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| 1 | 凝聚度--描述与测度社会生态系统抗干扰能力的一种新特性显示文摘研究一个网络系统抵抗干扰的能力,系统科学里有'鲁棒性'的概念,社会—生态系统里用'脆弱性'、'恢复性'和'适应性'等概念.这些已有的概念是否已经全面地描述了系统抵抗干扰的能力呢?在综合灾害风险管理的实践中,整个社会凝心聚力,行动协调一致,往往发挥着至关重要的决定性作用.然而,现有学术研究中所用到的各种系统属性,都不能很好表述一个系统凝心聚力的能力或水平.鉴于此,本文提出一种全新的网络系统属性:网络凝聚度(consilience degree),专门用以度量一个如社会—生态系统一样行为的网络系统凝心聚力,行动协调一致,以抵抗干扰的能力.网络凝聚度实际上是一种更具普遍意义的'联结度'.它可以象联结度一样,派生发展出一系列的系统新属性和网络新模型,从而形成一个研究复杂系统的新的理论体系.本文将重点阐述这个体系的雏型.理论分析和仿真研究都证明:本文所提出的网络凝聚度是现有各种系统属性所无法涵盖或替代的,是研究现实复杂系统所必需的新理论工具. | 胡小兵 史培军 汪明 叶涛 LEESON Mark S | 2014 | 中国科学:信息科学2014,44,11: | 7 |
| 2 | 家禽营养研究及其未来策略显示文摘家禽企业在满足消费者需求的同时,也需要关注社会问题。无论是饲料成分的调整,还是原料成本的波动,都在家禽营养研究中得到反映。如何通过这些营养措施的调控实现家禽的最大遗传潜能将是未来研究的重点。 | Steve Leeson John D.Summers 刘蓓一(译) | 2008 | 中国家禽2008,30,18: | 6 |
| 3 | PPP模式下我国养老服务投入的经济适应性研究显示文摘本文展示了近10年PPP模式下养老服务投入的规模及构成,运用社会保障水平公式计算养老服务投入水平,通过变异系数等方法得到养老服务中政府和社会资本投入与经济发展的适应性水平,重点观察自2014年进入经济新常态时期的适应性。研究发现,近10年间养老服务中政府和社会资本投入基本适应经济发展。不过,2015年政府投入在经济发展放缓的情况下仍保持较高水平,自2016年开始滞后于经济发展。经济新常态对养老服务中社会资本投入冲击最大,适应水平并不稳定,且呈现出相较经济发展超前衰退和滞后增长交替的特征。因此,未来应调整政府投入的补贴结构,达到'降成本'的目的,通过优惠政策鼓励和倡导社会资本投入的增加,才能适应不断变化的经济形势。 | 康蕊 江华 George Leeson | 2018 | 经济问题探索2018,,9: | 4 |
| 4 | 防制霉菌毒素的实用方法显示文摘 | 潘雪男(译) 覃矜(校) Mojtaba Yegani Trevor K. Smith Steven Leeson Herman J. Boermans | 2006 | 国外畜牧学(猪与禽)2006,,4: | 3 |
| 5 | 家禽热应激显示文摘 | Steve leeson | 2002 | 中国家禽2002,24,10: | 3 |
| 6 | P2X7 receptor signaling during adult hippocampal neurogenesis显示文摘Neurogenesis is a persistent and essential feature of the adult mammalian hippocampus.Granular neurons generated from resident pools of stem or progenitor cells provide a mechanism for the formation and consolidation of new memories.Regulation of hippocampal neurogenesis is complex and multifaceted,and numerous signaling pathways converge to modulate cell proliferation,apoptosis,and clearance of cellular debris,as well as synaptic integration of newborn immature neurons.The expression of functional P2X7 receptors in the central nervous system has attracted much interest and the regulatory role of this purinergic receptor during adult neurogenesis has only recently begun to be explored.P2X7 receptors are exceptionally versatile:in their canonical role they act as adenosine triphosphate-gated calcium channels and facilitate calcium-signaling cascades exerting control over the cell via calcium-encoded sensory proteins and transcription factor activation.P2X7 also mediates transmembrane pore formation to regulate cytokine release and facilitate extracellular communication,and when persistently stimulated by high extracellular adenosine triphosphate levels large P2X7 pores form,which induce apoptotic cell death through cytosolic ion dysregulation.Lastly,as a scavenger receptor P2X7 directly facilitates phagocytosis of the cellular debris that arises during neurogenesis,as well as during some