Consumer Psychological Factors that Affect Chinese Donation Satisfaction and Continuous Donation Intention with Food Banks

Yi Jiang,Jin-Jing Zhao 한국무역연구원 2021 무역연구 Vol.17 No.1

Purpose The goal of this study is to improve the continuous donation behavior of China’s ordinary people to food bank and reduce food waste. Through the survey and measurement of China’s ordinary people’s donation satisfaction and continuous donation intention to the Food Bank;it is possible to find out the consumer psychological factors that affect donation satisfaction and continuous donation intention. Design/Methodology/Approach – A questionnaire survey was conducted for Chinese with experience in food bank donations and data was collected. After excluding bad answers and invalid answers;371 responses were obtained. In order to verify the research hypothesis;this research used structural equation path analysis and hierarchical multiple regression analysis. Findings – Altruistic motivation was found to have no effect on Chinese satisfaction with donations to food banks;while egoistic motivation showed a significant negative impact. The impact of unplanned impulsivity and evaluation sensitivity impulsivity on Chinese donation satisfaction to food banks is significant;but the impact of reward sensitivity impulsivity is not significant. Perspective-taking and empathic concern in consumer empathy have a significant impact on the satisfaction of Chinese donations to food banks. Finally;Chinese satisfaction with donations to food banks was found to have a significant impact on the intention of continuing donations;and only independent self-construal was found to have a moderating effect. Research Implications – This is the first empirical study conducted in the field of food banking in China;combined with consumer psychological factors;and has important academic significance. It also provides valuable references for China’s charitable donations;food distribution industry;and provides new reference ideas for China’s “saving food”.

Combined analysis of stiffness and fatigue life of deep groove ball bearings under interference fits, preloads and tilting moments

Yi Jiang,Tianyu Zhu,Song Deng 대한기계학회 2023 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.37 No.2

The stiffness and fatigue life of deep groove ball bearings are greatly affected by interference fits, preloads and tilting moments. Up to now, most of current works failed to focus on the integrated analysis of stiffness and fatigue life, especially the off-diagonal stiffness items in the bearing stiffness matrix. This paper proposed an improved mathematical model of deep groove ball bearings with the consideration of interference fits and tilting moments. On this basis, the combined study on stiffness and fatigue life is conducted to determine the optimal match of interference fits, preloads and tilting moments. Moreover, the variations in off-diagonal stiffness items under different interference fits, preloads and tilting moments are also given. These results are beneficial for the assembly of deep groove ball bearings to obtain the best stiffness and fatigue life. Also, the sensitivity of off-diagonal stiffness items to interference fits, preloads and tilting moments is demonstrated, which greatly affects the dynamic characteristic of ball bearings.

Porous Nano-Ni/Graphene/Loofah Composites for Electromagnetic Interference Shielding

Yi Jiang,Mingwei Liang,Weijing Wang,Xuefei Lai,Kenan Xie,Li Liao,Qin Long 한국정밀공학회 2022 International Journal of Precision Engineering and Vol.9 No.4

The urgent requirement of materials with superior electromagnetic shielding properties has been aroused for alleviating electromagnetic pollution. Now, some natural materials such as silkworm cocoon, walnut shell, and so on are gradually used to prepare the electromagnetic interference shielding composites. However, loofah sponges with unique and inherent 3D hierarchical porous structure, which could be obtained from food waste and the wilted loofah, are ignored. In this work, loofah sponges were modified by NaOH and H2 O2 . Then the carbonized modified Loofah/Ni nanoparticles/Graphene composites were prepared by immersion and thermal reduction. Meanwhile, the composites had inherited advantages from natural materials such as low density, porous structure and eco-friendly. As the result of loading of Ni nanoparticles and graphene on the loofah, the outstanding performance was achieved that the shielding effectiveness was raised to 57 dB, and the specific shielding effectiveness was raised to 616.8 dB cm 3 /g. This result demonstrated that composites materials based on natural loofah sponges show tremendous potential for electromagnetic shielding.

Experimental research on preparation and machining performance of porous electrode in electrical discharge machining

Yi Jiang,Linglei Kong,Jianfeng Yu,Chunjian Hua,Wansheng Zhao 대한기계학회 2022 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.36 No.12

The present describes a porous electrode for electrical discharge machining (EDM) that can decrease the concentration of corrosion products in the discharge gap. The electrode is prepared by high-temperature sintering of copper particles. A large number of red copper particles become connected together through sintering necks to form a structure with a large number of pores that act as flushing channels. By exploring the preparation method, material, sintering temperature, and holding time, a porous electrode is prepared such that copper particles do not fall off during the discharge process. The flow of the flushing medium is simulated in the porous electrode, and the action of the flushing flow field in the discharge gap on erosion products is identified. In agreement with the simulation results, experimental results for the EDM of the titanium alloy Ti6Al4V show that the material removal rate with a porous electrode is 3 times higher than that for traditional EDM with a solid electrode. Moreover, the electrode wear is lower due to the effective discharge of the corrosion products by the flushing liquid. Experimental results when rough machining a complex semi-closed cavity show that the porous electrode can greatly shorten the machining time by 47 %, which demonstrates that a porous electrode improves the machining of a complex cavity in a titanium alloy.

