砖混结构住宅现浇楼板裂缝分析与控制

本文分析了砖混结构住宅现浇板裂缝产生的原因及裂缝类型，并提出了相应的设计与施工方面的控制措施。     

浅谈对低温地板辐射采暖的几点认识

本重点介绍低温地板辐射采暖的发展、特点及施工中的注意事项。     

Engaging Undergraduate Kinesiology Students in Clinically-based Research

Many undergraduate students in kinesiology are interested in clinical careers and seek research opportunities for advanced study and unique learning experiences. This article describes a process of engaging undergraduate students in a multi-disciplinary, National Institutes of Health (NIH)-funded program project investigating factors that may affect pelvic floor support and symptoms in primiparous women during the first year postpartum. Students complete general and protocol-specific training prior to engagement, have specific tasks that reinforce skill development and require independence, and are invited to participate in additional opportunities with the investigative team. The topic of pelvic floor health is novel to most students and participation in this research expands their knowledge beyond a mainstream kinesiology curriculum. Institutionalizing this type of program could formalize undergraduate student research experiences and facilitate ongoing clinical research efforts with a kinesiology focus.     

道法自然与诗意地栖居--两种天人观的比较

西方人传统的思维方式是主客对立、感性与理性相分裂,从古希腊苏格拉底的"知识即美德"开始,思想家们就把人与自然对立起来,认为自由就在于征服自然,与此同时,人们也陷入了困境.而中国古代哲人的思维方式则是主客不分,感性理性混杂,他们提出的"天人合一"的思维方式,对解决因科学主义的泛滥而导致的人类困境,无疑提供了某些思想素材.故二者在天人观上的观点有较大的差异.     

极不稳定煤巷锚注支护技术的实践

为了解决煤矿极不稳定岩层煤巷的有效支护和返修率较高的技术难题，以某矿的工程实践为例，从巷道围岩破坏以及锚注支护的机理人手，根据具体生产条件特点，选择采用锚注联合支护形式，对其方案设计、主要支护技术参数、施工工艺以及支护监测等方面的内容进行了阐述，并提出了施工时应注意的事项；采用该法，在生产实践中取得了较为显著的技术经济效益，有力地促进了煤矿安全生产工作。     

对穿岩大巷受上部动压影响的研究

通过唐山矿业公司T1352工作面的开采，对其下部的南三石门8242大巷绕道进行了矿压观测．同时对所观测的数据做了科学的分析处理，从而得到巷道受采动影响时的变形规律，为类似条件下的开采提供了可靠的矿压数据。     

在岩石巷道掘进中的光面爆破技术

本文详细介绍了光面爆破的原理、光面爆破的方法、光面爆破参数的选择、光面爆破的标准和光面爆破的优点,说明了采用光面爆破的必要性。     

Macroscopic frost heave model based on segregation potential theory

A macroscopic frost heave model with more clear parameters was established. Based on a porosity rate frost heave model and segregation potential theory, a porosity rate function was deduced and introduced into the stress-strain relationship. Numerical simulation was conducted and verified by frost heave tests. Results show that the porosity rate within the frozen fringe is proportional to the square of temperature gradient and current porosity, and is also proportional to the exponential function of applied pressure. The relative errors between the calculated and measured results of frost depth and frost heave are within 3% and 15% respectively, demonstrating that the temperature gradient, applied pressure and current porosity are the main influencing factors, while temperature is just the constraint of frozen fringe. The improved model have meaningful and accessible parameters, which can be used in engineering with good accuracy.     

Location optimization for the tuned mass damper system on a long-span floor

The L4 roof of Beijing Olympic International Conference Center is a long-span floor with a tuned mass damper system. The locations of dampers in the layout are not optimal theoretically. This paper is about the location optimization of the 74 sets of dampers on the floor. The main content includes the establishment of a 2D dot-matrix model for the structure, the optimal location combination searched by a genetic algorithm, and the optimal results for five working conditions by calculating the total weight.     

火焰原子吸收法测定地板革中的铅

采用火焰原子吸收光谱法测定了地板革中的铅含量，在优化仪器实验条件的基础上，研究了溶液pH值和共存离子对吸光度的影响。结果表明，在pH=3的溶液中，铅在0～120μg／mL范围内具有良好的线性关系，相关系数(r)为0．9988，样品测定的相对标准偏差(RSD)在1．14％～2．52％之间，加标回收率99．23～104．90％，结果令人满意。