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International tolerance grade: a series of tolerances that vary with basic size to provide a uniform levle of accuracy within a given grade.

公差符号:符号给出了公差与配合的技术要求,基本尺寸是一个数字,然后跟着表示基本偏差的字母和表示 IT 等级的数字。

The optimized exhaust lag angle and intake advance angle of the EQ6100 engine are calculated by means of alternated one dimension searching method vary with engine operating conditions.

采用轮流一维搜索法,计算出随EQ6 10 0发动机工况变化的优化的排气门延迟关闭角和进气门提前开启角。

The phosphorus forms and BAP vary with horizontal and vertical positions. The total phosphorus, inorganic phosphorus, BAY, and iron-phosphorus contents were high at a depth of 0~20 cm at the first sampling point, and then decreased at 20-40 cm of depth. This shows that the potential release capacity of P at 0-20 cm of depth is higher. The concentrations of total phosphorus and inorganic phosphorus decreased at 0~20 cm of depth and increased at 20~40 cm of depth at the second sampling point, but BAY and Fe-P increased along with the depth consistently. This shows that the deeper layer at the second sampling point had a higher potential release capacity of phosphorus.

不同地点沉积物各磷形态和BAP的垂向变化有较大的差异。1号采样点的总磷、无机磷、铁磷和BAP质量比在沉积0~20 cm处较高,20~40 cm逐渐减小,说明0~20 cm内释磷潜力较大;2号采样点的总磷和无机磷质量比先减小,20~40 cm逐渐增加,而BAP和铁磷质量比随深度增加呈上升趋势,说明2点深层具有较大的释磷潜力。

This problem is also important and valuable in Nonlinear Optics. It will be very helpful to understand how the aberrations affect the course of three- wave mixing, such as the change of conversion efficiency, the distribution of intensity and phase.Small signal solution of aberrated second harmonic generation is deduced from three-dimension three wave coupling functions. The numerical work gives out lot of results of different aberrations. The effects of the fundamental waves aberrations, which will change the conversion efficiency, distribution of intensity and phase in the frequency conversion, is analyzed. It shows that when walk-off and diffraction effects could be ignored approximately estimation of the phase distribution of second-harmonic wave could be done. The far field divergent angle and second moment radius of harmonic wave will vary with the aberration of fundamental wave, but the far field divergent angle will be obviously smaller than that of fundamental wave. The phase distribution of both fundamental and harmonic wave is measured using Hartmann-Shack wave front sensor in the experiment with 1064nm and 790nm lasers, respectively. Results are given.

首次从三维三波相互作用方程组推导得到了位相畸变光束倍频的小信号解;通过建立国防科学技术人学研究生院学位论文三维数值模型,编写相应仿真程序,首次得到了位相畸变光束倍频过程的大量计算结果,深入细致地研究了位相畸变光束经非线性光学频率变换后谐波的转换效率、光强分布、位相分布以及影响它们的各种因素;得出谐波的远场发散角和光斑二阶矩的变化规律会因为基波像差的不同而不同,但谐波的远场发散角明显地比相应基波的小的结论;得到了在走离效应和衍射效应等影响许多因素可以忽略的情况下,位相畸变传递到二次谐波的估算式;举例分析了KDP三倍频方案中,基波位相畸变对二次谐波和三次谐波的影响;实验工作中,用哈特曼一夏克传感器分别对IO64nm倍频过程和790飞秒超短脉冲倍频过程中的基波和谐波的位相分布进行了测量,给出了相应结果。

Small signal solution of aberrated second harmonic generation is deduced from three-dimension three wave coupling functions. The numerical work gives out lot of results of different aberrations. The effects of the fundamental wave's aberrations, which will change the conversion efficiency, distribution of intensity and phase in the frequency conversion, is analyzed. It shows that when walk-off and diffraction effects could be ignored approximately estimation of the phase distribution of second-harmonic wave could be done. The far field divergent angle and second moment radius of harmonic wave will vary with the aberration of fundamental wave, but the far field divergent angle will be obviously smaller than that of fundamental wave. The phase distribution of both fundamental and harmonic wave is measured using Hartmann-Shack wave front sensor in the experiment with 1064nm and 790nm lasers, respectively. Results are given.

