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Search Results: 1 - 10 of 148815 matches for " WANG Lin-lin "
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Research on the Risk Associated with Rural Drinking Water Safety Based on Catastrophe Theory  [PDF]
Chao Wang, Fu-Quan Ni, Yu Deng, Lin-Lin Jiang
Journal of Water Resource and Protection (JWARP) , 2011, DOI: 10.4236/jwarp.2011.36045
Abstract: In this study, based on the analysis of the catastrophic risk of rural drinking water, with the representative villages in Ya’an as study objects and setting the four evaluation standards: water quality, water quantity, the Guarantee Probability for water Supply and the Convenience Level of the Access to Water Supply as the ba- sic framework, a Rural Drinking Water Safety Assessment was developed (RDWSA). Research showed that Catastrophe Theory was applicable in the RDWSA. Adding RDWSA based on Catastrophe Theory to the supportive system for decision-making in Ecological Hydrographic Management Decision Support System of Ya’an helped obtain the rank and results of RDWSE by the automatic calculation of programs, which could assist the risk assessment and risk management associated with rural drinking water in Ya’an.
Ternary Tetradymite Compounds as Topological Insulators
Lin-Lin Wang,Duane D. Johnson
Physics , 2010, DOI: 10.1103/PhysRevB.83.241309
Abstract: Ternary tetradymites Bi2Te2S, Bi2Te2Se and Bi2Se2Te are found to be stable, bulk topological insulators via theory, showing band inversion between group V and VI pz orbitals. We identify Bi2Se2Te as a good candidate to study massive Dirac Fermions, with a (111) cleavage-surface-derived Dirac point (DP) isolated in the bulk band gap at the Fermi energy Ef like Bi2Se3 but with a spin texture alterable by layer chemistry. In contrast, Bi2Te2S and Bi2Te2Se (111) behave like Bi2Te3, with a DP below Ef buried in bulk bands. Bi2Te2S offers large bulk resistivity needed for devices.
A new perturbation method to the Tent map and its application

Wang Xing-Yuan,Wang Lin-Lin,

中国物理 B , 2011,
Abstract: Disturbance imposed on the chaotic systems is an effective way to maintain its chaotic good encryption features. This paper proposes a new perturbation method to the Tent map. First it divides the Tent map domain into 2^N parts evenly and selects a particular part from them, then proliferates the Tent map mapping trajectory of this particular part, which can disturb the entire system disturbance. The mathematical analysis and simulated experimental results prove that the disturbed Tent map has uniform invariant distribution and can produce good cryptographic properties of pseudo-random sequence. These facts avoid the phenomenon of short-period caused by the computer's finite precision and reducing the sequence's dependence on the disturbance signal, such that effectively compensate for the digital chaotic system dynamics degradation.
Permanence for a Discrete Model with Feedback Control and Delay
Yong-Hong Fan,Lin-Lin Wang
Discrete Dynamics in Nature and Society , 2008, DOI: 10.1155/2008/945109
Abstract: The permanence of a single-species population discrete model with feedback control is considered. We found that if we use the method of comparison theorem, then the additional condition, to some extent, is necessary. But for the system itself, this condition may not be necessary. Here, we use new methods instead of the comparison theorem to get the permanence of the system in consideration; the additional condition in Chen's paper (2007) is deleted.
Periodic solutions and stability for a delayed discrete ratio-dependent predator-prey system with Holling-type functional response
Lin-Lin Wang,Wan-Tong Li
Discrete Dynamics in Nature and Society , 2004, DOI: 10.1155/s1026022604310010
Abstract: The existence of positive periodic solutions for a delayed discrete predator-prey model with Holling-type-III functional response N1(k
On a Generalized Discrete Ratio-Dependent Predator-Prey System
Yong-Hong Fan,Lin-Lin Wang
Discrete Dynamics in Nature and Society , 2009, DOI: 10.1155/2009/653289
Abstract: Verifiable criteria are established for the permanence and existence of positive periodic solutions of a delayed discrete predator-prey model with monotonic functional response. It is shown that the conditions that ensure the permanence of this system are similar to those of its corresponding continuous system. And the investigations generalize some well-known results. In particular, a more acceptant method is given to study the bounded discrete systems rather than the comparison theorem.
