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- An average density of P. emarginata per square meter was 10.65 in 20 workshop, but P. americana was 38.50 only in 8 workshops. 而美洲大蠊仅见于8个车间;聚集性较强;平均密度达38.;50只/m~2。
- In 385 years, the average density of population would be l8 600/km2 over land and sea both.That would be by about 2320 A.D. 385年后,无论在海面还是陆地,平均人口密度都将是每平方公里18600人,这是公元2320年的事。
- But the maximum occurrence of H. assulta, H. armigera and S. litura was in the mid-August, the average density was 3.9 and 3.0 per plant, respectively. 斜纹夜蛾、烟青虫和棉铃虫幼虫的发生高峰期均在8月中旬,平均每株虫量3.;9头、斜纹夜蛾3
- In the Friedmann models, the answer is tied to the average density of matter: a high-density universe will collapse, whereas a low-density universe will expand eternally. 在佛里特曼的模型中,这个问题的答案和物质的平均密度有关:高密度的宇宙会塌陷,而低密度的宇宙则会持续膨胀。
- The effect of interface undulations on the geoid in China and its adjacent regions is calculated on the basis of the average density differences of the interfaces in this paper. 结合中国及邻区的数据,利用界面上下的平均密度差,计算了物质界面起伏对大地水准面的影响,发现莫霍界面的影响占地形质量影响的70%25左右,验证了均衡补偿理论。
- In terms of annual average density, the dominant Cyclopoida were Mesocyclops nortius, Cyclops vincinus vincinus and Thermocyclops Thermocyclops brevifurcatus, and meanwhile Neodiaptomus yantsekiangensis and Sinocalanus dorrii dominated the Calanoida. 根据年平均密度,剑水蚤的优势种为:Mesocyclops notius,Cyclops vincinuis vincinus和Thermocyclops brevifurcatus,而哲水蚤的优势种为Meodiaptomus yantsekiangensis和Sinocalanus dorrii。
- Doba Crude Oil has the highest average density,923.6kg/m3,whereas Marib Crude Oil has the lowest one,793.7 kg/m3.Arabian Middle Crude Oil has the highest sulfur content,2.56%(m/m),whereas Bach Ho crude Oil has the lowest one,0.043%(m/m). 其中进口原油最大平均密度值是乍得(DOBA)原油;为923.;6kg/m3;最小平均密度值是也门(MARIB)原油;为793
- By computing each density of class in training set and the average density of the whole training set, some samples in the high-density class can be deleted using the training samples reduction method. 通过计算训练样本集中各类别的类别密度及整个训练集的平均密度,去掉高密度类别中的部分样本; 渐进式分类模式模拟人工分类文本的智能化形式,分为按标题分类、按关键段落分类和按全文分类三个层次,尽量减少分析全文的比例。
- During 1999 to 2004, the monthly average density of Norway rat, the major species, in Taizhou urban was 1.00 to 2.33 precent by powder mark, 0.13 to 0.85 precent by mouse jam and 0.28 to 1.33 precent by bait-stealing method. 台州城区以褐家鼠为优势鼠种;1999~2004年月平均鼠密度粉迹法为1.;00%25~2
- Average density of major pollutants in Fuxin City, Liaoning Province was calculated by establishing an air pollution density model based on classification of atmospheric pollution source. 通过对阜新市的大气污染源的分类建立了大气污染的浓度模型,给出了主要污染物的平均污染浓度的计算结果;
- Results There were 6 species parasitical fleas in Rattus flavipectus,it s annual average density,infection rate of fleas,index of Xenopsylla cheopis were 4.09%,43.13% and 1.0982 respectively. 结果合浦县黄胸鼠体表共有寄生蚤6种;年平均鼠密度为4.;09%25;平均染蚤率为43
- Results: There were 3 species parasitical fleas in Rattus losea,it s annual average density,infected with fleas,index of Nosopsyllus wualis and Xenopsylla Cheopis were 6.86%,14.14%,0.1611 and 0.0713. 结果:合浦县黄毛鼠体共有3种寄生蚤;年平均鼠密度为6.;86%25;平均染蚤率为14
- Both the average density of bubble fluid above the pump intake and flowing pressure can be obtained using the theory of Newton mechanics, hydraulics and kinematics.The method ha... 利用牛顿力学、水力学、运动学原理,计算出泵吸入口以上泡沫流体平均密度和流压,并应用于实际生产及二流量试井,取得了好的效果。
- This idea would explain why the geologically active region is exactly at the south pole: a warm region, with lower than average density, will naturally drift toward the axis of rotation. 这个理论可以解释地质活动区域为何正好位于南极,因为温暖且密度低于平均值的区域,会自然漂浮到旋转轴附近。
- The tube-insert can be filled with liquid or other substance to make its average density equal to the flowing fluid in heat transfer tubes, thus it can float and spin concentrically with axis. 通过理论计算研究,得到了外螺旋塑料管动力矩计算式,按此得到结构设计的基本原则。
- In the crust, the average density of the northern margin of the Tarim basin and the southern margin of the Junggar basin is relatively high, while that of the Tianshan orogenic belt is relatively low. 在地壳范围内,塔里木盆地北缘与准噶尔盆地南缘的平均密度较高,天山造山带的地壳平均密度较低。
- We then insert this average density into Einstein's equations for gravity and determine the averaged expansion rate of the universe. 然后将平均密度带入按因斯坦重力方程来确定宇宙的平均膨胀速率。
- The average age of the boys in this class is fifteen. 本班男生的平均年龄是十五岁。
- The average output of the factory is 20 cars a day. 该工厂的平均产量是每天20辆汽车。
- His income is well below the average. 他的收入大大低于平均水平。