disease states.Understanding how P2X7 receptors regulate the physiology of stem and progenitor cells in the adult hippocampus is an important step towards developing useful therapeutic models for regenerative medicine.This review considers the relevant aspects of adult hippocampal neurogenesis and explores how P2X7 receptor activity may influence the molecular physiology of the hippocampus,and neural stem and progenitor cells. | Hannah C. Leeson Tailoi Chan-Ling Michael D. Lovelace Jeremy C. Brownlie Ben J. Gu Michael W. Weible II | 2019 | Neural Regeneration Research2019,14,10: | 3 |
| 7 | 营养在保证禽产品质量中的作用显示文摘 | STEVE LEESON 田玮 赵改名 | 2000 | 国外畜牧科技2000,27,4: | 2 |
| 8 | 饲养密度可能限制肉鸡采食量(续完)显示文摘3鸡场中的采食活动
肉鸡仍然是为能量而进行采食的,因此饲料的能量浓度将影响其采食量。如果大龄肉鸡可完全自由接近料槽,当饲料的代谢能为2650~3250kcal/kg(约11.0~13.5MJ/kg)时,能量摄入量几乎不受影响;如果饲料的能量密度进行调整,生长速度也几乎不受影响。 | 万建美 孙相俞 Steve Leeson | 2011 | 国外畜牧学(猪与禽)2011,,4: | 2 |
| 9 | Abacavir sulfate显示文摘 | Graul A Leeson P A | 1998 | Drugs of Future1998,23,11: | 1 |
| 10 | Effect of dietary protein and energyon broiler carcasec composition and efficiency of nutrient utilization显示文摘 | Jackson S Summers J D Leeson S | 1982 | Poultry Science1982,61,: | 1 |
| 11 | Effect of phytase enzyme on dietary nitrogen-corrected apparent metabolizable energy and the ileal digestibility of nitrogen and amino acids 显示文摘 | Namkung H Leeson S | 1999 | Poultry Science1999,78,: | 1 |
| 12 | Measurement of metabolizable energy in poultry feeds by an in vitro system显示文摘 | VALDES E V LEESON S | 1992 | Poultry Science1992,71,: | 1 |
| 13 | Feathering in commercial poultry I:Feather growth and composition 显示文摘 | Leeson S Walsh T | 2004 | World''s Poultry Science Journal2004,60,: | 1 |
| 14 | Quantitative and qualitative feed restriction on growth characteristics of male broiler chickens显示文摘 | Urdaneta-Rincon M Leeson S | 2002 | Poult Sci2002,81,: | 1 |
| 15 | Quantitative and quali- tative feed restriction on growth characteristics of male broiler chickens 显示文摘 | Urdaneta-Rincon M Leeson S | 2002 | Poultry Science2002,,81: | 1 |
| 16 | Response of laying hens to supplemental niacin显示文摘 | LEESON S CASTON L J SUMMERS J D | 1991 | Poultry Science1991,70,5: | 1 |
| 17 | 植酸酶对肉鸡生产性能及氮消化率的影响显示文摘在肉禽日粮中添加植酸酶不仅可提高磷和锌的利用率,还可提高回肠中氮和氨基酸的消化率和表观代谢能。试验的目的是研究植酸酶日粮饲喂肉鸡对代谢能、回肠氮和氨基酸消化率的影响。 | H Namkung S Leeson 李峰娟 王志祥 高树华 | 2010 | 饲料研究2010,33,7: | 1 |
| 18 | Laying hen performance as influenced by protein intake to sixteen weeks of age and body weight at point of lay显示文摘 | Leeson S | 1994 | J Poultry Sci1994,73,: | 1 |
| 19 | In vitro estimation of dry matter and crude protein digestibility显示文摘 | CLUNIES M LEESON S | 1984 | Poultry Science1984,63,: | 1 |
| 20 | Feathering in commercial poultry II : Factors influencing feather growth and feather loss 显示文摘 | Leeson S Walsh T | 2004 | World''s Poultry Science Journal2004,60,: | 1 |