Super High Definition (SHD) movies were successfully transmitted as streaming contents at about 300 Mbps for the first time over a long distance IP network (more than 3,000 km), in conjunction with the experimental ve...Super High Definition (SHD) movies were successfully transmitted as streaming contents at about 300 Mbps for the first time over a long distance IP network (more than 3,000 km), in conjunction with the experimental verification of traffic control and scalable multicast technologies.展开更多
In this paper, we report research on how to design the tele-network. First of all, we defined the reliability of tele-network. According to the definition, we divide the whole reliability into two parts:the reliabilit...In this paper, we report research on how to design the tele-network. First of all, we defined the reliability of tele-network. According to the definition, we divide the whole reliability into two parts:the reliability of the mini-way and that of the whole system. Then we do algebra unintersection of the mini-way, deriving a function of reliability of tele-network. Also, we got a function of the cost of tele-network after analyzing the cost of arcs and points. Finally, we give a mathematical model to design a tele-network. For the algorithm, we define the distance of a network and adjacent area within certain boundaries . We present a new algorithm--Queue Competition Algorithm (QCA) based on the adjacent area . The QCA correlates sequence of fitnesses in their father-generations with hunting zone of mutation and the number of individuals generated by mutation, making the stronger fitness in a small zone converge at a local extreme value, but the weaker one takes the advantage of lots of individuals and a big zone to hunt a new local extreme value. In this way, we get the overall extreme value. Numerical simulation shows that we can get the efficient hunting and exact solution by using QCA. The QCA efficient hunting and exact solution.展开更多
A new solution of combination network of GPS and high precise distance measurements with EDM is proposed. Meanwhile, it’s inadvisable only using GPS network without distance measurements. Three schemes: terrestrial n...A new solution of combination network of GPS and high precise distance measurements with EDM is proposed. Meanwhile, it’s inadvisable only using GPS network without distance measurements. Three schemes: terrestrial network, GPS network and combination network are discussed for horizontal control network design of Xiangjiaba Dam in view of precision, reliability, coordinate and outlay in detail.展开更多
With the popularity of online teaching of hearing and speaking, the problem of imbalance in rehabilitation education for hearing-impaired children caused by distance has been effectively solved, and at the same time, ...With the popularity of online teaching of hearing and speaking, the problem of imbalance in rehabilitation education for hearing-impaired children caused by distance has been effectively solved, and at the same time, the rehabilitation progress of hearing-impaired children's families under the general environment of epidemic prevention and control has been effectively guaranteed. As parents themselves play a leading role in rehabilitation teaching and the development of auditory spoken language online teaching makes teachers and parents of hearing-impaired children unable to get in close contact, the improvement of parents' effectiveness has become an important factor to ensure the effectiveness of remote auditory spoken language teaching. Therefore, how to effectively improve the effectiveness of parents' family rehabilitation through distance oral hearing teaching is an urgent problem for oral hearing teachers.展开更多
The network-constrained flow is defined as the movement between two locations along road networks,such as the residence-workplace flow of city dwellers.Among flow patterns,clustering(i.e.the origins and destinations a...The network-constrained flow is defined as the movement between two locations along road networks,such as the residence-workplace flow of city dwellers.Among flow patterns,clustering(i.e.the origins and destinations are aggregated simultaneously)is one of the cities’most common and vital patterns,which assists in uncovering fundamental mobility trends.The existing methods for detecting the clustering pattern of network-constrained flows do not consider the impact of road network topology complexity on detection results.They may underestimate the flow clustering between networks of simple topology(roads with simpler shapes and fewer links,e.g.straight roads)but with high network intensity(i.e.flow number per network flow space),and determining the actual scale of an observed pattern remains challenging.This study develops a novel method,the lengthsquared L-function,to identify clustering patterns of networkconstrained flows.We first use the L-function and its derivative to examine the clustering scales.Further,we calculate the local L-function to ascertain the locations of the clustering patterns.In synthetic and practical experiments,our method can identify flow clustering patterns of high intensities and reveal the residents’main travel behavior trends with taxi OD flows,providing more reasonable suggestions for urban planning.展开更多
文摘Super High Definition (SHD) movies were successfully transmitted as streaming contents at about 300 Mbps for the first time over a long distance IP network (more than 3,000 km), in conjunction with the experimental verification of traffic control and scalable multicast technologies.
