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     This paper discusses the technique, method and way of establishing CIS with micro—computer, introduces and implements the relation—topology data structure which is suited to graphical information management and the method which automatically update topological structure data when decomposing legal boundary of the parcel and editting cadastral elements.
     本文讨论了在微机上建立地籍信息系统的技术、方法和途径,提出了适合图形信息管理的关系型拓扑数据结构,以及分解宗地中权属界线图和编辑地籍图形时自动更新其拓扑结构数据的方法。
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     Possession Disposal in the course of Compensation to the Farmland Requisition
     农用补偿的物处置
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     laws of the place of destination apply to the property right for the movable property in transportation;
     运输的动产物 ,适用送达法 ;
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     The Right of Rescission in Contract Law
     论合同法的撤消
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     Cycles in Weighted Graphs
     赋的圈
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The results of estimation on heritability of the main characters in summer millet with variance analysis indicated that the highest rate of 89.9% was on the spikelet number, the next, 83.4%, on the culm length, a still lower rate, 47.3%, on the yield of individual plant and the lowest, 39.8%, on the spike weight of individual plants. The heritability of yield capacity of the plot was shown at a rate of 94.8%. According to study, the effect of applying the method of plot test with yield comparison to crop breeding...

The results of estimation on heritability of the main characters in summer millet with variance analysis indicated that the highest rate of 89.9% was on the spikelet number, the next, 83.4%, on the culm length, a still lower rate, 47.3%, on the yield of individual plant and the lowest, 39.8%, on the spike weight of individual plants. The heritability of yield capacity of the plot was shown at a rate of 94.8%. According to study, the effect of applying the method of plot test with yield comparison to crop breeding for the purpose of selecting high yield lines was known to be better than those of selecting individual plants.The study of the corelation of characters showed that in most cases, the corela-tion of inheritance was higher than those of phenotype both in positive or negative. The interference from circumstances may be excluded as the inheritance corelations of character were made for selecting main characters in crop breeding. Moreover, the main economic characters which show low heritability may be selected indirectly as the characters with higher heritability had been selected from them.The selection index was made on the basis of several individual characters as a compound standard of identification for certain complex characters. The weighting coefficients in the formular differed with different combinations of characters, and different selection effects were represented according to various selection index. So that, the selection index should be applied to the practice of crop breeding which showed more efficiency than direct selection for the purpose of increasing the selection efficiency.

夏谷性状的遗传力以码数为最高,株高和千粒重次之,以单株产量和株穗重最低,而小区产量的遗传力(集团群体的诸性状的综合表现)却更高。因此在选种上采用产量对比选拔高产优系要比选择高产单株的效果为好。遗传相关可以排除环境的干扰,做为选择的依据决定取舍较为可靠。可以从选择遗传力最高的性状入手,间接地选择出遗传力较低的主要经济性状。选择指数公式中的权数,因性状组合的不同而异,据此产生的选择效果也不同,应该选用比直接选择具有更高效率的选择指数,以判别选择对象的优劣。

It is proposed that the problem of optimum design of multi-functioned adjustable linkage mechanism be treated as one of multi-objective optimum design, by which the optimal mechanical parameters of Schloemann's flying shears are determined.A new evaluating function and a new method for determining the weighting coefficients are presented and prove to be superior to those developed by Kreironovski.

本文讨论了具有综合功能的可调连杆机构的优化设计,认为可将此种机构的优化设计处理成多目标的优化问题.并具体解决了施罗曼飞剪Ⅱ型——双自由度五杆机构参数的最佳确定问题.本文提出并使用了解决多目标优化问题的新的评价函数及确定评价函数中的权系数的新方法.在处理某些工程问题时,它较之苏联学者的方法有明显的优点.

When a diffusion scheme is used in the numerical solution of Saint-Ve- nant equations governing unsteady flow in open channels,the stability con- dition usually used is the Courant condition,i.e.|λ~±|(△t/△S)≤1.Based on the difference scheme of diffusion method,this stability condition is studied by the author.If |λ~±|(△t/△S)≤1-α,the scheme is stable,if(1-α)<|λ~±|(△t/△S)≤1, the scheme is unstable,The application of the weighted coefficiant α to physics is clearly explained,

用扩散法数值求解圣维南方程组时,国内外采用的商定性条件为 Courant 必要条件,即笔者直接从扩散法构造的差分格式出发,研究了稳定性问题,得出的结论表明:稳定性条件为,而区域为不稳定的。对于扩散法中的权因子α,本文作出了明确的物理解释。

 
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