查询词典 reciprocal

The oil extraction rod is connects the pumping unit and the oil pump transmission device, Through reciprocal motion extraction petroleum.

抽油杆是连接抽油机和抽油泵的传动装置，通过往复运动抽取石油。

The stress intensity factors defined in terms of the integral are derived from the Betti's reciprocal work theorem and expressed in terms of relative quantities on a path and semi-weight function.

由功能互等定理导出用半权函数和积分围道裂纹尖端的参考场所表示的所研究情况的应力强度因子的表达式。

Calculations on the basis of the self-consistent approximation are used to study the effects of slit cracks, elliptical cracks and penny-shaped cracks. The influence of slit cracks on the elastic moduli under all kinds of loading conditions is discussed by Betti's reciprocal theorem and Irwin's relation describing the released energy rate of fracture to the stress intensity factors. The friction between the cracks' surfaces is taken into account for the closed cracks.

采用自恰方法研究了狭长型，椭圆型及硬币型裂纹在荷载作用下对弹性常数的影响；采用Betti的互易定理以及lrwin关于断裂能量释放率与应力强度因子的关系，分析了狭长型裂纹在各种应力状态下对弹性常数的影响；分析研究了裂纹闭合时，由于裂纹面上摩擦力的存在，闭合裂纹时弹性常数的影响。

When the constitutive relations of the two deformed bodies are all alike and linear elastic, the generalized reciprocal theorem of non-coupled system s just becomes Betti s.

推广Betti倒易定理的概念，建立了非耦联系统和耦联系统的广义倒易定理，它们适用于具有不同本构关系的两个变形体·当该两变形体的本构关系相同且为线弹性时，该非耦联系统的广义倒易定理即成为Betti倒易定理·同时，应用该两个广义倒易定理于弹性力学中的模拟计

The paper de-duced the kinematically admissible plastic strain rate cycles of scattered structuresproceeding from Betti′s reciprocal theorem and the principle of virtual work.A fi-nite element formula of upper shakedown analysis of shells is given.Computerprograms are coded to resolve the problems of lower shakedown limit andoptimum shakedown design of plate structures and the lower and uppershakedown limits of combined rotation shells with initial geometric imperfections.The computing results show the correctness and effectiveness of the methods pro-posed by this paper.

本文还从Betti互换定理和虚功原理出发推导出离散结构中可能的塑性应变率循环，将其应用于安定上限定理，首次给出了壳体安定上限分析的有限元列式；编制了板的安定下限分析和板的安定优化设计程序及有初始几何缺陷的组合旋转壳体安定上下限分析的样条有限元程序，计算结果表明本文提出的方法正确、可行。

In order to understand the molecular basis of heterosis, modified differential display of mRNA was used to characterize the difference in gene expression between cross-fertilized and self-fertilized kernels, reciprocal cross-fertilized kernels and their parents during the early stages of seed development by using 3 wheat hybrids with different level of heterosis.

本研究旨在利用mRNA差异显示技术探讨小麦杂交种子和自交种子以及正反杂交种子与其双亲在种子发育前期的基因表达差异，同时对杂种优势利用的模式作物玉米的杂交种子和自交种子的基因表达差异也进行了研究，并对典型的差异表达片段进行了克隆测序，为揭示杂种优势形成的分子机理积累了更多的资料，取得的主要结果如下

By using gene-family-specific primers, we found MADS-box, Ser/Thr protein kinase showed significantly differential expression patterns between reciprocal cross-fertilized kernels and their parents, indicating that MADS-box and ser/thr protein kinase may also play important roles in wheat heterosis.

利用家族特异性引物的展示结果表明，MADS-box家族基因在小麦杂交当代种子与亲本之间存在明显的基因表达差异，且强优势的杂交组合与弱优势组合之间表现差异的cDNA比例差异显著；Ser/Thr蛋白激酶的差异相对较小，表明MADS-box和Ser/Thr蛋白激酶与小麦杂种优势形成有重要关系。

Description: This project shall adopt the double-mixing-shaft reciprocal rotary distribution design, with the vibration excitation/isolation system to be floating-connected by double-seated spring and hydraulic system adopting highly-dynamic performance proportion, making unnecessary a separate motor for driving and ensuring high compactness of blocks. The machine should make less noise than similar products, operate quickly, reduce the impact upon change of direction and save energy. Each joint should be linked with knuckle bearing and provided with lubricating device to prevent wear and tear. The automatic control system should use PLC and HMI display of operation, providing accurate and explicit detection of faults.

内容说明：本项目采用双搅拌轴往复旋转布料设计，激振隔振系统采用双座双弹簧浮动连接，液压系统采用高动态性能比例，可使砌块成型机不需要单独电机驱动，能保证砌块密实度大；机台噪声比同类机台小，运行快速，降低变向时的冲击配备，节约能源；各关节部位均用关节轴承联结，具备润滑装置不易磨损；自控制系统选用PLC编制控制器，操作人机界面显示，故障准确明确。

Considering the characteristics that the effect of education for economic is unseen, lasting period and multi-sided and the fact of the multi-sided and reciprocal complication, it is a challenge that measuring the education contribution for economic system which is a complicated, large, fuzzy and unstable system.

该项目试图科学地衡量教育对经济的贡献以及将神经网络和模糊系统等先进数学工具引入到社会科学领域应用之中。

Bilateral space cooperation is implemented in various forms, from making reciprocal space programs and exchanges of scholars and specialists, and sponsoring symposiums, to jointly developing satellite or satellite parts, and providing satellite piggyback service and commercial launching service.

双边合作的形式多种多样，从制定互利的空间计划、互派专家学者、组织研讨会，到共同研制卫星或卫星部件、进行卫星搭载服务、提供商业发射服务等等。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。