对包头市九原区温室大棚蔬菜的一些思考     

隋剑利 《内蒙古气象》2014,(6):34-36

文章基于1980—2009年包头市九原区气温和降水数据,分析了温室大棚在此区域的适应性、必要性和作物效益。同时,针对在温室生产过程中存在的问题,提出了应对措施,为包头市九原区温室大棚生产提供了参考。  相似文献   

GPS/INS����ϵ����н��ջ��Ӳģ     

甘雨  隋立芬  肖国锐  段宇  戚国宾 《大地测量与地球动力学》2014,34(3):129-132

??????ù???????????????????????????Allan??????????????????????????????????????·???????????????е???????????????????--?????????????????-????????????????????????????GPS/INS????????????У???????-???????????????????????????????????????????????????????????????????仯??  相似文献   

黄河流域A级旅游景区空间格局及其影响因素的多尺度分析北大核心CSCD     

张宇硕  沈雪瑞  眭任静  鲍捷  喻忠磊  赵林  张学斌 《中国沙漠》2022,42(6):103-115

旅游景区合理布局是实现黄河流域旅游业高质量发展的内在要求与根本保障,识别景区空间格局及其影响因素如何随尺度发生变化,对黄河流域的景区多层级统筹管理具有重要现实意义。基于地理因素的空间尺度效应,从县域、市域、集聚区3个尺度构建了分析框架,利用统计与GIS技术揭示黄河流域A级景区多尺度空间格局,运用地理探测器、空间叠加分析等揭示各尺度影响因素及其差异特征。结果表明:(1)黄河流域A级景区整体呈东部和南部密集、西部和北部稀疏的空间格局,流域南部形成一个中高密度弧形带。随着研究尺度增大,景区集聚范围逐渐扩大,集聚程度逐渐降低;(2)县域尺度上,全国重点文物保护单位密度对景区格局影响程度最大,其次是植被覆盖度、年降水量、到最近河流距离、国家湿地公园密度。人口密度是市域尺度影响程度最大的主导因素,非主导因素在与各主导因素交互后形成强烈的增强效应。集聚区尺度景区格局主要受年降水量、植被覆盖度等自然环境因素的刚性约束;(3)3个尺度的影响因素明显不同,不同尺度景区格局并不是主导因子简单组合或累积的结果,而是自然环境、旅游资源、社会经济及区位复杂交互后的产物。  相似文献   

实时GPS水汽探测技术中的电离层延迟订正     

王威  隋立芬  符养  黄贤源 《气象科技》2007,35(3):411-413

在水汽监测网中,利用精密预报星历得到的结果与精密星历的结果相差很小,因此可以采用精密预报星历进行实时的水汽探测。由于电离层延迟对水汽影响较大,因此必须加以消除。详细地介绍了Klobuchar模型、双频观测值求解电离层延迟和双频观测值线性组合无电离层延迟3种方法的推导过程。将3种方法消除电离层延迟的影响大小作一比较,认为双频观测值线性组合无电离层延迟是最好的方法。  相似文献   

Feeding ecology of Japanese Spanish mackerel(Scomberomorus niphonius) along the eastern coastal waters of China     

Haozhi Sui  Ying Xue  Yunkai Li  Binduo Xu  Chongliang Zhang  Yiping Ren 《海洋学报(英文版)》2021,40(8):98-107

Feeding activities provide necessary nutrition and energy to support the reproduction and development of fish populations. The feeding ecology and dietary plasticity of fish are important factors determining their recruitment and population dynamics. As a top predator, Japanese Spanish mackerel(Scomberomorus niphonius) supports one of the most valuable fisheries in China. In this study, the feeding ecology and diet composition of Japanese Spanish mackerel spawning groups were analysed based on samples collected from six spawning grounds along the eastern coastal waters of China during spring(March to May) in 2016 and 2017. Both stomach contents and stable isotope analysis were conducted. Stomach content analysis showed that spawning groups of Japanese Spanish mackerel mainly fed on fish, consuming more than 40 different prey species. Diets were significantly different among sampling locations. The most important prey species were Stolephorus in Fuzhou, Japanese anchovy Engraulis japonicus in Xiangshan, Euphausia pacifica in Lüsi, sand lance Ammodytes personatus in Qingdao and Weihai, and Leptochela gracilis in Laizhou Bay. Stable isotope analysis showed that the trophic level of Japanese Spanish mackerel was relatively high and generally increased with latitude from south to north. In the 1980 s, the diet of Japanese Spanish mackerel was dominated solely by Japanese anchovies in the eastern coastal waters of China. The results in the present study showed that the importance of Japanese anchovies declined considerably, and this fish was not the most dominant diet in most of the investigated waters. Both the spatial variations in diet composition and changes in the dominant diet over the long term indicated the high adaptability of Japanese Spanish mackerel to the environment. Combining the results of stomach analysis and stable isotope analysis from different tissues provided more comprehensive and accurate dietary information on Japanese Spanish mackerel. The study provides essential information about the feeding ecology of Japanese Spanish mackerel and will benefit the management of its populations in the future.  相似文献   

华南南华纪武陵锰矿成矿带松桃李家湾-高地-道坨地堑盆地研究新进展和潜力预测     

沈红钱  张遂  曾飞  谢小峰  杨炳南  谢兴友  蔡国荣  沈小庆  朱璞  姚希财  吴应值  杨俊 《贵州地质》2021,38(2):129-138

华南南华纪武陵锰矿成矿带松桃李家湾-高地-道坨地堑盆地控制形成了系列著名的大型-超大型锰矿床.本文依托2020—2021年实施的贵州松桃高地超大型锰矿床大精查(勘探)项目最新成果,运用锰矿气液喷溢沉积成矿理论与隐伏锰矿找矿预测技术体系,对该地堑中的含锰岩系、(富)锰矿体厚度、矿石品位等变化规律及气液喷溢矿石相特征进行综...  相似文献   

黔渝毗邻区杨家湾-老木湾南华纪含锰地堑特征与找矿预测     

沈红钱  张遂  谢小峰  袁良军  杨炳南  朱璞  谢兴友  郑超  张平壹  张仁彪  姚希财 《贵州地质》2021,38(1):1-7

黔渝毗邻区杨家湾-老木湾南华纪含锰地堑系南华裂谷盆地(I级)中的武陵次级裂谷盆地(Ⅱ级)、松桃—古丈次级地堑盆地(Ⅲ级)中的众多Ⅳ级含锰地堑之一.运用锰矿裂谷气液流体喷溢沉积成矿理论与找矿预测模型,对该含锰地堑中的含锰岩系、锰矿体厚度等变化规律进行综合研究,圈定了杨家湾-老木湾IV级含锰地堑的空间分布范围.含锰地堑长轴...  相似文献