小议被害人学

被害人学,作为一门新兴的学科,无论是从理论层次上考察,还是在实践操作中,都面临着挑战。而作为被害人学之基础和核心部分的被害人,更是学界讨论的重点部分。现今,在该领域研究最多的是被害人诉讼权利保护和被害人赔偿等问题。然而,目前的研究思路多倾向于刑事诉讼法角度,涉及刑法思维的比较少。在作者看来,如果能在刑法中找到合适的点,融入被害人的权利以及相关内容,即是对被害人在实体法上的肯定与规范。此种研究路径扩展了被害人学的研究视野,而且也必将对被害人相关制度的构建提供更为坚实的基础。     

如何提高独立学院大学物理实验教学质量

根据独立学院培养应用型人才的目标,结合本院的实际教学情况,主要从学校、教师和学生3个层面分析独立学院大学物理实验教学的现状以及遇到的难题,探讨提升教学质量的方法,针对教学模式、教学内容和教学理念展开讨论,提出教学改革方向.     

微生物教学实验室生物安全的探索与研究

安全稳定是当今高校快速发展的根本保障,是建设和谐校园、平安校园的切入点和着力点。北京工业大学生命科学与生物工程学院微生物教学实验室,是伴随招收生物技术研究方向的本科生而诞生的专业基础教学实验室。由于教学和科研的密切关系,在病毒与药理研究室生物安全实践的基础上,从微生物教学实验室的特点等4个方面,对微生物教学实验室的生物安全问题进行有益的探索与研究,不仅提升师生的安全意识,同时有效促进实验教学的改革和创新。     

网络课程的内容进化机制设计与技术实现

当前我国网络课程建设与应用普遍存在以下问题:课程内容结构封闭和更新迟缓,教学形式具有单向传递性;课程内容与学习活动在应用上的分离,影响学生主体地位的发挥;不同教学学期衔接或课程内容在不同教师间共享时,教学过程中的生成性资源存在丢失的现象。因此,探讨如何根据网络课程内容进化理念,提供相应的环境与机制,从而促进学习内容、教师及学生三者在网络教学过程中的交互,并通过积聚大众智慧来促进课程内容的动态发展,对于提高网络课程教学质量具有重要意义。     

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.     

太极拳桩功对改善骨盆前倾的作用

在现代信息化生活中,网络已全面侵入我们的日常生活,儿童少年乃至老年人都在使用手机、电脑。由于长期不良的久坐姿势会造成人体形态的改变。其中在青年人中骨盆前倾尤为常见。本文主要运用文献法、问卷调查法从造成骨盆前倾的原因及对人体的危害上进行阐述,引起人们重视,继而提出卷腹运动、太极拳桩功对骨盆前倾的改善方法。     

一次性塑料快餐盒盖成型工艺分析及逆向设计

采用逆向思维方法,详细分析了一次性快餐盒盖的成型工艺,并对其结构进行改进设计。为那些以实物为制造基础的产品的设计提供了借鉴,在缩短产品开发周期,提高经济效益方面,起着重要作用。     

语类教学法对我国民族地区多语教育的启示

我国少数民族地区学生由于缺乏进入高层社会和获得经济资本语言资源的通道而被边缘化,导致他们在学习中语言水平很难提升,总体竞争力不强.本文通过引介悉尼学派语类教学法,分析其发展历程、理论基础及教学方法,进而结合少数民族学生多语学习特征,从使用民族学生母语拉近编码取向距离、强化和再语境化语类知识两个方面得出语类教学法对我国少...     

Injectable hybrid inorganic nanoscaffold as rapid stem cell assembly template for cartilage repair

Cartilage injuries are often devastating and most cannot be cured because of the intrinsically low regenerative capacity of cartilage tissues. Although stem-cell therapy has shown enormous potential for cartilage repair, the therapeutic outcome has been restricted by low survival rates and poor chondrocyte differentiation in vivo. Here, we report an injectable hybrid inorganic (IHI) nanoscaffold that facilitates fast assembly, enhances survival and regulates chondrogenic differentiation of stem cells. IHI nanoscaffolds that strongly bind to extracellular matrix (ECM) proteins assemble stem cells through synergistic 3D cell–cell and cell–matrix interactions, creating a favorable physical microenvironment for stem-cell survival and differentiation in vitro and in vivo. Additionally, chondrogenic factors can be loaded into nanoscaffolds with a high capacity, which allows deep, homogenous drug delivery into assembled 3D stem-cell-derived tissues for effective control over the soluble microenvironment of stem cells. The developed IHI nanoscaffolds that assemble with stem cells are injectable. They also scavenge reactive oxygen species and timely biodegrade for proper integration into injured cartilage tissues. Implantation of stem-cell-assembled IHI nanoscaffolds into injured cartilage results in accelerated tissue regeneration and functional recovery. By establishing our IHI nanoscaffold-templated 3D stem-cell assembly method, we provide a promising approach to better overcoming the inhibitory microenvironment associated with cartilage injuries and to advance current stem-cell-based tissue engineering.     

MPI下矩阵相乘的实现与分析

随着多核处理器及并行计算机的发展,并行程序设计在高性能计算及进程通信等领域得到更广泛的应用。而MPI(Message Passing Interface消息传递接口)作为目前最重要的并行编程工具,提供了丰富的消息传递库函数,极大方便了并行算法的实现。本文首先介绍并行计算及MPI的基本内容,然后在MPI并行计算环境下实现了一种n×n阶矩阵相乘的并行算法,并与传统的串行算法进行了性能方面的分析和比较。