Diagnostic significance of CTE and CE,SBFT,MRE in Crohn’s disease of small intestine
Lin-lin ZHU,Yi-ping WANG
Medical Journal of Chinese People's Liberation Army , 2011,
Abstract: Objective To evaluate the diagnostic accuracy of CTE,including computed tomography enteroclysis and computed tomography enterography,and other modalities such as capsule endoscope(CE),MR enterography(MRE) and SBFT in Crohn’s disease(CD).Methods Following PICO,related literature was fully retrieved from MEDLINE(1960-2010),PUBMED,EMBASE,CCTR and Cochrane Library combined with manual search.The prospective or retrospective studies which evaluated or compared the diagnostic accuracy of CTE and CE,SBFT,MRE were included.QUADAS items were used to evaluate the quality of the included studies.SEN,SPE,+LR,-LR and the areas under SROC were detected.Results Nine trials including 360 cases met the inclusion criteria.The reference standard included endoscopic,histological and radiological data,imaging methods(①) and ileocolonoscopy+biopsy or operative findings(②).There were four and five research projects conforming to these two reference standards ① and ②,respectively.SEN values were 0.77(95%CI: 0.69-0.84),0.86(95%CI:0.80-0.90);SPE values were 0.81(95%CI: 0.72-0.88),0.97(95%CI: 0.89-1.00);+LR values were 3.44(95%CI: 1.61-7.32),14.67(95%CI: 5.31-40.50);-LR values were 0.30(95%CI: 0.18-0.50),0.16(95%CI: 0.11-0.22).Areas under the SROC curve were 0.8762 and 0.8429,respectively.In CTE,the sensitivity plus specificity degrees were greatest,and the next was SBFT,followed by MRE,and CE was the last.Conclusion CTE is superior to all other modalities in the diagnosis of small bowel Crohn’s disease.
Grey Target Tracking and Self-Healing on Vehicular Sensor Networks
Yih-Fuh Wang,Lin-Lin Liu
EURASIP Journal on Wireless Communications and Networking , 2007, DOI: 10.1155/2007/63503
Abstract: The wireless vehicular sensor network (VSN) has been very useful for many transportation application systems, but it does not operate like the traditional wireless sensor network. For safety reason, the vehicle-vehicle and vehicle-gateway communication modes must be stable. The motion of the vehicle, the environment of the roads, and other uncertain traffic conditions all pose challenges to the system. Therefore, how to keep link stability becomes an important issue. In this paper, we propose a scheme that uses grey target tracking to self-heal or reroute in advance the weak link on an alternative route as failure occurs and makes the whole vehicular sensor network more stable. Although this scheme increases the average latency and control overhead, it supports higher survivability and effective reflections on rerouting.
Grey Target Tracking and Self-Healing on Vehicular Sensor Networks
Wang Yih-Fuh,Liu Lin-Lin
EURASIP Journal on Wireless Communications and Networking , 2007,
Abstract: The wireless vehicular sensor network (VSN) has been very useful for many transportation application systems, but it does not operate like the traditional wireless sensor network. For safety reason, the vehicle-vehicle and vehicle-gateway communication modes must be stable. The motion of the vehicle, the environment of the roads, and other uncertain traffic conditions all pose challenges to the system. Therefore, how to keep link stability becomes an important issue. In this paper, we propose a scheme that uses grey target tracking to self-heal or reroute in advance the weak link on an alternative route as failure occurs and makes the whole vehicular sensor network more stable. Although this scheme increases the average latency and control overhead, it supports higher survivability and effective reflections on rerouting.
An Empirical Study of Service Innovation’s Effect on Customers’ Re-purchase Intention in Telecommunication Industry
Ke-yi WANG,Lin-lin LIU
Canadian Social Science , 2010,
Abstract: Based on the review of the relevant researches in the field of repurchase intention as well as the field of service innovation, this research analyzed the Service Innovation’s Effect on Customers’ Re-purchase Intention in Telecommunication Industry, and developed the Theoretical model. And 198 users of mobile telecommunication were chosen for our investigation. The result shows that service innovation made by the operators in telecommunication industry has important effect to users’ intention when they are in need to repurchase the mobile telecommunication. Key words: service innovation; repurchase intention; telecommunication industry Résumé: Sur la base des études appropriées dans le domaine de l'intention de rachat, et dans le domaine de l'innovation des services, cette recherche a analysé l'effet de l'innovation des services sur l'intention de rachat des consommateurs dans l'industrie de télécommunication, et a développé un modèle théorique. 198 utilisateurs de télécommunication mobile ont été choisis pour notre enquête. Le résultat montre que l'innovation des services effectuées par les opérateurs dans l'industrie de télécommunication a un effet important sur l'intention des consommateurs quand ils sont dans le besoin de racheter la télécommunication mobile. Mots-clés: innovation des services, intention de rachat; industrie de télécommunication
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