基于耦合模式比较计划第6阶段(CMIP6)中的全球气候模式的模拟结果,采用考虑模式性能和独立性结合(Climate model Weighting by Independence and Performance,ClimWIP)的加权方案进行中国区域气候的多模式集合预估及不确定性研究。结果...基于耦合模式比较计划第6阶段(CMIP6)中的全球气候模式的模拟结果,采用考虑模式性能和独立性结合(Climate model Weighting by Independence and Performance,ClimWIP)的加权方案进行中国区域气候的多模式集合预估及不确定性研究。结果表明,ClimWIP方案在历史阶段的模拟优于等权重方案,降低了多模式模拟的气候态偏差。温度指数的未来预估不确定性较大的区域主要集中在中国北方和青藏高原,而降水指数主要集中在华北和西北地区。ClimWIP方案的预估不确定性与等权重方案相比有所降低。ClimWIP方案预估的温度指数的增温大值区主要集中在中国北方和青藏高原;降水指数在西北和青藏高原增加最为显著。全球额外0.5℃增暖时,中国区域平均的温度指数变化更强,平均高于全球0.2℃,最低温在东北部分地区的额外增温甚至是全球平均的3倍;总降水额外增加5.2%;强降水额外增加10.5%。全球增暖2℃下,中国大部分区域温度指数较当前气候态增加可能超过1.5℃(概率>50%),在中国北方和青藏高原的部分地区增温超过1.5℃的可能性更大(概率>90%);总降水,强降水和连续干日在西北和华北增加幅度有可能超过10%、25%和-5 d(概率>50%)。展开更多
For a graph G=(V,E),a Roman{2}-dominating function f:V→{0,1,2}has the property that for every vertex v∈V with f(v)=0,either v is adjacent to at least one vertex u for which f(u)=2,or at least two vertices u1 and u2 ...For a graph G=(V,E),a Roman{2}-dominating function f:V→{0,1,2}has the property that for every vertex v∈V with f(v)=0,either v is adjacent to at least one vertex u for which f(u)=2,or at least two vertices u1 and u2 for which f(u1)=f(u2)=1.A Roman{2}-dominating function f=(V0,V1,V2)is called independent if V1∪V2 is an independent set.The weight of an independent Roman{2}-dominating function f is the valueω(f)=Σv∈V f(v),and the independent Roman{2}-domination number i{R2}(G)is the minimum weight of an independent Roman{2}-dominating function on G.In this paper,we characterize all trees with i{R2}(T)=γ(T)+1,and give a linear time algorithm to compute the value of i{R2}(T)for any tree T.展开更多
目的探讨院校-社区联合开展中医养生保健在老年2型糖尿病患者中的应用效果。方法选取2020年8月至2021年7月扬州市中医院收治的84例老年2型糖尿病患者作为研究对象,按照随机数字表法分为对照组(42例)和干预组(42例)。对照组患者采用常规...目的探讨院校-社区联合开展中医养生保健在老年2型糖尿病患者中的应用效果。方法选取2020年8月至2021年7月扬州市中医院收治的84例老年2型糖尿病患者作为研究对象,按照随机数字表法分为对照组(42例)和干预组(42例)。对照组患者采用常规治疗护理,干预组患者在常规治疗护理的基础上采用院校-社区联合开展中医养生保健社会实践方法。比较两组患者的遵医依从率、血糖水平、并发症发生率及生活质量。结果干预组患者的按时按量服药、血糖水平监测、合理饮食、适量运动遵医依从率高于对照组,差异有统计学意义(P<0.05)。干预组患者干预后的空腹血糖(FBG)、餐后2 h血糖(2 h PBG)及糖化血红蛋白(HbA1c)水平均低于对照组,差异有统计学意义(P<0.05)。干预组患者的并发症总发生率低于对照组,差异有统计学意义(P<0.05)。干预组患者干预后的生活质量综合评定问卷各维度评分均高于对照组,差异有统计学意义(P<0.05)。结论院校-社区联合实施的中医养生保健对老年2型糖尿病患者进行干预,可有效提高其遵医依从性,有助于控制血糖水平,减少并发症的发生,提高生活质量。展开更多
In this paper, the authors generalize the definition of χ 2 distribution and introduce a quasi χ 2 distribution, and then prove several properties of it, find the necessary and sufficient conditions of i...In this paper, the authors generalize the definition of χ 2 distribution and introduce a quasi χ 2 distribution, and then prove several properties of it, find the necessary and sufficient conditions of independence about multivariate normal distributions, matrix normal distributions and two parts of the Wishart distribution.展开更多
A subset D■V(G)in a graph G is a dominating set if every vertex in V(G)I D is adjacent to at least one vertex of S.A subset S■V(G)in a graph G is a 2-independent set if△(G[S])<2.The 2-independence numberα2(G)is...A subset D■V(G)in a graph G is a dominating set if every vertex in V(G)I D is adjacent to at least one vertex of S.A subset S■V(G)in a graph G is a 2-independent set if△(G[S])<2.The 2-independence numberα2(G)is the order of a largest 2-independent set in G.Further,a subset D■V(G)in a graph G is a 2-independent dominating set if D is both dominating and 2-independent.The 2-independent domination number i^(2)(G)is the order of a smallest 2-independent dominating set in G.In this paper,we characterize all trees T of order n with i^(2)(T)=n/2.Moreover,we prove that for any tree T of order n≥2,i^(2)(T)≤2/3α2(T),and this bound is sharp.展开更多
