H.26 L帧内预测编码的研究与实现

介绍H.26L压缩编码标准和基于4×4子块的TML-9预测编码测试模型，写出实现算法，并用Visual C＋＋编程实现。     

5-对硝基苯基偶氮基-25,26,27-三甲氧基-28-羟基杯[4]芳烃的合成

以杯[4]芳烃三甲醚和对硝基苯胺为原料,经重氮化-偶合反应合成了5-对硝基苯基偶氮基-25,26,27-三甲氧基-28-羟基杯[4]芳烃,通过IR,1H NMR对其结构进行了表征.     

基于RD域分块的改进距离徙动成像算法

研究了二维频域成像算法,提出一种基于RD域分块的改进距离徙动成像算法,并将该算法与近似算法和一般逆变标算法进行了点阵目标仿真和运算效率比较.当测绘带较宽且距离徙动较大时,该算法聚焦性能优于近似算法和一般逆变标算法.通过比较还可看出该算法运算效率高于逆变标算法.最后用实测数据仿真验证了该算法是可行的.     

基于MPLS的VPN技术分析及应用

介绍了MPLS工作原理,从MPLS VPN的网络结构、体系架构来分析MPLS VPN的工作原理.通过MPLS VPN的基本配置实例来说明如何应用它,从而实现MPLS VPN的强大功能.     

Dynamics of R&D networked relationships and mergers and acquisitions in the smart card field

This paper analyzes how the structure and the evolution of inter-firm agreements have shaped the development of the smart card industry. The aim is to establish a closer connection between the evolution of inter-firm agreements in the smart card industry and the patterns of change of technology and demand in this new high-tech industry. Based on a proprietary database covering both collaborative agreements and mergers and acquisitions (M&As) occurring in this industry over the period 1992–2006, we find that the evolution of technology and market demand shapes the dynamics of R&D networks and M&As are likely to change the industry structure. We also find that a small group of producers – first-movers – still control the industry and technological trajectories. Their position arises not for oligopolistic reasons of market structure, but for technological and organizational reasons.     

海外高科技人才回流对中国区域经济发展的影响机制研究——基于门槛效应的实证分析

本文利用中国2002-2016年省际面板数据,以国际人才迁移和中国海归回流为研究背景,以R D投入强度作为人力资源对中国区域经济增长的门槛变量,构建了门限回归模型,实证研究海外高科技人才回流对中国区域经济增长的影响。研究结果表明：R D投入的双重门限效应显著作用于海外高科技人才对区域经济发展的贡献,随着R D投入强度的不同,海外高科技人才回流对区域经济增长的影响存在U型关系,具体而言,当R D投入强度小于0.010或大于0.058时,其正向影响最为显著,介于该值之间,海外高科技人才对区域经济增长的影响效应有所减弱。该研究可以为各地区海归回流与人才引进政策的制定与完善提供科学依据和参考,进而更好地服务于我国区域经济发展,使其以稳健的发展步伐前进。     

New firm formation and regional knowledge production modes: Italian evidence

According to the knowledge-spillovers theory of entrepreneurship (KSTE), local knowledge spillovers affect entrepreneurial dynamics, because of knowledge asymmetries and uncertainty. Most of the empirical literature has tested this hypothesis using a measure of local knowledge stock. This paper is aimed at extending the framework by showing that the domains over which local knowledge spans are also important. The paper investigates the impact of the configuration of local knowledge bases on new firm formation dynamics by combining the KSTE framework with the recombinant knowledge approach. Local knowledge bases emerge from the combination of different knowledge inputs. These inputs may be closely or loosely related to one another. Technological differentiation and the relatedness degree of local competences can be interpreted as characteristics of the local knowledge base interacting with the knowledge filter and the entrepreneurial absorptive capacity. The paper proposes a taxonomy of regional modes of knowledge production and investigates new firm formation in 92 Italian NUTS 3 regions observed over the 1995–2009 time span. The results confirm that the availability of local knowledge pools is important, and show that the ‘rich integration’ mode is the configuration that favours the entrepreneurial process. Finally, the policy implications and avenues for further research are presented and discussed.     

对中国女篮参加第26届奥运会比赛进攻速度与成功率关系的研究

运用文献、录象、统计、对比等研究方法,得出中国女篮参加第26届奥运会比赛进攻速度与成功率的关系是：随着进攻速度的由快到慢,进攻成功率呈逐渐下降的趋势,但在阵地进攻阶段成功率有波动性。     

Cognitive profiling in Chinese developmental dyslexia with attention-deficit/hyperactivity disorders

The cognitive profiles of children with Developmental Reading Disorder (RD) and Attention-Deficit/Hyperactivity Disorders (ADHD) have been extensively studied in alphabetic language communities. Deficits in phonological processing and rapid naming have been implicated as core features of RD although whether the latter is a deficit specific to RD remains controversial. Similar research aiming to explore the cognitive profiles of children with both RD and ADHD in non-alphabetic language communities is limited. The specificity of rapid naming deficit to RD among Chinese has yet to be studied. In the first study, 43 Chinese children with confirmed diagnoses of RD + ADHD were assessed on their cognitive abilities in relating to reading. In the second study, the specificity deficit hypothesis of rapid naming to RD but not ADHD was examined. A digit naming test was administered to the RD + ADHD group (43 subjects) and an ADHD only group (49 subjects). In regard to cognitive profiling, rapid naming and orthographic knowledge were found to be the most common deficits among the Chinese RD + ADHD group. This co-morbid group was also found to have a significant deficit performance on the rapid naming task than the ADHD only group. The present findings support the double dissociation hypothesis in cognitive deficit between RD and ADHD. The results of both studies are discussed with reference to the findings of the Western counterparts.     

H.26L中对 H.263建议的主要算法改进及其分析

继制定了 H.261、 H.263、 H.263+ 等视频压缩标准后 , ITU-T正在制定新的视频压缩标准 H.26L, 目的是为了取得更好的图像压缩效果和更多的实用功能 . 本文对 H.26L的关键模块及主要原理进行分析 , 并将其与 H.263、 H.263+ 进行比较 , 归纳出 H.26L的主要特点和优点 , 证实其能达到更高效的压缩能力 .