埋地管道弹性敷设竖向转角临界值的计算

对埋地油气管道弹性敷设计算公式中的竖向转角进行了分析，提出了在曲率半径一定的条件下，存在一个临界值，对该临界值进行了求解，得出了简化计算公式，由于该临界值在分别用于油、气管道时存在较大差异，为此对两部规范中的两种计算管道曲率半径的公式进行了比较，根据钢结构梁的挠性原理，推导出了适用于所有埋地钢质管道弹性敷设竖向转角临界值的简化计算公式，运用该简化计算公式可以方便快捷地进行埋地管道的设计计算，计算结果满足工程要求。     

两种养殖模式下紫贻贝生长转折期形态性状对体重的影响效应

基于2012年12月至2013年6月间共7个航次对嵊泗枸杞岛后头湾海域贝藻混养区、贝类单养区紫贻贝的相关生物学指标进行测定,采用相关分析、通径分析和偏回归分析等方法研究了8月龄紫贻贝（生长转折期）两个养殖区紫贻贝表型性状对体重的不同影响效应。研究结果表明：转折期影响两种养殖模式下紫贻贝体重的关键表型性状有差异性,其中影响单养区紫贻贝体重的表型性状为sw（壳宽）和BC（壳后端最远点到壳背面最高点的距离）,决定程度大小顺序呈SW〉BC。而影响贝藻混养区紫贻贝体重的表型性状为sw（壳宽）、oc（壳长）,决定程度大小顺序呈OC〉SW。     

The Research Based on the System of Turning Micro-robot

The robot techniques development is making over in an astonished velocity. Today ,all kinds of robots have different shape and function appear in everywhere. The robot that used the turning theory of human being and the motion theory of cankerworm is introduced. Micro-robot is an important offset of robot technique. This paper has solved three problems of this kind of micro-robot. One is the mechanical structure design, and the second is controlling circuit design, the third is measurement system design. Two new pattern micro-robots have been made which not only can move on the smooth armor plate, but also can turn its body quickly and freely. This new pattern micro-robot has strongly driving power, which also can be refitted another walking-type robot. At the same time, it also succeeded in controlling the robot through the microprocessor AT89C52 and the other new type controlling circuit. Taking the chip of LG9110 as the positive and negative driver, and the chip of SN75451B as the driver of the other parts, not only the design of circuits become easily, but also circuit board become simply. It provides some diagrams of program. In short, through the experiment, it gains some important data of making this kind of robot on the other hand, the experiment proves that the project not only can control the robot freely, but also offers a new idea for the studying of this kind of micro-robot.