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Search Results: 1 - 10 of 104006 matches for " Zhang Liyi "
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A Shopping Model in Agent-mediated Electronic Commerce
Ziming Zeng,Liyi Zhang
International Journal of Business and Management , 2009, DOI: 10.5539/ijbm.v3n3p11
Abstract: As the development of Internet, electronic commerce technology in which agent takes the role of medium is becoming more and more popular recently. It accentuates how to make use of agent technology to enhance the automation and efficiency of shopping in the Internet and businessman’s selling process. However, today’s first generation shopping agent systems are limited to comparing product usually on price instead of their full range of attribute and don’t reflect the customer’s actual purchase preference. For these limitations, we propose a new shopping model for electronic commerce based on the agent technology and elaborate how to analyze and design the agent system. Based on the agent technology, the combination of a multi-attribute evaluation model and preference evaluation model is presented. Finally, an experimental prototype system for car shopping on IBM’s Aglets is developed for demonstrating the proposed shopping model above.
Effects of Drought Stress Simulated by Polyethylene Glycol on Seed Germination, Root and Seedling Growth, and Seedling Antioxidant Characteristics in Job’s Tears  [PDF]
Can Wang, Lingbo Zhou, Guobing Zhang, Yan Xu, Xu Gao, Ne Jiang, Liyi Zhang, Mingbo Shao
Agricultural Sciences (AS) , 2018, DOI: 10.4236/as.2018.98069
Abstract: Two Job’s tears cultivars, yy18-1 (high resistance to drought stress) and yy12-7 (susceptible to drought stress) were used to investigate the responses of seed germination, root and seedling growth, and seedling antioxidant characteristics to drought stress simulated by polyethylene glycol (PEG) 6000 solutions with 0, -0.05, -0.1, -0.15, and -0.2 MPa osmotic potentials. The results showed that the germination energy, germination rate, germination index, root and seedling lengths, root and seedling diameters, root and seedling fresh masses, root and seedling dry masses, and seedling relative water content (RWC) decreased with the decrease of the osmotic potential of PEG 6000 solution. The contents of hydrogen peroxide (H2O2), malondialdehyde (MDA), and proline in seedling increased with the decrease of the osmotic potential of PEG 6000 solution. The activities of peroxidase (POD), catalase (CAT), ascorbate peroxidase (APX), and glutathione reductase (GR) in seedling increased and then decreased with the decrease of osmotic potential of PEG 6000 solution. -0.1 MPa was the optimal osmotic potential of PEG 6000 solution simulated drought stress at germination stage for Job’s tears. The proline content and activities of POD and CAT were important mechanisms for the maintenance of drought resistance in Job’s tears seedling.
A Framework for an Ontology-based E-commerce Product Information Retrieval System
Liyi Zhang,Mingzhu Zhu,Wei Huang
Journal of Computers , 2009, DOI: 10.4304/jcp.4.6.436-443
Abstract: With the rapid development of e-commerce, online shopping has become an important part in people's lives, in order to support the smooth development of e-commerce activities, how to provide users with an efficient and practical product information search method has become an urgent and critical problem. This paper presents a framework for an ontology-based e-commerce product information retrieval system and proposes an ontology-based adaptation of the classical Vector Space Model with the consideration of the weight of product attribute. A computer and components related ontology has been built, which is adopted to annotate the html documents and construct concept vectors of the documents. Then the system test is done and the experimental result indicates that our proposal is better than the traditional keywords based search.
A Mediator-Based Approach for Process Mediation of Web Services
Liyi Zhang,Si Zhou,Zhefeng Sun
Journal of Software , 2010, DOI: 10.4304/jsw.5.8.915-922
Abstract: Although several efforts were made to support the standardization of Web Services (such as WSDL, UDDI, SOAP, BPEL, etc.), they are not always perfectly compatible to each other due to the distributed nature. Both data and process heterogeneity required and offered by services’ requesters and providers hamper the usability of Web services, thus service mediation becomes one key working area in SOA. While the former has received considerable attention, process mediation is still open and current approaches provide only partial solutions. In this paper, a mediator-based approach for process mediation of web services is proposed to adjust the partially compatible messages interchange behaviors to suit the requested/expected interface of each party. Based on the identification of message exchanging sequences in service interactions, several basic process mismatch patterns are presented to develop basic mediator patterns, which can be used to modularly construct advanced mediators that can resolve all possible process mismatches.
Ubiquitous Commerce: Theories, Technologies, and Applications
Liyi Zhang,Qihua Liu,Xinjian Li
Journal of Networks , 2009, DOI: 10.4304/jnw.4.4.271-278
Abstract: With the rapid development of ubiquitous computing and mobile communication technologies, the traditional business model will change drastically. As a logical extension of e-commerce and m-commerce, ubiquitous commerce (u-commerce) research and application are currently under transition with a history of numerous tried and failed solutions, and a future of promising but yet uncertain possibilities with potential new technology innovations. At this point of the development, we propose a suitable framework and organize the u-commerce research under the proposed classification scheme. The current situation outlined by the scheme has been addressed by exploratory and early phase studies. We hope the findings of this research will provide useful insights for anyone who is interested in u-commerce. The paper also provides some future directions for research.
