3D Field-Scale Environmental Multimedia System Validation of the Dispersion of Benzene for Trail Road Landfill Site and Its Risk Assessment

In this paper, a new modeling approach incorporating both a new environmental multimedia system (EMS) and the Monte Carlo method (MCM) is developed as a tool for the risk assessment of contaminants. An EMS has been developed and validated by the use of field data and investigation to create a 3D simulation of current conditions of the Trail Road Landfill area. In addition, given the high level of uncertainty associated with EMS practices, the MCM approach is embedded into the developed EMS to deal with vague or imprecise model and site conditions related to uncertainties in the system. In this study, two emission rates were examined for risk assessment of Trail Road Landfill site in the years 2016 and 2026;the data are predicted on the basis of the known production trend from 2001 to 2006. The risk quotient (RQ) factors, combined with present and future rates of chemical pollution, provide spatial and temporal assessment of risk from the leachate in Trail Road Landfill site. Results of the risk assessment approach reveal that as the landfill or oil drilling site becomes depleted, adverse effects on the multimedia environment associated with benzene concentration occur, and the potential risk levels have been quantified for the Trail Road Landfill site. The present study indicates that the dispersion of a large volume of pollutants from the landfill or the oil drilling site poses possible risks to the regional multimedia environment. The new EMS will serve as a risk assessment tool to address the fate and transportation of pollutants in complex multimedia environments. This tool will also be useful in the management of the resulting environmental impacts.

Research on the Interactive Interpreting Teaching Mode under the Multimedia and Traditional Microteaching Environment

In this paper, we conduct research on the interactive interpreting teaching mode under the multimedia and primary traditional microteaching environment. English interpretation course system construction request from the student reality, on the basis of the actual situation, improving students＇ comprehensive ability in English interpretation as communicative teaching method in the very great degree to overall effective guide students to practice real interpreting scene comprehensively improve students＇ intercultural business negotiation, reception and comprehensive ability of the exhibition, and is advantageous to the interpretation of curriculum system construction and the improvement of the students＇ comprehensive quality. Our research integrates the general principles of the multimedia and primary traditional microteaching environment to form the better paradigm for the education that will enhance the contemporary teaching condition.

Based on Multimedia and Network Social Environment--A study of Pragmatic Acquisition in College English Teaching

With the progress of the times,the number of college students is growing exponentially.But the students who enter the university are various and have their own advantages and disadvantages.Among them,the polarization of students'English level is particularly obvious and serious.Therefore,in view of the contradiction between"not enough to learn"and"unable to learn",this paper makes a preliminary exploration on the pragmatic acquisition mode of College English teaching based on multimedia and network social environment.This paper mainly discusses and analyzes the concept of pragmatic acquisition mode and about how to implement it in practical teaching.In addition,this paper is only for reference in the English teaching industry.

Analysis of the thinking method of English teaching under network environment

How to make a good job of foreign language teaching and improve the quality of teaching is a topic which the general teaching workers are facing, in this paper, the author express ideas from many aspects, multi-angle, multi-level, this brings a valuable theory reference on methods of English teaching which is under network environment. As for the problems of how to solve the bottle neck of English teaching, how to train the talent who are more adaptive to the world economy globalization, how to get rid of the traditional teaching method in teaching and how to improve the teaching level more efficiently, this paper gave some good methods and suggestions.

Effective Learner-Lecturer Interaction Working With a Virtual Learning Environment

Using the Internet to learn a language creates wide opportunities to enhance learning （Association of teachers of English in Catalonia （APAC）, 2010）. The Internet activities promote learners＇ self-monitoring ability, encourage the use of multimedia and network technology, and develop students＇ cooperation and participation. During the latest years, there have been many changes in education as these new technologies, including VLEs （Virtual Learning Environments）, which have become an important part in the teaching/learning process. According to Tech Terms Computer Dictionary （2012）, VLE is a virtual classroom where teachers and students communicate. VLEs have evolved as at an early stage, they were only ways of transmitting information： Teachers uploaded the multimedia resources and students read this information. At a higher stage, VLEs have become interactive. This means that students become active. We have designed a virtual environment where students, weekly, must contribute their opinions and comments in response to a required activity uploaded by the teacher. In this paper, we describe this weekly task and analyze students＇ opinion about this planned activity. The students become an active subject in this field. In this paper, we show how VLEs are no longer a means of transmitting information but a means of interaction as well as a way of motivating our students to be involved in their learning process

