查询词典 density function

The polarization curve is not sufficient for a reliable and unique validation of a PEMFC model since different parameters can lead to an identical polarization curve. A three-step validation approach is proposed for a complete and unique validation. These three steps are:(1) validated by the global polarization curve,(2) validated by the local current density distribution curve, and (3) validated by the cathode over-potential and anode over-potential versus current density curve. The results from the comparison of four flow-fields show that the PEMFC performance of the flow-fields decreases in order by interdigitated, metal foam, pin-type and parallel.

通过PEMFC参数敏感性研究发现，PEMFC性能受多种参数的影响，这些参数可分为非敏感性参数、敏感性参数和高敏感性参数；与阳极侧参数相比，PEMFC性能对阴极侧的参数更敏感；不同参数值的组合可以得到几乎完全相同的极化曲线，因此电池的极化曲线不足以用于验证数学模型的唯一性与可靠性；为验证PEMFC数学模型的唯一性与可靠性，提出了模型验证的三步法：极化曲线验证、局部电流密度验证和阳极总过电位与阴极总过电位验证。

Results Benign tumor, such as aldosterone adenoma, cortisol adenoma, and pheochromocytoma, are generally of small volume, even density and clear boundary, on the contrast, the malignant tumors are usually anomalous, leaf-shaped and are of uneven density.

结果 醛固酮腺瘤，皮质醇腺瘤，嗜铬细胞瘤等良性肿瘤体积一般较小，密度均匀，且边界清楚；而恶性肿瘤表现为不规则，可呈分叶状，密度不均匀。

Results Benign tumor, such as aldosterone adenoma, cortisol adenoma, and pheochromocytoma, are generally of small volume, even density and clear boundary, on the contrast, the malignant tumors are usually anomalous, leaf-shaped and are of uneven density.

目的 总结肾上腺肿瘤的螺旋CT表现及特征，探讨鉴别诊断依据。方法回顾性分析36 例经手术、病理证实的各类肾上腺肿瘤，观察其CT征象。

On the basis of micromodel, relation of zinc oxide grains'average diameter to amount of seed grains has been studied out. Relation of 1mA /cm〓 electric field density, nonlinear coefficient, leakage current, breakdown energy density to amount of seed grains has been explained.

在模型基础上，推导出ZnO晶粒的平均粒径与籽晶含量的关系，解释了E〓、非线性系数、漏电流和击穿能量密度与籽晶含量的关系。

Electrochemical supercapacitor is a new energy storage equipment and component between batteries and electrostatic capacitors, which has higher energy density than that of electrostatic capacitor, higher power density than that of batteries, long-cycle life and wide-temperature range. It can be applied into many fields such as hybrid electric vehicle, mobile telephone and microcomputer.

电化学超级电容器是一种介于蓄电池和常规电容器之间的新型储能设备及器件，它具有比常规电容器更大的比能量、比蓄电池更大的比功率、长循环使用寿命长和使用温度范围宽等特点，它在混合电动汽车、移动电话、微机等众多领域内有广泛应用前景。

The carbonate reservoir is characterized by the fact that the azimuth of fractures is related with structural axis, the developmental extent of fractures and structural location are close related to dip of structure, low-dipping structural axis has not growth fractures. Otherwise, growth fractures, density of fractures are related thickness of layer, more thickness, then less density of fractures. Intra-fracture of layer is main. Some marlstone and anhydrite barriers exist in the reservoir, and become some non-connected oil-water system.

