超声波的

Characteristic data have been worked out, including the maximum Lyapunov index λ, fractional dimension D, lacunarity Λ and eight energies of various frequency bands. After being normalized, they can function as the characteristic vectors. Then, they are transmitted into an artificial neural network to perform pattern recognition.Starting from the mechanism of ultrasonic generating, initial ultrasonic pulses are calibrated. A stylish discharge source is directly coupled with the ultrasonic sensors, and work out actual discharge magnitude.

利用非线性和非平稳的方法对超声波信号进行了分析处理，对于局部放电模型得到的信号，计算了超声波信号的Lyapunov指数、分维数D、空缺率、小波包分解的8个频带能量，得到了11个特征数据，归一化处理后形成特征向量，由人工神经网络进行识别，实现了对局部放电典型模型的模式识别，显著提高了模式识别的正确率，并分析了传播途径对识别的影响。

Secondly, the paper introduced how to implement safety detection by ultrasonic sensor, and presented systemically all the design of collecting and processing signals, storage circuit, lithium battery charging and discharging circuit, data communication circuit, keypads and LCD. This paper studied the code of uC/OS-II and introduced how to port uC/OS-II onto LPC2214. The Real-Time Kernel uC/OS-II is a highly portable, ROMable, very scalable, preemptive real-time, multitasking kernel for microprocessors and microcontroller.

然后论文具体介绍了如何实现超声波传感器进行实时安全监测，并系统的介绍了超声波监测系统的信号采集，处理，存储电路，锂电池充放电控制电路，数据通讯电路，键盘，显示器等的设计；也详细的介绍了多任务操作系统uC/OS-II的源代码及如何在LPC2214上移植等。uC/OS-II是一个移植方便的、可固化的、可裁剪的、占先的多任务实时内核。

The variation of pH and conductivity of various phosphate solution with the solution temperature were obtained based on the physical chemistry theory and ionization equilibrium theory in electrolytic solutions, and be testified experimentally under radiation of ultrasonic wave. The pH was a linear function with the reciprocal of thermodynamic temperature, and the conductivity was a linear function with the temperature in phosphate solution.

三、超声波对双水相系统组成物质、两相组成及溶质分配影响的研究根据物理化学原理和电解质溶液电离平衡理论分析推导和实验验证，揭示了超声波作用下不同组成磷酸盐溶液的pH值和电导率随溶液主体温度变化的规律：磷酸盐溶液的pH值与溶液主体绝对温度的倒数成线性关系，磷酸盐溶液的电导率与溶液主体温度成线性关系。

The paper also describes the function of the HP VEE and the system structure as well as the temperature measurement of the ultrasonic PVC plastic welding.

文中采用基于HP VEE的温度场测量系统来测量超声波塑料焊接的温度场；并介绍了HP VEE的功能、该温度场测量系统的组成和采用该系统进行的超声波焊接PVC塑料的温度场检测试验。

Firstly, this paper compares several methods often used to remove scale in industry application, then analyzes and introduces the antiscale mechanism and structure of ultrasonic descaler, and lastly uses detailed cases to verify the antiscale effect of ultrasonic descaler in different environment and usage. The spreading of this product has significant value in environment protection, saving energy, improving efficiency and reducing cost, etc.

本文首先比较了工业生产应用中常用的几种不同的清垢方法，并对超声波防垢器的防垢机理、原理结构进行了分析和介绍，最后通过各种详实的使用案例资料，有效地证实了超声波防垢器在不同环境和用途中的防除结垢效果，其推广价值在环保节能、提高工效、降低成本等诸方面具有广泛的意义。

In this paper,The necessity of frequency tracking in ultrasonic cleaning equipmens is discussed.Based on a introduction on the principle of the mian circuit of the ultrasonic power supply for cleaning equipmens and the principle of PLL ,the output frequency of 74HC4046 is changed by a singlechip measuring the phase difference between volage and current.

本文讨论了超声波清洗机中自动频率跟踪的必要性，在介绍超声波清洗机的主电路原理、PLL锁相环原理的基础上，利用单片机检测超声电源负载的电流、电压的相位差，来改变74HC4046 的输出频率，完成了变步长频率跟踪软件设计。

In this paper,the necessity of frequency tracking in ultrasonic cleaning equipmens is discussed.Based on introduction on the principle of the mian circuit of the ultrasonic power supply for cleaning equipmens and the principle of PLL,the output frequency of 74HC4046 is changed by a single chip measuring the phase difference between volage and current.The software of adaptive tracking technique with varied frequency steps is completed.

讨论了超声波清洗机中自动频率跟踪的必要性，在介绍超声波清洗机的主电路原理、PLL锁相环原理的基础上，利用单片机检测超声电源负载的电流、电压的相位差，从而改变74HC4046 的输出频率，完成了变步长频率跟踪软件设计。

Stainless steel and acid-resistant keramics showed less effect on the water's qulity, while the fiber steel which had used for storage in the experiment showed great effect.5 The addition of ultrasonic could remarkably enhance the removal effect of the organics in electrocoagulation treatment, and the removal rate was enhanced with the increasing ultrasound power.

在电流密度为3A/m2，电极板间距为5mm，停留时间为30min的条件下，电凝聚对TOC去除率为53.57%，施加600W超声波后提高到了73.71%；与单纯的电凝聚法相比，采用超声波—电凝聚处理时，水中各分子量区间有机物的去除率提高了11.73%～39.56%；亲水性和疏水性有机物的去除率分别提高了16.67%和28.30%。

Based on signal from carbon fiber composite defects such as lamination, hole, looseners in ultrasonic testing, this paper performs wavelet packet transform on the ultrasonic signals to extract statistics of approximation coefficients and detail coefficients that contain a great part of signal energy as sample-features.

摘要本文以碳纤维复合材料常见缺陷分层、孔隙、疏松的超声波检测缺陷信号为研究对象，对超声波检测信号进行小波包变换，提取包含信号绝大部分能量的近似系数波形特征及细节系数的统计量作为样本的特征值。

The starting character that studies electric machinery of ultrasonic of wave of laden be issued to lower levels in development, moving character, timing character, pace enters characteristic, area on the foundation of laden ability, announced load affects the pattern to small step pilot, the robot much freedom that put forward to be based on drive of electric machinery of travelling wave ultrasonic spends articulatory and exact location to control a method.

在深入探究负载下行波超声波电机的启动特性、运行特性、调速特性、步进特性、带负载能力的基础上，揭示了负载对微步控制的影响规律，并提出了基于行波超声波电机驱动的机器人多自由度关节精密定位控制方法。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。