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李松林  赖晓玲  何加勇  田建华 《大地测量与地球动力学》2008,28(5):16-20

?????й???????????????????????????????????????????λ???????????????????????????????????????????ī?????????????????????????棬???????????????????????????????????????????????????????????????????????????????????Ч?????????????????????????????????????????????????????????????λ?????????????????????λ?????????????????????????????????????????????????????????????????????壬????????????????????????????д???  相似文献   

�봨������ƽͨ��ϲ�Χ�ݲ�̽��   总被引：4，自引：1，他引：3  

赖晓玲  李松林 《大地测量与地球动力学》2008,28(6):6-10

????λ????8.0???????????, ??????????????????Χ?????????????????????????е???NW??SE??????????????????400 m?????????????????8.0???????????????п????????Χ??????????????????????????????????н???????ò?????????Χ?????????????3~4 Hz???????????????Χ??????????????????ε???????????200????????????Щ???????????????????????磬?????β???????????S???????λ?????????????????????????λ???????????????λ??????  相似文献   

ADS辅助实现线极化到圆极化的转换     

CHEN Songlin 《中国科学院上海天文台年刊》2005,(1):103-109

给出C波段双圆极化低噪声接收机中圆极化输出的实现方案,研究了利用90°电桥进行线- 圆极化转换时两个线极化通道增益及相位的平衡度对圆极化隔离的影响。分析了如何通过调节一对同轴电缆的长度差来补偿相位不平衡,并借助ADS软件计算了该长度差,实现了线-圆极化转换,取得接收机两个圆极化之间的隔离度好于20dB的效果。  相似文献   

松辽盆地钱家店地区姚家组砂岩黏土矿物特征及其与铀矿化的关系          下载免费PDF全文

单芝波  雷安贵  宋柏荣  奥琮  杨松林  韩洪斗 《中国地质》2022,49(1):271-283

[研究目的]钱家店铀矿床位于松辽盆地西南部,含铀岩系为上白垩统姚家组.目的层中含有大量的黏土矿物,因此揭示姚家组砂岩黏土矿物特征,对铀的成矿作用探讨至关重要.[研究方法]本文通过系统的显微镜下鉴定、扫描电镜、X射线衍射等分析测试手段,对钱家店地区姚家组砂岩黏土矿物的镜下特征、成分及含量进行了系统的观察和研究.[研究结果...  相似文献   

牙鲆选育F3代家系的建立及遗传效应分析     

田永胜  陈红林  齐文山  姜静  张英平  刘万军  李宝玉  刘寿堂  孙德强  陈松林 《海洋学报》2015,37(4):40-51

牙鲆是太平洋西岸海水养殖、捕捞和自然增殖的主要鱼类,但是人工养殖病害多、生长慢,针对这一问题,从2003年开始开展了牙鲆选择育种。本文利用筛选和培育的F1、F2代牙鲆家系核心群体,构建了F3代家系52个,在生长到196d时,对家系1 560尾鱼苗全长、体宽、体质量、全长日增量和体重日增量5个生长性状进行测量和计算,获得7 800个数据。采用"加性-显性"线性模型、最小范数二阶无偏估计法(MINQUE)对以上生长性状的边际平均值、加性方差分量、显性方差分量、随机方差分量、狭义遗传力、广义遗传力、亲本加性效应、杂交随机效应等遗传参数进行了评估。结果显示:1202、1206、1226和1211家系以上生长性状的边际平均值同时显著高于其他家系。以上5个生长性状的加性方差分量比率为(0.099±0.01)~(0.24±0.02),显性方差分量比率(0.30±0.02)~(0.31±0.02),随机方差分量比率(0.48±0.02)~(0.61±0.01),5个性状狭义遗传力0.099~0.24,广义遗传力0.38~0.54,以上遗传参数均达极显著性水平(P0.01)。综合比较18个亲本5个性状的加性效应预测值,发现F0917、F0908、F0905、F0915、F09125和KS(韩国牙鲆)亲本在5个性状上都具有极显著的正向效应(P0.01),其他亲本5个性状都不同程度的表现为显著(P0.05)或极显著(P0.01)的负向加性效应。对42个杂交组合显性随机效应进行预测,D(2×6)、D(2×18)、D(3×4)、D(7×12)、D(7×14)和D(8×13)6个杂交组合在5个性状上都表现为极显著(P0.05)正效应,利用这些杂交组合建立家系将促进牙鲆以上5个性状的生长。本文研究结果,为牙鲆优良家系的建立及新品种的培育初步筛选出了性状优良的亲本、杂交组合和家系,同时为牙鲆进一步选择育种提供了理论和技术依据。  相似文献   