Metaheuristic Clustering Protocol for Healthcare DataCollection in MobileWireless Multimedia Sensor Networks

Nowadays,healthcare applications necessitate maximum volume of medical data to be fed to help the physicians,academicians,pathologists,doctors and other healthcare professionals.Advancements in the domain of Wireless Sensor Networks(WSN)andMultimediaWireless Sensor Networks(MWSN)are tremendous.M-WMSN is an advanced form of conventional Wireless Sensor Networks(WSN)to networks that use multimedia devices.When compared with traditional WSN,the quantity of data transmission in M-WMSN is significantly high due to the presence of multimedia content.Hence,clustering techniques are deployed to achieve low amount of energy utilization.The current research work aims at introducing a new Density Based Clustering(DBC)technique to achieve energy efficiency inWMSN.The DBC technique is mainly employed for data collection in healthcare environment which primarily depends on three input parameters namely remaining energy level,distance,and node centrality.In addition,two static data collector points called Super Cluster Head(SCH)are placed,which collects the data from normal CHs and forwards it to the Base Station(BS)directly.SCH supports multi-hop data transmission that assists in effectively balancing the available energy.Adetailed simulation analysiswas conducted to showcase the superior performance of DBC technique and the results were examined under diverse aspects.The simulation outcomes concluded that the proposed DBC technique improved the network lifetime to a maximum of 16,500 rounds,which is significantly higher compared to existing methods.

Research on College English Teaching Model Based on Multimedia and Network

Based on multimedia and network environment, college English teaching mode can effectively improve the teaching environment of traditional English teaching and students, and expand the capacity of English classroom information, and enrich the students’ English culture background. Therefore, as a teacher, we should first of all make efforts to learn new knowledge and teaching methods to improve our English professional quality. Strengthening the multimedia, network technology and educational psychology research, and put themselves in the teaching position. In addition, the college English teaching model based on multimedia and network environment can cultivate students’ independent thinking, autonomous learning, analysis and problem - solving ability, and promote the high efficiency of college English teaching.

A Distributed LRTCO Algorithm in Large-Scale DVE Multimedia Systems

In the large-scale Distributed Virtual Environment(DVE)multimedia systems,one of key challenges is to distributedly preserve causal order delivery of messages in real time.Most of the existing causal order control approaches with real-time constraints use vector time as causal control information which is closely coupled with system scales.As the scale expands,each message is attached a large amount of control information that introduces too much network transmission overhead to maintain the real-time causal order delivery.In this article,a novel Lightweight Real-Time Causal Order(LRTCO)algorithm is proposed for large-scale DVE multimedia systems.LRTCO predicts and compares the network transmission times of messages so as to select the proper causal control information of which the amount is dynamically adapted to the network latency variations and unconcerned with system scales.The control information in LRTCO is effective to preserve causal order delivery of messages and lightweight to maintain the real-time property of DVE systems.Experimental results demonstrate that LRTCO costs low transmission overhead and communication bandwidth,reduces causal order violations efficiently,and improves the scalability of DVE systems.

INTEGRATING COLLEGE ENGLISH COURSE AND COMPUTER MULTIMEDIA:CONSTRUCTING THE NEW AND IDEAL INTERACTIVE LEARNING ENVIRONMENT

With the social and economic development of our country, education at college level is changing rapidly.The popularity of modern information technology education is a hot subject. In recent years, the infusion ofmultimedia into teaching and learning has altered considerably the instructional strategy in our educationalinstitutions and changed the way teachers teach and students learn. The traditional teacher-centric method ofteaching used for decades in our educational system has been modified and enhanced. Currently, moderneducation theory is moving from the traditional recall of facts, principles, or correct procedures into the areasof creative thinking, problem solving, analysis and evaluation. These are skills which are very much needed intoday's knowledge based economy. This shift in focus on learning has presented our educators with seriouschallenges as well as opportunities in restructuring their curriculum to meet the rising demands of theknowledge based society, which is currently being initiated by the Ministry of Education of China.In this paper, we focus on designing a course which is oriented towards a constructivist based paradigm byusing multimedia as an instructional tool, and where students are active learners, involved in constructing theirown knowledge in the learning process and determining how to reach their own learning outcomes. A surveywas carried out to ascertain the reactions of students enrolled in an interactive multimedia course in WenzhouUniversity, Zhejiang province towards this constructivist based learning mode. The results indicated that thesestudents reacted positively towards this study mode and improved their interpersonal and collaborative learningskills.