Adaptive control for small-hole EDM process with wavelet transform detecting method

Yi Jiang,Wansheng Zhao,Xuecheng Xi,Lin Gu 대한기계학회 2012 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.26 No.6

To achieve an efficient small-hole EDM process, an accurate pulse monitoring strategy and a precise control are both required. In order to improve the efficiency and stability of the small-hole drilling process, an adaptive control system with a self-tuning regulator is developed. A high-speed EDM pulses monitoring system based on wavelet transform is implemented to measure the gap status, whose output is adopted as the feedback signals of the adaptive control system. The discharge waveforms are recorded and analyzed. The experimental results demonstrate that the arc pulse ratio during small-hole drilling process is reduced remarkably. The machining efficiency as well as the machining quality is improved significantly.

Stock Return, Volume and Volatility in the EGARCH model

( Yi Jiang ) 보험연구원 2020 보험금융연구 Vol.31 No.1

I use EGARCH model to study the asymmetric impact of negative and positive shocks on stock return volatility. I find the asymmetric effects exist and the impact on volatility of a negative shock is greater than that of a positive shock. Furthermore, I examine the dynamic relationship between returns, volume and volatility of stock index by introducing trading volume as an exogenous variable into the EGARCH model. The results indicate that trading volume contributes some information to the returns processes of stock indexes. However, the persistence of volatility remains even after incorporating lagged volume effects, which are proxies for information flow. Granger causality tests demonstrate stronger evidence of returns causing volume than volume causing returns.

Comparison of Creep Fracture Behavior Between Selective Laser Melted and Forged Alloy 230 After Testing at 1200 °C

Yijiang Zeng,Yu Pan,Ning Wang,Jian Chen,Xianhui Cai 대한금속·재료학회 2023 METALS AND MATERIALS International Vol.29 No.5

The creep fracture behavior between selective laser melted (SLMed) and forged alloy 230 after testing at 1200 °C under differentapplied stresses was compared. The results showed that both the creep behavior of SLMed and forged alloy 230 followedthe power law and obeyed the Monkman–Grant relation. The SLMed samples parallel to the building direction exhibitedsuperior creep resistance than those perpendicular to the building direction, and the forged samples were in between, whilethey all exhibited poor creep ductility compared with that of the forged samples. Furthermore, the relations of applied stressand maximum allowable creep lifetime could be built to evaluate the creep resistance of the alloys. The SLMed samplesparallel to the building direction showed discrete trans/intergranular cracks, while those perpendicular to the building directionand forged materials depicted continuous and discrete intergranular cracks, respectively. Furthermore, the creep fracturemodes at different loadings were revealed by correlating the creep damage tolerance factor with the fractured microstructure. In addition, the effects of the initial microstructure characteristics, such as grain morphology, grain boundaries, grain size,internal defects and precipitates, on the creep strength and life at high temperatures were presented and analyzed.

The Disign of CMOS Integrated Acceleration Detection Circuit System

Yijiang Cao,Jiamu Cao,Zhefei Wang,Shan Li 보안공학연구지원센터 2013 International Journal of Smart Home Vol.7 No.5

Analysis of plane frame structure using base force element method

Yijiang Peng,Yaqiong Bai,Qing Guo 국제구조공학회 2017 Structural Engineering and Mechanics, An Int'l Jou Vol.62 No.1

The base force element method (BFEM) is a new finite element method. In this paper, a degenerated 4-mid-node plane element from concave polygonal element of BFEM was proposed. The performance of this quadrilateral element with 4 mid-edge nodes in the BFEM on complementary energy principle is studied. Four examples of linear elastic analysis for plane frame structure are presented. The influence of aspect ratio of the element is analyzed. The feasibility of the 4 mid-edge node element model of BFEM on complementary energy principles researched for plane frame problems. The results using the BFEM are compared with corresponding analytical solutions and those obtained from the standard displacement finite element method. It is revealed that the BFEM has better performance compared to the displacement model in the case of large aspect ratio.

Monitoring for Damage in Two-Dimensional Pre-Stress Scratching of SiC Ceramics

Gaofeng Zhang,Yijiang Zeng,Wenbo Zhang,Houming Zhou,Zhangya Wen,Yuan Yao 한국정밀공학회 2016 International Journal of Precision Engineering and Vol.17 No.11

This paper reports an approach to use the acoustic emission (AE) technology for monitoring the surface/subsurface damage in twodimensional pre-stress scratching of SiC ceramics, in which the two-dimensional pre-stress is used to decrease the scratch-induced damage. Experiments in this study were conducted on a UMT-2 machine (CETR USA) utilizing a designed pre-stressing device under pressures of 0 MPa, 300 MPa and 500 MPa. The experimental results demonstrate that average frequency and magnitude of AE signals have a good correlation with the scratching tangential force and the scratch-induced surface /subsurface damage of materials. For a given normal load, the average frequency and magnitude of AE signals are observed to decrease with the increase in pre-stress, which indicates that surface/subsurface damage of SiC ceramics induced by two-dimensional pre-stress scratching is less than that induced by conventional scratching. The findings provide fundamental information for developing a practical on-line AE monitoring system that is effective in detecting surface/subsurface damage in scratching or grinding of ceramics. These results also demonstrate that two-dimensional pre-stress method contributes to decreasing the machining damage of brittle materials.