具有"物理+能源"特色的物理学研究生创新实验平台的建设与实践

结合学校行业特色及学科特点,构建了具有"物理+能源"特色的物理学研究生创新实验教学体系,建设了现代物理技术与能源工程应用相结合的物理学研究生创新实验平台,改革了实验教学方法及教学模式,完善和建设了网络实验教学资源,建立了有效的实验平台管理运行机制.实践表明,所建立的物理学研究生创新实验平台在研究生培养方面取得了突出的成绩.     

生物化学综合性实验的探索与评价

以河北科技师范学院2005级生物科学、生物技术专业学生为样本,通过对生物化学综合性实验效果的调查,说明综合性实验在突出学生主体地位、激发学生兴趣等方面起到了积极的作用,能够在培养学生团队合作精神、科研能力等多方面综合能力的提升。     

扩招背景下提高实践教学质量的方法研究与实践

探讨了扩招背景下工程训练实践教学面临的机遇和挑战,对工程训练中提高教学质量的方法和途径进行了研究,提出了通过构建工程训练体系、实践教学保障体系和考核评价体系提高实践教学质量的思路,并结合整个教学团队的工作实践,阐述了在实践教学中的应用情况.     

开放物理实验教学模式的探索与实践

在广泛调研和总结经验的基础上,对大学物理实验开放教学模式进行了深入研究,形成比较可行的大学物理实验课程开放教学模式.通过设立创新工作室、网络实验室以及教学内容分层次等措施,实现了实验室硬件资源,实验教学活动在时间、空间和实验内容的深入开放,基本弥补了传统实验教学模式的不足.     

探索高校实验室大型仪器设备管理新模式

高等学校大型仪器设备是从事教学、科研的重要条件和基本手段,是学校综合实力的体现。随着现代科学技术的迅猛发展,知识在经济发展中起到越来越重要的作用,使得高校大型仪器设备的管理显得尤为重要。结合工作实践,以及对目前高校实验室大型仪器设备管理及使用现状的分析,提出了加强高校大型仪器设备管理,提高大型仪器设备使用效率的若干措施。     

入户抢劫“入户”目的非法性之否定

关于入户抢劫是否具备入户目的的非法性历来是学界争论的一个问题,尽管《关于审理抢劫案件具体应用法律问题若干问题的解释》和《关于审理抢劫、抢夺刑事案件适用法律若干问题的意见》都是持肯定的态度。但是从立法本意来看,入户抢劫除了保障财产权之外,更重要的还要保护居民对"户"的信任感和安全感;"入户"目的非法性也并不影响主观有责性的成立和客观违法性的程度;入户方式合法与否也并非刑法所关注的内容,所以入户抢劫并不需要入户时具有非法目的。     

关于Mordell方程y^2=x^3＋k

设l,l1,l2,…,ls为任意整数,n为正整数,n1,n2,…,ns为任意非负整数．用初等数论方法证明了：如果k满足k=（4l＋2）^3-Пi=1^s（4li＋1）^2ni或k=（4l＋3）^3-2^2nПi=1^s（4li＋1）^2ni,则Mordell方程y^2=x^3＋k无整数解．     

Enabling Mg metal anodes rechargeable in conventional electrolytes by fast ionic transport interphase

Rechargeable magnesium batteries have received extensive attention as the Mg anodes possess twice the volumetric capacity of their lithium counterparts and are dendrite-free. However, Mg anodes suffer from surface passivation film in most glyme-based conventional electrolytes, leading to irreversible plating/stripping behavior of Mg. Here we report a facile and safe method to obtain a modified Mg metal anode with a Sn-based artificial layer via ion-exchange and alloying reactions. In the artificial coating layer, Mg₂Sn alloy composites offer a channel for fast ion transport and insulating MgCl₂/SnCl₂ bestows the necessary potential gradient to prevent deposition on the surface. Significant improved ion conductivity of the solid electrolyte interfaces and decreased overpotential of Mg symmetric cells in Mg(TFSI)₂/DME electrolyte are obtained. The coated Mg anodes can sustain a stable plating/stripping process over 4000 cycles at a high current density of 6 mA cm⁻². This finding provides an avenue to facilitate fast ion diffusion kinetics of Mg metal anodes in conventional electrolytes.     

发展中国电子商务的几点思考

“电子商务”这个名词在我国已经不在是陌生的名词了,它已经在中国越来越被人们所认可.什么是电子商务?所谓电子商务(ElectronicCommerce)是利用计算机技术、网络技术和远程通信技术,实现整个商务(买卖)过程中的电子化、数字化和网络化。人们不再是面对面的、看着实实在在的货物、靠纸介质单据(包括现金)进行买卖交易。而是通过网络,通过网上琳琅满目的商品信息、完善的物流配送系统和方便安全的资金结算系统进行交易(买卖)。     

Genomic diversity and post-admixture adaptation in the Uyghurs

Population admixture results in genome-wide combinations of genetic variants derived from different ancestral populations of distinct ancestry, thus providing a unique opportunity for understanding the genetic determinants of phenotypic variation in humans. Here, we used whole-genome sequencing of 92 individuals with high coverage (30–60×) to systematically investigate genomic diversity in the Uyghurs living in Xinjiang, China (XJU), an admixed population of both European-like and East-Asian-like ancestry. The XJU population shows greater genetic diversity, especially a higher proportion of rare variants, compared with their ancestral source populations, corresponding to greater phenotypic diversity of XJU. Admixture-induced functional variants in EDAR were associated with the diversity of facial morphology in XJU. Interestingly, the interaction of functional variants between SLC24A5 and OCA2 likely influences the diversity of skin pigmentation. Notably, selection has seemingly been relaxed or canceled in several genes with significantly biased ancestry, such as HERC2–OCA2. Moreover, signatures of post-admixture adaptation in XJU were identified, including genes related to metabolism (e.g. CYP2D6), digestion (e.g. COL11A1), olfactory perception (e.g. ANO2) and immunity (e.g. HLA). Our results demonstrated population admixture as a driving force, locally or globally, in shaping human genetic and phenotypic diversity as well as in adaptive evolution.