新疆东准噶尔斑岩铜矿主要构造类型   总被引：5，自引：0，他引：5  

屈迅  徐兴旺  董连慧  梁广林  邓刚  周刚  陈松林  张连昌  杜世俊  张永  蔡新平 《新疆地质》2010,28(1)

东准噶尔地区分布有索尔库都克、哈腊苏-卡拉先格尔、乌伦布拉克-溴水泉、塔黑尔巴斯套与琼河坝5条斑岩铜矿带,分为构造叠加改造型斑岩铜矿、断裂构造背景下的斑岩铜矿与和尔赛型斑岩铜矿3种构造类型.构造叠加改造型斑岩铜矿受后期韧性变形构造改造、硫化物沿片理带富集,黄铜矿细脉主要分布于片理带中相对较弱的破劈理中,铜矿体总体产状与片理带产状一致.断裂构造背景下的斑岩铜矿,含矿斑岩体呈岩枝状产出,矿化脉体及伴生蚀变与断裂构造关系密切.和尔赛型斑岩铜矿,具典型斑岩铜矿与岩浆融离型矿床的双重特征,是一个较特殊的斑岩铜矿.  相似文献   

Spatial decision support applications based on three-dimensional city models     

LIChaokui ZHUQing ZHANGYeting HUANGDuo ZHAOJie CHENSonglin 《地球空间信息科学学报》2004,7(2):135-143

The basic mathematic models, such as the statistic model, the time-serial model, the spatial dynamic model etc.,and some typical analysis methods based on 3DCM are proposed and discussed. A few typical spatial decision making methods integrating the spatial analysis and the basic mathematical models are also introduced, e.g. visual impact assessment, dispersion of noise immissions, base station plan for wireless communication. In addition, a new idea of expectation of further applications and add-in-value service of 3DCM is promoted. As an example, the sunshine analysis is studied and some helpful conclusions are drawn.  相似文献   

Wave propagation analysis of porous rocks with the thermal activated relaxation mechanism     

Daoying Xi  Songlin Xu  Yun Du  Liangkun Yi 《Journal of Applied Geophysics》2011,73(3):289-303

Wave attenuation and phase velocity dispersion in the temperature domain are more complicated than those in the frequency domain. To describe wave propagation properties in the temperature domain, a so-called thermal activation mechanism model is built on the experimental result that increasing the temperature or decreasing frequency could obtain similar results on the attenuation. A rheological model (the Zener model) is employed to describe viscoelastic attenuation in saturated porous rocks. The Arrhenius relation is introduced to describe the thermal activation mechanism. The wave propagation model with thermal effects in porous media is then obtained, and 1-D P-wave and S-wave propagation characteristics are analyzed in numeric process, respectively.Two attenuation mechanisms are found in this model, the Biot loss and the thermal activation relaxation. The thermal relaxation attenuation peak and the Biot attenuation peak are observed in both frequency and temperature spectra. These two peaks move towards each other when the temperature increases on frequency spectra. The thermal relaxation peak shifts towards higher frequencies while the Biot peak shifts towards lower frequencies. At some temperature, these two peaks will superpose. The combination of the thermal relaxation and the Biot loss leads to the complexity of wave velocity curves. Similar phenomena could be observed on temperature spectra. The thermal relaxation features may relate to a so-called “local heat transfer” mechanism. These two peaks in the temperature domain have been observed in the experiments by other investigators. The characteristics of velocity and attenuation are more remarkable for high porosity rock samples. The model is helpful for the understanding of wave propagation in the temperature domain.  相似文献   

Molecular cloning, characterization and expression analysis of Sox9a and Foxl2 genes in half-smooth tongue sole (Cynoglossussemilaevis)     

DONG Xiaoli  CHEN Songlin  JI Xiangshan  SHAO Changwei 《海洋学报(英文版)》2011,30(1):68-77

  相似文献   

山区沟域经济发展的空间结构GIS分析——以北京市门头沟区为例   总被引：1，自引：0，他引：1  

刘春腊  张义丰  曹俊  穆松林  贾大猛  兰婷婷 《地球信息科学学报》2011,13(2):189-197

沟域经济是山区发展的新模式,对其空间结构进行研究,可以为山区经济的空间优化和人口、产业布局提供参考,具有理论价值和指导意义.门头沟区位处北京市的山区,其沟域经济发展具有典型性.对此,运用ArcGIS、SPSS软件,采用DEM数据的高程、长度和坡度要素,提取了门头沟区的代表性沟域.在解读门头沟区沟域经济空间结构内涵的基础...  相似文献