反应堆物理设计不确定度是第4代核能系统的QMU(quantification of margins and uncertainties)有效性认证所必须的参数之一,核数据不确定度是其重要来源。基于自主开发的耦合程序BUND(burnup uncertainty of nuclear data),将SCALE程序T...反应堆物理设计不确定度是第4代核能系统的QMU(quantification of margins and uncertainties)有效性认证所必须的参数之一,核数据不确定度是其重要来源。基于自主开发的耦合程序BUND(burnup uncertainty of nuclear data),将SCALE程序TRITON和TSUNAMI-3D模块耦合,完成了熔盐堆钍铀燃料循环、铀钚燃料循环核数据引起的有效增殖因数keff不确定度分析,并与ENDF/B-Ⅶ.1协方差数据库计算结果进行了对比。结果显示:初始时刻,两种燃料循环模式下,核数据导致的keff不确定度分别为0.490%和0.582%。随燃耗的增加,核数据引起的keff不确定度增加。寿期末,两种燃料循环模式下,对keff不确定度影响显著增加的反应道分别为239Pu(nubar)、(n,f)、(n,γ)、105 Rh(n,γ)、135 Xe(n,γ)和234 U(n,γ)、143 Nd(n,γ)、131,135 Xe(n,γ)等。展开更多
Indoor rearing observation and efficacy test of insecticides were conducted in 2010 to understand the biochemical characteristics of Drosophila rnelano-gaster and high efficient insecticides against the insect pest. T...Indoor rearing observation and efficacy test of insecticides were conducted in 2010 to understand the biochemical characteristics of Drosophila rnelano-gaster and high efficient insecticides against the insect pest. The results showed that D. melanogaster had preference to eight kinds of fruits with proliferation. Fe-male adults of D. melanogaster laid eggs under epidermis of cherry fruits and newly hatched larvae caused damage on fruits. When the temperatures were （ 18 ±2） ℃ and （ 23 ± 2 ） ℃, the egg stage was 2.4 - 3.0 and 1.2 - 1.8 d ; the larval stage was 11.2 - 12.2 and 5.6 - 6.5 d; the papal stage was 9.5 - 10.6 and 5.0 - 6.2 d ; one generation was 23.1 - 25.4 and 12.8 - 14.2 d, respectively. Four insecticides （ including 1% emamectin benzoate EC 3 000 times dilution, 90% crys- tal trichlorfon 1 000 times dilution, 40% phoxim EC 1 500 times dilution and 25% buprofezin WP 2 000 times dilution） had higher control effects against D. mela-nogaster, with mortalities of 85.00% - 100.00%, 96.67% - 100.00% and 100.00% after insecticide application for 1, 3 and 6 h, respectively.展开更多
文摘反应堆物理设计不确定度是第4代核能系统的QMU(quantification of margins and uncertainties)有效性认证所必须的参数之一,核数据不确定度是其重要来源。基于自主开发的耦合程序BUND(burnup uncertainty of nuclear data),将SCALE程序TRITON和TSUNAMI-3D模块耦合,完成了熔盐堆钍铀燃料循环、铀钚燃料循环核数据引起的有效增殖因数keff不确定度分析,并与ENDF/B-Ⅶ.1协方差数据库计算结果进行了对比。结果显示:初始时刻,两种燃料循环模式下,核数据导致的keff不确定度分别为0.490%和0.582%。随燃耗的增加,核数据引起的keff不确定度增加。寿期末,两种燃料循环模式下,对keff不确定度影响显著增加的反应道分别为239Pu(nubar)、(n,f)、(n,γ)、105 Rh(n,γ)、135 Xe(n,γ)和234 U(n,γ)、143 Nd(n,γ)、131,135 Xe(n,γ)等。
基金Supported by Science and Technology Project of Guiyang City "Research and Demonstration of Key Technology for Characteristic Fruit Industry in Guiyang City" (ZKNZ[2007]17)
文摘Indoor rearing observation and efficacy test of insecticides were conducted in 2010 to understand the biochemical characteristics of Drosophila rnelano-gaster and high efficient insecticides against the insect pest. The results showed that D. melanogaster had preference to eight kinds of fruits with proliferation. Fe-male adults of D. melanogaster laid eggs under epidermis of cherry fruits and newly hatched larvae caused damage on fruits. When the temperatures were （ 18 ±2） ℃ and （ 23 ± 2 ） ℃, the egg stage was 2.4 - 3.0 and 1.2 - 1.8 d ; the larval stage was 11.2 - 12.2 and 5.6 - 6.5 d; the papal stage was 9.5 - 10.6 and 5.0 - 6.2 d ; one generation was 23.1 - 25.4 and 12.8 - 14.2 d, respectively. Four insecticides （ including 1% emamectin benzoate EC 3 000 times dilution, 90% crys- tal trichlorfon 1 000 times dilution, 40% phoxim EC 1 500 times dilution and 25% buprofezin WP 2 000 times dilution） had higher control effects against D. mela-nogaster, with mortalities of 85.00% - 100.00%, 96.67% - 100.00% and 100.00% after insecticide application for 1, 3 and 6 h, respectively.
