动量

The SMLMS Algorithm for the Multilayer Feedforward neural Network This part analyzes the misadjustment noise introduced by the momentum factor α for traditional error Back-Propagation algorithm, and demonstrates that it is a nonnegligible factor to effect the convergent precision of the neural network.

第三章通过分析传统BP算法中存在的动量误调噪声对整个网络的收敛精度所造成的影响，确认传统BP算法中的动量误调噪声对多层前向神经网络的学习确有不可忽略的消极作用。

In order to overcome the difficulty in estimating the ripple component on dc-side capacitor reference voltage, the modified control algorithm is proposed by ignoring the ripple component. Furthermore, the relation between control performance and damping coefficient is researched. In addition, the reasons of voltage source converter inner-loop control overmodulation are also analyzed. Based on the relation between control performance and VSC inner-loop input saturation, damping coefficient is adjusted on-line by fuzzy logic reasoning so that the trade-off between control accuracy and limitation of VSC inner-loop control overmodulation is solved preferably.

由于在线计算直流电容指令电压波动量十分困难，在控制方法的执行中忽略波动量的影响，简化了控制方法的实现；此外，该方法还研究了所注入的阻尼大小对控制效果的影响以及APF内层控制过调制产生的原因，针对无源性控制律跟踪精度的要求与内层控制过调制限幅条件间的矛盾，通过构造模糊逻辑推理环节实现阻尼系数的在线调整，在满足内层控制限幅条件下确保跟踪精度和补偿效果。

It suggests that the horizontal momentum of the meso-cyclone was brought down to the surface by heavy rain. At the right edge of meso-cyclone the momentum and RIF have the same direction, the two airflows overlay together and make the wind increase, so damage wind occurred.

分析认为，弓状回波后部存在较强后部下沉入流，由于强降水的拖曳作用，将中层中气旋的水平动量带到地面，中气旋右侧动量的方向与弓状回波后部的强下沉入流方向一致，两者叠加，使地面风速加大，造成灾害性大风。

A quasi one-dimensional, time dependent system model based on the parallel compressor theory was used to compute the effect of inlet distortion on turbine engine stability; Through Modifying steady state continuum equation, momentum equation and energy equation, the effect of power extraction and additional bleed on turbine engine running line was computed. Unsteady state continuum equation, momentum equation and energy equation were solved for computing the effect of acceleration on turbine engine running line.

其中，进气畸变对发动机气动稳定性影响的计算采用平行压气机模型，基于李亚普诺夫理论的方法完成；附加引气、功率提取对发动机气动稳定性的影响采用通过对发动机转子间质量、动量、能量守恒方程进行修正的方法进行；加速过程对发动机气动稳定性的影响采用欧拉方法求解动态的质量、动量、能量守恒方程的方法完成；最后采用&层迭&的方法进行各种降稳因素的综合评估。

In addition, the momentum dependence of the nuclear mean field potential has been shown for the first time to be important for isospin diffusion in HIC''s and a explicit expression for the density dependence of the symmetry energy has been obtained by fitting the experimental data.

同时在国际上首次研究了核平均场的动量相关性对重离子碰撞中同位旋弥散的影响，发现核平均场的动量相关性对同位旋弥散有重要的影响。

High transverse momentum partons which come from hard scattering will propagate in the strong interaction medium and interact with matter. These partons are expected to lose their energy in the medium by gluon bremsstrahlung, which is called Jet Quenching.In BNL/RHIC Runl (S_~(1/2)= 130GeV and Run2 (S_(NN~(1/2)= 200GeV, comparing the yield of leading particle in nucleus-nucleus collisions with nucleon-nucleon collision finds that charged and neutral pions are suppressed.

在相对论重离子碰撞中，末态高横动量强子产额的压低被认为是夸克胶子等粒子体已经生成的一个重要信号，在高能核-核碰撞过程中，硬散射发生在碰撞过程的初期，由硬散射过程形成的大横动量部分子将穿越强相互作用物质，这些硬部分子与热密物质发生强相互作用，经过韧致辐射而损失能量，我们把这种现象称为喷注淬火。

We pointed out again that the inclusion of the intrinsic transverse momentum distribution of partons leads to an enhancement of photon production cross section in the region of photon trans- verse momenta of a few GeV/c.

结果表明考虑部分子内禀横动量分布导致在光子横动量为几个GeV／c区域内光子产生截面的增加。

The effect of buoyancy is considered in the momentum equation of the CO transport model. The 3-D dust concentration field in the diversion tunnel with 50m long is simulated using the 3-D quasi-single phase models and a 3-D two phase flow model.

在粉尘扩散模型的动量源项中考虑了相间曳力、升力和虚拟质量力的作用，在CO运移模型的动量方程中考虑了浮力的影响。

The attitude control system is compared with a micro momentum-biased reaction wheel and three-axis magnetic-coil, to realize the followingfunctions:(1) after release from launcher, by B control law, this mode can damp the body rate down;(2) After that ADCS switches to the three-axis-stabilizing mode.

姿态控制子系统，以俯仰偏置动量轮组合三轴磁力矩器构成控制系统主体，实现初始入轨后的姿态角速率磁控阻尼，以及姿态的三轴稳定控制；分别对动量轮和三轴磁力矩器进行了参数设计。

Firstly,accordingto information entropy uncertainty relation of position and momentum,the definitionon squeezing in information entropy of position and momentum of the field is given.

首先，根据位置与动量的信息熵测不准关系，给出光场位置与动量的信息熵压缩定义。

It is also known as one of the most poisonous naturally occurring substances.

它也被称为一个最自然发生的有毒物质。

The greatest stress is found at the location on the cross section where V is the largest.

最大应力出现在横截面上V为最大的地方。