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Open Access
Article
Publication date: 28 August 2019

Dongdong Ge, Luhui Hu, Bo Jiang, Guangjun Su and Xiaole Wu

The purpose of this paper is to achieve intelligent superstore site selection. Yonghui Superstores partnered with Cardinal Operations to incorporate a tremendous amount of…

2224

Abstract

Purpose

The purpose of this paper is to achieve intelligent superstore site selection. Yonghui Superstores partnered with Cardinal Operations to incorporate a tremendous amount of site-related information (e.g. points of interest, population density and features, distribution of competitors, transportation, commercial ecosystem, existing own-store network) into its store site optimization.

Design/methodology/approach

This paper showcases the integration of regression, optimization and machine learning approaches in site selection, which has proven practical and effective.

Findings

The result was the development of the “Yonghui Intelligent Site Selection System” that includes three modules: business district scoring, intelligent site engine and precision sales forecasting. The application of this system helps to significantly reduce the labor force required to visit and investigate all potential sites, circumvent the pitfalls associated with possibly biased experience or intuition-based decision making and achieve the same population coverage as competitors while needing only half the number of stores as its competitors.

Originality/value

To our knowledge, this project is among the first to integrate regression, optimization and machine learning approaches in site selection. There is innovation in optimization techniques.

Details

Modern Supply Chain Research and Applications, vol. 1 no. 1
Type: Research Article
ISSN: 2631-3871

Keywords

Article
Publication date: 4 October 2018

Yuqin Liu, Lanling Han, Bo Jiang and Xiaoyan Su

The aim of this paper is to solve the problem of lack of real context in JFL (Japanese as Foreign Language) classroom with video corpus-based teaching. It also offers reference…

Abstract

Purpose

The aim of this paper is to solve the problem of lack of real context in JFL (Japanese as Foreign Language) classroom with video corpus-based teaching. It also offers reference for the development of video corpus.

Design/methodology/approach

The authors designed an intelligent Japanese online video corpus, namely the JV Finder, which is a corpus of Japanese films and TV series. The authors applied the JV Finder to JFL teaching to solve the problem of lack of real context and designed several teaching experiments to validate its benefits.

Findings

The results of teaching experiments show that the video corpus-based teaching significantly improves the learning effect. The JV Finder can help students memorize vocabularies and understand the meaning of new vocabularies in a better way.

Research limitations/implications

There are still some differences in language context between real life and films, which cannot fully reflect the state of native speaker in real life. Meanwhile, the number of students participating in this experiment is relatively small, so the universality of the result need further study.

Practical implications

This study combined linguistics with software engineering to solve the problem of lack of real context. Video corpus-based teaching not only can be used in Japanese teaching field but also provide value for other foreign language teaching.

Social implications

The JV Finder has obtained Chinese national patent license (patent no. 20131118). The video corpus (the JV Finder) has a far-reaching impact on JFL teaching.

Originality/value

This paper provides an intelligent Japanese online video corpus. It is applied to JFL teaching to solve the problem of lack of real context. The findings show that the video corpus can significantly improve the effectiveness of Japanese learning.

Details

The Electronic Library, vol. 36 no. 4
Type: Research Article
ISSN: 0264-0473

Keywords

Open Access
Article
Publication date: 3 May 2022

Bo Jiang, Changhai Tian, Jiehang Deng and Zitong Zhu

This study aims to analyze the development direction of train speed, density and weight in China.

1961

Abstract

Purpose

This study aims to analyze the development direction of train speed, density and weight in China.

Design/methodology/approach

The development of China's railway in the past 40 years can be divided into 3 stages. At the stage of potential tapping and capacity expansion, it is important to improve the train weight and density by upgrading the existing lines, and improving transportation capacity rapidly. At the stage of railway speed increase, the first priority is to increase train speed, reduce the travel time of passenger train, and synchronously take into account the increase of train density and weight. At the stage of developing high-speed railway, train speed, density and weight are co-developing on demand.

