11 2018 档案

2018.11.29 射频基础2

摘要：5滤波器：二项式：单调的衰减曲线，但无法实现陡峭的过度衰减变化。切比雪夫：衰减曲线的纹波在通带和阻带内保持相等的幅度。椭圆函数：通带和阻带间的过度变化最陡峭，但有纹波，实现比较复杂、影响参数： RF插入损耗：描述功率响应幅度和0dB基准的差值。波纹：响应幅度的最大小值之差，表征平坦度。带阅读全文

posted @ 2018-11-30 19:28 keep1 阅读(203) 评论(0) 推荐(0)

L183 Chinese company unveils first satellite for free WiFi

摘要：A Chinese internet technology company unveiled the first satellite in a constellation plan to provide free WiFi service worldwide on Tuesday, followin 阅读全文

posted @ 2018-11-30 08:45 keep1 阅读(1333) 评论(0) 推荐(0)

2018.11.28 RF基础1

摘要：1 射频元件高频电阻：高频电容：高频电感： 2 传输线 a 传输线效应：阻抗，3M法则。 b 同轴线：RF中用 c 微带线：常用： 1/4变换线回波损耗：用网络分析仪测量插入损耗：传输功率和输入功率之比，工程测量可得。输入阻抗公司： 3 Smith图 a 用ADS仿真即可 b data 阅读全文

posted @ 2018-11-29 17:02 keep1 阅读(209) 评论(0) 推荐(0)

2018.11.29 Wireless technology roadmap(1)

摘要：1物联网还是卖开发板阶段. BT NBIoT 窄带物联网（Narrow Band Internet of Things） Sigfox Zigbee Wifi：大数据量传输 LoRA ：远距离无线电（Long Range Radio），工作频率：ISM 频段包括433、868、915 MH等。阅读全文

posted @ 2018-11-29 13:37 keep1 阅读(298) 评论(0) 推荐(0)

L181 The microscopic structure of a cat’s tongue helps keep its fur clean

摘要：T.S. eliot's mystery cat, Macavity, besides being a criminal mastermind able to evade the combined ranks of British law enforcement, had a coat that w 阅读全文

posted @ 2018-11-28 09:00 keep1 阅读(250) 评论(0) 推荐(0)

2018.11.27 元器件选型(1)- 蜂鸣器,电池,电阻,电容，电感

摘要：1.蜂鸣器Buzzer 关键参数： D12mm, H9mm 封装尺寸 : 要根据PCB板大小选封装 Magnetic Transducer 电磁：根据价格和应用场景选类型，有源的比无源的贵。 2,400Hz 驱动频率, 单片机I/O 控制，可以通过PWM控制，也可以用高低电平控制(不推荐，可靠性不阅读全文

posted @ 2018-11-27 21:06 keep1 阅读(1236) 评论(0) 推荐(0)

L180

摘要：The cylinder is a crucial part of the washing machine His debonair dismissal of my inquiry concerning his financial situation led me to believe that n 阅读全文

posted @ 2018-11-27 15:46 keep1 阅读(217) 评论(0) 推荐(0)

L178 smart meter watchdog

摘要：There is "no realistic prospect" of the government meeting its own deadline to install smart meters, according to the National Audit Office (NAO).The 阅读全文

posted @ 2018-11-27 08:44 keep1 阅读(129) 评论(0) 推荐(0)

2018.11.25 词汇课一

摘要：在不同的使用场景中，对词汇的要求不同。 1阅读词汇：篇章语意，以读懂长难句为主 2完型填空词汇：动词词组，介词词组，关键是语法和近义词辨析，考的都是名词动词和介词 3短文完成：近义词辨析长难句 4写作词汇：句子结构写作词汇- 多找替代词 5翻译: 词性转换一：构词法 A常见前后缀： 1 阅读全文

posted @ 2018-11-26 18:43 keep1 阅读(148) 评论(0) 推荐(0)

L177 Arctic ice brings an understanding of ancient Europe’s economy

摘要：Greenland's icy mountains are not an obvious place to search for an archive of economic history, but a study just published in the Proceedings of the 阅读全文

posted @ 2018-11-24 10:53 keep1 阅读(392) 评论(0) 推荐(0)

2018-职业规划

摘要：职业价值观：你为什么而工作？钱？ NO，我不爱钱，现在赚钱只是为了结婚，为了给家里一个基本小康的生活条件。基于兴趣?- 热爱技术-- 你真正热爱技术吗？还能专研吗？工作中有没有想过要偷懒？ -是的，工作中也想偷懒，RF design 做的很吃力，电源研发基础不够，现在的方案很勉强，软件上依赖阅读全文

posted @ 2018-11-23 20:52 keep1 阅读(199) 评论(0) 推荐(0)

