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1 – 10 of 17Xiufeng Cheng, Jinqing Yang and Lixin Xia
This paper aims to propose an extensible, service-oriented framework for context-aware data acquisition, description, interpretation and reasoning, which facilitates the…
Abstract
Purpose
This paper aims to propose an extensible, service-oriented framework for context-aware data acquisition, description, interpretation and reasoning, which facilitates the development of mobile applications that provide a context-awareness service.
Design/methodology/approach
First, the authors propose the context data reasoning framework (CDRFM) for generating service-oriented contextual information. Then they used this framework to composite mobile sensor data into low-level contextual information. Finally, the authors exploited some high-level contextual information that can be inferred from the formatted low-level contextual information using particular inference rules.
Findings
The authors take “user behavior patterns” as an exemplary context information generation schema in their experimental study. The results reveal that the optimization of service can be guided by the implicit, high-level context information inside user behavior logs. They also prove the validity of the authors’ framework.
Research limitations/implications
Further research will add more variety of sensor data. Furthermore, to validate the effectiveness of our framework, more reasoning rules need to be performed. Therefore, the authors may implement more algorithms in the framework to acquire more comprehensive context information.
Practical implications
CDRFM expands the context-awareness framework of previous research and unifies the procedures of acquiring, describing, modeling, reasoning and discovering implicit context information for mobile service providers.
Social implications
Support the service-oriented context-awareness function in application design and related development in commercial mobile software industry.
Originality/value
Extant researches on context awareness rarely considered the generation contextual information for service providers. The CDRFM can be used to generate valuable contextual information by implementing more reasoning rules.
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Lixin Xia, Zhongyi Wang, Chen Chen and Shanshan Zhai
Opinion mining (OM), also known as “sentiment classification”, which aims to discover common patterns of user opinions from their textual statements automatically or…
Abstract
Purpose
Opinion mining (OM), also known as “sentiment classification”, which aims to discover common patterns of user opinions from their textual statements automatically or semi-automatically, is not only useful for customers, but also for manufacturers. However, because of the complexity of natural language, there are still some problems, such as domain dependence of sentiment words, extraction of implicit features and others. The purpose of this paper is to propose an OM method based on topic maps to solve these problems.
Design/methodology/approach
Domain-specific knowledge is key to solve problems in feature-based OM. On the one hand, topic maps, as an ontology framework, are composed of topics, associations, occurrences and scopes, and can represent a class of knowledge representation schemes. On the other hand, compared with ontology, topic maps have many advantages. Thus, it is better to integrate domain-specific knowledge into OM based on topic maps. This method can make full use of the semantic relationships among feature words and sentiment words.
Findings
In feature-level OM, most of the existing research associate product features and opinions by their explicit co-occurrence, or use syntax parsing to judge the modification relationship between opinion words and product features within a review unit. They are mostly based on the structure of language units without considering domain knowledge. Only few methods based on ontology incorporate domain knowledge into feature-based OM, but they only use the “is-a” relation between concepts. Therefore, this paper proposes feature-based OM using topic maps. The experimental results revealed that this method can improve the accuracy of the OM. The findings of this study not only advance the state of OM research but also shed light on future research directions.
Research limitations/implications
To demonstrate the “feature-based OM using topic maps” applications, this work implements a prototype that helps users to find their new washing machines.
Originality/value
This paper presents a new method of feature-based OM using topic maps, which can integrate domain-specific knowledge into feature-based OM effectively. This method can improve the accuracy of the OM greatly. The proposed method can be applied across various application domains, such as e-commerce and e-government.
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Feifei Wang, Tina J. Jayroe, Junping Qiu and Houqiang Yu
The purpose of this paper is to further explore the co-citation and bibliographic-coupling relationship among the core authors in the field of Chinese information science (IS), to…
Abstract
Purpose
The purpose of this paper is to further explore the co-citation and bibliographic-coupling relationship among the core authors in the field of Chinese information science (IS), to expose research activity and author impact, and to make induction analyses about Chinese IS research patterns and theme evolution.
Design/methodology/approach
The research data include 8,567 papers and 70,947 cited articles in the IS field indexed by Chinese Social Sciences Citation Index from 2000 to 2009. Author co-citation analysis, author bibliographic-coupling analysis, social network analysis, and factor analysis were combined to explore co-citation and bibliographic-coupling relationships and to identify research groups and subjects.
Findings
Scholars with greatest impact are different from the most active scholars of Chinese IS; there is no uniform impact pattern forming since authors’ impact subjects are scattered and not steady; while authors’ research activities present higher independence and concentration, there is still no steady research pattern due to no deep research existing. Furthermore, Chinese IS studies can be delineated by: foundation or extension. The research subjects of these two parts, as well as their corresponding/contributing authors, are different under different views. The general research status of core authors is concentrated, while their impact is broad.
Originality/value
The combined use of some related methods could enrich the development and methodology research of the discipline, and the results establish a reference point on the development of IS research.