Findings

The train speed of high-speed railway will be 400 km h−1, the interval time of train tracking will be 3 min, and the traffic density will be more than 190 pairs per day. The running speed of high-speed freight EMU will reach 200 km h−1 and above. The maximum speed of passenger train on mixed passenger and freight railway can reach 200 km h−1. The minimum interval time of train tracking can be compressed to 5 min. The freight train weight of 850 m series arrival-departure track railway can be increased to 4,500–5,000 t and that of 1,050 m series to 5,500–6,400 t. EMU trains should gradually replace ordinary passenger trains to improve the quality of railway passenger service. Small formation trains will operate more in intercity railway, suburban railway and short-distance passenger transportation.

Originality/value

The research can provide new connotations and requirements of railway train speed, density and weight in the new railway stage.

Details

Railway Sciences, vol. 1 no. 1
Type: Research Article
ISSN: 2755-0907

Keywords

Article
Publication date: 24 December 2020

Xuan Zhang, Jin-Bo Jiang, Xudong Peng and Jiyun Li

The purpose of this paper is to enhance sealing and rotordynamic performance of hole-pattern damping seal (HPDS) and labyrinth seal (LS) by structural innovation and geometrical…

Abstract

Purpose

The purpose of this paper is to enhance sealing and rotordynamic performance of hole-pattern damping seal (HPDS) and labyrinth seal (LS) by structural innovation and geometrical optimization of special-shaped hole or annular-groove cavity.

Design/methodology/approach

The unsteady flow was transformed into steady one using moving reference frame method. The full period numerical models of LS and HPDS were established. The influence of special-shaped hole or annular-groove cavity at axial inclined angle on leakage rate and rotordynamic coefficient of these two seals at different whirl angular speed were investigated.

Findings

The results show that dynamic characteristics of straight-tooth LS are better than that of slanted-tooth LS. Compared to typical straight-hole damping seal, HPDS with windward oblique-hole when axial inclined angle ranges from 50 to 60° has superiority in both leakage and rotordynamic characteristics by considering smaller cross-coupled stiffness coefficient and whirl frequency ratio, larger direct damping coefficient and effective damping coefficient.

Originality/value

A novel HPDS with special-shaped three-dimensional hole cavity was proposed to enhance leakage and rotordynamic performance. The optimized geometrical structures of HPDS for excellent sealing and rotordynamic characteristics were obtained.

Peer review

The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-07-2020-0262/

Details

Industrial Lubrication and Tribology, vol. 73 no. 2
Type: Research Article
ISSN: 0036-8792

Keywords

Article
Publication date: 15 November 2022

Chao Han, Li Ma, Bo Jiang Ma, Guosheng Huang and Ying Xiang Ma

This paper aims to verify weather atmospheric plasma spray (APS) in situ remelting posttreatment is effective for densifying the porous FeCoCrMoCBY amorphous alloy (FAA) coating…

Abstract

Purpose

This paper aims to verify weather atmospheric plasma spray (APS) in situ remelting posttreatment is effective for densifying the porous FeCoCrMoCBY amorphous alloy (FAA) coating and improving the antiabrasion and anticorrosion performances or not.

Design/methodology/approach

APS was used to deposit and in situ densify FAA coating on the 40Cr substrate. Scanning electron microscope, X-ray diffractometer, energy dispersive spectroscopy, neutral salt spray, hardness and wear behavior test were used to evaluate the densifying effects.

Findings

APS remelting technology can effectively improve the hardness of the coating by reducing the porosity. After remelting at 30 kW power, the hardness of the coating increased by about 260 HV0.2 and the porosity decreased to 2.78%. The amorphous content of the coating is 93.9%, which is about 3.5% lower than original powders. The electrochemical impedance spectrum and neutral salt spray test results show that APS remelting can reduce the corrosion rate by about 62.7%.

Originality/value

APS remelting method is firstly proposed in this work to replace laser remelting or laser cladding methods. APS remelting method can effectively improve the corrosion and abrasion resistance of the FAA coating by increasing the densification with much low recrystallization, which is big progress for application of FAA coatings.

