金刚石钻进规程的实验室模拟及参数校核

金刚石钻进的钻进规程决定了钻进效率和钻头的使用寿命，也决定了钻进的安全性、可靠性和经济效益。因此，选择最佳的钻进规程尤其重要。本文通过智能微钻实验台对金刚石钻进的模拟钻进参数及其变化曲线、参数值，以及对应的钻进速度、进尺变化曲线、参数值进行分析，得到相应岩石条件下的最优钻进规程。     

Effects of temperature on population growth and intake of food by the army worm, Mythimna separata (Walker)

Population life tables of the army worm, Mythimna separata, were constructed and nutritional parameters of food for the larvae were examined at 5 temperatures from 16℃ to 32℃. The temperature suitable for growth and reproduction of the insect ranged from 20℃ to 28℃ with the optimum of 24℃. Their survivalship and fecundity were much poorer at 32℃ than at 16℃. Indices of population trend of the insect at these temperatures could well fitted with the parabolic curve which theoretically indicated that the population density would multiply by some 660 after one generation circle at the optimal temperature, 22.6℃, and it would decline at temperatures higher than 32.9℃ or lower than 12.3℃. Larval food intake and their AD tended to go up while their ECI and ECD to go down with a rise in temperature. These alterations in population size and feeding behavior caused by temperature would exert an important effect on their damage to crops.     

上海市TSP-Pb空气质量监测点位优化研究

通过对上海市23个站点的TSP-Pb监测数据的分析,发现TSP与Pb之间具有良好的相关性.因此考虑只用TSP数据对站点进行优化.通过对各站点TSP数据的聚类分析,将所有站点分为6类,然后对包含多个站点的类,将类中各站点与本类均值一同进行再聚类,选取代表站点.最终选取6个站点作为上海市TSP-Pb污染水平的代表站点.优化前后的对比分析表明,优化结果合理,信息损失量小.     

我国城市污水几种处理工艺简介

介绍了近年来城市污水处理工程中常见的几种处理工艺和主要设计参数。     

Performances of the cotton bollworm,Heliothis armigera (Hubner) at different temperatures and relative humidities

The cotton bollworm, Heliothis armigera (Hubner) is an important insect species at-tacking many crops. Their performances have been examined at temperatures from 15℃ to 35℃ and relative humidities (RH) between 22.5% and 100%, respectively, in order to assess possible effect of climate in future on its occurrence and infestation. Durations of all developmental stages of the insect shortened with increasing temperature. The temperature favoring population growth ranged from 25℃ to 30℃.Larval duration and adult longevity decreased as relative humidity increased, but development of other stages was independent of RH. At RH of over 64%, their survival rate, egg production and oviposition rate varied a little, and all the population parameters of the insect remained at a relative constant level.     

Fisher法在空气环境监测点位优化中的应用

将Fisher法应用于空气环境监测点位的优化。结果表明 ,该方法使用简便 ,避免了诸多人为因素 ,能反映优化布点后点位的整体代表性     

双室浮动床水处理工艺的完善与优化

研究分析双室浮动床水处理工艺和存在问题的原因,解决"起床"树脂乱层的问题,对再生工艺进行优化,提高了出水品质和周期制水量,降低了制水酸碱耗.     

长春地震台数字地震仪近震速报震级偏差研究

本次研究选用了长春地震台2000年至2004年近震速报资料,重新测算了数字地震仪近震震级,并以《吉林省地震目录》给出的震级为标准震级,进行了震级偏差统计分析。研究结果表明,随着震中距的变化长春地震台震级偏差变化较大,为使校正值精度提高,我们分段给出了长春台数字化地震仪水平向记录近震震级台站校正值。     

成品油管道站场安全仪表功能分析及改进措施

针对成品油管道输油站场安全仪表系统配置及逻辑设计的合理性进行了分析。选取输油管道站间远控阀室执行机构误动作这一常见事故,对安全仪表系统进行功能分析,优化安全仪表系统控制逻辑,对相关设备进行失效验证,找出可靠性低的设备,并对可靠性低的设备提出具体增加可靠性的措施,提高了安全仪表系统功能的有效性。     

聚丙烯环管反应器参数安全性分析

采用参数敏感性分析方法对聚丙烯装置环管反应器反应温度、转化率对初温的安全敏感性进行了研究。结果表明,反应初温在72~74℃的范围属于反应器的温度敏感区域,超过74℃则进入温度极敏感区域,可引起反应器堵塞、出料泵过载,严重时可造成非正常停车、甚至超压爆炸事故。