粤﹑苏﹑鲁﹑浙四省科技进步贡献率比较分析

为探索科技进步对粤﹑苏﹑鲁﹑浙四个省份经济发展的贡献,基于增长速度方程模型及收集的四省1990—2009年统计数据,对四省份科技进步贡献率进行测算,结果表明科技进步对四省的经济贡献率时高时低,呈现不稳定态势。并从广义角度对影响科技进步率的因素进行分析。     

企业信息门户中网络蜘蛛的设计与实现

根据企业门户中信息更新的特点,结合企业门户信息检索的要求,在蜘蛛程序搜索策略中提出基于重要Web页面的增量获取思想,并利用多线程技术,设计应用于企业门户信息搜集的网络蜘蛛,使网络蜘蛛的搜索效率得到了提高。     

“利用”与“探索”在组织学习与技术创新领域的研究视角整合

"利用"与"探索"这一对概念成为组织学习与技术创新领域研究的共同焦点。分别解释为利用式—探索式学习与渐进性—突破性创新。这其中出现了许多混淆与重叠,主要表现为两类学习与两类创新之间关系视角的混乱。通过对相关领域国内外主要文献全面、系统地归纳,最终厘清了"利用"与"探索"在这两个领域中的三种关系视角:对应、融合和过程—结果。在此基础上对未来研究进行了展望。     

An examination of the Counting Talk Test’s ability to discern individual variability in exercise-induced metabolic stress

The purpose of this study was to determine if the counting talk test can be used to discern whether an individual is exercising above or at/below maximal lactate steady state. Twenty-two participants completed VO₂peak and counting talk test incremental step tests followed by an endurance test at 65% of work rate at VO₂peak (WR_VO2peak). The change in relative count time during endurance exercise decreased in those exercising above maximal lactate steady state only (p < .01); however, this change was less than 1 second. Despite a significant correlation during the incremental step test, large changes in counting talk test performance and blood lactate concentration occurred at different points and there was considerable inter-individual variability in counting talk test performance at a given blood lactate concentration. These results suggest that the counting talk test cannot discern whether an individual is exercising above maximal lactate steady state and that it cannot be used to accurately prescribe intensities targeting specific blood lactate concentrations.     

Is the incremental theory of intelligence a key to students’ motivational engagement? The moderating effects of self-enhancement and self-criticism

The incremental theory of intelligence has been identified as a strong predictor of students’ learning motivation. Recent research has suggested various moderators of its effect. The present study sought to examine the moderating effects of self-enhancement and self-criticism on the relation between incremental intelligence beliefs and students’ motivational engagement. Responses were collected from 440 junior secondary school students in Macau. The results showed that self-enhancement strengthened the effect of incremental beliefs on students’ efforts after a perceived failure. Self-criticism strengthened the effect of incremental beliefs on efforts after a perceived success. The reasons for these findings are discussed and their pedagogical implications elucidated.     

短时间力竭运动血清生长激素水平与血糖和血乳酸浓度相关性研究

测定了男性大学生短时间力竭运动前后不同时刻血清GH、BG和LA的浓度。结果显示:短时间力竭运动后即刻BG浓度显著高于运动前安静值(P<0 01);运动后30min、运动后60min时BG浓度与安静值无显著性差异,运动后BG浓度呈恢复趋势;运动后即刻、运动后30min时血液LA水平显著高于运动前安静值(P<0 01),运动后60min时LA水平高于运动前安静值(P<0 05),呈恢复趋势;短时间力竭运动后血液LA浓度的变化与GH浓度的变化呈显著正相关(r=0 83,P<0 01)。研究认为,剧烈运动后血液LA水平与GH水平所表现出的相关性有可能是两者与运动强度的相关,安静时低BG所引起的GH分泌增多取决于中枢对BG代谢的利用性,而非血液BG水平。     

一种基于Kettle的无损增量数据同步方法研究

在学校各系统运行管理过程中,产生了大量宝贵的数据资源,这些数据对学校重要决策制定及传统教育模式改革有着极其重要的作用。因此,如何将不同维度的数据采集到统一的数据中心便成为大数据研究的重点之一。在数据采集过程中,很多学校没有保存重要的历史数据以及已删除记录的状态标记,将对数据分析中诸如时间切片分析、历史状态分析等产生致命影响。以学校人事系统为例,提出一种基于Kettle的无损增量数据同步方法。该方法利用全量数据比对方式,找出新增、修改和删除的数据,并对其进行详细记录,从而实现了对历史数据的完整保留,弥补了如时间切片分析等数据分析策略中数据不足的缺陷。     

Scaffolding students' use of learner-generated content in a technology-enhanced inquiry learning environment

Having students inspect and use each other's work is a promising way to advance inquiry-based science learning. Research has nevertheless shown that additional guidance is needed for students to take full advantage of the work produced by their peers. The present study investigated whether scaffolding through an integrated support tool could bring about the desired effect. This tool was embedded in an online inquiry learning environment and outlined the steps in searching for information in peer-created concept maps. It also contained specific directions to assess the quality of the retrieved information. The effectiveness of this search guidance tool was investigated during an inquiry-based science project. Main results indicated that high school students who were supported by the tool (n?=?19) developed a more differentiated and interconnected conceptual understanding than students who did not receive this scaffold (n?=?23). However, the search guidance tool also seemed to put additional demands on students' self-regulatory abilities, and might therefore require some practice or regulatory support to reach its full potential.     

位移控制法在钢筋混凝土非线性分析中的应用

用位移控制法能够跟踪结构从开始加荷载直到玻坏的整个过程.介绍位移控制法的原理、具体实施过程,并将其用于钢筋混凝土双向偏压构件的非线性分析,计算结果与其它文献数据和试验数据很吻合.     

旅游业是国民经济发展新的增长点

改革开放以来,中国旅游经济获得了迅猛发展,旅游业已经成为许多地方新的经济增长点。它促进区域经济发展、改善地区经济结构,带动了一大批相关产业的发展,同时,它创造就业空间大,还可以扩大内需、创汇和实现利税,已成为促进整个国民经济发展新的增长点。