4H-SiC肖特基微型同位素电池(英文)

半导体同位素电池由于其寿命长、集成性优良、环境适应性强等特点成为解决MEMS能源问题的理想手段。利用4H-SiC材料的宽禁带特性,制造了4H-SiC肖特基同位素电池。对电池的耗尽层厚度以及掺杂浓度进行了优化设计,对肖特基金属进行了选择。使用4mCi/cm2的63Ni作为同位素电池的放射源对制造的同位素电池进行了测试。测试结果表明,该同位素电池可以获得31.3nW/cm2的功率密度、0.5V的开路电压、3.13×10-8A/cm2的短路电流密度和1.3%的转换效率。将电池的输出特性和硅基的平板型、3D结构电池输出特性进行了比较,证明4H-SiC肖特基同位素电池能够获得较高的功率密度。电池的性能可通过提升势垒高度、提高工艺质量、更换同位素等方式得到提高。     

基于无线数据业务智能优化系统算法的研究与应用

针对业界GPRS/EDGE无线数据优化方法、算法不完善,工作效率低的问题,广西联通通过长期研究建立了一套优化经验方法和较适合现网的参数配置、算法,并将这套方法、算法应用到自主开发的无线数据业务智能优化系统中,使系统实现自动采集分析数据、自动提供优化方案、自动执行优化方案、自动生成优化报告功能,使无线数据业务优化工作朝着智能化方向迈进。     

Glass crystallization making red phosphor for high-power warm white lighting

Rapid development of solid-state lighting technology requires new materials with highly efficient and stable luminescence, and especially relies on blue light p...     

A Novel Human Antibody,HF, against HER2/erb-B2 Obtained by a Computer-Aided Antibody Design Method

Fully human antibodies have minimal immunogenicity and safety profiles. At present, most potential antibody drugs in clinical trials are humanized or fully human. Human antibodies are mostly generated using the phage display method (in vitro) or by transgenic mice (in vivo); other methods include B lymphocyte immortalization, human–human hybridoma, and single-cell polymerase chain reaction. Here, we describe a structure-based computer-aided de novo design technology for human antibody generation. Based on the complex structure of human epidermal growth factor receptor 2 (HER2)/Herceptin, we first designed six short peptides targeting the potential epitope of HER2 recognized by Herceptin. Next, these peptides were set as complementarity determining regions in a suitable immunoglobulin frame, giving birth to a novel anti-HER2 antibody named “HF,” which possessed higher affinity and more effective anti-tumor activity than Herceptin. Our work offers a useful tool for the quick design and selection of novel human antibodies for basic mechanical research as well as for imaging and clinical applications in immune-related diseases, such as cancer and infectious diseases.     

基于GPRS的风电并网稳定控制系统

研究了风电场并网存在的稳定问题,针对风电场通信通道的特殊性,研制了基于GPRS的风电场并网稳定控制系统,实现了风电并网的有功潮流和无功电压的综合自动控制.系统应用GPRS实现了如下通信功能:数据缓冲功能、心跳报文功能、自动重拨功能、数据标识功能、软硬件看门狗功能.该系统的主要功能包括:过载切机;低压切机;高频切机;系统运行状态接近稳定极限时,若风机出力波动幅度持续较大,切除风电机组;根据系统关键断面潮流的情况实时调整风机出力的上限;依据风电场并网节点母线电压水平,控制风电场无功补偿设备的投切.最后,介绍了风电场并网稳定控制系统在阜新电网的应用.     

Breast Fibromatosis after Hydrophilic Polyacrylamide Gel Injection for Breast Augmentation: a Case Report and Review of the Literature

BREAST fibromatosis is a rare kind of lesion.The average incidence is about 2-4 per million every year.1 So far there have been about 100 cases reported altogether.2 In this report, we describe a case of breast fibromatosis developed after hydrophilic polyacrylamide gel (HPG) injection for breast augmenta-Received for publication December 10, 2010.     

水处理剂用量对缓蚀阻垢性能的影响

冷却水长期循环使用后,会出现腐蚀、结垢、微生物滋生等问题,影响系统的正常运行。通过对循环冷却水系统进行合理的水质处理,同时采用腐蚀在线监测技术对系统的腐蚀状况进行监测,保证了循环水系统安全、稳定运行。     

Failure detection in automotive light assemblies during vibration endurance testing

As the automotive industry becomes increasingly competitive, parts manufacturers are under extreme pressure to improve the quality of their parts, while at the same time reducing costs. The method currently used to detect failures in automotive light assemblies during vibration endurance testing involves manual inspection only after the test is completed. In most cases, this method does not allow the first onset of failure to be determined. Subsequent damage caused by the ongoing test after the initial failure often obliterates the clues to what failed first, thus diminishing the usefulness of the information collected as input to design improvement iterations. An adaptable, reliable, and low-cost real-time monitoring and diagnostic system that would interrupt the testing operation at the first onset of a failure is desired. This paper describes an accelerometer-based and a microphone-based monitoring system for automotive light assembly failure detection during endurance testing. The vibration and acoustic signal analysis methods are also described. Preliminary results from these two systems show a significant difference between healthy and faulty fog light assemblies, which can be detected. This suggests that there is potential to develop these and potentially other measures for use in an adaptable, reliable, and low-cost real-time monitoring and diagnostic system that would interrupt the testing operation at the first onset of a failure. Further testing is planned to determine the sensitivity of the methods used in this study to detect the earliest onset of failure damage during endurance testing of automotive light assemblies.     

基于DSP控制的ZVZCS型DC-DC变换器设计

本文设计了一款全桥ZVZCS型DC—DC变换器,给出了变换主电路的关键元器件的选型。该变换器以TMS320F2812为核心控制芯片,实现了电压电流双闭环调节控制,且具有输出过流、过压、以及功率管过热保护功能。仿真结果验证了ZVZCS的软开关工作模式。