.1 Gen2(10Gbps)时,就必须使用E-Marker芯片,这与USB-C线缆对功率没太大关系。但是E-Marker芯片在标记线缆数据性能的同时,也会标记线缆的电力传输能力。 

      所以,这款开博尔数据线支持USB 3.1 Gen2传输速率,那E-Marker芯片是必不可少的。

    展开全文
  • 自动化生产线认知 什么是认知自动化,为什么重要? (What is cognitive automation and why does it matter?) Cognitive automation is a summarizing term for the application of machine learning technologies ...

    自动化生产线认知

    什么是认知自动化,为什么重要? (What is cognitive automation and why does it matter?)

    Cognitive automation is a summarizing term for the application of machine learning technologies to automation in order to take over tasks which would otherwise require manual labor to be accomplished.

    认知自动化是将机器学习技术应用于自动化以接手可能需要完成人工工作的任务的概括性术语。

    As a result, businesses can streamline their workflows beyond the scope of current automation technologies, and accomplish a next level of operational efficiency. According to a McKinsey study, businesses that adopted cognitive automation tools were able to:

    因此,企业可以简化其工作流程,使其超出当前自动化技术的范围,并实现更高水平的运营效率。 根据麦肯锡的一项研究 ,采用认知自动化工具的企业能够:

    • Automate approximately 50–70 percent of tasks.

      使大约50%至70%的任务自动化。
    • Cut down data processing time by 50 to 60 percent.

      将数据处理时间减少50%到60%。
    • Decrease annual labour expenditure by 20–30%

      将年度人工支出减少20–30%
    • Achieve triple-digit ROI

      实现三位数的投资回报率

    Given its potential, companies are starting to embrace this new technology in their processes. According to a 2019 global business survey by Statista, around 39 percent of respondents confirmed that they have already integrated cognitive automation at a functional level in their businesses. Also, 32 percent of respondents said they will be implementing it in some form by the end of 2020.

    鉴于其潜力,公司开始在其流程中采用这项新技术。 根据Statista2019年全球业务调查 ,大约39%的受访者确认他们已经在业务的功能级别上集成了认知自动化。 此外,有32%的受访者表示,他们将在2020年底之前以某种形式实施它。

    Thus, cognitive automation represents a leap forward in the evolutionary chain of automating processes — reason enough to dive a bit deeper into cognitive automation and how it differs from traditional process automation solutions.

    因此,认知自动化代表了自动化流程进化链中的一次飞跃-有足够的理由更深入地研究认知自动化及其与传统过程自动化解决方案的不同之处。

    认知自动化与传统自动化工具 (Cognitive automation vs traditional automation tools)

    With light-speed jumps in ML/AI technologies every few months, it’s quite a challenge keeping up with the tongue-twisting terminologies itself aside from understanding the depth of technologies. To make matters worse, often these technologies are buried in larger software suites, even though all or nothing may not be the most practical answer for some businesses.

    ML / AI技术每隔几个月就会以飞速的速度发展,除了理解技术的深度之外,跟上令人费解的术语本身是一个很大的挑战。 更糟糕的是,尽管对于某些企业而言, 全部或全部都不是最实际的答案,但这些技术通常都埋在更大的软件套件中。

    Let’s break down how cognitive automation bridges the gaps where other approaches to automation, most notably robotic process automation (RPA) and integration tools (iPaaS) fall short.

    让我们细分一下认知自动化如何弥合其他自动化方法(最著名的是机器人流程自动化(RPA)和集成工具(iPaaS))不足的空白。

    Traditional RPA is mainly limited to automating processes (which may or may not involve structured data) that need swift, repetitive actions without much contextual analysis or dealing with contingencies. In other words, the automation of business processes provided by them is mainly limited to finishing tasks within a rigid rule set. That’s why some people refer to RPA as “click bots”, although most applications nowadays go far beyond that.

