高频

Sustained AF could be induced easily in all dogs during vagal nerve stimulation in vivo both before and after isolation of all PVs with encircling lesions created by a bipolar radiofrequency ablation clamp device. PV elimination had no effect on atrial effective refractory period or its responses to cholinergic stimulation. Autonomic ganglia were identified by bradycardic and/or tachycardic responses to high-frequency subthreshold local stimulation. Ablation of the autonomic ganglia overlying all PV ostia suppressed the effective refractory period-abbreviating and AF-promoting effects of cervical vagal stimulation, whereas ablation of only left- or right-sided PV ostial ganglia failed to suppress AF.

无论是在双极环状消融所有PV之前或之后，在体刺激颈迷走神经节过程中持续性房颤在所有犬均能轻易被诱导出，PV切除对心房肌的有效不应期或对胆碱的反应均没有影响，通过对高频的域下刺激发生快速或慢速反应来鉴定自主神经节，消融叠加于PV口部的自主神经节能抑制有效不应期的缩短、和刺激颈迷走神经诱发的房颤促进作用，而仅消融左或右侧PV口部的自主神经节却不能抑制房颤。

Parasternal long axis and abdominal aorta long axis images were acquired by a 15MHz high-frequency linear ultrasound transducer at 4 weeks and 8 weeks after operation, respectively.

术后4周、8周采用飞利浦HDI5000超声诊断仪、15MHz：高频线阵探头，经胸骨旁左室长轴切面及腹主动脉的长轴切面进行检测。

Methods: Using high-frequency ultrasound mammary glands of 63 marri ed parous women (age range 22-67 years) who had the history of menstrual disten ding pain of the breast and who were noticed to hae breast nodes were examined and pathologically classified according the WHO standard.

用高频探头对年龄在22～ 67岁，有婚孕史，伴有或不伴有月经期乳腺胀痛，有乳腺结节的63例患者的乳腺进行检查，按世界卫生组织乳腺结构不良病理分型，分析乳腺异常声像图。

Methods: Using high-frequency ultrasound mammary glands of 63 marri ed parous women (age range 22-67 years) who had the history of menstrual disten ding pain of the breast and who were noticed to have breast nodes were examined and pathologically classified according the WHO standard.

用高频探头对年龄在22～ 67岁，有婚孕史，伴有或不伴有月经期乳腺胀痛，有乳腺结节的63例患者的乳腺进行检查，按世界卫生组织乳腺结构不良病理分型，分析乳腺异常声像图。

Four groups were respectively conducted in Morris water labyrinth test, which was used to dect the learning and memory of rats. Population spike in CA3 region was recorded in vivo following stimulation of lateral perforant path ,For the induction of LTP , 4 trains (50 shocks/ t rain , 500 Hz) high-frequency tetanic stimulations were applied to lateral perforant path.

MK-801组除按依赖组剂量注射海洛因外在每次注射海洛因前30分钟注射MK-801(0.3mg/kg)，四组各自进行水迷宫实验测试大鼠学习记忆；在体记录由刺激海马外侧穿通纤维(lateral perforant path，LPP)，所诱发的CA3区群体峰电位电位，并观察高频刺激引起的LTP效应；用逆转录聚合酶链反应技术半定量检测海马NMDA受体NR1、NR2A亚基mRNA的表达。

Objective: To explore the clinical value of high-frequency ultrasound in the diagnosis of perianal abscess.

R445.1A1005-2720-（2010）02-0063-02目的：探讨高频超声诊断肛周脓肿的临床价值。

This method can make sure the structure radiant sound status in total noise and the detail phonate part quickly and correctly.(3) Study on the control mechanism of structure noise radiated from rotary machines, we build a common model of rotary machine structure noise analysis relied on the general characters of rotary machines. Based on this model, we analyzed various influence factors to structure radiant noise using the union of revolution and numerical calculation method. We found that the joint stiffness between the rotor and the frame is the most sensitive parameter of structure radiant noise by calculating and analyzing.

根据本文对于旋转机械结构噪声控制技术的研究结果和惯性振动筛工作的特殊要求，对有关参数的选择进行了讨论，并通过试验为降低惯性振动筛噪声找到了两个新的方法：即，在轴间相对运动要求不高的情况下，可以在激振器与筛体之间安装一组减振器，通过适当选取减振器参数，既可以使机体在工作频率附近获得稳定振幅，保证振动筛正常工作，又可以使机体的高频响应减小，降噪效果显著；反之，如果轴间相对运动精度要求(来源：1aABC论文网www.abclunwen.com)较高，可以采用空心滚动体轴承，在保证滚动体强度的条件下也可以获得较好的降噪效果。

For high-frequency words, the phonologically mediated priming effect was equal to the direct semantic priming effect.

结果发现，不论是高频词还是低频词语音中介启动对目标词的加工都有促进效应。

A little of the diaylsed solution was dilluted with distilled water (1:4) and applied to metallic sample plate following negative staining with sodium phosphotungstate solution. The sample was freeze-dried and examined by transmission electron microscopy 1.4 IFvs size and size distribution measured 1.5 The shape morphology of IFvs 1.6 Measureing the encapsulation efficiency and loading capacity of Liposomal Gd-DTPA A sample volume of 5ml was sent to analyze (Zhongshan University Analytical Center, Guangzhou).

1.6 Gd-DTPA脂质体包封率及载药量的测定取5ml前述离心后所得上清液送交中山大学分析测试中心，采用高频电感耦合等离子发射光谱法测定离心液中Gd-DTPA含量，用加入总的Gd-DTPA量减去离心液中的Gd-DTPA含量即得包封量。

Analyses reveal that shoulder reflection is irrelevant to clothing below 3.0 kHz, while without pinnae clothing has some influence on should reflection and HRTF above 5.0 kHz.

实验结果表明，在3.0 kHz以下肩部反射声几乎与衣服无关；而无耳廓时，不同的衣服对5.0 kHz以上的肩部反射声以及头相关传输函数有一定的影响，但耳廓的存在会掩盖肩部反射的高频部分。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