随着高比例新能源的接入,互联电力系统不同控制区间的电源结构差异日益增大,有些控制区新能源装机增加、常规机组减少导致调频需求增加但控制能力下降。传统联络线功率频率偏差控制(tie-line power and frequency bias control,TBC)模...随着高比例新能源的接入,互联电力系统不同控制区间的电源结构差异日益增大,有些控制区新能源装机增加、常规机组减少导致调频需求增加但控制能力下降。传统联络线功率频率偏差控制(tie-line power and frequency bias control,TBC)模式下的控制性能评价标准(control performance standard,CPS)标准,通过频率偏差系数来确定各控制区的考核阈值,却未考虑各控制区客观电源结构的影响,在高比例新能源电力系统中的不适应性日益凸显。首先分析了现有CPS标准的前提条件与内涵,揭示了CPS标准在高比例新能源电力系统中的不适应性,进而提出了控制区固有区域控制偏差(area control area,ACE)标准差的概念,利用固有ACE标准差确定考核阈值,提出了CPS标准的改进方法,并与原有CPS标准进行了对比。最后通过算例分析,验证了所提出改进标准比原有CPS标准更加公平合理。展开更多
合作问题解决(Collaborative Problem Solving,CPS)理论强调以学生为主体,引导学生通过合作协商的方式分析问题、解决问题。简要阐述了CPS理论的内涵,分析了CPS理论在小学数学教学中的应用价值,指出了基于CPS理论的小学数学教学基本流程...合作问题解决(Collaborative Problem Solving,CPS)理论强调以学生为主体,引导学生通过合作协商的方式分析问题、解决问题。简要阐述了CPS理论的内涵,分析了CPS理论在小学数学教学中的应用价值,指出了基于CPS理论的小学数学教学基本流程,提出了CPS理论在小学数学教学中的应用建议,旨在提升学生的合作能力与问题解决能力,并为广大的小学数学教育工作者开展教学提供参考。展开更多
在全球化与信息爆炸背景下,复杂问题解决(Complex Problem Solving, CPS)作为衡量个体应对动态、不确定及非透明情境能力的核心构念,已成为教育心理学领域高阶认知研究的焦点。本文系统梳理了CPS从“问题空间搜索”到“双重空间理论”...在全球化与信息爆炸背景下,复杂问题解决(Complex Problem Solving, CPS)作为衡量个体应对动态、不确定及非透明情境能力的核心构念,已成为教育心理学领域高阶认知研究的焦点。本文系统梳理了CPS从“问题空间搜索”到“双重空间理论”的理论演进,阐明了其知识获取与知识应用的双阶段认知加工特征。文章重点评述了计算机模拟微世界、形式化框架及多重复杂系统(MCS)等测评范式的更迭,并从个体差异、系统特质及发展心理学视角剖析了CPS的影响机制。尽管CPS在实证评估与干预实践中展现出显著的应用前景与生态效度,但仍面临心理测量学标准化不足、纵向追踪研究匮乏以及理论与实践转化断裂等挑战。未来研究应致力于优化测评工具的测量等价性,深化影响机制的路径分析,并强化跨学科视域下的教育干预实证研究。展开更多
Paeonia suffruticosa Andr.is an endemic shrub flower in China with 2n=10.This study used 228 cultivars from four populations,i.e.,Jiangnan,Japan,Northwest,and Zhongyuan,as materials to explore the genetic diversity le...Paeonia suffruticosa Andr.is an endemic shrub flower in China with 2n=10.This study used 228 cultivars from four populations,i.e.,Jiangnan,Japan,Northwest,and Zhongyuan,as materials to explore the genetic diversity levels among different populations of tree peony varieties.The results showed that 34 bands were amplified using five pairs of cp SSR primers,with an average of 6.8 bands per primer pair.The average number of different alleles(N_(a)),effective alleles(N_(e)),Shannon's information index(I),diversity(H),and polymorphic information content(PIC)were 3.600,2.053,0.708,0.433,and 0.388,respectively.The PIC value was between 0.250 and 0.500,indicating a moderate level of polymorphism for the five cp SSR primer pairs.The genetic diversity levels of peony cultivars varied among different populations,with the Northwest population showing relatively lower levels(I=0.590,H=0.289,and PIC=0.263).A total of 52 haplotypes were identified in the four examined populations,and the number of haplotypes per population ranged from 11 to 22.Forty-four private haplotypes were detected across populations,and the Northwest population exhibiting the highest count of private haplotypes with 17.The mean number of effective number of haplotypes(N_(eh)),haplotypic richness(R_(h)),and diversity(H)were 8.351,6.824,and 0.893,respectively.Analysis of molecular variance indicated that genetic variation within tree peony germplasm was greater than that between germplasm resources,and the main variation was found within individuals of peony germplasm.Cluster analysis,principal coordinate analysis,and genetic structure analysis classified tree peonies from different origins into two groups,indicating a certain degree of genetic differentiation among these four tree peony cultivation groups.This study provides a theoretical basis for the exploration,utilization,and conservation of peony germplasm resources,as well as for research on the breeding of excellent varieties.展开更多
