高职大学生就业压力、择业效能感及其关系研究     

万涵宇 《武汉职业技术学院学报》2011,10(2):101-106

采用随机抽样的方式对武汉职业技术学院2010届毕业生进行调查,采用问卷调查的方式了解了高职学生的就业压力源、择业效能感状况,并探讨了两者之间的关系。通过相关分析、t检验、方差分析、回归分析,结果表明,（1）高职学生就业压力普遍较大,其中缺乏求职帮助、专业供求矛盾、自我认识与定位成为就业压力最显著的三个来源。（2）高职生的就业压力有如下特点：女生压力大于男生,文科学生比理工科学生更多面临缺乏求职帮助和专业供求矛盾的压力。城市生在职业素质评价和就业心理预期两方面的压力显著高于农村生;非学生干部就业时的总体压力要普遍高于学生干部。（3）高职学生的择业效能感普遍不高,其中高职大学生在职业目标筛选方面的自信心最强。（4）高职大学生中,文科生在信息收集和制定计划两方面的择业效能感要显著低于理科和工科学生;高职生的择业效能感没有性别、城乡生源、是否学生干部等差异。（5）高职大学生就业压力和择业效能感之间有着密切的相关,其中,职业素质评价、自我认识与定位的压力越小,则高职大学生更有择业效能感。  相似文献   

金樱子多糖对药物性肝损伤小鼠血脂代谢的影响     

皮朝琼  真义才  蔡珊兰  皮建辉 《怀化学院学报》2011,30(11):36-38

为探讨金樱子多糖（RP）对药物性肝损伤小鼠血脂代谢的影响,采用KM小鼠为研究动物,将小鼠平均分为5组（高、中、低剂量组、正常组、模型组）,RP连续灌喂5周．其中第5周的星期一、三、五、日在正常灌胃后2h,除正常组外,其余4组均按5mL／kg腹腔注射0．5％CCl4的花生油溶液,并于末次注射CCl4后18h摘眼球取血,测...  相似文献   

开发支出资本化与企业创新     

冯晓晴  韩艳锦 《科研管理》2020,41(1):60-69

以2007至2017年沪深A股上市公司为研究对象,本文考察了开发支出资本化对企业创新的影响。,实证结果研究发现,开发支出资本化比例与企业创新呈倒U型关系。且结论在稳健性检验之后依然成立。表明：当开发支出资本化比例低于临界值时,由于抑制了管理层通过削减研发投资以实现盈余目标的动机得到抑制,从而促进企业创新;当开发支出资本化比例高于临界值时,促使管理层基于声誉风险管理层为避免将已资本化金额转为费用对当期盈余造成的负面冲击,进行过度研发投资,从而阻碍企业创新。说明不同开发支出资本化比例下,管理层研发投资不同动机对企业创新产生非线性影响。结论在稳健性检验之后依然成立。进一步分析还发现：,开发支出资本化通过研发投资效率作用于企业创新,而且管理层面临的盈余公告压力越大,开发支出资本化对企业创新的非线性影响更为显著。资本化通过非效率研发投资,作用于企业创新;盈余公告压力越大,资本化与企业创新之间的倒U型关系越明显。  相似文献   

IT engagement as a blessing and a curse? Examining its antecedents and outcomes in organizations     

《International Journal of Information Management》2020

Information technology (IT) engagement is defined as a need to spend more time using IT. Practice-based examples show that IT engagement can have adverse effects in organizations. Although users can potentially get more work done through IT engagement, observations show that the users might jeopardize their well-being and hamper their work performance. We aimed to investigate this complexity in the research on IT engagement by examining its potential antecedents and outcomes in organizations. Considering the potentially mixed outcomes, we developed a model to examine the effects of IT engagement on personal productivity and strain. We also aimed to explain the antecedents of IT engagement by drawing on the collective expectations for IT use. In particular, we examined the extent to which normative pressure on IT use drives users’ information load and IT engagement. Finally, we sought to understand whether users’ attempts to avert dependency on IT use reduced their IT engagement. Several hypotheses were developed and tested with survey data of 1091 organizational IT users. The findings help explain the role of normative pressure as a key driver of IT engagement and validate the positive and negative outcomes of IT engagement in organizations.  相似文献   

基于DISLab的两个热学实验设计     

王连友  王艳红 《科教文汇》2020,(8):131-132

本文利用数字化信息实验系统,对大气压影响水的沸点实验和做功改变气体内能两个实验进行了创新设计,实现实验现象与数据显示、图像处理等多模显示同步。学生在实验操作过程中,通过对比实验现象和多模显示内容,能够更加容易地得出相应的实验结论,改变了传统实验中实验现象与数据分析分离的问题。  相似文献   

Experiments on Cu-isotope fractionation between chlorine-bearing fluid and silicate magma: implications for fluid exsolution and porphyry Cu deposits     

