GUEST VLAN技术在网络管理中的应用

目前，大型网络普遍采用认证技术，非授权用户一般无法使用网络资源。尽管这是安全管理的需要，但是在实际使用中，如果采用802．1X的认证方式，客户端软件的下发和升级的工作量将会很大，最理想的方法是能够采用用户自助方式。但是在未经过认证之前，通常接入交换机的端口是关闭的，无法访问任何资源。同时。对外单位来访用户需要访问公共资源，使用公共账号的方式也存在安全隐患。采用动态VLAN和GUEST VLAN技术就可以很好地解决这些问题。

Molecular dynamics simulation of structure H clathrate-hydrates of binary guest molecules

Molecular dynamics （MD） simulations are performed to study the stability of structure H clathrate-hydrates of methane＋large-molecule guest substance （LMGS） at temperatures of 270, 273, 278 and 280 K under canonical （NVT-） ensemble condition in a 3×3×3 structure H unit cell replica with 918 TIP4P water molecules. The studied LMGS are 2-methylbutane （2-MB）, 2,3-dimethylbutane （2,3-DMB）, neohexane （NH）, methylcyclohexane （MCH）, adamantane and tert-butyl methyl ether （TBME）. In the process of MD simulation, achieving equilibrium of the studied system is recognized by stability in calculated pressure for NVT-ensemble. So, for the accuracy of MD simulations, the obtained pressures are compared with the experimental phase diagrams. Therefore, the obtained equilibrium pressures by MD simulations are presented for studying the structure H clathrate-hydrates. The results show that the calculated temperature and pressure conditions by MD simulations are consistent with the experimental phase diagrams. Also, the radial distribution functions （RDFs） of host-host, host-guest and guest-guest molecules are used to analysis the characteristic configurations of the structure H clathrate-hydrate.

Preparation, Characterization and Optical Properties of Host-guest Nanocomposite Material Mordenite-silver Iodide

Silver iodide nanoclusters were successfully prepared in the channels of mordenite by a heat diffusion method. Powder X ray diffraction, adsorption technique and infrared spectroscopy were used to characterize the prepared materials, which showed that the guest silver iodide had been encapsulated in the channels of mordenite. The optical properties of the solid phase diffuse reflectance absorption of nanocomposite material NaM AgI were studied, showing that the absorption bands of the diffuse reflectance absorption of the prepared material moved to the region of high energy. The absorption peak of the material prepared shifted to the region of high energy. Namely, blue shift was caused. This has demonstrated the incorporation of silver iodide into the channels of the zeolite. We observed the luminescence and surface photovoltage spectra of NaM AgI sample, proposing the mechanisms of the photoluminescence and photovoltaic responses.

动态VLAN和Guest VLAN技术在校园网中的应用

介绍了VLAN技术及其在校园网用户认证中的应用。VLAN技术为解决网络配置和管理提供了良好的方法,随着网络的不断发展,VLAN技术将得到更加广泛的应用。

Guest Editorial-Special issue on advances in mine safety science ＆ engineering

Mine safety encompasses many aspects of a mining operation,ranging from personnel and equipment safety to the safety of the environment.Mine disasters such as fires,floods,explosions,outbursts,rockbursts,ground caving,pit slope slides,and tailings dam failures,pose serious threats to the lives of mine operators,

Words from the Guest Editor-in-Chief

PSESP(Plant Species with Extremely Small Populations)is a new concept developed to rescue the most globally threatened plant species.It first appeared in'Proposal for the Extremely Small Population protection project for the endemic plants and animals of Yunnan',a report submitted to China's State Forestry Administration(SFA)through the Yunnan Forestry Department(YFD)in 2005.In September 2009,four years after the launch of the project。

Guest Vlan在校园网络中的应用

伴随校园内网络的普及,安全日益成为影响校园网络效能的瓶颈,校园网络安全已经成为人们最为关注的事情。802.1x运用在校园网上,增强了网络的安全性。但在部署802.1x的时候,碰到了不少障碍。对校园网内部署802.1x存在的问题进行了研究,并根据实践介绍了一种过渡解决方案—Guest Vlan,用它可解决802.1x部署过程中遇到的问题。

IoT-based Smart and Complex Systems：A Guest Editorial Report

THE Industrial Revolution starting from about 1760 and ending at around 1840 has been viewed as the first Industrial Revolution.It features with the replacement of human and animal muscle power with steam and mechanical power.Human income per capita had taken 800 years to double by

The Guest Star of AD185 must have been a Supernova

The ＂guest star＂ of AD185, recorded in the ancient Chinese history the Houhanshu, has been widely regarded as a supernova. However, some authors have suggested that the guest star might have been a comet. It has also been proposed that the record is the concatenation of a nova with a comet made by an early compiler. We have checked the record of the guest star, comparing it with records of comets in the same history. We find that most descriptions of comets clearly indicate motion, whereas the record of the guest star does not. We further argue that the term ＂yan＂ used to describe the star＇s ＂size＂ might be short for yanchuang （seat bed）, and ＂half a yan＂ would be simply as an imaginary figuration of the ancient observer. Moreover, we show that the term ＂hou -year＂ （hou-nian） most probably means the year after next. We argue that the asterism Southern Gate consisted of the stars α andβ Cen. We conclude that the record describing the guest star of AD 185 is completely different from any comet record in the same history, and that it almost certainly was a supernova.

