超声的

To determine the value of US in diagnosis of patients admitted with acute appendicitisand whether the sensitivity of US could be increased with the aid of Alvarado scoring system.

为证实超声对急性阑尾炎诊断价值及应用Alvarado评分法对提高超声诊断急性阑尾炎敏感性的价值，将255例以"急性阑尾炎"收住院患者，轮流分入对照组(127例)和研究组(128例)。

Methods: 14 child cases of kawasaki diseasewhich were diagnosed according to the standards adritted commouly were examined withcolor ampler ultrasonic diagnostic apparatus ATL model, made in U.

用美国ATL超9型彩色多普勒超声诊断仪对14例符合川崎病临床诊断标准的儿童患者进行心脏超声检测。

Results revealed that the large side insulation of the stator bar in slot is available for ultrasonic pulse-echo testing; Coupling transducer on the surface of a practical stator bar could minimize the influence on the measurements of velocity, contributing no destructivity of the ultrasonic testing for stator insulation; The simultaneity of same velocity and higher attenuation can be used to detect insulation delamination from conductors; Compared with the wide sides of the bars in slot, the short sides of the bars near the exit from slot and the end bars had a same velocity and a higher attenuation; The velocity might be exactly measured on the shot sides of the bars near the exit from slot and the end bars, while the attenuation might not, which were examined though filed tests; V min decreased greatly and V av decreased slightly with the service time of the bars.

在实验室对线棒多种结构处的主绝缘和不同运行年数(未老化、16、18 和23年)线棒的主绝缘进行了低频超声反射法检测试验，并进行了现场试验，发现(参见 Hao et al， IEEE DEI， to be published)，槽部线棒的宽面绝缘不受换位绝缘的影响，比窄面绝缘更适合超声测量；线棒表面平滑的半导体层减小了耦合剂对超声测量的影响，实现了无损性；波速不变而声衰减减小可以检测线棒出现绝缘与导体脱壳缺陷；出槽口和端部线棒的窄面绝缘与槽部线棒的宽面绝缘相比，声衰减大而波速一致；现场试验验证了波速不受绝缘结构和现场测试条件的影响，而声衰减受以上因素影响很大(参见 Hao et al，中国电机工程学报， Vol.23 No.4)； V min 随运行年数明显减小， V av 随运行年数慢慢越小。

Objective:to determine the value of ultrasound in diagnosing fatty liver and analyze its cause.methods:using ultrasound as diagnostic tool,we analyzed the pathogenesis of fatty liver in 2 350 patients,and at the same time,we recorded their heights,weights,blood lipids levels,blood-sugar levels,drinking time and occupation,et al.results:these was prominent performance in ultrasound examination of fatty liver,and it had high incidence in patients who was overweight,normolipidaemic,hyperglycemia,dipsomania and mental workers.

目的：探讨超声对脂肪肝的诊断及对分析其起病原因的价值。方法：用超声作诊断工具，分析我门诊部2 350例体检病人的脂肪肝发病情况，同时记录病人身高、体重、血脂、血糖、饮酒、职业等。结果：脂肪肝的超声检查有较突出的图像表现，超重、高血脂、高血糖、长期饮酒、脑力劳动者有较高的发病率。

The spectrum analysis of the air-ultrasonic waveform indicates that when the matcher thickness is calculated at the highest spectrum and the subsequent higher spectrum of the pulse waveform, it can obtain a better result. But all the highest spectrum of the air-ultrasonic waveform moves to the high frequency zone in the experiment, which is a possible important reason that the testing extent of the air-ultrasonic transducer is limited.

经对空气超声波形进行频谱分析后发现用脉冲波形的最高谱线及次高潜线对应的频率计算匹配层厚度，可得到较好的匹配结果，但是空气超声波形的最高谱线均移向高频段，这可能是造成脉冲空气超声换能器可检测的范围有限的一个重要原因。

The application of oscillograph principle in ultrasonic imaging is based on the electronic oscillograph imaging principle.

示波器原理在超声成像中的应用是以电子示波器的成像原理为基础，通过医用超声换能器将以机械波形式存在的超声波转换成同频率的交变的电信号，将该信号以不同的方式输入示波器中，从而形成了不同方式的超声图像。

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。

Ascular laboratories must hae strict quality assurance programs to establish optimal internal diagnostic criteria, employ credentialed ascular technologists, and obtain ascular laboratory accreditation (Intersocietal Commission for the Accreditation of ascular Laboratories; American College of Radiology). It is likely that reimbursement for these studies will be limited toaccredited laboratories in the future.

血管超声中心应该有严格的质量保证，建立每个中心自己最优化的诊断标准，聘用有资格认证的血管超声检测技术人员，获取血管超声中心的认证资格（美国放射学会血管研究资格认证委员会）。，将来用于这类研究的资金很可能将仅限于给予这些取得认证的中心。

objective to evahiate the diagnostic value of us in malignant mixed mullerian tumor.methods 17 cases with mmmt were proved by surgery and pathology studied retrospectively and their ultrasonographic features were mainly reviewed.results of the 17 cases, 11 cases were in uterus, 3 cases were in cervixes,l case fallopian tubes,2 cases in ovaries.us can well demonstrate the extent、border and the relationship with adjacent tissue.conculusion the results showed that the 2 d and cdfi can provide valuable information in diagnosing.

摘 要］目的：探讨女性生殖系统恶性mullerian混合瘤的超声图像与病理组织类型的关系，以期为临床诊断提供准确的参考依据。方法：回顾性分析经手术和病理证实的17例女性生殖系统恶性mullerian混合瘤超声特征，并与病理学组织类型进行对比研究。结果：17例病例中发生在子宫体11例，子宫颈3例，输卵管1例，卵巢2例。二维超声能清楚显示肿瘤部位、大小范围、边界以及与临近结构的关系。结合彩色多普勒对肿瘤性质的判定具有重要意义。

In these paper, ultrasonic degradation of methyl orange by adding lower concentration of CCl4 and effects of organic specials on photocatalytic reduction of hexavalent chromium over different TiO2 photocatalysts have been explored, the results are as follows:(1) Effects of CCl4 were investigated on the ultrasonic degradation of azo dye methyl orange.

本文主要研究了低浓度的CCl4对超声降解甲基橙的影响及有机物对不同TiO2催化剂光催化还原Cr的影响，研究结果如下：(1)研究了低浓度的CCl4对超声降解MO的影响，结果表明少量的CCl4能促进MO的超声降解。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。