Haihao Guo  Ying Xia  Ruixia Bai  Xingchao Zhang  Fang Huang 《国家科学评论(英文版)》2020,7(8):1319

Hydrothermal fluid is essential for transporting metals in the crust and mantle. To explore the potential of Cu isotopes as a tracer of hydrothermal-fluid activity, Cu-isotope fractionation factors between Cl-bearing aqueous fluids and silicate magmas (andesite, dacite, rhyolite dacite, rhyolite and haplogranite) were experimentally calibrated. Fluids containing 1.75–14 wt.% Cl were mixed together with rock powders in Au₉₅Cu₅ alloy capsules, which were equilibrated in cold-seal pressure vessels for 5–13 days at 800–850°C and 2 kbar. The elemental and Cu-isotopic compositions of the recovered aqueous fluid and solid phases were analyzed by (LA-) ICP–MS and multi-collector inductively coupled plasma mass spectrometry, respectively. Our experimental results show that the fluid phases are consistently enriched in heavy Cu isotope (⁶⁵Cu) relative to the coexisting silicates. The Cu-isotope fractionation factor (Δ⁶⁵Cu_FLUID-MELT) ranges from 0.08 ± 0.01‰ to 0.69 ± 0.02‰. The experimental results show that the Cu-isotopic fractionation factors between aqueous fluids and silicates strongly depend on the Cu speciation in the fluids (e.g. CuCl(H₂O), CuCl₂^– and CuCl₃²⁻) and silicate melts (CuO_1/2), suggesting that the exsolved fluids may have higher δ⁶⁵Cu than the residual magmas. Our results suggest the elevated δ⁶⁵Cu values in Cu-enriched rocks could be produced by addition of aqueous fluids exsolved from magmas. Together with previous studies on Cu isotopes in the brine and vapor phases of porphyry deposits, our results are helpful for better understanding Cu-mineralization processes.  相似文献   

220kV变压器线圈现场施压及压板强度研究     

曾劲龙  谭家齐 《中山大学学报论丛》2000,20(1):24-27

对SFPSZ9－150000／220特大型变压器线圈现场施压进行了探讨性的试验，提供了一些可行性的计算方法，分析了试验结果并提出了存在问题与一些合理建议。  相似文献   

太极拳、练功十八法锻炼对老年人血浆t—PA、PAI活性的影响     

程毓闾  袁公亮  韦俊文  赵淮北  徐礼铭 《上海体育学院学报》1995,(3)

对26名坚持太极拳和练功十八法锻炼的老年人,进行了血浆t—PA、PAI活性的测定,并与正常老年人对照组和 CHD组进行了比较。结果显示,坚持太极拳和练功十八法锻炼的老年人,血浆PAI活性明显低于对照组和CHD组。这对防治AS、CHD等疾病有积极的意义。  相似文献   

不同位置男篮运动员血乳酸与心率的测定   总被引：2，自引：0，他引：2  

孙鲁岷 《上海体育学院学报》1995,(2)

通过对体育学院篮球专项学生比赛时血乳酸和心率的测定,发现运动员血乳酸值的增加具有显著的统计学意义,且不同位置的运动员血乳酸值并不相同,其比赛时能量供应的特征也不一样。  相似文献   

Impact absorption of tennis shoe-surface combinations     

S.?J.?DixonEmail author  V.?H.?Stiles 《Sports Engineering》2003,6(1):1-9

The aim of this study was to investigate, for typical shoes and surfaces used in tennis, the relative role of the shoe and surface in providing cushioning during running. Five test surfaces ranging from concrete to artificial turf were selected, together with two shoe models. Impact absorbing ability was assessed mechanically using drop test procedures and biomechanically using peak magnitude and rate of loading of impact force and peak in-shoe pressure data at the lateral heel. Differences in biomechanical variables between shoe-surface combinations were identified using a two-way ANOVA (p < 0.05). Mechanical test results were found to rank the surfaces in the same order regardless of the shoe model, suggesting that the surface is influential in providing cushioning. However, for all mechanical and biomechanical (p < 0.05) variables representing impact absorbing ability, it was found that the difference between shoes was markedly greater than the differences between surfaces. The peak heel pressure data were found to rank the surfaces in the same order as the mechanical tests, while impact force data were not as sensitive to the changes in surface. Correlations between mechanical and biomechanical impact absorption highlighted the importance of testing the shoe-surface combination in mechanical tests, rather than the surface alone. In conclusion, mechanical testing of the shoe-surface combination was found to provide a strong predictor of the impact absorbing ability during running if pressure data were used. In addition, for typical shoe-surface combinations in tennis, the shoe was found to have more potential than the surface to influence impact loading during running. Finally, in-shoe pressure data were found to be more sensitive than force plate data to changes in material cushioning.  相似文献