基于价值主张与动态能力互动的企业资源配置案例研究

在消费升级的大环境下,价值主张精确地传达产品的价值优势并指导资源的有效配置,能够促使企业通过优化配置资源更好地满足市场需求以获取竞争地位。采用扎根理论的研究方法透过企业资源配置现象的典型案例构建理论框架,剖析价值主张与动态能力的互动对资源配置的影响机理及其演进过程。研究表明：（1）在不同情境因素的诱发下,价值主张与动态能力快速互动调整达到相适配,进而保证价值主张的有效性并促使能力发挥到极致以完成预期目标;（2）企业依据价值主张提炼出合理的资源配置决策,并由与价值主张相匹配的动态能力作为支柱性要素对资源进行改造利用,使资源配置在价值主张与动态能力的作用下表现为“简单拼凑式-探索开发式-协奏共享式”的演进过程。本研究结论对于企业如何通过清晰的价值主张进行有效资源配置以获取竞争优势有着重要理论和实践意义。     

新建地方本科院校教师本科教学胜任力与工作绩效的关系研究——以新余学院为例

本研究通过对新余学院50名教师进行问卷调查,来探讨教师本科教学胜任力与工作绩效的关系。结果发现:胜任力及各因子对工作绩效、任务绩效、人际促进因子和工作奉献因子都有显著的正向预测作用。     

Surface superconductivity in the type II Weyl semimetal TaIrTe4

The search for unconventional superconductivity in Weyl semimetal materials is currently an exciting pursuit, since such superconducting phases could potentially be topologically non-trivial and host exotic Majorana modes. The layered material TaIrTe₄ is a newly predicted time-reversal invariant type II Weyl semimetal with the minimum number of Weyl points. Here, we report the discovery of surface superconductivity in Weyl semimetal TaIrTe₄. Our scanning tunneling microscopy/spectroscopy (STM/STS) visualizes Fermi arc surface states of TaIrTe₄ that are consistent with the previous angle-resolved photoemission spectroscopy results. By a systematic study based on STS at ultralow temperature, we observe uniform superconducting gaps on the sample surface. The superconductivity is further confirmed by electrical transport measurements at ultralow temperature, with an onset transition temperature (T_c) up to 1.54 K being observed. The normalized upper critical field h*(T/T_c) behavior and the stability of the superconductivity against the ferromagnet indicate that the discovered superconductivity is unconventional with the p-wave pairing. The systematic STS, and thickness- and angular-dependent transport measurements reveal that the detected superconductivity is quasi-1D and occurs in the surface states. The discovery of the surface superconductivity in TaIrTe₄ provides a new novel platform to explore topological superconductivity and Majorana modes.     

Convergent genomic signatures of high-altitude adaptation among domestic mammals

Abundant and diverse domestic mammals living on the Tibetan Plateau provide useful materials for investigating adaptive evolution and genetic convergence. Here, we used 327 genomes from horses, sheep, goats, cattle, pigs and dogs living at both high and low altitudes, including 73 genomes generated for this study, to disentangle the genetic mechanisms underlying local adaptation of domestic mammals. Although molecular convergence is comparatively rare at the DNA sequence level, we found convergent signature of positive selection at the gene level, particularly the EPAS1 gene in these Tibetan domestic mammals. We also reported a potential function in response to hypoxia for the gene C10orf67, which underwent positive selection in three of the domestic mammals. Our data provide an insight into adaptive evolution of high-altitude domestic mammals, and should facilitate the search for additional novel genes involved in the hypoxia response pathway.     

基于GOCI影像的杭州PM2.5遥感建模及时空变异分析

地球静止卫星上的GOCI(geostationary ocean color imager)传感器具有较高的时间分辨率,在研究短时间尺度内大气PM2.5浓度时空变化方面具有一定的应用潜力.本文根据GOCI影像的波段特征,利用2011-2013年实测PM2.5浓度、大气气溶胶光学厚度(aerosol optical depth,AOD)与气象因子数据,分别进行了GOCI PM2.5浓度单变量和多变量反演建模研究,并结合2013年12月6日的GOCI AOD数据,实现了单日杭州市PM25浓度遥感反演与时空变异分析.结果表明:在单变量模型中,分季节模型的平均相对误差最高值28.11％比年度模型的平均相对误差34.04％低,分季节模型精度优于年度模型;单变量模型的平均相对误差34.04％比多变量模型的平均相对误差48.96％低,单变量模型精度优于多变量模型;把单变量冬季模型应用于杭州GOCI AOD数据,得出逐时大气PM2.5的空间分布,并计算了PM2.5浓度的变异系数,发现杭州各区县变异系数大都在0.5以下,东部和北部的数值较高,中西部地区的值较低.     

