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Search Results: 1 - 10 of 24729 matches for " Xin Guan "
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On the Realization of Citizen’s Abidance by Law
Cross-Cultural Communication , 2013, DOI: 10.3968/3279
Abstract: The realization of citizen’s abidance by law depends on the establishment of legal norm and public’s acceptance on them. The setup of legal norm is the premise for citizen’s abidance by law. Legal norm should have the quality of conscience law, especially must contain the spirit of tolerance in modern society so that to create legal environment. Citizen’s acceptance on legal norm is necessary condition for the realization of abidance by law which must be originated by the concept of contract and the theoretical logic of keeping promise. It has to make interest as mental requirement, treat fairness and justice as internal quality, and rely on citizens that have legal consciousness. Key words: Citizen’s abidance by law; Legal norm; Ethics of abidance by law
Multicast Capacity Analysis for High Mobility Social Proximity Machine-to-Machine Networks
Xin Guan
International Journal of Distributed Sensor Networks , 2013, DOI: 10.1155/2013/234728
Abstract: Wireless machine-to-machine (M2M) networks enable ubiquitous sensing and controlling via sensors, vehicles, and other types of wireless nodes. Capacity scaling law is one of the fundamental properties for high mobility M2M networks. As for high mobility M2M networks, vehicular ad hoc networks (VANETs) are a typical case. Since vehicles have social property, their moving trajectory is according to the fixed community. With the purpose of transmitting packets to different communities of VANETs and further improving the network capacity, we study the multicast capacity of bus-assisted VANETs in two scenarios: forwarding scenario and routing scenario. All the ordinary vehicles obey the restricted mobility model. Thus, the spatial stationary distribution decays as power law with the distance from the center spot of a restrict region of each vehicle. In forwarding scenario, all the buses deployed in all roads as intermediate nodes are used to forward packets for ordinary vehicles. In routing scenario, buses and ordinary cars construct a highway path supported by percolation theory to transmit urgent packets. Each ordinary vehicle randomly chooses vehicles from the other ordinary vehicles as receivers. For the two kinds of scenarios, we derived the upper bound and lower bound, respectively. 1. Introduction In recent years, M2M networks have been a subject of intense interests due to the rapid evolution of wireless communication systems. M2M networks can be used to enable a wide variety of automated complex operations, which include advanced sensing, remote control, and monitoring technologies. M2M networks have many differences compared with conventional wireless networks because M2M is a machine-oriented networking technology. First of all, M2M networks commonly need to support a large number of devices. Second, power consumption of M2M devices is very important due to the limited battery capacity. Third, various data transfer delay requirements may exist depending on the M2M application being executed [1, 2]. Examples of M2M communications networks include vehicular ad hoc networks (VANETs) [3], underwater sensor networks (UWSNs) [4], wireless body area networks (WBANs) [5], and wireless mobile social networks [6–8]. Capacity scaling laws of wireless networks have attracted a lot of attention. Since Gupta and Kumar initiated the study of capacity scaling laws of ad hoc networks [9], the capacity of different types of wireless networks has been widely studied, such as sensor networks, ad hoc networks, cellular networks, vehicular networks, and so forth.
