PVC DISULFIDE AS CATHODE MATERIALS FOR SECONDARY LITHIUM BATTERIES

PVC disulfide (2SPVC) was synthesized by solution crosslink and its molecular structure was confirmed by infrared spectrum. 2SPVC's specific area is 36.1 m2·g-1 tested by stand BET method, and granularity experiment gives out the particle size of d0.5= 11.3μm. With SEM (Scanning Electron Microscope) experiment the surface morphology and particle shape of 2SPVC were observed. Cyclic voltammetry (scan rate: 0.5 mV·s-1) shows that 2SPVC experience an obvious S-S redox reaction in charge-discharge process. When 2SPVC was used as cathode material for secondary lithium battery in a 1 mol·L-1 solution of lithium bis(trifluoromethylsulfonyl) imide (Li(CF3SO2)2N) in a 5:45:50 volume ratio mixture of o-xylene (oxy), diglyme (DG) and dimethoxymethane (DME) at 30℃, the first discharge capacity of 2SPVC is about 400.3 mAh·g-1 which is very close to its theoretical value (410.5 mAh·g-1) at a constant discharge current of 15 mA·g-1. It can retain at about 346.1 mAh·g-1 of discharge capacity after 30 charge-discharge cycles. So 2SPVC is a very promising cathode candidate for rechargeable lithium batteries.     

Application of nanodiamonds in human body fluid analysis by matrix-assisted laser desorption/ionization mass spectrometry

Direct mass spectrometric analysis of complex biological samples is very important and challenging. In this paper, nanodiamonds have been successfully used in matrix-assisted laser desorption/ionization mass spectrometric analysis of human serum and urine. As a practical tool and platform, it can be widely used in the field of humoral proteomics, and it plays a very promising role in clinical diagnosis, including identification of novel disease-associated biomarkers.     

Using components of mathematical ability for initial development and identification of mathematically promising students

Kruteskii's work on the mathematical abilities of school children is a seminal work on the nature of mathematical ability. However, the task of developing methods for the practical application of his work is still a significant problem in mathematics education. The authors have developed a practical application of Kruteskii's approach to the important problem of initially developing components of mathematical ability in student and thereafter identifying mathematically promising students. Examples of problems that were designed to develop ability to generalize, flexibility and reversibility of mental processes are presented. A practical guide for determining the level of development of components of mathematical abilities in individual students, in terms of specified observables, is presented as a set of structured reference tables. The authors set out a practical application protocol that combines use of the tables and sets of specially developed problems for initial development of mathematical abilities prior to identification of mathematically promising students in the general classroom. A significant motivation for this work is the desire to avoid time-consuming and resource intensive practices such as interviews and summer schools which therefore have been used successfully because these practices are now out of reach for all but very wealthy countries or highly ideologically driven systems. On the other hand, special examinations heavily depend on the level of preparedness of the students for the particular examination, and therefore some students with high abilities but with fewer opportunities to prepare could be overlooked.     

Biomass Inspired Nitrogen Doped Porous Carbon Anode with High Performance for Lithium Ion Batteries

Ginkgo leave, a naturally abundant resource, has been successfully employed as the raw material to prepare nitrogen doped porous carbon (NDPC) materials. The preparation of the porous carbon does not involve assistance of any activation or template technique. The as‐obtained NDPC shows favorable features for electrochemical energy storage, which can not only provide multiple sites for the storage and insertion of Li ions, but also facilitate rapid mass transport of electrons and Li ions. As a result, the NDPC when evaluated as an anode material for lithium ion batteries delivers high reversible capacity (505 mAh·g^?1 at 0.1 C), excellent rate capability (190 mAh·g^?1 at 10 C). These favorable properties suggest that the NDPC can be a promising anode material for lithium ion batteries (LIBs).     

诱导式教学法在高校太极拳教改中的运用

太极拳教学是高等院校大学体育课程教学的特色内容，但由于其枯燥的表演式的套路学习，加之缓慢平稳的运动节奏，很难激起现代学生的学习热情和积极性，在大力倡导教学改革创新的今天，如何使广大学生能更好更准确地掌握太极拳运动的基本锻炼方法，使其为学生所喜闻乐见；教师应进行有益的教改尝试，教师可合理地运用诱导、启发，充分调动学生学习、锻炼的兴趣，采用诱导式教学法，探索出一套太极拳教学的新方法，取得较好的教学效果。     

准政府组织在中国的发展历程以及前景展望

20世纪后期以来,世界各国政府均陆续开始了治道变革的进程。处于转型时期的中国的政府机构改革也正视协调政府与社会的关系,而准政府组织恰恰是一个媒介。文章论述了准政府组织在中国的发展历程及现状,并对准政府组织的发展做出了预测。     

Polarization properties of porous anodic alumina with Y-branched Cu nanowires

Porous anodic alumina (PAA) templates with branch structure are fabricated by the two-step anodic oxidation processes, and then the Y-branched Cu nanowires are synthesized in the templates using an alternating current (AC) deposition method. We observe the morphology image of the samples by scanning electron microscopy (SEM), and measure the transmission spectrum and the polarization spectrum of the samples by the spectrophotometer. The results show that PAA films with Y-branched Cu nanowires have better transmittance in the near infrared region. An extinction ratio of 15-18 dB and an insertion loss of 0.1-0.4 dB are obtained in this region. Therefore PAA with Y-branched Cu nanowires can be used as a near-infrared micropolarizer, and this kind of micropolarizer would have a promising future in the field of photoelectricity integration.     

中国优秀文化传统与中国特色外交理论构建

中国优秀文化传统,是中华民族赖以生存延续的基础和动力,是中国人五千年传承至今的最主要的心理习惯、思维定势,对中国特色外交思想、外交战略和外交行为产生了深刻影响,是构建中国特色外交理论的文化源泉。＂天人合一＂的独特宇宙观决定了中国人重整体思维的基本特点。＂刚健有为＂、＂自强不息＂的优秀文化传统,决定了中国始终坚持独立自主的和平外交政策。＂和合＂文化在中国外交中表现为对当今世界两大主题＂和平与发展＂的积极倡导与践行。     

地方政府职能模式变迁的温州探索

为了推进经济社会的转型发展，温州顺势而为，积极推动政府职能模式变迁，通过规范政府的权力运行以及提高公共服务水平打造“有为政府”，并取得了一定的成效。温州以有为政府建设为目标取向的政府职能模式变迁具有一定的启示意义。     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.