基于Three.js的虚拟漫游服装店的构建

为丰富用户线上购物的虚拟交互体验,基于Three.js等技术在Web端构建可以漫游的虚拟服装店。使用Style3D对服装进行数字化建模,通过Blender进行陈列展示数字化并导出服装店模型;在Web端构建Three.js三维场景,加载服装店三维模型并在Web端实现可视化显示;采用碰撞检测的方法避免出现场景中模型穿透的问题,实现人物在场景中的漫游和交互。通过虚拟漫游服装店的开发,丰富电商营销的方式,使用户可以方便地在网页中进行虚拟漫游逛店体验。     

面向服装行业的人体三维重构建模研究现状

近年来面向服装行业的人体三维重构研究为新兴的服装虚拟展示、网络虚拟试衣和服装个性化定制等提供了技术支撑.人体三维重构建模方法的研究是建立服装虚拟人体模型的关键因素,基于三维扫描技术、特定软件、曲面建模和视觉图像等方法的人体三维重构建模进行对比、分析及总结后,从当前人体三维重构建模存在的问题出发,提出了基于二维图像的数据提取与参数化曲面建模的人体重构相耦合的思路,可得到更具有交互性、实时性及准确性的三维人体模型,新的人体三维重构建模思路为面向服装行业的人体三维重构提供了理论参考,且在未来服装行业的应用更具有实用性.     

基于Virtools的橱柜虚拟展示系统

根据当前网络平台上厨房橱柜家具展示方式不足的现状,提出一种以3ds Max建模软件与Virtools虚拟交互平台相结合的方式制作可交互操控的的产品立体展示系统。首先分析了网络虚拟展示使用用户群的群体特点,并对其分成三类,选用针对这三类人群的3种具有针对性的橱柜设计方案进行橱柜虚拟展示系统的构建。通过对消费群的分析确定展示内容,构建虚拟展示系统逻辑框架;利用3ds Max建模软件对橱柜产品进行虚拟建模并附加材质,然后再导入Virtools虚拟交互制作软件中进行交互系统编辑并最终导出可用于网络共享的虚拟展示系统。文中重点解析制作过程中的关键技术以体现其动态交互的重要特色,最终构建区别于传统二维静态展示模式的三维虚拟展示系统。     

基于VR技术的虚拟作业的实现

基于VR技术的虚拟作业实现为作业指导提供了一种崭新的思路和方法。对虚拟作业环境实现的关键性技术进行了研究,包括三维模型的构建、虚拟环境的实现、交互控制等方面的内容。以机械手的作业为例,利用CAD三维软件和3DsMAX,结合VRML技术,构建了机械手三维模型、作业环境的静态虚拟模型,再利用VRP编辑器,实现用户可以实时交互控制的动态机械手作业仿真。     

三维数字校园建模

利用学校基础的空间地理数据,结合SketchUp软件的三维建模功能和GIS技术的三维空间分析功能,开发了一种针对校园三维模型构建的方法。三维数字校园模型实现了学校的空间信息资源的输入、显示、查询、定位、场景漫游、量算和分析、定位感兴趣点等功能。     

虚拟三维服装展示技术的现状与发展趋势

虚拟三维服装展示技术经历了简单服装变形形态的静态模拟到三维复杂服装动态模拟的过程。从建模技术、动态模拟、褶皱处理、虚拟展示构造方法等方面,提出系统的设计方案,归纳整理出适合三维服装虚拟展示的主要技术方案,系统地介绍虚拟三维服装展示技术的研究现状,详细地分析虚拟三维服装展示技术面临的挑战和未来研究趋势。     

三维可视化图书馆导览的实现方法研究

本文对3DGIS进行了研究,提出了使用3DMax软件进行建模和ArcScene软件进行三维场景的制作,并生成图书馆动画的方法,实现了三维可视化图书馆的真实导览效果,生动、形象、立体地展示了图书馆,同时也为3D数字校园的建设提供了可借鉴的方法。     

浅析3DMAX制作中建模技巧

3DMAX具有多种建模手段，对于目前流行的虚拟产品的开发，是至关重要的，可以大大的提高虚拟场景在构建时的开发效率，属于关键技术之一。文章阐述在教学中三维模型创建中常见的几种建模方法，以及这些建模方法的优缺点和运用技巧，以帮助学生对建模有一个完整和深入的了解，并能在实际学习和工作中得到应用。     

