查询词典 density

Department of Scientific History and Archaeometry; Graduate University of Chinese Academy of Sciences; Beijing 100049;4.Institute of Archaeology; Chinese Academy of Social Sciences; Beijing 100710; China;The fabrication technologies in terms of phase composition,structure,firing temperature,porosity,density and water permeability of ceramic water pipes and contrastive ceramic tilesexcavated from Anyang Yin Ruins of Shang dynasty were studied by X-ray fluorescence,X-ray diffraction and dilatometer,respectively.It was found that the contents of CaO,K2O,MgO and P2O5 in CWP were relatively higher than those in contrastive CT.The difference was further confirmed by the mass ratio of flux...

采用X射线荧光、X射线衍射、热膨胀等分析手段对比研究了安阳商代陶水管的制作工艺，发现陶水管化学成分中各类熔剂的质量分数均略高于对比陶片中熔剂的质量分数，CaO、K2O、MgO等助熔剂与A l2O3的质量比进一步证实该现象，而这种差异性则外在地表现为陶水管的气孔度低于对比陶片以及陶水管热膨胀曲线中出现玻璃化现象，该结果表明陶水管原料应为一种易熔粘土，或者在沉淀粘土中人为地掺和了草木灰类掺和料，这有利于陶水管烧制与成型，有助于熔剂在熔融状态下，较好地进入陶水管中的空隙，使陶水管变得更加致密，一定程度上有利于防止陶水管的渗水，显示出陶水管制作工艺的特殊性。

In this paper, the multivariate archimedean copula is used to analyze the asymmetric dependence structure among financial asset returns, whose marginal processes are captured by nonparametric kernel density estimation.

在研究金融资产的组合风险分析中，描述多个金融资产间的相关结构是选择最优组合权重的关键因素之一，如何准确地刻画金融资产间的非对称尾部相关结构，在定量研究组合资产的风险分析中尤其重要。

The apparent density and ash ratio of the bone samples were measured according to the Archimedes' principle.

取胫骨上端骨标本，拍摄完整骨和松质骨块的X光片，做X光片的微机图象分析测量骨端平均相对矿物质密度和不同部位的相对矿物质密度。

The density of the material was measured by Archimedes method.

同时用阿基米德法测量了材料的密度。

Porosity logging methods examining gas reservoirs of sandstone and argillaceous sandstone through acoustic wave and density are effectively used in coal beds.

煤田中在煤层附近有煤层气砂岩储层、泥质砂岩储层的存在，声波、密度两种孔隙度测井是进行孔隙度探测的有效方法。

Seen from the survey time, the density indices of Anopheles and Culex are lower after October, but higher before June. As a consequence, this survey should start in Aril and May, and stop in early November.

从调查的时间看，按蚊和库蚊在10月份以后密度指数较低，而在6月份以前较高，对于按蚊和库蚊启动调查的时间应在4、5月份，而调查结束的时间可以确定在11月初。

Low density lipoprotein. This is often known as bad cholesterol and is thought to promote arterial disease.

低密度脂蛋白，这是常常被称为坏cholesterol 和被认为是促进动脉疾病。

High density lipoprotein. This is often referred to as 'good cholesterol', and may oppose arterial disease.

高密度脂蛋白，这是常常被称为'好的胆固醇'，并有可能反对动脉疾病。

Objective To investigate the role of endothelial injury induced by oxidized low density lipoprotein in the pathogenesis of arteriosclerotic obliteration in vivo.

目的 探讨脂质过氧化物致EC损害与动脉硬化性闭塞症发病的关系及循环内皮细胞、OX-LDL检测的临床价值。

Smoking\ Arteriosclerotic cerebral infarction\ Apolipoprotein\ High density lipoprotein cholesterol

吸烟；动脉硬化性脑梗塞；载脂蛋白；高密度脂蛋白胆固醇

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了