湿法处理铜合金屑工艺过程的物理化学探讨

本文着重讨论了化学—机械法处理普通黄铜屑,制备纯铜粉末工艺的关键部分—酸浸过程的物理化学问题,解释了"镀铜"现象.热力学分析指出,本工艺适合于处理各种铜合金尾料,尤其适合于黄铜类铜合金尾料.     

水库浸没影响的探讨

本文研究如何确定浸没影响范围,并给出防治措施。结合红山水库的专项研究,提出简易办法：建立分配比例系,利用短系列水文资料,推出“类比年流量”作为不同频率年三个进库站的流量。取７,８月份的月平均流量作为推算河道水面线的依据,应用计算机算得水面线外包线的水位,拟合精度超过了试算法和图解法。本办法确定的浸没范围接近实际,结合当地状况所提出的防治措施也是可行的。     

淹没水射流土层扩孔方程

运用水射流理论与土力学理论，建立了水射流土层扩孔方程．基于室内模拟实验，研究了射流参数与扩孔效果的关系，并验证了水射流土层扩孔方程的正确性．结果表明，增大射流流量比增大其压力对扩孔效果的提高更有效，实验参数βs主要与扩孔时钻杆的运动有关．     

Indexes of Indoor Thermal Environment with Asymmetrical Radiant Field

The main features of top-floor rooms with natural ventilation are identified by investigating indoor thermal environment in summer season. One is high indoor air temperature, for this reason the indoor climate is far beyond the thermal comfort standard; the other is the inhomogeneous temperature distribution of the inner wall surfaces, and high temperature of the inner surface of the roof causes much scorching to the head of occupant. This is the characteristic of such rooms.Both features mentioned above should be considered comprehensively for the evaluation of indoor thermal environment of the top-floor rooms with asymmetric radiantfield. In order to characterize the indoor thermalenvironment of the rooms, the heat stress index, HSI and radiant heat flux reaching human head, QR should beintroduced simultaneously as thermal indexes for the indoor climate evaluation. The application of the indexes to a top-floor room is vresented and analyzed.     

An Information Diffusion Technique for Fire Risk Analysis

IntroductionRiskreferstoadverseanduncertainoutcomes.Fireisdangeroustopeopleandproperty,anditoccursuncertainly.Ingeneral,fireriskismeasuredbytheprobabilityoffireoccurringandthemajortaskofriskanalysisistoestimatetheprobabilitydistributionaboutafirewithrespecttodifferentlevels.Theprobabilitydistributionmightofferabaseforriskmanagement,toreduceorcontrolfirerisk.Infireriskanalysis,therearetwooutstandingproblemsthatdeserveourattention.First,asystemwhereafiremayoccurisgenerallytoocomplextobecaptured…     

Study on the Environmental Quality Guarantee Ratio on the Basis of Total Air Pollutant Emission Amount Control

The hourly and daily air quality concentration in the total air pollutant emission amount control zone is not sure to be continuously up to national ambient air quality standard, even though the total annual air pollutant emission is permitted under the total air pollutant emission amount control (TAPEAC) on the basis of A-value method. So the concept of the environmental quality guarantee ratio (EQGR) for TAPEAC is advanced in this paper and its quantitative formula is figured out for both hourly and daily EQGR. It is concluded that the EQGR is related with the yearly arrangement of A-value besides the pollutant type. According to the meteorological data in a lower area along Yangtze River in 2000, the yearly A-value trend is analyzed. Based on the data, the hourly EQGR of SO2 and NO2 is respectively 97.4% and 90.2%, and daily EQGR respectively 90.2% and 79.5%.     

岩质边坡渗流场中等效连续介质模型的应用

在运用等效连续介质模型分析了裂隙岩体诊流场时，综合考虑并比较了单孔压水试验和节理裂隙统计取得的渗透系数，获得了能较好反映原位地质环境的修正渗透张量．将这种确定渗透张量的方法应用于某铁矿边坡工程渗流场分析中，取得了较好的结果．     

数据挖掘在岩质边坡稳定性预测中的应用

提出了一种预测岩土边坡稳定性的方法．利用数据挖掘的方法从边坡实例数据中挖掘出知识，在此基础上建立岩质边坡稳定性预测的智能模型系统．该系统可以根据获得的现场测试和监测资料，对边坡的稳定性进行较好的预测和估计．     

土质边坡抗滑桩机理分析

根据土体中抗滑桩的受力特性，利用Winkler模型和欧拉--伯努利理论，推导出了对抗滑桩的挠度表达式，并整理成“三次曲线”函数式．根据理论分析结合位于山东省泰安市境内的205国道高峪铺公铁立交桥边坡加固工程，利用计算机数值模拟技术，对稳定状态下抗滑桩整个桩体的轴向力和横向位移的变化情况进行了讨论，对桩体不同位置单元的抗滑力矩和承受的剪应力随时间的变化规律进行了模拟研究．     

复合锚杆桩在基础加固中的应用

根据某桥墩基础承载力下降的具体情况，采用单孔复合锚杆桩技术，对桥墩基础进行了加固，并对单孔复合锚杆桩的加固机理进行了初步研究．利用数值模拟方法，对加固后桥墩基础的承载能力以及加固结构的承载性能进行了比较系统地分析．结果表明：利用单孔复合锚杆桩技术加固后的桥墩基础，其承载力有较大幅度地提高，在600kN／m的桥墩载荷作用下，加固结构和周围的岩体在垂直方向上的位移变形值不足2mm，而且基本上保持着同步变形同步稳定的理想状态，达到了设计目的．