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.     

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。     

新时代中国特色乡村振兴战略探究

乡村振兴战略是我国进入中国特色社会主义新时代的一项重大国家战略,是未来“三农”工作的核心和主线。乡村振兴战略是化解新时代主要矛盾、建设社会主义现代化强国、打破现代化进程中乡村衰落铁律、深化城乡发展规律、破解城乡二元格局的必然选择。我国的乡村振兴战略具有独特的内在机理,生态文明、四化协同发展、社会主义公有制、庞大的农村人口和独特的二元体制等基础,决定了乡村振兴战略的主要原则和核心路径。乡村振兴战略的主要原则是生态立本、文化传承、创新驱动、改革引领、系统思维,核心路径是实施城镇化协同推进战略、乡村土地改革和乡村治理改革战略以及乡村教育振兴、产业振兴和文化振兴战略六位一体。     

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.     

皖北地区家庭农场发展困境与对策研究 ——以宿州市为例

通过对皖北地区示范家庭农场进行深度调研和访谈,发现目前皖北地区家庭农场存在农业基础设施建设滞后、农场融资渠道不顺畅、农业保险制度不健全、农场经营服务体系落后等问题,认为应该加大农田水利建设、推进基本农田改造,推行农场信用评级、拓宽农场融资渠道,完善农业保险制度、创新农业保险产品,建设"三农"生产服务网点、健全农场经营服务体系.     

城乡教育统筹发展的研究现状、问题及展望

进入21世纪,城乡教育统筹发展成为我国教育领域内的热点议题。通过梳理发现,现有研究重点探讨了城乡教育统筹发展的内涵、理念、发展模式、管理体制、评价标准等问题,尽管观点不一,但都强调政府参与,都以缩小城乡教育差距和促进城乡教育可持续发展为目标,更加突出"以人为本"的理念,注意从地域和学校类别角度总结和提炼发展模式,并逐步趋向于建构量化的评价体系。现有研究还存在着研究方法相对单一、研究的深度和广度不够等问题。     

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