V-I characteristics of Zener Diode
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This experiment was conducted to plot the V-I characteristics of a Zener diode. Key equipment used includes a Zener diode, DC voltage supplier, breadboard, 100Ω resistor, and connecting wires. Tables of data collected show forward and reverse bias voltages with the corresponding currents. The graph produced has forward voltage on the positive x-axis and reverse voltage on the negative x-axis, with forward current on the positive y-axis and reverse current on the negative y-axis. In forward bias, the Zener diode behaves like a standard diode, while in reverse bias there is a small leakage current until the breakdown voltage is reached, at which point maximum current flows through the Zener diode.
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A p-n junction diode allows current to flow easily in one direction, but blocks it in the other. It is made up of p-type and n-type semiconductor material. In forward bias, current flows when the positive terminal is connected to the p-side and negative to the n-side. In reverse bias, little to no current flows when the connections are reversed. An ideal diode model approximates the diode as having zero resistance in forward bias and infinite resistance in reverse bias.
Three phase shifter appliance
The document is a report on the design of a three phase shifter appliance. It includes chapters introducing the project and describing the need for automation in power systems. It lists the components used in the circuit diagram, including operational amplifiers, transistors, relays, zener diodes and other electrical components. The block diagram and circuit diagram are presented and key components like the comparator, zener diode, and p-n junction are described in detail.
Diode Applications & Transistor Basics
1. The document discusses the V-I characteristics of a p-n junction diode and describes its behavior under zero external voltage, forward bias, and reverse bias.
2. Rectifiers are introduced as circuits that convert AC to DC. Half-wave and full-wave rectifiers are described, including their circuit arrangements and operations. Centre-tap and bridge configurations are covered for full-wave rectification.
3. Zener diodes are discussed as properly doped diodes with a sharp breakdown voltage. They are always connected in reverse bias and have a defined zener voltage.
Microelectronic circuits and devices: chapter one
This document discusses diode models and characteristics. It introduces the ideal diode model and its voltage-current relationship. It then discusses more realistic models that account for the diode's finite voltage drop of around 0.7V. The document explains how to determine the diode constants like the emission coefficient and leakage current by analyzing voltage-current curves. It also discusses how temperature affects the diode's leakage current and voltage characteristics.
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ViewShift: Hassle-free Dynamic Policy Enforcement for Every Data Lake
Dynamic policy enforcement is becoming an increasingly important topic in today’s world where data privacy and compliance is a top priority for companies, individuals, and regulators alike. In these slides, we discuss how LinkedIn implements a powerful dynamic policy enforcement engine, called ViewShift, and integrates it within its data lake. We show the query engine architecture and how catalog implementations can automatically route table resolutions to compliance-enforcing SQL views. Such views have a set of very interesting properties: (1) They are auto-generated from declarative data annotations. (2) They respect user-level consent and preferences (3) They are context-aware, encoding a different set of transformations for different use cases (4) They are portable; while the SQL logic is only implemented in one SQL dialect, it is accessible in all engines.
#SQL #Views #Privacy #Compliance #DataLake
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三.真实教育部学历学位认证（教育部存档！教育部留服网站永久可查）
四.办理各国各大学文凭(一对一专业服务,可全程监控跟踪进度)
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◇面对父母的压力，希望尽快拿到；
◇不清楚认证流程以及材料该如何准备；
◇回国时间很长，忘记办理；
◇回国马上就要找工作，办给用人单位看；
◇企事业单位必须要求办理的
◇需要报考公务员、购买免税车、落转户口
◇申请留学生创业基金
留信网认证的作用:
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2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
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7:个人信誉贷款加10分
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You can see the future first in San Francisco.
Over the past year, the talk of the town has shifted from $10 billion compute clusters to $100 billion clusters to trillion-dollar clusters. Every six months another zero is added to the boardroom plans. Behind the scenes, there’s a fierce scramble to secure every power contract still available for the rest of the decade, every voltage transformer that can possibly be procured. American big business is gearing up to pour trillions of dollars into a long-unseen mobilization of American industrial might. By the end of the decade, American electricity production will have grown tens of percent; from the shale fields of Pennsylvania to the solar farms of Nevada, hundreds of millions of GPUs will hum.
The AGI race has begun. We are building machines that can think and reason. By 2025/26, these machines will outpace college graduates. By the end of the decade, they will be smarter than you or I; we will have superintelligence, in the true sense of the word. Along the way, national security forces not seen in half a century will be un-leashed, and before long, The Project will be on. If we’re lucky, we’ll be in an all-out race with the CCP; if we’re unlucky, an all-out war.
