方波信号发生器及场效应管驱动器

本文介绍方波信号发生器及场效应管驱动器的原理与设计。实验证明,设计的方波信号发生器与场效应管驱动器工作稳定可靠,所研制的方波交流高频弧焊电源已成功地对薄钢板进行了焊接。     

一种用于基波测量的数字校准方法

在电力系统中,相量测量的精度主要受到信号采样通道元器件误差和软件采样同步误差的影响。分析和实验表明,不同量程同步采样经幅值校准后拟合的方法改进了相量幅值测量的精度,对各相量进行相位校准的方法克服了相量采样的同步误差。综合应用2种方法,提出了基波相量幅值校正和相位校正的数字校准方法,对输入信号采用不同放大倍数调理电路进行分段处理和A／D采样,经幅值校准后拟合,以及对各相量进行相位校准均改进了电力系统电压和电流的测量精度。最后介绍了该方法在微机保护装置中的应用及其检测结果。     

Case formulation in EFT.

A case formulation, for a client with depression, based on emotion-focused therapy treatment principles will be presented. The client was seen for 16 sessions in emotion-focused therapy. Based on information provided in the first interview, the therapist discusses how the client’s issues can be formulated in an emotion-focused treatment by attending to different process markers, including markers of characteristic styles of being or ways of treating the self and emotional experience; modes of engagement or ways that emotional experience is processed in terms of whether it is overregulated or underregulated; specific in-session tasks like focusing, two-chair or empty chair work; and micromarkers of nonverbal behaviors including vocal quality. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

一种双匹配动态调度算法

提出了适于异构环境独立任务调度的双匹配动态调度算法（BM算法）．BM算法将任务与处理机实现双匹配，使大部分任务在执行时间最短而且完成时间最早的处理机上执行．对于无法实现双匹配的任务，采用最早完成时间最小者优先的策略进行调度．BM算法可以同时满足负载均衡和高吞吐率两个目标．BM算法与通常用作评测基准的Min-min算法的比较结果表明，BM算法的运行时间远少于Min-min算法，其调度跨度比Min-min算法减少约9％．     

Security services for applications of OSI in banking

The protection of financial information has always been critical to success in banking. Security has become much more visible now that the automation and interconnection of banking processes is becoming widespread. Most financial institution are moving towards international systems interworkng, eventually using products based on the Open Systems Interconnection model. Thus, it is essential that basic security services be incorporated into the OSI architecture. This paper reviews security needs for banking communications, surveys on-going standardization work in TC68 (Banking) and TC97/SC21, and concludes that the planned security services in OSI should satisfy banking requirements if completed quickly.     

基于瑞萨QzROM单片机的EFT抗干扰措施

主要介绍了瑞萨QZROM单片机应用中的几种EFT抗干扰措施.     

线性电源适配器解决EFT的改进电路

在某固定无线电话机的入网测试过程中,电快速瞬变脉冲群(EFT)项目是EMC测试中的必测项目,12V线性适配器配合该话机测试不通过.本文描述了电路的改进过程和原理.     

Correlated In Situ Low‐Frequency Noise and Impedance Spectroscopy Reveal Recombination Dynamics in Organic Solar Cells Using Fullerene and Non‐Fullerene Acceptors

Non‐fullerene acceptors based on perylenediimides (PDIs) have garnered significant interest as an alternative to fullerene acceptors in organic photovoltaics (OPVs), but their charge transport phenomena are not well understood, especially in bulk heterojunctions (BHJs). Here, charge transport and current fluctuations are investigated by performing correlated low‐frequency noise and impedance spectroscopy measurements on two BHJ OPV systems, one employing a fullerene acceptor and the other employing a dimeric PDI acceptor. In the dark, these measurements reveal that PDI‐based OPVs have a greater degree of recombination in comparison to fullerene‐based OPVs. Furthermore, for the first time in organic solar cells, 1/f noise data are fit to the Kleinpenning model to reveal underlying current fluctuations in different transport regimes. Under illumination, 1/f noise increases by approximately four orders of magnitude for the fullerene‐based OPVs and three orders of magnitude for the PDI‐based OPVs. An inverse correlation is also observed between noise spectral density and power conversion efficiency. Overall, these results show that low‐frequency noise spectroscopy is an effective in situ diagnostic tool to assess charge transport in emerging photovoltaic materials, thereby providing quantitative guidance for the design of next‐generation solar cell materials and technologies.     

Energy psychology: A review of the preliminary evidence.

Energy psychology utilizes imaginal and narrative-generated exposure, paired with interventions that reduce hyperarousal through acupressure and related techniques. According to practitioners, this leads to treatment outcomes that are more rapid, powerful, and precise than the strategies used in other exposure-based treatments such as relaxation or diaphragmatic breathing. The method has been exceedingly controversial. It relies on unfamiliar procedures adapted from non-Western cultures, posits unverified mechanisms of action, and early claims of unusual speed and therapeutic power ran far ahead of initial empirical support. This paper reviews a hierarchy of evidence regarding the efficacy of energy psychology, from anecdotal reports to randomized clinical trials. Although the evidence is still preliminary, energy psychology has reached the minimum threshold for being designated as an evidence-based treatment, with one form having met the APA Division 12 criteria as a "probably efficacious treatment" for specific phobias; another for maintaining weight loss. The limited scientific evidence, combined with extensive clinical reports, suggests that energy psychology holds promise as a rapid and potent treatment for a range of psychological conditions. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

A case of depression: Introducing David.

A brief overview of the client, David, is presented. David participated in a short-term emotion-focused therapy for the treatment of depression. In this paper the client’s presenting problems and history are described to provide a context for the brief excerpt that follows. The excerpt is taken from his first session of psychotherapy and was used by the four different therapists to develop a case formulation illuminating their specific orientation so that these could be contrasted and compared. (PsycINFO Database Record (c) 2010 APA, all rights reserved)