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It is shown that using this method one can design datameasuring systems which enable the equivalent circuit of investigated objects to be synthesized.


Problems of the metrological backup of datameasuring systems for inflight and bench testing of aviation techniques are presented.


The problems involved in synthesizing extremal datameasuring systems for the dynamic remote sensing of the Earth, taking into account signal fading are considered.


Optimization and Synthesis of Dynamic Remote Sensing Extremal DataMeasuring Systems


A method of increasing the accuracy of a datameasuring system for the quantitative recording of petroleum in vertical cylindric

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 The present study is a part of the studies to search for the concrete approaches of rice breeding for improvimg the efficiency of photosynthesis. In 19751977, net photosynthetic rate (Pn) of flag leaves of 329 varieties of rice were measured with infrared CO_2analyzer at full heading stage. The followings were clarified:1. The range of varietal differences of Pn was wide. The ratio of the maximum value to the minimum one was about 2 or more. Pn of variety Pearl Dwarf which was extensively cultivated in Kwang... The present study is a part of the studies to search for the concrete approaches of rice breeding for improvimg the efficiency of photosynthesis. In 19751977, net photosynthetic rate (Pn) of flag leaves of 329 varieties of rice were measured with infrared CO_2analyzer at full heading stage. The followings were clarified:1. The range of varietal differences of Pn was wide. The ratio of the maximum value to the minimum one was about 2 or more. Pn of variety Pearl Dwarf which was extensively cultivated in Kwang tung province was nearly equal to the average of all measured varieties.2. On the basis of calculation of data measured under the same conditions with 51 varieties, the variation coefficient of Pn of individuals within the same variety lies mainly in the range of 612% and that among varieties was 15.82%.3. By means of analysis of variance with experimental results obtained at three growth seasons in two years, it has been found that the difference of Pn among varieties of rice was significant at 1% level.4. By means of analysis of correlation with experimental results obtained at four growth seasons in two years, it was recognized that the ranking of Pn among varieties of rice was for the most part relatively stable.(writer: Tu Tsengping)  本研究为探索水稻高光效育种具体途径的一部分工作。1975～1977年间共测定了329个水稻品种剑叶的净光合率(Pn)。弄清了下述一些问题。1.水稻各品种间净光合率的差异是比较大的,最高值与最低值相比约有一倍的差异或更多些。广东推广种珍珠矮11号的净光合率基本上接近于各品种的平均值。2.对51个品种的测定结果分析,在同一测定条件下品种内各单株净光合率的变异系数主要集中在6～12％这个范围,而品种间的则为15.82％。3.据两年三造的测定材料对品种间的净光合率差异的显著性进行方差分析的结果,证明水稻各品种间净光合率的差异是极显著的。4.据两年四造的测定材料对品种间净光合率差异的相对稳定性进行相关分析的结果,可以认为水稻备品种净光合率的相对高低次序绝大多数品种是相对稳定的。  In this paper,we discuss the structure and stress analysis of the penstock wye with the internal crescent web reinforcement which has been studied and used as an important part of the hydrostation in our country since the year of 1974.As it is constructed of some cones and plates, which is a combined structure of plates and shells;there exists no any analytical method,as yet,to solve for its stresses.Thus,the finite element method is used and the results are obtained with the aid of the computer, which are compared,in... In this paper,we discuss the structure and stress analysis of the penstock wye with the internal crescent web reinforcement which has been studied and used as an important part of the hydrostation in our country since the year of 1974.As it is constructed of some cones and plates, which is a combined structure of plates and shells;there exists no any analytical method,as yet,to solve for its stresses.Thus,the finite element method is used and the results are obtained with the aid of the computer, which are compared,in this paper,with the data measured from the experiment of the penstock wye.  本文论述水电站重要部件之一——国内1974年起研究和使用的月牙形内加强肋压力叉管的结构和整体应力分析。它是由多个锥体和平板组成的复杂的板壳组合结构。迄今,还无法用解析法求得其整体应力分布规律。本文应用有限单元法,用电算求得了结果,並与试验实测数据作了比较。  This paper describes the timedomain electromagnetic response above the surface of a homogeneous earth for the application of the impulse type airborne electromagnetic method. The formulations of the response are developed from the those of the frequencedomain by the Fourier transform. Both the horizontal and the vertical component of the secondary field were computed with the parameters of the homemade impulse type airborne electromagnetic system. According to the computer results of the timedomain, the... This paper describes the timedomain electromagnetic response above the surface of a homogeneous earth for the application of the impulse type airborne electromagnetic method. The formulations of the response are developed from the those of the frequencedomain by the Fourier transform. Both the horizontal and the vertical component of the secondary field were computed with the parameters of the homemade impulse type airborne electromagnetic system. According to the computer results of the timedomain, the diagrames of interpretation are presented in this paper. It can be used to solve two major problems. The first is to interpret the timedomain airborne electromagnetic data measured at different flying altitude so that the earth resistivity will be provided. The second is to estimate the timedomain airborne E. M. response, if the earth resistivity is given; therefore the pseudoanomalies caused by the change of the flying altitude will be corrected.  为了脉冲式航空电磁法的应用,本文介绍了均匀大地上空的时间域电磁响应。用傅里叶变换由频率域公式导出了时间域的响应公式。然后以国产脉冲式航电系统的参数计算了二次场的水平分量和垂直分量。根据时间域的计算结果,本文给出了一些解释的图件,可以用来解决两个主要问题。其一是解释在不同飞行高度测得的时间域航空电磁法资料,从而提供大地电阻率;其二是如果给出了大地电阻率,则可计算时间域的航空电磁响应,因此可以校正由飞行高度改变引起的假异常。   << 更多相关文摘 
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