岳西县改造中低产田初步尝试     

管叔其  张祎  查旵松  刘中柱 《山地学报》1993,(3)

岳西是典型的贫困山区县,由于低产土壤分布广,自然灾害频繁,物化投入少等原因导致粮食生产水平低,广大群众没有摆脱贫困。通过耕作制度改革,优化种植结构等措施,已取得显著效果。对于山区低温冷害类型和生理机制等方面研究,也取得较大进展,同时也闯出一条具有山区特色发展高效农业的路子。  相似文献   

谈重震联合反演问题   总被引：7，自引：0，他引：7  

关小平  黄嘉正 《物探与化探》1994,18(6):431-439

本文指出传统的重震联合反演中存在的问题,并建议充分利用地震资料作为形体参数进行分场,对分离出的目的层位的重力效应再利用Parker公式进行反演,以求出那些较深的或没有可靠地震资料的界面。  相似文献   

鄂东阳逻地区早更新世砾石层研究   总被引：5，自引：0，他引：5       下载免费PDF全文

黄宁生  关康年 《地球科学》1993,18(5):589-596

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江汉平原北缘云梦组的时代及成因探讨     

关康年  鄢志武 《地球科学》1990,15(5):501-504

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ODD AND EVEN SYMMETRY OF ATMOSPHERIC CIRCULATION-THEORETICAL BASIS AND CLIMATIC CHARACTERISTICS^*          下载免费PDF全文

Guan Zhaoyong  Xu Jianjun  Wang Panxing 《Acta Meteorologica Sinica》1994,8(2):187-194

Analysis is done of the distribution of odd and even symmetric components of circulations on a global basis in terms of observations and technique for the odd/even symmetry,indicating that climatic features of the component patterns and their temporal evolution are able to reveal their influence of land-sea discrepancy in the Northern and Southern Hemispheres,the time scale of atmospheric response to radiation heating,circulation waveform structure and seasonal adjustment of global circulation.  相似文献   

用积云对流方法计算MCC的降水     

肖稳安  王喜红 《南京气象学院学报》1994,17(2):219-224

根据郭晓岚的对流加热方法，计算积云对流对ＭＣＣ和加热，增湿的贡献，估计其降水效率，从而推算ＭＣＣ的降水量，计算结果与实际降水量及降水分布比较接近，可用于ＭＣＣ６－１２ｈ的降水估计和预报。  相似文献   

THE APPLICATION OF GIS IN URBAN PLANNING:ENVIRONMENTAL ZONING STUDY IN THE OLD CITY OF WENZHOU,CHINA   总被引：1，自引：0，他引：1  

Guan Falan 《地理学报(英文版)》1994,(Z2)

I.Intr0ducti0nl.Backgr0undWenzhouisoneofthemostraPidlydevelopingcitiesinsouthernpart0fChina.Theoldcity0fWenzhou,whichhasahistoryofl600years,islocatedinthenorthernpart0fthecityalongOujiangRjver.Itc0versanareaofabout892hectares,including1lneighbourhoodswitl1atotalPOpulation0f340,959(l988).ItisoneofthehighlypoPlatedareasinChinawithaPOpulationdensity0f38,220peOPlePersquarekilometre.TheoldcityofWenzhouistl1ecommercialcentreofthenewWenzhoucity.Allldndsofactivitiesarelocatedonthelimitedlandwi…  相似文献   

Glacigenic Characteristics of the Luoquan Formation and Sediment Gravity Flow Reworking on It     

Wu Ruitang  Guan Baode 《《地质学报》英文版》1988,62(3):325-339

The origin of the Luoquan Formation which occurs along the southern margin of the North China Blockhas long been argued. Based on recent work. the Formation is considered as a glacial sedimentary sequencepartially reworked by sediment gravity flow. The major evidence for the glacigene of Luoquan Formationdiamictites is as follows: 1, a striated and polished pavement with various features resulting from glacialabrasion and plucking, such as crescentic gouge, crescentic fracture, streamlined form and glaciated step; 2.unsorted diamictites with striated clast. faceted clast and iron-shaped stone formed by glaciation; 3. rhythmitewith dropstones; 4. a glacial sedimentary sequence bearing advance-retreat cycles; and 5. wide distribution ofthe diamictites. Glacial deposits can be distinguished from sediment gravity flow deposits by the features men-tioned above. Some characteristics of sediment gravity flow existing in the Luoquan Formation diamictites in-dicate that glacial deposits might have been partially reworked by sediment gravity flow. Therefore, this papersuggests that the Luoquan Formation diamictite is a result of a glacial event rather than a mud flow deposit.The primary tillites are the principal contribution of the Luoquan Formation, while sediment gravity flow de-posits are the redeposited diamictites and should be termed as glacigenic sediment gravity flow deposits.  相似文献   

低频交流电法的试验和研究          下载免费PDF全文

桂燮泰  戴经安  关华平 《地震工程学报》1988,10(2):22-28

本文介绍了关于低频交流电法的试验和研究结果: (1) 现场观测证实,低频交流电法与直流电法观测的电阻率数据(包括ρ,曲线变化)是同步的和相近的。(2) 交流电法的抗干扰(噪声)能力比直流电法有所增强。采用交流电法守将干扰(噪声)背景由通常的100μv压低到10μv,並可以完全消除风扰。(3) 采用交流电法可以提高观测精度,其观测精度为10~(-3)(直流电法精度为10~(-2),还可有效地分辨1—2%的地电前兆异常。(4) 探测同样深度,交流电法可比直流电法功耗减少一倍。  相似文献   

On the Age of the Dongtang Formation in the Hengyang Basin of Hunan and the Cretaceous and Tertiary Boundary     

Guan Shaozeng 《《地质学报》英文版》1989,63(3):281-296

Since the coexistence of the Cretaceous and Palaeocene was ascertained in the Hengyang Basin of Hunan in the middle of the 1960's, the Cretaceous and Tertiary boundary has been discussed in several papers, but it still remains controversal. The points at issue are the connotation, stratigraphical position and lateral correlation of the Dongtang (or Chejiang) Formation.  相似文献