35 results on '"Mei, Qiang"'
Search Results
2. Structural analysis and vulnerability assessment of the European LNG maritime supply chain network (2018–2020).
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Mei, Qiang, Qinyou, Hu, Hu, Yu, Yang, Yang, Liu, Xiliang, Huang, Zishuo, and Wang, Peng
- Subjects
SUPPLY chains ,LIQUEFIED natural gas ,NETWORK governance ,DEEP learning ,STAIR climbing ,ENERGY industries ,CLEAN energy - Abstract
With the proposal of the development goals for pollution control, the use of liquefied natural gas (LNG) as a clean and low-carbon energy source has received huge attention in the European energy market. This study examines the European LNG maritime supply chain network's structural evolution from 2018 to 2020 using AIS data. Our analysis reveals a marked quantitative increase in the network's scale, with European shipments climbing from 695 to 1337 and cargo volumes soaring from 40,101,000 tons to 87,129,740 tons, signifying annual growth rates of 92.4% and 117.3%, respectively. A graph deep learning approach unveiled enhanced connectivity and community consolidation among European LNG ports despite the dispersion suggested by a slight density decrease from 0.192 to 0.185. Simulated attack scenarios indicate heightened network robustness in 2020, yet emphasize the criticality of safeguarding nodes like Sebatta against targeted disruptions. Addressing these insights, we propose policies focused on energy diversification, fortified port security, and adaptive governance to bolster the network's resilience amidst dynamic global conditions. Our study thus offers a strategic framework for managing energy trade complexity, acknowledging the need for further research on the geopolitical impact on network dynamics and vulnerability. [ABSTRACT FROM AUTHOR]
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- 2024
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3. Impact analysis of behavior of front-line managers on employee safety behavior by integrating interpretive structural modeling and Bayesian network
- Author
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Liu, Su-Xia, Chen, Hua-Zhong, Mei, Qiang, Zhou, Ying, and Edmund, Nkrumah Nana Kwame
- Abstract
ABSTRACTEmployee safety behavior is a basic element of enterprise work safety. The results of accident investigations and risk assessments in enterprises indicate that management factors are some of the most important factors that affect employee safety behavior. The purpose of this study is to explore the relationship between the behavior of front-line managers (FLMs) and employee safety behavior by integrating a qualitative method, i.e., the interpretive structural model (ISM), and a quantitative method, i.e., the Bayesian network (BN). The results of the BN analysis showed that safety incentives and safety communication were the best predictors of safety participation, while safety supervision and safety control were the best predictors of safety compliance. Moreover, the results revealed that an instantaneous improvement of safety communication, safety incentives, safety supervision and safety guidance was the most effective joint measure to reach a high-level of safety behavior of employees in the workplace.
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- 2022
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4. Effect of green supply chain collaboration on the HSE performance of manufacturing SMEs.
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Nai, Hong, Mei, Qiang, Liu, Suxia, and Zhang, Jingjing
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• Researched the effect of GSCC on HSE performance of manufacturing SMEs. • GSCC positively affects the HSE performance of manufacturing SMEs. • HSE resources play a mediating role between GSCC and the HSE performance of manufacturing SMEs. To clarify the effect of green supply chain collaboration (GSCC) on the HSE performance of manufacturing SMEs, through theoretical and literature analysis, a conceptual model of the effect of GSCC on the HSE performance of manufacturing SMEs is constructed, and the model and hypotheses are empirically tested using structural equation modeling. The research results show that GSCC positively affects the HSE performance of manufacturing SMEs; the HSE implementation motivation plays a mediating role between GSCC and HSE resources; the HSE resources play a mediating role between GSCC and HSE performance of manufacturing SMEs. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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5. A comprehensive assessment of the importance of the "Maritime Silk Road" route based on multi-dimensional data-driven approaches.
