上黑龙江盆地虎拉林金矿床黄铁矿LA-ICP-MS原位测试及其对矿床成因的制约     

巩鑫  魏小勇  赵元艺  刘春花  水新芳  杜蔺  宋小军  衮民汕  谭伟 《大地构造与成矿学》2021,45(4):745-760

位于上黑龙江盆地内的虎拉林金矿床为区域重要的金矿床之一,关于该矿床的成因一直存在较大的争议.为厘清虎拉林金矿床成矿物质来源及赋存状态,确定矿床成因及形成机制,作者运用LA-ICP-MS原位测试技术,分析了矿床中不同期次黄铁矿的元素组成.结果表明,该矿床存在PyI、PyII和PyIII三期黄铁矿,不同期次黄铁矿的微量元素...  相似文献   

基于地震探测的盐源盆地构造特征及动力学意义          下载免费PDF全文

张平川  于常青  瞿辰  邱隆君  李恒强 《地震学报》2021,43(5):569-583

基于覆盖盐源盆地的短周期天然地震台阵和布设的一条人工地震测线所获得的地震数据,从中提取地震能量属性,并通过地震层析成像获得该地区的浅部地震速度结构,继而对短周期地震台阵一个月的噪声数据进行互相关得到经验格林函数,再通过时频分析获得相速度频散曲线,反演获得不同深度的S波速度分布.研究结果显示,盐源盆地地震特征主要分为三层...  相似文献   

喀左日光温室内气温变化规律及其应用   总被引：6，自引：0，他引：6  

马成芝  孙立德  穆春华 《气象与环境学报》2007,23(5):49-52

根据2003年12月至2004年3月喀左日光温室大棚内气温连续监测的气象资料,对棚内气温变化规律及影响因子进行分析。结果表明:天空总云量、日照时数、3级以上的风力和降雪是影响棚内气温日变化的主要气象因子。日照时数是影响棚内气温月变化的主要气象因子。依据分析结果,在实际中可用于日光温室大棚气温预报,为棚户生产提供实用的气象信息。  相似文献   

2008年度大气科学领域项目评审与研究成果分析   总被引：3，自引：3，他引：0  

罗云峰  丹利  施春华  王小曼 《地球科学进展》2008,23(12):1324-1329

12008年项目申请、送审与资助情况2008年地球科学五处共受理各类项目706项。其中:面上项目356项,青年科学基金210项,地区科学基金22项,上述三类项目共588项;“天气与气候系统变化过程与机制”优先发展领域重点项目23项(其中大气学科22项),“全球变化及其区域响应”优先发展领域  相似文献   

A three-dimensional satellite retrieval method for atmospheric temperature and moisture profiles     

张蕾  邱崇践  黄建平 《大气科学进展》2008,25(5):897-904

A three-dimensional variational method is proposed to simultaneously retrieve the 3-D atmospheric temperature and moisture profiles from satellite radiance measurements. To include both vertical structure and the horizontal patterns of the atmospheric temperature and moisture, an EOF technique is used to decompose the temperature and moisture field in a 3-D space. A number of numerical simulations are conducted and they demonstrate that the 3-D method is less sensitive to the observation errors compared to the 1-D method. When the observation error is more than 2.0 K, to get the best results, the truncation number for the EOF＇s expansion have to be restricted to 2 in the 1-D method, while it can be set as large as 40 in a 3-D method. This results in the truncation error being reduced and the retrieval accuracy being improved in the 3-D method. Compared to the 1-D method, the rms errors of the 3-D method are reduced by 48% and 36% for the temperature and moisture retrievals, respectively. Using the real satellite measured brightness temperatures at 0557 UTC 31 July 2002, the temperature and moisture profiles are retrieved over a region （20°-45°N, 100°- 125°E） and compared with 37 collocated radiosonde observations. The results show that the retrieval accuracy with a 3-D method is significantly higher than those with the 1-D method.  相似文献   

The cytochemistry of oocytes of Chinese shrimpPenaeus orientalis     

Chen Qiu 《中国海洋湖沼学报》1991,9(2):106-114

In the growth of oocytes ofPenaeus orientalis Kishinouye, five stages were distinguished. Histochemical tests showed the presence of DNA in the chromatin and nucleolus of the cell. The cytoplasm at the previtellogenetic stage and the nucleolus are rich in RNA and the proteins abounding with cysteine, tyrosine and tryptophan. The yolk consists mainly of proteins and phospholipids. The 1,2-glycol groups of carbohydrate occur in the cytoplasm at stage II, and aggregate mostly into cortical rods at stages IV and V. Neutral lipid droplets, and protein containing disulfides, appear in the cytoplasm at stages III and IV respectively. The proteins in the cortical rod differ from those in other components of the cell in the presence of cystine and absence of arginine.  相似文献   

Petrological Research of K-Rich Volcanic Rocks from Wudalianchi and Nearby Areas     

Qiu Jiaxiang Liao Qun''''anChina University of Geosciences  Wuhan 《中国地质大学学报(英文版)》1992

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南极长城站云和气溶胶光学特性的遥感和分析          下载免费PDF全文

张金定  邱金桓  汪宏七 《极地研究》1991,3(1):47-53

本文根据光度计和半球辐射计观测的资料、分析了1988年12月至1989年2月南极长城站云和气溶胶光学厚度以及气溶胶的谱分布。结果表明,在长城站夏季,云和气溶胶的光学厚度都较大,其均值分别为12.7和0.094。  相似文献   

The IPS work in Beijing astronomical observatory     

Qiu Yuhai 《Astrophysics and Space Science》1996,243(1):255-258

This article describes the IPS work in the Beijing astronomical observatory including the hardware and software of the instrument and some theoretical research.The project is supported by the China National Nature Science Fundation under the program 49391400  相似文献   

SIMULTANEOUS DETERMINATION OF AEROSOL SIZE DISTRIBUTION AND REFRACTIVE INDEX AND SURFACE ALBEDO FROM RADIANCE-PART III: PARAMETRIZATION AND APPLICATION     

Qiu Jinhuan 《大气科学进展》1988,5(3):311-324

Based on the radiative transfer calculation results, three approximate expressions of the sky radiance in almucantar and its increment caused by surface albedo are presented. They are simple, but accurate enough. The dependence of the fitted aerosol scattering phase functions on refractive index is also studied, and its reasonable form is given. For Junge size distribution, the approximate equations of the phase functions with some special scattering angles are obtained. These approximate equations significantly simplify the retrieval algorithm of simultaneous determination of aerosol size distribution and its refractive index and surface albedo. This method can be realized with a microcomputer, and has been used to process and analyse the experimental data measured in Hefei of Anhui Province.  相似文献