数控机床功能的扩展

本文主要分析了HEIDENHAIN TNC 310数控铣床系统中圆弧铣削指令及螺纹铣削指令,对螺纹铣削功能进行延伸,扩展到圆弧三轴联动,并对螺纹铣削指令格式进行了修改,从而具有圆弧三轴联动铣削功能。     

政府绩效评估指标体系中文文献评述:基于"3Es"的逻辑框架

从20世纪90年代以来,我国学者对政府绩效评估进行了很多的理论研究,但其中明确建立了指标体系的研究成果并不太多。本文基于"3Es"的逻辑框架,用政府服务的三个流程:投入、产出、结果为分析维度,从国内742篇相关文献中选择其中建立了绩效评估指标的42篇文章对指标进行了归类分解和评述。     

RuCl2[P(C6H5)3]2(NH2CH2CH2NH2)催化苯乙酮加氢反应的研究

优化了以RuCl2[P(C6H5)3]2(NH2CH2CH2NH2)作催化剂催化苯乙酮加氢制备α-苯乙醇的反应条件,考察了反应温度、反应压力、碱的用量及不同的碱对反应的影响,得出了一个较好的反应条件.     

The analysis of incomplete data using stochastic covariates

In the development of many diseases there are often associated random variables which continuously reflect the progress of a subject towards the final expression of the disease (failure). At any given time these processes, which we call stochastic covariates, may provide information about the current hazard and the remaining time to failure. Likewise, in situations when the specific times of key prior events are not known, such as the time of onset of an occult tumour or the time of infection with HIV-1, it may be possible to identify a stochastic covariate which reveals, indirectly, when the event of interest occurred. The analysis of carcinogenicity trials which involve occult tumours is usually based on the time of death or sacrifice and an indicator of tumour presence for each animal in the experiment. However, the size of an occult tumour observed at the endpoint represents data concerning tumour development which may convey additional information concerning both the tumour incidence rate and the rate of death to which tumour-bearing animals are subject. We develop a stochastic model for tumour growth and suggest different ways in which the effect of this growth on the hazard of failure might be modelled. Using a combined model for tumour growth and additive competing risks of death, we show that if this tumour size information is used, assumptions concerning tumour lethality, the context of observation or multiple sacrifice times are no longer necessary in order to estimate the tumour incidence rate. Parametric estimation based on the method of maximum likelihood is outlined and is applied to simulated data from the combined model. The results of this limited study confirm that use of the stochastic covariate tumour size results in more precise estimation of the incidence rate for occult tumours.     

论高校体育课程特色教材的构建

针对我国普通高校体育课程教材内容“千校一面”的实际，着眼于“学校教育要树立健康第一指导思想”观念的确立，以及学生对体育课程改革的期盼，构建适应新时代素质教育需要和符合高校自身专业特点与区域特色的体育教材。     

新硼试剂3—甲氧基—甲亚胺H与硼显色反应的研究

对新硼试剂3-甲氧基-甲亚胺H与硼显色反应体系研究结果表明,在pH=5的醋酸-醋酸铵缓冲体系中,硼与3-甲氧基-甲亚胺H在常温下形成2:3的黄绿色配合物,配合物稳定24h以上,λmax=410nm,ε550=6.82×104cm·mol-1·L-1,硼含量在0～2.5μg/25mL范围符合比耳定律.     

氮肥施用对冬小麦土壤残留NO3^——N含量及根系分布影响

通过6个氮水平试验，研究了不同氮肥用量对冬小麦土壤剖面NO3^--N含量及其与根系空间分布对应关系的影响；探索了土壤剖面NO3^--N含量与氮肥施用量的趋势规律，以及冬小麦施用氮肥对地下水造成污染的成因、规律及最危险时期。     

虚拟交易和消费文化——评德莱塞《欲望三部曲》的主题

中国学界对美国现代著名作家德莱塞的《美国悲剧》和《嘉莉妹妹》评介甚丰,但对他在长达半个世纪创作的、代表他一生创作思想和哲学思考转变的《欲望三部曲》———《金融家》、《巨人》和《禁欲者》却着墨不多。本文探讨三部曲中表现出来的消费主义主题,剖析作者在这个问题上的矛盾态度,指出他这种态度背后与主流意识形态间的协调和颠覆关系。     

北仑区政协提案工作的新做法

文章从加大提案工作宣传力度、加大领导力度、加大督办力度三方面总结了近年北仑区政协提案工作的新做法、新举措     

关于"体育社会问题"的辨析

体育社会学作为一门新兴的学科，已日趋成熟．其主要内容之一，是研究和解决体育社会问题，然而什么是体育社会问题，目前理论界尚无定论．该通过分析，指出了体育社会问题的两重属性：通性——危害社会秩序；特性——影响体育发展．同时尝试给出体育社会问题的定义，以供参考讨论．