高频

Results According to the embryologic development of the structures in middle ear, congenital middle ear malformations were classified 4 types.

听力学检查显示A、B、C3组间在语言频率上差异无统计学意义（P=0.1617），而高频（〉2kHz）的听阈B型及C型与A型均具有统计学意义（P〈0.05），并且B、C型先天性中耳畸形存在骨导下降及混合聋。

Yet the performance of EMI filter at high frequency range is not so good.

但一般的滤波器在高频时难以满足设计的要求。

Material and MethodsRA Rabbit Model group: 15 early RA rabbits of the same weight and variety Control group:10 normal rabbits of the same weight and varietyMethods of making RA rabbit model:elect 15 normal rabbits of the same weight and variety, dissolve Ovalbumin in 0.9% sodium chloride solution, to make the solution of 20mg/ml concengtration, blend the same quantity of complete Freund′s Adjuvant equably ,inject the mixed solution into endermic tissue of the rabbit′s scapular section, making the rabbits allergic, inject 1 ml of the mixed solution to one rabbit every time, inject 1 ml of the mixed solution in 5 different places of the rabbit′s scapular section, inject the rabbit one time every week,inject 3 weeks continuously,it turned out to be that the rabbits will be allergic, inject Ovalbumin blent with the 0.9% sodium chloride solution into the knee joint cavity of the rabbits in the fourth week, 5 mg Ovalbumin every knee joint cavity,two knees of every rabbit of the 15 rabbits are both injected,the arthrosis diameter and the exterior temperature of the knees will be added obviously in 24 hours,and they will drop gradually,at the time of the 14th or 21th day, the arthrosis diameter and the exterior temperature of the knees will get to the balance time,the incidence rate of RA is 100%.after the RA model succeeds,it is the early time of RA from the first week to the fourth week,after the fourth week,it is the late time of RA, the cartilage of the femoral condyle and the subchondral bone cortices will be changed unrecoverily.

资料与方法RA模型组：早期RA家兔模型15只，品种及体重接近。对照组：正常家兔10只，品种及体重接近。RA家兔模型制作方法：选取15只成年家兔，体重、品种接近，将卵蛋白溶解于生理盐水，配成浓度为20mg/ml的溶液，与等量完全弗氏佐剂混匀，注入家兔肩胛区皮下致敏，每只家兔每次注射1ml，于肩胛区5个不同区域注射，每周一次，连续注射3周而致敏，第4周向膝关节腔注射卵蛋白生理盐水溶液，每只关节腔注射5mg卵蛋白，15只家兔膝关节全部注射，24h内此关节直径和表面温度大幅度上升，以后缓慢下降，至14～21d达到平台期，发病率达100%。造模成功后第1～4周为早期改变，第4周以后出现不可逆的关节软骨及骨破坏。采用高频超声对RA模型组与对照组的膝关节髌上囊液体厚度、滑膜及股骨髁软骨厚度及软骨下骨皮质的回声情况进行对比观察。结果RA组模型组膝关节髌上囊积液及滑膜的厚度明显厚于对照组，其股骨髁软骨的厚度与对照组相比无明显差异，其软骨下骨皮质与对照组相比无明显改变。

Methods Ninety patients undergoing upper abdomen operation were randomly equally divided into 3 groups. Hemostatic scalpel was used in group A, endotherm knife in group B and stainless steel scalpel in group C.

选择上腹部手术患者90例，随机均分为3组。A组为热凝切割组，B组为高频电刀切割组，C组为普通手术刀切割组。

Endoscopic treatment by endothermy heater forcels biopsy is an effective and safe therapetic method for flat colonic adenoma.

内镜下热活检钳高频电灼治疗大肠扁平腺瘤的方法切实可行、安全可靠，在治疗上有一定的实用价值。

Objective:To sutdy the Value of endothermy heater forcels biopsy in falt colonic adenoma and explore a new minimally invasive technique for the management of flat colonic adenoma.

目的：探讨内镜下热活钳高频电灼治疗技术在临床中应用价值和开创内镜下治疗大肠扁平腺瘤的新途径。

Objective To investigate the value of high frequency ultrasound in the diagnosis and enema reduction of children intussusceptions.

目的 探讨高频超声在小儿肠套叠诊断及水压灌肠复位中的意义。

The simulation results indicate that H_∞mixed sensitivity controller with PI current loop can improve the capability of low frequency noise enhancement and high frequency enervation in wide frequency band, and attenuate noise of torque sensor. The designed control system for EPS system exhibits good robust performances in assist tracking and anti-disturbance, greatly enhances the returnability, driver\'s steering feel, handling characteristic.

通过仿真结果分析表明基于PI电流环的混合灵敏度鲁棒H_∞控制器能在较宽频带范围内增强地面低频信号、削弱高频信号和抑制转矩传感器的噪声，所设计的控制器有较强鲁棒性，助力跟踪能力和抗干扰能力，能有效改善车辆的转向回正特性，提供给驾驶员较为满意的路感，提高车辆的转向操纵性能。

High power's characteristics of the enlarger is greatly to output powers and the efficiency is high.

高频功率放大器的特点是输出功率大和效率高。

High power's characteristics of the enlarger isgreatly to output powers and the efficiency is high.

高频功率放大器的特点是输出功率大和效率高。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！