Optimisation design and verification of the acoustic environment for multimedia classrooms in universities based on simulation

The acoustic environment of the classroom is one of the most important factors influencing the teaching and learning effects of the teacher and students.It is critical to ensure good speech intelligibility in classrooms.However,due to some factors,it may not be easy to achieve an ideal classroom acoustic environment,especially in large-scale multimedia classrooms.In a real renovation project of 39 multimedia classrooms in a university,seven typical rooms were selected,and the acoustic environment optimisation design and verification for these multimedia classrooms were performed based on simulation.First,the acoustic and sound reinforcement design schemes were determined based on the room acoustics software ODEON.Next,the effects of the optimisation design were analysed,and the simulated and measured results were compared;the accuracy of using the reduced sound absorption coefficients,which were determined empirically,was also examined.Finally,the recommended reverberation times(RTs)in multimedia classrooms corresponding to speech intelligibility were discussed,the effectiveness of the speech transmission index(STI)as a primary parameter for classroom acoustic environment control was considered,and the acoustic environment under the unoccupied and occupied statuses was compared.The results revealed that although there are many factors influencing the effect of classroom acoustic environment control,an adequate result can be expected on applying the appropriate method.Considering both the acoustic design and visual requirements also makes the classroom likely to have a good visual effect in addition to having a good listening environment.

土壤多介质环境污染研究进展

综述了土壤多介质环境污染问题的研究现状，包括吸附、解吸、淋溶、挥发、降解等过程及多介质环境数学模型的研究进展，并对目前研究中存在的不足及今后需加强的研究领域提出了建议。

汞在兰州市多介质环境中的分布特征及成因初探

为探讨汞在兰州市多介质环境中的分布特征及成因,用金砂吸附及AMA254高级测汞仪测定了兰州市不同功能区大气、土壤和水体三介质中的总汞含量。结果表明,兰州市大气总汞浓度年平均值为28.62ng·m-3,其中采暖期为48.48ng·m-3,非采暖期为9.42ng·m-3;兰州市土壤剖面汞含量的差异较大,表层汞含量高,最高峰值0.117mg·kg-1,向下逐渐减少到土壤背景值;兰州市黄河水体中总汞浓度夏季高于冬季,夏季水体中汞以溶解态为主,冬季以颗粒态为主。由以上结果初步推论兰州市大气汞浓度显著受到人为活动的影响,且工业污染源和生活污染源均对大气汞浓度有所贡献;土壤和大气汞浓度未达到污染水平;兰州市黄河水体中汞浓度绝大部分超过《地面水环境质量标准》的Ⅲ类标准值。

多介质环境下木质素对化肥中N素迁移转化积累的影响

以木质素包膜复合肥为研究对象,通过淋溶、氨挥发和盆栽试验,系统研究了木质素包膜复合肥中N素在多介质环境(土壤、水体、大气和植物)下的迁移转化和积累,以及木质素对复合肥中N素的影响。结果表明,木质素包膜肥的氨挥发量明显低于普通复合肥,降幅达5.3%～17.7%,氨挥发量占总施N量的0.2%左右。施用木质素包膜复合肥能显著减少青贮玉米中硝酸盐的积累(P<0.01),最大降幅达20.3%;木质素包膜复合肥中N素的淋溶损失符合一级动力学方程,土壤中肥料的氨挥发符合零级动力学方程。研究认为,木质素能抑制土壤与肥料中N素的水解和硝化作用,调控土壤中矿质态N含量,减少N素的淋溶损失,对肥料中N素转化有很好的调控作用,木质素作为一种农业环境友好材料,应用前景广阔。

