精华内容
下载资源
问答
  • <div><p>I am using current master branch and an ampersand (&) at the beginning of a line in the calendar upsets the display. ...
  • <div><p>Using Matlab R2015a, I can't get messenger.c to build with ZMQ: <pre><code> mex -O -L/home/pts08/miniconda/envs/_build/lib -I/home/pts08/miniconda/envs/_build/include -lzmq /home/pts08/...
  • <div><p>I have connected a digital to analog converter (DAC) to the Z axis of my new Arduino Uno/GRBL setup. The DAC output is 0 to 5vdc and is used to modulate a 2W 445nm laser diode for grayscale ...
  • <div><p>I made a Hash like that: <pre><code>yaml = {"app"=>{"id"=>...from .gem/ruby/2.7.0/gems/hashie-4.0.0/lib/hashie/extensions/mash/symbolize_keys.rb:33:in `...
  • <div><p>If I'm not mistaken, the path is hardcoded here. ...<p>I rather like what they did here with inheriting the agent py path ...<p>thoughts?</p><p>该提问来源于开源项目:...
  • <div><p><strong>Description</strong></p> <pre><code> Attribute application value=(/ScryptedTheme) from AndroidManifest.xml:37:9-45 ...(/AppTheme). Suggestion: add 'tools:replace=...
  • <div><p>Pencil2D v. 28Mar2018 Win8.1 Pro 64bits 34GB Huion tablet <p>Steps: Use the default user interface 1. Open Pencil2D 2. Go to File > Open and select an animation or single image and load it ...
  • <div><p>When the skirt/brim lines are printed, it is assumed that the polygon at the back of skirt_brim is furthest away from the outline of the model. By adding support brim lines ...
  • acq: Catch NaN SNR

    2020-12-09 00:59:27
    <div><p>Complain loudly, and set to zero before it upsets other systems. <p>/cc 该提问来源于开源项目:swift-nav/piksi_firmware</p></div>
  • Fix checkpatch errors

    2020-12-09 03:05:41
    <div><p>The init functions are declared in a way that upsets checkpatch, this fixes those errors. <p>Fixes #1166 </p><p>该提问来源于开源项目:thesofproject/sof</p></div>
  • 单粒子翻转(SEU,Single-Event Upsets),是在空间环境下存在着大量高能带电粒子,计算机中的电子元器件受到地球磁场、宇宙射线等照射,引起电位状态的跳变,...
        

    单粒子翻转(SEU,Single-Event Upsets),是在空间环境下存在着大量高能带电粒子,计算机中的电子元器件受到地球磁场、宇宙射线等照射,引起电位状态的跳变,“0”变成“1”,或者“1”变成“0”。

    640?wx_fmt=jpeg

    太空探索早期人们已经注意到了这个问题

    在地球表面,有磁场和大气层的保护,能够到达地面的高能粒子很少,一般来说对计算机的影响不大。在计算机设计中,并不需要考虑这种特殊场景。常规的硬件纠错机制配合操作系统,足以应付偶然的计算错误。实在改不过来,大不了蓝个屏,喊个“李姐万岁”也就过去了。

    640?wx_fmt=jpeg

    李姐万岁

    在太空中情况就大不一样了,单粒子翻转发生的概率大得多。

    1995年2月8日发射升空的实践四号卫星上搭载的两台用于单粒子事件测量的监测装置,在入轨后的19天内共发生了65次翻转。

    卫星设计师可不想回答“卫星主控计算机蓝屏是一种什么样的体验”,没人够得着卫星的Reset按钮。核心程序跑飞了,可不一定有挽救的机会。

    看看中国航天曾经踩过的坑(不公开的还不知道有多少……)

    风云一号B星于1990年9月3日成功发射,……运行仅仅两个月后,11月初就遭遇了太阳耀斑发射的高能粒子流,发生了单粒子事件,造成姿态控制计算机程序混乱,无法控制卫星姿态,导致卫星在空间翻转。好在这次事件后计算机程序得到了及时的纠正,卫星恢复了正常运行。1991年2月14日卫星的计算机再一次出现单粒子事件,卫星姿态再次出现异常,这次故障未能及时发现。当发现卫星姿态异常时,卫星上携带的气体已喷完,姿态完全失控,无法拍到云图,本来卫星的设计寿命是要运行一年,但是不到半年卫星就无法工作了。

    事后的分析总结,是在元器件选用和软件设计上留下了未进行抗辐射加固的漏洞,计算机电路芯片在空间高能粒子轰击下容易产生单粒子翻转问题,随时会引发计算机工作失常,姿控系统故障。

    动辄上亿镁的设备,性能达到指标就行,可靠性才是最重要的。

    提高可靠性的方法也很简单粗暴,就是加冗余、加校验。典型的技术是三模冗余( TMR)、纠错码(ECC)等,代价当然是性能的下降。

    除此之外,提升计算性能的先进制程,可能受到单粒子影响更大。而且随着位单元在较小的制程节点中靠得越来越近,单粒子翻转可能会不止一位,这对校验算法提出了更大的挑战。

    所以,星上的计算机芯片性能可能真不如你手机里面的那块。

    通过此文,读者应该彻底理解了校验算法的重要性。点击「阅读原文」,给本文原作者点个赞!

