查询词典 sinusoidal wave

Milling machine, lathe, drill press, grinder, sparks machine accessories: universal dividing head, sub-dial, tilt angle plate, three-jaw lathe, four claw chuck alloy top, activities leading, single two-way Punch Former, and molybdenum wire , G word folder, UHT pneumatic tools, drill bits folder, wheel machines, grinding machines, degaussing devices, tools, Motorola, angle pads regulation, sinusoidal magnetic Units, sinusoidal regulation, Dresser, and Punch Grinding Machine, Plastic Punch , and the balance Units, such as the electrode rods.

铣床、车床、钻床、磨床、火花机配件：万能分度头、分度盘、倾斜式角度盘、车床三爪、四爪卡盘、合金顶尖、活动顶尖、单双向冲子成型器、钼丝、G字夹、UHT气动工具、钻头夹、砂轮机、磨针机、消磁器、工具万力，角度垫规、正弦磁台、正弦规，砂轮修整器，冲子研磨机、冲子整形器，平衡台，电极棒等。

After 20, 40, 60 or 90 minutes ischemia and 120 minutes reperfusion, the ratio of necrotic to no-necrotic liver were 3.9%, 13.5%, 66.4% or 82.7%, of those the percentage necrosis during reperfusion 120 minutes was 7.7%, 11.1%, 68.1% or 67.2% respectively; The liver volume of blood flow decreased to 94.7%, 85.3%, 55.9% or 43.5% of normal values in end of ischemia; Liver sinusoidal obstruction by blebs originating from the hepatocytes, fragments of sinusoidal endothelial cell damage and aggregation of blood cells was observed in group of 60, 90 minutes ischemia.

血流阻断20、 40、 60和90 min组再开放2 h，肝总坏死范围分别为3.9%、 13.5%、 66.4%和82.7%，其中肝血流开放后的肝坏死范围分别占肝总坏死范围的7.7%、 11.1%、 68.1%和67.2%；肝门静脉恒压灌流量于阻断期末分别下降5.3%、 14.7%、 44.1%和56.5%；肝血窦在阻断20、 40 min组无阻塞现象，阻断60和90 min组出现血细胞，膜浆泡和纤维束积滞，阻塞血窦面积占肝血窦总面积的50%。

Sinusoidal signal generator source file achieve sinusoidal signal generator, very useful and welcome to download.

详细说明：正弦信号发生器源文件实现正弦信号发生器，非常有用，欢迎下载。

As the foundation of ultrasonic testing of composite materials, this thesis is intended to explore in detail a number of features of wave propagation in anisotropic plates, and the following essential problems will be considered:(1) Propagation of plane bulk waves in homogeneous and orthotropic anisotropic media;(2) Lamb wave propagation in multilayered anisotropic plates;(3) Influence of isotropic solid or liquid loading on Lamb wave propagation in anisotropic solid media;(4) Influence of interface layers on Lamb wave propagation in layered anisotropic composite laminates;(5) Dispersion characteristic analysis of attenuation Lamb wave while existing an thin viscous layer which is used for simulating the poor curing in adhesively bonded joints.

作为复合材料超声检测的基础，本文研究了如下国际前沿性的课题：（1）平面体波在正交均匀各向异性媒质中的传播；（2）多层各向异性媒质中Lamb波的传播；（3）各向同性固体或液体负载对各向异性固体媒质中Lamb波传播的影响；（4）界面层对层状各向异性复合媒质中Lamb波传播的影响；（5）胶粘剂未固化而呈现粘弹性时粘接结构中衰减Lamb波的频散特性分析。

The paper presents a linear transient solution for the solitary wave generated by a piston-type paddle in a finite flume based on the boundary condition derived by Dean and Dalrymple (1991). The wavemaker problem is simplified by decomposing the wave potential into two parts. One is the evanescent wave and the other is progressive wave. The possible solution for the evanescent wave is expressed in form of the Fourier series.

本文根据Dean与Dalrymple（1991）描述造波水槽内部之线性边界条件，将水槽内部之流速势分为振荡波与前进波以简化问题，再以Fourier级数展开，可将问题化为二非齐次常微分方程式，在给定造波初始条件的情况下即可解析有限长度造波水槽自静止开始造波一段时间后停止之线性暂态解。

Compared with the initial value problems of scalar conservation laws with smooth flux function, the global weak entropy solutions for the initial-boundary value problems of scalar conservation laws with weak discontinuous flux function include the following new interaction types: a rarefaction wave collides with the boundary and is absorbed compltetely or partially by the boundary; a rarefaction wave collides with the boundary and the boundary will reflect a contact or non-contact shock wave; a contact or non-contact shock wave collides with the boundary and is absorbed by the boundary; a contact or non-contact shock wave collides with the boundary and a new non-contact shock will rebound from the boundary simultaneously or later.