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Wang, Peng, Hu, Qinyou, Bai, Lu, Xue, Tong, Hu, Wenlong, and Mei, Qiang
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BELT & Road Initiative ,TRADE routes ,AUTOMATIC identification ,GEOSPATIAL data ,NAVIGATION in shipping ,MARITIME shipping - Abstract
Worldwide straits are crucial pathways for global trade and energy transportation, occupying key strategic positions. Therefore, this study utilizes automatic identification system (AIS) data and the structure of the maritime transportation network formed by ship navigation, combined with geospatial big data analysis, to fully consider factors including the natural navigational conditions of routes, the support capabilities of surrounding ports, the geographic advantages of neighboring countries, and the distribution of the shipping network importance in the CCAS evaluation model. To assess the navigability of maritime routes, a data-driven model was constructed using three layers of this model. Empirical analyses were conducted on 22 major routes along China's coast and the "Maritime Silk Road". This method has significantly enhanced the accuracy and reliability of route assessments, and the improved assessment model demonstrated better navigational conditions in the South China Sea routes, identifying internal factors hindering the development of these critical maritime routes. The findings of this study provide a comprehensive assessment and analysis framework for global maritime transportation, offering crucial reference information for key stakeholders, including policy makers, port and berth infrastructure investors, maritime economists, and large shipping companies. Additionally, the study's results can be practically applied in the actual shipping trade, emphasizing the role of our framework in facilitating effective decision-making and strategic planning within the maritime industry. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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6. The effect of perceived organizational support for safety and organizational commitment on employee safety behavior: a meta-analysis
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Liu, Suxia, Yang, Xu, and Mei, Qiang
- Abstract
Recently, the significance of organizational support and commitment in workplace safety has gained much recognition. The improvement of individual safety behavior needs more convincing and effective evidence. This study constructed a comprehensive theoretical model and used meta-analysis to examine the relationships between perceived organizational support for safety, organizational commitment and employee safety behavior. Support was found for the study’s hypothesis that both perceived organizational support for safety and organizational commitment have a positive association with employee safety behavior, with the latter demonstrating the stronger relationship. However, organizational commitment was not mediated by perceived organizational support for safety and employee safety behavior. Results show that the safety behavior of employees in general industries and developed regions is more vulnerable to perceived organizational support for safety and organizational commitment than that in high-risk industries and developing regions. The implications of the findings and suggestions for further research are discussed.
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- 2021
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7. A semantic software development based on random probability distribution model
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Mei, Qiang, Huang, Yanmei, Anandhan, Prathik, and Parthasarathy, R.
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Machine learning strategies to automate data processing are urgently needed with the increasing accumulation of biological datasets. In recent years, software development has received considerable attention because of its interpretation of the model topics originating from natural language processing. In this article, the application and development of semantic software development emphasise the understanding of semantic software development. Furthermore, literature was reviewed and evaluated in detail based on semantic software development models to the clustering-based random probability distribution model (CRPDM). However, the related studies offered an outlook for the use of topical models to create semantic software applications according to the types of models based on the random probability entity. The simulation of CRPDM improves the accuracy and performance of analysing semantic software applications. Furthermore, the theme models are a promising method in semantic software development research for different applications that have been firmly researched in this paper.
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- 2021
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8. Aptamer-Cholesterol-Mediated Proximity Ligation Assay for Accurate Identification of Exosomes
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Zhao, Xianxian, Luo, Canjun, Mei, Qiang, Zhang, Hongmin, Zhang, Wenqing, Su, Dongwei, Fu, Weiling, and Luo, Yang
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Accurate identification of exosomes plays an essential role in facilitating disease diagnosis and therapies. Herein, we proposed an Aptamer-cholesterol-mediated Proximity Ligation Assay (AcmPLA) for accurate identification of exosomes in a dual-probe strategy, one aptamer probe for recognition of exosomal innate surface protein CD63 and another cholesterol probe for biolipid layer targeting. By integrating a proximity ligation of probes bound with exosomal biomarkers for specific recognition and a rolling circle amplification (RCA) strategy for signal amplification, we have successfully developed an exosomes-surface approach that can perform “AND” logic analysis of dual biomarkers, which not only could be used for exosomes quantification, but also for exosomes tracing. Besides RCA-initiated signal amplification, CD9 antibody-labeled magnetic beads were used to capture exosomes for isolation and secondary signal enrichment. Our approach can achieve specific exosomes isolation and accurate identification and thus could be exploited for broad applications in biological science, biomedical engineering, and personalized medicine.
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- 2020
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9. A Safety Signaling Game for Small and Medium-sized Manufacturing Enterprises in the Supply Chain
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Mei, Qiang, Zhou, Qiaomei, Liu, Suxia, and Wang, Qiwei
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Due to information asymmetry and a prevailing focus on production that ignores safety among small and medium-sized manufacturing enterprises (SMMEs), it is difficult for core enterprises in the supply chain (SC) to establish partnerships with SMMEs that have a high safe production level (SPL). We found that SMMEs would conceal their real SPL when being selected as core enterprise suppliers. This is known as adverse selection. According to the principal-agent theory, we built a signaling model to analyze the conditions of the pooling equilibrium and the separate equilibrium of the signaling game between core enterprises and SMMEs. The equilibrium results showed that adjusting the signal cost parameters of the SMMEs can guide the market to separate equilibrium and stop SMMEs from concealing or exaggerating their SPL. We also discuss corresponding suggestions. This research can reduce SC risks and promote the establishment of sustainable cooperative relationships between core enterprises and SMMEs with high SPLs. This study is applicable globally.
