科技成果转化的一般过程及影响因素

本文叙述了科技成果转化的一般过程，归纳了四种转化模式，同时讨论了影响科技成果转化的因素和原因．     

基于成果转化贡献的科研团队成员收益分配研究

促进科技成果转化是我国深化科技体制改革的重要内容,是科技成果转化为现实生产力的关键环节,是实施创新驱动发展战略的根本要求。科研团队成员作为企业科技创新活动的主体,让其参与成果转化收益的分配,有利于调动其科技创新与成果转化的积极性。本文通过理论分析,采用主成分分析法和关键绩效指标法,研究科研团队成员在成果转化阶段的贡献的关键指标、权重及量表,构建收益分配模型。研究结论为完善科技成果转化各利益相关者的激励机制提供了理论依据。     

主成分分析法在非寿险保险公司偿付能力影响因素中的应用

本文运用主成分分析法对非寿险保险公司偿付能力诸多影响因素进行分析,简化成几个综合的成分,所得结果为保险监管部门和保险公司制定切实有效的管理策略,提供有价值的参考。     

企业经济效益的主成分分析

经济效益是经济工作的中心，提高经济效益是企业经营管理的基本要求。本运用主成分分析法，把评价企业经济效益的多指标转化为少数几个综合指标，抓住复杂经济问题的主要矛盾，为经营、投资提供有价值的参考，为宏观调控和企业的科学管理提供了简明、规范的评价方法。     

国有企业科研团队的股权分配研究

科研团队是国有企业产品创新和技术创新的主体,对掌握核心技术的科研团队实施股权激励成为企业增强其创新活力的有效手段。通过分析国有企业对科研团队股权激励政策及实践现状,在国有企业科研团队已拥有科技成果但尚未产生经济效益的情况下,以科技成果贡献为导向,采用主成分分析法和权值因子法等设计国有企业科研团队的科技成果贡献考核指标、权重及量表,确定科研团队在企业中可获得的股权分配比例。研究结论为国有企业科研团队实施股权激励提供了理论依据。     

市场经济条件下科技成果转化的机制与对策

本文探讨了市场经济条件下科技成果转化的机制，并进一步提出了相应的对策。     

逐步回归在全员效率分析中的应用

本文根据矩阵和逐步回归分析的基本原理，利用电子计算机对影响原煤全员效率的诸多因素进行多元分析．通过数据处理，找出了影响全员效率的主要因素，为预测原煤全员效率提供了数量化依据．     

官、产、学、研相结合的技术开发体系及运作机制探讨

产、学、研合作是一种加快科技成果向现实生产力转化，促进科技与经济密切结合的有效途径。在我国目前逐步确立的社会主义市场经济体制下，政府的行为及其配套政策对产、学、研合作起着至关重要的作用。因此研究和探讨符合我国实际情况的官、产、学、研相结合的技术开发体系与运作机制是极为现实的问题。本文的研究与探讨旨在能为解决和改善这一问题提供一些参考。     

安全生产下政府、煤矿企业、员工的决策行为演化研究

安全生产对于煤矿企业至关重要,本研究将政府、煤矿企业和员工纳入演化博弈模型中,探究三方主体间决策的博弈关系和演化路径。研究表明:政府、煤矿企业和员工的决策向理想状态的演化过程受到诸多因素的影响,不同因素取值范围对三方主体向理想状态收敛速度产生差异化影响;当满足一定条件时,三方主体的决策行为能够演化为理想状态,政府有效监管能够促进企业由惩罚型向激励型模式转化,激励型模式能够有效激发员工安全主动行为。以期为政府制定安全监管决策、企业转化安全生产管理模式、员工激发安全主动行为提供有益的建议。     

基于AHP-Entropy方法的科技成果转化绩效评价

科技成果的转化绩效优劣需要从多个层次、多个视角进行考核,本文从转化成果的经济效益、社会效益、环境效益和扩散效应等四个方面对科技成果转化绩效进行评价,评价体系的建立力求突出指标的精炼性和数据的可获性,借助AHP-Entropy方法并结合调查数据开展实证分析,阐述了评价方法的操作步骤且验证了评价体系的科学性和实践可行性。     

Density results for subspace multiwindow Gabor systems in the rational case

Let S be a periodic set in R and L2(S) be a subspace of L2 (R). This paper investigates the density problem for multiwindow Gabor systems in L2(S) for the case that the product of time-frequency shift parameters is a rational number. We derive the density conditions for a multiwindow Gabor system to be complete (a frame) in L2(S). Under such conditions, we construct a multiwindow tight Gabor frame for L2(S) with window functions being characteristic functions. We also provide a characterization of a multiwindow Gabor frame to be a Riesz basis for L2(S), and obtain the density condition for a multiwindow Gabor Riesz basis for L2(S).     

Multiround Unconditionally Secure Authentication

Authentication codes are used to protect communication against a malicious adversary. In this paper we investigate unconditionally secure multiround authentication schemes. In a multiround scheme a message is authenticated by passing back and forth several codewords between the sender and receiver. We define a multiround authentication model and show how to calculate the probability of a successful attack for this model. We prove the security for a 3-round scheme and give a construction for the 3-round scheme based on Reed-Solomom codes. This construction has a very small key size for even extremely large messages. Furthermore, a secure scheme for an arbitrary number of rounds is given. We give a new upper bound for the keys size of an n-round scheme.     

