This paper proposed a watermarking algorithm for tamper-proof of web pages. For a web page, it generates a watermark consisting of a sequence of Space and Tab. The wa termark is then embedded into the web page after e...This paper proposed a watermarking algorithm for tamper-proof of web pages. For a web page, it generates a watermark consisting of a sequence of Space and Tab. The wa termark is then embedded into the web page after each word and each line. When a watermarked web page is tampered, the extracted watermark can detect and locate the modifications to the web page. Besides, the framework of watermarked Web Server system was given. Compared with traditional digital signature methods, this watermarking method is more transparent in that there is no necessary to detach the watermark before displaying web pages. The e xperimental results show that the proposed scheme is an effective tool for tamper-proof of web pages.展开更多
Delay/Disruption-Tolerant Networking(DTN) originated from research on Interplanetary Internet and still today space applications are the most important application field and research stimulus. This paper investigates ...Delay/Disruption-Tolerant Networking(DTN) originated from research on Interplanetary Internet and still today space applications are the most important application field and research stimulus. This paper investigates DTN communications between the Earth and the far side of the Moon, by means of a lunar orbiter acting as relay. After an introductory part, the paper presents a comprehensive analysis of the DTN performance that can be achieved on the identified communication scenario. The focus is on the evaluation of the stateof-the-art ability of Interplanetary Overlay Network(ION), the NASA DTN implementation of Bundle Protocol(BP) and Contact Graph Routing(CGR), to meet the many challenges of the space communication scenario investigated(and more generally of a future interplaynetary Internet): intermittent links, network partitioning, scarce bandwidth, long delays, dynamic routing, handling of high priority and emergency traffic, interoperability issues. A study of security threats and Bundle Security Protocol(BSP) countermeasures complete the work.The many results provided, confirm the essential role of DTN in future space communications.展开更多
The cellular neural/nonlinear network (CNN) is a powerful tool for image and video signal processing,robotic and biological visions. This paper discusses a general method for designing template of the global connectiv...The cellular neural/nonlinear network (CNN) is a powerful tool for image and video signal processing,robotic and biological visions. This paper discusses a general method for designing template of the global connectivitydetection (GCD) CNN, which provides parameter inequalities for determining parameter intervals for implementing thecorresponding functions. The GCD CNN has stronger ability and faster rate for determining global connectivity in binarypatterns than the GCD CNN proposed by Zarandy. An example for detecting the connectivity in complex patterns isgiven.展开更多
The architecture of cislunar multi-hop communication networks, which focuses on the requirements of lunar full-coverage and continuous cislunar communications, is presented on the basis of Geosynchronous Orbit (GEO) s...The architecture of cislunar multi-hop communication networks, which focuses on the requirements of lunar full-coverage and continuous cislunar communications, is presented on the basis of Geosynchronous Orbit (GEO) satellite network relays. According to the geographical distribution of the forthcoming Chinese Deep Space Measuring and Controlling Network (DSMCN), two networking schemes are proposed and two elevation angle optimization models are established for locating GEO relay satellites. To analyze the dynamic connectivity, a dynamic network model is constructed with respect to the time-varying characteristics of cislunar trunk links. The advantages of the two proposed schemes, in terms of the Connectivity Rate (CR), Interruption Frequency (IF), and Average Length of Connecting Duration (ALCD), are corroborated by several simulations. In the case of the lunar polar orbit constellation case, the gains in the performance of scheme I are observed to be 134.55%, 117.03%, and 217.47% compared with DSMCN for three evaluation indicators, and the gains in the performance of scheme II are observed to be 238. 22%, 240.40%, and 572.71%. The results validate that the connectivity of GEO satellites outperforms that of earth facilities significantly and schemes based on GEO satellite relays are promising options for cislunar multi-hop communication networking.展开更多
English is the universal language. With the development of economic and cultural globalization, the demand for English has gradually increased. Traditional college English teaching cannot meet real requirement, so col...English is the universal language. With the development of economic and cultural globalization, the demand for English has gradually increased. Traditional college English teaching cannot meet real requirement, so college English teaching reform is imperative. With the development of online platform, the Internet has brought a great impetus to the curriculum reform. The author thinks that ＂MOOC＂ and College English Teaching Reform have a good point of combining, but there is still a problem remaining to be solved： How to make good use of＂MOOC＂ for College English Teaching Reform service has a lot study space in the future.展开更多
