Effect of the Silicic Acid Polymerization Degree on the Coagulating Property of Polyalumium Silicate Chloride

Polyaluminum silicate is a new type of inorganic macromolecular flocculants, which is developed as a complex product in recent years on the base of polyalumium flocculant and polysilicic acid flocculant. Sodium silicate is diluted to the concentration of 3.0% SiO 2 with distilled water. The solution was adjusted to pH 4.5 with sulphate acid and kept at quiescency for different time to get polysilicic acid with different polymerization degrees. Using polysilicic acid prepared and aluminium chloride as materials, a series of polyaluminium silicate chlorides(PASC) with different basicities(B), Al/Si molar ratios and polymerization degree of silicic acid are prepared by copolymerization technique. The Al-Ferron timed complex colorimetric method is applied to characterize species distribution of PASC and to study its influence factors. The interaction between hydrolyzed aluminum species and polysilicic acid with different polymerization degrees in PASC is discussed.The flocculant prepared is applied to the treatment of commercial concrete wastewater. The turbidity removal of commercial concrete wastewater is up to 97% when a PASC, prepared with polysilicic acid of 145 min polymerization degree.     

Study on Modeling for Pretreatment and Cyclic Control Stream

The characteristics of pretreatment and cyclic control stream are analysed:the form of cyclic embedded hardware circuit,the idea for designing the pretreatment program.The chart model of the system is established preliminarily.     

PROBABILISTIC EVALUATION FOR STEEL FRAME COLUMNS OF TALL BUILDINGS

Based on properties of parameters and test data of dom-estic steel,this paper analyses the reliability and partial coefficient forresistance of steel frame columns of tall builings.The result may serveas a scientific basis.It is not only for domestic steel instead of importedsteel in building tall steel structures,but also for compiling concerendstandards.     

Sociological Factors about the Urbanization of Traditional Community --Discussion on Ciqikou Community

The modernization has been the dream that Chinese nation has wished eagerly to realize all the time. In some sense, the modernization of China means urbanization. The reform and opening - up over the past 20 years , built and made the enormous achievement in urbanization of China, have changed the appearance of the city of China greatly. But to numerous traditional historical zones, what kind of urbanization way should on earth be taken, it has been the question long - term in dispute of the planning circles all the time. In this paper, Ciqikou community of Chongqing as an example, doing some discussions from sociology on this question, the author hopes, that for such difficult problem, by this settlement a piece of breach can be found as soon as possible.     

基于KPCA-WLSSVM的建筑能耗预测模型

为降低建筑能耗影响因素间复杂相关性对模型性能的影响,建立了一种基于KPCA-WLSSVM的建筑能耗预测模型。利用核主元分析(KPCA)对输入变量进行数据压缩,消除变量之间的相关性,简化模型结构;进一步采用加权最小二乘支持向量机(WLSSVM)方法建立建筑能耗预测模型,同时结合一种新型混沌粒子群-模拟退火混合优化(CPSO-SA)算法对模型参数进行优化,以提高模型的预测性能及泛化能力。通过将KPCA-WLSSVM模型方法应用于某办公建筑能耗的预测中,并与WLSSVM、LSSVM及RBFNN模型相比,实验结果表明,KPCA-WLSSVM模型方法能有效提高建筑能耗预测精度。     

Application of Water Quality Standand Leuel Method in Eualuazing Status Quo of Heauy-Metals Pollution in Riuers

The status quo of heauy-metals pollution in water phase of course of Long-Tan hydropower statian was eualuated by water Quality Standand Level Method. With this special method,mone objectiue and definite results were obtained.     

基于SOFM神经网络的核心种质取样算法

介绍了核心种质和自组织特征映射网络的基本概念，使用自组织特征映射网络的自组织特性对种质性状数据进行了聚类，利用聚类的分组结果，提取核心种质，通过对核心种质的各种参数的检验并与完全随机取样和一般的系统聚类的对比。结果表明，SOFM的取样算法，是一种比较有效快捷的算法，可以在实际中加以应用。     

棉花烂铃空间格局及抽样技术研究

本文通过聚集度指标（如：Ｃ、Ｋ、Ｃ＿Ａ、Ｉ、Ｉ＿δ、）测定，以及Ｉｗａｏ’线性回归、Ｔａｙｌｏｒ’ｓＳ￣２一回归和格局纹理分析，结果表明，棉花烂铃空间格而在一切密度下都呈聚集型，且聚集强度随烂铃密度的升高而增加，其空间格局的基本成分是疏松的个体群，其大小约为２～５株棉花，平均约含２．８４个烂铃个体，且个体群内的个体呈随机分布，经μ检验和方差分析，双对角线５点式、棋盘式和平行跳跃式等３种取样方法均适用于棉花烂铃田间调查，尤以双对角线５点式为佳，用双对角线５点式应样法调查的最适抽样数：一般病情普查至少１０个样方（每样方系５株棉花），系统测报和科研调查为２０～３０个样方。最后给出了棉花烂铃平均密度的零频率简易估计模型。     

早熟优质糯玉米杂交种西山糯的选育与特征特性

西山糯是贵州大学农学院玉米研究所以一个利用热带种质改良的温带 材料选育的优良自交系（南糯白）作母本，与一个带有独山白糯地方血缘和自交系（糯－1）作父本组配的糯玉米杂交种，根据品比、区试、生产试验和品质分析结果，该品种生育期早、抗逆性好、品质优良、丰产稳产、适应性广、制种产量较高，于2002年通过贵州省农作物品种审定委员会审定，予以推广。     

王家厂水库洪水实时预报方法及应用研究

考虑到流域降雨时空变化和流域地形、河道特征对流域产汇流的影响，应用新安江三水源产流模型、流域分散入流非线性汇流模型以及流域洪水实时预报校正模型，对王家厂流域洪水进行模拟，取得了较为满意的计算结果。