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Qiang Wang, Hongliang Zhang, Da Quan Zhang, Hongai Zheng and Lixin Gao
The purpose of this paper is to study the effect of vapor assembly sequence and assembly temperature on the corrosion protection of the complex silane films Al alloy. The…
Abstract
Purpose
The purpose of this paper is to study the effect of vapor assembly sequence and assembly temperature on the corrosion protection of the complex silane films Al alloy. The performance and application range of silane films are enhanced.
Design/methodology/approach
The complex silane films were successfully prepared on the surface of aluminum alloy using via vapor phase assembly of 1,2,3-benzotriazole (BTA) and dodecyltrimethoxysilanes (DTMS). The protection of the assembly films against corrosion of Al alloy is investigated by the electrochemical measurements and the alkaline solution accelerated corrosion test. Thickness and hydrophobicity of the complex films are studied using ellipsometric spectroscopy and contact angle tests.
Findings
It shows that the anti-corrosion ability of the complex films is overall superior to that of the single-component assembled films. DTMS-BTA films have larger thickness and best anti-corrosion ability. The alkyl chains in DTMS have better compatibility with BTA molecules. The rigid BTA molecule can permeate into the long alkyl chain of DTMS as fillers and improve the barrier properties of the complex films.
Originality/value
In this paper, a green and efficient method of vapor phase assembly is proposed to rust prevention during manufacture of Al alloy workpiece.
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Jing Liu, Yuchen An, Wanli Fancheng, Changke Tang and Lixin Xu
Bearing friction moments are important factors that affect the vibrations of rotor systems. The bearing friction moments are related to the dimension parameters, lubrication…
Abstract
Purpose
Bearing friction moments are important factors that affect the vibrations of rotor systems. The bearing friction moments are related to the dimension parameters, lubrication conditions and manufacturing errors of support bearings. This work studies the effects of the bearing friction moments on the vibrations of rotor systems.
Design/methodology/approach
The rotor is separated into several shaft elements for formulating a flexible rotor. The time-varying friction moment (TFM) is affected by the time-varying contact loads. The vibrations of FRS from the TFM and Palmgren's friction moment (PFM) calculation methods are compared. Moreover, the effects of the rotor offset and radial clearance on the frequency-amplitude characteristics of FRS are studied.
Findings
The TFM method is more consistent with the actual operation mechanisms. The rotor offset and radial clearance can significantly affect the nonlinear vibrations of FRS. This work provides a new reference and research method for the vibration analysis of rotor systems considering the friction effects.
Originality/value
The elastohydrodynamic lubrication (EHL), elastic hysteresis and differential sliding are considered. A flexible rotor system (FRS) dynamic model considering the TFM is proposed. The vibrations of FRS from the TFM calculation method and empirical calculation formula are compared. The effects of the rotor offset and radial clearance on the frequency–amplitude characteristics of FRS are studied.
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Yaoqi Li, Lixin Peng, Shuang Ma and Xiaoman Zhou
Limited research has paid attention to the physical attractiveness stereotype in peer-to-peer sharing accommodation settings. Since the high-risk situations in sharing…
Abstract
Purpose
Limited research has paid attention to the physical attractiveness stereotype in peer-to-peer sharing accommodation settings. Since the high-risk situations in sharing accommodations, this paper aims to exam whether beauty premium is still relevant in peer-to-peer (P2P) accommodation.
Design/methodology/approach
The mixed method, including 2,506 secondary data analysis and two scenario experiments, is carried out to test the research framework.
Findings
The results show that both beauty premium and beauty penalty exist in the e-commerce context. Excessively high attractiveness and plain looking of hosts are likely to decrease consumers’ booking decision while moderately attractive hosts will stimulate more booking behaviors. Moreover, perceived trustworthiness mediates the effect of physical attractiveness on booking decision. Additionally, similarity between hosts and consumers plays a moderating role in the relationship between physical attractiveness and perceived trustworthiness.
Research limitations/implications
This study reveals the physical attractiveness stereotype effects in P2P accommodation and carry implications to P2P platforms and hosts for providing moderately attractive profile photos, enhancing trustworthiness and similarity between hosts and consumers. Further studies can investigate the robustness of the findings as well as more possible reasons for its occurrence.
Originality/value
The research provides a clearer understanding of physical attractiveness stereotype effect in peer-to-peer sharing accommodation platforms. Besides, the linkage between physical attractiveness and perceived trustworthiness is dynamic; a high host – consumer similarity weakens the negative impact of both excessively high attractiveness and plain looking on consumers’ perceived trustworthiness.
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Xingtong Fang, Kaigang He, Yijun Meng and Jianfang Ye
Social ties may either help chief executive officers (CEOs) supervise chief financial officers' (CFOs) behaviors effectively and improve financial reporting quality or lead to…
Abstract
Purpose
Social ties may either help chief executive officers (CEOs) supervise chief financial officers' (CFOs) behaviors effectively and improve financial reporting quality or lead to collusion and undermine financial reporting quality. Therefore, this paper examines the impact of social ties between CEOs and CFOs on financial reporting quality.
