A DISCUSSION ON THE EFFECT OF GROUND WATER IN CIVIL ENGINEERING

In this paper,the acting characteristics and effect of ground water on the stability of construction site and foundations in investigation,design,construction and service of buildings and structures are presented.The main problems of ground water are discussed.     

RATIONAL DETERMINATION OF TNE BEAM AND COLUMN CROSS-SECTIONAL SIZES OF THE FRAME STRUCTURE IN A EARTHQUAKE ZONE

At the preliminary design stage of a building, it is neccssary to determine thebeam and column cross-sectional sizes of frame strtictures.According to some provisions of the"Building Aseismatic Design Code"(GBJ 11-89),main factors having influence on the beam andcolumn cross-sectional sizes are analyzed.and calculating formulas for the determination of the beam and column cross-sectional sizes which are satisfied the restrained condition of horizontal dis-placement of a building are derived in this paper.     

THE OPTIMAL DESIGN AND ENGINEERING APPLICATION OF DISTRIBUTION

This paper introduces the metod of optimal design of municipal water distribution,The main points are the theory,mathematical model,program frame figure and example in practice of the optimal method of hydraulics.The program is applicable to the design and calculation of the pipe network in a city. It gives a simple and convenient calculation method for multiple-scheme design and scheme cmparison of water supply system.     

棉花产量结构模型的研究

经过1987和1988两年在河南安阳和江苏扬州二个点的田间试验研究,分别建立了棉花纤维产量构成因素公顷铃数、单铃重和衣分对产量影响的数学模型,以及播期、追施氮肥、密度、喷缩节安、去早蕾、留果枝数等栽培措施对产量构成各因素影响的数学模型。分析指出,产量构成因素的重要地位随地区不同而变化,主要栽培措施是依据一定地区和一定年份而言的。在安阳地区,铃重是影响产量最重要的因素,而去早蕾、密度和追施氮肥又是影响铃重的主要栽培措施,这三项措施的重要性顺序随着年份不同而不一样;在扬州地区,公顷铃数是贡献于产量的最重要因素,而密度又是影响公顷铃数的关键栽培措施,留果枝数和追施氮肥的地位则因年份不同而分别居第二、第三位。这为棉花生产因地因时制宜,抓主要矛盾提供了科学依据。     

A PRELIMARY STUDY FOR PLANNING OF EARTHQUAKE HAZARD PREVENTION FOR TOWNS AND CITIES IN MOUNTAIN REGION

Based on the contributing factors of earthqutake,its hazardregularity and the site investigation at Tongjing town in Chongqing,thispaper presents suggestions on the basis,principle and aim of earthquakeplanning in mountainous region,cities and towns as well as site selection,general layout of city,building arrangement,road width and quakeproofsafe area establishment,etc,     

引人注目的储粮害虫防治研究进展述评

作者根据所掌握的新近国际储粮害虫防治领域的科学研究与应用技术的动态和发展 ,结合我国情况 ,在熏蒸剂磷化氢和惰性粉类杀虫剂方面 ,择其主要的作了扼要介绍 ,并提出了看法和建议。     

MODEL TEST RESEARCH ON A COMPOSITE LINING OF UNDERGROUND ENGINEERING IN JOINTED ROCK

Combined with thedesign precept of Cai-Yuan highway tunnel 2 in Chongqing,stress state,time ffectiveness and rupture mechanism of rock near the bounda-ries of the tunnel and the second lining in jointed rock mass arc studied with model tests.The results show that shotcretc-bolt support betters mechanical properties of the periphey rock of the tunnel,and increases the capacity of anti-deformation.The second lining also has the action of supporting structure.     

APPLICATION OF AFUZZY DECISION IN TNE SELECTION OF ENGINEERING CONSTRUCTION SCHEME

Tnis paper analyses the construction scheme alternative of form systems of high-rise dwelling wall with fuzzy mathematics method,This idea,concentration method is put forward byBlin and it corresponds with engineering facts.     