Trajectory Optimization of Packet Ferries in Opportunistic Social-Based Machine-to-Machine Networks
Xin Guan
International Journal of Distributed Sensor Networks , 2013, DOI: 10.1155/2013/895078
Abstract: Machine-to-machine (M2M) communication is an emerging paradigm to connect a large number of devices through wireless technologies. In recent application scenarios, devices are normally carried by people in social contexts. Like the behavior of people, the moving activity of devices always happens in a specific area, which corresponds to some specific communities. How to guarantee the higher packet delivery ratio while reducing forwarding delay in such M2M networks is a challenging issue and has not been well addressed yet. In this paper, we put some special mobile devices (called postmen) in the opportunistic social-based M2M networks and their main responsibility is to carry packets for normal devices which belong to specific communities. Our work focuses on the optimization of the moving trajectory by considering the minimum transmission delay. We formulate the optimal issue into semi-Markov Decision Process model. The decision process includes two parts: packets-choosing strategy and trajectory of packet-ferrying determination strategy. By maximizing the individual reward of a postman, its optimal trajectory will be found. Furthermore, the proposed solution guarantees the packet delivery ratio and delay for isolated communities. Simulation results show that the proposed packet-ferrying solution outperforms the two existing ferrying solutions in terms of packet delivery ratio. 1. Introduction With the development of wireless technology [1–3], the progress in short range networking, growth of wireless mobile networks, and advances in device networking have allowed the development of a new technology, machine-to-machine (M2M) communications [4], which has recently received considerable attention [5, 6]. Features such as self-organization, ease of deployment, low cost, and infrastructurelessness bring to wireless M2M networks the advantages of robustness, easy maintenance, economy, and flexibility. Therefore, M2M networks are envisioned to be the key technology for next generation wireless networks [7]. An M2M network consists of a large number of self-organized and self-configured nodes. In some real application scenarios, nodes are carried by people; the behavior of human being reflects on the node. Then, these nodes which are carried by people have the social property. As we know, mobile social network belongs to a typical application branch of M2M network, so, we call it social-based M2M network. Due to the sparse distribution of nodes, it is difficult to guarantee permanent forwarding path between the source and destination nodes [8]. In such case,
Quantum-Inspired Particle Swarm Optimization Algorithm Encoded by Probability Amplitudes of Multi-Qubits  [PDF]
Xin Li, Huangfu Xu, Xuezhong Guan
Open Journal of Optimization (OJOp) , 2015, DOI: 10.4236/ojop.2015.42003
Abstract: To enhance the optimization ability of particle swarm algorithm, a novel quantum-inspired particle swarm optimization algorithm is proposed. In this method, the particles are encoded by the probability amplitudes of the basic states of the multi-qubits system. The rotation angles of multi-qubits are determined based on the local optimum particle and the global optimal particle, and the multi-qubits rotation gates are employed to update the particles. At each of iteration, updating any qubit can lead to updating all probability amplitudes of the corresponding particle. The experimental results of some benchmark functions optimization show that, although its single step iteration consumes long time, the optimization ability of the proposed method is significantly higher than other similar algorithms.
The Characteristics of the Evaporator/Evaporator for Direct Expansion Solar Assisted Heat Pump System  [PDF]
Mingyan Zhu, Huanrong Xie, Biao Zhang, Xin Guan
Journal of Power and Energy Engineering (JPEE) , 2013, DOI: 10.4236/jpee.2013.15012

Direct expansion solar assisted heat pump (DX-SAHP) technology is developed by combining solar energy heat utilization with heat pump energy saving technology. The experimental researches of the DX-SAHP hot water system are conducted in this paper, and overall performance of DX-SAHP is analyzed with three different structures of collectors/evaporators, namely a bare-plate collector, a glass-plate collector and double collectors/evaporators (a bare-plate collector and a glass-plate collector). The influence factors and overall performance are studied, which show that the overall performance of the system is mainly influenced by solar irradiation intensity and the collector area. Comparing with glass-plate collector in similar conditions, bare-plate collector system COP is higher. While increasing collector area is conducive to improve the system COP, but will reduce the collector efficiency and increase the workload of the compressor by comparing the bare-plate collector with double-plate collectors.

A Game Theory-Based Obstacle Avoidance Routing Protocol for Wireless Sensor Networks
Xin Guan,Huayang Wu,Shujun Bi
Sensors , 2011, DOI: 10.3390/s111009327
Abstract: The obstacle avoidance problem in geographic forwarding is an important issue for location-based routing in wireless sensor networks. The presence of an obstacle leads to several geographic routing problems such as excessive energy consumption and data congestion. Obstacles are hard to avoid in realistic environments. To bypass obstacles, most routing protocols tend to forward packets along the obstacle boundaries. This leads to a situation where the nodes at the boundaries exhaust their energy rapidly and the obstacle area is diffused. In this paper, we introduce a novel routing algorithm to solve the obstacle problem in wireless sensor networks based on a game-theory model. Our algorithm forms a concave region that cannot forward packets to achieve the aim of improving the transmission success rate and decreasing packet transmission delays. We consider the residual energy, out-degree and forwarding angle to determine the forwarding probability and payoff function of forwarding candidates. This achieves the aim of load balance and reduces network energy consumption. Simulation results show that based on the average delivery delay, energy consumption and packet delivery ratio performances our protocol is superior to other traditional schemes.