基金Supported by the National Natura1 Science Foundation of China(70071042,60073043,60133010)
文摘In this paper, we report research on how to design the tele-network. First of all, we defined the reliability of tele-network. According to the definition, we divide the whole reliability into two parts:the reliability of the mini-way and that of the whole system. Then we do algebra unintersection of the mini-way, deriving a function of reliability of tele-network. Also, we got a function of the cost of tele-network after analyzing the cost of arcs and points. Finally, we give a mathematical model to design a tele-network. For the algorithm, we define the distance of a network and adjacent area within certain boundaries . We present a new algorithm--Queue Competition Algorithm (QCA) based on the adjacent area . The QCA correlates sequence of fitnesses in their father-generations with hunting zone of mutation and the number of individuals generated by mutation, making the stronger fitness in a small zone converge at a local extreme value, but the weaker one takes the advantage of lots of individuals and a big zone to hunt a new local extreme value. In this way, we get the overall extreme value. Numerical simulation shows that we can get the efficient hunting and exact solution by using QCA. The QCA efficient hunting and exact solution.
基金Supported bythe National 973 Programof China(No.2003CB716705) International Cooperative Fund of European Union(No.EVGI-CT-2002-00061) .
文摘A new solution of combination network of GPS and high precise distance measurements with EDM is proposed. Meanwhile, it’s inadvisable only using GPS network without distance measurements. Three schemes: terrestrial network, GPS network and combination network are discussed for horizontal control network design of Xiangjiaba Dam in view of precision, reliability, coordinate and outlay in detail.
文摘With the popularity of online teaching of hearing and speaking, the problem of imbalance in rehabilitation education for hearing-impaired children caused by distance has been effectively solved, and at the same time, the rehabilitation progress of hearing-impaired children's families under the general environment of epidemic prevention and control has been effectively guaranteed. As parents themselves play a leading role in rehabilitation teaching and the development of auditory spoken language online teaching makes teachers and parents of hearing-impaired children unable to get in close contact, the improvement of parents' effectiveness has become an important factor to ensure the effectiveness of remote auditory spoken language teaching. Therefore, how to effectively improve the effectiveness of parents' family rehabilitation through distance oral hearing teaching is an urgent problem for oral hearing teachers.
基金supported by the National Key R&D Program of China[Grant No.2022YFC3800803]the National Natural Science Foundation of China[Grant No.42071436]the Innovation Project of LREIS[Grant No.KPI002].
文摘The network-constrained flow is defined as the movement between two locations along road networks,such as the residence-workplace flow of city dwellers.Among flow patterns,clustering(i.e.the origins and destinations are aggregated simultaneously)is one of the cities’most common and vital patterns,which assists in uncovering fundamental mobility trends.The existing methods for detecting the clustering pattern of network-constrained flows do not consider the impact of road network topology complexity on detection results.They may underestimate the flow clustering between networks of simple topology(roads with simpler shapes and fewer links,e.g.straight roads)but with high network intensity(i.e.flow number per network flow space),and determining the actual scale of an observed pattern remains challenging.This study develops a novel method,the lengthsquared L-function,to identify clustering patterns of networkconstrained flows.We first use the L-function and its derivative to examine the clustering scales.Further,we calculate the local L-function to ascertain the locations of the clustering patterns.In synthetic and practical experiments,our method can identify flow clustering patterns of high intensities and reveal the residents’main travel behavior trends with taxi OD flows,providing more reasonable suggestions for urban planning.