衬衣面料三维虚拟展示系统的开发

三维虚拟展示技术能够较好地模拟织物穿着后所表现的外观及悬垂性、光泽、褶皱等物理性能,更好地服务于个性化私人订制.现有的纺织面料虚拟展示系统侧重于二维平面的展示,缺乏对面料最终效果进行立体三维全方位的虚拟展示.使用3DMAX和OpenGL图形库以及一些辅助工具,通过设计系统功能和操作界面、搭建应用场景、三维人体服装建模、...     

基于Pro／E生物质粉碎机虚拟设计与研究

文章基于国内生产的饲料粉碎机的原型,构思了生物质粉碎机的模型,在三维CAD设计软件Pro／E环境下进行三维实体建模。对生物质粉碎机的虚拟样机的设计与研究进行了有创新和建设性的尝试,为利用虚拟样机技术研究农业机械提供了更多有益的参考。     

Reliable identification of grapevine rootstock varieties using RAPD PCR on woody samples

Since grapevine ( Vitis spp .) rootstock material is being traded increasingly as disbudded woody material a lack of distinctive morphological features on such material necessitates an alternative and reliable means of identification. Methods described here were developed for rapid and efficient extraction of DNA from woody samples rich in phenolic compounds and polysaccharides, and for subsequent identification of varieties by RAPD PCR. Using these methods, and with the application of only one selected RAPD primer, we were able to differentiate sixteen rootstock varieties, including the seven varieties most commonly used in Germany. Problems commonly encountered with reproducibility of RAPD patterns were avoided by choosing primers with a dinucleotide sequence and a high G/C content that allowed a rather high annealing temperature of 45°C. Methods described here should also be useful for other horticultural crops, especially those with woody tissues rich in phenolic compounds and polysaccharides.     

An internet compendium of analytical methods and spectroscopic information for monomers and additives used in food packaging plastics

An internet website (http://cpf.jrc.it/smt/) has been produced as a means of dissemination of methods of analysis and supporting spectroscopic information on monomers and additives used for food contact materials (principally packaging). The site which is aimed primarily at assisting food control laboratories in the European Union contains analytical information on monomers, starting substances and additives used in the manufacture of plastics materials. A searchable index is provided giving PM and CAS numbers for each of 255 substances. For each substance a data sheet gives regulatory information, chemical structures, physico-chemical information and background information on the use of the substance in particular plastics, and the food packaging applications. For monomers and starting substances (155 compounds) the infra-red and mass spectra are provided, and for additives (100 compounds); additionally proton NMR are available for about 50% of the entries. Where analytical methods have been developed for determining these substances as residual amounts in plastics or as trace amounts in food simulants these methods are also on the website. All information is provided in portable document file (PDF) format which means that high quality copies can be readily printed, using freely available Adobe Acrobat Reader software. The website will in future be maintained and up-dated by the European Commission's Joint Research Centre (JRC) as new substances are authorized for use by the European Commission (DG-ENTR formerly DGIII). Where analytical laboratories (food control or other) require reference substances these can be obtained free-ofcharge from a reference collection housed at the JRC and maintained in conjunction with this website compendium.     

Aroma characterization of various apricot varieties using headspace–solid phase microextraction combined with gas chromatography–mass spectrometry and gas chromatography–olfactometry

The characterization of the aromatic profile of several apricot cultivars with molecular tracers in order to obtain objective data concerning the aromatic quality of this fruit was undertaken using headspace–solid phase microextraction (HS–SPME). Six apricot cultivars were selected according to their organoleptic characteristics: Iranien, Orangered, Goldrich, Hargrand, Rouge du Roussillon and A4025. The aromatic intensity of these varieties measured by HS–SPME–Olfactometry were defined and classified according to the presence and the intensity of grassy, fruity and apricot like notes. In the six varieties, 23 common volatile compounds were identified by HS–SPME–GC–MS. Finally, 10 compounds, ethyl acetate, hexyl acetate, limonene, β-cyclocitral, γ-decalactone, 6-methyl-5-hepten-2-one, linalool, β-ionone, menthone and (E)-hexen-2-al were recognized by HS–SPME–GC–O as responsible of the aromatic notes involved in apricot aroma and considered as molecular tracers of apricot aromatic quality which could be utilized to discriminate apricot varieties.     

