高校教务管理信息化的研究与设计

本文从高校教务管理信息化的重要性和现状出发,介绍了当前高校管理信息化所出现的问题,主要包括规划不当、运行不完整、人员变动大、工作人员能力低、人才缺乏等。针对以上问题,提出了几点有效的建议,主要包括：合理规划系统软件设计、保证基本信息的准确性和人才的培养等。本文提出的建议可以作为高校建设教务信息化管理系统的参考。     

无穷大开簇上构型出现次数的强大数律和中心极限定理(英文)

考虑定义在整点格网Ld上的参数为p的上临界Bernoulli渗流,研究无穷大开簇上构型的发生情况.用Λn表示一个给定的构型P在限制于框B(n)=[-n,n]d中的无穷大开簇上发生的次数,得到了关于Λn的强大数律和中心极限定理.     

Study on arsenic level in public water supply of Delhi using hydride generator accessory coupled with atomic absorption spectrophotometer

Exposure to arsenic has been associated with several health hazards. Worldwide the main reason for chronic human intoxication with arsenic is intake of contaminated drinking water. Air acetylene type of atomic absorption spectrophotometer in combination with hydride generator accessory was used to analyze arsenic level in 25 water samples collected from 25 booster pumping stations and 313 water samples collected from tap water supply of 62 areas of Delhi. Results were analyzed using SPSS and Barlett’s Chi Square Test. Mean arsenic level detected in water samples collected from booster pumping stations was 0.00976 ppm (Range 0.000–0.017 ppm, Standard Deviation 0.006 and Standard error of Mean 0.00118). Maximum arsenic level (0.017 ppm) was found in water samples of booster pumping stations of Mehrauli, Punjabi Bagh and Ramjas Road. Mean arsenic level detected in samples collected from tap water supply was 0.013 ppm (Range 0–0.0430 ppm, Standard Deviation 0.00911 and Standard error of Mean 0.000515). In water samples of 42 areas arsenic level detected was exceeding WHO/EPA permissible limit of 0.01 ppm (10 ppb). The mean arsenic level detected in water samples of booster pumping station was within WHO/EPA permissible limit while mean arsenic level detected in tap water samples was marginally higher. Mixing of ground water and contamination through broken or leaking channel could be the possible reason of higher arsenic level in tap water. Continuous monitoring of quality of drinking water is required particularly in view of water contamination caused by industrial waste and uncontrolled ground water extraction.     

一类生物捕食系统的定性分析

对一类两种群均有收获率的具HollingIII类功能反应的食饵-捕食系统作了定性分析,利用常微分方程定性,稳定性及分支理论,得到此类生物捕食系统平衡点的性态和极限环的存在、不存在的条件,补充和完善了前人的结果.     

对我国堕胎入刑问题的研究

我国在堕胎领域乱象丛生,我国立法在这方面又没有规制,参看有些国家和地区的立法情况,对处理我国目前堕胎领域的问题极有借鉴意义。     

浅谈超限运输对公路桥梁的破坏

本文分析了超限和超载运输对各种桥梁结构及桥面系的破坏机理及病害状况,并针对保定市的公路桥梁探讨了解决对策及桥梁养护中应注意的问题。     

极限在高中物理教学中应用示例

培养学生应用数学知识解决物理问题的能力,在于教师平时的教学引导.这里例举应用极限知识解决物理问题的做法,是课任教师的尝试之一.     

以频率估计概率的误差估计及其应用

阐述了以频率估计概率的误差估计公式，并举例说明公式在实际问题中的有关应用。     

利用无穷小量替换法求极限时应注意的问题

在某些(0/0)型不定式极限中,若能正确运用无穷小量替换法,将使问题简单化。但若忽略某些细节,则将导致出现错误,故应正确使用无穷小量替换法。     

历史发生原理在高职极限概念教学中的应用

本文从历史发生原理及高职极限概念教学现状出发．叙述了高职极限概念教学中应用历史发生原理的必要性。从数学名题为引融入极限概念教学和追溯极限的发展历史．构建正确的极限概念两个方面提出极限概念教学实施对策．从而优化高职极限概念的教学设计。