THE METHOD OF THE MEASUREMENT OF THE WORMWHEEL PROFILE ERROR WITH THE THREE-COORDINATE-MEASURE-MACHINE

In this paper we explain the method of the measurement of the wormwheel profile error with the three coordinate measuring machine. We first establish the wormwheel theoritical tooth profile equation according to the gear engage principle, then write the computing program and calculate the wormwheel theoritical profile, next analyse and calculate the error of the gage head interference. At last, we work out the measuring program and get the wormwheel profile measured with the three-coordinate measuring machine.     

THE STRAIN OF THE BARS IN THE STRUCTURAL COLUMNS OF THE PRESTRESSED EARTHQUAKE-RESISTANT BRICK-WALLS

Through the comparative tests of prestressed and non-prestressed brick-walls un-der the repeated lateral loading,the effect of the prestress-force to the strain distribution in the non-prestressed bars of the structural columns has been investigated.This effect is beneficial:the pre-stress-force will reduce the value of strain in the bars of the lower part in the columns and uniformize the strain distribution along the whole height of the columns.Furthermore,instead of a strainreduction,the strain of prestressed be will increase along with the increasing of the lateral load.Thus,the coefficient of prestress-force-increase could be calculated in the tWo stages of the crack-resistance and ultimate bearing capacity.As a result,both the prestressed and non-prestressed barsare able to give the potential of their bearing capacity a full play,and improve the earthquake-resis-tant property.     

宁夏平原湿地资源可持续利用研究

处我国干旱半干旱区的宁夏平原,拥有湿地面积122988hm2,且类型多样。根据宁夏平原湿地资源的特征,分析了宁夏平原湿地存在被侵占缩小、污染严重、利用型式单一、效率低下等问题。提出了合理规划,提高效益;保护生物多样性;利用氧化塘,处理污水;发展养殖、种植业;开发旅游等利于湿地资源可持续利用的措施.     

THE PROBLEMS AND THE COUNTERMEASURES ABOUT THE CURRENT REAL ESTATE

The problems of the current real estate are conscientiously analyzed.The maineight prublems of the current real eqtate are enumerated.In accordance with the problems.six coun-termeasures are advanced.     

THE CORRECTION TO THE DISTORTED IMAGE OF THE SCANNING TUNNELING MICROSCOPE

The reason of the STM image distortion is analyzed according to the principle of the Scanning Tunneling Microscope (STM). A physical and mathematical model is established and the numeral value solution is obtained by the computer. Finally,the STM distorted image is correctted with a satisfactory result.     

THE CHANGE LAW OF THE COAL''S STRUCTURE PARAMETER WITH INCREASING THE TEMPERATURE

In this paper,we have studied the change law of the structural parameter of coal in Nan Tong Coal Mine with the increasing the temperature. At the same time, we explore the cause of the changes with the electron microscope and of infrared spectrum.     

THE EFFECT OF THE CONVECT1VE HEAT TRANSFER IN THE ENTRANCE REGION OF THE TUBE ON THE HEAT TRANSFER IN THE TRBE -MOUTH REGION OF THE HIGH TEMPERATURE HEAT EXCHANGE EQUIPMENT

The effect of the convective heat transfer in the entrance region of the tube on the temperature field and the maximum temperature of the tube material in the tube -mouth region of the high temperature heat exchange equipment is examined by numerical analysis. The computations on the basis of four different formulas for convection heat transfer coefficient are performed. The computed results indicate that the efect can not be ignored as for heat protection of the tube -mouth region and it is resapnable and secure that the mean convective heat transfer coefficient with taking account of the effect of the entrance region is used in the thermal design of the tube -mouth region.     

破碎大米入仓过程分级问题理论研究

通过观察粮食在入仓过程中产生的物料自动分级现象,研究了自动分级在矩形筒仓储粮装粮过程中空气阻力带来的影响。根据牛顿第二定律对粮食下落运动时进行受力分析,建立物料入仓到装粮完毕在仓内的运动方程,并且根据物料下落过程中不同的受力情况推导出物料大米垂直落下与水平抛出时位移与时间关系方程。通过理论计算得出物料自由下落时间,随着物料粒径的增大而减小。根据分析,提出有效缓解物料自动分级的措施,减少损失。     

春谷幼穗发育阶段与叶龄指数关系的研究

经三年观察研究,十个不同熟性春谷品种的幼穗发育开始时间是随着它们生育日数长短而变化,并与拔节始期有着密切的关系.同时,春谷不同熟性品种的叶龄指数又与幼穗发育阶段呈回归直线关系.因此,春谷不同熟性品种利用其叶龄指数,求出适宜的系数,再代入改进的直线回归关系式,即可以较准确地判断出谷子的幼穗发育阶段.     

THE INDUSTRIAL ORGANIZATIONS AND THE L-S-BUSINESS STRATEGIES

This papar presents an evolution model in business behaviors-the L-S Business Strategies,gives some examples and predictions which support these strategies,and analyzes the relationship between the industrial organizations in China and the L-S Business strategies.     