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- 2020
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10. Effects of organizational safety on employees’ proactivity safety behaviors and occupational health and safety management systems in Chinese high-risk small-scale enterprises
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Mei, Qiang, Wang, Qiwei, Liu, Suxia, Zhou, Qiaomei, and Zhang, Jingjing
- Abstract
Based on the characteristics of small-scale enterprises, the improvement of occupational health and safety management systems (OHS MS) needs an effective intervention. This study proposed a structural equation model and examined the relationships of perceived organization support for safety (POSS), person–organization safety fit (POSF) and proactivity safety behaviors with safety management, safety procedures and safety hazards identification. Data were collected from 503 employees of 105 Chinese high-risk small-scale enterprises over 6 months. The results showed that both POSS and POSF were positively related to improvement in safety management, safety procedures and safety hazards identification through proactivity safety behaviors. Our findings provide a new perspective on organizational safety for improving OHS MS for small-scale enterprises and extend the application of proactivity safety behaviors.
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- 2020
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11. Understanding Mechanisms of Synergy between Acidification and Ultrasound Treatments for Activated Sludge Dewatering: From Bench to Pilot–Scale Investigation.
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Cai, Mei-Qiang, Hu, Jian-Qiang, Wells, George, Seo, Youngwoo, Spinney, Richard, Ho, Shih-Hsin, Dionysiou, Dionysios D., Su, Jie, Xiao, Ruiyang, and Wei, Zongsu
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- 2018
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12. Study of the influence of employee safety voice on workplace safety level of small- and medium-sized enterprises
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Zhang, Jingjing, Mei, Qiang, and Liu, Suxia
- Abstract
Purpose: To improve unsafe workplace of Chinese SMEs, this paper aims to use the multi-agent simulation experiment to reveal the relationship between employees’ safety voice and safety level of enterprises. Design/methodology/approach: Through simulation of employees’ safety voice activities, enterprises’ production activities, enterprises’ safety activities, an experiment platform is built. The experiment introduces external variable of labor resource and sets four experimental situations considering whether labor resource is sufficient and whether employees’ value is significant. Findings: The result shows that not all the employees’ safety voice can change small- and medium-sized enterprises’ safety level. When there is sufficient labor supply, employee safety voice cannot improve the safety level of enterprises; when there is short of labor and employee safety voice is strong, safety level can be effectively improved. When employees have the strikingly different value variance, safety voice of common employees cannot improve safety level of enterprises, but employee safety voice with high value can improve safety level. Originality/value: This fully provides that under the circumstances of disappearing demographic dividend in China, improving employees’ safety awareness and reasonably using their safety voice can boost SMEs to enhance safety level.
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- 2019
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13. Understanding Mechanisms of Synergy between Acidification and Ultrasound Treatments for Activated Sludge Dewatering: From Bench to Pilot–Scale Investigation
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Cai, Mei-Qiang, Hu, Jian-Qiang, Wells, George, Seo, Youngwoo, Spinney, Richard, Ho, Shih-Hsin, Dionysiou, Dionysios D., Su, Jie, Xiao, Ruiyang, and Wei, Zongsu
- Abstract
Enhancing activated sludge dewaterability is of scientific and engineering importance in the face of accelerated urbanization and stringent environmental regulations. In this study, we investigated the integration of acidification and ultrasound (A/US) treatment for improving sludge dewaterability at both bench- and pilot-scales. Our results showed that the A/US process exhibited significantly improved sludge dewatering performance, characterized by capillary suction time, cake moisture, and water/solid content of sludge cake. Synergistic dewatering mechanisms were elucidated with a suite of macro and spectroscopic evidence. Characterization of treated sludge revealed that US-induced thermal, mechanical shearing force, and radical oxidation effects disrupts floc cells and accelerates the decomposition of extracellular polymeric substances (EPS), releasing bound water into the bulk phase. In addition to enhancing hydrolysis of EPS, the acidic pH environment caused the protonation of functional groups on EPS, facilitating the reflocculation of US decomposed sludge for improved filterability. Our bench-scale and pilot-scale investigations provide a mechanistic basis for better understanding of the A/US process, and enable development of a viable and economical dewatering technology.
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- 2018
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14. Finite element modeling of multilayered structures of fish scales.
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Chandler, Mei Qiang, Allison, Paul. G., Rodriguez, Rogie. I., Moser, Robert. D., and Kennedy, Alan. J.
