Bidirectional power electronics can add vehicle-to-grid (V2G) capability in a plug-in vehicle, which then allows the vehicle to operate as a distributed resource (DR). The uniqueness of the battery-based V2G power electronics requires a test procedure that will not only maintain IEEE interconnection standards, but can also evaluate the electrical performance of the vehicle working as a DR. The objective of this paper is to discuss a recently published NREL technical report that provides interim test procedures for V2G vehicles for their integration into the electrical distribution systems and for their performance in terms of continuous output power, efficiency, and losses. Additionally, some other test procedures are discussed that are applicable to a V2G vehicle that desires to provide power reserve functions. A few sample test results are provided based on testing of prototype V2G vehicles at NREL.

关键词：电子信息；电子；汽车电网；互联

查看摘要 索取原文[10页]

This document describes a repeatable test procedure that attempts to simulate shading situations, as would be experienced by typical residential rooftop photovoltaic (PV) systems. This type of shading test is particularly useful to evaluate the impact of different power conversion setups, including microinverters, DC power optimizers and string inverters, on overall system performance. The performance results are weighted based on annual estimates of shade to predict annual performance improvement. A trial run of the test procedure was conducted with a side by side comparison of a string inverter with a microinverter, both operating on identical 8kW solar arrays. Considering three different shade weighting conditions, the microinverter was found to increase production by 3.7under light shading, 7.8under moderate shading, and 12.3under heavy shading, relative to the reference string inverter case. Detail is provided in this document to allow duplication of the test method at different test installations and for different power electronics devices.

关键词：电子信息；电子；光伏；模块级

查看摘要 索取原文[32页]

This paper introduces a secure and simple way to set up initial Wi‐Fi configuration for “Internet of Things” based on Wi­‐Fi Protected Setup (WPS) protocol.The “Internet of Things”(IoT) refers to any electronics appliances that can be connected to the local Internet with an embedded Wi­‐Fi chip. To accomplish this configuration, the basic concept is to transfer PIN number, which is a unique number for each device, to smartphones by using out­‐of­‐band signal and extract it based on computer vision technology with a developed Android App.

关键词：电子信息；物联网；Wi-Fi配置；Wi-Fi保护设置

查看摘要 索取原文[22页]

This report covers work done for the Director's Research Initiative (DSI) on Gallium Nitride (GaN) High Power Electronics (HPE) in which GaN devices are assessed in comparison to those fabricated from silicon carbide (SiC). We show that for low power applications (less than 1500 V) GaN diodes should have a lower on-resistance, and therefore less loss, than their SiC counterparts because the critical breakdown field and electron mobility are larger. We expect this will also be true for HPE GaN high electron mobility transistors (HEMTs) compared to SiC metal-oxide-semiconductor field effect transistors (MOSFETs). Although a few GaN devices have been made that have properties that exceed those made from SiC, these devices cannot yet be manufactured. Our work suggests the dominant problem is contamination of the metal-organic chemical vapor deposition (MOCVD) films by the carbon in the trimethyl gallium (TMGa). We suggest a better alternative is to grow the films by hydride vapor phase epitaxy (HVPE), which requires that conducting GaN substrates be grown to reduce the on-resistance (RON-SP) for the back side diodes. We also show that dislocations appear to strongly affect diode properties such as the ideality factor, but their effect on the breakdown voltage appears to be a less significant problem than was previously thought.

关键词：电子信息；电子；氮化镓；晶体管；二级管

查看摘要 索取原文[36页]

关键词：电子信息；固定资产；投资；集成电路；通信设备

查看摘要 索取原文[1页]

PET is an imaging technique for producing a three-dimensional image of the functional processes in the human system. PET scans are increasingly read alongside CT or MRI scans providing information on both anatomic and metabolic information. PET imaging is a powerful tool in combination with anatomical imaging, such as CT and MRI. This has enabled its application in the area of oncology, cardiology, and neurology studies.The Global PET market has been experiencing a steady growth. In 2012, most of the growth in the market stemmed from the Americas and the EMEA region, which together accounted for more than 75 percent of the market. However, the emerging economies of the APAC region, such as China and India, and of Latin America, such as Brazil and Argentina, are expected to grow at a faster pace during the forecast period. The overall market is expected to grow at a CAGR of 3.74 percent during the period 2012-2016.

关键词：PET；人体系统；成像技术；CT或MRI扫描

查看摘要 索取原文[53页]

An ultra-high-definition TV, popularly known as ultra HD TV, displays the picture in two video formats, 4K and 8K. Ultra HD TVs are new and technologically-advanced TVs which deliver the picture by analyzing and refining it with natural detail and astounding color. These TVs generally have a resolution of 3,840 x 2,160 pixels. Some of the blockbuster movies released in the ultra HD format include The Dark Knight Rises, The Karate Kid, Men in Black III, Spiderman 4, and Samsara. Users get a completely different experience watching movies in an ultra HD format, attracting most users to opt for ultra HD TVs.

关键词：超高清电视；视频格式；色彩分析；像素

查看摘要 索取原文[59页]

关键词：高端家电；家电网购；分析报告

查看摘要 索取原文[1页]

关键词：三星；高端电视；UHD；超高清

查看摘要 索取原文[1页]

Micro-size light emitting diode (microLED) arrays based on III- nitride semiconductors have emerged as a promising technology for a wide range of applications. If InGaN microLED arrays can be integrated on to Si complementary metal-oxide-semiconductor (CMOS) substrates for active driving, these devices could play crucial roles in ultra-portable products such as next generation pico-projectors, as well as in emerging fields such as biophotonics and optogenetics. Here we present a demonstration of, and methods for, creating a high resolution solid-state self-emissive microdisplay based on InGaN/GaN semiconductors. An energy efficient active drive scheme is accomplished by integrating micro-emitter arrays with CMOS active matrix drivers that are flip- chip bonded together via indium metal bumps.

关键词：电子信息；LED；微型显示屏；氮化镓

查看摘要 索取原文[9页]