排序方式: 共有4条查询结果,搜索用时 31 毫秒
1
1.
2.
随机模糊环境下企业动态生产计划编制 总被引:7,自引:0,他引:7
企业面对多变的内外部条件,处于动态、随机、模糊环境下。在这种环境下,企业如何决策自己的发展规划,制定合理的计划,并确保计划目标的实现,是一个关键的问题。应用多阶段决策理论,结合随机与模糊理论,构造了企业多阶段动态发展模型,建立了全状态转移矩阵,提出了随机熵权等概念,并对典型的动态发展与随机模糊企业系统--煤矿企业系统进行生产接续计划的编制,力争对多阶段决策理论和随机模糊理论的发展有所贡献。 相似文献
3.
A recurrent mutation in PALB2 in Finnish cancer families 总被引:1,自引:0,他引:1
Erkko H Xia B Nikkilä J Schleutker J Syrjäkoski K Mannermaa A Kallioniemi A Pylkäs K Karppinen SM Rapakko K Miron A Sheng Q Li G Mattila H Bell DW Haber DA Grip M Reiman M Jukkola-Vuorinen A Mustonen A Kere J Aaltonen LA Kosma VM Kataja V Soini Y Drapkin RI Livingston DM Winqvist R 《Nature》2007,446(7133):316-319
BRCA1, BRCA2 and other known susceptibility genes account for less than half of the detectable hereditary predisposition to breast cancer. Other relevant genes therefore remain to be discovered. Recently a new BRCA2-binding protein, PALB2, was identified. The BRCA2-PALB2 interaction is crucial for certain key BRCA2 DNA damage response functions as well as its tumour suppression activity. Here we show, by screening for PALB2 mutations in Finland that a frameshift mutation, c.1592delT, is present at significantly elevated frequency in familial breast cancer cases compared with ancestry-matched population controls. The truncated PALB2 protein caused by this mutation retained little BRCA2-binding capacity and was deficient in homologous recombination and crosslink repair. Further screening of c.1592delT in unselected breast cancer individuals revealed a roughly fourfold enrichment of this mutation in patients compared with controls. Most of the mutation-positive unselected cases had a familial pattern of disease development. In addition, one multigenerational prostate cancer family that segregated the c.1592delT truncation allele was observed. These results indicate that PALB2 is a breast cancer susceptibility gene that, in a suitably mutant form, may also contribute to familial prostate cancer development. 相似文献
4.
SONG Hua-ling ZHAI Cong-min LIU Li-juan .School of management Hebei University of Technology Cornelis Reiman Tianjin China Department of Management Monash University Australia .School of management Hebei University of T 《系统科学与系统工程学报(英文版)》2000,(3)
1 High entropyEngineeringSystemTheoriesofcomplexengineeringsystem ,complexandhugesystemsorman machine environ mentsystem ,whichareintegratedandinterdisciplinarysubjects ,werebeingdevelopedrecent ly .Itismainlybecauseofthesocializationofproduction ,complexity… 相似文献
1