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SCALES (Fishes) ,POLYPTERUS senegalus ,ALLIGATOR gar ,ARAPAIMA ,FINITE element method - Abstract
The interlinked fish scales of Atractosteus spatula (alligator gar) and Polypterus senegalus (gray and albino bichir) are effective multilayered armor systems for protecting fish from threats such as aggressive conspecific interactions or predation. Both types of fish scales have multi-layered structures with a harder and stiffer outer layer, and softer and more compliant inner layers. However, there are differences in relative layer thickness, property mismatch between layers, the property gradations and nanostructures in each layer. The fracture paths and patterns of both scales under microindentation loads were different. In this work, finite element models of fish scales of A. spatula and P. senegalus were built to investigate the mechanics of their multi-layered structures under penetration loads. The models simulate a rigid microindenter penetrating the fish scales quasi-statically to understand the observed experimental results. Study results indicate that the different fracture patterns and crack paths observed in the experiments were related to the different stress fields caused by the differences in layer thickness, and spatial distribution of the elastic and plastic properties in the layers, and the differences in interface properties. The parametric studies and experimental results suggest that smaller fish such as P. senegalus may have adopted a thinner outer layer for light-weighting and improved mobility, and meanwhile adopted higher strength and higher modulus at the outer layer, and stronger interface properties to prevent ring cracking and interface cracking, and larger fish such as A. spatula and Arapaima gigas have lower strength and lower modulus at the outer layers and weaker interface properties, but have adopted thicker outer layers to provide adequate protection against ring cracking and interface cracking, possibly because weight is less of a concern relative to the smaller fish such as P. senegalus . [ABSTRACT FROM AUTHOR]
- Published
- 2014
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15. A novel method of wide searching scope and fast searching speed for image block matching
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Xiangli, Bin, Kim, Dae Wook, Xue, Suijian, Yu, Fei, Li, Chao, Mei, Qiang, and Lin, Zhe
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- 2015
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16. CYP1B1 Asn453Ser polymorphism and colorectal cancer risk: a meta-analysis.
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Mei, Qiang, Zhou, Daijun, Han, Jialong, Lu, Hai, and Tang, Bo
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GENETIC polymorphisms ,COLON cancer risk factors ,CYTOCHROME P-450 genetics ,META-analysis ,CONFIDENCE intervals ,SINGLE nucleotide polymorphisms ,MEDICAL statistics - Abstract
Abstract: Studies investigating the association between cytochrome P450 1B1 (CYP1B1) Asn453Ser (453 A/G, rs1800440) polymorphism and colorectal cancer (CRC) risk report conflicting results. The aim of this study was to quantitatively summarize the evidence for such a relationship. Two investigators independently searched the Medline and Embase Databases. Summary odds ratios (ORs) and 95% confidence intervals (95% CIs) for CYP1B1 polymorphism and CRC were calculated in a fixed-effects model (the Mantel–Haenszel method) and a random-effects model (the DerSimonian and Laird method) when appropriate. The pooled ORs were performed for co-dominant model (GG vs AA, GA vs AA), dominant model (GG+GA vs AA), and recessive model (GG vs GA+AA). This meta-analysis included 7 case-control studies, which included 6375 CRC cases and 7003 controls. Overall, the variant genotypes (GG and GA) of the 453 A/G were not associated with CRC risk when compared with the wild-type AA homozygote (GG vs AA, OR=0.94, 95% CI=0.77–1.14; GA vs AA, OR=0.99, 95% CI=0.87–1.12). Similarly, no associations were found in the dominant and recessive models (dominant model, OR=0.98, 95% CI=0.87–1.09; recessive model, OR=0.94, 95% CI=0.77–1.14). When stratifying for country, study sample size, matched control and source of controls, no evidence of significant association was observed in any subgroup, except among those studies from “Canada”. No publication bias was found in the present study. No association was found between the CYP1B1 Asn453Ser polymorphism and risk of CRC among Caucasians. [Copyright &y& Elsevier]
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- 2012
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17. Evaluation methods of port dominance: A critical review.
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Wang, Peng, Hu, Qinyou, Xu, Yongjun, Mei, Qiang, and Wang, Fei
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EVALUATION methodology ,SOCIAL dominance ,INTERNATIONAL competition ,HARBORS ,INTERNATIONAL trade - Abstract
With the continuous advancement of the global economy and international trade, the competition among ports becomes increasingly fierce. Numerous studies show that evaluation methods of port dominance can effectively quantify the appropriate dominance index and find the weak links to enhance ports' comprehensive competitiveness. This paper summarizes the port dominance evaluation methods in the existing literature and expounds their importance based on the development of information technology in shipping activities. Moreover, the application scope, the advantages, and disadvantages of current evaluation methods are explained using qualitative, quantitative, deductive, and retrospective methods. It was found that, with the development of information technology, evaluation methods are becoming more comprehensive, targeted, specialized, refined, digitalized, and intelligentized. It was also found that since existing studies often adopt single-faceted evaluation methods and select a single factor for evaluation, they cannot effectively analyze and evaluate the real advantages of the port. In addition, the present paper discusses the prospects of ports and potential research. [ABSTRACT FROM AUTHOR]
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- 2021
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18. Essentials of Greenland Planning between Urban and Foothills
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Wan, Mei Qiang
- Abstract
The foothills land can be used as different methods by the gradient 30 and 45. The low gradient land plans as the scenic greenbelt or parks for people; the high gradient land plans as green space for wild. Best use for foothills can enhance the city plan beyond hills.
