联令正态方程和其内切线方程可得到一个超越方程,应用二分法和计算机解此超越方程可得到一个解,并命名为定比平方参数 z。结果表明:z=2.51286280;内切线斜率可描述正态曲线的平坦程度;由正态曲线的2个内切线和 x 轴共组三角形的面积可...联令正态方程和其内切线方程可得到一个超越方程,应用二分法和计算机解此超越方程可得到一个解,并命名为定比平方参数 z。结果表明:z=2.51286280;内切线斜率可描述正态曲线的平坦程度;由正态曲线的2个内切线和 x 轴共组三角形的面积可约占正态曲线与 x 轴之间面积的88%;正态曲线上的切点和拐点不重合,是曲线连续的两个临界点;纵切比常数和纵拐比常数从理论上证明了采伐强度在30%左右时最好,最大不能起过50%。展开更多
Restriction fragment length polymorphism （RFLP） profiles of the amplified products of Internal Transcribed Spacer （ITS） region of rDNA using four restriction enzymes （Alul, Rsal, HinfI and HhaI） revealed distinc...Restriction fragment length polymorphism （RFLP） profiles of the amplified products of Internal Transcribed Spacer （ITS） region of rDNA using four restriction enzymes （Alul, Rsal, HinfI and HhaI） revealed distinctness of six Indian isolates of Steinernema one each from Maharashtra （IARI-EPN-mh）, Himachal Pradesh （IARI-EPN-hp）, Dehradun （IARI-EPN-dhdl）, Jharkhand （IARI-EPN-jhl） and two from Madhya Pradesh （IARI-EPN-bpll ＆ IARI-EPN-gwll）, when compared with the only native species Steinernema thermophilum. One of the restriction enzyme, Rsal could differentiate all the six species/strains from one another. The three restriction enzymes yielded patterns which were of diagnostic value but Rsal appeared to be the best diagnostic marker for differentiating these isolates. A tree constructed based upon the band sharing amongst the isolates, produced trichotomy which placed strains from Madhya Pradesh and Jharkhand in one group showing 94% homology, one strain from Bhopal （M.P） formed separate clade along with S. thermophilum with 72% similarity. These isolates, from Maharashtra, Himachal Pradesh and Dehradun, showed only 51% similarity with the S. thermophilum by forming separate clade.展开更多
Previous studies have shown that children learn from educational television; however, these studies have not explored how closely the educational content of the program is integrated to the narrative. The following st...Previous studies have shown that children learn from educational television; however, these studies have not explored how closely the educational content of the program is integrated to the narrative. The following study uses a systematic content analysis of 100 top-rated U.S. children＇s television programs to explore the tangential relationship （i.e., distance） of narrative and educational content through the lens of the capacity model--which is built upon three basic components： narrative content, educational content, and the distance between them. Programs were analyzed for distance by examining lesson clarity and integration, show type, target audience age, and station type. One-way ANOVAs indicates significant differences between the means of these variables. Programs targeting younger children presented educational content that was closely integrated into the plotline of the program and helped further the story. However, as the target audience aged, the educational content became more tangential to the narrative content and was less tied to the plotline of the program.展开更多
文摘联令正态方程和其内切线方程可得到一个超越方程,应用二分法和计算机解此超越方程可得到一个解,并命名为定比平方参数 z。结果表明:z=2.51286280;内切线斜率可描述正态曲线的平坦程度;由正态曲线的2个内切线和 x 轴共组三角形的面积可约占正态曲线与 x 轴之间面积的88%;正态曲线上的切点和拐点不重合,是曲线连续的两个临界点;纵切比常数和纵拐比常数从理论上证明了采伐强度在30%左右时最好,最大不能起过50%。
文摘Restriction fragment length polymorphism （RFLP） profiles of the amplified products of Internal Transcribed Spacer （ITS） region of rDNA using four restriction enzymes （Alul, Rsal, HinfI and HhaI） revealed distinctness of six Indian isolates of Steinernema one each from Maharashtra （IARI-EPN-mh）, Himachal Pradesh （IARI-EPN-hp）, Dehradun （IARI-EPN-dhdl）, Jharkhand （IARI-EPN-jhl） and two from Madhya Pradesh （IARI-EPN-bpll ＆ IARI-EPN-gwll）, when compared with the only native species Steinernema thermophilum. One of the restriction enzyme, Rsal could differentiate all the six species/strains from one another. The three restriction enzymes yielded patterns which were of diagnostic value but Rsal appeared to be the best diagnostic marker for differentiating these isolates. A tree constructed based upon the band sharing amongst the isolates, produced trichotomy which placed strains from Madhya Pradesh and Jharkhand in one group showing 94% homology, one strain from Bhopal （M.P） formed separate clade along with S. thermophilum with 72% similarity. These isolates, from Maharashtra, Himachal Pradesh and Dehradun, showed only 51% similarity with the S. thermophilum by forming separate clade.
文摘Previous studies have shown that children learn from educational television; however, these studies have not explored how closely the educational content of the program is integrated to the narrative. The following study uses a systematic content analysis of 100 top-rated U.S. children＇s television programs to explore the tangential relationship （i.e., distance） of narrative and educational content through the lens of the capacity model--which is built upon three basic components： narrative content, educational content, and the distance between them. Programs were analyzed for distance by examining lesson clarity and integration, show type, target audience age, and station type. One-way ANOVAs indicates significant differences between the means of these variables. Programs targeting younger children presented educational content that was closely integrated into the plotline of the program and helped further the story. However, as the target audience aged, the educational content became more tangential to the narrative content and was less tied to the plotline of the program.
