查询词典 marginal density

When the pollen density of pollen donor exceeded the critical density, the gene flow frequency did not increased any longer, and the maximum gene flow frequency detected was equal to the outcrossing rate of pollen receiver in theory.

在其他因素都固定的情况下，如果花粉受体的异交率较高，那么到该花粉受体的基因漂移频率也相对较高。

Results: The proportional volume, numerical density of the granules in ovariotomy group were less than those in sham-ovariotomy and ovariotomy estradiol groups (P.001); the proportional volume and numerical density of ASG in myocardial cells almost came back to the normal level with small dose estradiol; along with the enhancement of estradiol dosage, the content of ASG in myocardial cells was more than those in sham-ovariotomy and small dose estradiol group (P.01), and showed a quantity-efficiency relation.

结果：切除大鼠双侧卵巢后，心房特殊颗粒的体密度和数密度与对照组及用雌二醇组比较明显减少(P＜0.01)，小剂量雌二醇可使大鼠心肌细胞心房特殊颗粒的体密度和数密度恢复到正常水平，随剂量增加，心肌细胞心房特殊颗粒的量也伴随增加，呈量效关系。

According to the analysis of density of state and charges density, we found that ozone molecular was chemically adsorbed on the bridge site of S1 as ozonide, and ozone molecule decomposed into one adsorbed surface oxygen atom and one free oxygen molecule.

态密度和电荷密度分析结果进一步证实了O3分子在S1上吸附是桥位化学吸附，形成表面臭氧化物，在S2上吸附分解为1个被吸附的表面氧原子和1个自由氧分子。

The noise frequency modulation signal was particularly analyzed. The Fokker-Planck equation of noise frequency modulation was presented and the Motion-Group Fourier Transform was used by converting the partial differential equation into the variable coefficient homogenous linear differential equations. Then the solutions were given by using the peano-baker series. So the probability density function of noise frequency modulation in the filter was given. On the basis of the probability density function the stochastic resonance of noise frequency modulation signal is analyzed.

首先建立了噪声调频干扰信号通过脉冲压缩雷达中频滤波器后所满足的福克尔－普朗克方程，然后利用群移傅立叶变换（Motion-Group Fourier Transform，MGFT）将此偏微分方程化成了变系数齐次线性微分方程组，并利用Peano-Baker级数法给出了该方程组的解，最后得到了噪声调频干扰信号通过脉冲压缩雷达中频滤波器后的概率密度函数，在此基础上研究了噪声调频干扰信号造成的随机共振现象。

I have calculated the species diversity for 3 layers (i.e. tree layer, shrub layer and herb layer) by means of various biodiversity index formulas and analyzed the relative species abundance using 9 models of the probability density distribution functions, such as, 3 Distribution (or Beta Distribution, Weibull Distribution, Lognormal Distribution, Poisson Distribution, Binomial Distribution, Negative Binomial Distribution ,Geometric Distribution, etc.. chi-square analyses were conducted on species distribution by using the chi-square test formulated by Pearson to test which distribution function is better, the result of chi square test made it possible to reject the other 8 distribution functions, theβdistribution function performs better than other probability density functions, it has a very close approximation, which can be used for the description of relative abundances of species in forest communities in this data set.

在相对多度研究上选用了九种概率分布模型，这九种概率密度分布函数依次为：贝塔分布、Weibull分布、对数正态分布、泊松分布、二项分布、负二项分布、几何分布、对数分布和奈曼A型分布，并进行了严格的卡方检验，结果表明：其它八种分布均被遭到拒绝，只有贝塔分布获得了通过，且拟合的结果非常理想。

The results indicated that laser effective penetrating depth and laser power density and radiating time is positive relationship, but the relationship with energy density is not good.

模拟结果表明激光有效穿透深度与激光功率密度和时间都是正向相关，而与能量密度的正向相关性较差；激光作用时间越长，角膜组织中的温度梯度越小。

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The Density Functional Perturbation Theory can be used to reveal the lattice dynamics based the Density Functional Theory.

本论文利用第一性原理方法，从原子和电子层面上研究了氧化物电介质薄膜的表面效应以及界面应力作用的基本规律。

Due to cooperation and competition between the hopping integral and the on-site repulsion at different sites, the charge density and spin density can transfer between the radical sites and the phenylene ring sites.

由于不同格点上电子跳跃积分与Hubbard排斥能的合作与竞争，自旋密度和电荷密度可在苯环与自由基之间转移。

From the femur bone density analysis of protein expression, we can see that light chain lactoferrin, annexin decreased and the expression of enolase, ATP synthase, acetyl-coenzyme A reductase, the expression of troponin, may be related to ovariectomized femoral bone density in osteoporosis-related happened; strong bone of the femoral osteoporosis Po intervention effect may be related to reduced enolase, ATP synthase, troponin, CK-MB, acetyl phosphoglycerate enzyme, the expression of myosin, and the increase in lactoferrin light chain, pyruvate kinase isoenzyme, protein expression crown.

从股骨密质骨蛋白质组表达分析可知，乳铁蛋白轻链、膜联蛋白A3的表达下降及烯醇化酶、ATP合酶、乙酰辅酶A还原酶、肌钙蛋白的表达增强，可能与去卵巢后股骨密质骨骨质疏松的发生相关；强骨宝对股骨骨质疏松的干预效应可能与下调烯醇化酶、ATP合酶、肌钙蛋白、肌酸激酶同工酶、磷酸甘油酸变味酶、肌球蛋白的表达，和上调乳铁蛋白轻链、丙酮酸激酶同工酶、冠蛋白的表达有关。

I can not negligent, he should do what?

我不能不在意了，他要做什么呢？

It is very dangerous to swim in the river alone.

一个人到河里游泳是很危险的。