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- 2013
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19. Facile Synthesis of Graphene Nanosheets and their Anode Electrochemical Performances in Lithium Ion Batteries
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Ge, Qi Sheng, Wang, Dong Fang, Ping, Guang Xing, Chen, Da, Fan, Mei Qiang, Qin, Lai Shun, Lv, Chun Jv, and Shu, Kang Ying
- Abstract
In this work, graphene nanosheets (GNSs) were prepared by the thermal pyrolysis of graphene oxide (GO) at 900 °C for 3 h, and their electrochemical performances as anode materials for lithium ion batteries (LIBs) were also investigated. TEM and SEM images clearly showed that the as-prepared GNSs had a transparent two-dimensional (2D) structure with 5~10 multilayers. The other experimental results (XRD, Raman, TG and FT-IR) confirmed the successful synthesis of GNSs. Electrochemical measurements revealed that GNSs had an initial discharge capacity of 1276 mAh g
-1 and still remained 723 mAh g-1 after 50 cycles, indicating that the as-prepared GNSs shows a great potential as anode materials for LIBs.- Published
- 2013
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20. Enhancing the Performance of Polymer Photovoltaic Cells by Using an Alcohol Soluble Fullerene Derivative as the Interfacial Layer
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Mei, Qiang, Li, Cuihong, Gong, Xue, Lu, Heng, Jin, Enquan, Du, Chun, Lu, Zhen, Jiang, Li, Meng, Xiangyue, Wang, Chunru, and Bo, Zhishan
- Abstract
Alcohol soluble fullerene derivative (FN-C60) has been synthesized and used as a cathode interfacial layer for high-efficiency polymer solar cells (PSCs). To examine the function of the FN-C60interfacial layer, polymer solar cells were fabricated with blends of P3:PC71BM, HXS-1:PC71BM, PDFCDTBT:PC71BM, and PDPQTBT:PC71BM as the active layer. In comparison to the bare Al electrode, power conversion efficiencies (PCEs) of P3:PC71BM, HXS-1:PC71BM, PDFCDTBT:PC71BM, and PDPQTBT:PC71BM based PSCs were increased from 3.50 to 4.64%, 4.69 to 5.25%, 2.70 to 4.60%, and 1.52 to 2.29%, respectively, when FN-C60/Al was used as the electrode. Moreover, the overall photovoltaic performances of PSCs with the FN-C60/Al electrode were better than those of cells with LiF/Al electrode, indicating that FN-C60is a potential interfacial layer material to replace LiF.
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- 2013
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21. Study on Emergency Management of Sudden Water Pollution Accidents
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Zhang, Yun Long and Mei, Qiang
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China is facing serious environmental pollution problems and the increasingly worsening water pollution as well as frequent sudden water pollution accidents has become the most notable one. Based on theory of risk prediction and group decision, a series of emergency management methods in dealing with sudden water pollution accidents was presented. In which grey system theory was used in the prediction of sudden water pollution accidents and a GM(1,1) model was given. The results gotten from the GM(1,1) model might be useful in improving our ability of the prevention and treatment of emergent accidents. At the same time, the method of multiple group decision-making was used to illustrate the progress of making decision in real-time event of sudden water pollution accidents. This method will help the decision maker make effective decisions under emergency situation which will reduce the probability of risk, minimize losses, and guarantee the national economic and social security.
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- 2013
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22. Enhancement of Coagulation Process with Floatation for the Treatment of Dyeing Wastewater
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Wu, Yuan Hui, Zhou, Hui Ting, Du, Chun Hui, Wu, Li Guang, Cai, Mei Qiang, Wang, Ting, and Wu, Chun Jin
- Abstract
Coagulation process enhanced with floatation was applied to treat dyeing wastewater generated from the production process of textile. The efficiency was mainly evaluated in terms of the chemical oxygen demand (COD) removal of mixed wastewater. Comparing the coagulation experiment with coagulation-floatation experiment on the performance of COD removal for the dyeing wastewater, we can find that floatation promote the effect of coagulation. The results show that: the COD removal of the dyeing wastewater in the coagulation-floatation experiment can reach 68% after floatation with the speed of 1.2 L/min for 4 min and maintaining standstill for 90 min, which is 17% more than the result appeared in coagulation experiment, under the conditions of the dosage of AlCl
3 and PAM is 100 mg/L and 15 mg/L, respectively.- Published
- 2013
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23. Determination of Trace PCBs in Water by GC-MS with Ionic Liquid Based Headspace Single-Drop Microextraction under Ultrasound
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He, Shi Wei, Shen, Chen Yi, Wei, Xiao Qin, Jin, Mi Cong, and Cai, Mei Qiang
- Abstract
An accurate and sensitive method has been developed for the determination of PCBs in water by gas chromatography coupled with mass spectrometry (GC/MS) with ionic liquid based headspace single-drop microextraction under ultrasound. The sample injection part of gas chromatographic instrument was modifed to avoid the ionic liquid leaking, selected 1-butyl-3-methylimidazolium hexafluorophosphate ([C
