资源环境约束下中国TFP增长的空间差异和影响因素

运用DDF模型和ML生产率指数,对中国分省资源环境约束下的区域全要素生产率进行测算,采用Theil指数测算资源环境约束下中国全要素生产率增长的地区差异并按照多种空间尺度进行区域分解;构建空间面板数据模型,采用广义空间面板自回归最小二乘法对资源环境约束下全要素生产率增长的影响因素进行实证研究。研究结果表明,在2010年之前,资源环境约束下中国全要素生产率增长的空间差异总体上呈下降态势,地区内而非地区间差距是造成总体空间差异的主要来源。空间计量模型回归估计结果表明,资源环境约束下全要素生产率增长存在显著的正向空间溢出效应,经济发展水平、贸易开放和科技创新水平对资源环境约束下全要素生产率增长存在显著的促进作用,产业结构、能源结构和要素禀赋结构等结构因素对全要素生产率增长存在显著的负向影响,外商直接投资和环境规制水平对全要素生产率增长的影响在统计上并不显著。     

“形趋势结构”的组织结构和语义特点

本文研究“形趋结构”的语法特点。通过对“形趋结构”的组织结构及语义特征的剖析 ,认为汉语不同性质单位的整合可导致兼容的互补结构 ,并构建互补而非匀质的语义系统     

素质方向性与艺术影响力的关系研究

素质是人类在自然界求生存和谋发展的必备能力。每种素质都有不同的方向性。素质可归结为三种类型，即向上不变性素质、向下不变性素质和上下可变性素质。先天遗传因素和后天环境影响都可以不同程度地改变人的素质，其中艺术作为后天环境影响力最大。艺术可将自然界和人类社会中丑的事物转化为美，产生一种向上的力量，这种力量会极大地提升人的素质水平。从脑科学角度讲，艺术可以改变人的素质方向也是有其科学依据的。     

Some linear model techniques for analyzing small-circle spherical data

The author investigates least squares as a method for fitting small-circle models to a sample of unit vectors in R³. He highlights a local linear model underlying the estimation of the parameters of a circle. This model is used to construct an estimation algorithm and regression-type inference procedures for the parameters of a circle. It makes it possible to compare the fit of a small circle with that of a spherical ellipse. The limitations of the least-squares approach are emphasized: when the errors are bounded away from 0, the least-squares estimators are not consistent as the sample size goes to infinity. Two examples, concerned with the migration of elephant seals and with the classification of geological folds, are analyzed using the linear model techniques proposed in this work.     

On learning strategies for evolutionary Monte Carlo

The real-parameter evolutionary Monte Carlo algorithm (EMC) has been proposed as an effective tool both for sampling from high-dimensional distributions and for stochastic optimization (Liang and Wong, 2001). EMC uses a temperature ladder similar to that in parallel tempering (PT; Geyer, 1991). In contrast with PT, EMC allows for crossover moves between parallel and tempered MCMC chains. In the context of EMC, we introduce four new moves, which enhance its efficiency as measured by the effective sample size. Secondly, we introduce a practical strategy for determining the temperature range and placing the temperatures in the ladder used in EMC and PT. Lastly, we prove the validity of the conditional sampling step of the snooker algorithm, a crossover move in EMC, which extends a result of Roberts and Gilks (1994).     

方位结构中参照的表现形式

方位结构包括“名词性成分十方位成分”和“方位成分十名词性成分”两种类型。由名词性成分充当的参照可以出现在结构的前端,也可以出现在后端。在前一种结构类型中,参照由线性结构成分直接表现出来,都属于外参照；在后一种结构类型中,一部分参照属于外参照,另一部分参照则没有用线性结构成分直接表现出来而需要根据知识背景推知,属于内参照。     

声频定向扬声器DSB算法的谐波失真

依据一种新型扬声器——声频定向扬声器的基本工作原理,从理论上给出了DSB算法中调制系数对输出信号谐波失真影响的详细推导过程;并指出调制系数越小,失真度越小,但带来的负面效应是小的调制系数将使输出的信号功率相应变小。在此基础上,指出DSB算法本身存在一个12dB/倍频程的频率响应倾斜,在设计声频定向扬声器时必须采用算法预处理或换能器频响设计的方法对其进行补偿,以获得较好的声音保真效果。     

Optimal designs for minimising covariances among parameter estimators in a linear model

We construct approximate optimal designs for minimising absolute covariances between least‐squares estimators of the parameters (or linear functions of the parameters) of a linear model, thereby rendering relevant parameter estimators approximately uncorrelated with each other. In particular, we consider first the case of the covariance between two linear combinations. We also consider the case of two such covariances. For this we first set up a compound optimisation problem which we transform to one of maximising two functions of the design weights simultaneously. The approaches are formulated for a general regression model and are explored through some examples including one practical problem arising in chemistry.     

区域体育定向发展对高校体育课程建设的影响

我国是一个多民族国家,经济发展水平不均衡,各民族之间的文化、城乡之间的观念不同,导致各地区间的体育发展水平各异,高校体育教学理念、体育师资建设、体育课程建设等方面都存在明显的差异.本文通过对区域体育的定向发展与高校体育课程建设的关系的研究,指出高校体育课程建设应随着区域体育的发展而不断进步,高校体育应加强区域之间、高校之间的联动,丰富体育课程建设内容,培养更多更好的人才.