Along with worldwide Internet boom, China's Internet industry is also thriving and has achieved remarkable success. Beyond that, industry integration between the Internet and other fields, such as finance, retail ...Along with worldwide Internet boom, China's Internet industry is also thriving and has achieved remarkable success. Beyond that, industry integration between the Internet and other fields, such as finance, retail and advertising, is also eye-taking, as it has fostered a novel industry chain structure and business model. With an aim to realize the transformation and upgrading of conventional industry, the Chinese government has proposed ‘Internet plus' to encourage the combination of the Internet and conventional sectors. As one of the most important and complex conventional industries, the oil and gas(O&G in abbreviation) industry is also seeking the opportunity to actively cooperate with the Internet. However, after analysis of the differences between the particularities of the O&G and Internet industry from an economics perspective, a comprehensive combination of these two seems less promising, but adopting Internet related technologies to improve the performance of the O&G industry is feasible.展开更多
Vehicular Ad Hoc Network （VANET） has emerged as a new wireless network for vehicular communications. To provide a flexible and high reliable communication service in VANET, vehicles are clustered to construct many s...Vehicular Ad Hoc Network （VANET） has emerged as a new wireless network for vehicular communications. To provide a flexible and high reliable communication service in VANET, vehicles are clustered to construct many small networks （clusters） so that channel interferences and flooding messages can be limited. This research presents a novel Multi-Resolution Relative Speed Detection （MRSD） model to improve the clustering algorithm in VANET without using Global Positioning System （GPS）. MRSD uses the Moving Average Convergence Divergence （MACD）, the Momentum of Received Signal Strength （MRSS）, and Artificial Neural Networks （ANNs） to estimate the motion state and the relative speed of a vehicle based purely on Received Signal Strength. The proposed MRSD model is accurate with the assistance of the intelligent classification, and incurs less overhead in the cluster head election than that of other algorithms.展开更多
The Internet and mobile internet have made the transaction of a huge number of products and services possible in ways previously unimaginable, exerting an extensive and profound influence on commercial, industrial, fi...The Internet and mobile internet have made the transaction of a huge number of products and services possible in ways previously unimaginable, exerting an extensive and profound influence on commercial, industrial, financial and even medical enterprises, universities and government agencies. All of this wide variety of transformations can be distilled into the concept of ＂Internet thinking. ＂ This paper poses that internet thinking consists of the following three levels. First is lnternet spirit, i.e., openness, equality, collaboration and sharing. Second is Internet philosophy, including interconnection between virtual and real entities, elimination of restrictions of time and space, modularization, personal imperialism, crowdsourcing and user-centered approaches. Third is the Internet economy, featuring long-tail theory at a technical level, market equilibrium theory at the level of transaction structure and consumer sovereignty theory at the level of transaction performance. According to Internet thinking, traditional firms must be transformed towards smart organizations characterized by network-based ecosystem, global integration, platform-based operation, users as contributors, borderless development and self- organizing management. As rightly pointed out by the CEO of Haier Group Zhang Ruimin, ＂There is no such a thing as a successful firm; there are only firms defined by their times. ＂ Adapting to the times is key to the survival of all firms.展开更多
文摘This paper proposed a watermarking algorithm for tamper-proof of web pages. For a web page, it generates a watermark consisting of a sequence of Space and Tab. The wa termark is then embedded into the web page after each word and each line. When a watermarked web page is tampered, the extracted watermark can detect and locate the modifications to the web page. Besides, the framework of watermarked Web Server system was given. Compared with traditional digital signature methods, this watermarking method is more transparent in that there is no necessary to detach the watermark before displaying web pages. The e xperimental results show that the proposed scheme is an effective tool for tamper-proof of web pages.
文摘Delay/Disruption-Tolerant Networking(DTN) originated from research on Interplanetary Internet and still today space applications are the most important application field and research stimulus. This paper investigates DTN communications between the Earth and the far side of the Moon, by means of a lunar orbiter acting as relay. After an introductory part, the paper presents a comprehensive analysis of the DTN performance that can be achieved on the identified communication scenario. The focus is on the evaluation of the stateof-the-art ability of Interplanetary Overlay Network(ION), the NASA DTN implementation of Bundle Protocol(BP) and Contact Graph Routing(CGR), to meet the many challenges of the space communication scenario investigated(and more generally of a future interplaynetary Internet): intermittent links, network partitioning, scarce bandwidth, long delays, dynamic routing, handling of high priority and emergency traffic, interoperability issues. A study of security threats and Bundle Security Protocol(BSP) countermeasures complete the work.The many results provided, confirm the essential role of DTN in future space communications.
文摘The cellular neural/nonlinear network (CNN) is a powerful tool for image and video signal processing,robotic and biological visions. This paper discusses a general method for designing template of the global connectivitydetection (GCD) CNN, which provides parameter inequalities for determining parameter intervals for implementing thecorresponding functions. The GCD CNN has stronger ability and faster rate for determining global connectivity in binarypatterns than the GCD CNN proposed by Zarandy. An example for detecting the connectivity in complex patterns isgiven.
