查询词典 ultrasonic

Cavitation is the most distinct characteristic of the high-power low-frequency ultrasonic fields, and it is also regarded as the primary mechanism of ultrasonic cleaning. Nevertheless, the measurement question of the high-power low-frequency ultrasonic fields hasn't been resolved well, because of the incomplete cavitation theory and the complexity of cavitation fields. The universal acceptant standard measurement hasn't been found up to the present so that it is difficult to judge of the performance of ultrasonic cleaning machines scientifically.

大功率低频超声场最鲜明的特点就是空化，而空化也被认为是超声清洗的主要物理机制，但由于其理论研究尚不完善，加之空化声场的复杂性，使得至今大功率低频超声场的测量未得到很好的解决，尚未找到一种与清洗效果有确定关系的普遍适用的标准方法，使得在客观地评判清洗机优劣时很困难。

Changes in Xc for different pulp cellulose fibers are not the same during the ultrasonic treatment. Crystallization and decrystallization may both exist during the treatment at the conditions of lower-intensity ultrasonic wave. After treatment with ultrasonic Xc of MBKP cellulose is decreased and that of EBKP is increased. The changes of Xc of different pulp cellulose are more closely correlated to the fibers' morphology size and the cavitation state. The maximum Xc of 84% is obtained when BEKP cellulose is treated under the conditions of ultrasonic frequency f=23-25kHz, power=400w, and treatment time t=720s.

不同原料来源的纤维素纤维，由于形态尺寸和超分子结构的差异，经超声波处理后超分子结构表现出不同的变化规律；超声波处理过程中，结晶和消晶两种作用同时存在；超声波功率对纤维素的结晶度有较大的影响，对晶体尺寸有一定程度的影响，但结晶度Xc与超声功率没有线性关系；在频率为23-25kHz，功率为400W条件下，对桉木漂白浆纤维进行超声波处理，可获得高结晶度（84%）的纤维素样品。

In the extracting process using ultrasonic wave, the preferable technical parameters of extracting polyphenols from the root and stalk of sanguisorba were acquired by changing the particle size of raw material, the ratio of sample weight to solvent volume, ultrasonic time, ultrasonic power, ultrasonic times.

在超声波法浸提过程中，通过调节料液比、原料粒度、超声时间、超声功率、超声次数因素的影响，确定了地榆根和茎中多酚较佳超声浸提工艺参数。

Our products can be widely used in home appliances, communication facilities, alarm systems, parking sensors, ultrasonic measuring instruments, ultrasonic atomizers, ultrasonic cleaners, ultrasonic welding and drilling machines.

公司技术力量雄厚，以自主研发的压电陶瓷材料为基础，所生产的压电陶瓷产品广泛应用于家用电器、医疗美容、通讯设备、报警器材、倒车雷达、测距仪器、流量计量、超声波雾化、清洗、焊接、加工以及人机交互、自动化控制、智能玩具等领域。

This study choose Changle Gaoya reservoir irrigation areas as the study sites, through the installation of different ultrasonic equipment on open channel of non-uniform flow to study the flow gauging of non-uniform flow in open channel:(1)5 tracks ultrasonic open channel flow meter used to real-time monitoring the flow of velocity ,water depth and discharge;(2)Ultrasonic liquid level gauge used to real-time measure the upper level and tail level of the two sections ,then the computer calculated average water level, gradient of water table and discharge;(3)Change the open channel water conveyance into pipeline full flow water conveyance, installed the ultrasonic liquid level gauge and pipe flow gauge on the inflow point and surface of pipe, water level and discharge would detect in real time.

本研究以山东省昌乐县高崖水库灌区为研究地点，通过安装在灌溉明渠上的不同超声波设备对明渠非均匀流的测流进行了研究：(1)用五声波超声波明渠流量计对测流渠段的流速、水深及流量进行了实时监测；(2)用超声波液位计将测流渠段的上下游两断面水位实时测出，再用计算机分时段算出平均水位、水面坡降及流量；(3)将测流渠段明渠输水改造成管道满流输水，分别在管道进口前及管管上安装超声波液位计和管道式流量计，将水位和流量实时测出。

I Division specializes in ultrasonic metal welding head welding machine and steel manufacturing, used in refrigerators; freezer; air conditioners cut brass closures, automotive wiring harness ultrasonic welding , solar heat-absorbing plate rolling ultrasonic welding, aluminum-plastic composite pipe rolling ultrasonic welding, spot welding, such as lithium-ion battery.