首次从三维三波相互作用方程组推导得到了位相畸变光束倍频的小信号解;通过建立三维数值模型,编写相应仿真程序,首次得到了位相畸变光束倍频过程的大量计算结果,深入细致地研究了位相畸变光束经非线性光学频率变换后谐波的转换效率、光强分布、位相分布以及影响它们的各种因素;得出谐波的远场发散角和光斑二阶矩的变化规律会因为基波像差的不同而不同,但谐波的远场发散角明显地比相应基波的小的结论;得到了在走离效应和衍射效应等影响许多因素可以忽略的情况下,位相畸变传递到二次谐波的估算式;举例分析了KDP三倍频方案中,基波位相畸变对二次谐波和三次谐波的影响;实验工作中,用哈特曼-夏克传感器分别对1064nm倍频过程和790飞秒超短脉冲倍频过程中的基波和谐波的位相分布进行了测量,给出了相应结果。

By applying a revised version of the Cattell's 16 Personality Factor Questionnaire , the personality characteristics of Chi- nese canoeists have been studied and compared with those of athletes in various other sport events.Results of the study show that the personality characteristics of an athlete vary with the event he or she majors in.The findings about the special personality characteristics of the canoeists serve as scientific data for the identification of young talents and their training.

为了更广泛地了解我国各项目运动员的个性特点并进行比较研究,我们采用卡氏个性量表对我国划船运动员进行了测试研究,了解我国划船运动员16项个性因素的现状,同时与目前已经采用此测试量表所得的结果进行比较研究,希望能在短期内获得该运动项目个性特征的多方面的数据资料,尝试建立符合我国实情的划船运动员个性特征的模式,并为训练、选材提供有参考价值的心理测试工具和量表及科学依据。

The well-known empirical e-lgσ' relation is introduced into the study on one-dimensional nonlinear consolidation of one-layered soil under cyclic loadings. The corresponding consolidation equation is established with the assumptions that the decrease in permeability of soil is proportional to the decrease in compressibility during the consolidation process and that the distribution of initial effective pressure does not vary with depth.

将孔隙比e与有效应力σ'关系引入循环荷载作用下单层地基的一维非线性固结问题的研究之中,通过假定土体中的初始有效应力沿深度均匀分布和固结过程中上体渗透性的降低与压缩性的减小成正比,建立了低频循环荷载作用下单层地基的一维非线性固结问题的固结方程。

Therefore, our proposals will vary with the changing seasons, so alongside the typical dishes of Milan and Pavia will find dishes of nearby existing but all strictly "home made" as a time from the cakes, which are our pride, to continue with pickles, fresh pasta, pizza baked in wood oven and finally our wood-burning grill .

然而,如您所预订的酒店要求需要缴交押金,这些信息都会列明在&取消条款&条目内,而押金将会直接跟所选择的酒店进行结帐。如果您选择并预订的房间已标明是&预缴/不予发还(PREPAID/NOT REFUNDABLE)&的房型。

The results show that the local heat transfer characteristics vary with k,and the separation of the boundary layer shifts downstream with the increase of k.

结果表明,局部对流换热系数随长径比k变化,边界层的分离点随k的增大而向后移动。

I. e δ^13C and δ^18O ratioes obviously vary with height, generally, the heavier/lighter isotope ratio is higher at the upper/bottom layer of canopy; and temporally,δ^13C and δ^18O ratioes are highest from afternoon to sunset, and lower before dawn, with the lowest ratio at the time when air is stable and the CO2 from the respiration of vegetation and soil reaches the biggest accumulation amount.

主要表现在δ^13C和δ^18O在冠层内具有明显的垂直变化趋势,冠层上部重同位素含量较高,而底部含量较低。从时间变化看,δ^13C和δ^18O在午后到日落具有较高的水平,而凌晨,δ^13C和δ^18O较低。

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Means the parent directory, so this command means to execute "toolchain.sh," which is in the current directory.

代表父目录,所以这个命令就是执行当前目录下的"toolchain.sh"。

Yes,In fact,I'm on our city ream.

是的。事实上我是我们市队的。

The strong ionospheric disturbances caused by the significant magnetic storm appeared on the whole world.

用欧亚大陆地面电离层垂测站资料考察1989年3月12~16日磁暴期间的电离层暴形态及其发展变化。