查询词典 phased

Eventually we'll be extinct anyway, but it would be so much nicer if we phased ourselves out through natural attrition," Knight told me affably."

他只是希望人们选择不要生育。

First of all, this paper introduces the whole design project and interrelated knowledge about Non-destructive detection, ultrasonic detection, and Phased-Array ultrasonic detection Then the paper depicts the principle of Phased-Array focus and abstracts a set of math model and feasible arithmetic on the base of the real parameter of the system. Put forward several problems that exist during the course of system development and program. Introduce some measures of distinguish that are often used in non-destructive detecting and echo wave crest. Then I depict one of the measures in detail that used in the course of non-destructive detection, which is the way of distinguishing whether defects exist or not. Then provide part core program to realize it. This paper also provides main flow chart through analyzing how main control program controls different parts to make the whole system more effective.

然后在文中以较大的篇幅，描述了相控阵聚焦的原理，并根据该系统的实际参数，抽象出一套数学模型和可行的算法，在此基础上提出了在系统开发过程及编程实现过程中存在的一些问题；介绍了在无损检测中缺陷的分类和对回波峰常用的识别方法，详述了系统开发过程中使用的其中一种识别方法，即判别是否存在缺陷的算法，并给出实现之的部分核心程序；详述主控程序如何控制各部分并协调各相关软件的工作，使整个系统发挥最高效能，并给出主要设计框图和程序。

Phase shifter is a key component of phased-array radar. It's performance has direct effects to phased-array radar system.

移相器是相控阵雷达中的关键部件，其性能的优劣对相控阵雷达系统存在重要影响。

In this paper, the principle of the phased array technology will be explained, and then several applications of phased array will be introduced, including the railroad axle inspection applications, railroad wheel testers, paintbrush technology for fast speed tube inspections, multi-zone inspection applications, phased array for tube/bar testers, and phased array squirter systems for aircraft applications.

探讨的应用包括：火车轮轴及车轮的检测，高速管道检测系统，多聚焦区检测技术，以及相控阵技术在用于检测航空材料方面的喷水式系统的应用。

Contrasted with the activity of the same reaction in oil-water double phased system, the hydrolyzing behavior of Camlicla Lipolytica Lipase in reversed micellar systems is much like that in oil-water double phased system. The stability and catalyzing activity are both enhanced and give rise to "superactivity". except in reverse micelles composed of cationic surfactant.

实验表明，脂肪酶CLL在反胶束体系中催化水解反应的行为与油-水双相体系中的行为大体相似，在阴离子和非离子型表面活性剂构建的反胶束中，酶的稳定性和催化活性都有所增加，呈现&超活性&。

A kind of acoustic phased arc array transmitter was designed for azimuthal radiation. 3D Finite difference method was used to calculate acoustic field in borehole formation generated by the acoustic phased arc array transmitter in fluid-filled borehole.

设计一种具有方位辐射特性的声波测井相控圆弧阵声波辐射器，采用三维有限差分法对其在井旁地层中产生的声场进行了数值模拟。

An acoustic phased arc array transmitter with azimuth radiation was designed. The acoustic field generated by the acoustic phased arc array transmitter in the borehole formation was simulated using the 3D finite difference method.

设计了一种具有方位辐射特性的声波测井相控圆弧阵声波辐射器，采用三维有限差分法对其在井旁地层中产生的声场进行了数值模拟。

This paper analyzed the advantage and disadvantage of three sound wave focus methods, that is lens focus, curved autofocus, and phased-array focus on the base of draw lessons from supersonic focus technic, consequently preferred and designed the infrasonic phased-array focus system.

文中在借鉴超声波聚焦技术的基础上，分析了透镜聚焦、曲面自聚焦、相控阵聚焦等三种声波聚焦方法的利与弊，从而选用和设计了次声相控阵聚焦系统。

The article presents the developing condition of PWM and SVPWM first.Then the theory of SVPWM is discussed in detail.The SVPWM is based on the thought of magnetic chain tracking.It makes the ideal magnetic chain circle of three-phased sysmmetry electric motor supplied by three-phased sysmmetry sine wave voltage for basis,uses the practical magnetic chain vector formed by the different switch modes of three-phased inverter to track the basic magnetic chain circle.During the course of tracking,the inverter changes the switch modes properly to form the PWM waves.Then the modulation wave of SVPWM is analyzed in detail.The modulation wave of SVPWM is implicit,but the analogous modulation wave in A-B-C axis needs to be calculated in order to expose the internal relation of SVPWM and SPWM.That is to show the implicit modulation wave of SVPWM. SVPWM actually is a transformed SPWM ruly sampled by the modulation wave which is injected by the zero prefaces based on space vectors.

本文首先对脉宽调制技术的发展现状进行了综述，在此基础上分析了电压空间矢量脉宽调制技术的发展现状；接着对空间电压矢量脉宽调制技术的基本原理进行了详细的分析和推导，SVPWM是基于磁链追踪的思想，它以三相对称正弦波电压供电下三相对称电动机定子理想磁链圆为基准，由三相逆变器不同开关模式下所形成的实际磁链矢量来追踪基准磁链圆的，在追踪的过程中，逆变器的开关模式作适当的切换，从而形成PWM波；然后详细分析了电压空间矢量脉宽调制技术的调制波，虽然SVPWM法的调制波是隐含的，但是为了揭示SVPWM法与SPWM法的内在联系，需要求出SVPWM在A-B-C坐标系上的等效调制波，也就是将SVPWM的隐含调制波显化；SVPWM实质是一种基于空间矢量在三相正弦波中注入了零序分量的调制波进行规则采样的一种变形SPWM。

The main work and the results are as follows: 1、 This paper introduces the characteristic, predominance, development of high intensity focused ultrasound, especially in phased-array systems. Surrounding with the phased-array system, different sorts of applicators, different distribution of elements and the main calculate methods are presented.

论文的主要工作和相关结果如下： 1、首先介绍了HIFU技术的特点、优势和发展历史以及相控阵HIFU的原理和优势，并根据本文所涉及到的内容，简单介绍了相控HIFU源的分类，阵列设计以及目前主要用的计算方法。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。