查询词典 longitudinal split

The dispersion relations of superluminal waves for the longitudinal collective modes in unmagnetized, collisionless and homogeneous relativistic electron-positron plasmas are derived.

导出了无磁化无碰撞各向同性相对论正负电子对等离子体纵波的色散关系。

Single-longitudinal-mode laser output can be realized by employing a Fabry-Perot filter and a saturable-absorber-based autotracking filter composed of an unpumped EDF and an optical reflector.

而本S频段的单模光纤回路型雷射是利用一个S频段的EDFA模组、一个光纤式法布里－珀罗（Fabry-Perot）可调滤波器、一段尚未泵激且较短的 EDF及一个反射镜所组成。

A single-longitudinal mode fiber laser with fiber saturable absorber is designed. Tunable fiber Bragg grating as the wavelength selector is in the ring cavity with a 2 m-long unpumped erbium-doped fiber.

设计了一种基于光纤饱和吸收效应的环形单纵模光纤激光器结构，以可调谐光纤布拉格光栅作为波长选择器件，与2 m未抽运掺铒光纤一起位于环形腔反射臂上。

The function of 3dB fiber loop mirror in fine wavelength partition is studied. With this theory, a novel narrow linear band, dual-wavelength switchable Er-doped fiber laser is realized.2. An unpumped Er-doped fiber and broadband fiber Bragg grating with high reflectivity is served as an auto-tracking filter, where the space hole-burning effect appears when the laser signal travels and forms standing wave, thus the generation of multi-longitudinal-mode is suppressed. Then the high birefringence fiber loop mirror is introduced to act as comb-liked wavelength filter.

主要包括：1、发现3dB光纤环镜的精细波长分割作用，并利用这种分割机制，研制成功一种窄线宽、双波长可转换的掺铒光纤激光器。2、利用未受泵浦的掺铒光纤以及宽带高反射率的光纤布喇格光栅做自动跟踪滤波器，当穿行其中的激光信号构成驻波时，出现了空间烧孔效应，从而抑制了多纵模的产生，引入高双折射光纤环镜做梳状波长滤波器。

3In the normal space tensile,after controling the influence of density, the variation ofmicrofibril angle had a decisive effect on L MOE and longitudinal tensile strength of D333A wood microtome section; the Correlation coefficient between microfibril angle and L MOE became significant at 0.05 level for D1123A wood microtome section; the Correlation coefficients were all unsignificant between microfibril angle and L MOE and between microfibril angle and longitu- dinal tensile strength to D1223A wood microtome section.

正常间距拉伸中，控制密度的影响后，微纤丝角的变化对D333A组微切片纵向MOE和抗拉强度的变化起着决定性作用；对D1123A组微切片纵向MOE的相关系数达到0.05水平上显著；对D1223A组微切片纵向MOE和抗拉强度都成负相关关系，但都达不到显著水平。

WC particles also can make the abrasive particles obtuse ,consequently reduce the cutting of abrasive particles to the coating.(7) The coating surface with unsmoothed units make the abrasive particles change moving direction . They can change the ploughing to rolling and bring light longitudinal vibration contributing to reducing the shearing force when the surface are worn by abrasive particles.

具有非光滑结构单元的复合层表面使参与复合材料磨损的磨粒改变运动方向，使之由滑动变为滚动，产生有利于减小切向力的法向微振动，减少磨粒和复合材料的接触面积和作用时间，从而大大减轻了磨粒对复合材料表面的损伤。

The left ventricular mechanical motion included longitudinal motion,radial motion and twisting.And the twisting and untwisting of left ventricle have been new indexes of the heart function.Cardiac resynchronization therapy has been shown to a valuble stragy for heart failure patients.

左室机械运动包括纵向运动、径向运动和扭转运动，目前左室的扭转与解旋运动已成为评价机械功能的一个全新的指标，目前心脏再同步化治疗是药物治疗外一项有效治疗心力衰竭的策略。

This interdisciplinary, prospective, longitudinal study included a total of 68 patients with acute vestibular vertigo syndromes.

这项多学科的、前瞻性的纵向研究一共包括68位伴有急性前庭性眩晕的患者。

Methods Longitudinal survey data of the aged population in China in 2006 and the Chinese version of the 15-item Geriatric Depression Scale (GDS-15) wese used.

利用2006中国城乡老年人口状况追踪调查数据和老年抑郁短量表（GDS-15）为评定工具。

objective to analyze depression symptoms and their related factors in urban widowed elderly in beijing.methods longitudinal survey data of the aged population in china in 2006 and the chinese version of the 15-item geriatric depression scale (gds-15) wese used.

目的 探讨北京市城市丧偶老人抑郁症状及其影响因素。方法利用2006中国城乡老年人口状况追踪调查数据和老年抑郁短量表（gds-15）为评定工具。

Objective:To compare the response control and attention of Schizophrenic patients with that of the healthy controls by Integrated Visual and Auditorycontinuous performance test. To quantitate the impairment of cognitive function in patients, and to explore the relationship between cognitive function and the severity of the disorder.

目的：探讨精神分裂症病人在IVA持续操作测试中的反应控制能力、注意力等，并与健康人进行比较，从而量化精神分裂症病人的认知功能损害，并进一步探讨其认知功能与疾病严重程度的关系。

Main effective factors including subcooling degree, mechanical vibration, gas hydrate reformation, environment temperature, noncondensing gas and surfactant are analyzed.

指出过冷度、机械振动、重复生成水合物、环境温度、不凝性气体、添加剂是影响气体水合物生成的主要因素，还对R152a水合物的放冷进行了实验研究。