具有复杂边界媒质中环天线的研究

提出了有限长金属圆柱的长椭球等效,结合微扰法和佳点积分法,较好地解决了具有复杂边界媒质中环天线附近存在有限长金属圆柱时的辐射问题.该方法能节省大量的计算时间.     

Swedish industrial policy planning— A workshop report, Stockholm, 6–7 March 1980

The Society for Long Range Planning is one of six European member societies of EPLAF, the European Planning Federation. The recent discussions in Stockholm arranged by SORA, the Swedish Operations Research Association, proved to be of great interest when set against the European scene, and the U.K. delegates were able to contribute in full measure to the discussions which interspersed the formal presentations given by speakers representing Swedish organizations and closely involved in various aspects of industrial policy making.     

“形而上学“及其在文化重建过程中的意义考察

随着自然科学以及由其产生的现代技术对于世界的影响日益增大,哲学尤其是哲学中的"形而上学"遂被视为过时或甚至根本无意义.在此一背景之下,身处转型期的国人也不加区分地追逐所谓的反"形而上学"潮流.这种对于"形而上学"的态度是不公平也是不正确的.实际上,"形而上学"对于人、文化特别是文化的重建决非可有可无,而是不可或缺.     

Sexual activity and risk taking in young heterosexual men: the relevance of sexual arousability, mood, and sensation seeking

In this research we explored three aspects of personality relevant to sexual activity and sexual risk taking in heterosexual men. Men with low inhibition of sexual arousal in the face of risk (low SIS2) reported more partners with whom they use no condoms and more lifetime "one night stands." Men who experience increased sexual interest in states of depression (MSQ) reported more partners in the past year and more one night stands. The disinhibition subscale of the Sensation Seeking Scale was predictive of whether sexual intercourse had occurred in the past 6 months, and also of the number of sexual partners in the past year. A measure of an intention to practice safer sex was strongly related to measures of sexual arousability and inhibition (SIS/SES). We discuss some clear similarities and also some interesting differences with a parallel study of gay men. Individual differences in sexual excitation and inhibition proneness and the relation between mood and sexuality are clearly relevant to high-risk sexual behavior and should be taken into consideration when designing behavioral interventions.     

浙东唐诗之路上的“胡声”

浙东地处陆上丝绸之路与海上丝绸之路的交会之处,其独特的地理区位和自然人文环境吸引了丝绸之路上活跃的胡人。唐代有不少西域胡僧、胡商曾进入浙东传法、兴贩;浙东官员中也有不少西域胡族,有的还著籍于此成为地方士族;还有不少胡族文人因为浙东自然山水和人文景观慕名而来漫游、隐居。浙东本土胡族文学家族和流寓胡族文人的文学创作给浙东文坛增添了特别的“胡声”。浙东唐诗之路上的胡风、胡音创造了唐代胡汉文学和文化交流融合的新典范。     

条块结对:脱贫攻坚同乡村振兴有效衔接的经验阐释

巩固拓展脱贫攻坚成果,实现脱贫攻坚同乡村振兴的有效衔接,需要总结脱贫攻坚中的实践创新案例。作为中国政治制度中的实践创新典范,条块结对能够整合资源、调整科层流程,从而实现治理目标。采用无结构观察法和深度访谈法,对中部S省Q县的考察发现:在脱贫攻坚过程中,部门与村庄结对形成任务型行动共同体,以项目进村为工作核心,通过定目标、结对子、谈项目、抓落实来完成相应的脱贫任务。在部门进村过程中,条块结对利用资源整合与科层压缩两种机制,通过对项目的合成、借用与转化来回应脱贫任务下的压力考核。在全面推进乡村振兴的过程中,需要继续发挥结对的治理优势,但面对整合与压缩后的基层治理场域,则需要关注因资源与权力过密可能存在的项目持续与治理内卷风险。     

Employee health service for teaching and nonteaching staff: A needs assessment

This paper reports the results of a needs assessment conducted for an Employee Health Service in a metropolitan school district. Survey questionnaires were distributed to the entire district staff with a return rate of 49% (n = 2,268). In order to identify the subgroups of employees who may be at greatest health risk, data were analyzed utilizing an Automatic Interaction Detection Analysis technique. As a means of determining whether particular subgroups perceive stress differentially, multivariate analyses of variance were also performed. Results indicate that "degree of stress" is the health risk variable which can best differentiate employees on the basis of health risk predictors. In general, for teachers, coping ability differentiates those who have high versus low stress, whereas for nonteachers, satisfaction with social support shows the strongest relationship to stress. Furthermore, classification of individuals by job category results in the most pronounced differences between groups on ten stress subdomains. Overall, task-based stress is deemed to be the most stressful of the subdomains. Results are discussed with regard to planning prevention and intervention efforts.     

Multivariate time series projections of parameterized age-specific fertility rates

1 solution to the dimensionality problem raised by projection of individual age-specific fertility rates is the use of parametric curves to approximate the annual age-specific rates and a multivariate time series model to forecast the curve parameters. Such a method reduces the number of time series to be modeled for women 14-45 years of age from 32 to 40 (the number of curve parameters). In addition, the curves force even longterm fertility projections to exhibit the same smooth distribution across age as historical data. The data base used to illustrate this approach was age-specific fertility rates for US white women in 1921-84. An important advantage of this model is that it permits investigation of the interactions among the total fertility rate, the mean age of childbearing, and the standard deviation of age at childbearing. In the analysis of this particular data base, the contemporaneous relationship between the mean and standard deviation of age at childbearing was the only significant relationship. The addition of bias forecasts to the forecast gamma curve improves forecast accuracy, especially 1-2 years ahead. The most recent US Census Bureau projections have combined a time series model with longterm projections based on demographic judgment. These official projections yielded a slightly higher ultimate mean age and slightly lower standard deviation than those resulting from the model described in this paper.     

PSM技术及其小信号失真分析

介绍了一种短波单边带（ＳＳＢ）ＰＳＭ广播发射机中采用的新型高效、优质调制器——脉冲阶梯调制器（ＰＳＭ）,从理论上分析了ＰＳＭ的小信号失真,提出了ＰＤＭ补偿方法。并采用新型的通用可编程逻辑门阵列（ＧＡＬ）器件设计并制作了一套ＰＳＭ调制器系统。给出了实测方法和实测的失真度数据。实验结果表明,该设计方案是正确可行的