文摘基于耦合模式比较计划第6阶段(CMIP6)中的全球气候模式的模拟结果,采用考虑模式性能和独立性结合(Climate model Weighting by Independence and Performance,ClimWIP)的加权方案进行中国区域气候的多模式集合预估及不确定性研究。结果表明,ClimWIP方案在历史阶段的模拟优于等权重方案,降低了多模式模拟的气候态偏差。温度指数的未来预估不确定性较大的区域主要集中在中国北方和青藏高原,而降水指数主要集中在华北和西北地区。ClimWIP方案的预估不确定性与等权重方案相比有所降低。ClimWIP方案预估的温度指数的增温大值区主要集中在中国北方和青藏高原;降水指数在西北和青藏高原增加最为显著。全球额外0.5℃增暖时,中国区域平均的温度指数变化更强,平均高于全球0.2℃,最低温在东北部分地区的额外增温甚至是全球平均的3倍;总降水额外增加5.2%;强降水额外增加10.5%。全球增暖2℃下,中国大部分区域温度指数较当前气候态增加可能超过1.5℃(概率>50%),在中国北方和青藏高原的部分地区增温超过1.5℃的可能性更大(概率>90%);总降水,强降水和连续干日在西北和华北增加幅度有可能超过10%、25%和-5 d(概率>50%)。
基金Supported by National Natural Science Foundation of China(Grant No.12171440)。
文摘For a graph G=(V,E),a Roman{2}-dominating function f:V→{0,1,2}has the property that for every vertex v∈V with f(v)=0,either v is adjacent to at least one vertex u for which f(u)=2,or at least two vertices u1 and u2 for which f(u1)=f(u2)=1.A Roman{2}-dominating function f=(V0,V1,V2)is called independent if V1∪V2 is an independent set.The weight of an independent Roman{2}-dominating function f is the valueω(f)=Σv∈V f(v),and the independent Roman{2}-domination number i{R2}(G)is the minimum weight of an independent Roman{2}-dominating function on G.In this paper,we characterize all trees with i{R2}(T)=γ(T)+1,and give a linear time algorithm to compute the value of i{R2}(T)for any tree T.
文摘目的探讨院校-社区联合开展中医养生保健在老年2型糖尿病患者中的应用效果。方法选取2020年8月至2021年7月扬州市中医院收治的84例老年2型糖尿病患者作为研究对象,按照随机数字表法分为对照组(42例)和干预组(42例)。对照组患者采用常规治疗护理,干预组患者在常规治疗护理的基础上采用院校-社区联合开展中医养生保健社会实践方法。比较两组患者的遵医依从率、血糖水平、并发症发生率及生活质量。结果干预组患者的按时按量服药、血糖水平监测、合理饮食、适量运动遵医依从率高于对照组,差异有统计学意义(P<0.05)。干预组患者干预后的空腹血糖(FBG)、餐后2 h血糖(2 h PBG)及糖化血红蛋白(HbA1c)水平均低于对照组,差异有统计学意义(P<0.05)。干预组患者的并发症总发生率低于对照组,差异有统计学意义(P<0.05)。干预组患者干预后的生活质量综合评定问卷各维度评分均高于对照组,差异有统计学意义(P<0.05)。结论院校-社区联合实施的中医养生保健对老年2型糖尿病患者进行干预,可有效提高其遵医依从性,有助于控制血糖水平,减少并发症的发生,提高生活质量。
文摘In this paper, the authors generalize the definition of χ 2 distribution and introduce a quasi χ 2 distribution, and then prove several properties of it, find the necessary and sufficient conditions of independence about multivariate normal distributions, matrix normal distributions and two parts of the Wishart distribution.
基金the National Natural Science Foundation of China(No.12061073).
文摘A subset D■V(G)in a graph G is a dominating set if every vertex in V(G)I D is adjacent to at least one vertex of S.A subset S■V(G)in a graph G is a 2-independent set if△(G[S])<2.The 2-independence numberα2(G)is the order of a largest 2-independent set in G.Further,a subset D■V(G)in a graph G is a 2-independent dominating set if D is both dominating and 2-independent.The 2-independent domination number i^(2)(G)is the order of a smallest 2-independent dominating set in G.In this paper,we characterize all trees T of order n with i^(2)(T)=n/2.Moreover,we prove that for any tree T of order n≥2,i^(2)(T)≤2/3α2(T),and this bound is sharp.
