查询词典 earth science

Digital earth, emerged at the end of last century, is a new strategic orientation for quantitatively studying the earth and a crosscutting multidisciplinary field of space science and technology, information science and technology, earth science etc.

数字地球是20世纪末期问世的定量化研究地球的一个新的战略方向，是集空间科技、信息科技、地球科学等于一体的交叉学科领域。

Our country firstly put forward such design principle of Qinghai-Tibet railway engineering as "lower temperature actively, reduce the heat into the subsoil, and assure the heat stability of frozen earth for the quality stability of construction", creatively adopt such corresponding measures of frozen earth construction problem as: for the poor frozen earth developing section, line should avoid as possible;for the geology of ice at high temperature and unstable frozen earth zone, the method of bridge instead of subgrade shall be adopted;in subgradeconstruction, such facilities as heat stick, rubble ventilation subgrade , rubble ventilation berm, ventilation pipe subgrade and laying heat preservation board etc shall be adopted to raise the stability of frozen earth subgrade;during the excavation of bridge, culvert , foundation pit and scouring prevention trough, creatively adopt single-tooth knapper and solve the problem of frozen earth excavation;during the construction of bridge and culvert, durable concrete and three-step maintenance method are adopted to assure the outside and inside beauty of structure.

我国在世界上首次提出"主动降温、减少传入地基土的热量、保证多年冻土的热稳定性，从而保证修筑在上面的工程质量的稳定性"的青藏铁路工程设计原则，创造性地采取了解决冻土施工难题的相应对策：对于不良冻土现象发育地段、线路尽量绕避；对于高温极不稳定冻土区的高含冰量地质，采取"以桥代路"的办法；在路基施工中采用了热棒、片石通风路基、片石通风护道、通风管路基、铺设保温板等多项设施，提高冻土路基的稳定性；在桥涵基坑、挡水埝基槽开挖中，创造性地应用了单齿破碎器，解决了冻土开挖难题；在桥涵工程施工中，采用了耐久性混凝土，采用了三步养生法，保证了结构物内实外美。

The characterization of rare earth compound powders,such as rare earth hydroxides,rare earth carbonates,rare earth oxalates and rare earth oxides,are important to the synthesis of rare earth new materials.

稀土粉体(氢氧化稀土、稀土碳酸盐、稀土草酸盐、稀土氧化物和氟化物等)的颗粒性能方面的指标对稀土新材料的开发具有重要意义。

Organic matter, pH, cation exchange capacity and contents of potassium, sodium, magnesium, copper, zinc, manganese, cobalt, iron, selenium, iodin and fluorin were determined of rock and soil samples from six main geological background areas within the main ruminant production base, in Yunnan Province, China. Results showed: 1 the red earth area of Paleozoic basalt and red earth area of carbonate the highest; the yellow-red earth area of mixture of carbonate, clasolite and basalt follows, except for its content of Co, which is relatively lower; and the purple earth area of Mesozoic clasolite, the yellow-red earth area of clasolite and the dark red earth area of Precambrian metamorphite are the lowest

对云南省反刍动物生产基地所属的6个主要地质背景区的土壤和岩石样品的K、Na、Mg、Cu、Zn、Mn、Co、Fe、Se、I和F元素及土壤的有机质、阳离子交换量和pH进行测定分析，结果表明：晚古生代玄武岩红壤区和碳酸岩盐红壤区土壤各种矿质元素都比较高，有机质含量与CEC都较高，特别是Ⅴ区最为显著；碳酸岩盐、碎屑岩和玄武岩混合型黄红壤区除了Co含量较低外，其他元素含量都居中等或偏上水平，有机质含量与CEC仅次于第1类背景区；碎屑岩紫色土区、变质岩赤红壤区和碎屑岩黄红壤区大多数矿质养分相对都比较低，有机质含量与CEC最低。

In recent years, consolidation in the development of the medical profession, and strive to improve the quality of teaching at the same time, the additional population science, biological science, computer science, environmental science, foreign languages, materials science, and other non-medical professionals to make the College to maintain and carry forward Medicine, radiology, nursing, pharmacy characteristics at the same time, to the multi-disciplinary, comprehensive, modern and the University of direction.

近年来，在巩固发展医科专业，努力提高教学质量的同时，增设了人口科学、生物科学、计算机科学、环境科学、外语、材料科学等多个非医药专业，使学院在保持和发扬医学、放射、护理、药学特色的同时，向多学科、综合性、现代化大学方向发展。

Establish " traffic serves at the society, science and technology serves at traffic " science and technology develops a concept, specific science and technology develops a stress, dominant of government of; of strategy of executive classification research and development and market are advanced develop simultaneously, platform of science and technology of have the aid of, the conformity that realizes resource of of all kinds scientific research and optimize configuration; to protect intellectual property, quicken achievement of science and technology to change, ensure highway canalage traffic spans newly finally the implementation of type development target.

树立"交通服务于社会，科技服务于交通"的科技发展理念，明确科技发展重点，实施分类研发战略；政府主导和市场推进并举，借助科技平台，实现各类科研资源的整合和优化配置；保护知识产权，加速科技成果转化，最终确保公路水路交通新的跨越式发展目标的实现。

Science Alive is jointly organised by the British Council, the Education Bureau and the Hong Kong Science Museum, and sponsored by the Croucher Foundation. Every year, Science Alive invites leading UK academics and communicators in the field of science to present lectures and workshops to students and teachers in Hong Kong. The programme, which receives a huge level of support from schools throughout Hong Kong, delivers lively and provocative events which promote a wider understanding of science.

活动简介「活的科学」由英国文化协会、教育局及香港科学馆合办，裘槎基金会赞助的科学教育活动系列，每年均邀请来自英国的杰出学者和科普工作者为本地学生与教师举行讲座及工作坊，透过令人印象深刻的实验示范及互动学习模式，以轻松有趣的方法介绍科学知识，深受学界支持。

The article clarified above all economic progress and the common meaning that science and technology progresses, pointed out science and technology regards the first productivity as the profound influence to contemporary socioeconomy; Next, to science and technology progress and the main concern that economy grows made a specification, the main at 4 o'clock effect that discussed science and technology to progress to develop to economy and 10 characteristics that stimulative economy grows; Discussed adequately how to use science and technology to progress to develop the dynamic question with bigger infuse for economy better.

文章首先阐明了经济发展与科技进步的一般含义，指出了科技作为第一生产力对当代社会经济的深刻影响；其次，对科技进步与经济发展的基本关系作了说明，论述了科技进步对经济发展的四点基本作用和促进经济发展的十个特点；充分讨论了如何更好地利用科技进步为经济发展注入更大的动力的问题。

Comprehensive resource science can be furtherdivided into seven subdisciplines,similarly,departmentalresource science can be further divided intonine subdisciplines;as the pandect and application in specific area of resource science,academic resource science and regional resource science can be further divided respectively.A 3d-network system model of the discipline development on resource sciences is put forward.

资源科学的学科体系与分支学科主要包括理论资源学、综合资源学、部门资源学与区域资源学，其中，综合资源学可以续分为7个资源学科，部门资源学可以续分为9个资源学科；理论资源学作为资源科学通论，区域资源学作为资源科学在具体区域的实际应用，都可做出进一步续分；由此提出了资源科学学科体系发展的三维结构网络模式。

Natural science will in time subsume under itself the science of man, just as the science of man will subsume under itself natural science: there will be one science

自然科学将及时地把人的科学包容到自身，正如人的科学将及时把自然科学包容到自身：将会有一种科学2。

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。