查询词典 reference level

With the reference of statistical date, We use AHP to decide the index weighting and get the composite index number, analyzing aggregate level and single level.

依据相关统计数据计算出西安城市化综合指数，分析了西安城市化的总体水平和单项水平。

The detection of estrin level can provide theoretical reference for the clinical hormone replacement therapy. Peri menopausal female ; Estrin level ; Radioimmunoassay

因此 ，准确的雌激素水平的测定将为临床的激素替代疗法提供理论参考。1 材料和方法1 。1 标本5 0例血标本均采自自愿到实验室接受检测的患者。1 。2 主要试剂血清雌二醇放射免疫测定试剂

This fixture should be provided with a reference level ing surface, so that it can be kept level as the balance deflects

这种装置应该有一个水平基准面，以便在天平变形时能够使之保持水平。

Through the widly use of in-direction selected topic tacic, mainly develop the explore ability while making mistakes. According to investigation and study, it may help develop the self-thinking ability of the students and also the practise level, team work spirit, the sense of responsibility; Many faced and mutually worked evaluatation tactic is a negation for traditionnal evaluatation, it is good for the establish of newly relationship between teachers and students also students themselves, it may help the rising of students'study level and their self-confident, then the perfect of oneself. I hope this text will have some teahing reference for teachers, thus this text would have little help for the implementation of Chinese comprehensiveness studing.

通过非指示性选题策略的应用，突出培养学生在尝试错误的过程中的自主探索能力；通过实施小组合作性调查研究策略，培养学生的独立思考能力，提高实际操作水平，培养合作精神，增强社会责任感；多元互动的评价策略是对传统的评价的否定，有利于建立新型的师生关系和生生关系，使学生在提高学习水平的同时提升自信，逐步完善自我；希望我的论文能为广大一线教师提供教学参考，为语文综合性学习的实施尽微薄之力。

With the Japanese students of different Chinese level as principal participants and American students of middle-advanced Chinese level as reference objects, the paper analyzes the form of tune error, the content and period of "fossilism", and the sequence and process of acquisition.

本文以教学实践中发现的外国留学生存在&洋腔洋调&问题为主要探讨内容，选择日本和美国留学生作为调查对象，锁定汉语声调学习为切入点，对一定时期的两国学生声调学习进行细致地剖析。

In this paper, the 3-D finite element relocating mesh method is used to calculate the temperature field and the thermal creep stress field of spillway dam and mid level outlet dam in certain roller compacted concrete gravity dam, sensitivity analysis have been down with different parameters, such as placing temperature, the location of cooling pipe, cooling temperature, time for water supply, ascended-layer of concrete, intermissive time and different placing time, and the commendatory construction scheme have been put forward in such analysis; according by the test result on the two scheme of concrete aggregate combination (basalt as coarse aggregate and limestone as fine aggregate, basalt as coarse aggregate and basalt as fine aggregate), simulation analysis on temperature field and thermal creep stress field of the commendatory construction scheme have been down, and analysis have also been down on temperature field and thermal stress field of the two different aggregate combination, the result indicates that the spillway dam and mid level outlet dam which adopted these two aggregate combination can both satisfy the require of design crack resistance in concrete, furthermore limestone as fine is better than basalt as fine aggregate; the effect of summer water storage and winter water storage on the temperature field and thermal stress field have been analyzed, comparing with winter water storage, in summer water storage scheme the maximum tensile stress at abnormal concrete in upstream fill is decreased by 0.1～0.3MPa and there are no evidence change of the maximum tensile stress at other parts, which indicate that summer water storage is avail for the crack resistance of upstream fill; according to the simulation calculating result and comparing temperature simulation calculating results and temperature controlling measures of some similarity projects both completed and construction, synthesis appraise have been carried to the design temperature controlling measures of dam, and the temperature controlling measures of this project have been brought forward, all these have great reference value on the design of temperature controlling measures and the optimization of the construction scheme.

本文采用三维有限元浮动网格法仿真计算程序，对某碾压混凝土重力坝的溢流坝段和中孔坝段分别进行了三维有限元温度场和温度徐变应力仿真计算分析，对浇筑温度、冷却水管的布置方式、冷却水温、通水时间、浇筑升程和间歇时间、不同开始浇筑日期等参数进行了敏感性分析，在此基础上提出了推荐的施工方案；根据两种骨料方案(玄武岩粗骨料+灰岩细骨料方案；玄武岩粗骨料+玄武岩细骨料方案)的混凝土性能试验研究成果，对推荐的施工方案进行了温度场和温度徐变应力仿真计算，并对比分析了两种不同骨料情况下的温度场和温度应力，结果表明溢流坝段及中孔坝段采用上述两种骨料均能满足混凝土的抗裂设计要求，且灰岩细骨料优于玄武岩细骨料；计算分析了夏季蓄水和冬季蓄水对坝体温度场和温度应力的影响，夏季蓄水方案与冬季蓄水方案相比，坝体上游变态混凝土区域最大拉应力小0.1～0.3MPa，其他部位最大拉应力无明显变化，夏季蓄水对坝体上游面混凝土的抗裂有利；根据仿真计算成果并通过比较国内一些已建和在建的类似工程的温度仿真计算成果及采取的温控措施，对大坝的设计温控措施进行了综合评价，并提出了该工程的温控措施，对温控设计和优化施工方案具有重要参考价值。

OBJECTIVE: To explore cervical adjacent zygapophyseal joint stress distribution following two level ADR and anterior cervical discectomy and fusion, so as to provide biomechanical reference for clinical application of two level ADR.

目的：观察轴向载荷对双节段颈椎人工椎间盘置换和前路椎间融合内固定对邻下位节段关节突关节内压力的影响，以期为双节段人工颈椎间盘置换的临床应用提供生物力学依据。

Department of orthopaedics, Xiangya Hospital, Central-south University, Changsha, China3 Objectives: To study cervical adjacent zygapophyseal joint stress distribution following two level ADR and ACDF on, in order to provide biomechanical reference for clinical application of two level ADR. Methods: Eleven healthy adult fresh-frozen multi-segmental cervical spine segments were utilized in this study and biomechanically evaluated under the following C4/5, C5/6 cervical disc conditions:⑴intact spine;⑵he Bryan Disc prosthesis implantation;⑶the intervertebral fusion.

取11具新鲜完整的成人下颈段标本，按实验先后分别制成C4/5、C5/6椎间盘完整、椎间盘置换、椎间融合三个模型组，在标本上施加轴向分级载荷，将微型阻电式压力传感器置入C5/6、C6/7关节突关节内，测量合组各分级载荷下C5/6、C6/7关节突关节内的压力。

The tectonic stress is prominent at shallow level and the dead-weight stress is prominent at deep level, which provides important reference basis for excavating simulation and long-term stability analysis of slope.

计算结果表明，大岗山坝区初始地应力场是一个在浅部以构造应力为主、在深部以自重应力为主、由构造应力和自重应力联合组成的中等偏高的地应力场，研究结果为坝区边坡开挖及长期稳定性分析提供了重要依据。

Academic reference work has its own features, as compared with work in other types of libraries. The academic reference work in libraries of higher institutions is characterized by the strong specialty orientation, multi layer and multi stage, introductiveness and academicism.

高校图书馆的参考咨询工作的特点与其他类型图书馆相比，主要体现在其专业针对性强、层次多、分阶段以及引导性和学术性等方面。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。