敦煌285窟多媒体集成虚拟展示

敦煌石窟是我国乃至世界佛教艺术的瑰宝 ,建于西魏的 2 85窟以壁画保存完整 ,内容丰富而成为敦煌石窟的精品之一 使用虚拟展示技术可以极大地方便人们对敦煌壁画艺术的欣赏 ,但是对于 2 85窟壁画上丰富的佛教故事无法充分的表达 提出了 2 85窟多媒体集成虚拟展示 ,对 2 85窟的三维模型进行多媒体嵌入支持扩展 ,通过在 3DS文件中增加多媒体信息结点 ,将三维模型与多媒体数据库进行有机整合 ;对热点区域建立基于对象而非基于面片的热点定义 ,有效地避免了在使用LOD方法中热点随面片简缩而消失的问题 ;在实时交互中将多媒体播放嵌入到虚拟场景中 ,增强了多媒体和虚拟环境的融合程度 通过多媒体集成虚拟展示 ,丰富了 2 85窟的表现形式 ,展现能力得到了增强 ,取得了较好的效果 文中对 2

有机污染物多介质环境的稳态非平衡模型

在稳态平衡模型的基础上，研究了有机污染物在多介质环境的稳态非平衡模型，并针对ＤＤＴ、１，２，４－ＴＣＢ、ＨＣＢ、ＰＣＢ和ＤＭＰ５种化合物进行了计算。结果表明，该模型只须通过污染物在水中的浓度以及该化合物的各种物理化学性质和环境参数就可计算环境各相中污染物的浓度、逸度和质量分布，从而预测污染物在多介质环境中的归趋。

多媒体环境下不同形式的注释对二语词汇附带学习的影响

本文研究在多媒体环境下4种不同注释形式,即汉语、英语、汉语+图画以及英语+图画,对中国学生词汇附带学习的影响。结果发现:除即时测试的填空任务外,汉语注释比英语注释更能促进词汇附带学习;文字和图画组合注释比只有文字的注释更有利于词汇附带学习;在4种注释中,汉语+图画的组合注释对词汇附带学习最有效;英语水平较高者利用注释附带学习词汇效果以及保持单词记忆均要显著好于英语水平较低者。

桌面虚拟化在多媒体教室管理中的应用

为了加强多媒体教室的建设和管理,创新了多媒体教室计算机终端的管理与维护,构建了新型多媒体教室管理系统。该系统利用基于桌面虚拟化技术实现对计算机的统一管理与维护,为教学提供高效、灵活的环境,提升了多媒体教室管理的整体支持能力和服务水平。

单甲脒等有机污染物多介质环境的动态模型

在稳态模型的基础上，研究了有机污染物在多介质环境的动态模型，并针对单甲脒、单甲脒盐酸盐、ＤＤＴ和ＤＭＰ等４种有机污染物作了计算．结果表明，这类模型对于研究有机污染物在多介质环境中随时间变化的行为是有效的．

单甲脒等有机污染物多介质环境的稳态平衡模型构建

本文对单甲脒等２０种有机污染物进行了物化参数（Ｋｏｗ，蒸汽压，水溶度，Ｋｏｃ和ＢＣＦ）的估计，针对池塘和农田２个生态系统构建了稳态平衡速度多介质环境数学模型，模型研究的初步结果表明该模型用于预测有机污染物在稳态平衡条件下多介质环境中浓度的分布有一定意义。对于大多数憎水性有机污染物，在土壤或沉积物中的含量大于水中含量，而水中含量又大于空气中的含量。对于亲水性有机污染物，在环境介质中含量水平的大小顺序则是水＞土壤或沉积物＞空气。上述两类有机染染物在环境介质中的含量水平都具有如下的顺序：叶＞根＞茎。所研究的２０种有机污染物在鱼体内的含量除了２－氯苯和ＤＥＨＰ外，其它所有化合物都差不多。

《福建省生态环境多媒体电子地图集》的设计

本文首先探讨了多媒体在电子地图集中的功能和作用,然后对图像、声音、视频、动画、文字等多媒体文件的类型和处理方法进行研究,并结合电子地图集的制作说明它们的具体作用。接着介绍了《福建省生态环境多媒体电子地图集》的系统设计、内容设计、功能设计和数据组织方法。最后以《福建省生态环境多媒体电子地图集》为例具体说明多媒体技术在电子地图集中的应用。