基于FPGA的高频等精度频率计设计与实现

文章介绍了等精度频率计误差分析和实现原理,在Altera新一代FPGA/PLD开发软件QuartusⅡ 中运用硬件描述语言Verilog HDL编程,通过单片机控制EP1 C12Q240I7芯片实现等精度频率计的设计,频率计可通过分频测量800 MHZ～1 400 MHZ之间的高频信号频率,大大提高了测量精度,实验证明测量精度为0.000 03％以下.     

台湾地区“陆资入台”法律制度评析

近20年来,台湾地区的"陆资入台"法律制度历经了从"禁止投资"到"有限制开放"的曲折发展过程。在较长的一段时间里尤其是陈水扁执政期间,"陆资入台"配套立法"缺位",这主要表现在"授权条款"的宽泛性、行政立法的审查力度不足、"朝小野大"及"朝野对立"的政治结构。2008年马英九执政后台湾岛内政治生态的重大转变,直接促使"缺位"现象的快速消解,"陆资入台"法律框架也由此构建。从陆资与侨外资在具体规定上的差距可以看出,台湾现行的陆资对台投资立法仍然存在诸多的歧视性规范。基于海峡两岸目前的现状,歧视性规范的消解将是一个渐进的过程,这或许是"两岸特色"在"陆资入台"问题上的一种体现。     

道家生态智慧与深层生态学之契合

道家提倡"万物与我为一"、"物无贵贱"、"自然无为"的哲学思想不断被人类的道德深化所认同,这些具有明显生态维度的伦理思想,与产生于20世纪70年代的深层生态学所主张的人与自然相统一的生态整体观、尊重自然的生态平等观以及顺应自然的生态实践观高度契合.道家生态伦理思想对现代伦理学的理论突破以及民众生态道德水平的提升具有积极意义.在生态文明型社会的构建中,我们要立足于今天的实践活动,尊重、珍视、挖掘并进一步整合道家生态伦理资源,确立新的生态伦理观,以加快我国生态文明社会建设的步伐.     

汉代医疗保障制度初探

两汉时期为国家医疗保障制度初步发展时期,制度简陋。大体上讲,汉代医疗体系可以分为中央、地方、专门三个层次。中央和地方医疗体系,主要服务于贵族和官员,专门医疗体系是为完成特定职能服务的。民间缺乏医疗保障,只是在发生重大灾害时,中央和地方政府才提供医疗援助。     

Design and analysis considerations for comparing dynamic treatment regimens with binary outcomes from sequential multiple assignment randomized trials

In behavioral, educational and medical practice, interventions are often personalized over time using strategies that are based on individual behaviors and characteristics and changes in symptoms, severity, or adherence that are a result of one's treatment. Such strategies that more closely mimic real practice, are known as dynamic treatment regimens (DTRs). A sequential multiple assignment randomized trial (SMART) is a multi-stage trial design that can be used to construct effective DTRs. This article reviews a simple to use ‘weighted and replicated’ estimation technique for comparing DTRs embedded in a SMART design using logistic regression for a binary, end-of-study outcome variable. Based on a Wald test that compares two embedded DTRs of interest from the ‘weighted and replicated’ regression model, a sample size calculation is presented with a corresponding user-friendly applet to aid in the process of designing a SMART. The analytic models and sample size calculations are presented for three of the more commonly used two-stage SMART designs. Simulations for the sample size calculation show the empirical power reaches expected levels. A data analysis example with corresponding code is presented in the appendix using data from a SMART developing an effective DTR in autism.     

Semiparametric estimation of treatment effect with density ratio model

In this study we propose a unified semiparametric approach to estimate various indices of treatment effect under the density ratio model, which connects two density functions by an exponential tilt. For each index, we construct two estimating functions based on the model and apply the generalized method of moments to improve the estimates. The estimating functions are allowed to be non smooth with respect to parameters and hence make the proposed method more flexible. We establish the asymptotic properties of the proposed estimators and illustrate the application with several simulations and two real data sets.     

A Leadership Training Group for at Risk Fifth & Seventh Graders: Results from A Brief Strength-Based Group Program

ABSTRACT

An increasing number of youth are exhibiting social, emotional, and behavioral problems that hinder their ability to function at grade level. Subsequently, school mental health services have not been able to address the need for services particularly among students who are minority and poor. A mixed methodology study was conducted to determine the treatment outcomes from a brief strength-based leadership training group for primarily students who are African American and poor. Pre–post scores on three scales and focus group data revealed significant positive changes in regard to internal areas of functioning and social skills, anger management skills, and school attitude. Gender and age significantly impacted outcomes.     

职业教育与普通高中教育收入回报之差异

讨论教育回报时,职业教育和普通高中教育之间所存在的实质性区别往往被学者忽略。本文使用中国家庭动态调查2010年基线调查数据来分析职业教育与普通高中教育在收入回报上的差异。结果表明,在控制教育类型的选择性因素和个人工作经验等变量的情况下,接受职业教育者比接受普通高中教育者有更多的收入回报。不过,收入回报的差异随教育世代而变化,改革开放早期接受职业教育者比接受普通高中教育者拥有较高的回报, 1990年后接受职业教育者的收入回报已没有优势。本文认为,职业教育有回报优势源自于他们在高等教育供给不足的特定历史背景下更有可能从事专业技术性工作,而职业教育回报优势的消失则是因为高校扩招所带来的职业教育文凭价值相对降低。     

A generalized Fleming and Harrington's class of tests for interval‐censored data

The class $G^{\rho,\lambda }$ of weighted log‐rank tests proposed by Fleming & Harrington [Fleming & Harrington (1991) Counting Processes and Survival Analysis, Wiley, New York] has been widely used in survival analysis and is nowadays, unquestionably, the established method to compare, nonparametrically, k different survival functions based on right‐censored survival data. This paper extends the $G^{\rho,\lambda }$ class to interval‐censored data. First we introduce a new general class of rank based tests, then we show the analogy to the above proposal of Fleming & Harrington. The asymptotic behaviour of the proposed tests is derived using an observed Fisher information approach and a permutation approach. Aiming to make this family of tests interpretable and useful for practitioners, we explain how to interpret different choices of weights and we apply it to data from a cohort of intravenous drug users at risk for HIV infection. The Canadian Journal of Statistics 40: 501–516; 2012 © 2012 Statistical Society of Canada     

Integrating Art Therapy Methodology in Brief Inpatient Substance Abuse Treatment for Adults

ABSTRACT

Decades of drug addiction research and clinical work have underscored the need for multifaceted and comprehensive treatment responses in order to sufficiently address the varied needs of individuals struggling with addiction. One valuable treatment component that can be incorporated into traditional treatment protocols to expand the comprehensive nature of treatment response is art therapy. A conceptual framework is presented, detailing the integrative opportunities and benefits of including an art therapy component to short-term hospital-based inpatient substance abuse treatment programs. A creative arts component can be particularly beneficial for brief inpatient programs, where the client population is diverse, in crisis, and at high-risk for relapse; and where clinicians need to obtain comprehensive client information from multiple sources in a short amount of time. Art therapy methodology can provide a mechanism for collecting such collateral information for assessment purposes, can be employed to facilitate therapeutic change, and is used to track and document client progress and clinical change over time. Practice guidelines and specific treatment techniques are presented through short case examples.