iPod的魅力让其他任何厂商的任何数码播放器系列都望尘莫及，而iProne的推出在改变人们对手机传统认识的时候，也再一次捍卫和巩固了苹果产品尊贵的地位。竞争对手得到的压力空前巨大，但配件厂商却积极地加入到和苹果产品一起发展的行...iPod的魅力让其他任何厂商的任何数码播放器系列都望尘莫及，而iProne的推出在改变人们对手机传统认识的时候，也再一次捍卫和巩固了苹果产品尊贵的地位。竞争对手得到的压力空前巨大，但配件厂商却积极地加入到和苹果产品一起发展的行列当中，过去的“Made for iPod”战略也逐渐扩展到了“Made for iPhone”，实现苹果和配件厂商双赢的效果。展开更多
The purpose for this article is to research the relationship between public transportation and real estate based on the area of East Lansing.Two methods are mainly used to analyze the data:correlation analysis and mea...The purpose for this article is to research the relationship between public transportation and real estate based on the area of East Lansing.Two methods are mainly used to analyze the data:correlation analysis and means analysis with the help of Statistical Package for the Social Sciences(SPSS) data analyzing software.There are two analysis results:(1) the real estate,which is closer to public transportation,will have higher value than that is far from public transportation,and(2) the number of bus in one bus stop has no obvious relation with the value of real estate.Based on these results,real estate developers could build residential real estate close to public transportation or bring public transportation in their real estate community by contract with transportation corporations.In sum,they should reasonably use public transportation as attractive features to convince people to prefer to their houses.展开更多
Geographic information Systems （GiS） is being widely applied to official construction activities nowadays. This technique can not only display graphs for each spatial data displayed, but also provide a broad predict...Geographic information Systems （GiS） is being widely applied to official construction activities nowadays. This technique can not only display graphs for each spatial data displayed, but also provide a broad prediction and decision tool. The purpose of this paper is to describe the capabilities of GIS application in building a new parking facility in the city of East Lansing through wide analysis of the surrounding data. The results are displayed in maps and graphs. Finally, the recommendation area is selected using three criteria： proximity to the downtown area; the degree of VACANT; and distance from all buffers.展开更多
The Distributed Queue Dual Bus(DQDB) Metropolitan Area Network(MAN) is a promising solution for the evolution from current networks to B-ISDN. The performance of the DQDB MAN for Local Area Networks(LANs) interconnect...The Distributed Queue Dual Bus(DQDB) Metropolitan Area Network(MAN) is a promising solution for the evolution from current networks to B-ISDN. The performance of the DQDB MAN for Local Area Networks(LANs) interconnection is analyzed. The effects of message length, traffic load of upstream and downstream nodes and the parameters of bandwidth balancing mechanism and network counters on the sojourn time of message in the buffer are investigated, which present a valuable reference for the implementation of the DQDB MAN.展开更多
For wired local area networks(LANs),their effectiveness and invulnerability are very critical.It is extraordinarily significant to evaluate the network performance effectively in the design of a reasonable network top...For wired local area networks(LANs),their effectiveness and invulnerability are very critical.It is extraordinarily significant to evaluate the network performance effectively in the design of a reasonable network topology and the performance improvement of the networks.However,there are many factors affecting the performance of the networks,and the relation among them is also complicated.How to evaluate the performance of the wired LANs more accurately has been a heavy challenge in the network research.In order to solve the problem,this paper presents a performance evaluation method that evaluates the effectiveness and invulnerability of the wired LANs.Compared to traditional statistical methods,it has the distinct advantage of being able to handle several dependent variables simultaneously and tolerates the measurement errors among these independent variables and dependent variables.Finally,the rationality and validity of this method are verified by the extensive experimental simulation.展开更多
When there are bigger obstacles in the indoor environment such as elevator, the radio waves basically can not penetrate it. The contribution of received signal strength by transmission and reflection will be greatly r...When there are bigger obstacles in the indoor environment such as elevator, the radio waves basically can not penetrate it. The contribution of received signal strength by transmission and reflection will be greatly reduced, and most of the time, the radio waves will reach the user by bypass diffraction. Therefore, the traditional path loss model is no longer applicable, and the improved model should be proposed. In this paper, we firstly proposed an indoor radio propagation model based on dominant path in which the received signal strength has nothing to do with the direct distance between user and access point, but is related to the length of dominant path. Then on the basis of dominant path model, the NLOS influence is considered in order to further improve the accuracy of dominant path model. Experimental results demonstrated that the proposed dominant path model can improve the accuracy of traditional path loss model remarkably.展开更多