    640?wx_fmt=png

    大拇指长按图片识别二维码

    展开全文
  • Build with -fPIC

    2020-12-02 06:51:27
    <div><p>Opentracing should really default to building a shared lib with -...<p>Lack of -fPIC upsets jaeger-cpp among other things.</p><p>该提问来源于开源项目:opentracing/opentracing-cpp</p></div>
  • This upsets VCR tests that are run in sequence off the same cassette, since they expect every call to be made identically, and caching causes the version api call to be skipped. This PR clears fog&#...
  • t like how it upsets the expected tactile feedback of dragging. <p>I could attempt to add it, if you guys are open to it.</p><p>该提问来源于开源项目:i6mi6/react-native-parallax-scroll-view</p>...
  • EnderIO Configs Reverting.

    2020-12-28 13:29:31
    It upsets the balance within my pack and it is on the verge of being removed from my pack. Any ideas on why it does this? <p>This also on Version 349.</p><p>该提问来源于开源项目:SleepyTrousers/...
  • I've already known that since my writing is awful and my intellect is ordinary, no one would ever like this article, which upsets me and prevents me from a good sleep every day. But ...

     Notes

    Emmmmm... I've already known that since my writing is awful and my intellect is ordinary, no one would ever like this article, which upsets me and prevents me from a good sleep every day. But if I am lucky enough, that if you find it really helpful and would like to quote my words, please clarify the source page http://www.cnblogs.com/zjnu/p/7296589.html anywhere conspicuous. By the way, I'd be greatly appreciated if you pointed out any grammatical mistakes or inaccurate descriptions to me.

    Self-introduction

    I'm a university freshman, a potential member of our ACM school team. Before I started to read this book, I had taught myself basic C++ syntaxes with inheritance, virtual functions, exceptions and namespaces not included. In addition, I learned very basic Java which allows me to do BigInteger arithmetic operations and print the answer. With those fundamentals equipped, I guess that it wouldn't be so difficult to learn Java. I learn it not only for programming contests, but also to have a comprehensive command of it. Plus, I used to be good at English but not now, due to lack of practice. I hope that my English would get improved after reading this masterpiece.

    <body>>>>>>>>>>>>>>>>>>>>>>

    Chapter 1           

    This chapter mainly lead us to the door of the world of Java.

    First, it tells us what Java is. It's not only a programming language, but also a powerful platform.

    Next, the author explains the key features of Java with its buzzwords, which are "simple", "object-oriented", "distributed", "robust", "secure", "architecture neutral", "portable", "interpreted", "high-performance", "multithreaded" and "dynamic".

    After given a concept about Applets, I learned a short history of Java, realizing that Java is based on C++. As time goes by, it's getting more and more mighty.

    At the end of this chapter, the author corrects some common misconceptions about Java. It is precautionary for the flawed thinking we may develop in the future studies.

    Reading the first chapter may bores us, but understanding the content is an essential step before you master Java successfully.

    Chapter 2           

    Chapter 2  roughly teaches us the configuration of the Java Programming Environment and how to compile and run codes with either Command-Line Tools or Integrated Development Environment. The professor claims that:

    If your programming experience comes from using a development environment such as Microsoft Visual Studio, you are accustomed to a system with a built-in text editor, menus to compile and launch a program, and a debugger. The JDK contains nothing even remotely similar. You do everything by typing in commands in a terminal window. This sounds cumbersome, but it is nevertheless an essential skill. When you first install Java, you will want to troubleshoot your installation before you install a development environment. Moreover, by executing the basic steps yourself, you gain a better understanding of what a development environment does behind your back.

    However, after you have mastered the basic steps of compiling and running Java programs, you will want to use a professional development environment.

      I have a similar experience as what he describes. I started to program with Microsoft Visual Studio 2015, which seemed perfect for me. For a pretty long time, I was terribly dependent on it, pleased with its robustness and and its support to the latest C++ standard. My dependency of Visual Studio didn't subside until the day came when I had a sudden whim to have a try of Code::Blocks. It bothered me to fill in with the tedious IDE at first. I could neither put up with its ugly editor nor endure the incomplete C++11 library (I downloaded C::B with MinGW first). What is more, the Auto Complete plugin is dumb (but impossible to fix), the default debugger settings won't show details of STL containers and large-sized arrays. I had two options, to give in and uninstall it or to optimize it myself. I chose the latter. As a matter of fact, I learned the basic structure of an IDE. You will not really learn something if you are always trying to avoid it by pushing it off to someone else. Visual Studio did everything except writing codes for me, so I seldom opened the setting windows. For an eligible programmer, coding important, but stuffs like compiling, debugging and formatting also matters.

