Introducing mass density allows the equation to be simple, understandable and applicable.
而且，引入质量密度后，该方程形式简单并易于理解和应用。
Introducing mass density allows the equation to be simp...
而且，引入质量密度后，该方程形式简单并易于理解和应用。
You can plot data for a range of elements for properties like the density or the atomic mass.
你也可以使用一定范围内元素的密度、原子质量等元素性质来构建图表。
A If the average density of E coli is 1.1 × 103 g/L, what is the mass of
a single cell 如果大肠杆菌的平均密度为1.1 × 103 g/L，一个
Density The mass Of liquid per unit Of volume Of substance at 15℃.
密度 在15℃的温度条件下，单位体积的某种物质所具有的液体质量。
With common industrial pure aluminum L2 as experimental material, a sulfuric acid AC anodization and black nickel plating process was used to reduce the cost of processing, focusing on the analysis of the effects of temperature, current density and mass concentration of nickel ions on the performance of the black coating.
研究以常用的工业纯铝L2为实验材料，采用硫酸交流电阳极氧化和电镀黑镍工艺来降低成本，着重分析温度、电流密度、镍离子的质量浓度等对黑色膜层性能的影响。
The correlations between mass and temperature, condensational density and temperature of four elementary excitation spectra are also...
四支元激发谱的质量、凝聚密度和温度的关系如图1、图2所示。
During the derivation, it is assumed: the liquid phase is incompressible Newton fluid; there is no mass transfer between phases; it is homothermal and steady state flow; the flow rate of gas phase and that of the liquid phase are the same without the consideration of slippage effect; the density of gas phase and that of the liquid phase in the wellbore are constants; the mixed loss caused by inflow from wellbore is ignored.
在推导的过程中进行了如下假设：液相为不可压缩的牛顿流体；相间不存在传质；等温、稳态流动；不考虑滑脱效应，气相和液相的流速相同；井筒中气相、液相的密度为常数；忽略井壁入流引起的混合损失。
Results: The main X-ray findings in 37 cases around the knee joint were thickening of cortex, soft tissue mass with focal or cauliflower-like high density tumor bone in it.
结果：发生在股骨远端及胫骨近端的37例病例中X线表现为皮质骨增厚，软组织内可见团状和菜花状不规则高密度瘤骨。
In order to systematically analyse the major driving mechanisms of the turbulence in plasmas, the instability driven by ion temperature gradient, mass flow shear, parallel to the magnetic field, and the impurity ion density gradient in plasmas with multiple ion species is studied in a sheared slab magnetic configuration.
为综合分析影响磁约束等离子体不稳定性的重要因素，研究了磁剪切平板模型下，同时具有杂质离子及平行流速剪切效应的离子温度梯度不稳定性的准线性流体理论。
This paper presents a simple physical model of change of mass density for calculating the diffraction intensity of multilayer, which is proved by the experiments of the small angle X-ray diffraction.
提出了这种膜系内密度变化的简单物理模型，通过理论衍射强度计算和小角X衍射实验证明这种模型是合理的。
As a result, firstly they have more sols with the content of 69～85% and lower gel crosslinking density with the swelling degree of 2700～5200%; secondly they own many hydroxyl groups in the chains which promote the formation of strong hydrogen bonding; thirdly they display micro-phase separation structure originating from crystal and non-crystal regions; fourthly by controlling the molar ratio of monomers, adjustable mechanical properties(tensile strength of 0.1～0.7MPa, elastic modulus of 0.05～0.7MPa, elongation at break of 12～115%), good hydrophilicity(water contact angle of 45～57°) and low water-uptake(3～8%) can be gained; fifthly after 7.5 day degradation, their mass loss can reach above 30%, and the rate of degradation is influenced by the sol content, crosslinking density, branching degree of sols, hydrogen bonding between gels and sols etc.; finally they are desired to be used as drug delivery carrier, hemostasis agent, bone wax, scaffold material, anti-adhesion film after operation etc.
研究发现，该弹性体溶胶含量在69～85％之间，交联密度较小(凝胶质量溶胀度在2700～5200％之间)；材料结构中含有大量的羟基，分子链段间存在较强的氢键作用；材料具有结晶区域和非晶区域共存的微相分离结构；通过单体摩尔配比的控制，材料具有可调的力学性能(拉伸强度0.1～0.7MPa、弹性模量0.05～0.7 MPa、伸长率12～115％)、较好的亲水性能(水接触角45～57°)和较低的吸水率(3～8％)；材料经过7.5天的降解，其失重可达到30％以上，材料的降解速率受材料的溶胶含量、交联密度的大小、溶胶的支化程度、以及溶胶和凝胶间氢键作用强弱的影响；该材料以期用作药物缓释载体、止血剂、骨蜡、组织工程支架和外科手术防粘连膜等方面。
As a result, firstly they have more sols with the content of 61～63% and lower gel crosslinking density with the swelling degree of 2000～2600%; secondly they own many hydroxyl groups in the chains which promote the formation of strong hydrogen bonding; thirdly they display micro-phase separation structure originating from crystal and non-crystal regions; fourthly by controlling the molecular weight of prepolymers, adjustable mechanical properties(tensile strength of 0.4～0.7MPa, elastic modulus of 0.3～0.7MPa, elongation at break of 100～260%), good hydrophilicity(water contact angle of 34～44°) and low water-uptake(1～9%) can be gained; fifthly, after 28 day degradation, their mass loss can reach above 30%, and the rate of degradation is influenced by the sol content and molecular weight, crosslinking density, hydrophilicity and water-uptake, hydrogen bonding between gels and sols etc.; finally they are desired to be used as drug delivery carrier, hemostasis agent, bone wax, scaffold material, anti-adhesion film after operation etc.