我司专长于超声波金属焊接机及钢焊头的制造，应用于冰箱；冷柜；空调等铜管封切，汽车线束超声波焊接，太阳能吸热板超声波滚焊，铝塑复合管超声波滚焊，锂离子电池点焊等。

In the process of building and using the mass concrete structures, because of the effect of out-side condition and themselves, some faults will form in the structure, these faults will effect the bearing capability and endurance Using nondestructive testing method to test the concrete"s quality and diagnose its healthy, which has the significant sense in assessing the safety stability and research of the administering diseasesThis dissertation mostly researched the testing methods in the mass concrete structure, discussed the principles, methods, features, sphere of application of the ultrasonic testing in the mass concrete structure with faults, used dynamic FEM to simulate the testing process, discussed when the concrete structure with cracks is under the effect of the pulse, how the elastic waves propagate and what are their changing feature, Researched the principles of the first-arriving waves" phase when the cracks" depths are not same, obtained the relation between the inversion point and the cracks" depth, which has the direction sense in the application of projects,The second part of this dissertation is CT , which used the ultrasonic wave running through the tested-substance to get arriving-time of the ultrasonic wave, then inverse the image This dissertation drawed one CT program which can well present the different little cells ultrasonic wave velocity profiles of the substance, thereby to diagnose the quality of the part of the tested-substance, CT has the better using foreground..

在混凝土结构的施工及使用过程中，由于受其自身及外界各种因素的影响，常常会产生一些缺陷，对结构物的承载能力和耐久性造成严重影响，采用无损检测技术进行质量检测和健康诊断，这对混凝土结构开展安全、稳定性评估以及病害隐患治理研究具有重要意义。本论文主要针对大体积混凝土结构缺陷的检测方法展开研究工作，重点讨论了超声波法检测混凝土结构裂缝的基本原理和方法及其特点、适用范围，运用动力有限元数值模拟其检测过程，探讨了有裂缝缺陷的混凝土结构在脉冲荷载作用下弹性波的传播及其变化特征，研究了不同裂缝深度下首波相位变化规律，得出了反转临界点与裂缝深度之间的关系，这对实际工程应用具有指导意义。声波CT是一种新的无损检测技术，它是利用声波穿透被检测体获取声波接收时间，来进行计算机反演成像的技术。本文利用直射线法编制了层析成像程序，能较好地呈现被检测物体各微小单元的声波速度分布图像，从而对检测体的质量状况作出诊断评估，具有较好的应用发展前景。

An ultrasonic medical instrument having a handpiece and medical ultrasonic blade assembly including a vibration antinode, a handpiece, and a medical ultrasonic blade.

该超声医疗器械包括手持件和医疗超声刀组件，所述手持件和医疗超声刀组件包括振动腹点、手持件和医疗超声刀。

This thesis has discussed the theory of measuring distance in ultrasonic, which include ultrasonic shaking transmit velocity, central frequency, angle of launch control, measure distance, dynamic measure and so on. According to character of wave shape output by circuit, this thesis has designed an efficient way to diminish noise that enables precision of the ultrasonic sensor to 0.2%.

论文详细论述了超声波测距的基本理论，包括超声波震动传播速度、中心频率、发射角控制、发射能量、检测距离、动态检测等；并根据电路输出波形特征设计了有效的降噪方法，使超声波传感器的精度达到了0.2%，然后对降噪后的信号进行了标定。

And, the design of ultrasonic generator is a key step in the design of sonochemistry reactor.The character of ultrasonic generator and the merit of embedded technology were analyzed in the thesis. And an ultrasonic generator based on embedded technology was designed.

论文在分析功率超声电源特点的基础上，从课题需要出发，结合嵌入式技术的优点，设计了基于嵌入式系统的声化学用智能化的超声电源。

The research is not only conducive to the development of the modern Chinese and English lexicology, etymology, semantics, pragmatics, syntactics and translatology but also to the research of the general linguistics, theoretical linguistics and contrastive linguistics.

该研究不仅有助于对汉、英派生动词的正确理解、恰当使用和准确翻译，亦对现代汉、英词汇学、词源学、语义学、语用学、句法学、翻译学、普通语言学、理论语言学和对比语言学有所裨益。

We can see people working in the vineyards on the hillsides.

我们可以看见许多在半山腰葡萄园工作的人。