卫星通信在重大灾情中的应用及前景分析

在经历过2008年汶川地震及2010年玉树地震等公共重大灾害后,全社会正在面临该如何快速处理公共重大突发性事件的课题。保证第一时间灾害信息及救助信息的畅通是实现高效应急救助的重要保障。卫星通信在此时成为了唯一的通信手段,国家相关部门和电信运营商紧急调用各种卫星通信设备,切实保障了灾区的通信网络畅通,为灾区开展救援工作起着重要的促进作用。文章重点分析卫星通信在重大灾情中的应用,并对其未来发展前景展开论述。“     

小型招生呼叫中心的设计

计算机电话集成(CTI)技术是当前计算机技术与通信技术相结合的产物。本文以某高校的招生呼叫中心系统建设为基础,将基于CTI技术的呼叫中心系统引入高校招生工作,利用通信网和计算机网的多项功能集成,建立综合信息服务系统,以有效地为学生提供高质量、高效率、全方位的服务。     

警用 GPS 调度指挥系统框架设计

本文利用 GPS 技术、GSM 无线通信技术、GIS 技术等设计警用车辆进行指挥调度系统。警用车辆通过车载 GPS 系统计算自身的位置,利用 GSM 和 GPRS 无线网络向控制中心传输位置信息,控制中心对接收到的数据进行处理,然后在系统的 GIS 系统实时显示当前车辆位置信息,指挥中心根据需要进行调。     

数字式平面无线调车系统

文章介绍了一种新型的数字平面无线调车系统(radio marshalling of railway plane system),基于无线数字电台加装控制软、硬件,实时传送车辆编组调车信息,实现灯显信令、语音提示,是通信与信号一体化的车辆编组调度的信息与控制系统。该系统达到了《铁路平面无线调车设备技术条件》(TB/T 2834-2002)的技术要求,满足了调车作业的需求,极大的解决了设备上常出现的问题,提高了工作效率和安全质量。     

智能药盒的设计

针对日常老年人按时服药困难的问题,文章设计了一款智能药盒。可以自主设定用药时间及次数,同时扩展了紧急求救功能。当到达设定的用药时间时,蜂鸣器提醒使用者服药,并通过红外检测模块判断使用者是否取药,如果半小时之内没有检测到使用者取药,则蜂鸣器报警提醒使用者尽快服药。当使用者出现意外情况时,可以触发一键式报警按钮,本系统通过GSM模块将信息发送给预设接受对象,达到紧急求救的效果。     

独辟蹊径做短信 移动数码新防伪──记金鸿联移动数码防伪系统

随着我国移动通讯事业的不断发展，移动通讯已经越来越与人们日常工作和生活密不可分。移动GSM网络的不断建设和改造及移动通讯在信息领域所产生的推动力，在很大程度上加速了整个国民经济的发展。随着移动推出“移动梦网计划”以来，国内各家SP纷纷推出短信息服务。短信服务因其方便、快捷且收费合理，受到手机用户的青睐和宠爱，人们把短信息进行信息交流和传递作为一种时尚的生活、工作方式，短信息也很快便在全球范围内形成一股热潮。鸿联九五信息产业股份有限公司作为我国一家主要的虚拟电信运营商，利用自身从事电信增值服务的丰富…     

组通信技术研究

简述组通信技术的含义及模型,讨论了组通信技术的信息定序、信息交付保证及组维持等三个属性,针对信息定序的定序服务特点进一步提出原子广播技术,并研究了它的两种典型实现原理.为解决信息被交付之前出现的延迟问题,又利用IP组播技术提出了一种乐观的原子广播技术.     

基于GPS定位、GSM短消息运输监控系统的设计与实现

依据GPS的定位功能和GSM的短消息(SMS)功能,开发了远程无线物流监控系统.介绍了GSM网络的SMS的收发过程和提取GPS定位信息的方法.该远程无线物流监控系统通过解析卫星定位数据,经解码获取当前经纬度信息,然后经GSM模块向其他手机或查询终端发送SMS,实现运输系统的实时位置监控.同时还可以通过ARM7嵌入式处理器和各种监控探头与传感器,监控车辆运行状态、安全状态和货物状况.     

