基于单片机C8051F350的温度测量系统设计

以铂电阻PT1000为温度传感器,以C8051F350单片机为控制核心,设计了一种高精度温度测量系统,测量结果以数字方式显示.     

一款基于HOLTEK MCU的智能玩具的设计与实现

以HT46F49E为核心芯片,DS18B20、DHT11、ISD1760、SST89E516RD为辅助芯片,设计了一种家庭玩具或用品.它用温度传感器、湿度传感器实现温度和湿度的数据采集,通过LCD240128来显示温湿度、模拟时钟,并动态地显示＂喜洋洋＂的表情.其表情会随环境温度、湿度的变化而变化,并发出温馨的语音提示.     

基于自然语言词对法的文献主题新颖性探测研究

[目的/意义] 提出一个全新的量化指标--文档主题新颖度,通过自然语言词对方法对文献主题内容的新颖性进行探测研究,并探讨其可行性和优缺点以及新颖度与F1000推荐文献和引文指标之间的关系。[方法/过程] 以F1000为基础,选取hematology主题近一个月内推荐的文献,在Pubmed中查找并获取该推荐文献发表之前6个月内密切相关的文献,构成整个文献集。定义自然语言法新颖度的概念、计算公式并利用Oracle数据库PL/SQL语言进行编程,通过MetaMap软件提取自然语言词汇进行文献主题新颖度的运算。[结果/结论] 自然语言法在文献主题新颖性探测的运算上具有一定的可行性;文档主题新颖度与F1000推荐文献、引用情况并非成等价关系,分属于科技论文评价的不同维度、不同范畴,不可一概而论。应将文档主题新颖度这一新指标与同行评议情况和文献计量学等其他相关论文评价指标结合起来对文献进行综合评价分析,选取优质文献给予推荐。     

基于绿色发展理念下开发区PPP项目的关键成功因素研究

基于绿色发展理念视角下构建开发区PPP项目关键成功影响因素指标体系,采取ISM和F-ANP相结合的方法对PPP项目成功影响因素的关联性和重要性进行分析,并得出其关键成功因素的影响程度权重值综合排序。研究表明,绿色PPP项目经验与技能、政府监管持续性和政府对项目支持意愿是开发区绿色PPP项目关键成功影响因素中的深层次因素,是引导社会资本参与并积极实施绿色生产技术的核心推动力,进而对最终提供的产品和服务的质量和效率产生影响。     

Intellectual property infringements due to R&D abroad? A comparative analysis between firms with international and domestic innovation activities

This paper aims to analyse the risk of intellectual property (IP) infringements by competitors from abroad and in particular to consider whether this risk is higher for international innovating firms. We distinguish three different types of IP infringements from abroad: the usage of firms’ technical inventions, product piracy, and copying of corporate names and designs. Our analysis rests on the German data from the Europe-wide Community Innovation Survey (CIS). We use a unique data set of about 900 observations, which are retrieved from two survey waves. While the earlier wave contains information about international and domestic innovation activities, the later wave reports IP infringements. In a second analysis, the likelihood of infringements from innovation host countries and no-innovation host countries abroad is examined. Before the empirical analysis, an exploratory study was carried out in China with interviews of German firms with innovation activities in China and with a legal advisor for small and medium-sized German enterprises. The results show that firms with international R&D activities are increasing their chances of losing technological knowledge to their local competitors abroad. R&D activities in countries with weak intellectual property rights increase the risk for all types of IP infringements compared to domestic R&D activities. Infringements by competitors from the host country are driven by the production of new produces in this country. Export intensity is the major driver of infringements from no-innovation host countries. R&D activities in China and North America also increase the risk of an infringement. However, firms that innovate only in their home country experience significantly more product piracy cases than international innovating firms.     

Four New Corrected Statistics for SEM With Small Samples and Nonnormally Distributed Data

When the assumption of multivariate normality is violated and the sample sizes are relatively small, existing test statistics such as the likelihood ratio statistic and Satorra–Bentler’s rescaled and adjusted statistics often fail to provide reliable assessment of overall model fit. This article proposes four new corrected statistics, aiming for better model evaluation with nonnormally distributed data at small sample sizes. A Monte Carlo study is conducted to compare the performances of the four corrected statistics against those of existing statistics regarding Type I error rate. Results show that the performances of the four new statistics are relatively stable compared with those of existing statistics. In particular, Type I error rates of a new statistic are close to the nominal level across all sample sizes under a condition of asymptotic robustness. Other new statistics also exhibit improved Type I error control, especially with nonnormally distributed data at small sample sizes.     

2000～2005年《青岛职业技术学院学报》载文及作者统计分析

运用文献计量学的统计方法，对2000-2005年出版的《青岛职业技术学院学报》（2000-2002年原刊名为《青岛教育学院学报》）从学报的载文量及篇密度，作者年龄、职称、性别，作者地域分布，载文分类比较等方面进行统计，分析该刊6年来的发文特点及载文作者的总体状况，以期为学报今后的发展找出方向。     

BX_3与C=C之间p-π作用的量子化学研究

用量子化学计算方法对BX3(X=H,F,Cl)与C‖C之间通过p-π作用形成的复合物进行了研究.计算结果表明,各复合物中BX3均位于π键的上方,并且偏向于氢原子数较多的碳原子一侧.BH3与C‖C的作用是由π键中的电子通过向B的空p轨道转移而形成,但BF3和BCl3与C‖C的作用只是通过微弱的分子间作用力结合,复合物的形成使分子的振动光谱随作用的强弱而出现一定的红移现象.     

New Ways to Evaluate Goodness of Fit: A Note on Using Equivalence Testing to Assess Structural Equation Models

Structural equation models are typically evaluated on the basis of goodness-of-fit indexes. Despite their popularity, agreeing what value these indexes should attain to confidently decide between the acceptance and rejection of a model has been greatly debated. A recently proposed approach by means of equivalence testing has been recommended as a superior way to evaluate the goodness of fit of models. The approach has also been proposed as providing a necessary vehicle that can be used to advance the inferential nature of structural equation modeling as a confirmatory tool. The purpose of this article is to introduce readers to key ideas in equivalence testing and illustrate its use for conducting model–data fit assessments. Two confirmatory factor analysis models in which a priori specified latent variable models with known structure and tested against data are used as examples. It is advocated that whenever the goodness of fit of a model is to be assessed researchers should always examine the resulting values obtained via the equivalence testing approach.     

四种语义类名词槽系的初步研究

现代汉语的槽关系是汉语语义系统的一个重要的组成部分,对具体名词或某类名词来说,其所能搭配的槽类、槽序和槽系是不同的,这些不同便显示出各个或各类名词的区别性特征。槽系,即一类名词可以搭配的定语的槽类数。对名词的槽系进行统计,进而详细描写出名词前面的槽系,对中文信息处理和对外汉语教学都有实际的应用价值。