衰减

Resultantly, the individual warm/cold events in ENSO cycle appear to be partially locked to the annual cycle, and also exhibit obvious irregularity both in amplitude and in lasting time.

本文第四章研制设计了一包含海洋表面边界层和大气辐合反馈过程的热带太平洋海气耦合异常模式，进而利用该模式对ENSO循环进行了较为真实的模拟，通过对模式ENSO循环的演变特征及其形成机制的细致分析，建立了-ENSO循环的非线性分析模式，并提出了ENSO循环形成的一种更为客观的理论，指出：1）和观测事实类似，模式ENSO循环确实涉及了三种主要时间尺度过程即LF、QB和AC，其中LF为3-4年主周期振荡，QB占总方差10～20%；2）ENSO循环的正反馈机制是不稳定海气相互作用过程，且这一不稳定过程的发展在暖态中明显强于冷态；3）ENSO循环的负反馈机制在冷暖态中表现不同，在冷态消亡过程中，这种负反馈过程主要表现为西边界反射产生的时滞效应，但在暖态消亡过程中不存在类似的时滞效应，其负反馈过程主要表现为在海气耦合不稳定充分发展时伴随的赤道两侧冷水上翻过程的加强以及非线性过程的衰减作用抑制了不稳定的发展并最终使得系统回复至冷态；4）ENSO循环的3-4年主周期振荡是一非线性系统的自激振荡现象，其形成是线性系统的本征模即准两年振荡通过非线性机制产生的周期加倍所致，其中&单向性&大气辐合反馈加热过程对其形成至关重要；5）虽然年循环过程对ENSO循环形成没有本质影响，但它可明显影响ENSO循环的具体振幅和位相，使得ENSO对季节循环有明显的&锁相&特征，并且也使得ENSO循环在振幅大小和时间长短方面呈现出明显的不规则性。

A co-simulation is investigated combined with control model in MATLAB/Simulink and mechanical model in ADAMS. The simulation results prove that when steering a large angle on slippery roads, yaw compensation can improve the stability of automobiles; when steering at a low speed, return compensation can improve the lack of returnability caused by friction loss torque; and when steering at a high speed, damping compensation can reduce the oscillation of steering wheel, improve the maneuverability and stability and also avoid overshoot.

仿真结果证明，在潮湿光滑路面上行驶过程中，进行大角度快速转向，在助力中加入横摆补偿可以提高汽车的稳定性；在汽车低速行驶转向回正时，施加回正补偿可以改善汽车因摩擦转矩而导致的回正不足；在汽车高速行驶时施加阻尼控制，可以衰减方向盘抖动现象，提高操纵稳定性，防止打手现象发生。

The equilibrium value of D〓 fundamentally and reversibly changes with respect to the annealing and quenching above the Curie temperature.

磁导率衰减平衡值对高于Curie温度的循环退火和淬火是可逆变化的。

Ricker wavelet: A particular seismic waveform which results from the transmission of a seismic impulse through an ideal viscoelastic material with attenuation proportional to the square of the frequency.

雷克子波：一种特殊的地震波形，它是由一地震波脉冲通过一理想粘弹性介质按频率的二次方衰减后得到的。

The issues of present seismic wavelet frequency caused by different concepts, such as apparent frequency, dominant frequency, peak frequency and centroid frequency, etc., which are defined by different methods, and understanding deviation, definition of seismic wavelet frequency for time and frequency domain are concluded and summarized. On this basis, three kinds of seismic wavelets in common use such as Ricker and Zinc wavelets as well as sine wavelet with exponential attenuation characteristics are analyzed and a conclude is achieved that apparent frequency and dominant frequency are consistent in essence, but peak frequency and centroid frequency as well as apparent frequency or dominant frequency are not completely consistent with different seismic wavelets. For actual seismic data, peak frequency can approximately be used as dominant frequency, but it is not suitable when seismic wavelet is known for it can give out any wrong knowledge and results.

针对目前地震子波频率由于定义方式出现的各种概念（视频率、主频、峰值频率、中心频率等）以及理解上出现的偏差等问题，首先从时间域定义和频率域定义2个方面进行了归纳和总结，并在此基础上对3种常用地震子波（Ricker子波，Zinc子波，正弦指数衰减子波）进行了分析和研究，得出视频率与主频概念一致，但不同地震子波的峰值频率、中心频率和视频率之间并不完全一致的结论；而对于实际地震资料，将峰值频率近似看作地震子波的主频是可以的，但在地震子波已知的情形下这样做是不恰当的，甚至可能会得出错误的结论和认识。

During the processes of uniaxial compressive failure of rocklike materials, the weakness of local material stiffness was considered to result from the distribution density decrease of bond, which was induced by the local deformation in the micro scale.

岩石类材料在受压破坏过程中，宏观上局部刚度的降低是在微观尺度上虚拟键分布密度衰减的结果。

This paper simply says the operation、 principle and designing schema of Analogue System Of Moving Target; Emphatically discuss the design schema of Light Attenuator of imitating energy and Closed servo-control of realizing the mirror reflector to turn to move in space, and make the sciential analysis about the definition of the main function parameter value.

论文阐述了动目标模拟系统的工作、原理及设计方案；着重讨论了用于模拟目标能量的光衰减器和实现平面反射镜二维转动的闭环伺服系统的设计方案，并对其主要性能参数的确定做了技术探讨。

Methods We test the cataract eyes pre-operatively apply with the scotopic blue and white flash(the intensity of which is 2.5logunit lower than that of the standard's)electroretinogram respectively,and analysis the relationship between the corrected visual acuity peripheral retinal(about 10 degree outside the macular fovea) condition 3 months post-operatively and the b wave amplitude of two kinds of F-ERG.

术前采用暗适应蓝、白光(比标准闪光衰减 2 。5 log单位的低强度光)视网膜电流图分别检查拟行白内障手术眼，将术后 3月最佳矫正视力、周边(黄斑中心凹 10°以外)视网膜状况与术前两种 F- ERG b波振幅分别作对比分析。

Wires attenuator with modern design,simple installation,screwless terminal block maker wiring very easy.

简述：音量控制器：模块化衰减单元、美观、现代的设计适于室内使用，模块化的简易安装方式、电阻耦z合，变压器耦合两种方式作你选择，报警信号强切功能更能体现适用于各种大、小型综合场所。

The exploration of attenuation in the earth from seism observation station always is a defiant question for discussion.

利用地表波测量地球中的衰减一直是一个前沿性的挑战课题。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。