第8—10届世界健美操锦标赛六人操队形变化分析

竞技健美操六人操比赛中,队形运用及其变化是比赛的重要内容之一．丰富多彩的队形及其巧妙流畅的变化使比赛更具艺术性和观赏性．采用文献资料法、录像统计法等研究方法,对2004年、2006年和2008年三届世界健美操锦标赛六人项目前6名的18套动作中队形运用和变化进行统计分析．结果表明,世界健美操集体项目六人操比赛中以规则队形运用为主,其中直线形、斜线形和三角形占前3位;队形变化朝着新颖、合理、快速、多变的方向发展,使表演效果和艺术观赏性更强．     

信号控制道路行程时间可靠度计算与实证

首先提出了一天不同时刻下的动态行程时间可靠度计算方法.然后以实际连续若干天的历史行程时间数据为基础,实证分析了信号控制干道行程时间分布、行程时间可靠度在一天中的分布变化情况.实证结果表明行程时间分布存在偏峰和时滞现象,否定了当前行程时间可靠度研究普遍认为的行程时间服从正态分布假设.最后分析了行程时间分布中的可靠系数、峰度统计参量与行程时间可靠度的变化关系.     

完善三峡外迁移民置换安置模式的思考——以江苏省大丰市为例

大丰市作为江苏省三峡外迁移民安置工作的试点地区,在采取置换安置模式安置移民方面取得了一定的成功,但同时,也应清醒地认识到置换安置模式容易受到旧房、土地、资金等资源的制约,需要地方政府从科学规划、主动协调、加强管理、积极开发投资性资源等方面继续完善这一新型模式,更好地服务三峡外迁移民。     

一种微小表面缺陷的机器视觉检测方法

针对表面缺陷在线自动检测应用的特点,提出一种快速检测微小表面缺陷的新方法. 文中分析了Otsu 法分割表面梯度图像中微小缺陷的性能,结合分析结果提出利用梯度图像方差分布搜寻表面缺陷区域的算法,在有表面缺陷的局部区域应用Otsu 法分割图像. 算法性能分析和实验结果表明,该方法可从背景变化不剧烈的表面图像中快速自动检测微小表面缺陷.     

江苏省13市旅游业国际竞争力研究

研究了旅游业国际化评价指标体系,据此建立了江苏省13市旅游业国际竞争力数据库,借助SPSS12．0软件,基于因子分析对13市做了旅游国际竞争力排名,通过聚类分析发现它们大致可分为3类5级．根据因子分析结果研究了13市的总体差异,发现各市旅游业普遍保持了较快的增速,旅游技术人才层次均偏低,在剩余众指标上个体差异明显,为此进一步选取苏宁、苏扬、镇淮3对典型城市做了具体差异探讨．     

Deterministic Teleportation Channel Using Bell State Measurements Only

Teleportation schemes based on probabilistic channels usually rely heavily on the implementation of high-dimensional unitary operations. Since high-dimensional unitary operations are very difficult to directly implement in physics experiments, methods are used to avoid high-dimensional unitary operations during the teleportation process. This paper describes how to construct a deterministic teleportation channel and a control channel using Bell state measurements only instead of high-dimensional unitary ope...     

Changes of Resistance During Polyelectrolyte-enhanced Stirred Batch Ultrafiltration

The permeation flux or the resistance in the ultrafiltration process is mainly limited by osmotic pressure,and it may originate from various kinds of polymer interactions. However, the real origin of permeation resistance hasn't been clarified yet in the light of polymer solution nature. The removal of nitrate contamination by polyelectrolytes was carried out with stirred batch ultrafiltration. The polyelectrolyte concentrations both in permeate and retentate were analyzed with total organic carbon analyzer and permeate mass was acquired by electronic balance connected with computer. The total resistance was calculated and interpreted based on the osmotic pressures in three concentration regimes. In the dilute region, the resistance was proportional to polymer concentration; in the semidilute region, the resistance depended on polymer concentration in the parabolic relationship; in the highly concentrated solution regime, the osmotic pressure factor (OPF) would dominate the total resistance; and the deviation from OPF control could come from the electrostatic repulsion between the tightly compacted and charged polyelectrolyte particles at extremely concentrated solution regime. It was first found that dilute and semidilute concentration regions can be easily detected by plotting the log-log curves of the polymer concentration versus the ratio of the total resistance to polymer concentration. The new concept OPF was defined and did work well at highly concentrated regime.     

在无间中无限——于生态视野中重读梁宗岱先生的《象征主义》

梁宗岱先生的《象征主义》是一篇谈论象征主义诗歌的文学理论文章,它指出象征的两个特性:一是融洽或无间,二是含蓄或无限,这也正是人在与自然的关系中所应有的呈现,有着人在宇宙间生存的大智慧。在今天的生态视野中,这篇写于1934年的文章有着特别的意义。     

体操运动中的跟腱损伤原因与防治措施

体操运动员严重的跟腱损伤会诱发跟腱断裂,从而危及其体操生涯。通过对体操运动中跟腱损伤的机制、诊断、治疗以及预防等多方面的阐述,认为在体操运动训练过程中必须首先增强运动员对于跟腱损伤的防范意识,并采取有效的保护措施,才能最大限度地避免与减少跟腱损伤的发生。     

Surface Modification of Anionic Polyurethane with Silk Fibroin Peptide and Its Effects on the Culture of Fibroblasts

The surface modification of the anionicpolyurethane(APU) film was carried out by immersing it insilk fibroin peptide(SFP) solution for 12 h and then treatingwith low temperature plasma glow discharge. The physicalproperties and moisture permeability of modified films wereexamined. The results showed that SFP-modified APU filmshad better moisture permeability than oleophilicpolyurethane, as well as modified APU films kept goodflexibility. Modified APU films could overcome rigid andbrittle weaks of silk fibroin films. The morphology of SFPon the APU film was corpuscular aggregations. The water-contact angle measurement indicated that the change ofhydrophilicity and the element chemical analysis suggestedthat the SFP-modified film surface was enriched withnitrogen atoms. The biocompatibility of APU films may beimproved due to the change of surface compooents. Cellviability and proliferation of rat embryo dermal fibroblastsseeded on control films, APU films and SFP-modified APUfilms were evaluated by MTT assay and viable cell counts,respectively. The results indicated that the APU filmmodified by SFP protein showed the proliferation offibroblasts on the film, and that the compound interface hadgood stability in the air. Results also showed thatpresoaking treatment for APU films was effective toaccomplish the goal of surface modification.