共查询到20条相似文献，搜索用时 391 毫秒
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沈镇芳 《成都信息工程学院学报》1988,(2)
本文针对各种现代通信技术,包括综合业务数字网、光纤通信、卫星通信、高速传真、微波接力通信、HF/UHF移动通信以及短波通信等的发展动向和进展情况作了简要介绍,并进行了分析和评论,对加速气象通信现代化提出了对策。 相似文献
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《成都信息工程学院学报》1992,(3)
该传真终端设备能通过综合业务数字网(ISDN),高质量地传送电子静止摄像机拍摄的图片和高清晰度图片。所有传真图像处理都是数字控制。 该传真终端能从具有数字公共电话的任意的地方传送图片,便携式,重量仅3公斤。它用 相似文献
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“完善体制、提高素质”活动开展以来，大庆市国土资源局认真剖析了干部队伍素质存在的问题，有针对性地深入开展教育培训，健高了职工的业务能力和综合素质。 相似文献
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Token Bos经过适当修改和发展可以移植到以太网上，再通过对硬实时协议栈RTCC的改造，可以将两种协议融合为一种基于以太网技术的具有传输硬实时、软实时和非实时数据功能的综合业务网络访问控制技术（ISE），即可在一套系统中同时实现传统网络业务和硬实时数据传输业务。 相似文献
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本文扼要地介绍了近两年来全球性国际通信学术会议动态以及我国电信科学技术和工程建设的进展情况,研讨了我国气象通信建设的发展趋势,供各界参考。 相似文献
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11月3日,杭州市国土资源局举行了一次别开生面的会议——公布首批26名被业务带教人员期满考核成绩,部署第二批13名学员的业务带教工作。其中首批业务带教学员有24名通过综合考核,2名学员因考核不达标,不能"出师"而被延长带教半年。杭州市国土资源局这种业务骨干带教新员工的方式,首创党政机关干部"传帮带"培训方式。近年以来,杭州市国土资源部门依托课堂教育平台开展干部培训的同时,通过开展业务带教、业务知识竞赛、编印业务知识手册等形式,创新干部培训方式,增强干部培训针对 相似文献
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耕地数据存在于国土资源管理工作的各个环节,理清耕地数据在各土地管理业务中的关系,对耕地数据的管理尤为重要。本研究对耕地数据在国土资源管理工作各个环节的范围、数据采集方式、地类认定情况、比例尺、更新频度等进行综合分析,理清其内在联系与差异,提出如何规范耕地数据在各土地管理业务中的应用的相关政策建议。 相似文献
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The ability of cell to modulate the fluidity of plasma membrane was crucial to the survival of microorganism at low temperature. Plasma membrane proteins, fatty acids and carotenoids profiles of Antarctic psychrophilc yeast Rhodotorula sp. NJ298 were investigated at -3 ℃, 0 ℃ and 8 ℃. The results showed that plasma membrane protein content was greater at -3 ℃ than that at 8 ℃, and a unique membrane polypeptide composition with an apparent molecular mass of 94.7 kDa was newly synthesized with SDS-PAGE analysis; GC analysis showed that the main changes of fatty acids were the percentage of unsaturated fatty acids (C18∶ 1 and C18∶ 2) and shorter chain saturated fatty acid (C10∶ 0) increased along with the decrease of the culture temperature from 8 ℃ to -3 ℃; HPLC analysis indicated that astaxanthin was the major functional carotenoids of the plasma membrane, percentage of which increased from 54.6±1.5% at 8 ℃ to 81.9±2.1% at -3 ℃. However the fluidity of plasma membrane which was determined by measuring fluorescence anisotropy was similar at -3 ℃, 0 ℃ and 8 ℃. Hence these changes in plasma membrane's characteristics were involved in the cellular cold-adaptation by which NJ298 could maintain normal plasma membrane fluidity at near-freezing temperature. 相似文献
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《极地研究(英文版)》2014,(4)
正1 Aims and Scope Advances in Polar Science(APS)is an international,peer-reviewed journal jointly sponsored by the Polar Research Institute of China and the Chinese Arctic and Antarctic Administration.APS is a comprehensive academic journal dedicated to presentation of multi-disciplinary achievements in Arctic and Antarctic expeditions and research.Its primary purpose 相似文献
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《中国海洋大学学报(英文版)》2014,(4)
<正>Copyright Submfnion of a roanusatpt inks:that the work described has not been published before(exoept In the form of an abstrW or as part of a published lecture,review,or thesis);that it is not under consideration for publication elsewhere that its publication has been approved by ail 相似文献
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《中国海洋大学学报(英文版)》2014,(6)
<正>The Journal of Ocean University of China(Oceanic and Coastal Sea Research)is a comprehensive academic quarterly sponsored by the Ocean University of China,published one volume per year.This journal is devoted to the publication of the theoretical and applied research results on oceanography and marine fisheries.The fieldcovered include the physical,chemical,biological,geo- 相似文献
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Massimo GRECO 《山地科学学报》2014,(6):1383-1384
<正>The 35th IAHR World Congress was held in Chengdu,China from September 8 to September 132013.The title of the conference was:"The Wise Finds Pleasure in Water:Meandering through Water Science and Engineering".During the congress,1239 papers were presented in 139sessions for oral presentations and 7 sessions for poster presentations.After the Congress,a Committee was appointed to select some of the best papers presented at the Congress for publication,after a 相似文献
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As an important component of the cryosphere,sea ice is very sensitive to the climate change.The study of the sea ice physics needs accurate sea ice thickness.This paper presents an electromagnetic-induction(EM) technique which can be used to measure the sea ice thickness distribution efficiently,and the successful application in Bothnian Bay.Based on the electromagnetic field theory and the electrical properties of sea ice and seawater,EM technique can detect the distance between the instrument and the ice/water interface accurately,than the sea ice thickness is obtained.Contrastive analysis of the apparent conductivity data obtained by EM and the value of drill-hole at same positions allows a construction of a transformable formula of the apparent conductivity to sea ice thickness.The verification of the sea ice thickness calculated by this formula indicates that EM technique is able to get reliable sea ice thickness with average relative error of only 12%.The statistic of all ice thickness profiles shows that the level ice distribution in Bothnian Bay was 0.4-0.6 m. 相似文献
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Based on the hydrographic data in austral summer during the 22nd Antarctic Expedition of China(2005/2006),some features can be found about the northern margin of Emery ice shelf as follows.The heat content in the surface layer(0-50 m) at the eastern end and the western end of the ice-shelf margin is much higher than that at the middle.The upper mixing-layer depth and the seasonal thermocline depth at the middle of the ice-shelf northern margin are much shallower than those at the both ends.However there is much less difference between the middle and the ends in the bottom layer.The remote sensing photos show that the inhomogeneity in the surface-layer water is closely related to the spatial distribution of the floes and polynia in the area. 相似文献
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正Rapid changes of Arctic sea ice cover have been in the focus of the international climate research community in recent years.Quite a few of nations have completed a large number of related surveys and research projects in the Arctic Ocean.Up to now,China has performed six research cruises to the Arctic Ocean resulting in a significant volume of research output.Improved knowledge on the atmospheree-sea ice-ocean interactions in the Arctic is a 相似文献
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