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For the substances studied in this work, the first principal component (PC) captures about 98 % of the variance and the second PC ～100 % of the cumulative percentage variance in the 210350 nm region.


They demonstrated that an increased risk of hospitalization for heart failure and a worsened prognosis were linked to a high cumulative percentage of ventricular stimulation.


Results with method B were only significantly lower as far as the cumulative percentage of strains "sensitive" to azlocillin, mezlocillin and piperacillin was concerned (6371%).


Thirtynine patients developed restenosis at the angioplasty site; the cumulative percentage of eventfree survival after 1 year (patency rate) was 85% in the 900mg group and 84% in the 50mg group.


The cumulative percentage of patients in complete tumor remission is now 69% for BCGCWP pretreated tumor patients and 39% for patients who underwent surgery only.

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 With 38 sample forest plots of Quanshan State Owned Forest Farm, Kuandian County as the subject of study, using mathematical equations, it was found that in a natural broadleaf mixed forest the number (N) of tree per mu against diameter class (D) curve was in the shape of an inverted "J", 'while the tree number against height (H) curve was of appr oximately normal distribution, but left slanting and gentle. It was also found that the volume (V) of stand increased with the increment in dia meter, following... With 38 sample forest plots of Quanshan State Owned Forest Farm, Kuandian County as the subject of study, using mathematical equations, it was found that in a natural broadleaf mixed forest the number (N) of tree per mu against diameter class (D) curve was in the shape of an inverted "J", 'while the tree number against height (H) curve was of appr oximately normal distribution, but left slanting and gentle. It was also found that the volume (V) of stand increased with the increment in dia meter, following the track of a power exponential equation. Average dia meter of breast height, average tree height and volume of the stand all stood at the point where 70% of the total number of tree sat, and their ranges of variation were determined.  以宽甸县泉山国营林场38块标准林地为材料,应用数学模拟方程确定子天然阔叶混交林株数(N)按径阶(D)呈反丁字型分布,林分株数按树高(H)呈近似常态分布,曲线左偏且平缓。林分平均胸径和平均树高及平均材积处于林分株数累积百分数的70％位置,并明确了它们的变动范围这对正确调查林分数量及生长预测将起重要作用。  The fragment distribution of rock, which is ground by blasting, are studied by fractal geometry It is found that there is a linear relationship between the accumulative mass percentage and the fragment size in the loglog plot, and it shows that the fragment distribution of rock has fractal structure The slope “b” in the plot can be used to calculate the relative fractal dimension “D” by the equation D=3b D may be taken as an ordered parameter, which describes the fragment distribution characteristics... The fragment distribution of rock, which is ground by blasting, are studied by fractal geometry It is found that there is a linear relationship between the accumulative mass percentage and the fragment size in the loglog plot, and it shows that the fragment distribution of rock has fractal structure The slope “b” in the plot can be used to calculate the relative fractal dimension “D” by the equation D=3b D may be taken as an ordered parameter, which describes the fragment distribution characteristics of rock The value of D reflects the scatter trend of distribution as well as the uniformity of fragments  应用分形几何理论，研究了爆炸载荷作用下岩石块度的分布特征，发现在双对数坐标下，爆破块体粒径的质量累积百分数与粒径间呈直线关系，表明其块度分布具有分形结构。根据该直线的斜率ｂ，由公式Ｄ＝３－ｂ可求得相应的分维。分维可作为描述块度分布特征的一个有序参量，其值反映了爆破块度分布的离散程度和块度的均匀程度。  The atmospheric particulates were collected in the residential area and the traffic area and the control area (the better clean area) in winter and summer using a five laminated multiple divisible impacted (the diameters of particulates are as follows:<1.1,1.1￣2.0,2.0￣3.3,3.3￣7.0, >7.0 μm connected with a big flow collecting sampler.The six kinds of polycylic aromatic hydrocarbons (PAH s) in the sample,that is Phen,Anth,Pyer,BaA,Chry and BaP,were detected by using HPLC.The follow results were obtained:1.The... The atmospheric particulates were collected in the residential area and the traffic area and the control area (the better clean area) in winter and summer using a five laminated multiple divisible impacted (the diameters of particulates are as follows:<1.1,1.1￣2.0,2.0￣3.3,3.3￣7.0, >7.0 μm connected with a big flow collecting sampler.The six kinds of polycylic aromatic hydrocarbons (PAH s) in the sample,that is Phen,Anth,Pyer,BaA,Chry and BaP,were detected by using HPLC.The follow results were obtained:1.The MMDs of these six PAH s in the particulates were all less 1 μm in winter and summer.The content of PAH s enriched in particulates which the diameters were less than 7 μm and can be inhaled was aboue 98.5% in winter and 95.5% in summer.2.Comparing with the concentration in mass/volume,the mean values of PAH s in winter were 80 times in the residential area,30 thimes in the traffic area and 18 times in the control area higher than in summer respectively,which was typical character of the pollution by coal smoke in different season.Comparing the concentration these three areas,the results in winter and summer were all that the residential area >the traffic area>the control area.3.Comparing with the percentage of the cumulative concentration in mass/volume,in these three areas the enriched degree of PAH s in the particulates which the diameters were less 7 μm is all that:the traffic area>the residential area>the control area in winter and summer,that is,because of the pollution of the automobile tail gas the enriched degree of PAH s in fine particulates in the traffic area was relatively high.  将五段多孔冲击分级器（粒径分级：＜１．１，１．１～２．０，２．０～３．３，３．３～７．０，＞７．０μｍ）与大流量采样器连接，于１９９６年冬夏两季采集呼和浩特市居民区、交通区、对照区（较清洁区）大气中的颗粒物，用高压液相色谱仪（ＨＰＬＣ）测定样品中的菲（ＰＨＥＮ）、蒽（ＡＮＴＨ）、芘（ＰＹＲＥ）、苯并〔ａ〕蒽（ＢａＡ），艹屈（ＣＨＲＹ）、苯并〔ａ〕芘（ＢａＰ）等六种多环芳烃化合物（ＰＡＨｓ）．数据表明：①这六种ＰＡＨｓ在颗粒物中的质量中值直径（ＭＭＤ），冬夏季均小于１μｍ；ＰＡＨｓ含量冬季平均有９８．５％，夏季有９５．５％富集在小于７μｍ的可吸入颗粒中；②以（质量／体积）浓度比较，冬季居民区、交通区、对照区的ＰＡＨｓ平均值分别高于夏季８０倍，３０倍和１８倍，呈典型的煤烟型污染的季节差异特征．三区浓度比较，冬夏季均居民区＞交通区＞对照区；③以（质量／体积）浓度累积百分数比较，三区７μｍ以下各级颗粒物中ＰＡＨｓ的富集度，冬夏季大多是交通区＞居民区＞对照区，即由于汽车尾气污染，交通区大气中的ＰＡＨｓ在小颗粒上的富集度相对更高些   << 更多相关文摘 
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