4 MI[PF6 ]) as extracting agents. Experimental parameters influencing the extraction performance, such as desorption temperature, ultrasound extraction time, extraction temperature, ionic liquid headspace volume and salt effect, were optimized. Calibration curve was linear within the range of 10~300.0 μg/L, and the extraction recoveries with RSD values lower than 9.1% were from 77.6% to 103.3%. The limits of detections (LOD), calculated on the basis of signal-to-noise ratio of 3 (S/N=3), was in the range of 0.005~0.007 μg/L. This method is found to be simple, sensitive, little interferential and good specificity for the determination of trace PCBs in water. Real sea sample was successfully analyzed using this method.- Published
- 2013
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24. Study on Low-Carbon Emission Economic Pattern Based on Transformation and Upgrading of Zhenjiang's Industrial Structure
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Li, Wen, Mei, Qiang, and Wu, Meng Yun
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This paper analyzes the industrial structure of Zhenjiang city with multiple perspectives in Jiangsu province in China, such as: input structure, output structure and their contributions to GDP. The study focuses on the industrial structures themselves and the relations among them with the drawing of industrial economics theory, regional economics and priority economic growth theory. The shifting mode about Zhenjiang's industrial structures during the 10th Five-Year and the 11th Five-Year plans are presented in detail and in depth in this paper. The contribution to economic growth caused by upgrading of industrial structures in low-carbon emission economic model is analyzed. Finally, it is proposed an economic model system based on the transformation and upgrading of industrial structures.
- Published
- 2013
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25. Static Scheduling Model and its Heuristic Algorithm for Agile Supply Chain Based on Schedulable Periods
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Wang, Jian Hua, Mei, Qiang, Huang, Xian Feng, and Luo, Jian Qiang
- Abstract
Agile supply chain must possess the ability of utilizing alliance corporations’ production capacity fully in a systematic view, in order to meet the market demands and its changes quickly and economically. Powerful scheduling techniques are the key support for supply chains’ agility. Based on the discontinuous schedulable periods of suppliers, an agile supply chain static scheduling under schedulable periods (ASCSSSP) of multiple optional suppliers for each part is studied. According to the final product’s supplying BOM, this paper sets up a structural framework model for agile supply chains firstly, then analyzes and builds a mathematic model for the task assignment and schedule optimization of ASCSSSP with the supply-demand time and quantity constraints, and especially designs a novel heuristic algorithm of Task Adjusted by Cost (TAC) to solve the model. Finally, by some numerical experiments, the efficiency and practicability of the model and algorithm is verified by contrasting analysis.
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- 2012
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26. The Behaviors of Removing Silver Ions by Low-Cost Expanded Rice Husk, Nature Diatomite and Nature Bentonite as Sorbents
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Liang, Xuan, Luo, Xue Gang, Lin, Xiao Yan, and Mei, Qiang
- Abstract
Low cost industrial and agricultural by-products are promising materials for water pollution treatment such as removal of heavy metals. This work deals with removal of silver ions from solutions using expanded rice husk (ERH), nature diatomite (ND) and nature bentonite (NB). Firstly the influence of pH value of the solution on adsorption capacity for silver ions was studied, and then the effect of initial silver concentration on adsorbents adsorption capacity was investigated. The silver ions removal percentage increases with initial pH and achieves a maximum value of nearly 94% at pH= 5.0 ± 0.5 for ERH. The maximum adsorption capacity is 18.6 mg/g for ERH.
- Published
- 2012
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27. The Research of Supply Chain Based on Fourth Party Logistics Optimization
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Li, Wen, Wu, Meng Yun, and Mei, Qiang
- Abstract
With the economic globalization and the rapid development of high-technology, the traditional competition between enterprises has gradually evolved into the competition between the supply chains. It is described the structure models of supply chain and problems existing in the supply chain management, focuses on the comparison between the fourth party logistics and the third party logistics, based on the excellent management ability of the fourth party logistics and its ability to plan and design the supply chain. It is studied how to optimize supply chain through the fourth party logistics in the paper.
- Published
- 2012
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28. A Research on SME’s and Migrant Workers’ Behavior Choice of Industrial Injury Insurance
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Wang, Yan and Mei, Qiang
- Abstract
In order to protect the occupational health and safety of migrant workers, government has developed a series of regulations, policies, and requires enterprises to pay injury insurance costs for migrant workers. Most of migrant workers concentrate in small and medium enterprises (SME’s). The intrinsic motivation that SMEs will pay the cost of industrial injury insurance for migrant workers is not strong. The migrant workers also do not want SMEs to pay the costs. Therefore, proceeding from the fundamental interests of the SMEs and migrant workers, the article is based on Evolutionary Game approach and analyzes the evolution paths of SMEs’ behaviors. The research provides the reliable theory reference for Chinese government to adjust the industrial injury insurance policy and protect the occupational health and safety of migrant workers’.