文摘iPod的魅力让其他任何厂商的任何数码播放器系列都望尘莫及，而iProne的推出在改变人们对手机传统认识的时候，也再一次捍卫和巩固了苹果产品尊贵的地位。竞争对手得到的压力空前巨大，但配件厂商却积极地加入到和苹果产品一起发展的行列当中，过去的“Made for iPod”战略也逐渐扩展到了“Made for iPhone”，实现苹果和配件厂商双赢的效果。
文摘The purpose for this article is to research the relationship between public transportation and real estate based on the area of East Lansing.Two methods are mainly used to analyze the data:correlation analysis and means analysis with the help of Statistical Package for the Social Sciences(SPSS) data analyzing software.There are two analysis results:(1) the real estate,which is closer to public transportation,will have higher value than that is far from public transportation,and(2) the number of bus in one bus stop has no obvious relation with the value of real estate.Based on these results,real estate developers could build residential real estate close to public transportation or bring public transportation in their real estate community by contract with transportation corporations.In sum,they should reasonably use public transportation as attractive features to convince people to prefer to their houses.
文摘Geographic information Systems （GiS） is being widely applied to official construction activities nowadays. This technique can not only display graphs for each spatial data displayed, but also provide a broad prediction and decision tool. The purpose of this paper is to describe the capabilities of GIS application in building a new parking facility in the city of East Lansing through wide analysis of the surrounding data. The results are displayed in maps and graphs. Finally, the recommendation area is selected using three criteria： proximity to the downtown area; the degree of VACANT; and distance from all buffers.
基金Supported by the National Natural Science Foundation of Chinathe Foundation of the Institute of Electronic Science of China
文摘The Distributed Queue Dual Bus(DQDB) Metropolitan Area Network(MAN) is a promising solution for the evolution from current networks to B-ISDN. The performance of the DQDB MAN for Local Area Networks(LANs) interconnection is analyzed. The effects of message length, traffic load of upstream and downstream nodes and the parameters of bandwidth balancing mechanism and network counters on the sojourn time of message in the buffer are investigated, which present a valuable reference for the implementation of the DQDB MAN.
基金supported by the National Natural Science Foundations of China (Nos.61572435,61472305, 61473222)the Ningbo Natural Science Foundations(Nos. 2016A610035,2017A610119)+1 种基金the Complex Electronic System Simulation Laboratory (No.DXZT-JC-ZZ-2015015)the Joint Fund of China State Shipbuilding Corporation(No.6141B03010103)
文摘For wired local area networks(LANs),their effectiveness and invulnerability are very critical.It is extraordinarily significant to evaluate the network performance effectively in the design of a reasonable network topology and the performance improvement of the networks.However,there are many factors affecting the performance of the networks,and the relation among them is also complicated.How to evaluate the performance of the wired LANs more accurately has been a heavy challenge in the network research.In order to solve the problem,this paper presents a performance evaluation method that evaluates the effectiveness and invulnerability of the wired LANs.Compared to traditional statistical methods,it has the distinct advantage of being able to handle several dependent variables simultaneously and tolerates the measurement errors among these independent variables and dependent variables.Finally,the rationality and validity of this method are verified by the extensive experimental simulation.
文摘When there are bigger obstacles in the indoor environment such as elevator, the radio waves basically can not penetrate it. The contribution of received signal strength by transmission and reflection will be greatly reduced, and most of the time, the radio waves will reach the user by bypass diffraction. Therefore, the traditional path loss model is no longer applicable, and the improved model should be proposed. In this paper, we firstly proposed an indoor radio propagation model based on dominant path in which the received signal strength has nothing to do with the direct distance between user and access point, but is related to the length of dominant path. Then on the basis of dominant path model, the NLOS influence is considered in order to further improve the accuracy of dominant path model. Experimental results demonstrated that the proposed dominant path model can improve the accuracy of traditional path loss model remarkably.
