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Search Results: 1 - 10 of 27224 matches for " Bo DING "
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SOMS: A Subway Operation and Maintenance System Based on Planned Maintenance Model with Train State  [PDF]
Jianlong Ding, Yong Qin, Limin Jia, Shiyou Zhu, Bo Yu
Journal of Intelligent Learning Systems and Applications (JILSA) , 2013, DOI: 10.4236/jilsa.2013.54021
Abstract: This paper aims to propose a modeling framework for subway operation and maintenance system (SOMS), which analyzes the train condition data based on both train sensor network data and basis train maintenance plan. The system is formulated into five function modules, and the research problem is to determine one auxiliary maintains plan, including the time allocation and frequency of maintenance. The case of Guangzhou metro is conducted to illustrate the applicability of SOMS, and the results reveal a number of interesting insights into subway maintenance system, i.e., the worksheet can reduce duplication of redundant maintenance work, the repair cost, and the damage caused by frequent disassembly.
A Modification of Sufficient Conditions to Ensure the Exact Conic Relaxation
Tao Ding,Bo Zeng,Rui Bo
Mathematics , 2015,
Abstract: To solve the AC optimal power flow problem, it is proposed in [1,2] that a convex conic approximation to branch flow model (BFM) can be obtained if we first eliminate phase angles of voltages and currents and then relax a set of equality constraints to second order conic ones. In particular, provided a set of sufficient conditions are satisfied, the conic relaxation is exact. We note, however, that those conditions do not always guarantee the exactness. In this letter, we analyze the argument of exactness and include a new condition that there is no line with negative reactance to ensure the conic formulation's exactness.
Comparison of Laparoscopy-Assisted Gastrectomy and Conventional Open Gastrectomy with the Same Procedure in Early Distal Gastric Cancer  [PDF]
Li-Bo Sun, Zhen-Bo Shu, Yun-Xin Zhang, Da-Yong Ding, Yong-Chao Li
Journal of Cancer Therapy (JCT) , 2013, DOI: 10.4236/jct.2013.41A001
Abstract: Introduction: Laparoscopy-assisted gastrectomy (LAG) for early gastric cancer (EGC) was considered as a treatment with many advantages due to the application of laparoscopic equipment. The aim of this study was to compare the effect of use of laparoscopic equipment in blood loss, the number of harvested lymph nodes (HLNs), and complications between LAG and open gastrectomy (OG) for EGC. Methods: Patients received surgical treatment for early distal gastric cancer (EDGC) were retrospectively reviewed. Patients were classified into three groups by different operation methods: traditional open distal gastrectomy (ODG) group, laparoscopy-assisted distal gastrectomy (LADG) group, and open distal gastrectomy with assistance of laparoscopic equipment (ODGA) group. Results: Altogether 65 patients with EDGC received surgical treatment, including 20 cases of ODG, 22 of LADG, and 23 of ODGA. No lymph node metastasis was found in all patients. 25 (38.5%) postoperative confirmed T2 were misdiagnosed as T1 preoperatively. Compared with ODG group, the blood loss was significantly reduced in LADG and ODGA groups (106.4 ± 46.0; and 73.3 ± 35.7 ml vs. 250.5 ± 65.1 ml respectively; P < 0.01), but the operation time was significantly longer in these groups (231.0 ± 34.5, and 222.5 ± 42.6 min vs. 128.5 ± 22.3 min respectively; P < 0.01). No difference was found in the blood loss, operation time, the number of harvested lymph nodes and the types of gastrointestinal continuity reconstruction between LADG and ODGA groups. No difference was found in the postoperative complications among the three groups. Conclusions: Laparoscopic equipment might be the key factor in the reduction of blood loss and the delay of operation time for LADG. Application of laparoscopic equipment in open gastrectomy can be used as a training method to shorten learning curve for LAG beginners.

Policy Based Self-Adaptive Scheme in Pervasive Computing  [PDF]
Jian Quan OUYANG, Dian Xi SHI, Bo DING, Jin FENG, Huai Min WANG
Wireless Sensor Network (WSN) , 2009, DOI: 10.4236/wsn.2009.11008
Abstract: Nowadays, application systems in pervasive computing have to be self-adaptive, which means adapting themselves to dynamic environments. Our aim is to enable systematic development of self-adaptive compo-nent-based applications. The paper first introduces a novel policy based framework for self-adaptive scheme in pervasive computing. Then the proposed policy ontology and policy language are well expressive and eas-ily extensible to support the design of policy which is based on the Separation of Concerns principle. Fur-thermore, the context-driven event channel decouples the communication between the suppliers and con-sumers for asynchronous communication. The proposed framework can provide both a domain-independent and a flexible self-adaptation solution.
Exploring diversity of different classificatory human tandem repeats  [PDF]
Zhong-Yu Liu, Xu-Feng Li, Xian-Ping Ding, Bo Liu, Yi Yang
Journal of Biomedical Science and Engineering (JBiSE) , 2008, DOI: 10.4236/jbise.2008.12021
Abstract: Tandem repeats (TRs) are associated with dis-ease genes, play an important role in evolution and are important in genomic organization and function. Much research has been done on de-scriptions of properties of tandem repeats, such as copy-number, period, etc, and correlation be-tween mutations within tandem repeats and dis-ease. This project aims to detect some differ-ences which may exist within the features of dif-ferent tandem repeats associated with disease in human whole-genome. The features of tandem repeats associated with diabetes genes were compared to the counterparts of non-diabetes disease genes.