Details

Anti-Corrosion Methods and Materials, vol. 70 no. 1
Type: Research Article
ISSN: 0003-5599

Keywords

Article
Publication date: 1 August 2016

Zhengping Chang, Zhongqi Wang, Bo Jiang, Jinming Zhang, Feiyan Guo and Yonggang Kang

Riveting deformation is inevitable because of local relatively large material flows and typical compliant parts assembly, which affect the final product dimensional quality and…

Abstract

Purpose

Riveting deformation is inevitable because of local relatively large material flows and typical compliant parts assembly, which affect the final product dimensional quality and fatigue durability. However, traditional approaches are concentrated on elastic assembly variation simulation and do not consider the impact of local plastic deformation. This paper aims to present a successive calculation model to study the riveting deformation where local deformation is taken into consideration.

Design/methodology/approach

Based on the material constitutive model and friction coefficient obtained by experiments, an accurate three-dimensional finite element model was built primarily using ABAQUS and was verified by experiments. A successive calculation model of predicting riveting deformation was implemented by the Python and Matlab and was solved by the ABAQUS. Finally, three configuration experiments were conducted to evaluate the effectiveness of the model.

Findings

The model predicting results, obtained from two simple coupons and a wing panel, showed that it was a good compliant with the experimental results, and the riveting sequences had a significant effect on the distribution and magnitude of deformation.

Practical implications

The proposed model of predicting the deformation from riveting process was available in the early design stages, and some efficient suggestions for controlling deformation could be obtained.

Originality/value

A new predicting model of thin-walled sheet metal parts riveting deformation was presented to help the engineers to predict and control the assembly deformation more exactly.

Details

Assembly Automation, vol. 36 no. 3
Type: Research Article
ISSN: 0144-5154

Keywords

Article
Publication date: 19 November 2020

Yan Zhang, Kai Li, Hai Yu, Jiang Wu and Bo Gao

This paper aims to present a new design for removable partial dentures (RPDs) for partially edentulous patients to improve the efficiency and quality of RPD manufacturing…

Abstract

Purpose

This paper aims to present a new design for removable partial dentures (RPDs) for partially edentulous patients to improve the efficiency and quality of RPD manufacturing. Additive and subtractive manufacturing technologies and zirconium silicate micro-ceramic bonding in the aesthetic zone are used herein.

Design/methodology/approach

A case was presented. First, RPD digital definitive casts were acquired, and then digital frameworks with crown retainers and digital crowns were obtained by computer-aided design (CAD). The titanium alloy frameworks and resin crowns were fabricated by three-dimensional (3D) printing and computer-aided manufacturing (CAM) processes, respectively. The crowns adhered to the crown retainers. Ceramage bonding was used to reform the gingival anatomy in the aesthetic zone during the fabrication of the RPDs. The finished RPDs were assessed by a clinician and delivered to the patient.

Findings

The RPDs were conventionally assessed by a clinician, were deemed to be accurate and satisfied both the patient and clinician.

Originality/value

This novel method provides a way to fabricate RPDs with a combination of additive and subtractive manufacturing technologies. The design of the framework was different from that of a conventional framework because it contained the crown retainers, and the traditional base retainer no longer existed. Ceramage bonding was used to replicate the gingival anatomy in the aesthetic zone. The new RPDs provided accuracy and were less time-consuming to produce than those produced with the traditional method. The new method enables the digital manufacturing of nearly the entire RPDs.