Tests of potential functional barriers for laminated multilayer food packages. Part I: Low molecular weight permeants

The advent of the functional barrier concept in food packaging has brought with it a requirement for fast tests of permeation through potential barrier materials. In such tests it would be convenient for both foodstuffs and materials below the functional barrier (sub-barrier materials) to be represented by standard simulants. By means of inverse gas chromatography, liquid paraffin spiked with appropriate permeants was considered as a potential simulant of sub-barrier materials based on polypropylene (PP) or similar polyolefins. Experiments were performed to characterize the kinetics of the permeation of low molecular weight model permeants (octene, toluene and isopropanol) from liquid paraffin, through a surrogate potential functional barrier (25 μm-thick oriented PP) into the food simulants olive oil and 3% (w/v) acetic acid. These permeation results were interpreted in terms of three permeation kinetic models regarding the solubility of a particular model permeant in the post-barrier medium (i.e. the food simulant). The results obtained justify the development and evaluation of liquid sub-barrier simulants that would allow flexible yet rigorous testing of new laminated multilayer packaging materials.     

Analysis of benzo[a]pyrene in spiked fatty foods by second derivative synchronous spectrofluorimetry after microwave-assisted treatment of samples

A simple, rapid and inexpensive method has been developed for the determination of benzo[a     

The development of reference materials for paralytic shellfish poisoning toxins in lyophilized mussel. II: Certification study

This paper describes the second part of a project undertaken to develop certified mussel reference materials for paralytic shellfish poisoning toxins. In the first part two interlaboratory studies were undertaken to investigate the performance of the analytical methodology for several PSP toxins, in particular saxitoxin and decarbamoyl-saxitoxin in lyophilized mussels, and to set criteria for the acceptance of results to be applied during the certification exercise. Fifteen laboratories participated in this certification study and were asked to measure saxitoxin and decarbamoyl-saxitoxin in rehydrated lyophilized mussel material and in a saxitoxin-enriched mussel material. The participants were allowed to use a method of their choice but with an extraction procedure to be strictly followed. The study included extra experiments to verify the detection limits for both saxitoxin and decarbamoyl-saxitoxin. Most participants (13 of 15) were able to meet all the criteria set for the certification study. Results for saxitoxin.2HCl yielded a certified mass fraction of <0.07 mg/kg in the rehydrated lyophilized mussels. Results obtained for decarbamoyl-saxitoxin.2HCl yielded a certified mass fraction of 1.59+/-0.20 mg/kg. The results for saxitoxin.2HCl in enriched blank mussel yielded a certified mass fraction of 0.48 +/- 0.06 mg/kg. These certified reference materials for paralytic shellfish poisoning toxins in lyophilized mussel material are the first available for laboratories to test their method for accuracy and performance.     

Announcing a new international peer-reviewed journal:Food Science and Human Wellness now accepting manuscript submission in English

<正>We are pleased to announce the launch of a new international peer-reviewed journal-Food Science and Human Wellness,ISSN 2213-4530,which is an open access journal,produced and hosted by Elsevier B.V.on behalf of Beijing Academy of Food Sciences.Food Science and Human Wellness is an international peer-reviewed English journal that provides a forum for the dissemination of the     

Chinese CTP Market

According to Printing and Printing Equipment Industries Association of China（PEIAC）＇s statistics to the plate manufucturer in China, in 2013, the actual offset plate production has reached 346 million square meters in China. Among them, the CTP production volume was 245 million square meters, up by 11% than that of last year; the total sales of the CTP plate was 239 million square meters, up by 13%.     

Preparatory Work of Print China 2015 is Going Smoothly

正Held at Guangdong Modern International Exhibition Center,Print China 2015 will cover 7exhibition halls,besides the original Hall No.3,4,5,6,7,the newly built F zone of Hall 3 will be used too.The total area will be140,000 square meters.Hall 3:Offset and large printing equipment,package printing equipment,post press