    传统的RPA主要限于自动化流程(可能涉及结构化数据,也可能不涉及结构化数据),这些流程需要快速,重复的操作,而无需进行大量的上下文分析或应急处理。 换句话说,由它们提供的业务流程的自动化主要限于在严格的规则集中完成任务。 这就是为什么有些人将RPA称为“点击bot”的原因,尽管当今大多数应用程序已经远远超过了它。

    The automated processes can only function effectively as long as the decisions follow a “if/then” logic without needing any human judgment in between. However, this rigidity leads RPAs failing to retrieve meaning and process forward unstructured data.

    只要决策遵循“ if / then”逻辑,而在两者之间不需要任何人为判断,则自动化流程才能有效运行。 但是,这种僵化导致RPA无法检索含义并处理向前的非结构化数据。

    Image for post

    This is not to say that processes cannot be automated using RPA, quite the contrary: There is a variety of processes which are enhanced through it, some of the most prominent applications being found e.g. in data entry, automated help desk support, and approval routings.

    这并不是说流程不能使用RPA进行自动化,相反:有许多流程可以通过RPA进行增强,发现了一些最杰出的应用程序,例如数据输入,自动服务台支持和审批流程。 。

    In contrast, cognitive automation or intelligent process automation (IPA) can accommodate both structured and unstructured data to automate more complex processes.

    相反,认知自动化或智能过程自动化(IPA)可以容纳结构化和非结构化数据,以自动化更复杂的过程。

    Image for post

    It infuses a cognitive ability and can accommodate the automation of business processes utilizing large volumes of text and images. Cognitive automation, therefore, marks a radical step forward compared to traditional RPA technologies that simply copy and repeat the activity originally performed by a person step-by-step.

    它灌输了一种认知能力,并可以利用大量文本和图像来适应业务流程的自动化。 因此,与传统的RPA技术相比,认知自动化标志着根本性的进步,传统的RPA技术仅简单地逐步复制和重复一个人最初执行的活动。

    认知自动化的变体 (Variants of cognitive automation)

    As mentioned above, cognitive automation is fueled through the use of machine learning and its subfield deep learning in particular. And without making it overly technical, we find that a basic knowledge of fundamental concepts is important to understand what can be achieved through such applications.

    如上所述,尤其是通过使用机器学习及其子领域深度学习来推动认知自动化。 而且,在不过度技术化的情况下,我们发现基本概念的基本知识对于理解通过此类应用程序可以实现的内容很重要。

    And while we are still far away from what scientists refer to general artificial intelligence, machines are already exceptional at a few tasks. In fact, machines are able to mimic our own abilities, often outperforming those of humans when it comes to speed and precision — proper training provided:

    尽管我们与科学家所指的一般人工智能相距甚远,但机器在某些任务上已经非常出色。 实际上,机器能够模仿我们自己的能力,在速度和精度方面通常会超过人类的能力-提供适当的培训:

    • Computer vision (also referred to as image processing) <> See

      计算机视觉(也称为图像处理)<>请参见
    • Optical character recognition (OCR) <> Read

      光学字符识别(OCR)<>读取
    • Natural language processing (NLP) <> Comprehend

      自然语言处理(NLP)<>理解
    • Sound processing <> Listen

      声音处理<>听

    We won’t go much deeper into the technicalities of machine learning here but if you are new to the subject and want to dive into the matter, have a look at our beginner’s guide to how machines learn.

    在这里,我们不会对机器学习的技术进行更深入的了解,但是,如果您是本主题的新手,并且想深入探讨这一问题,请参阅我们的机器学习初学者指南

    Let’s now put some of them in context and zoom in on two examples where cognitive automation has been able to redefine processes and work content!

    现在让我们将其中一些放在上下文中,并放大两个示例,其中认知自动化已经能够重新定义流程和工作内容!

    索赔处理 (Claims processing)

    Processing claims is perhaps one of the most labor-intensive tasks faced by insurance company employees and thus poses an operational burden on the company. Many of them have achieved significant optimization of this challenge by adopting cognitive automation tools.