Ontology-based Semantic Interoperability among Heterogeneous CAD Systems
Li-juan Sun,Bo Ding
Information Technology Journal , 2010,
Abstract: Because the different CAD systems use different concepts, attributes and relations to store data model, it is difficult to implement semantic interoperability among heterogeneous CAD systems. In this study, the Feature Command Ontology Model (FCOM) which is established, includes a number of Neutral Semantic Feature Commands (NSFCs) corresponding to the basic modeling operations of CAD systems. The FCOM which has explicit ontological semantics, provides the uniform representation of heterogeneous information and helps to shield the heterogeneity of data sources. Meanwhile, it is capable of dealing with modification and deletion operations besides common creation operations. Based on the FCOM, a synchronized collaborative design platform upon heterogeneous CAD systems is built; the real-time data exchange among heterogeneous CAD systems is achieved in a semantic way.
Secure Communication System Based on Alterable-Parameter 4-Weighted Fractional Fourier Transform
Bo Ding,Lin Mei,Xuejun Sha
Information Technology Journal , 2010,
Abstract: By discussing the development of 4-WFRFT, a discrete sequence algorithm for 4-WFRFT based on DFT is introduced and this makes it possible to use 4-WFRFT in a discrete time system. On the basis of analyzing the rotating, squeezing effect to the digital signal constellation by 4-WFRFT process also the similarity of 4-WFRFT signal to Gaussian distribution and the anti-scanning competence of 4-WFRFT signal, an alterable-parameter secure communication system is introduced based on 4-WFRFT secure communication system. Moreover, in the light of frequency-hopping patterns, a dynamic alterable-parameter strategy for single parameter 4-WFRFT and three strategies for multi-parameters 4-WFRFT are designed to avoid a non-receiver’s intercepting and decoding. "Tracking coefficient" is defined to judge the anti-scanning capacity. The results of simulation show that the alterable-parameter 4-WFRFT secure communication system has strong practical significance.
Ontology-Based Model for Software Resources Interoperability
Bo Ding,Li-juan Sun
Information Technology Journal , 2009,
Abstract: In this study, we propose an ontology-based framework to provide an integrated view, which could integrate various software resources and realize semantic interoperability between different software resources. Ontologies are divided into shared ontology and domain ontology. The design of shared ontology is described in detail. The shared ontology which has explicit ontological semantics, implements the uniform representation of heterogeneous information and helps to shield the heterogeneity of software resources systematically. The domain ontology is a domain-specific functional design ontology repository, in which, the invoking functions of the specific platform is encapsulated. The Collaborative Functional Design Environment (CFDE) is built through the shared ontology and the domain ontology. The CFDE facilitates the semantic interoperability among diverse software resources, which provides more software resources and better service to users.
Land Use and Land Cover Change in Northeast Gadarif State: Case of El Rawashda Forest, Sudan  [PDF]
Yousif Elnour Yagoub, Zhang Bo, Ji Ding-min, Abdelraheim Elobeid Jahelnabi, Sona Mohammed Fadoul
Journal of Geographic Information System (JGIS) , 2015, DOI: 10.4236/jgis.2015.72013
Abstract: The main objectives of this study were to detecting the land use and land cover change (LULC), using remote sensing techniques, then identify the reasons for rangeland and tree cover degradation in El Rawashda Forest, Gadarif State, Sudan. The study has conducted field experiment developed on an area of 20 feddans that was affected by deterioration in the forest and to assess the best method for rehabilitation of the vegetation cover in the area of study. The experimental area was divided into 5 blocks; each block consisted of 4 treatments: grass seeds and Talih (Acacia seyal var. seyal); sowing seeds just before autumn, sowing seeds after disc ploughing, sowing seeds using water harvesting technique and control (no seeding). In the present study an attempt has been made to analyze and monitor the LULC changes using multitemporal Landsat data deterioration in the forest and to assess the best method for restoration of the vegetation. In the present study, an attempt has been made to analyze and monitor the LULC changes using multitemporal Landsat data for years 1984, 1994 and 2013. LULC grades in the classification scheme are: Trees, Mechanized Rain-fed Agriculture (MRA), Grasses and Bare land. Individual classifications based on maximum likelihood of algorithm were used and the results showed a significant that extensive change of LULC patterns has occurred in all decades in the study area. The results also show Trees class was decreased, while MRA, Grasses and Bare land were increased. The seeding of the forage and Talih seeds after disc plowing gave the best results compared to the other treatments, followed by forage and Talih seed sowing under the water harvesting technique and broadcasting of forage and Talih seeds and finally the control.
Contribution of asymmetric strange-antistrange sea to the Paschos-Wolfenstein relation
Yong Ding,Bo-Qiang Ma
Physics , 2004, DOI: 10.1016/j.physletb.2004.04.008
Abstract: The NuTeV Collaboration reported a value of $\sin^{2}\theta_{w}$ measured in neutrino-nucleon deep inelastic scattering, and found that the value is three standard deviations from the standard model prediction. This result is obtained under the assumption that the strange-antistrange sea quarks of nucleons are symmetric, and that the up and down quark distributions are symmetric with the simultaneous interchange of $u$$\leftrightarrow$$d$ and $p$$\leftrightarrow$$n$. We discuss the contribution of asymmetric strange-antistrange sea to the Paschos-Wolfenstein relation in the extraction of weak mixing angle $\sin^{2}\theta_{w}$. We also point out that the contribution of asymmetric strange-antistrange sea should remove roughly 30--80% of the discrepancy between the NuTeV result and other determinations of $\sin^{2}\theta_{w}$, when using the light-cone meson-baryon model to calculate the contribution of the strange-antistrange sea.
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