【摘 要】
:
水位观讀得准确与否,对水文資料有十分密切的关系。河面一遇有風或漲水时洪峯波浪触及水尺,就感到观讀水位有些困难,甚至發生很大誤差。經在石門
Accurately read the wate
论文部分内容阅读
水位观讀得准确与否,对水文資料有十分密切的关系。河面一遇有風或漲水时洪峯波浪触及水尺,就感到观讀水位有些困难,甚至發生很大誤差。經在石門
Accurately read the water level or not, the hydrological data are very closely related. When a peak or a river rises and the flood waves touch the water level, there is some difficulty in reading the water level, or even a great error occurs. After the stone door
其他文献
D-Deoxyribose, the basic structure unit of DNA, and its antipode L-deoxyribose were concisely synthesized from easily available D- and L-glyceralaldehydes using
进入3、4月份,国内农业生产、交通运输活动显著增加,各地成品油市场陆续进入需求旺季,各地普遍出现汽柴油资源趋紧,价格上扬的局面。
In March and April, the domestic ag
(单位:亿m“) 国家或地区西半球阿根廷玻利维亚巴西加拿大智利哥伦比亚厄瓜多尔墨西哥秘鲁特立尼达和多巴哥美国委内瑞拉’其它拉丁美洲国家西欧奥地利丹麦法国德国意大利荷
气缸垫的技术要求很高,主要是密封性能要好。气缸垫长期处于苛刻的环境中工作,若安装缸垫时一不注意,就会产生冲缸,造成发动机故障。根据实践经验所掌握在行车途中发生冲缸
The recovery of Au by activated carbon fibers (ACFs) was carried out in a 40mm diameter, 1200mm height fluidized bed. The rates of reaction of the functional fi
Electron transfer reaction between a simplified model molecule of α amino carbon centered radical and O 2 has been studied with ab initio calculatio
在全球汽车制造业及美国的政府机构(NHATSA)的共同努力下,已经认可汽车安全气囊与安全带一起使用时,汽车发生前碰撞时对拯救乘员生命方面是有效的。在过去的几年中,安全气囊
Intermetallic compounds of AB 5 type are promising materials for M-H batteries. In this report we present the results about the influence of quality of interme
基于广东省韶关市抽样调查样本数据,对集体林权改革后农户林业经营模式的选择行为影响因素进行分析,利用Logistic模型对农户选择行为与各个自变量进行了回归。认为农户家庭的
We synthesized optically active 2-(8′-diphenylphosphino-1′-naphthyl)oxazoline ligands by palladium-catalyzed coupling reactions of (trimethylsilyl)diphenylpho