石墨烯薄膜技术发展综述 ——基于DII数据库的分析

通过对石墨烯薄膜技术专利数量的时间序列统计,形成技术发展趋势图,分析石墨烯薄膜技术的发展波动规律.研究表明,石墨烯薄膜技术总体态势呈现上升式循环发展,专利数量逐年增长;波动特征主要表现为大涨大落,波长较短,波幅逐步扩大.发展波动受政府专项计划、技术突破点、研究主体数量变化和技术应用领域拓展等因素影响.构建石墨烯薄膜技术发展波动周期预测模型,使用现有的专利数据,对石墨烯薄膜技术未来10年的发展趋势进行合理预测,为制定石墨烯薄膜技术战略和产业政策提供参考.     

银川市水资源胁迫与生态系统健康状况研究

银川市地处银川平原腹地,属于北方干旱地区之一。水资源和生态环境对当地社会经济发展具有强约束力。用水资源压力指数、水资源供需平衡、生态系统健康3种方法对银川市水资源胁迫度和生态系统健康状况进行评价。结果表明：银川市人均水资源占有量为2526m^3/年,人均水资源压力属轻度缺水状态,当地地下水资源利用率为32．2％,水资源利用压力指数呈现中高压力状态,两者结果不一致的原因是城市生活和工业使用地下水,农业使用黄河水的“二元”用水结构造成;城市水资源利用均超过了水资源的“安全线”,局部年份靠近“警戒线”,未来城市发展受水资源胁迫度较大,大幅度农业节水会影响地下水补给,进而对银川平原生态安全构成威胁;城市生态系统健康评价结果为0．418,隶属于不健康水平,原因是组织能力（0.400）、发展能力（0．368）和生活质量（0．578）均呈不健康状态。最后,建议银川市应该以节约型和生态型理念为发展的主导思路,即在干旱区建设生态节水型城市。     

浅析电子技术在现代汽车工业中的发展与应用

随着汽车工业的发展,电子技术在现代汽车上应用越来越广泛,电子技术的应用对于改进汽车性能、提高行驶安全、降低污染、节约能源有着常重要的作用。文章就汽车电子技术的发展、应用、发展趋势及应用前景进行了综述。     

Academic users’ interactions with ScienceDirect in search tasks: Affective and cognitive behaviors

This article presents part of phase 2 of a research project funded by the NSF-National Science Digital Library Project, which observed how academic users interact with the ScienceDirect information retrieval system for simulated class-related assignments. The ultimate goal of the project is twofold: (1) to find ways to improve science and engineering students’ use of science e-journal systems; (2) to develop methods to measure user interaction behaviors. Process-tracing technique recorded participants’ processes and interaction behaviors that are measurable; think-aloud protocol captured participants’ affective and cognitive verbalizations; pre- and post-search questionnaires solicited demographic information, prior experience with the system, and comments. We explored possible relationships between affective feelings and cognitive behaviors. During search interactions both feelings and thoughts occurred frequently. Positive feelings were more common and were associated more often with thoughts about results. Negative feelings were associated more often with thoughts related to the system, search strategy, and task. Learning styles are also examined as a factor influencing behavior. Engineering graduate students with an assimilating learning style searched longer and paused less than those with a converging learning style. Further exploration of learning styles is suggested.     

高校科技创新能力评价指标体系研究

高校科技创新能力评价是目前高校科技发展的重要研究领域之一.高校科技创新能力应该包括两个方面:知识创新能力和解决社会生产实际问题中的技术创新能力.对高校科技创新能力的评价也应该包括这两个方面.在广泛调研的基础上,建立起高校科技创新能力评价指标体系,并对研究结果进行介绍.