查询词典 volume density

According to Biot-Savart law, the magnetic induction at the diameter position of the spin axis is calculated. Furthermore, using the internal and external radius of the Earth's outer core as well as the radius of the Earth and the magnetic induction at the Earth's magnetic pole, the volume charge density and surface charge density of the Earth's outer core have been obtained.

先根据毕奥-萨伐尔定律计算球形模型绕自转轴旋转时在自转轴直径上产生的磁感应强度；再利用已知的地球外核的内外半径及地球半径和磁极处的磁感应强度值，计算出地球外核的电荷体密度及面密度。

Boyle's law that the density of a gas is proportional to its pressure and Charles' law that the volume is proportional to the temperature, would be exact if gas molecules were points which had no volume and did not attract one another.

假如 气体没有量且彼此不相互吸引的话，玻意耳关于气体密度与压力成正比的定律以及查尔斯关于气体的量与温度成正比的定律就是正确的。

The data of forest inventory and stem analysis were used to build models about diameter breast-high, high of tree, volume of single timber, stand volume, and these models were correlative to age and stand density. The models were transforming into three-dimension graphs, and the stand growth processes were simulated to visual images.

利用林分调查和解析木数据建立了具有一定适应性的湿地松纸浆林胸径、树高、单株材积和林分蓄积模型，对生长模型进行了图形化表达，并对林分生长过程进行了可视化模拟再现。

To accelerate the widespread of Synchronous Chip Seal and improve the operation quality of Synchronous Chipsealer, key techniques which influence the operation quality is studied detailedly, including the control of distributing quality, the dynamics characteristics of hydraulic system and the spray characteristics of asphalt nozzle of Synchronous Chipsealer.1 The factors which influence Synchronous Chip Seal quality are studied. Fiducial probability of simultaneous distribution density is advised to be used in evaluating the distribution bias and standard deviation of asphalt and aggregates simultaneously, which is more advanced than the single index evaluation method used before.2 The volume efficiency formula of asphalt pump is revised after analyzing the data of volume efficiency with mathematical statistics, which is helpful to match the asphalt spray system and control the flow out of asphalt pump accurately. With equation deduction and experiment, dynamic of hydraulic system used in Synchronous Chipsealer is studied, which lay the theory foundation on improving the stability and efficiency from design and controlling.4 Simulation on hydraulic system used in Synchronous Chipsealer is done with AMESim; the results indicate that multi-circle parallel connected hydraulic system with constant pressure power is better than that with load-sensing pressure power at present, because the latter will oscillate when the multi circles work at the same time. This conclusion has been proved during the debug of Synchronous Chipsealer.5 Asphalt nozzle characteristics, such as flat jet shape, flow distribution, are studied with experiment, the results indicate that cross quality of asphalt distributing is not increased linearly follow the increase of fan overlap level, the best point usually exists between two whole overlap level, asphalt distributing quality is better than±4% at the 2.5 overlap level, meets the superior specified in standard; The distribution quality of Synchronous Chipsealer can be increased by spray asphalt of different flow rang with nozzle of different diameter

为了加快同步碎石封层技术的推广，提高同步碎石封层设备的作业质量，本文对同步碎石封层设备作业质量的影响因素与控制方法、液压系统的动力学特性和沥青喷嘴的喷洒特性等关键技术进行了深入细致的研究：1研究了影响同步碎石封层作业质量的因素，提出了采用联合密度分布置信概率对同步碎石封层中沥青洒布量和碎石撒布量的系统偏差和标准差指标进行综合评价的方法，克服了传统评价方法只能对单一指标进行评价的缺陷；2采用数理统计的方法，研究了沥青泵的容积效率特性，修正了沥青泵容积效率公式，为沥青喷洒系统的匹配和沥青泵出口流量的精确控制提供了依据；采用数理方程推导与试验相结合的方法，研究了同步碎石封层设备液压系统的动力学特性，为从设计和控制的角度提高同步碎石封层设备液压系统的稳定性和效率奠定了理论基础；3运用AMESim软件对采用负载敏感控制和恒压控制的两种同步碎石封层设备液压系统进行仿真，结果表明：负载敏感控制的并联液压系统在多回路同时工作时，由于液压泵排量控制参考压力不稳定，容易引发液压系统振荡，恒压控制的并联液压系统是目前技术条件下比较理想的同步碎石封层设备工作装置驱动方案；该结论亦通过同步碎石封层设备装机试验得到了验证。4采用试验的方法对沥青喷嘴的喷洒特性进行了研究，结果表明：沥青洒布的横向精度并不是随着喷洒扇面重叠度的增加线性增加，其最高点通常出现在二个重叠度之间的"半重叠位置"，"2.5重叠"洒布时，沥青的横向洒布精度≤±4%，可以达到国家相关标准中的优级标准；同步碎石封层设备还可以根据不同洒布量情况下的流量需求，采用不同通径的喷嘴进行喷洒，提高沥青洒布精度。

The steps of software development are: at first, link the database and auto-count the volume and the density of each encasement then sort descending the encasement according to the density.

软件的实现步骤为：首先连接数据库并据密度贪婪算法自动计算每件货物的体积、密度，然后将货物记录按密度降序排序。

Objective To observe the effects of pulsed electromagnetic field or/and exercise on the area bone mineral density and volume bone mineral density of rats with osteoporosis induced by tretinoin gastric perfusion.

目的探讨脉冲电磁场或运动对维甲酸形成的骨质疏松模型大鼠的面积骨密度和体积骨密度的影响。

The relationships of the loop length, stitch density and thickness of fabrics to yarn linear density were analyzed with the experiment data, and the fiber volume fraction of glass fiber plain knitted fabrics was estimated theoretically.

采用改变纱线根数的方法，利用横机编织了多种不同纱线线密度的玻璃纤维纬平针织物，并改变编织的弯纱深度，得到3种弯纱系列的试验用布20块。

The effect of pulp volume on the wear rate in lower pulp density is greater than that in higher pulp density.

矿浆浓度较低时，矿浆体积的变化对钢球磨损率的影响比矿浆浓度较高时的影响要显著。

The minerals of igneous formations were described and a bulk volume model based on mineral and including porosity was established. The logging response equations of density, apparent neutron porosity, acoustic travel time,gamma ray and volume photoelectric cross index were deduced. The volume content of four minerals in matrix was calculated. The igneous rocks were classified according to the international igneous classification scheme proposed by IUGS (International Union of Geological Society).

分析了火成岩中的矿物成分，并基于此建立了以矿物为基础并包含孔隙度的体积模型；建立了密度、视中子孔隙度、声波时差、伽马射线和体积光电吸收截面指数的测井响应方程，计算了岩石骨架中4种矿物的体积含量，依据国际地质科学联合会提出的火成岩矿物分类方案对火成岩进行了分类。

Author puts forward the statistical method of freeway transportation volume and taking Nanjing-Shanghai freeway as an example, firstly obtains the passenger traffic, freight traffic, and turnover volume of passenger traffic, turnover volume of freight traffic and passenger transportation and freight transportation density of freeway in China.

提出了高速公路运输量的统计方法，并以南京—上海高速公路为例，首次统计了中国高速公路的客运量、货运量、客运周转量、货运周转量以及客、货运输密度。研究表明：在南京—上海通道内，高速公路和铁路起着同样的关键作用；货运方面，高速公路和铁路运送货物价值相差很大，两者是互补性的，客运方面，高速公路客运量中个性化出行与铁路是互补性的，而群体性出行与铁路是替代性的。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。