研究发现，该弹性体溶胶含量在61～63％之间，交联密度仍较小(凝胶质量溶胀度在2000～2600％之间)；材料结构中含有大量的羟基，分子链段间存在强的氢键作用；材料具有结晶区域和非晶区域共存的微相分离结构；通过预聚体分子量的控制，材料具有可调的力学性能(拉伸强度0.4～0.7MPa、弹性模量0.3～0.7MPa、伸长率100～260％)、较好的亲水性能(水接触角34～44°)和较低的吸水率(1～9％)；材料经过28天的降解，其失重可达到30％以上；材料的降解速率受到材料的溶胶含量及分子量大小、交联密度的大小、亲水性和吸水率，以及溶胶与凝胶间氢键作用强弱的影响；该材料以期用作药物缓释、止血材料、骨腊、组织工程支架和外科手术防粘连膜等方面。
Rho designates density, f is the mass fraction, and subscripts o and f refer to oxidizer and fuel, respectively.
指定的密度，F是质量分数，并标o和F是指氧化剂和燃料，分别。
Based on the first heat treatment, the second ball milling and calcining favor the osculation and mass transfer of the reactants in the second solid state reaction, and compared with one-step method, the density of resultant LiFePO4/C is ameliorated.
在一次热处理的基础上，二次球磨和烧结有利于第二次固相反应过程中反应物质的接触和传质，较一步固相法提高了生成的LiFePO4的振实密度。
Thus, the new model is quite different from many existing models in the following ways: 1 the exact form of mass conservation, 2 the in-situ instantaneous pressure and the UNESCO equation of state to calculate density, 3 the in-situ density in the momentum equations, 4 finite difference schemes that conserve the total energy.
新模式在以下几方面不同于现有的许多模式：1精确的质量守恒形式：2计算密度时使用的是现场的瞬时压力和UNESCO的状态方程；3动量方程的密度也使用现场密度；4保持总能量守恒的差分格式。
Density or specific gravity measures the mass of an object the measurement is by weight for a unit or a certain volume. typically, density is measured by pounds per cubic foot or kilograms per cubic meter of material. density allows the mass of one material to be compared with that of other materials.
密度或比重措施的对象的质量的测量体重是一个单位或某个卷。通常，密度是每立方英尺或每立方米的材料公斤英镑衡量。密度，使材料质量的一个要比其他材料。
DATA SYNTHESIS: Although there are some differences in the results between human studies and animal studies about the change of bone mineral density after detraining or reducing exercise, both of them get the same conclusion, that is, the bone mass gained by exercise in growth period will be maintaining if persisting appropriate exercise after detraining training.
资料综合：关于停训后和运动量减少后骨密度的变化，一些人体研究和动物研究结果存在一定的差异，但两种研究方法均揭示，停训后坚持一定量运动可以使生长期运动所获得的增加骨量得以维持。
A cohort hard clam, six months old, with size range about 18mm were collected and distributed to twelve cultural pools with different food concentration and density. After a half year culture, 60 specimens were collected from each pool for electrophoresis analysis. We found no difference in genetic variation among cultural pools after mass mortality has occurred. No significant heterozygote superior was found in each locus among pools with vastly different mortality rates. Similarly, there is no signif icant correlation between degree of heterozygosity or multiple locus heterozygosity and shell length.
民国八十年一月份，自文蛤苗养殖户购进一批饲养约半年之同龄文蛤苗，依大小分堆后将壳长18mm左右的文蛤苗，依不同的密度及投饵量分撒於上12个养殖池，经半年实验后每池各取60个文蛤进行电泳分析，发现半龄到一龄的养殖文蛤经大量死亡后，不同养殖池间之遗传差异不大，各池子中具异基因型个体的比率和存活率无显著相关，在成长方面每个基因座上异基因型文蛤的壳长并未大於同基因型的个位体，多对位点异臾质性和壳长大小亦无明显的正相关。
Using the data of inclination, radius and mass of disc galaxies, the mass density and oblateness of 93 disc galaxies have been obtained.
盘星系的质量密度在研究星系的结构和演化时，星系的质量密度是一个重要的物理量。