A Simple Method for Computing the Observed Information Matrix When Using the EM Algorithm with Categorical Data

Abstract

A simple matrix formula is given for the observed information matrix when the EM algorithm is applied to categorical data with missing values. The formula requires only the design matrices, a matrix linking the complete and incomplete data, and a few simple derivatives. It can be easily programmed using a computer language with operators for matrix multiplication, element-by-element multiplication and division, matrix concatenation, and creation of diagonal and block diagonal arrays. The formula is applicable whenever the incomplete data can be expressed as a linear function of the complete data, such as when the observed counts represent the sum of latent classes, a supplemental margin, or the number censored. In addition, the formula applies to a wide variety of models for categorical data, including those with linear, logistic, and log-linear components. Examples include a linear model for genetics, a log-linear model for two variables and nonignorable nonresponse, the product of a log-linear model for two variables and a logit model for nonignorable nonresponse, a latent class model for the results of two diagnostic tests, and a product of linear models under double sampling.     

Determinants of matrices over semirings

In this paper, the concept of determinants for the matrices over a commutative semiring is introduced, and a development of determinantal identities is presented. This includes a generalization of the Laplace and Binet–Cauchy Theorems, as well as on adjoint matrices. Also, the determinants and the adjoint matrices over a commutative difference-ordered semiring are discussed and some inequalities for the determinants and for the adjoint matrices are obtained. The main results in this paper generalize the corresponding results for matrices over commutative rings, for fuzzy matrices, for lattice matrices and for incline matrices.     

A PTAS for the disk cover problem of geometric objects

We present PTASs for the disk cover problem: given geometric objects and a finite set of disk centers, minimize the total cost for covering those objects with disks under a polynomial cost function on the disks’ radii. We describe the first FPTAS for covering a line segment when the disk centers form a discrete set, and a PTAS for when a set of geometric objects, described by polynomial algebraic inequalities, must be covered. The latter result holds for any dimension.     

A new hybrid method for solving a generalized equilibrium problem, solving a variational inequality problem and obtaining common fixed points in Banach spaces, with applications

The purpose of this paper is to prove by using a new hybrid method a strong convergence theorem for finding a common element of the set of solutions for a generalized equilibrium problem, the set of solutions for a variational inequality problem and the set of common fixed points for a pair of relatively nonexpansive mappings in a Banach space. As applications, we utilize our results to obtain some new results for finding a solution of an equilibrium problem, a fixed point problem and a common zero-point problem for maximal monotone mappings in Banach spaces.     

Duality theorem for a generalized Fermat-Weber problem

The classical Fermat-Weber problem is to minimize the sum of the distances from a point in a plane tok given points in the plane. This problem was generalized by Witzgall ton-dimensional space and to allow for a general norm, not necessarily symmetric; he found a dual for this problem. The authors generalize this result further by proving a duality theorem which includes as special cases a great variety of choices of norms in the terms of the Fermat-Weber sum. The theorem is proved by applying a general duality theorem of Rockafellar. As applications, a dual is found for the multi-facility location problem and a nonlinear dual is obtained for a linear programming problem with a priori bounds for the variables. When the norms concerned are continuously differentiable, formulas are obtained for retrieving the solution for each primal problem from the solution of its dual.     

The shape of the hazard function for cancer incidence

A population-based cohort consisting of 126,141 men and 122,208 women born between 1874 and 1931 and at risk for breast or colorectal cancer after 1965 was identified by linking the Utah Population Data Base and the Utah Cancer Registry. The hazard function for cancer incidence is estimated from left truncated and right censored data based on the conditional likelihood. Four estimation procedures based on the conditional likelihood are used to estimate the age-specific hazard function from the data; these were the life-table method, a kernel method based on the Nelson Aalen estimator, a spline estimate, and a proportional hazards estimate based on splines with birth year as sole covariate.The results are consistent with an increasing hazard for both breast and colorectal cancer through age 85 or 90. After age 85 or 90, the hazard function for female breast and colorectal cancer may reach a plateua or decrease, although the hazard function for male colorectal cancer appears to continue to rise through age 105. The hazard function for both breast and colorectal cancer appears to be higher for more recent birth cohorts, with a more pronounced birth-cohort effect for breast cancer than for colorectal cancer. The age specific for colorectal cancer appears to be higher for men than for women. The shape of the hazard function for both breast and colorectal cancer appear to be consistent with a two-stage model for spontaneous carcinogenesis in which the initiation rate is constant or increasing. Inheritance of initiated cells appears to play a minor role.     

Carleman estimate for a strongly damped wave equation and applications to an inverse problem

In this paper, we establish a Carleman estimate for a strongly damped wave equation in order to solve a coefficient inverse problems of retrieving a stationary potential from a single time‐dependent Neumann boundary measurement on a suitable part of the boundary. This coefficient inverse problem is for a strongly damped wave equation. We prove the uniqueness and the local stability results for this inverse problem. The proof of the results relies on Carleman estimate and a certain energy estimates for hyperbolic equation with strongly damped term. Moreover, this method could be used for a similar inverse problem for an integro‐differential equation with hyperbolic memory kernel. Copyright © 2012 John Wiley & Sons, Ltd.     

Implicit construction of multiple eigenvalues for trees

We are generally concerned with the possible lists of multiplicities for the eigenvalues of a real symmetric matrix with a given graph. Many restrictions are known, but it is often problematic to construct a matrix with desired multiplicities, even if a matrix with such multiplicities exists. Here, we develop a technique for construction using the implicit function theorem in a certain way. We show that the technique works for a large variety of trees, give examples and determine all possible multiplicities for a large class of trees for which this was not previously known.