2018.11.23 Cypress BLE module test

摘要：CYx63BPA BLE module IQC test guide Test Jig setting:1. Connect USB1 and USB2 with computer serial port （Usb1：COM2, Usb2：Com 3） 2. RF wireless connect 阅读全文

posted @ 2018-11-23 18:11 keep1 阅读(138) 评论(0) 推荐(0)

L175 Endorestiform Nucleus: Scientist Just Discovered a New Part of the Human Brain

摘要：The newly named Endorestiform Nucleus sits in the inferior cerebellar小脑 peduncle, at the junction between the brain and spinal cord. The inferior cere 阅读全文

posted @ 2018-11-23 09:48 keep1 阅读(281) 评论(0) 推荐(0)

L173

摘要：Technical problems temporarily blocked some US and European users having access to their accounts and on Tuesday prevented advertisers launching or ma 阅读全文

posted @ 2018-11-22 08:56 keep1 阅读(200) 评论(0) 推荐(0)

L172 K-kilogram

摘要：In a historic vote, nations on Friday unanimously approved a groundbreaking overhaul to the international system of measurements that underpins 支持 glo 阅读全文

posted @ 2018-11-21 08:39 keep1 阅读(125) 评论(0) 推荐(0)

2018 股市回顾

摘要：1月吹白马价值风买了韶钢松山 +7% 卖出一半 2月上半月大跌-信托-质押到期韶钢松山-4% 年后大涨两天买青龙管业+3 3月次新股和雄安题材买佳都 -5% 高开的时候不适合买。。。。月底打贸易战-全线跌，芯片股涨- 买全志科技+7% 卖空了，后续该票涨了37% 4开贸易战- 大利阅读全文

posted @ 2018-11-20 18:16 keep1 阅读(485) 评论(0) 推荐(0)

L171

摘要：As much as we thirst for approval, we dread condemnation.我们渴望赞许，同样也害怕受到指责。If somebody's father was one of those guys that wear those suits with very b 阅读全文

posted @ 2018-11-17 13:56 keep1 阅读(264) 评论(0) 推荐(0)

2018.11.17 考

摘要：能停就停，能帮就帮，能让就让。只有违法，没有违章。人行横道不能停车和调头。酒驾和无照，只扣12分。仪表图像看清楚，安全带，减伤害，头枕护颈部。高速上，遇雪雾，能见度200米，60码，距离100米。 100米，40码，距离50米。 50米，下高速，20码不能停。右转让左转，转弯让直行。下阅读全文

posted @ 2018-11-17 10:30 keep1 阅读(208) 评论(0) 推荐(0)

L170 Autism Linked to Zinc Deficiency in Childhood

摘要：While the exact cause of autism is unknown, its development in children has been linked to various genetic and environmental factors—including zinc de 阅读全文

posted @ 2018-11-17 09:35 keep1 阅读(156) 评论(0) 推荐(0)

2018.11.16 长难句4

摘要：例句： only those who take leisurely what the people of the world are busy about can be busy about what the people of the world take leisurely只有那些能够闲世人之所阅读全文

posted @ 2018-11-16 19:54 keep1 阅读(151) 评论(0) 推荐(0)

2018.11.16 RX- IC

摘要：1. IC内部组成： Reference Oscillator：基准参考晶振-后续会放大32 倍 Comparator：比较器，输出RF信号 control logic：控制晶振倍频，控制LF，power模块。 data Filter：（loop filter）环路滤波器，属于encode的一个模阅读全文

posted @ 2018-11-16 18:58 keep1 阅读(203) 评论(0) 推荐(0)

L169 Komodo dragons

摘要：Komodo dragons live on a handful of islands in Indonesia, but their reputation has spread far and wide. Reaching lengths of up to 10 feet, the razor-t 阅读全文

posted @ 2018-11-16 08:25 keep1 阅读(220) 评论(0) 推荐(0)

2018.11.15 RF antenna impedance-matching

摘要：We have studied the impedance-matching of RF transmission line between the antenna and the RX / TX module today. 1. RX Sensitivity testing After the a 阅读全文

posted @ 2018-11-15 21:14 keep1 阅读(220) 评论(0) 推荐(0)

2018.11.14 Chopin’s

摘要：The lineaments of Chopin’s肖邦 short, dramatic life are familiar to most classical-music enthusiasts. Born in 1810 in Warsaw to a middle-class family, h 阅读全文

posted @ 2018-11-14 08:44 keep1 阅读(160) 评论(0) 推荐(0)