与具有光滑流函数的单个守恒律的初始值问题相比，具有弱间断流函数的单个守恒律初边值问题的整体弱熵解中包括下列新的相互作用类型：稀疏波碰到边界并被边界部分或全部吸收；稀疏波与边界相撞，边界反射出一个接触或非接触激波；接触或非接触激波碰到边界并被边界吸收；接触或非接触激波与边界相撞，边界同时或稍后反射出一个新的非接触激波。

Results: Objective hearing loss were at different levels, with the main wave (including wave ⅠⅢ and Ⅴ) having 4 kinds: with each wave peak latencies and interpeak latencies at normal range; with each wave PL prolonged but IPL at normal range; with IPL prolonged; and main wave being absent dissimilarly.

结果 客观听力不同程度损失，主波分化有4种情况：①Ⅰ、Ⅲ、Ⅴ波都能引出，各主波峰潜伏期、峰间潜伏期在正常范围；②Ⅰ、Ⅲ、Ⅴ波都能引出，IPL均延长，IPL正常；③Ⅰ、Ⅲ、Ⅴ波都能引出，IPL延长；④各主波有不等缺失。

We develop and apply the Hirota bilinear-θfunction method,Jacobi elliptic function expansion method,linear superposition method and F-expansion method respectively to solve many 2+1 dimensional nonlinear wave models including 2+1 dimensional 2DsG equation,the coupled ZK equation,2+1 dimensional KdV equation,2+1 dimensional long wave short wave resonance interaction equation and 2+1 dimensional dispersive long wave equation,abundant Jacobi elliptic function doubly periodic solutions are derived.These solutions show various periodic wave shapes and special periodic characters.

发展和应用Hirota双线性-θ函数方法，雅克比椭圆函数展开法，线性叠加法，F-函数展开法等分别求解2+1维2DsG方程，耦合ZK方程，2+1维KdV方程，2+1维长波短波共振相互作用方程，2+1维色散长波方程，获得丰富的雅克比椭圆函数双周期波解，描述了一些周期波形态及周期特性。

Based on the item of national high technology development project, the thesis studies the reasonable construction pattern of the tunnel portal, incidence of the micro-pressure wave and the the effect of bell-mouthed hood, lacunaris hood and expansile hood on alleviating the micro-pressure wave in the situations of single line and double line, obtains the relationship between the max micro-pressure wave and the velocity of the train as well as the relationship between the max micro-pressure wave and distance of measuring point at the velocity of 100km/h-550km/h, compares the different alleviative effect of the three different hood to max micro-pressure wave and finally proposes the reasonable construction pattern of the tunnel portal.

本文针对国家高技术研究发展计划(863计划)课题"磁浮交通沪杭线越黄浦江隧道的工程技术问题研究"，在单洞单线和单洞双线两种工况下，对隧道洞口的合理结构形式和影响范围，以及洞口喇叭形入口缓冲段、多孔壁入口缓冲段以及隧道出口膨胀室对减缓微压波的作用进行了研究，得到了磁浮列车速度在100km/h～550km/h时隧道出口微压波最大值与速度的关系以及微压波最大值与测点距离的关系，比较了三种不同形式缓冲结构对微压波最大值的减缓效果，提出了隧道洞口的合理结构形式。

Derives the formulae for calculating the distortion and stress on the acting surface of flexspline load in the drive process of the harmonic gear drive with three-wave wavegenerator;(2) analyzes and compares the performance of plastic and steel products under light load drive and calculates the probably reached limit of drive ratio for both types of flexsplines under the same load;(3) applies the harmonic gear drive with three-wave wavegenerator to the small-sized multiple-revolution electric device of valves by taking into consideration of the low limit of the drive ratio for the harmonic gear drive with three-wave wavegenerator made of plastics, improves the design on the main drive mechanism of the traditional small-sized multiple-revolution electric device of valves, and validates through examples the feasibility for the harmonic gear drive with three-wave wavegenerator made of plastics to be applied to the small-sized multiple-revolution electric device of valves. Finally the author performs calculations on the two types of the flexsplines of the harmonic gear with three-wave wavegenerator by using the finite element method and analyzes the causes for the errors.

本文根据三波谐波齿轮传动的运动变形特点，采用弹性薄壳的力矩理论，推导了三波谐波齿轮传动柔轮载荷作用面上的变形及应力计算公式；分析比较了轻载传动情况下塑料和钢材的性能，计算了塑料制谐波柔轮和钢制谐波柔轮在相同载荷情况下可能达到的传动比极限；对塑料制及钢制三波谐波齿轮柔轮进行了有限元计算，分析了产生误差的原因；针对三波塑料谐波齿轮传动比极限低的特点，将之运用于小转矩多回转阀门电动装置中，对传统的小型多回转阀门电动装置的主传动机构进行了改良设计，并通过实例验证了三波塑料谐波齿轮传动在小转矩多回转阀门电动装置中应用的可行性。

Objective:To explore the feasibility of laparoscopy in diagnosing and treating of abdominal diseases.

目的：探讨腹腔镜用以诊断腹部外科疾病及选择治疗方案的可行性。

The lifetime of nylon 1010 and nylon 1010/POSS composites decreased with increasing temperature.

热重-红外联用分析表明尼龙1010在氮气气氛下的降解产物主要为小分子的低聚物，POSS并不改变尼龙1010降解产物的组成。