A New Cross-Language Commodity Information Retrieval Approach in Book Searching
一种新的跨语言商品信息检索方法在图书搜索中的应用*

Zhang Liyi Zhang Zhenyun,
张李义
,张震云

现代图书情报技术 , 2010,
Abstract: This paper analyzes the basic model of Cross-Language Information Retrieval(CLIR)and the techniques of translation disambiguation.Then it optimizes translation disambiguation based on co-occurrences between pairs of terms and computing weights of terms,and constructs a CLIR system for book searching.The experiments show that the translation quality and the retrieval effectiveness are improved.
Neural Network Blind Equalization Algorithm Applied in Medical CT Image Restoration
Yunshan Sun,Liyi Zhang,Jin Zhang,Lijuan Shi
Mathematical Problems in Engineering , 2013, DOI: 10.1155/2013/743546
Abstract:
Semantic Focused Crawling for Retrieving E-Commerce Information
Wei Huang,Liyi Zhang,Jidong Zhang,Mingzhu Zhu
Journal of Software , 2009, DOI: 10.4304/jsw.4.5.436-443
Abstract: Focused crawling is proposed to selectively seek out pages that are relevant to a predefined set of topics without downloading all pages of the Web. With the rapid growth of the E-commerce, how to discovery the specific information such as about buyer, seller and products etc. adapting for the online business user becomes a focused issue to the information search engine. We present a novel semantic approach for building an intelligent focused crawler which deals with evaluating the page’s content relevance to the E-commerce topic by the domain ontology and the hyperlinks connection to the commercial web pages by link analysis. In the process of crawling, the domain ontology can evolve automatically by machine learning based on the statistics and rules. Experiments have been performed, and the results show that our approach is more effective than the other traditional crawling algorithms, and prevents the topic-drift with higher harvest rate.
Study on Genetype in Lung Squamous Carcinoma by High-throughput of ?Transcriptome Sequence
Ying XIONG, Mingzhen LI, Panpan ZHANG, Liyi ZHANG, Yue YANG
- , 2017, DOI: : 10.3779/j.issn.1009-3419.2017.11.01
Abstract: Background and objective Recently, there is no effective targeted drug for to the lung squamous carcinoma, the targeted drug for the adenocarcinoma does not benefit for the patients with squamous lung cancer, and researchers have known less targets for this type of patients. The main study herein is to screen and identify the specific key genes for the lung squamous carcinoma that will provide potential novel targets to describe pathogenesis of lung cancer. Methods Transcript sequence was used to detect the five pairs lung squamous carcinoma and normal lung tissues and bioinformatics was performed to investigate the differential coding genes between them and quantitative PCR was done to validate the key genes expression in lung cancer cell lines. Results The results of transcriptome sequence showed that 534 genes were up-regulated in the tumor tissues compared with the corresponding normal tissues. The top ten increased genes in the tumors were GAGE12J, SPRR3, PRAME, SPRR1A, SPRR2E, MAGEA3, SPRR1B, IL36G and TMPRSS11D. Next, we identified expression of SPRR family in lung cancer cell lines H520, GLC82, A549, H1299 and PC9. And we found higher expression of SPRR family genes in H1299 cells which metastasized to the lymph node. Conclusion SPRR family genes are identified to be highly expressed in the lung squamous carcinoma by high throughput transcript sequencing. This SPRR family genes are associated with lymph node metastasis that provide novel idea for lung cancer therapy.
Self-rated health of population in southern China: association with socio-demographic characteristics measured with multiple-item self-rated health measurement scale
Jun Xu, Jinhua Zhang, Liyi Feng, Jincai Qiu
BMC Public Health , 2010, DOI: 10.1186/1471-2458-10-393
Abstract: A cross-sectional survey was conducted in a total of 8400 community residents of 14 years old and over in Southern China. SRH status was measured using SRHMS with a stratified sampling approach, and compared between different subgroups with t-test and one-way analysis of variance (ANOVA).Totally 8400 subjects were recruited in this study and 80.96% (6801) responded to the survey. The mean score for SRHMS dimensions ranged from 66.16 ± 20.65 (mean ± sd) for positive emotion (M2) to 92.14 ± 14.06 for daily physical activities (B2). Results showed that SRHMS scores for women, elderly men, low education level, low income, divorced, separated or widowed and suburban residents in Southern China were significantly lower than other subgroups (P < 0.05).In this study, using SRHMS we assessed the association of SRH with socio-demographic characteristics including sex, age, marital status, education, and income in Southern China. The performance of the questionnaire in the large scale survey is satisfactory and provides a large picture of SRH status in Southern China. Our results indicate that women, elderly men, low education level, low income, divorced, separated or widowed and suburban residents in Southern China suffer from relatively poor SRH status.Based on the World Health Organization (WHO) definition, health is a state of complete physical, mental and social well-being and not merely the absence of disease or infirmity[1]. This definition has not been amended since 1948. Over the past decades, the Chinese have enjoyed a rapidly declining mortality rates and a long life expectancy at all ages[2,3]. Today the primary focus of medical care has shifted from infections diseases to chronic diseases[4,5]. However, over the past few years, we have observed an increase in health service attendance due to unspecific somatization condition and chronic diseases. People in China no longer consent to the absence of diseases and dysfunction. They are pursuing more comfortable life a
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