- Published
- 2012
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29. Modeling Nanoindentation of Calcium Silicate Hydrate
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Chandler, Mei Qiang, Peters, J. F., and Pelessone, D.
- Abstract
The discrete element method (DEM) was used to model nanoindentation of calcium silicate hydrate (C-S-H). The interparticle forces consisted of the traditional friction and contact forces that operate in granular materials, with the addition of nanometer-scale forces between gels, including van der Waals and electric double-layer forces. The contact normal forces were based on Hertz contact law. The van der Waals attractive forces were calculated on the basis of Hamaker's equation. The electric double-layer forces, generated from the negative charges on the C-S-H gel surface and the ion species in the pore solution, were calculated by using Monte Carlo simulations. The particles are spherical with diameters of approximately 5 nm. Both elastic modulus and hardness, calculated from the DEM, were much smaller than the results from nanoindentation experiments. The effects of interparticle forces on the elastic modulus and hardness were studied to explore possible reasons for the differences. The simulations give insight into the morphology of C-S-H nanoparticles and the interparticle forces between C-S-H nanoparticles.
- Published
- 2010
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30. Feasibility Study of Hydrogen Generation from the Milled Al-Based Materials for Micro Fuel Cell Applications.
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Fan, Mei-qiang, Sun, Li-xian, and Xu, Fen
- Published
- 2009
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31. Enhanced Hydrogen Storage Performance of LiBH4−SiO2−TiF3Composite
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Zhang, Yao, Zhang, Wan-Sheng, Fan, Mei-Qiang, Liu, Shu-Sheng, Chu, Hai-Liang, Zhang, Yan-Hua, Gao, Xiu-Ying, and Sun, Li-Xian
- Abstract
The destabilization approach for SiO2-doped LiBH4hydrogen storage composite is identified as 4LiBH42SiO2→ Li4SiO44B Si 8H2, and Li4SiO4is the thermodynamic obstacle for its reverse action. TiF3was doped in the composite for avoiding the formation of Li4SiO4and thus enhancing the reversible hydrogen storage properties. Experimental analysis on LiBH4−SiO2−TiF3composite was performed via thermogravimetry (TG), temperature programmed desorption (TPD), mass spectral analysis (MS), differential scanning calorimetry (DSC), isothermal sorption, and powder X-ray diffraction (XRD). For LiBH4−20 wt % SiO2−30 wt % TiF3composite, the dehydrogenation temperature starts from 70 °C and decreases by an average of 100 °C from that of LiBH4−20 wt % SiO2. Its maximum amount attains 8.3 wt % below 500 °C. The whole dehydrogenation can be regarded as a two-step process: (i) preferential reaction (3LiBH4TiF3→ 3LiF TiB2B 6H2) occurring at around 70 °C, and (ii) principal reactions occurring simultaneously both at interface (LiBH4TiF3SiO2) and inside the bulk (self-decomposition of LiBH4). Doped TiF3noticeably reduces the energy activation of the reaction at interface. However, the reaction inside the bulk is the rate-controlled process. This composite also demonstrates the ability of rehydrogenation under the pressure of 4.5 MPa. The hydrogen absorption is temperature-dependent and reaches 4 wt % H2within 14 000 s at 500 °C.
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- 2008
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32. Hydrogen Generation by Hydrolysis Reaction of Ball-Milled Al−Bi Alloys.
