Through theoretical analysis of reliability and simulation analysis of dispersivi of d a/ d N based on Monte Carlo method, the distribution function of n and c was set up. Meanwhile, the distribution of critical ...Through theoretical analysis of reliability and simulation analysis of dispersivi of d a/ d N based on Monte Carlo method, the distribution function of n and c was set up. Meanwhile, the distribution of critical opening displacement(COD)δ c was defined by the use of coherent coefficient method, and the probabilistic model of defects assessment of military special vessel was built. Thereby the theoretical and practical fundamental research on evaluation of reliability of military high pressure vessels was carried out.展开更多
The study on developing the reasonable safety monitoring indexes plays a most importantly role in the health monitoring of high core rockfill dams. However, researches on this topic are relatively scarce both at home ...The study on developing the reasonable safety monitoring indexes plays a most importantly role in the health monitoring of high core rockfill dams. However, researches on this topic are relatively scarce both at home and abroad. In this paper, the characteristics and failure modes of seepage in high core rockfill dam are analyzed firstly. Then, a safety monitoring index based on seepage quantity, which reflects the overall seepage behavior, is developed, using the real-time monitoring data and its safety monitoring model. Moreover, another safety monitoring index based on seepage gradient, reflecting the local seepage behavior, is proposed, combining the spatial layout of osmo- meters and local failure mechanisms of core wall. Additionally, one more safety monitoring index based on permeability coefficient, which considers the overall and local seepage behaviors, is developed, on the basis of establishing the finite element analysis model and real-time seepage coefficient inversion analysis model of high core rockfill dam. A case study on these indexes of Nuozhadu high core rockfill dam is developed, which improves the reliability of seepage safety evaluation of the dam.展开更多
[Objective] This study was conducted to select new hybrids with good ex- tension prospect, and to comprehensive assess various varieties and combinations from yielding ability, yield stability and adaptability. [Metho...[Objective] This study was conducted to select new hybrids with good ex- tension prospect, and to comprehensive assess various varieties and combinations from yielding ability, yield stability and adaptability. [Method] The yielding ability and yield stability of 5 varieties and 2 pioneer combinations in 5 test locations in Jiang- su Province in 2013-2015 were analyzed comprehensively. [Result] The environment effects and genotype x environment interaction effects of various tested varieties differed very significantly. It could be seen from various test locations that Mingyu 1301 and Sushi 51417 had very good yielding ability and yield stability, and were comprehensively assessed to be very good, Suyu 41 had very good yield stability and better yielding ability, and was comprehensively assessed to be good, while Suyu 29 and Suyu 39 showed instable yields in various locations and were greatly affected by environment, and thus should be planted in carefully-selected areas in extension. [Conclusion] This study provides theoretical foundation for breeding and extension of new varieties.展开更多
为探索新疆绿洲农田生态条件下气候因素对大豆生长的影响,2006、2007两年进行了大豆超高产栽培研究,产量分别达到5695.2kg.hm-2和4666.5kg.hm-2。分析2007年产量低的原因,发现在基本同样的栽培条件下,不同年份间大豆的群体主要生理参数...为探索新疆绿洲农田生态条件下气候因素对大豆生长的影响,2006、2007两年进行了大豆超高产栽培研究,产量分别达到5695.2kg.hm-2和4666.5kg.hm-2。分析2007年产量低的原因,发现在基本同样的栽培条件下,不同年份间大豆的群体主要生理参数存在较大差异。2007年最大叶面积指数(Maximum area leaf index LAImax)为3.79,显著低于2006年的5.31;光合势在大豆生长的中后期也显著低于2006年,籽粒所占植株干物质的比例为35.6%,比2006年的38.0%低2.4个百分点。从产量构成因素的差异可以看出,单株荚数和单株粒数少是导致2007年产量低的主要原因。结果显示:2007日照时数的减少造成大豆叶片提前变黄、脱落,LAImax的显著降低,增加落花落荚,降低经济系数,导致减产。新疆大豆超高产栽培在加大水肥投入和增加密度上受到光照时间和光辐射量的限制。展开更多
文摘Through theoretical analysis of reliability and simulation analysis of dispersivi of d a/ d N based on Monte Carlo method, the distribution function of n and c was set up. Meanwhile, the distribution of critical opening displacement(COD)δ c was defined by the use of coherent coefficient method, and the probabilistic model of defects assessment of military special vessel was built. Thereby the theoretical and practical fundamental research on evaluation of reliability of military high pressure vessels was carried out.
文摘The study on developing the reasonable safety monitoring indexes plays a most importantly role in the health monitoring of high core rockfill dams. However, researches on this topic are relatively scarce both at home and abroad. In this paper, the characteristics and failure modes of seepage in high core rockfill dam are analyzed firstly. Then, a safety monitoring index based on seepage quantity, which reflects the overall seepage behavior, is developed, using the real-time monitoring data and its safety monitoring model. Moreover, another safety monitoring index based on seepage gradient, reflecting the local seepage behavior, is proposed, combining the spatial layout of osmo- meters and local failure mechanisms of core wall. Additionally, one more safety monitoring index based on permeability coefficient, which considers the overall and local seepage behaviors, is developed, on the basis of establishing the finite element analysis model and real-time seepage coefficient inversion analysis model of high core rockfill dam. A case study on these indexes of Nuozhadu high core rockfill dam is developed, which improves the reliability of seepage safety evaluation of the dam.
基金Supported by Earmarked Fund for China Agriculture Research System(CARS-02-50)Jiangsu Agricultural Science and Technology Independent Innovation Fund(CX(14)2006)Jiangsu Science and Technology Support Program(BE2013434)~~
文摘[Objective] This study was conducted to select new hybrids with good ex- tension prospect, and to comprehensive assess various varieties and combinations from yielding ability, yield stability and adaptability. [Method] The yielding ability and yield stability of 5 varieties and 2 pioneer combinations in 5 test locations in Jiang- su Province in 2013-2015 were analyzed comprehensively. [Result] The environment effects and genotype x environment interaction effects of various tested varieties differed very significantly. It could be seen from various test locations that Mingyu 1301 and Sushi 51417 had very good yielding ability and yield stability, and were comprehensively assessed to be very good, Suyu 41 had very good yield stability and better yielding ability, and was comprehensively assessed to be good, while Suyu 29 and Suyu 39 showed instable yields in various locations and were greatly affected by environment, and thus should be planted in carefully-selected areas in extension. [Conclusion] This study provides theoretical foundation for breeding and extension of new varieties.
文摘为探索新疆绿洲农田生态条件下气候因素对大豆生长的影响,2006、2007两年进行了大豆超高产栽培研究,产量分别达到5695.2kg.hm-2和4666.5kg.hm-2。分析2007年产量低的原因,发现在基本同样的栽培条件下,不同年份间大豆的群体主要生理参数存在较大差异。2007年最大叶面积指数(Maximum area leaf index LAImax)为3.79,显著低于2006年的5.31;光合势在大豆生长的中后期也显著低于2006年,籽粒所占植株干物质的比例为35.6%,比2006年的38.0%低2.4个百分点。从产量构成因素的差异可以看出,单株荚数和单株粒数少是导致2007年产量低的主要原因。结果显示:2007日照时数的减少造成大豆叶片提前变黄、脱落,LAImax的显著降低,增加落花落荚,降低经济系数,导致减产。新疆大豆超高产栽培在加大水肥投入和增加密度上受到光照时间和光辐射量的限制。