     

    Chapter 3           

     

    转载于:https://www.cnblogs.com/zjnu/p/7296589.html

    展开全文
  • <div><p>Is there a reason why units is case sensitive in this case?... and this upsets units. (See sunpy/sunpy#766 and sunpy/sunpy#767)</p><p>该提问来源于开源项目:astropy/astropy</p></div>
  • talk about the senseless

    2015-06-05 13:15:00
    College football assails the senses Let me get it out of the way right off the bat: I love college football. The pageantry. The upsets. The day dr...

    College football assails the senses

    Let me get it out of the way right off the bat: I love college football. The pageantry. The upsets. The day drinking. It has it all. This is the first installment in a series of as many as it takes that will highlight the key games on the college football schedule. Predictions will be based on factual evidence, speculation and deep seeded animosity towards certain programs. The Penguins of Youngstown State are, indeed, members of Brian Cushing Jersey that pesky I AA division and Buckeyes coach Brian Cushing Womens Jersey Jim Tressel used to coach at The Other Ohio State University. But none Authentic Brian Cushing Jersey of that means anything when there's such a talent disparity on the gridiron.

    Feels like: Ohio State 34, Youngstown State 7

    In real life: Ohio State 43, Youngstown State 0

    Terrell Pryor made Authentic Andre Johnson Jersey his much ballyhooed Buckeye debut as Ohio State absolutely disrobed the Penguins. Beanie Wells hurt his foot. He'll be OK. The Badgers like to jump up, jump up and get down, but they always seem to let weaker teams hang around longer than they should.

    Feels like: Wisconsin 31, Akron 17

    In real life: Wisconsin 38, Akron 17

    The Badgers racked up 404 yards Andre Johnson Womens Jersey on the ground. Hill accounted for 210 of them. Research tells me they named their mascot after a feisty rooster in Chaucher's Canterbury Tales. Joe Paterno knew Chaucher, and you, Coastal Carolina, are no Chaucher.

    Feels like: Penn State 61, Coastal Carolina 3

    In real life: Penn State 66, Coastal Carolina 10

    JoePa notches his 373rd career win. Plus, the Orange were 2 10 last season.

    Feels like: Northwestern 24, Syracuse 20

    In real life: Northwestern 30, Syracuse 10

    Can't wait to read Monday's recap in the Daily Northwestern. Out of respect I'll check out the one in the Daily Orange. We won't talk about the senseless violence that happened in New Orleans once they got there. Actually, we should. That's exactly what's going to go down when they invade the Swamp to face Tim Tebow, who functions Andre Johnson Jersey at a much higher level than you are I could ever dream of operating at. Hawaii time. Tim Tebow > pretty much everyone. Cavaliers QB Jameel Sewell can do it with his arm and his legs and possibly other parts. Here's our first upset, folks. Drink it in.


    转载于:https://my.oschina.net/u/2381367/blog/425263

    展开全文
  • <div><p>Before K4.0, using the substitution ...<p>Now the substitution inside <code>prep</code> upsets the parser. So how should I do that?</p><p>该提问来源于开源项目:kframework/k-legacy</p></div>
  • 单粒子效应

    2011-10-18 15:27:05
    单粒子 翻转 We present a new method to estimate Single Event Upsets (SEU) in a hadron accelerator environment, which is characterized by a complicated radiation spectrum. Our method is based on first ...
  • This upsets some message parsers (like the one used by <a href="https://github.com/ANYbotics/rqt_multiplot_plugin">rqt_multiplot), preventing them from displaying the message structure properly. ...
  • Virtex-II datasheet

    2015-08-17 14:13:15
    SEU in GEO upsets with recommended redundancy implementation Certified to MIL-PRF-38535 (Qualified Manufacturer Listing) Guaranteed over the full military temperature range (–5°C to +125°C) 0.15...
  • 19/50.90226/-1.33848 was done by ...C5 upsets the look-up. Brief discussion of this on #osm 2019-02-13 15:21 +0000.</p><p>该提问来源于开源项目:openstreetmap/openstreetmap-website</p></div>
  • Decimals

    2021-01-12 18:57:00
    <div><p>When I click on the decimal part it makes me focus on the integer part ( so do not let me write in decimal ) When writing where it has made me focus upsets me the order of the number as I ...
  • This eliminates the need to escape this sequence in the .json files, which upsets other toolchains. <p>Tested with IAR and GCC_ARM toolchains with the mbed-os-example-blinky example. <p>platform/mbed_...
  • Facades look terrible

    2020-11-27 09:11:35
    <p>This issue really upsets me, as I love the idea of facades but avoid them due to the ugliness. <p><img alt="2013-10-20_13 11 02" src=...
  • <div><p>Seems a quoted empty string upsets ARGV parser. <pre><code> $ bwa mem -t 16 '' -M ref.fasta.gz pairs.fastq | head [E::bwa_idx_load_from_disk] fail to locate the index files $ $ bwa ...
  • <p>It upsets me to put an hour or so into the study of your process to find out late in the game that there are one or more things that don't work (Fonts?).... can't you put that on top of ...

空空如也

空空如也

1 2 3 4 5
收藏数 85
精华内容 34
热门标签
关键字:

upsets