软岩嵌岩桩嵌岩段的侧阻力研究

软岩嵌岩桩作为一种基础形式，目前国内研究较少。文章探讨了国内外对本课题的一些研究，分析了侧阻力的激发机理，详尽地阐述了嵌岩段侧阻力的影响因素，并且讨论了侧阻力的计算公式，分析表明岩石的强度、桩岩界面的粗糙情况、岩石的模量、岩石的初始应力等都对侧阻力有影响。研究表明，嵌岩段侧阻力受桩表面的法向刚度所控制，嵌岩段的单位极限侧阻力受嵌岩比的影响不大，规范上的公式不完全适合软岩嵌岩桩。     

The Global Warming Debate: A Review of the State of Science

A review of the present status of the global warming science is presented in this paper. The term global warming is now popularly used to refer to the recent reported increase in the mean surface temperature of the earth; this increase being attributed to increasing human activity and in particular to the increased concentration of greenhouse gases (carbon dioxide, methane and nitrous oxide) in the atmosphere. Since the mid to late 1980s there has been an intense and often emotional debate on this topic. The various climate change reports (1996, 2001) prepared by the IPCC (Intergovernmental Panel on Climate Change), have provided the scientific framework that ultimately led to the Kyoto protocol on the reduction of greenhouse gas emissions (particularly carbon dioxide) due to the burning of fossil fuels. Numerous peer-reviewed studies reported in recent literature have attempted to verify several of the projections on climate change that have been detailed by the IPCC reports.The global warming debate as presented by the media usually focuses on the increasing mean temperature of the earth, associated extreme weather events and future climate projections of increasing frequency of extreme weather events worldwide. In reality, the climate change issue is considerably more complex than an increase in the earth’s mean temperature and in extreme weather events. Several recent studies have questioned many of the projections of climate change made by the IPCC reports and at present there is an emerging dissenting view of the global warming science which is at odds with the IPCC view of the cause and consequence of global warming. Our review suggests that the dissenting view offered by the skeptics or opponents of global warming appears substantially more credible than the supporting view put forth by the proponents of global warming. Further, the projections of future climate change over the next fifty to one hundred years is based on insufficiently verified climate models and are therefore not considered reliable at this point in time.     

煤矸石填充煤矿采空区的环境影响试验研究

在对平顶山煤矿集团十二矿采用矸石填充矿井采空区进行深人调整研究的基础上，以十二矿煤矸石为试验对象，进行了浸泡实验，测定浸出液的pH值、F^-浓度以及cd、cr^6 、Zn、Mn、Pb、Cu的含量等对地下水有影响的几个指标，再加以综合分析研究。试验结果表明：所测指标基本符合国家标准，对地下水环境的影响因子主要是pH值和F^-。     

PLS法在重庆巫山县邓家屋场滑坡稳定性影响因素分析中的应用

滑坡各影响因素之间存在较强的相关性。偏最小二乘回归(PLS)方法在一个算法下同时实现了回归建模(多元线性回归分析)、数据结构简化(主成分分析)以及两组变量间的相关分析(典型相关分析),给因变量之间存在较高相关性的回归带来极大的便利。为了探讨PLS方法在滑坡稳定性影响因素分析中的适用性,选取位于三峡水库区巫山县的邓家屋场滑坡为试验区。在考虑三峡水库蓄水后引起的地下水力坡度变化、地震因素以及建筑物因素对邓家屋场滑坡稳定性的影响条件下,建立了滑坡稳定性系数与以上指标的PLS回归方程,以期达到对邓家屋场滑坡稳定性影响因素敏感性的分析目标。计算建立的回归模型为:K*=0.181468×C*+0.274876×φ*-0.611369×J*-0.238604×α*-0.105219×ΔW*。表达式各因素影响力的排序为:地下水力坡度>滑动面内摩擦角>地震加速度>滑动面内聚力>滑体均匀加载。结果表明,采用偏最小二乘回归方法对滑坡稳定性影响因素进行分析具有物理意义明确、计算简单、建模效果好、解释性强的特点,是一种可行的解决方案。     

热带气旋海面最大风速半径的计算

利用含有摩擦的平面极坐标水平运动方程组, 引入藤田气压模式, 在热带气旋域内最大风速为已知的条件下, 经过合理的简化和推导, 得到了呈稳定状态的海面移动非对称热带气旋的最大风速半径的计算方案。分析结果表明, 当最大风速越小、中心气压越低、环境温度和气压越高、纬度越低或摩擦系数越小时, 热带气旋的最大风速半径就越大;反之, 最大风速半径就越小。最大风速和它半径上的最小风向内偏角出现在热带气旋移向的右后侧。对9109号和9115号热带气旋的计算表明, 最大风速半径在发展初期增加, 在发展后期减小, 而在衰减期迅速增加。     

温度对棉花产量结构及发育速度的可能影响

该文利用新疆农业气象观测资料，在构建棉花品种熟性指数的基础上，建立了温度对不同品种棉花产量结构及发育速度影响的模式，进一步分析了温度变化对不同品种棉花单株铃数、单铃重、霜前花比例及发育速度的可能影响。该文对棉花生产气象监测、预测及评价工作有重要参考价值。     

磁偏角磁变仪的定向

分析了影响磁偏角磁变仪定向质量的原因，指出应重视阻尼器影响，提出磁偏角磁变仪以在实际工作环境中定向最佳，用扭头带动镜面法定向实用性强，无须做任何改正。     

Planetary Boundary Layer over a Small Island as Observed by a Doppler Sodar

Observations from a new five-beam phasedarray Doppler sodar located over a small islandrevealed the development of an internal boundary layer (IBL)from the edge of a cliff in strong windcases, and the presence of systematic convective motions in unstableconditions. The top of the IBL ischaracterized by a small wind maximum trailing fromthe strong wind area at the edge of the cliff, anddevelops with distance from the edge. In the presence ofcumulus clouds, an upwardvelocity region, surrounded by downward motion, wasobserved in the subcloud layer. Anupward convective pattern of organized motion following the passage of cumulus clouds may be young thermalsrising from a height of about 100 m.     

坑道无线电透视的影响因素

介绍了无线电波坑道透技术的方法原理；对煤矿上影响坑道透视效果的因素进行了分析，并提出了解决方法。     

Estimation of source parameters of Chamoli Earthquake, India

The devastating earthquake (mb = 6.6) at Chamoli, Garhwal Himalaya, which occurred in the morning hours on 29th March 1999, was recorded on Delhi Strong Motion Accelerograph (DSMA) Network operated by the Central Building Research Institute, Roorkee. In this paper the source parameters of this event calculated from the Strong Motion Data are presented. The seismic moment for this event has been found to be of the order of 10²⁵ dyne.cm and the moment magnitude has been calculated in the range of 6.53–6.69 at different stations. The stress drop and source radius for the earthquake are also calculated.