Details

Rapid Prototyping Journal, vol. 27 no. 1
Type: Research Article
ISSN: 1355-2546

Keywords

Article
Publication date: 1 March 1999

P. Hillion

The divergence equations in Maxwell’s theory are Gauss law and the statement that magnetic monopoles do not exist; from this point of view these two equations are fundamental…

282

Abstract

The divergence equations in Maxwell’s theory are Gauss law and the statement that magnetic monopoles do not exist; from this point of view these two equations are fundamental. However, from a practical point of view, it is generally believed that Maxwell’s divergence equations are redundant and may be ignored provided that they are satisfied at some time t‐0. It has been proved recently that this idea is not correct for boundary‐initial value problems. To make mathematical arguments more accessible, we analyse here the role of the divergence equations in the framework of 2D‐electromagnetism.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 18 no. 1
Type: Research Article
ISSN: 0332-1649

Keywords

Article
Publication date: 1 April 2005

Yuanqiang Zhou, Lei Lu and Bo Jiang

More and more foreign companies, including multinational companies, open business in China. The staff management under the local culture of China is one of the critical points…

4476

Abstract

Purpose

More and more foreign companies, including multinational companies, open business in China. The staff management under the local culture of China is one of the critical points affecting the success of foreign invested companies in China. This paper aims to illustrate the effective methods of staff management for foreign invested companies in China.

Design/methodology/approach

For this purpose, a survey on concrete practices of staff management was conducted among three multinational company affiliates in China, whose parent companies are located in the USA, Japan, and Europe, respectively, by the in‐depth interviews with the high‐level executives of the affiliates.

Findings

It was found that although the staff management experiences of the surveyed affiliates show differences in operation, the affiliates have a common sense on how to balance culture difference, how to effectively communicate with staff, and how to appraise the performance. The active and passive factors of these experiences were further analysed from the needs level under current Chinese economic situation and from the invisible impacts on human behaviour of Chinese culture.

Research limitations/implications

This study surveyed only three multinational company affiliates in China and therefore, the understanding obtained is limited in scope. The comprehensive knowledge of the subject depends on more case studies.

Practical implications

The analysis reveals that the active factors and localization, especially localization of the management team, are very important to the staff management of foreign invested companies in China.

Originality/value

The paper contributes to the research on effective methods for staff management in multinational companies.

Details

Management Decision, vol. 43 no. 4
Type: Research Article
ISSN: 0025-1747

Keywords

Article
Publication date: 6 September 2011

Consolate Nsabimana and Bo Jiang

Dahlia is an ornamental plant originating from Mexico where it is considered as the National flower. The purpose of this paper is to investigate tubers from yellow, white and…

413

Abstract

Purpose

Dahlia is an ornamental plant originating from Mexico where it is considered as the National flower. The purpose of this paper is to investigate tubers from yellow, white and red‐flowered cultivars of the common garden Dahlia (D. pinnata) for their chemical composition.

Design/methodology/approach

The composition of minerals was determined using Atomic Absorption Spectrometry (AAS), whereas vitamins were analyzed by High‐Performance Liquid Chromatography (HPLC).

Findings

Carbohydrates represented the major constituent in Dahlia tubers, followed by fibre and protein. Tubers of the yellow‐flowered cultivar “HGH” contained the highest amount of carbohydrates, while tubers of the white‐flowered cultivar “BJ” and those of the red‐flowered cultivar “XM” abounded in fibre and protein, respectively. In addition, Dahlia tubers exhibited varying concentrations of minerals, among which potassium, calcium, magnesium, phosphorus, zinc and chromium were predominant. Tubers of the white‐flowered cultivar “LB” contained the highest amounts of magnesium and phosphorus. Moreover, tubers of the red‐flowered cultivar “MLH” showed the highest contents of potassium and chromium, whereas those of the red‐flowered cultivar “XM” were rich in calcium and zinc. Furthermore, Dahlia tubers were found to contain water and fat soluble vitamins, among which vitamins B2, B6, B7 and E were the most abundant. Tubers of the white‐flowered cultivar “BJ” exhibited the highest contents of water soluble vitamins, whereas those of the white‐flowered cultivar “LB” abounded in fat soluble vitamins.

Originality/value

Despite the considerable variability observed among cultivars, Dahlia might be utilized as an alternative food resource for human nutrition.

Details

British Food Journal, vol. 113 no. 9
Type: Research Article
ISSN: 0007-070X

Keywords

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