A Network Coding Based Routing Protocol for Underwater Sensor Networks
Huayang Wu,Min Chen,Xin Guan
Sensors , 2012, DOI: 10.3390/s120404559
Abstract: Due to the particularities of the underwater environment, some negative factors will seriously interfere with data transmission rates, reliability of data communication, communication range, and network throughput and energy consumption of underwater sensor networks (UWSNs). Thus, full consideration of node energy savings, while maintaining a quick, correct and effective data transmission, extending the network life cycle are essential when routing protocols for underwater sensor networks are studied. In this paper, we have proposed a novel routing algorithm for UWSNs. To increase energy consumption efficiency and extend network lifetime, we propose a time-slot based routing algorithm (TSR).We designed a probability balanced mechanism and applied it to TSR. The theory of network coding is introduced to TSBR to meet the requirement of further reducing node energy consumption and extending network lifetime. Hence, time-slot based balanced network coding (TSBNC) comes into being. We evaluated the proposed time-slot based balancing routing algorithm and compared it with other classical underwater routing protocols. The simulation results show that the proposed protocol can reduce the probability of node conflicts, shorten the process of routing construction, balance energy consumption of each node and effectively prolong the network lifetime.
EEHCA: An Energy-Efficient Hierarchical Clustering Algorithm for Wireless Sensor Networks
Guan Xin,Wu HuaYang,Bi DeGang
Information Technology Journal , 2008,
Abstract: In this study, a hierarchical clustering algorithm for long-lived sensor network is proposed. EEHCA (an energy-efficient hierarchical clustering algorithm for wireless sensor networks) achieves a good performance in terms of lifetime by minimizing energy consumption for communication and balancing the energy load among all the nodes. EEHCA adopts a new method for cluster head election, which can avoid the frequent election of cluster head. In order to improve the performance of fault-tolerance, we introduce the concept of backup cluster head. Furthermore, when nodes finished the communication within their own clusters and the cluster heads have finished the data aggregation, the head clusters will transmit aggregated data to the sink node by a special multi-hop mode. Simulation results have shown that EEHCA has the better performance than LEACH (low energy adaptive clustering hierarchy) and HEED (Hybrid Energy-Efficient Distributed clustering) in terms of network lifetime.
On Appraisal Index System and Method of The Innovation Ability of Resource-based City
Youjun Li,Fengli Tang,Xin Guan
International Journal of Business and Management , 2009,
Abstract: This paper used a more effective appraisal method, proposed that innovation is the only way to the resource-based city transformation, and considered the innovation theory should be applied in the establishment of the appraisal index system of the resource-based city transformation, established a more rational appraisal index system on innovation ability of the resource-based city and elaborated the appraisal method. The paper aimed at reflecting the state of development and innovation ability of resource-based city by evaluating all indexes comprehensively, in order to strengthen the innovation power and realize economic growth and sustainable development of the resource-based city.
Role of Translationally Controlled Tumor Protein in Cancer Progression
Tim Hon Man Chan,Leilei Chen,Xin-Yuan Guan
Biochemistry Research International , 2012, DOI: 10.1155/2012/369384
Abstract: Translationally controlled tumor protein (TCTP) is a highly conserved and ubiquitously expressed protein in all eukaryotes—highlighting its important functions in the cell. Previous studies revealed that TCTP is implicated in many biological processes, including cell growth, tumor reversion, and induction of pluripotent stem cell. A recent study on the solution structure from fission yeast orthologue classifies TCTP under a family of small chaperone proteins. There is growing evidence in the literature that TCTP is a multifunctional protein and exerts its biological activity at the extracellular and intracellular levels. Although TCTP is not a tumor-specific protein, our research group, among several others, focused on the role(s) of TCTP in cancer progression. In this paper, we will summarize the current scientific knowledge of TCTP in different aspects, and the precise oncogenic mechanisms of TCTP will be discussed in detail.
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