两岸高科技产业的发展与合作

知识经济时代,各国和地区都把发展高科技作为提高竞争力的主要手段,纷纷制定相应的战略措施加速高科技产业的发展。两岸自20世纪80年代以来,确立了各自高科技产业的分类标准,制定和实施了一系列高科技产业政策。经过十多年发展,两岸高科技产业已经各具规模和特色,在此进程中两岸在高科技产业上的合作也日益加深。     

军事物流仿真模型技术研究

为了更好地进行物流体系规划和方案评估。文章提出了军事物流仿真问题。描述了国内外军事物流仿真进展情况及主要问题。提出了从实体建模、业务建模、行动建模的仿真思路和技术框架模型。     

THE IMPACT OF ACADEMIC PATENTING ON THE RATE,QUALITY AND DIRECTION OF (PUBLIC) RESEARCH OUTPUT*

We examine the influence of faculty patenting on the rate, quality, and content of public research outputs in a panel dataset of 3,862 academic life scientists. Using inverse probability of treatment weights (IPTW) to account for self‐selection into patenting, we find that patenting has a positive effect on the rate of publications and a weak positive effect on the quality of these publications. We also find that patenters may be shifting their research focus to questions of commercial interest. We conclude that the often voiced concern that patenting in academe has a nefarious effect on public research output is misplaced.     

SBS防水卷材屋面工程施工的质量控制

文章介绍屋面防水施工选用的SBS防水卷材的性能，屋面坡度设计，砂浆找平层的处理，铺贴方法及各道工序的质量控制要求。     

一种基于帧结构的MIMO-OPDA盲均衡改进算法

提出了一种新的改进外积分解法(OPDA),克服了单输入多输出(SIMO)系统中的OPDA盲均衡算法扩展到多输入多输出(MIMO)系统中计算复杂度增加的缺点。在MATALB中构建了基于帧结构的MIMO-OPDA盲均衡算法模型,并将改进算法和原算法进行了仿真比较.仿真表明系统运算速度提高了,而且随着接收信息的累积,改进的OPDA和原OPDA算法性能相当,证明算法改进十分有效。     

Ratio Analysis Using Rank Transformation

This paper presents an alternate method for transforming financial ratios. Ratios are ranked and scaled into a uniform distribution with boundaries between 0 and 1. Conceptually, we suggest that this method solves a number of methodological problems associated with ratios, including constrained choice of regression models, ratio outliers, negative ratios, and non-normal distributions. Scaled ranks of financial ratios are also conceptually appealing because they appear to capture comparative ordinal data about cross-sectional relationships between firms.The study empirically tests scaled rank transformations by examining the association of the transformations with stock returns. Results show that models using relative ranked accounting ratios have more explanatory and predictive power than untransformed, log-transformed and square-root transformed ratios.     

粤港澳大湾区城市建设用地和经济规模增长格局演变及协同关系

文章研究了1990—2017年期间粤港澳大湾区各城市建设用地增长情况及经济规模变化情况,并对二者之间的协同关系进行了分析。主要结论如下:1990—2017年,粤港澳大湾区各城市建设用地增长速度总体呈加快态势,各城市在不同时期建设用地增长速度的变化与城市所处发展阶段的变化密切相关。大湾区内城市经济规模多数在广东—港澳范围内排行前列,且位序逐渐攀升,仅有肇庆和澳门在1990—2017年经济规模在广东—港澳范围内排序明显下降。以1990年为基期,至2017年,大湾区整体建设用地与经济规模增长的协同度一直处于上升的态势,有序性不断增强,上升速度2010—2017年期间与之前相比有明显的下降,体现出近年来随着城市化进程的不断推进,建设用地增长和经济规模增长二者之间的相互依赖程度有所下降。各城市间建设用地与经济规模增长的协同度演变差异性十分明显。深圳、珠海、中山三个城市建设用地增长对经济规模增长的作用效率在研究期间不断上升,其他多数城市研究期间该效率在2000—2010年期间达到最高,2010—2017年期间均出现明显下降。各城市间产业的发展阶段以及目标定位的不同造成了建设用地和经济规模增长协同性的差异。     

大型储存设施——圆顶保温仓库

圆顶保温仓库，具有结构简单、高强度、无梁、无柱、密封、保温、通风性能良好等特点。它是储存粮食、蔬菜、瓜果、肉类的理想设备     

Spatial Economic Analysis in Data‐Rich Environments

Controlling for spatial effects in micro‐level studies of consumer and producer behaviour necessitates a range of analytical modifications. These range from modest changes in data collection and the definition of variables to dramatic changes in the modelling of consumer and producer decision‐making. This paper discusses conceptual, empirical and data issues involved in modelling the spatial aspects of economic behaviour in data‐rich environments. Attention is given to established and emerging agricultural economic applications of spatial data and spatial econometric methods at the micro‐scale. Recent applications of individual and household data are featured, including models of land‐use change at the urban–rural interface, agricultural land values, and technological change and technology adoption.     

Responding to Digital Transformation by External Corporate Venturing: An Enterprising Family Identity and Communication Patterns Perspective

Digital transformation increasingly requires activities located outside firm boundaries, for example via alliances with start‐up companies. Despite this, German Mittelstand firms, primarily owned and managed by enterprising families and seen as role models of innovation, appear reluctant to place strategic emphasis on venturing outside the firm’s boundaries when it comes to digital transformation. Drawing on the concepts of identity and communication patterns, we theorize on the mechanisms behind this behaviour. Applying structural equation modelling to a sample of 254 members of the next generation in enterprising families from Germany, we find that family communication patterns impact the strategic priority for or against external corporate venturing via identity‐related considerations.