查询词典 density

The changes of population density of Rhizosphere bacteria, fungi and actinomyces, and the types and population density of nitrogen-fixing bacteria, phosphobacteria and potassium-bacteria in different types of soils were studied.

研究了不同肥力烟区根际细菌、真菌和根际放线菌的数量变化，以及固氮细菌、磷细菌和钾细菌的数量和种类的变化。

Results: The most common locations of PIP were at the margin of both lower lobes and associated with local pleural thickening and adhesion. The density of nodule in which CT attenuation value was 15~60 HU (26.9±13.5HU) was lower than that of PLC. Most of them were round/round-like and irregular in shape. The interior density of lesion was inhomogeneous. The presence of calcification or multiple cavitations, straight margin sign, hole sign and without hilar and mediastinal adenopathy were of great significance in the diagnosis of such kind of disease.

结果：炎性假瘤多位于两肺下叶，邻近胸膜增厚、粘连，病灶密度偏低（平扫CT值15~60HU，平均26.9±13.5HU），与周围型肺癌比较有统计学差异，其形态以圆形／类圆形和不规则形多见，病灶内密度多不均匀，可见钙化及多发空洞，边缘呈平直状、周围见毛玻璃样改变及肺门纵隔无淋巴结肿大等征象对本病的CT诊断有意义。

Through conducting research on the classification of high density drilling fluid, the optimal grain distribution of adulterant is determined using the density-grain-viscosity curve.

对高密度钻井液进行了分类，以密度－粒度－黏度曲线确定了最优化加重剂粒度分布，通过优化基浆配制工艺、优选强抑制钻井液体系、优化加重剂与钻井液的粒度分布研究，应用超微细、亚微态粒子稳定技术，强化固相控制，形成一套优化的高密度阳离子钻井液技术工艺。

In this paper, with field experiments the allometry relationship between plant height and biomass of annual plants, Avena sativa and Vicia sativa, under low density and high density, were investigated, and the data obtained from experiments were analysed with the linear and nonlinear regression.

通过田间试验研究了两种一年生植物燕麦和箭豌豆在高密度和低密度条件下表现出来的株高与生物量之间的异速生长关系，并用线性回归和非线性回归的方法对所得数据进行了分析。

ResultsAmong 8 cases,there were low or low slightly density as in 7 cases, single high slightly density tubercle as in 1 case, following these,there were multiple neoplasm metastasis of brain other sites in 2 cases, annular shape enhancement in 3 cases after contrast CT scanning, peripheral edema lightly as in 6 cases and no in 2 cases, suprasellar region, ambiens cisterna and corpora quadrigemina were compressed, transposited and distorted differentlly,and obturated or widened locally.

结果7例脑干转移瘤呈低或略低密度影，1例单一结节为略高密度影，伴随脑内其他部位多发转移2例，3例增强扫描呈环形强化，较度水肿6例，无水肿2例，环池有不同程度受压移位、变形，以及局限性闭塞或增宽。

Whereas, the predicted results of ammoniac nitrogen degradations in case of different refuse densities display that once the refuse density is less than 535 kg/m3, the refuse density has little effect on the leachate ammoniac nitrogen degradation.(2) the diameters of leacheate collection pipes is also one of important factors to influence the leachate quality degradation.

但是，对不同压实密度的准好氧填埋场的渗滤液氨氮衰减预测显示，当压实密度小于535 kg／m~3时，其对准好氧填埋场的渗滤液氨氮降解效果影响不甚明显；(2)渗滤液收集管管径也是影响准好氧填埋场降解效果的重要因素之一。

Shadow effect can not be neglected for thermal analysis of spacecraft,Accroding to the angle between solar light and antenna orbit plane and its orbit location,analytical geometry method was used for accurately calculating solar radiation heat flux distribution of reflector surfaces.To analyze the temperature field under heat flux,the formulations of net radiation flux density between two gray elements and the net flux density of gray surface under external thermal flux were deduced.Based on the characteristic of space environment,the nonlinear temperature distribution in transverse direction of reflector shell self radiation were considered,the finite element formulations were given for orthogonal material layered shell by Galerkin method.A layered element including a inner heat source layer was proposed,and the finite element formulation expressed by DOF of the inner heat source layer were put forward with temperature and heat flux boundarys between adjacent layer.

单馈反射面赋形天线是未来星载天线发展的一个重要形式，分析了基于物理光学、几何光学和几何绕射理论的理想反射面辐射场；介绍了基于几何光学的反射面天线赋形方法；针对赋形过程中辐射场的快速分析要求，比较分析了基于物理光学的Fourier-Bessel和Jacobi-Bessel级数展开方法以及GB展开分析方法；利用GB展开快速分析方法在20GHz频率下对0.6m口径的天线进行赋形分析，实现中国大陆的30dB增益覆盖，通过数值计算研究了固定增益期望下的口径尺寸随频率的变化，以及频率为20GHz的不同尺寸天线赋形后的覆盖目标区域最大增益的变化情况。

Electronic structure of tetragonal HfO2 crystal has been calculated using localized density approximation approach of density functional theory.

采用密度泛函理论框架下的局域密度近似，计算了四方HfO2晶体的电子结构，包括能带结构和态密度。

In order to represent accurately and concisely the changing characteristics of one-dimensional spectrum density function in the chatter development. This thesis, for the first time, proposes the Edgeworth asymptotic expansion formulas of spectral density. A detailed proof is given. Some new statistic including spectral skewness, spectral kurtosis and spectral cumulants are proposed.

为了准确、简洁地表达一维谱密度函数在切削颤振建立过程中的变化特征，论文首次建立了一维谱密度函数的Edgeworth渐近谱展开式，给出了详细的证明；并由此提出了"谱偏态系数"、"谱峰态系数"和"谱累积量函数"等新的谱统计量。

Unfortunately, it has been shownthat these methods are not suitable to study about chemical bonds due to not involvingchemical bonds. In order to consider chemical bonds obviously, we have proposed an atom-bondelectronegativity equalization model on the basis of density-functionaltheory and electronegativity equalization principle. The main contents of our atom-bond electronegativity equalization model contain:(1)Considering the fact that there are varies of chemical bonds in molecules andpartitioning the molecular electron density as summations of atomic electron densitiesand chemical bond's electron densities, we obtained the basic equations of atom-bondelectronegativity equalization model: the expression of the total energy 〓, theexpression of the atom electronegativity 〓 and the expression of the bondelectronegativity 〓.

为了明确地考虑和处理分子中存在的化学键，以便能够更好地描述体系中的电荷分布进而准确地描述分子体系中的有关物理化学性质，尤其是与化学键有关的物理化学性质，我们在密度泛函理论和电负性均衡原理基础上提出了原子-键电负性均衡模型，原子-键电负性均衡模型的主要内容是：(1)考虑到分子体系中存在各种化学键这个事实，将分子空间看成是由原子区和化学键区组成的，将分子的单电子密度表达成为分子中各组成原子的单电子密度和各化学键的单电子密度的加和，从而得到了原子-键电负性均衡模型的基本方程：分子体系总能量〓和分子中原子电负性〓和化学键电负性〓表达式。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新