Hydrogen permeation behavior in Fe3Al-based alloy

Ultra-high vacuum gaseous hydrogen permeation experiments on Fe₃Al-based alloy were performed in the temperature range of 330∼450°C with an upstream hydrogen pressure between 3. 38×10⁴ Pa and 7.28×10⁴ Pa. The results show that the hydrogen diffusivity and permeability in Fe₃Al-based alloy obey Arrhenius relationship in the experimental temperature range and the hydrogen permeation process is controlled by the lattice diffusion of hydrogen at relative high temperature. The activation energy of hydrogen diffusion in the Fe₃Al-based alloy was found to be 75 kJ/mol. Supported by the National Natural Science Foundation of China (59895157)     

Properties of YBa2Cu3O7-∞ granular Josephson junction

YBa₂Cu₃O_7-∞ weak link junctions with width from 0.1 mm to 0.3 mm and length from 0.2 mm to 0.5 mm was made by hand with a razor blade. The current voltage characteristics of the microbridges show, under microwave irradiation, pronounced Shapiro steps up to transition temperature. A careful measurement of the dependence of the critical supercurrent on the external magnetic field and laser light is presented.     

东亚及西太平洋地壳上地幔P波三维速度结构

利用ISC报告中170550条P波到时资料(地震数为12500,台站数为928个,且地震和台站都分布在研究区内),对东亚及西太平洋边缘海(60°E～150°E,10°S～60°N)的深至300km的地壳上地幔三维速度结构进行了研究,分辨率达2°×2°.初步结果表明:(1)在研究区域内东西两部分的岩石圈与上地幔低速带的结构有非常明显的差异.横向上大体以108°E为界,纵向上以90km深度为界,东部与西部P波速度结构差异较大.西部是岩石圈汇聚增厚区,东部是岩石圈拉张减薄区.西部上地幔低速带不发育,东部低速带比西部厚.(2)青藏高原地壳岩石圈巨厚,上地幔低速带不明显.印度次大陆岩石圈板片以低角度下插到青藏高原之下.(3)日本海和菲律宾海地壳之下有高速体,可能是太平洋板块向东俯冲产生的.     

“后《阿凡达》”时代的电影艺术现实构建

电影艺术现实的建构,是电影理论长期以来关注的重要问题。《阿凡达》的出现掀起了一波新的有关于构建电影虚拟现实的浪潮,为营造更加逼真的电影现实,实现电影的真实提供了新的手段。但是,与此同时,电影作为艺术所具有的审美层面的自我确证功能也随之受到威胁。这种威胁既来自于对新的技术本身的过度追求,也来自于为了奇观异景的创作而对电影的文化诉求的忽视。     

浅论高校网络思想政治教育工作体系的构建

本文探索提出了构建高校网络思想政治教育的"1+2+3+4"工作体系,即坚持服务大学生全面发展这一个中心,建设"红色网站"和"微平台"这两块阵地,突出高校网络思想政治教育内容建设、形式创新和主体提升这三大抓手,建立领导协调机制、监管防范机制、应急处理机制和管理保障机制这四项机制。     

Physical environment as a 3-D textbook: design and development of a prototype

The use of the physical environment as a three-dimensional (3-D) textbook is not a common practice in educational facilities design. Previous researches documented that little progress has been made to incorporate environmental education (EE) into architecture, especially among the conventional designers who are often constrained by the budget and building area requirements. This article presents an exploratory project to develop a prototype for the 3-D textbook. The author does not formulate ideas and concept based on the pre-determined specs in a design brief. Instead, the design solution evolved through a qualitative case study conducted at the Green School in Bali, Indonesia. Data were collected through a series of interviews and on-site observations. The qualitative findings uncovered four design features for the 3-D textbook. A prototype was subsequently developed using the design features as a blueprint. The prototype serves as a testing ground for new ideas as well as a platform to promote awareness and acceptance of the 3-D textbook among the practitioners. Consequently, this article attempted a significant proposition to bring together architecture and EE, thus potentially contributing to a field of knowledge that embraces design and education.     

论大学生就业推进的“4-2-3-1”模式

现在大学生就业难度越来越大,有些大学生更是找工作的积极性不高,造成高校毕业生就业率低下,造成高校培养了人才,却不能把人才推向社会,为社会服务,造成了教育资源的浪费。因此,如何推进大学生就业成为了摆在高校教育工作者面前的一道难题。高校教育工作者不仅要对学生进行专业知识的灌输,更要对毕业生的就业进行指导。足球战术中的"4-2-3-1"模式颇具特点,对推进大学生就业可以起到重要作用。     

Determination of the centre of mass kinematics in alpine skiing using differential global navigation satellite systems

In the sport of alpine skiing, knowledge about the centre of mass (CoM) kinematics (i.e. position, velocity and acceleration) is essential to better understand both performance and injury. This study proposes a global navigation satellite system (GNSS)-based method to measure CoM kinematics without restriction of capture volume and with reasonable set-up and processing requirements. It combines the GNSS antenna position, terrain data and the accelerations acting on the skier in order to approximate the CoM location, velocity and acceleration. The validity of the method was assessed against a reference system (video-based 3D kinematics) over 12 turn cycles on a giant slalom skiing course. The mean (± s) position, velocity and acceleration differences between the CoM obtained from the GNSS and the reference system were 9 ± 12 cm, 0.08 ± 0.19 m · s^-1 and 0.22 ± 1.28 m · s^-2, respectively. The velocity and acceleration differences obtained were smaller than typical differences between the measures of several skiers on the same course observed in the literature, while the position differences were slightly larger than its discriminative meaningful change. The proposed method can therefore be interpreted to be technically valid and adequate for a variety of biomechanical research questions in the field of alpine skiing with certain limitations regarding position.     

Alternative 3D Modeling Approaches Based on Complex Multi-Source Geological Data Interpretation简

Due to the complex nature of multi-source geological data, it is difficult to rebuild every geological struc-ture through a single 3D modeling method. The multi-source data interpretation method put forward in this analysis is based on a database-driven pattern and focuses on the discrete and irregular features of geological data. The geological data from a variety of sources covering a range of accuracy, resolution, quantity and quality are classified and inte-grated according to their reliability and consistency for 3D modeling. The new interpolation-approximation fitting construction algorithm of geological surfaces with the non-uniform rational B-spline （NURBS） technique is then pre-sented. The NURBS technique can retain the balance among the requirements for accuracy, surface continuity and data storage of geological structures. Finally, four alternative 3D modeling approaches are demonstrated with reference to some examples, which are selected according to the data quantity and accuracy specification. The proposed approaches offer flexible modeling patterns for different practical engineering demands.     

三维建模与3D数字平台在高职行业英语中的应用

根据高职行业英语的教学特点,利用三维建模技术和3D数字平台技术来促进学生对专业知识和行业英语的掌握,可以在很大程度上提高学生的学习效率,促进课堂教学的效果。三维建模和数字平台的建设是一个系统的工程,涉及到很多的方面,如何建设和利用,是一个值得研究的课题。