平均密度

The following are the expressionsfor the mean pressure set up at the detection plate and for the time of the signal toprogagate from the radiator to the detector:这里是1个公式,省略） where Re is the real part of the expression appearing within the braces, 0 is the density ofthe medium, vo is the amplitude of the vibrational velocity, c is the speed of sound in themedium, d2 = I +(r/zcos 8, z is the distance between the emitting and receiving plates, B is the angle between the axis of the acoustic channel andthe axis of the tube, r = vro/c, v is the flow speed of the fluid, d is thediameter of the pipe, m is the circular frequency, k is the wave number,where a is the radius of the plate (this is taken as the same for the emitting and receivingplates for simplicity, but there is no difficulty in discussing plates differ~mg in radii),,~ is the vibrational frequency of the emitting plate, andThe triple sums in the expressions for N~ and N2 may be neglected if the flow speed islow, since the contributions for these become negligible.

以下是表达式平均压力为定于检测板和为信号时间progagate从散热器到探测器：（这里是1个公式，省略）假如再是出现在大括号表达式的实部，0是密度中期，沃是速度的振动幅度，C是健全的速度中，D2中=我+的导向8，z是对之间的距离发射与接收板，B是声之间的通道轴角该管的轴，R =中心内大多分为/荤，v是流体的流动速度，，D是管道直径，m是圆频率，k是波数，的其中一盘是半径（这是为重点，同样的发射与接收为le简单板，但没有讨论板的困难，在半径不同毫克），，是发光板振动频率，和在N的表达式的三重总结和N2可以忽略，如果流速低，因为这些变得微不足道的贡献。

The results of experiments on a great deal of image sequences of closely packed particles indicate that, for closely packed aggregates particles, quite reasonable estimates of number of particles or average size often arise from the method based on the edge density.

通过对大量颗粒图像进行的实验，特别是岩石骨料图像序列的实验结果显示，对于紧凑型的石料颗粒，采用基于边缘密度的方法检测颗粒数量或者平均尺寸常常可以收到相当好的效果。

Correlation for isothermal oil compressibility was developed as a function of temperature, pressure and density data.

并建立了温度、压力和密度函数的原油压缩系数关联式，其对404个数据点的平均误差为2.96％。

The continuous adjustment pattern density distribution to uniform, and, according to net colored discernibility.

1不断调图案的密度漫衍给平均，并给按色别辨别挂网角度。

The minimum average threshold current density of 20 A/cm 2 is achieved.

获得了最低为20 A/cm2的平均阈值电流密度。

There are an average of 449 people per sq km, is the world's most densely populated countries in the world.

平均每平方公里有449人，是世界上人口密度最高的国家之一。

At the normal state, porphyrin molecules do not have EPR signal. However, light excitation may cause a transition of porphyrin molecules from singlet to triplet. At the same time, the change from diamagnetism to paramagnetism occurred to porphyrin molecules. In this case, the two un-paired electrons are nearby each other and cause a strong interaction, giving EPH signal with sharp peak at g = 2.000. The g value increased with an increase in electron cloud density.

常态下卟啉分子没有EPR信号，在光的激发下，卟啉分子由原来的逆磁性分子变成顺磁性的激发三重态分子，这种激发三重态分子在分子轨道上具有两个未成对电子，这两个电子相距很近，彼此之间发生很强的相互作用而产生电子，它的g值随卟啉共轭体系平均电子云密度增大而变大。

At the normal state, porphyrin molecules do not have EPR signal. However, light excitation may cause a transition of porphyrin molecules from singlet to triplet. At the same time, the change from diamagnetism to paramagnetism occurred to porphyrin molecules. In this case, the two un-paired electrons are nearby each other and cause a strong interaction, giving EPR signal with sharp peak at g =2.000. The g value increased with an increase in electron cloud density.

常态下卟啉分子没有EPR信号，在光的激发下，卟啉分子由原来的逆磁性分子变成顺磁性的激发三重态分子，这种激发三重态分子在分子轨道上具有两个未成对电子，这两个电子相距很近，彼此之间发生很强的相互作用而产生电子，它的 g 值随卟啉共轭体系平均电子云密度增大而变大。

Results (1) Maximum bound volume and equilibrium dissociation constant of β2AR of lymphocyte in asthma patients at remission stage were markedly higher than that in normal subjects, while cAMP levels in blood plasma showed no difference.

结果缓解期哮喘患者外周淋巴细胞βAR的密度较正常人明显升高，血浆cAMP水平无显著差异，而发作期哮喘患者βAR及血浆cAMP水平均较正常人明显降低；缓解期哮喘患者外周淋巴细胞β2ARmRNA水平与正常人无显著差异。

The results show that both the incidence and prevalence rates are increasing over 1996 to 2003; the incidence rate, prevalence rate, survival function, mean onset age, and mean remaining life after onset of females are all larger than those of males. In addition, females are less biologically aged than males at the same chronological age by 1.3279 years in terms of the empirical distribution function of onset age.

研究结果显示，首发率和盛行率皆有逐年上升的趋势，而女性患者之首发率、盛行率、存活机率、首发后之平均余命皆高於男性；此外，若单纯以男、女性患者之首发年龄而论，其经验机率密度函数显示：男性患者之生理年龄比同年龄的女性患者早衰1.3279岁。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。