查询词典 average density

Results There 2 237 rats were captured with an average rat density of 6.26%. R.flavipectus and Xenopsylla cheopis accounted for 24.38%,82.83, and the infection rate of rate with flea was 34.0%, with total flea index of 1.16, and Xenopsylla cheopis flea index 1.13. No F1 antibody was detected.

结果 捕获鼠形动物2 237只，平均鼠密度6.26%，鼠染蚤率33.11%，黄胸鼠构成比24.38%，印鼠客蚤构成比82.83%，总蚤指数1.16，印鼠客蚤指数1.13，鼠疫实验室检测用4种方法未检出阳性标本。

The test results show that the average current density,frequency and duty ratio remarkably affect the internal stress of electroformed layer.

通过试验，讨论了脉冲电流电参数对镍铸层内应力的影响；简要分析了铸层内应力的成因。

But the vibrios quantity in those two ponds, in which disinfectants were used, were higher with an average of cell density at 3731 cells/cm^3 and 4182 cells/cm^3, and the water color changed greatly, furthermore, the body color of shrimp was abnormal.

另一使用消毒剂处理水质的养殖场弧菌数量较高，两口监测池的弧菌细胞密度均值分别达到3731、4182个／立方公分，且水色变化较大，对虾出现体色异常现象。

deviation of the antenna radiation resistance seems larger in some textbooks about the electromagnetic theory for the editors have made some similar treatment when discussing the radiation power of short antenna.combining the concept of physical with mathematical tools and the precise results are gained,that is the real radiation resistance of electric dipole antenna is about ten times smaller than that of the approximate results in the actual literature by researching the electromagnetic field theory and average energy density.this offers evidence to grasp the radiated ability accurately.

小 摘要：在部分有关电磁场理论的教材中，编者讨论短天线的辐射功率时，由于作了某些近似处理而所得天线的辐射电阻值偏差较大。从天线辐射的电磁场理论和平均能流密度出发，使物理概念和数学工具相结合，运用矢量运算推导出精确的结果，即电偶极子天线的实际辐射电阻要比文献中的近似结果小数十倍，因而为准确把握天线的辐射能力提供了依据。

Measurement of radial and azimuthal current density on the beam cross-section in different time and energy fluence on beam spot center with 13% more than its average value for the beam is also presented.

测量还给出了不同时刻束截面上的径向和角向束流密度分布，而束斑中心处的能注量高于平均值约13%。

The harm extent of Dendrolimus tabulaeformis and D. spectabilis were analyzed by fourteen forest factors, from which four significant ones were selected: crown density, altitude, average diameter at breast height and MLP. MLP is a new parameter suggested in this paper. It is better than diversity index to the harm extent, and it can indicate some information on not only the under story plant species diversity but the forest environment. Using the four key factors a multiphase linear regression model was made for risk analysis of the harm extent of pine caterpillar.

该文首次提出了林下植物喜湿度参数MLP(Moisture-Loving Parameter)，并用包括MLP在内的14个林分因子与松毛虫危害程度进行逐步回归分析，从中筛选出主林层郁闭度、海拔高度、油松平均胸径和林下植物喜湿度参数4个关键因子，与松毛虫危害程度之间均呈显著的负相关关系，并进一步用这4个因子与松毛虫危害程度建立多元线性回归模型，该模型可对松毛虫危害程度进行风险评估。

The results show that the precooling time of the probe is shortened significantly with the help of the vapor liquid separator, and decreases with the driven pressure. With the helical coiled wire and the helical mesh, significant thermal Oscillation corresponding the density-wave is observed in the precooling time. The average heat transfer coefficient enhances 1.5 times with the mentioned heat transfer enhancement techniques, and the temperature of the 2.5 min cryoprobe surface can reach -160℃ in 17℃ brine within 10 min.

结果表明：使用了快速预冷汽液分离器后，探针预冷时间大大缩短，并随驱动压力增大而减小；加入螺旋丝和螺旋丝网后，在预冷阶段出现明显的热力振荡，并伴有密度波振荡，平均换热系数为原来的1.5倍，在17℃生理盐水中10min时2.5min探针表面温度最低可达－160℃，大大提高了探针的冷却性能。

Usually, with the perdueterated polystyrene of molecular weight of about 250000 and disperse degree of about 3 as the materiales, the opened-cell foams with density of 0.02 g/cm3~0.1g/cm3, the average cell size of 0.2~1μm, and the deuterated ratio of more than 98% could be fabricated.

采用差式扫描量热法，动态机械性能分析仪，及万能材料机等分析测试方法对制得的氘代低密度聚苯乙烯泡沫的热性能和力学性能进行了表征分析。

The following parameters have been obtained:angular size(along the direction of the motion of the moon's center on the Sun's disk),flux density,average brightness temperature and height of the S-component sources associated with sunspots,plages and coronal condensations during the eclips.

给出日食期间日面上黑子、谱班和日冕凝聚区相应的缓变射电源的几个参数：角径、流量密度、平均亮温度与高度。

The fire risk factors are patient mobility, patient density, fire zone location, ratio of patient to attendants and average patient age .

火警风险因素为患者机动性，患者的居住密度，起火地点，患者的居住比例和患者的平均年龄。

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。