Everyone is now talking about AI, but few have the faintest glimmer of what is about to hit them. Nvidia analysts still think 2024 might be close to the peak. Mainstream pundits are stuck on the wilful blindness of “it’s just predicting the next word”. They see only hype and business-as-usual; at most they entertain another internet-scale technological change.
Before long, the world will wake up. But right now, there are perhaps a few hundred people, most of them in San Francisco and the AI labs, that have situational awareness. Through whatever peculiar forces of fate, I have found myself amongst them. A few years ago, these people were derided as crazy—but they trusted the trendlines, which allowed them to correctly predict the AI advances of the past few years. Whether these people are also right about the next few years remains to be seen. But these are very smart people—the smartest people I have ever met—and they are the ones building this technology. Perhaps they will be an odd footnote in history, or perhaps they will go down in history like Szilard and Oppenheimer and Teller. If they are seeing the future even close to correctly, we are in for a wild ride.
Let me tell you what we see.
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5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
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2、国（境）学习人员提供就业推荐信服务
3、留学人员区块链存储服务
→ 【关于价格问题（保证一手价格）】
我们所定的价格是非常合理的，而且我们现在做得单子大多数都是代理和回头客户介绍的所以一般现在有新的单子 我给客户的都是第一手的代理价格，因为我想坦诚对待大家 不想跟大家在价格方面浪费时间
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Open Source Contributions to Postgres: The Basics POSETTE 2024
Postgres is the most advanced open-source database in the world and it's supported by a community, not a single company. So how does this work? How does code actually get into Postgres? I recently had a patch submitted and committed and I want to share what I learned in that process. I’ll give you an overview of Postgres versions and how the underlying project codebase functions. I’ll also show you the process for submitting a patch and getting that tested and committed.
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一比一原版(UCSB文凭证书)圣芭芭拉分校毕业证如何办理
毕业原版【微信:176555708】【(UCSB毕业证书)圣芭芭拉分校毕业证】【微信:176555708】成绩单、外壳、offer、留信学历认证（永久存档真实可查）采用学校原版纸张、特殊工艺完全按照原版一比一制作（包括：隐形水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠，文字图案浮雕，激光镭射，紫外荧光，温感，复印防伪）行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备，十五年致力于帮助留学生解决难题，业务范围有加拿大、英国、澳洲、韩国、美国、新加坡，新西兰等学历材料，包您满意。
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2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分
8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
留信网服务项目：
1、留学生专业人才库服务（留信分析）
2、国（境）学习人员提供就业推荐信服务
3、留学人员区块链存储服务
→ 【关于价格问题（保证一手价格）】
我们所定的价格是非常合理的，而且我们现在做得单子大多数都是代理和回头客户介绍的所以一般现在有新的单子 我给客户的都是第一手的代理价格，因为我想坦诚对待大家 不想跟大家在价格方面浪费时间
对于老客户或者被老客户介绍过来的朋友，我们都会适当给一些优惠。
选择实体注册公司办理，更放心，更安全！我们的承诺：客户在留信官方认证查询网站查询到认证通过结果后付款，不成功不收费！
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- 2. at the junction. The electron hole pair generation takes place and heavy current flows. Breakdown: There is a limit for the reverse voltage can increase until the diode breakdown voltage reaches. This point is called Avalanche Breakdown region. At this stage maximum current will flow through the zener diode. This breakdown point is referred as “Zener voltage”. 3. Equipment A. A zener diode B. A DC voltage supplier C. Bread board D. 100Ω resistor E. Connecting wires 3. Circuit Diagram Figure: V-I characteristics ofZener Diode 5. Data Collection: Table for forward-bias voltage and forward current: Forward bias Voltage (V) Forward Current If(mA) 0.0 0 0.2 0.001 0.3 0.002
- 3. 0.6 0.5 0.7 1.1 0.8 2.2 1.0 3 1.2 5.1 1.4 7.5 1.6 10 1.8 15 2.0 20.4 2.2 25.3 2.4 30 Table for reverse-bias voltage andreverse current: Reverse bias Voltage(v) Reverse current (A) 0 0 0.5 1.1 7.1 2.33 9.1 3 11.1 4 13.1 5.5 15.1 7 17.1 9.2 19.1 11 21.1 13.7 23.1 15 25.0 25 Graph Graph (Instructions):
- 4. 1. Take a graph sheet and divide it into 4 equal parts. Mark origin at center of the graph sheet. 2. Now mark + ve x-axis as Vf - Ve x-axis as Vr + Ve y-axis as If - ve y-axis as Ir
- 5. . 7. Discussion The illustration above shows this phenomenon in a current vs voltage graph with a zener diode connected in the forward direction .It behaves exactly asa standard diode. In the reverse direction however there is a very small leakage c urrent between 0v and the zener voltage –i.e. just a tiny amount of currentis able to flow. .