- Author
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Fan, Mei-Qiang, Xu, Fen, and Sun, Li-Xian
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- 2007
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33. p53 codon 72 polymorphism (C/G) and the risk of human papillomavirus-associated carcinomas in China<FNR HREF="fn1"></FNR> <FN ID="fn1">This study was a key project of the Beijing Metropolitan Science and Technology Committee and Human Disease Gene Center at Peking University, Peking, and the Chinese National Human Genome Center, Beijing.</FN>
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Li, Tao, Lu, Zhe-Ming, Guo, Mei, Wu, Qin-Jiao, Chen, Ke-Neng, Xing, Hai-Ping, Mei, Qiang, and Ke, Yang
- Abstract
Human papillomavirus (HPV) plays an important role in the development of carcinomas at various body sites. It was found previously that the p53 codon 72 polymorphism (C/G) is a high-risk factor for the development HPV-associated cervical carcinoma. However, it still was considered controversial in several studies of cervical and esophageal carcinoma. In the current study, the authors used an allele specific polymerase chain reaction (PCR) method to analyze correlation between the p53 codon 72 (C/G) polymorphism and HPV-associated, noncancerous esophageal epithelium as well as esophageal, ovarian, and breast carcinoma in the Chinese population. Esophageal balloon cytology examination samples were obtained from high-incidence and low-incidence populations for esophageal carcinoma in Anyang (Henan Province). Thirty-six of 48 esophageal balloon samples from the high-incidence population were HPV positive, and 13 of 33 esophageal balloon samples from the low-incidence population were HPV positive. Thirty-nine of 62 esophageal carcinoma samples from Anyang Tumor Hospital were HPV positive. Twenty-six of 39 ovarian carcinoma samples from the Second Affiliated Hospital of Inner Mongolia Medical College were HPV positive. Nineteen of 82 breast carcinoma samples from Beijing Cancer Hospital were HPV positive. It is noteworthy that the distribution of the p53 codon 72 Arg homozygous genotype in HPV positive samples of esophageal epithelium, ovarian carcinoma, and breast carcinoma was significantly higher compared with HPV negative tumor samples. (P < 0.05). The current results suggest that the p53 codon 72 Arg homozygous genotype is one of the high-risk genetic factors for HPV-associated malignancies among the Chinese population. Cancer 2002;95:25716. © 2002 American Cancer Society. DOI 10.1002/cncr.11008
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- 2002
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34. Human papillomavirus type 16 is an important infectious factor in the high incidence of esophageal cancer in Anyang area of China
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Li, Tao, Lu, Zhe-Ming, Chen, Ke-Neng, Guo, Mei, Xing, Hai-Ping, Mei, Qiang, Yang, Huai-Hua, Lechner, John F., and Ke, Yang
- Abstract
To investigate the potential role of human papillomavirus (HPV) infection in the pathogenesis of esophageal carcinomas in the Anyang area of China, we have evaluated specimens collected by balloon cytology examination from volunteers in two regions with significantly different incidences of esophageal carcinoma. 138 donors were from a village in a county with an esophageal carcinoma (EC) age-adjusted mortality rate of 132×105, the remaining 68 were resident in a second village from another county with an EC mortality rate of 52×105. Specimens were evaluated using both polymerase chain reaction (PCR) amplification and in situ hybridization (ISH) protocols. PCR results showed that the prevalence of the human papillomavirus type 16 (HPV-16) E6 gene in the high incidence area was 1.9-fold higher than that of the low incidence area (72 and 37%, respectively, P < 0.01). Moreover, the positive rate corresponded with pathology grade. Similar results were obtained with the HPV-16 E7 gene. As the cells undergoing cytopathological progress, the HPV-16 E6 positive rate was increased, in both villages. In contrast to HPV-16 E6 and E7, detection of the HPV L1 gene was consistently lower, and its prevalence decreased with increasing dysplasia grades (P < 0.05). By ISH analyses, the expression rate of HPV-16 E6 in the specimens collected from the high incidence area was 2.2-fold higher than those from the low incidence area (49 versus 22%, respectively; P < 0.05), and transcription of the E6 gene paralleled cytopathology. HPV-18 was also detected in 17 and 15% of the specimens from the high and low incidence areas, respectively, but most of these samples were also simultaneously HVP-16 positive. These results suggest that HVP-16 plays a causative role in the high incidence of esophageal cancer in the Anyang region of China.
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- 2001
35. Dual-effects of core enterprise management and media attention on occupational health and safety of small and medium suppliers in China.
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Zhou, Qiaomei, Mei, Qiang, Liu, Suxia, and Wang, Qiwei
- Subjects
INDUSTRIAL hygiene ,EVOLUTIONARY economics ,CLINICAL governance ,EXPECTED returns ,BUSINESS enterprises ,SUPPLIERS ,CONSTRUCTION cost estimates - Abstract
This study examines the construction of an occupational health and safety (OHS) governance model for small- and medium-sized suppliers (SMSs) impacted by the dual effects of core enterprises' management and media attention. The objective of this research is to improve the social governance effect of SMSs' OHS. Drawing on evolutionary economics, an evolutionary game model with three main players—core enterprises, SMSs, and media—is established, and the conditions of each entity's evolutionary stability strategy are analyzed. The results show that the evolution trend for any party is closely related to the strategic choices of the other two parties. Further, a model for SMSs' OHS governance with focus on core enterprise management and media attention can be effectively built by reducing the costs of core enterprise management, enhancing the probability of accurate media reporting, decreasing the OHS input cost of SMSs, increasing the expected exposure returns of the media, and reducing the media's investigation cost. This study is the first to consider the important influence of core enterprises and the media on SMSs' OHS behavior, which bridges the research gap not only from a theoretical perspective, but also a practical one. • We consider the important influence of core enterprises and the media on SMSs' OHS behavior. • We construct an OHS governance model for SMSs affected by the dual effects of core enterprises' management and media attention. • We simulate the evolutionary process for the three players' interactions. • We examine the influences of different parameters on the three players' evolutionary stability strategy. • We offer suggestions to make every player select the ideal strategy. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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