晋南盆地小麦产量结构与产量水平关系的分析

本文利用农业资源动态监测体系,对晋南盆地小麦产量结构及其水平的关系进行了分析研究,找出了中、低产水平下成穗数、穗粒数、千粒重三者与产量的关系.三者的合理组成以及它们在形成产量时的相对贡献,对制定晋南盆地小麦栽培管理措施具有一定的参考作用.     

粮食产后服务中心信息化体系构建

粮食产后服务中心作为粮食产后服务体系的核心,急农所急,为农分忧,主动便农惠农,积极承担社会服务职能,积极推动了农村经济发展。但是目前,粮食产后服务中心尚没有建立完善的信息化体系,只有个别区域的粮食产后服务中心建立了"粮食银行"信息管理系统,用于管理农民代储、代加工、代售的粮食。基于这种情况,本文在分析粮食产后服务中心服务职能的基础之上,构建了完整的粮食产后服务中心信息化体系,为粮食产后服务中心的发展提供技术支撑。     

THE INTERMEDIATE SKY IS COMPOSED OF THE PSEUDO-CLEAR SKY AND THE PSEUDO-OVERCAST SKY

This paper suggests that the actual sky,with the exception of a few par-ticular weather conditions,such as rain and snowstorm in which artificial lighting is needed.The sky can bc divided into four types according to their sunlight conditions and sky luminance distrbutions,they arc clear sky,pscudc-clear sky,pseudo-overcast sky and overcast sky.It is inadequate to classify sky merely from cloudage and to affirm that all sky conditions except clear and overcast belong to only one type.From the viewpoint of statis-tical average over many years,when sun disk is covered with cloud,luminance distribution of the sky resembles that of overcast sky,and when there is no cloud over sun disk,it is sim-ilar to that of clear sky.The luminance distributions of pscudo-clear sky and pseudo-over-cast sky are quite.In pseudo-overcatssky,the maximum skydifferent.In pseudo-clear sky,it gets maximum sky luminence can not appear in the region around the sun in considera-tion of the problem from the viewpoint of statistial average over many years.Furthermore,the differences of horizont.al diffuse illuminancc between pseudo-clear and pseudl-ouercast sky are obvious.Therefore it is more suitable to study all kinds of skies,that is pseudo-clear and pseudo-overcast sky.     

挂面在储藏期间的品质变化

在实验室条件下进行了两种挂面的储藏实验.在储藏过程中分析了挂面的水分,脂肪酸值和烹煮特性的变化.实验结果表明,挂面的水分随空气中的湿度而变化,脂肪酸值随储藏时间而增加,增加到一定程度又开始下降.在挂面烹煮特性方面,挂面的吸水率在储藏期间开始呈增加的趋势,然后变化较平缓,最后开始下降.面汤中直链淀粉含量随储藏时间迅速减少.挂面的烹煮损失呈下降趋势.     

自生稻混入对稻米品质的影响

稻米的RVA粘度值和品尝评分值分别从稻米的物性指标和感官指标上标注了稻米的品质指标状态,粳稻中混入不同梯度的自生稻谷,稻米的RVA粘度值和品尝评分值的变化与自生稻混入的梯度呈现负相关性。     

THE ANISOTROPY DISCONTINUITY MODEL DUO TO THE STRIKE OF THE TAGGED DISCONTINUITIES

In this paper, on the base of the original shapes of discontinuities in engineering gedogy, we mainly discuss the ralations among the shape of discontinuity, the restraining effects of discontinuity deformations (including the normal deformation and the shear deformation ) and the crustal stress. Then we put forword the concept of the pseudo-dilatancy ungle which can indicate the motion direction, set up the anisotropic discontinuity model, and give some important results and formula for illustrating truly the discontinuities in rock engineering.     

菜豆抗锈育种的抗源筛选和抗病基因分析

通过对国内外引进的162个品种的田间自然发病调查和苗期接种鉴定,筛选出抗病型品种37个,中抗型21个,中感型60个,感病型44个.抗锈型品种中大多数是从国外引进且多属于矮生类型,其中少数矮生品种可直接用于生产,其余品种虽园艺性状不佳、但仍可作为蔓生菜豆育种的抗源亲本.抗病基因分析结果表明,抗锈性受一对基因控制且为显性.F_2代抗与感分离,经x~2测定完全符合3:1比例.本文对抗锈育种目标、苗期接种鉴定方法及用纯系小种作基因分析等进行了讨论.     

THE RESEARCH OF AERODYNAMIC PARAMETER ABOUT THE PIPE-CASING GUN OF THE EQUAL ACROSS-SECTION

The computation principle for the pipe-casing gun of the equal acress-section area is studied by applying the basic theory of compressible. The aerodynamic parameter of the pipecasing gun and the friction factor of rustless sted-pipes and copper-pipes of different diameters are measured. On the basis of this measurement, the outlet-velcity profile and the change of the rate and pressure on the axis are measured. The results show that the friction factor measured is reliable and the computation method is practical.