X5045在智能低压综合保护装置中的应用

X5045芯片是美国Xicor公司生产的集“看门狗”定时器、电压监控和串行E2PROM三项功能于一体的专用集成芯片。本文介绍了X5045芯片的结构、功能、工作原理以及X5045在智能低压综合保护装置中的应用,给出了X5045芯片与AT89S52单片机的硬件接口电路,编写出相应C51应用程序,并成功应用于低压综合保护装置中,取得了令人满意的效果。     

Rotenone induces more serious learning and memory impairment than α-synuclein A30P does in Drosophila

Parkinson’s disease (PD) is a heterogenous disease caused by multifactorial etiology. PD is characterized by the loss of dopaminergic (DA) neurons in the substantia nigra and the accumulation of Lewy bodies. In this study, two Drosophila PD models by exposing Drosophila to rotenone (sporadic PD models) are proposed, and the human α-synuclein A30P protein (family PD models) in Drosophila is expressed respectively. Both models recapitulated the main human PD symptoms including the loss of dopaminergic neurons...     

脆性X染色体综合征的临床检测方法研究

目的是建立一种简便、快捷的脆性X染色体综合征的临床检测方法.在常规PCR的基础上,采用热启动法,同时加入PCR增强剂Btaine、DMSO,对20例表型正常人群外周血样本进行FMR1基因（CGG）n重复序列检测.结果表明,改良后的FMR1基因PCR扩增技术能够高效扩增CG富集区,采用该方法我们检测了20例外周血样本均获得目标片段,PCR扩增产物片段长度400～500bp（相当于n=20～53）.因此,该方法简便、快速、经济而且重复性好,可用于群体普查和门诊快速筛查脆性X染色体综合征.     

基于情绪理论的企业X低效率恶化机理解释

经济学家哈维.莱宾斯坦提出的"X低效率理论",被视为20世纪经济学上的一大发现,X低效率问题被列为当今世界十大管理难题之一,至今未能得到令人信服的解决,而X低效率造成的损失非常巨大。那么继续研究和完善X低效率的来源问题不仅具有重大的理论意义,也同时具有现实意义。     

The innovative performance of in-house and contracted R&D in terms of patents and utility models

The standard empirical framework for analysing the R&D-patents relationship is widened both by examining the different role of in-house and contracted R&D in the innovative performance of firms, and by considering patents and utility models counts as measures of innovation output. Patents and utility models are considered to approximate for significant and incremental innovations, respectively. Applying count data econometrics to a panel data set of Spanish manufacturing firms surveyed in the period 1990-1996, a transcendental production function is estimated, which allows for non-constant elasticities of the R&D inputs. The results indicate that significant innovations are mainly gestated in-house, whereas contracted R&D seems more orientated towards innovations of incremental nature.     

Commercialization of patents and external financing during the R&D phase

Using a unique database on Swedish patents owned by small firms and individuals, survival models estimate how different factors influence the decision to commercialize the patents. Such an analysis has seemingly never previously been undertaken. Since the owners know more about the patents than potential external financiers, problems related to asymmetrical information are present. To overcome these problems when inventors and small technology-based firms need financing, Sweden has for a long time relied on government support rather than private venture capital firms. The empirical results show that the larger is the share of patent-owners’ costs covered by government financial support during the R&D phase, the lower is the probability of patents being commercialized. This lower degree of commercialization is likely to depend on (1) the soft terms of the government loans, where the patent owner can avoid paying back the loan if the patent is never commercialized and/or (2) that the government is not able to select promising projects. The first explanation is related to moral hazard and the second one to adverse selection. The policy suggestion is for government to change the design of the loans, to base them on firms rather than projects.     

以“区校共建”模式促进市民体育生活圈建设——以上海市长白社区与上海理工大学为例

采用文献资料、问卷调查、数理统计等研究方法,对上海市长白社区与上海理工大学通过“区校共建”模式来推动市民“30分钟体育生活圈”的建设进行实地调查研究。主要结论：“区校共建”模式符合社区居民参加体育锻炼活动的时空要求;可以充分整合现有资源来满足社区居民的体育场馆要求和体育锻炼活动多样化的需求;对市民体育锻炼行为产生了积极的影响;可以充分发挥高校对社区体育的健身指导和组织功能。实践证明,通过此模式可以充分发挥社区所辖高校的辐射功能,建立起以高校为核心的社区健身圈,从而促进市民体育生活圈的发展。     

基于ActiGraph GT3X监测网球运动能量消耗的研究

目的:应用ActiGraph GT3X对网球运动等非周期性运动能量消耗进行测评,建立适合网球运动能耗预测的回归方程,从而丰富ActiGraph测量体系.方法:以K4b2测量值作为校标,分别在拍柄、持拍手手腕外侧、腰部髂肌外侧、大腿中央前侧和脚踝外侧(持拍手同一侧肢体)各佩戴一个加速度计(ActiGraph GT3X),同步对网球运动中不同球速下(30 km/h、60 km/h)的原地正、反手击球,侧向移动正、反手击球,向前移动正、反手击球,侧向移动正反手交替击球和模拟自由单打的运动过程进行监测.结果:腰部、大腿和踝关节部位GT3X的EE和MET预测值存在明显低估,与K4b2测量值一致性较低;手腕和拍柄部位GT3X的EE和MET预测值存在明显高估,与K4b2测量值一致性较低;研究建立了2个网球运动能耗预测回归方程,经检验其预测值与实测值没有显著性差异.结论:运用ActiGraph GT3X对网球等隔网对抗运动项目进行监测存在显著误差,EE和MET的预测存在明显高估或低估的现象;基于ActiGraph GT3X所建立的能耗预测方程能对网球运动进行有效的运动监测.     

利用Web3D技术开发基于Web的虚拟实验环境

Web3D技术是基于互联网的3D图形渲染技术。目前,网页的大多数动画都是以Flash为主导的2D动画,但随着Web3D技术的进步,网络带宽的快速增长,相信网页上的3D图形动画应用会出现不断丰富与繁荣的局面。本文试图讨论Web3D的主要关键技术,并介绍我们在开发基于Web的虚拟仿真实验环境时所采用的技术思路和方案。