    处理理赔可能是保险公司员工面临的最劳动密集型任务之一,因此给公司带来了运营负担。 通过采用认知自动化工具,他们中的许多人已经对这一挑战进行了重大优化。

    Through cognitive automation, it is possible to automate most of the essential routine steps involved in claims processing. These tools can port over your customer data from claims forms that have already been filled into your customer database. It can also scan, digitize, and port over customer data sourced from printed claim forms which would traditionally be read and interpreted by a real person.

    通过认知自动化,可以使索赔处理中涉及的大多数基本常规步骤自动化。 这些工具可以从已经填写到客户数据库中的索赔表中移植客户数据。 它还可以扫描,数字化和移植来自打印的索赔表的客户数据,这些数据通常由真实的人读取和解释。

    文件处理自动化 (Document processing automation)

    As outlined above, the key to the success of cognitive automation tools lays not only in executing rules of the system but in turning unstructured files — such as documents — into structured data: By extracting relevant unstructured data from them and transforming it into a standardized format, this data can finally be integrated with the remaining systems landscape.

    如上所述,认知自动化工具成功的关键不仅在于执行系统规则,还在于将非结构化文件(例如文档)转换为结构化数据:通过从文件中提取相关的非结构化数据并将其转换为标准化格式,这些数据最终可以与其余系统环境集成在一起。

    In addition, cognitive automation tools can understand and classify different PDF documents. This allows us to automatically trigger different actions based on the type of document received.

    另外,认知自动化工具可以理解和分类不同的PDF文档。 这使我们能够根据收到的文档类型自动触发不同的操作。

    Image for post

    Example of an end-to-end cognitive workflow with a PDF classifier

    具有PDF分类器的端到端认知工作流程的示例

    These are just two examples where cognitive automation brings huge benefits. You can also check out our success stories where we discuss some of our customer cases in more detail.

    这只是认知自动化带来巨大收益的两个例子。 您还可以查看我们的成功案例 ,在其中我们将更详细地讨论一些客户案例。

    为您的业务评估正确的认知自动化方法 (Evaluating the right approach to cognitive automation for your business)

    The concept alone is good to know but as in many cases, the proof is in the pudding. The next step is, therefore, to determine the ideal cognitive automation approach and thoroughly evaluate the chosen solution.

    仅仅知道这个概念是很好的,但是在许多情况下,证明都在布丁中。 因此,下一步就是确定理想的认知自动化方法,并全面评估所选解决方案。

    Besides the application at hand, we found that two important dimensions lay in (1) the budget and (2) required machine learning capabilities. This article will explain to you in detail which cognitive automation solutions are available for your company and hopefully guide you to the most suitable one according to your needs.

    除了手头的应用程序,我们发现两个重要方面在于(1)预算和(2)所需的机器学习功能。 本文将向您详细说明哪些认知自动化解决方案可用于您的公司,并希望根据您的需求引导您选择最合适的解决方案。

    前进的道路 (The Path Forward)

    Most businesses are only scratching the surface of cognitive automation and are yet to uncover their full potential. A cognitive automation solution may just be what it takes to revitalize resources and take operational performance to the next level.

    大多数企业只是摸索认知自动化的表面,而尚未发掘其全部潜力。 认知自动化解决方案可能只是恢复资源并使运营绩效更上一层楼所需要的。

    Cognitive automation may not yet have an expansive footprint due to the underlying technology being relatively new. But it is clearly gaining momentum as it continues to deliver promising results and for what it’s worth, it adds the final missing piece to the puzzle: human-like and even superhuman intelligence.

    由于基础技术相对较新,因此认知自动化可能尚未扩展。 但是,随着它继续提供令人鼓舞的结果,并且显然是有价值的,它显然正在获得动力,它为难题增加了最后一个缺失的部分:类人甚至超人的智力。

    Originally published at https://colabel.com.

    最初发布在 https://colabel.com

    翻译自: https://medium.com/colabel/what-is-cognitive-automation-8758388b0848

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