查询词典 density of distribution

The results show that there exist obvious differences of the distribution density of oil cells among the species in the Lauraceae. The presence of oil cells and mucilage cells is found to be a marked anatomical feature of the leaves in most of the plants in the Lauraceae.

利用组织透明法和石蜡制片法对樟科21属、112种、5变种和2变型植物叶中油细胞的分布密度、油细胞与粘液细胞的形态结构及其在叶肉中的具体分布进行了比较研究。

By the minimum risk Bayes decision theory, this paper develops a new way of image segmentation: establish the mathematics model of image segmentation; estimate the probability density of grey scales and figure out its math-expectation and square difference that accord with normal distribution and the loss function; and judge the every pixel dot in the image according to the minimum risk Bayes decision theory and determine whether it is of target or non-target images, thereby realizing the extraction of the target image.

依据最小风险贝叶斯决策理论，提出了一种基于最小风险贝叶斯决策的图像分割方法。首先建立图像分割的最小风险贝叶斯决策模型，对灰度级类条件概率密度估计出其符合正态分布的数学期望和方差以及损失函数，再依据最小风险贝叶斯决策理论对图像中的每一像素点进行目标图像和非目标图像的类别判断，从而实现目标图像的提取。

The noninformative prior of the standard deviation of error terms was introduced for Bayesian analysis. Then, given the prior density of the random coefficients in the degradation path model, the Markov Chain Monte Carlo method was adopted to generate samples of joint posterior distribution of random coefficients and unknown standard deviation.

为了处理未知的误差项方差，引入相应的标准差的无信息先验分布，并进一步结合退化轨道模型中随性参数的先验分布，利用马尔可夫链蒙特卡罗方法得到随机参数及误差项标准差的联合后验分布的采样值，进而实时预测产品在未来一段时间内的可靠度。

Methods Radionuclide ambulatory renography and color Doppler renal hemodynamics were studied in 30 patients with esential hypertension and left ventricular hypertrophy and 21 healthy control group. The glomerular filtration rate,renal index and the distribution of intrarenal artery were investigated.The resistive index, the systolic peak velocity,andthe low diastolic flow velocity and acceleration time of theintrarenal arterial flow were measured. Results Compared with control group the density of intrarenal artery of patients with esential hypertension and left ventricular hypertrophy were significantly decreased.

对30例高血压伴左室肥厚病人及21例年龄相当的健康人对照组行核素动态肾功能检测及彩色多普勒超声肾血流动力学检查，测定肾小球滤过率和肾脏指数及肾内动脉分布，段动脉、叶间动脉的阻力指数，血流峰速加速时间，收缩期最大血流速度，舒张期末最低血流速度。

The average effective root density of Black Locust is as much as 45％ of Arborvitae's in the root roomalthough the distribution depth of Black Locust root is twice more than that of Arborvitae's in the same ages ofstand.

刺槐根系分布深度是侧柏的2倍多，但平均有效根长密度只有侧柏的44.5％。

Methods 12 guinea pigs of 20 months with 3 cm×3 cm hair sheared from their backs were divided into control group and experimental group. Rhodosin and deer serum preparation was besmeared on the skin of guinea pigs in experimental group, and cosmetic matrix was besmeared on the skin of animals in control group for 60 d. The distribution of type Ⅲ collagen was observed with Sirius red staining and HE staining. The fission index of the cells of stratum basale, the thickness proportion of stratum corneum to epidermis, the volume density of the collagen fibers and small blood vessel in dermis, the number of fibroblasts in aging skin were meassured with technique of sterology.

背部被剪去3 cm×3 cm毛的12只20月龄豚鼠被随机均分为给药组和对照组，给药组涂抹红鹿制剂，对照组涂抹化妆品基质，连续涂抹60 d；应用天狼猩红、HE染色和体视学技术分别观察和测定老化皮肤中Ⅲ型胶原的分布、表皮基底层细胞的分裂指数、角质层同表皮厚度的比例、真皮胶原纤维和微血管的体密度和成纤维细胞的数目。

Zeta potential,density of surface carboxyl groups,the interaction between carboxyl groups and component in copolymerization emulsion,mechanical properties of films,state of water,particle diameter and distribution of particle diameter and theological behavior of emulsion were investigated by Zeta meter,the conductometric titration, particle size apparatus,dynamic mechanics analysis,differential scanning calorimmetry,scanning electron microscope,rheological apparatus,respectively, to study the mechanism on the water resistance of modified PVAc emulsion.