2018.11.13 N4010A 通信设置

摘要：设置电脑之IP地址及Subnet mask. IP address: 192.168.1.2 Subnet mask: 255.255.255.0, 其它选项为默认. 然后点击OK. - 运行Agilent Connetction Expert（I/O）程序. - 单击鼠标右键, 并选择Add In 阅读全文

posted @ 2018-11-13 17:44 keep1 阅读(611) 评论(0) 推荐(0)

2018.11.12 RF debug

摘要：1 SG setting 2 Date 3 0-1 4 ASK 5 Power supply 6 SG - filter 7 NRF905- demodulation 8 RX test 9 crystal fq test 10 Data analysis 阅读全文

posted @ 2018-11-12 20:17 keep1 阅读(196) 评论(0) 推荐(0)

2018.11 企业战略课堂笔记4 -内部条件分析

摘要：1雷达图分析 2营销能力分析在完整产品上做功夫。 3资源优势一企业资源（有形资源，无形资源，人力）二价值链分析 4组织效能分析最优效能-在扩大规模时和管理成本增加中找到平衡 5核心能力财务状况：查上市公司财报，行业协会报告，咨询公司调查报告设计水平：营销能力质量状况阅读全文

posted @ 2018-11-12 19:44 keep1 阅读(249) 评论(0) 推荐(0)

2018.11 企业战略课堂笔记3 五力模型

摘要：1行业竞争强度行业利润垄断-寡头-充分竞争市场增长率固定费用和存储费用产品差异性及转换成本退出障碍：重资产 2潜在进入者：护城河进入门槛持续竞争优势规模经济产品差异和用户的忠诚资本要求转换成本：使用习惯销售渠道：网店特许经营线下渠道经销商政府政策：双创支持贷款支阅读全文

posted @ 2018-11-12 19:32 keep1 阅读(435) 评论(0) 推荐(0)

2018.11 企业战略课堂笔记2 SWOT-4C战略

摘要：1因素列表 2分析过程：重要的是逻辑推理过程 3 4C战略阅读全文

posted @ 2018-11-12 19:06 keep1 阅读(395) 评论(0) 推荐(0)

2018.11 企业战略课堂笔记1 概论

摘要：1（总）公司战略一体化：并购纵向一体化：生产和经营过程相互衔接、紧密联系的企业之间实现一体化，按物资流动的方向又可分为前向一体化和后向一体化。横向一体化：与处于相同行业、生产同类产品或生产工艺相近的企业实行联合。混合一体化：处于不同产业部门、不同市场且相互之间没有特别的生产技术联系的企业之间的联阅读全文

posted @ 2018-11-12 17:07 keep1 阅读(205) 评论(0) 推荐(0)

L167

摘要：阅读全文

posted @ 2018-11-12 13:29 keep1 阅读(150) 评论(0) 推荐(0)

L166

摘要：THE idea of underwater mining is not restricted to the ocean floor (see article). High water tables submerge many terrestrial deposits, too. At minimu 阅读全文

posted @ 2018-11-12 09:53 keep1 阅读(239) 评论(0) 推荐(0)

208.11 RF test

摘要：1) filter (not related); 2) Crystal (in progress); 3) IC; 4) Antenna. (not related) The three most basic modulation methods (amplitude modulation, fre 阅读全文

posted @ 2018-11-10 10:56 keep1 阅读(172) 评论(0) 推荐(0)

L165

摘要：New evidence of how the Norse became long-distance marinersAccording to the saga of Erik the Red, “shipworm will not bore into the wood which has been 阅读全文

posted @ 2018-11-10 08:47 keep1 阅读(278) 评论(0) 推荐(0)

L164

摘要：“TAKE ONLY memories, leave only footprints” is more than a hiking motto at the Sagarmatha National Park in Nepal. The large box of rocks sitting next 阅读全文

posted @ 2018-11-08 10:08 keep1 阅读(184) 评论(0) 推荐(0)

L163

摘要：Chickens slaughtered in the United States, claim officials in Brussels, are not fit to grace European tables. No,say the Americans: our fowl are fine, 阅读全文

posted @ 2018-11-01 18:07 keep1 阅读(373) 评论(0) 推荐(0)

L162

摘要：More than 250 corporate signatories joined together to try and deal with plastic pollution in an announcement timed to coincide with the 5th Annual "O 阅读全文

posted @ 2018-11-01 08:26 keep1 阅读(350) 评论(0) 推荐(0)

11 2018 档案

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