汽车组装流水线作业工人慢性肌肉骨骼损伤调查研究

从调查３１６名汽车组装流水线作业工人的慢性肌肉损伤情况中发现，其主要不适有右手或右肩的疲劳、下背痛、手腕压痛、前臂压痛及下背压痛等。汽车组装流水作业工人的这些症状和体征与其工作时右上肢活动明显多于左上肢及常处于前倾弯腰体位有关     

A NOTE ON SPRING WARMING IN LAKE SUPERIOR1

ABSTRACT. Temperature recorder data from central Lake Superior obtained from May through July, 1967, are used to describe the spring warming of this deep lake. Data from the 30, 91 and 150 m levels suggest that water descending in the thermal bar spreads lakeward, filling the lake with an increasingly thick layer of maximum density water. Lakeward of the thermal bar, local warming is relatively slow preceeding and following the passage of the reverse thermocline at a given level.     

我国温泉旅游资源的开发与利用

我国温泉旅游资源丰富,目前已经形成了一批成熟的温泉旅游度假区,但是当前我国对温泉旅游资源的稀缺性和脆弱性认识不足,温泉旅游项目建设存在贵族化、劣势产品"搭便车"趋向、旅游功能单一等问题.提出充分重视温泉旅游资源的价值,根据市场状况合理选择开发模式,对本地洗浴客人和外来公务游客作重点营销,保持温泉旅游产品的价格优势,开发多元化旅游产品.     

玉米育苗移栽防御低温冷害和春旱试验研究

为防御玉米低温冷害和春旱,在吉林省东部开展了玉米育苗移栽田间试验。结果表明,玉米育苗移栽是一项简便有效的防灾、减灾实用技术。利用该项技术可增加220～250℃·d积温,因此可采用较当地大田播种生育期长10～15天、所需积温多230℃·d的偏晚熟品种,以避开播种出苗期干旱;产量和产值分别提高40%和35%左右,并可提早成熟,防霜害,提高玉米品质。     

一种新型的煤气回火安全装置

介绍了一种新型的煤气回火安全装置,说明了它的工作原理,主要参数,工艺结构等,叙述了其研制过程和应用情况。     

EflFect of long-term ozone fumigation on growth development and yield of spring wheat in open-top field chamber

The experimental plants were grown in open-top chamber and exposed to 0.26 ppm of ozone for six hrs. per day from seedling stage till ripening. The results showed that the height of plants, rates of earing, flowering, grain forming, ripening and the weight/1000 kernels all declined in fumigated plants in comparison with the controls. The yield lost 76.7%. The actual actions of ozone were that it caused foliar injury and chlorophyll destruction accelerating leaf senescence, reduction of assimilation products. O3 was unfavorable injurious to transport and accumulation of substances to the grains after flowering.     

A preliminary study on simplified simulation model of spring wheat growth

In the model developed in this paper, taking the characters and requirements of meteorological services into account, some conventional meteorological observations which are easy to be obtained have been ch.osen, and mathematical equations describing micro-growth processes of crops have been established on the basis of the field experiments, laboratorial analysis and computer's modelling tests with time interval of ten-days for several years (1987-1989), in accordance with the known biological and physical rules and corresponding reference literatures. It is a preliminary simplified simulation model of spring wheat growth in optimal water and nutrient conditions. The field experiments show that simulation results of this simplified model are satisfactory. The potential operational application and theoretical sense are significant in the meteorological forecast of yield and in the assessment of influences of climatic change on agriculture.     

电除尘器粉尘层反电晕击穿厚度理论与试验

为了合理地确定静电除尘器清灰振打周期,通过理论与试验方法确定静电除尘器粉尘层反电晕击穿厚度很有必要的。首先基于静电学理论导出带电粉尘层内的电量分布和电场分布数学模型,然后根据粉尘层反电晕发生条件,得出粉尘层反电晕击穿厚度的计算式,结果表明,反电晕击穿厚度是粉尘比电阻、电晕电流密度及极配的函数。通过对高比电阻不同厚度的粉尘层的反电晕击穿试验研究,结果表明,各击穿点的连线呈较连续光滑的弧线,提出了利用伏安特性曲线确定粉尘层反电晕击穿厚度的简易图解法。     

青岛即墨温泉沉积物特征及其对地热资源的标识意义

文章结合多种技术手段对青岛即墨温泉盆地第四纪沉积物进行研究。通过研究发现，在即墨温泉典型沉积物（矿泥）中，含有大量石膏、岩盐等与高矿化温泉地热水密切相关的自生矿物，以直隶小旋螺为代表的腹足类陆生软体动物化石和以土星介为代表的节肢动物介形虫化石在远离温泉喷口处大量分布，而在喷口附近缺失。根据胶东地区现有温泉与温泉沉积物的渊源关系，建立温泉沉积物对隐伏地热资源的标识性特征。     

EE型电除尘器在200MW机组上的应用

介绍了EE型电除尘器在安徽准北发电厂200MW发电机组配套锅炉上的应用情况以及处理高比电阻粉尘的方法。