利用Zeta电位仪、电导滴定法、激光粒度仪、DMA、DSC、SEM、流变仪等手段从Zeta电位、表面羧基密度、羧基和乳液组分中的相互作用、羧酸改性后胶膜的力学性能、水的存在状态、粒径分布、流变性能和微观形貌方面探索了羧基提高乳液耐水性的机理。

The effect of thermal and anaerobic ageing on the structure and properties of NR vulcanizates was studied.The crosslinking density and distribution of NR vulcanizates during ageing were determined with the method of devulcanization by using the chemical probes,and the physical and dynamic properties were also determined.

研究了热空气老化和真空老化对NR硫化胶结构和性能的影响，采用化学探测剂脱硫的方法测定了老化过程中NR硫化胶交联密度及交联键分布变化的情况，同时测定了硫化胶的力学性能和动态性能随时间变化的情况。

In this paper, cholinergic neurons was mapped in the two kinds of birds (Emberiza rutila and Fringilla montifringilla) by using immunohistochemical method.The soma size and cell density of cholinergic neurons in the three song control nuclei, the higher vocal center, the robust nucleus of the archistriatum and area X, were measured and compared. Here we discussed the distribution of cholinergic neurons and their effect on the process of song producing and song learning.

本文以中国北方地区常见的两种鸣禽栗鹀和燕雀为材料，应用免疫组化方法，对两种鸣禽发声控制核团，即上纹状体腹侧尾核或高级发声中枢、古纹状体粗核、X区内胆碱能神经元的胞体大小和胞体密度进行了观察测量，旨在探讨胆碱能神经元在发声控制核团内的分布情况及其在鸣啭产生和学习过程中的作用。

The kinetic behaviors of ethylene homo- olymerization and ethylene / l-hexene co-polymerization , catalyzed by the metallocene catalyst PS-DVB-MC in an 0.5 L stainless steel reactor , were studied. The effects of polymerization conditions on ethylene polymerization , such as concentration of catalyst , temperature of polymerization , pressure of ethylene , molar ratio of AI / Z r , etc ., were also investigated . Some leading results were as follows : the activity of the catalyst PS–DVB- MC for ethylene homo-polymerization was high ( 1.053 x 107 gPE / mol Zr·h ), but the molar ratio of AI / Zr was low ( 350:1 ); the catalytic ability for ethyleneα-olefin ( such as l hexene etc .) co-olymerization was great , and the corresponding activity come up to a maximum of 1.753 x 107 gPE / mol Zr·h while concenlration of l-hexene was 0.080 mol / L ; the molecular weight of polyethylene was about 180,000 , meanwhile the molecular weight distribution was narrow ( 2.19 ); the bulk density of polyethylene and ethylene / l-hexene co -polymer were 0.25 and 0.34 respectively .

采用0.5L高压不锈钢反应釜，对催化剂PS–DVB-MC催化乙烯均聚和乙烯/ l-己烯共聚合的动力学行为进行了研究，详细考察了催化剂浓度、反应温度、压力、Al/ Zr比、1-己烯浓度等因素对乙烯聚合反应的影响，得到如下主要结论：催化剂PS-DVB-MC具有催化乙烯均聚的高活性(1.053×107g PE / mo1 zr.hr)，低Al / Zr比( 350：1 )；具有良好的催化乙烯与α-烯烃(如1-己烯等)共聚的能力，在1-己烯浓度为0.080 mol / L时，催化活性达到最大(1.783×107 g PE / molZr.hr)；乙烯均聚产物的分子量在18万左右，分子量分布窄( 2.19 )。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。