基金supported by the National High Technology Research and Development Program of P.R.China under Grant No.2012 AA121604 the National Natural Science Foundation of China under Grants No.60902042,No.61170014,No.61202079+1 种基金 the National Research Foundation for the Doctoral Program of Higher Education of China under Grant No.20090006110014 the Foundation for Key Program of Ministry of Education of China under Grant No.311007
文摘The architecture of cislunar multi-hop communication networks, which focuses on the requirements of lunar full-coverage and continuous cislunar communications, is presented on the basis of Geosynchronous Orbit (GEO) satellite network relays. According to the geographical distribution of the forthcoming Chinese Deep Space Measuring and Controlling Network (DSMCN), two networking schemes are proposed and two elevation angle optimization models are established for locating GEO relay satellites. To analyze the dynamic connectivity, a dynamic network model is constructed with respect to the time-varying characteristics of cislunar trunk links. The advantages of the two proposed schemes, in terms of the Connectivity Rate (CR), Interruption Frequency (IF), and Average Length of Connecting Duration (ALCD), are corroborated by several simulations. In the case of the lunar polar orbit constellation case, the gains in the performance of scheme I are observed to be 134.55%, 117.03%, and 217.47% compared with DSMCN for three evaluation indicators, and the gains in the performance of scheme II are observed to be 238. 22%, 240.40%, and 572.71%. The results validate that the connectivity of GEO satellites outperforms that of earth facilities significantly and schemes based on GEO satellite relays are promising options for cislunar multi-hop communication networking.
文摘English is the universal language. With the development of economic and cultural globalization, the demand for English has gradually increased. Traditional college English teaching cannot meet real requirement, so college English teaching reform is imperative. With the development of online platform, the Internet has brought a great impetus to the curriculum reform. The author thinks that ＂MOOC＂ and College English Teaching Reform have a good point of combining, but there is still a problem remaining to be solved： How to make good use of＂MOOC＂ for College English Teaching Reform service has a lot study space in the future.
文摘Along with worldwide Internet boom, China's Internet industry is also thriving and has achieved remarkable success. Beyond that, industry integration between the Internet and other fields, such as finance, retail and advertising, is also eye-taking, as it has fostered a novel industry chain structure and business model. With an aim to realize the transformation and upgrading of conventional industry, the Chinese government has proposed ‘Internet plus' to encourage the combination of the Internet and conventional sectors. As one of the most important and complex conventional industries, the oil and gas(O&G in abbreviation) industry is also seeking the opportunity to actively cooperate with the Internet. However, after analysis of the differences between the particularities of the O&G and Internet industry from an economics perspective, a comprehensive combination of these two seems less promising, but adopting Internet related technologies to improve the performance of the O&G industry is feasible.
文摘Vehicular Ad Hoc Network （VANET） has emerged as a new wireless network for vehicular communications. To provide a flexible and high reliable communication service in VANET, vehicles are clustered to construct many small networks （clusters） so that channel interferences and flooding messages can be limited. This research presents a novel Multi-Resolution Relative Speed Detection （MRSD） model to improve the clustering algorithm in VANET without using Global Positioning System （GPS）. MRSD uses the Moving Average Convergence Divergence （MACD）, the Momentum of Received Signal Strength （MRSS）, and Artificial Neural Networks （ANNs） to estimate the motion state and the relative speed of a vehicle based purely on Received Signal Strength. The proposed MRSD model is accurate with the assistance of the intelligent classification, and incurs less overhead in the cluster head election than that of other algorithms.
文摘The Internet and mobile internet have made the transaction of a huge number of products and services possible in ways previously unimaginable, exerting an extensive and profound influence on commercial, industrial, financial and even medical enterprises, universities and government agencies. All of this wide variety of transformations can be distilled into the concept of ＂Internet thinking. ＂ This paper poses that internet thinking consists of the following three levels. First is lnternet spirit, i.e., openness, equality, collaboration and sharing. Second is Internet philosophy, including interconnection between virtual and real entities, elimination of restrictions of time and space, modularization, personal imperialism, crowdsourcing and user-centered approaches. Third is the Internet economy, featuring long-tail theory at a technical level, market equilibrium theory at the level of transaction structure and consumer sovereignty theory at the level of transaction performance. According to Internet thinking, traditional firms must be transformed towards smart organizations characterized by network-based ecosystem, global integration, platform-based operation, users as contributors, borderless development and self- organizing management. As rightly pointed out by the CEO of Haier Group Zhang Ruimin, ＂There is no such a thing as a successful firm; there are only firms defined by their times. ＂ Adapting to the times is key to the survival of all firms.
