查询词典 second-class

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。

If absenting from work in series exceeds 3 days, the Second Party will regarded as disobeying the employment contract intentionally, the employer will be entitled to terminate the contract in advance and repatriate the Second Party to China, the Second Party should bear all losses.

如乙方有违法，违纪行为，应接受甲方按规定作出相应的处理和处罚，直至遣送回国；如乙方因违法受到阿联酋当地政府的处罚，乙方自己承担法律责任，并赔偿由此给甲方造成的经济损失。

In the meter-kilogram-second system, the unit of force required to accelerate a mass of one kilogram one meter per second per second, equal to100, 000 dynes.

牛顿米／千克／秒体系中每秒钟使一公斤的物体加速一米所需力的单位，等于十万达因

Since an Aimed Shot would fire (3-second cast time) and be followed by an autoshot as well as a global 1-second cooldown (3 cast plus 1 cool = 4 seconds total), the Multi-shot would be available to fire at the ten-second mark.

因为一个瞄准射击发出后（3秒施法时间）紧接着会有一发自动射击射出而所需的时间就像1秒的公共冷却（3＋1＝4秒），这之后也就是第10秒多重射击将可以再次使用。

Wherein said first yoke axle is coupled at a right angle to a hinge line of said first one of said controllable devices; wherein said second yoke axle is coupled at a right angle to a hinge line of said second one of said controllable devices; and wherein said hinge line of said first one of said controllable devices is skewed relative to said hinge line of said second one of said controllable devices.

其中，第一枷锁轴耦合在一个直角的铰链线表示，第一个表示可控装置；其中第二枷锁轴耦合在一个直角的铰链线第二之一说，可控装置；和其中说铰线说，第一个说，可控器件倾斜相对说铰线第二之一说，可控设备。

KOAs that have clinical symptoms were "primary symptoms even and second symptoms acute", and in treatment the primary symptoms and second symptoms shoud be relieved at the same time, the first important is to relieve the second symptoms, then take an eye on primary symptoms.

导师许书亮教授认为膝OA为&本虚标实&、&本痿标痹&之证，有症状的膝OA 仍&标急本缓&，治疗上应标本兼顾，以治标为主但始终兼顾其本。

Next comes second parameter's definition, because the second argument is single dimensional and zero-based array, this four bytes specifies the number of elements supplied to the array of the second parameter, this value is stored as an unsigned int32 in little-endian byte order.

接下来是第二个参数的定义，因为第二个参数是一维和零的数组，这4个字节指定提供给第二个参数数组元素的数量，此值是作为一个小符号int32储值endian字节顺序。

The above problems are studied in this thesis. First, the implicit NND scheme with mix flux splitting method proposed by Zhang Hanxin that is first order accurate in time and second order in space is modified. The modified scheme keeps the characteristics of fast convergence and is second order accurate both in time and space. It can be capable of simulating the unsteacly flow. Second, the topological method founded by Zhang Hanxin is improved to study the characteristics of vortex near the singular point on its axis and the cross streamlines on the longitudinal section passing the vortex axis. On the basis of topological results, a program which visualises numerical results is made out. It can help us analyse the characteristics of vortex motion.

本文对上述问题做了研究：第一，在数值模拟方面，借助于张涵信提出的NND算法和混合通量法，我们将他建立的时间为一阶、空间为二阶精度的快速隐式算法推广为时间和空间均为二阶精度的算法，这样做保留了原格式收敛快的特点，而且能适用于真实的非定常流态的计算；第二，将张涵信的拓扑分析方法加以推广，研究了涡轴附近及破裂点邻域内流场的空间特征，并以这些拓扑分析结果为指导，研制了一套显示计算结果的软件，这一软件能很好地帮助我们分析流场的计算结果和旋涡演变的特征。

To townhouses, the economic model sports villa villa villa to the main consumer markets in the second half of 1998 to the second half of 1999 to create a good marketing performance, a second wave of Shanghai villa market.

以排屋、联体别墅等经济型别墅为主体的别墅消费市场在1998年下半年至1999年下半年创造了良好的市场销售业绩，形成了上海别墅市场的第二次浪潮。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。