结果表明：碳酸盐岩油藏为裂缝的发育程度与构造位置及构造倾角的大小有关，构造轴部倾角小裂缝不发育，构造翼部倾角大，裂缝发育；裂缝发育密度随着单层厚度增加而逐渐减小；裂缝以层内缝为主，穿层大裂缝少；油藏中存在若干泥质灰岩和膏盐的隔夹层，形成多个连通不畅的油水分布系统。

According to authors' understanding on the density contrast of the lunar crustal and mantle materials, depths of typical mascons were estimated using various approaches. The estimations indicate that the mascon in Mare Orientale may caused by a lunar mantle plum, a basaltic lava with high density.Key words lunar gravity; mare; Mascon; clementine; lunar prospector

从宏观角度看，月球布格重力异常与月球地形起伏是相关的，统计结果表明它们呈弱负相关，从均衡角度来说，在月球停止大规模内部物质运动之前，月球壳幔可能已基本达到均衡；从Mascon深度估算结果来看，一些大型的Mascon基本属于玄武岩浆&充填&型的，少数Mascon可能与月幔柱有关，如东方海Mascon。

The porosity was effected by density of flan. The porosity was minished as density of flan accretion.

常压烧结获得样品的导电性很差，基本属于绝缘体。

The research on the tissue culture and cell suspension culture showed that thesuitable culture medium for inducing bud was MS supplemented with 1.5mg/L 6-BAand 0.1mg/L NAA, and for the generation-continuing multiplication was MSsupplemented with 1.5mg/L 6-BA and 0.2mg/L NAA. The rooting medium was1/2MS supplemented with 0.5mg/L IBA and the rooting rate was 45.0%. Plantletsurvival after transfer to sand was 52.5%.The induction rate of calli was66.7%～86.6% and the optimum medium was MS medium with 0.5mg/L 6-BA and2.0mg/L 2,4-D. The calli became smallest partical size, friable and had gooddispersion ability after 3 times successive transfer culture, the optimum medium wasMS medium with 0.2mg/L 6-BA and 2.0mg/L 2,4-D. Culturing these particles on sixkinds of MS liquid media with different hormone contents, the optimum medium wasselected basing on he change of the density of single-cell, the density of cellaggrefate and the mass of cell.

对蒜头果进行的组织培养与细胞悬浮培养研究结果表明：MS+6-BA1.5mg／L+NAA0.1mg／L+蔗糖3％激素组合能够较好地诱导芽的初始分化和增殖，适宜的芽苗继代增殖培养基为MS+6-BA1.5mg／L+NAA0.2mg／L+蔗糖3％；采用1／2MS+IBA0.5mg／L+蔗糖3％为生根培养基，生根率为45.0％；移栽到河沙的生根苗成活率为52.5％；愈伤组织诱导率为66.7％～86.6％，其中以MS+6-BA0.5mg／L+2，4-D2.0mg／L+蔗糖3％的培养基最佳，其诱导出的愈伤组织具有较强的增殖能力和较好的脆散结构，最佳继代培养基为MS+6-BA0.2mg／L+2，4-D2.0mg／L+蔗糖3％，且培养基中的6-BA与2，4-D浓度的比值越小，愈伤组织生长越快，结构越脆散，增殖率越高；将继代后的愈伤组织转入6种含不同激素浓度组合的MS液体培养基中进行振荡培养，在综合分析各培养基的单细胞密度，细胞团块密度，细胞生物量增长率等指标后，初步筛选出MS+6-BA0.2mg／L+2，4-D2.0mg／L培养基为较好的液体培养基。

The formula demonstrates that the cake layer thickness is directly proportional to filtration permeation velocity and directly proportional to the density subtractor of suspension and permeating liquid, inversely proportional to the density of cake layer.

公式表明，滤饼层厚度与过滤渗透速度和悬浮液与渗透液的密度差成正比，与滤饼层的密度成反比。

The dissecting of samples in group2 were difficult. The root of pulmonary artery and ascending aorta failed to be unfolded because fibrous tissue was tough, right and left fibrous trigone were too firm to be solved by hand. Cardiac muscle fibers couldn't be stripped along myofibrillar trajectory since they were prone to break because of their friability.

组2的心脏解剖困难，表现为纤维组织坚韧，游离肺动脉非常困难；徒手无法松解左、右纤维三角，肺动脉和主动脉根部的游离非常困难；心肌纤维坚硬、质脆，解剖时容易断离成碎块，无法沿纤维走行方向剥离。

We have battled against the odds in a province that has become increasingly violent.

我们对在一个争夺日益激烈省的可能性。