煤矿井下风门的连锁与报警

为了实现煤矿安全生产,各矿必须建立稳定的矿井通风系统,这里介绍一种可靠的井下通风设施—新型机械传动风门连锁装置,应用中取得了良好的效果。     

西安市外来人口公民参与现状分析与对策研究

以调查数据为依据,对西安市外来人口的公民参与状况进行了分析。分析表明:目前西安市外来人口的公民参与程度总体上不高,其中社会活动参与程度高于政治参与。外来人口的公民参与状况既与他们的自身特质有关,也与外来人口的组织化水平、对城市社会的认同程度,以及社会管理体制和政府公共政策等有关。因此,要提高外来人口的公民参与水平,既要注重外来人口公民参与意识和能力的培养,也要提供和完善外来人口公民参与的各种条件和制度。     

Investigation of a one-channel queueing system with an unlimited queue and the markovian anticipatory switching

Acondition of stability on the second approximation is obtained for a pulse system with anticipatory switching based on the diffusive approximation of normalized deviations of solutions of the system from the solution of an averaged system. The theoretical results obtained are used for investigating a one-channel queueing system with an unlimited queue. Translated from Kibernetika i Sistemnyi Analiz, No. 4, pp. 168–173, July–August, 2000.     

Selective Attention and the Perception of an Attended Nontarget Object.

Although many theories of attention assume that attending to an object results in the processing of all its feature dimensions, there has been no direct evidence that the irrelevant dimensions of an attended nontarget object are encoded. This article explores factors that modulate such processing. In 6 experiments, participants made a speeded response to a probe preceded by a prime that varied in 2 dimensions. Their reaction times to the probe were influenced by the response compatibility between the relevant and irrelevant dimensions of the prime. Furthermore, the effect was observed only when attention was directed to a nonlocation object feature and when participants' reaction times were relatively long. These results suggest that the effect of attention on a nontarget object is more complex than was previously understood. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

美国经常项目赤字持续性探讨与实证

本文首先在代际预算约束下推导出经常项目赤字可持续的充分条件。据此条件建立了含有单位根过程的两状态门限模型检验1947-2006年间美国经常项目赤字的持续性。实证结果表明美国经常项目赤字序列具有明显的非线性门限效应,结合两门限区制样本的分布特点,认为1947-1983年间美国经常项目赤字可持续,但自1983年尤其是1998年后美国经常项目赤字难以持续。     

浅谈施工企业应收账款的管理

管理和控制好应收账款,使施工企业尽量减少营运资金在应收账款上的呆滞和占用,从而提高施工企业的资金利用效率,减少施工企业经营风险,对施工企业的生存发展十分重要。结合我国施工企业的实际,本文全面研究了应收账款容易发生问题的环节,同时探讨了施工企业加强应收账款管理的现实意义及管理中存在的问题,并从事前、事中、事后三个环节进行全过程控制,并提出了强化企业应收账款管理的主要控制手段。     

Nanotechnology—The basis for the creation of new high-reliability elements

One possible method of increasing the reliability of electronic elements in the future is considered. The method is based on the use of three-dimensional back-up. The construction of such electronic elements can be achieved on the basis of nanotechnologies.     

国外电子气体技术进展

论述了集成电路技术的发展对电子气体质量提出的更为刻苛的要求。介绍了一些相关新设备、新仪器以及新品种电子气体的应用。     

厦门地区高校人群与湿地互动行为研究——以华侨大学厦门校区为例

以华侨大学厦门校区为例,通过引入环境行为学的相关理论,并运用POE法对环境及其周边人群进行分析和研究,探寻一种可控性强,充分体现行为活动与校园湿地兼容共存的设计手法。使设计者可以不断地从"人-生态环境"相互作用的大系统中吸收新的信息,使设计程序更为合理化、科学化。为将来厦门地区高校湿地生态系统的保护以及校园规划和建设提供依据和保证。     

建设工程预决算审核问题及建议

在界定建设工程预决算审核的概念及内容的基础上,从审核依据的完整和效力、审核的关键步骤等方面分析工程预决算审核中应注意的问题,并提出相应建议。最后提出建立激励机制,对审核进行有效管理和加强工程造价管理的建议。