基于SIP协议的融合通信技术

随着4G时代的移动互联网的发展,网络技术的更新,在移动互联网的背景下,过去的单一通信方式不再能满足目前的需求。通过融合、统一的通信模式实现有效工作协同的诉求已经越来越强烈。融合通信,在过去的单一融合的通信方式是最先进的计算机技术,计算机网络与传统通信网络,电话,传真,数据传输,音视频会议,呼叫中心,即时通信等,已集成到一个网络平台,实现多种应用服务。对于融合通信项目,即时消息服务是最常用的服务,SIP协议是支持融合通信项目的主要协议。     

基于CANoe.car2x和Aurix的车联网仿真及其实现

本文主要针对车辆无线通信网络问题(车联网通信),首先介绍了Vector公司CANoe软件的新功能选项—CANoe.Car2x,基于此实现了多节点之间的通信仿真,收到了预期的效果,为车联网的进一步研究打下了基础。除此之外,文章还介绍了车联网通信所采用的一种新型的方法,即利用英飞凌的Aurix单片机上的以太网模块,并实现了GPS信息的发送。     

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.     

Textural Properties of Cold-set Gels Induced from Heat-denatured Whey Protein Isolates

A 9% whey protein (WP) isolate solution at pH 7.0 was heat-denatured at 80°C for 30 min. Size-exclusion HPLC showed that native WP formed soluble aggregates after heat-treatment. Additions of CaCl2 (10–40 mM), NaCl (50–400 mM) or glucono-delta-lactone (GDL, 0.4–2.0%, w/v) or hydrolysis by a protease from Bacillus licheniformis caused gelation of the denatured solution at 45°C. Textural parameters, hardness, adhesiveness, and cohesiveness of the gels so formed changed markedly with concentration of added salts or pH by added GDL. Maximum gel hardness occurred at 200 mM NaCl or pH 4.7. Increasing CaCl2 concentration continuously increased gel hardness. Generally, GDL-induced gels were harder than salt-induced gels, and much harder than the protease-induced gel.     

Occurrence of bisphenol-F-diglycidyl ether (BFDGE) in fish canned in oil

The levels of bisphenol-F-diglycidyl ether (BFDGE) were quantified as part of a European survey on the migration of residues of epoxy resins into oil from canned fish. The contents of BFDGE in cans, lids and fish collected from all 15 Member States of the European Union and Switzerland were analysed in 382 samples. Cans and lids were separately extracted with acetonitrile. The extraction from fish was carried out with hexane followed by re-extraction with acetonitrile. The analysis was performed by reverse phase HPL C with fluorescence detection. BFDGE could be detected in 12% of the fish, 24% of the cans and 18% of the lids. Only 3% of the fish contained BFDGE in concentrations considerably above 1mg/kg. In addition to the presented data, a comparison was made with the levels of BADGE (bisphenol-A-diglycidyl ether)analysed in the same products in the context of a previous study.     

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.     

Contribution of European research to risk analysis

The European Commission's, Quality of Life Research Programme, Key Action 1—Health, Food & Nutrition is mission-oriented and aims, amongst other things, at providing a healthy, safe and high-quality food supply leading to reinforced consumer confidence in the safety of European food. Its objectives also include the enhancing of the competitiveness of the European food supply. Key Action 1 is currently supporting a number of different types of European collaborative projects in the area of risk analysis. The objectives of these projects range from the development and validation of prevention strategies including the reduction of consumers risks; development and validation of new modelling approaches; harmonization of risk assessment principles, methodologies, and terminology; standardization of methods and systems used for the safety evaluation of transgenic food; providing of tools for the evaluation of human viral contamination of shellfish and quality control; new methodologies for assessing the potential of unintended effects of genetically modified (genetically modified) foods; development of a risk assessment model for Cryptosporidium parvum related to the food and water industries; to the development of a communication platform for genetically modified organism, producers, retailers, regulatory authorities and consumer groups to improve safety assessment procedures, risk management strategies and risk communication; development and validation of new methods for safety testing of transgenic food; evaluation of the safety and efficacy of iron supplementation in pregnant women; evaluation of the potential cancer-preventing activity of pro- and pre-biotic ('synbiotic') combinations in human volunteers. An overview of these projects is presented here.