Guest Editorial Special Issue on Mid-Infrared Lasers and Applications

Mid-infrared （mid-IR） lasers, generally defined as having an operation wavelength in the spectral region of 2μm to 20μm, have attracted great scientific and technological interests owing to their widespread applications. This wavelength range not only contains some strong vibration transitions of many important molecules, thus, exhibiting enormous potential in medical, spectroscopy.

Friendly enemies--Character analysis of Guests of the nation by Frank O＇Conner

The paper focuses on the four soldiers away from the battle field depicted in the short story Guests oftke nation written by Frank O＇Conner. The character analysis is achieved by the reflection of the human nature when the soldiers were temporarily living peacefully and their painful conflicts between duty as soldiers and human nature as men. Through the tragic fate of both the two executed Englishmen and the executors--two Irish men, the cruelty of the war is strongly condemned. The war mercilessly defeated the human nature cultivated through the friendship and knowing with each other.

Guest Editorial for Special Issue on Human-centered Intelligent Robots:Issues and Challenges

The special issue aims to address a broad spectrum of topics ranging from human-centered intelligent robots acting as a servant,secretary,or companion to intelligent robotic functions.The special issue publishes original papers of innovative ideas and concepts,new discoveries,and novel applications and business models relevant to the field of human-centered intelligent robots.In this special issue,modeling,intelligent control,

Guest账户无法禁用？

白山发电厂在执行国家电网公司“内网系统桌面安全策略管理”工作中，发现较多终端电脑的Windows XP操作系统中提示账户弱口令，尤其是在Windows XP Home Edition操作系统中也提示Guest账户弱口令的问题。

Guest Editorial-Special Issue on Science and Technology of Soft Rocks

Soft rocks are a critical geomaterial presenting several kinds of problems.They present undesirable behaviors such as low strength,disaggregation,high plasticity,slaking,weathering and other characteristics.These behaviors prevent their utilization or tend to avoid sites dominated by soft rocks for important engineer-

京都Guest House合庭——高端民宿设计

B.L.U.E.建筑设计事务所于2014年成立于北京,由日本建筑师青山周平和藤井洋子共同创建,是面向建筑以及建筑室内设计方向的充满年轻活力的建筑设计事务所。B.L.U.E.是Beijing Laboratory for Urban Environment的略称,以厚重历史和先锐思潮碰撞激烈、经济发展迅速的北京为中心,通过设计师的创造、思考、建筑、室内、艺术、产品等设计实践,来实现对城市的物理、社会、文化环境等方面的研究,即事务所一直以来的目标——创造一个连接城市环境的设计平台。

Guest Editorial for Special Issue on Fractional Order Systems and Controls

I.INTRODUCTION FRACTIONAL calculus has been applied in all MAD(modeling,analysis and design)aspects of control systems engineering since Shunji Manabe’s pioneering work in early 1960s.The 2016 International Conference on Fractional Differentiation and Its Applications(ICFDA)was held in Novi Sad,Serbia,July 18-20.Quoting from the

Guest Editorial Special Section on Quantum Information Processing

Quantum information processing is an active cross-disciplinary field drawing upon theoretical and experimental physics, computer science, engineering, mathematics, and material science. Its scope ranges from fundamental issues in quantum physics to prospective commercial exploitation by the computing and communications industries.

Guest editorial-special issue on ground control in mining in 2018

Ground control is the science of studying and controlling the behavior of rock strata in response to mining operations. Ground control-related research has seen significant advancements over the last 37 years, and these accomplishments are well documented in the proceedings of the annual International Conference on Ground Control in Mining (ICGCM)(1)The ICGCM is a forum to promote closer communication among researchers, consultants。

Guest editorial–Special issue on ground control in mining in 2017

Ground control is the science of studying and controlling the behavior of rock strata in response to mining operations.Ground control-related research has seen significant advancements over the last 36 years,and these accomplishments are well documented in the proceedings of the annual International Conference on Ground Control in Mining(ICGCM)[1].The ICGCM is a forum to promote closer communication among researchers,consultants,regulators,manufacturers,and mine operators to expedite solutions to ground control problems in mining[2–8].Fundamental research and advancements in ground control science define the central core of the conference mission.Providing information to mine operators is a priority,as the conference goal is to offer solution-oriented information.In addition,the conference has included innovative technologies and ideas in mining-related fields such as exploration,geology,and surface and underground mining.Many new ground control technologies and design standards adopted by the mining industry were first discussed at ICGCM.Therefore,this conference is recognized as the best forum for introducing new ground control-related research and products.

Guest Editorial:Intelligent Video Surveillance and Related Technologies

Due to the increasing demand for developing a secure and smart living environment, the intelligent video surveillance technology has attracted considerable attention. Building an automatic, reliable, secure, and intelligent video surveillance system has spawned large research projects and triggered many popular research topics in several international conferences and workshops recently. This special issue of Journal of ElecWonic Science and Technology （JEST） aims to present recent advances in video surveillance systems which address the observation of people in an environment, leading to a real-time description of their actions and interactions.