直接射频采样的L波段星载SAR数字接收机设计

设计了一种直接射频采样的L波段星载合成孔径雷达(SAR)数字接收机.适当选取射频采样频率,优化了数字正交解调结构.为减轻数据存储和传输的压力,实现了压缩比可变的分块自适应量化模块.直接射频采样简化了电路设计,提高了SAR系统的精确性和灵活性,仿真结果证明该设计技术可行、有效.     

The anatomy of a troll? Patent licensing business models in the light of patent reassignment data

We examine patent licensing business models of non-practicing entities that generate revenue by selling, licensing, or litigating patents. They may also pursue R&D activities, invent new technologies, or provide services to inventors or product companies. We describe their business models and patent market behavior and then compare their litigation strategies against product companies using a matched sample of highly comparable patents. The main differences among patent licensing firms stem from their technological capabilities, patent portfolio sizes, and external relationships. We find that licensing firms with technological capabilities often pursue litigation until decision and engage in forum shopping. In contrast, litigation incidence, parties involved, and outcomes are primarily determined by patent characteristics, not entity types. Licensing business models drive the acquisition of certain types of patents that influence the outcomes of the patent system. We argue that patent policy should strengthen mechanisms to discover invention quality rather than focus on the amount of litigation or types of entities.     

Electricity (de)regulation and innovation

In this paper we study the effect of deregulation on innovation in the electricity sector using a sample of 31 OECD countries. Exploiting sharp reductions in the level of product market regulation, explicitly linked to changes in the legal framework, we perform a difference-in-difference analysis by matching data retrieved from the OECD International Regulation, OECD Patent Grants, and UN World Development Indicators databases. Our main findings suggest that a decrease in regulation intensity, following a significant reform, has a negative impact on patents (granted by the European Patent Office). This impact appears to be mainly due to the degree of market contestability. Finally, we find evidence of an inverted U-shaped relationship between regulation and innovation. This may imply that the effect of deregulation on innovation depends on the strength of the deregulatory process.     

Do low-skilled workers gain from high-tech employment growth? High-technology multipliers,employment and wages in Britain

Do low-skilled workers benefit from the growth of high-technology industries in their local economy? Policymakers invest considerable resources in attracting and developing innovative, high-tech industries, but there is relatively little evidence on the distribution of the benefits. This paper investigates the labour market impact of high-tech growth on low and mid-skilled workers, using data on UK local labour markets from 2009–2015. It shows that high-tech industries – either STEM-intensive ‘high-tech’ or digital economy – have a positive jobs multiplier, with each 10 new high-tech jobs creating around 7 local non-tradeable service jobs, around 6 of which go to low-skilled workers. Employment rates for mid-skilled workers do not increase, but they benefit from higher wages. Yet while low-skilled workers gain from higher employment rates, the jobs are often poorly paid service work, so average wages fall, particularly when increased housing costs are considered.     

“In Praise of Wool”: The development of partition chromatography and its under-appreciated impact on molecular biology

The invention of partition chromatography by the biochemists Archer Martin and Richard Synge in 1941 offered crucial insights into the structure and function of DNA, insights at least as important as those from X-ray crystallography. Even so, the role that partition chromatography played in molecular biological studies is far less well known. Using new archival material, this article describes the origins of Martin and Synge’s work, arguing that their achievement was far more than a new technical innovation; it went on to have a profound impact on the development of molecular biology to an extent that scholars have insufficiently appreciated.     

庚子百年祭——记辽宁地区的义和团运动

:百年以前 ,在中国爆发的义和团反帝爱国斗争是中华民族空前危机的产物。辽宁地区是义和团在东北三省中最为活跃的地区。以沙俄为打击重点是辽宁地区义和团运动的重要特点     

家蚕作为生物反应器新用途的开发研究

针对当今人类神经的需求,蚕业的可持续发展,高新技术的突飞猛进,蚕业的教学与科研以家蚕的性状等情况,在分析了家蚕作为生物反应器新用途开发研究的必要性和可行性的基础上,全面论述了家蚕作为生物反应器在生产白僵蚕（蛹）、高价格物质、抗菌蛋白及珍贵药材等方面的开发研究概况,并对其发展前景作了展望,这对推动该领域的研究进程具有积极意义。