实现众创空间创新功能的机制设计

关于众创空间的现有研究大多关注内在主体(创客)或外部因素(诸政策支持、生态环境等),而对于众创空间本身的机制设计讨论却十分匮乏。基于创新生态系统治理视角,采用QCA与NCA混合方法,对浙江省63家众创空间的数据进行分析,探索众创空间的合理机制设计方案。结果表明：众创空间创新功能的发挥是多种运行机制协同作用的结果,其中平台服务功能、资源汇集通道、正式联结关系、成果共享文化是众创空间不可或缺的机制支撑,配合屏蔽外部资源提供者干预行为或构建包容试错的文化氛围,可以形成两条促进众创空间创新功能发挥的有效路径。     

Fuzzy值向量函数的极限

本文以三参数型Fuzzy数为基础,建立了Fuzzy值向量函数的概念,从而把Fuzzy值向量函数与实函数联系起来,讨论了Fuzzy值向量函数的极限的性质。     

益母草的染色体数目

Leonurus japonicus Houtt. [L. heterophyllus Sweet, L. artemisia  (Lour.) S.  Y. Hu]  is one of the most important traditional Chinese medicines used as a remedy for gynaeco- logical disease since ancient times.  A cytological investigation on the species was carried out and the materials for chromosomal examination were collected from 26 localities in 20 provi- noes and autonomous regions of this country.  The number of chromosomes in root tip cell of the species was found to be 20 on the whole (Tab. 1:1), agreeing with those reported by Ma and al.[2] and probably by Chuang and al.[3] as well.      The genus Leonurus L. is variable in its  chromosomes with an aneuploidy of x=9, 10 and 12.  The present authors would propose that the primitive basic number of chromosome in the genus is 9, and thus both 10 and 12 are derived, for: (1) among the 9 species (including 1 sub- species) heretofore cytologically examined, x=9 occurring in 66.7%, x=10 occurring in 22.2%, while x=12 occurring only in 11.1%; (2) in generaclosely related to the genus under considera- tion, such as Panzeria, Galeobdolon and Lamium x=9 being the sole basic number.      But L. japonicus exhibits a mixoploidy of 2n=20 (occurring at the rate of 53.30% of the total amount of cells examined), 2n=18 (30.70%), and 2n=16 (15.99%) in our work. (Table 1).  Since the original basic number of  chromosome of the genus is 9 as proposed above, 2n= 20 would be considered as a derived one and the occurrence of 2n=18 probably suggests an early evolutionary trend of 2n=18→20 of the pecies in question.     

一个涉及三个三角形的三元二次型不等式

应用文献[1]的一个推论,建立了一个新的涉及三个三角形的三元二次型三角不等式,讨论了这一不等式的应用,解决了文献[1]中提出的一个猜想,提出了两个尚待解决的猜想。     

黄河置换水量的水权分配方法探讨

为了促进西部开发，在南水北调东线和中线工程开始发挥效益和西线工程尚未建成之前，可在东线和中线的受水区范围内置换出一部分引黄水量，重新分配给黄河上中游使用。黄河置换水量的分配是一个特殊的水的使用权的分配问题，也是一个多地区、多目标的决策问题。该文首先探讨了水权的基本理论和使用权的分配原则，即有效性、公平性、可持续性的原则，并依据这些原则，构建了水量分配的一整套指标体系。为解决这一多地区目标的决策问题，研究提出了根据这些原则，构建了水量分配的一整套指标体系。为解决这一多地区多目标的决策问题，研究提出了根据水权分配指标体系，应用层次分析和模糊决策理论相结合的模式进行了水权分配的方法。采用该方法对黄河置换水量进行了分配决策，获得了较为合理和满意的结果。     

QR分解和Cholesky分解的Rice条件数

条件数是在计算过程中由于误差引起的放大系数, 所以条件数理论在误差分析中占有非常重要的地位. 本文运用Rice关于条件数的一般理论, 采取一种统一的方式, 在单参数扰动的情况下, 定义了与正定对称矩阵的Cholesky 分解和一般矩阵的QR分解有关的一些矩阵因子的条件数. 利用解析展开和矩阵向量方程的方法, 求出了用Frobenius 范数所定义的Rice条件数的具体表达式. 所得结果与常小文的结果类似. 在Cholesky分解情况下, 与因子矩阵L 相对应的条件数 KL是 Stewart条件数K的一个下界.     

Nonsymbolic and symbolic magnitude comparison skills as longitudinal predictors of mathematical achievement

What developmental roles do nonsymbolic (e.g., dot arrays) and symbolic (i.e., Arabic numerals) magnitude comparison skills play in children's mathematics? We assessed a large sample in kindergarten, grade 1 and 2 on two well-known nonsymbolic and symbolic magnitude comparison measures. We also assessed children's initial IQ and developing Working Memory (WM) capacities. Results demonstrated that symbolic and nonsymbolic comparison had different developmental trajectories; the first underwent larger developmental improvements. Both skills were longitudinal predictors of children's future mathematical achievement above and beyond IQ and WM. Nonsymbolic comparison was moderately predictive only in kindergarten. Symbolic comparison, however, was a robust and consistent predictor of future mathematics across all three years. It was a stronger predictor compared to nonsymbolic, and its predictive power at the early stages was even comparable to that of IQ. Furthermore, the present results raise several methodological implications regarding the role of different types of magnitude comparison measures.     

杭子梢属10种植物的染色体数目

本文报道了杭子梢属Campylotropis Bunge国产10种1变种的染色体数目，其小孢子染色体数目为n=11，体细胞染色体数目为2n=22。 在光果小雀花C．polyantha var．leiocarpa中发现有少数个体为2n=23的非整倍体。     

实数域上亏损矩阵的广义特征矩阵

把复数域上的亏损矩阵的广义特征矩阵概念推广到实数域,发现它们也具有类似若当链的性质,可以简洁表示亏损矩阵的幂。     

数列加权平均值的极限及应用

给出了数列加权平均值的极限及其若干推论,最后研究了这些结果在证明及计算中的应用．