粮堆通风阻力的研究方法及阻力模型研究进展

粮食储存过程中,干燥和通风是重要的单元操作。对粮堆进行强制通风,可以干燥或冷却粮堆,调节粮堆的温度和水分。探究气流通过粮堆的流动和压力分布规律、计算粮堆通风阻力是科学设计通风系统的关键之一。本文简要地介绍了国内外研究储粮通风流动和阻力的方法,重点综述了国内外通风阻力的理论、半理论和经验模型,分析了各种模型的优缺点,探讨了影响通风阻力的各种因素,可以为储粮通风阻力的研究、通风系统的设计和优化提供借鉴。     

储粮智能化通风控制数学模型

在<储粮机械通风技术规程>的基础上,结合储粮通风过程中粮温层次变化规律,对储粮通风过程的控制条件进行了修正,系统设计了储粮智能化通风控制数学模型,使储粮通风控制更加精确和合理,模型对人工控制的储粮通风操作也具有指导作用.     

APPLICATION OF FUZZY MATHEMATICS IN ARCHITECTURE PHYSICS

According to the definition of luminous flux, and on the basisof the probability of fuzzy stechastic events in fuzzy mathematies, this paperstudies the fuzzy phenomena of the luminous flux increment obtained by thereciprocal reflection of light on indoor surfaces. This paper also suggests a newway to compute the transmission of luminous flux.     

棉花高产优质高效益综合农艺措施数学模型的研究

本文采用旋转设计所作的三因素试验测得的参数,建立了子棉产量、皮棉产量、霜前花、纯收益等函数模型.通过计算机模拟,筛选出兼顾高产、优质、高效益的综合农艺措施为;每亩3.2—3.9千株,施纯氮11.3—12.6公斤,14.5—15.5个果枝打顶,并对试验因子的主效应及交互效应进行了剖析.     

气相色谱法鉴别橄榄油掺伪的研究

应用气相色谱法分析测定橄榄油的脂肪酸组成,揭示橄榄油脂肪酸特征,并研究其掺入菜籽油、花生油、大豆油或精炼橄榄油时脂肪酸的变化规律,为橄榄油的掺伪鉴别提供参考依据。     

Effects of the Adaptable Distribution for Lateral Forces Considering modes Coupling on Structural Pushover Analysis

Two high and flexible RC frame structures are analyzed;the paper explains the rise in the structural damping ratio and the base mode's drifting,and the modes coupling is caused by the greatly rising damping ratio.The paper also proposes that the modes coupling need be considered in the pushover analysis of the high and flexible RC frame structures.A CQC adaptive distribution for lateral forces in considering the modes coupling at every load step is given,and is compared with the traditional SRSS one.Meanwhile,some practical engineering suggestions are given.     

储粮害虫检测技术评述

储粮害虫的检测技术一直都是粮食储藏行业研究的热点,害虫种类的正确鉴别和密度的确定是粮食管理人员进行害虫防治的必要依据。因此,国内外很多学者在研究有效的害虫检测方案时,提出了许多储粮害虫检测方法。本文对目前国内外几种主要的害虫检测方法进行了简要的叙述与分析,并重点论述了基于图像识别的储粮害虫检测方法。     

FORMATION OF WEATHERED PRODUCT AND DESTROYING EFFECT OF AN ANCIENT GROTTO IN BEISHAN

An ancient grotto has been seriously weathered in Beishan,Dazu county.Sichuan province.This paper studies and discusses the hydrologic-geochemical reaction and weathered rock mass due to subsidence of acid rainwater and groundwater permeation.The researchingresults show that a main factor caused to destroy the shallow surface layer of rock is swelling of the sulphate crystal.     

A LOCATING DESIGN AND MANAGEMENT OF MODERN ENGINEERING AT A JOB SITE

This paper discusses methods of system design and sys-tem management of modern engineering at a job site on the generalplanning.They include system functions,system objects,system structure,system models,and the evaluational technique of planning system designand system management.     

A REVIEW AND ANALYSIS OF FAILURE CRITERIA FOR ASEISMIC STRUCTURES

This paper Extensively discusses the current failure criteria for aseismic structures and points out the drawback. A method how to thoroughly study the failure criteria is presented.     

STUDY ON YINCHUAN, A FAMOUS CITY WITH BEAUTIFUL SCENERY AND CHARACTERISTICS IN THE NORTH OF THE GREAT WALL

This paper presents the style and features of Yinchuan with a long history and culture,and analyses the relations between protection of the city and the modernization of the city.