循环冗余编码算法及实现

差错控制编码理论是现代通信的一个重要理论范畴并在实际中有广泛的应用.较为详细分析了循环码编码、解码、检错及纠错原理、性能特点、应用领域等内容.最后给出微控制系统中常用的CRC算法实例以作参考.     

葡萄膜黑色素瘤中Rb和p16基因位点杂合性缺失和微卫星不稳定性的研究

目的检测葡萄膜黑色素瘤中Rb和p16基因位点的杂合性缺失（Loss of heterozygosity,LOH）和微卫星不稳定性（microsatellite instability,MSI）情况。方法采用PCR-SSLP-银染的方法,各选择Rb和p16位点三对多态性微卫星标记（人群中的杂合度在70%以上）,对15例葡萄膜黑色素瘤样本进行杂合性缺失和微卫星不稳定的研究。结果葡萄膜黑色素瘤Rb位点D13S153、D13S118、D13S119的LOH发生频率分别为53.3%、20%、26.7%,6个样本（40%）出现MSI现象;p16位点D9S171、D9S157、D9S942LOH的发生频率分别为6.7%、6.7%、20%,13.3%出现微卫星不稳定现象。结论Rb位点的LOH和MSI是葡萄膜黑色素瘤中常见的染色体改变,p16位点（LOH频率为26.7%）的基因变异需进一步研究证实。     

基于DSP和FPGA的通信控制系统的设计

通信控制系统是整机系统中必不可少的一部分,该系统的设计主要是以DSP和FPGA作为硬件资源,利用DSP的高速性实时的实现与上位机和各个分机之间的数据通信,利用FPGA的灵活性实现地址译码和信号幅度的计算,并且可以根据信号幅度控制信号的衰减,16c550芯片和HPI为该系统提供了外部通信接口。本系统在大多数整机系统中具有通用性。     

The impact of patent protection and financial development on industrial R&D

Stronger protection of patent rights is thought to spur innovation through securing returns to R&D investments. Those investments must be financed, however, suggesting that the responsiveness of R&D to patent reforms varies with financial development levels. We examine the joint impact of domestic and international financial-market development and patent protection on R&D intensities in 22 manufacturing industries in 20 OECD countries for the period 1990-2009. We show that stronger patent rights increase R&D intensities in patent-intensive industries, accounting for the need for external financing and the amount of tangible assets. The primary impact varies across types of financial development: patent protection raises R&D in high-patent industries where countries have more limited equity and credit markets. In contrast, in countries with more developed bond markets industry R&D is more sensitive to patent rights. Interestingly, patent rights in countries that are more exposed to foreign direct investment increase R&D intensities at all levels of financial development.     

TL16C554在多串口数据采集系统中的应用

TL16C554是TI公司专为多串口扩展设计生产的异步通信芯片,其内部由4个改进的TL16C550组成,在多串口通信系统中,通过异步通信芯片TL16C554来实现系统与多个外设进行高速可靠的串行通信,同时提高电路的可靠性与集成度。通过多串口数据采集系统的具体应用,给出PC/104通过TL16C554扩展多串口的硬件应用电路及TL16C554的初始化。     

Nonlinear capital market payoffs to science-led innovation

This study explores the extent to which cross-sectional differences in firms’ propensity to absorb and utilize scientific knowledge matter for their stock market and operating performance. Unlike previous empirical studies and given the coexistence of both benefits and potential costs to science-guided search, I conceptualize innovation as a recombinant search to hypothesize a non-monotonic relationship. Using patent data from the European Patent Office (EPO) relative to 3281 international firms over the 1999–2015 period, empirical tests yield evidence in support of the predictions. However, the effect varies with firm-level absorptive capacity, across industries and countries. As suggested by a limited attention model, I find a stronger payoff predictive power of science for firms with lower investor attention and higher valuation uncertainty. Besides, the association between science and future operating performance increases with time, indicating that firms’ scientific capabilities are a potent driver of long-term profitability. The conclusions are robust to controlling for the endogenous nature of firms’ use of scientific knowledge. By providing a useful basis upon which to judge the economic merit of firms’ innovation endeavors, this study contributes to reducing capital market imperfections that curtail access to external finance and ultimately spurring private-sector investment in R&D. It also provides evidence of diminishing marginal payoffs to science-led search. Finally, the evidence is likely to be relevant to policymakers, who might wish to influence the innovation ecosystem in a way to sustain long-term prosperity.     

新规则、新赛制对少儿乒乓球训练的逻辑学思考

乒乓球的直径由38mm扩大为40mm;原先每局21分的赛制大幅缩减为目前的每局只有11分,每方连续发2个球轮换的新赛制;实行“无遮挡”发球。以上三项新规则的实施,对现代乒乓球运动产生了巨大的影响。比赛节奏加快,对抗性增强,要增强运动员全台上手的积极性,丰富被动转换为主动的手段与能力,全面提升快凶型打法的均衡性,合理调整技术结构重心,重构强对抗性训练的新模式。从逻辑学的角度抓住乒乓球训练中几对突出的矛盾,对新时期少儿乒乓球训练进行反思,以使其更科学。     

青少年男篮运动员个性特征的研究

本文对江苏少体校甲组男篮运动员与普遍中学生的16PF均值进行对比检验,发现两者个性特征的诸因素存在差异,井通过江苏少体校运动员中主力队员与一般队员个性特征的差异,说明个性特征与运动能力的关系,为少体校运动员的选材及培养提供心理学依据。     

现代足球围抢战术的发展

对第16届世界杯足球赛围抢战术进行观察统计，并与14届观察结果进行对比分析，进一步了解围抢战术的基本特征：围抢战术已经成为一种较为普遍、最为有效的防守战术；不同的场区。围抢的形式与数量存在差别；现代足球实施围抢战术多在中场的中路与后场。     

成都体育学院体育系92级学生个性初探

运用卡特尔１６项个性因素量表，对体院９２级新生进行心理测试，测试结果经统计分析表明，体院９２级新生在学习、生活上与川大新生存在一定的差距，亟待提高。