Design/methodology/approach
This paper constructs the CEO–CFO social ties through their mutual alma mater or birthplace. Based on 6,787 Chinese non-financial firm-year observations from 2003 to 2020, the paper conducts an empirical test using the multiple regression method.
Findings
The main finding is that firms with CEO–CFO social ties are more likely to exhibit higher financial reporting quality. CEOs with social ties to CFOs can obtain a high level of information and exert a better supervisory and monitoring role. Further, CEO–CFO social ties are more effective when the CEO does not have a financial background and when the institutional environment is weak.
Originality/value
This paper mainly contributes to the literature exploring the impact of executive characteristics on financial reporting quality and the literature examining the relation between social ties and corporate behaviors. Meanwhile, the paper emphasizes the important role of social ties as an informal monitoring mechanism in practice.
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Jiangtao Hong, Chenlin Zhan and Kwok Hung Lau
This paper aims to explore the use of joint distribution to reduce environmental cost of express delivery in urban logistics.
Abstract
Purpose
This paper aims to explore the use of joint distribution to reduce environmental cost of express delivery in urban logistics.
Design/methodology/approach
An optimization model was developed to help design the joint distribution network. A real case in Songjiang University Town of Shanghai, China, was used to explore empirically the potential benefit of the design. Performance of the proposed joint distribution was compared with that of the current distribution design using separate deliveries.
Findings
The findings show that, using joint distribution in express delivery, a significant saving in economic cost (up to a reduction of 25%) and environmental cost (up to a reduction of 87%) can be achieved.
Research limitations/implications
This study provides a reference for joint distribution network design for last-mile delivery in urban logistics.
Practical implications
Express delivery companies can explore the use of joint distribution to reduce operating cost and increase distribution efficiency of the industry.
Social implications
Joint distribution can facilitate maximization of vehicle utilization and reduction of delivery trips. This will help reduce fuel consumption, carbon emission, as well as other externalities, such as noise and traffic congestion.
Originality/value
Research in joint distribution to date focuses mainly on reduction in operating cost only. Consideration of environmental impact is relatively limited. This paper fills the gap in the literature by using a real case to illustrate the significant benefit of joint distribution in reducing the negative impact of urban logistics on the environment.
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Xin Zhou, Wenbin Zhou, Yang Zheng Zhang, Meng-Ran Li, Haijing Sun and Jie Sun
This paper aims to study the corrosion inhibition behavior of imidazopyridine and its three derivatives on brass.
Abstract
Purpose
This paper aims to study the corrosion inhibition behavior of imidazopyridine and its three derivatives on brass.
Design/methodology/approach
The authors performed weight loss experiments, electrochemical experiments including the polarization curve and electrochemical impedance spectrum, corrosion morphology observation using scanning electron microscope (SEM) and atomic force microscope (AFM) and surface composition analysis via X-ray photoelectron spectroscopy (XPS) to analyze the corrosion inhibition behavior of imidazopyridine and its three derivatives on brass by using quantum chemical calculation (Gaussian 09), molecular dynamics simulation (M-S) and Langmuir adsorption isotherm.
Findings
According to the results, imidazole-pyridine and its derivatives were found to be modest or moderately mixed corrosion inhibitors; moreover, they were spontaneously adsorbed on the metal surface in a single-layer, mixed adsorption mode.
Originality/value
The corrosion inhibition properties of pyrazolo-[1,2-a]pyridine and its derivatives on brass in sulfuric acid solution were analyzed through weight loss and electrochemical experiments. Moreover, SEM and AFM were simultaneously used to observe the corrosion appearance. Furthermore, XPS was used to analyze the surface. Then, Gaussian 09 and M-S were combined along with the Langmuir adsorption isotherm to investigate the corrosion inhibition mechanism of imidazole-[1,2-a]pyridine and its derivatives.
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Suwen Zhang, Cuiping Zhu and Juan Chen
The purpose of this paper is to overcome the shortcomings of the marked method in identifying the number of regions in binary images, and to present a new algorithm to identify…
Abstract
Purpose
The purpose of this paper is to overcome the shortcomings of the marked method in identifying the number of regions in binary images, and to present a new algorithm to identify the number of bars.
Design/methodology/approach
Identifying the number of bars automatically is widely used in the lumbering, iron, and steel industry. The marked methods need complex signing and have to scan the binary image several times. An algorithm that uses two chain lists to identify the number of bars is presented. It uses the characteristic of the chain list. When scanning the binary image, it creates two chain lists and then the number and the central position of the bar based on the relations of created chain lists can be determined.
Findings
Test results have indicated this algorithm is feasible and effective on recognizing the number of bars.
Research limitations/implications
When the connected area has too many pixels in the binary images, recognizing its number needs much more time.
Originality/value
The paper presents a very useful approach for identifying the number of the bar, in the lumbering and steel industry.
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