文摘随着高比例新能源的接入,互联电力系统不同控制区间的电源结构差异日益增大,有些控制区新能源装机增加、常规机组减少导致调频需求增加但控制能力下降。传统联络线功率频率偏差控制(tie-line power and frequency bias control,TBC)模式下的控制性能评价标准(control performance standard,CPS)标准,通过频率偏差系数来确定各控制区的考核阈值,却未考虑各控制区客观电源结构的影响,在高比例新能源电力系统中的不适应性日益凸显。首先分析了现有CPS标准的前提条件与内涵,揭示了CPS标准在高比例新能源电力系统中的不适应性,进而提出了控制区固有区域控制偏差(area control area,ACE)标准差的概念,利用固有ACE标准差确定考核阈值,提出了CPS标准的改进方法,并与原有CPS标准进行了对比。最后通过算例分析,验证了所提出改进标准比原有CPS标准更加公平合理。
文摘合作问题解决(Collaborative Problem Solving,CPS)理论强调以学生为主体,引导学生通过合作协商的方式分析问题、解决问题。简要阐述了CPS理论的内涵,分析了CPS理论在小学数学教学中的应用价值,指出了基于CPS理论的小学数学教学基本流程,提出了CPS理论在小学数学教学中的应用建议,旨在提升学生的合作能力与问题解决能力,并为广大的小学数学教育工作者开展教学提供参考。
文摘在全球化与信息爆炸背景下,复杂问题解决(Complex Problem Solving, CPS)作为衡量个体应对动态、不确定及非透明情境能力的核心构念,已成为教育心理学领域高阶认知研究的焦点。本文系统梳理了CPS从“问题空间搜索”到“双重空间理论”的理论演进,阐明了其知识获取与知识应用的双阶段认知加工特征。文章重点评述了计算机模拟微世界、形式化框架及多重复杂系统(MCS)等测评范式的更迭,并从个体差异、系统特质及发展心理学视角剖析了CPS的影响机制。尽管CPS在实证评估与干预实践中展现出显著的应用前景与生态效度,但仍面临心理测量学标准化不足、纵向追踪研究匮乏以及理论与实践转化断裂等挑战。未来研究应致力于优化测评工具的测量等价性,深化影响机制的路径分析,并强化跨学科视域下的教育干预实证研究。
基金supported by Innovation Scientists and Technicians Troop Construction Projects of Henan Province(Grant No.212101510003)the Central Plains Scholar Workstation Project(Grant No.224400510002)+1 种基金the Youth Science Foundation of Henan Province(Grant No.202300410136)the Experimental Development Foundation of Henan University of Science and Technology(Grant No.SY2324004)。
文摘Paeonia suffruticosa Andr.is an endemic shrub flower in China with 2n=10.This study used 228 cultivars from four populations,i.e.,Jiangnan,Japan,Northwest,and Zhongyuan,as materials to explore the genetic diversity levels among different populations of tree peony varieties.The results showed that 34 bands were amplified using five pairs of cp SSR primers,with an average of 6.8 bands per primer pair.The average number of different alleles(N_(a)),effective alleles(N_(e)),Shannon's information index(I),diversity(H),and polymorphic information content(PIC)were 3.600,2.053,0.708,0.433,and 0.388,respectively.The PIC value was between 0.250 and 0.500,indicating a moderate level of polymorphism for the five cp SSR primer pairs.The genetic diversity levels of peony cultivars varied among different populations,with the Northwest population showing relatively lower levels(I=0.590,H=0.289,and PIC=0.263).A total of 52 haplotypes were identified in the four examined populations,and the number of haplotypes per population ranged from 11 to 22.Forty-four private haplotypes were detected across populations,and the Northwest population exhibiting the highest count of private haplotypes with 17.The mean number of effective number of haplotypes(N_(eh)),haplotypic richness(R_(h)),and diversity(H)were 8.351,6.824,and 0.893,respectively.Analysis of molecular variance indicated that genetic variation within tree peony germplasm was greater than that between germplasm resources,and the main variation was found within individuals of peony germplasm.Cluster analysis,principal coordinate analysis,and genetic structure analysis classified tree peonies from different origins into two groups,indicating a certain degree of genetic differentiation among these four tree peony cultivation groups.This study provides a theoretical basis for the exploration,utilization,and conservation of peony germplasm resources,as well as for research on the breeding of excellent varieties.
