With the arrival of the ＂two child era＂ in China, preschool educa tion has become an even more difficult issue for many Chineseparents. According to the research result of Education Policy Center of Southwest Univer...With the arrival of the ＂two child era＂ in China, preschool educa tion has become an even more difficult issue for many Chineseparents. According to the research result of Education Policy Center of Southwest University, with China＇s implementation of the two child policy in 2016, the demand for preschool education will see a sharp increase from 2019 and reach its peak in 2021.展开更多
E-business develops rapidly and attracts a large number of merchants and consumers in the past 20 years.Meanwhile,the debate over e-business mode and its critical success factors(CSFs)is a research hotspot in the indu...E-business develops rapidly and attracts a large number of merchants and consumers in the past 20 years.Meanwhile,the debate over e-business mode and its critical success factors(CSFs)is a research hotspot in the industry and the academia.In this study,we propose the CSFs framework of self-run e-business by combining systematic literature review,resource orchestration theory,and empirical firm survey.The quantitative method of content analysis is targeted at the interview data received from 90 managers of JD.com by software NVivo 11.We construct a self-run e-business CSFs framework and find out that the CSFs of self-run e-business are products,organization,and supply chain,respectively.In addition,this study compares different characteristics and their impact on performance in platform-type and self-run e-businesses.Firm managers can derive a better understanding and measurement of e-business activities.展开更多
文摘With the arrival of the ＂two child era＂ in China, preschool educa tion has become an even more difficult issue for many Chineseparents. According to the research result of Education Policy Center of Southwest University, with China＇s implementation of the two child policy in 2016, the demand for preschool education will see a sharp increase from 2019 and reach its peak in 2021.
基金supported in part by the National Natural Science Foundation of China(2020187)the China Futures Association 17th Joint Research Project(2024370050)+1 种基金the Jinling Institute of Technology High-level Talent Research Fund Project(JIT-B-202404)the Anhui Huishang Futures Technology Center Incubation Project(HSQHBSHZ2023-02).
文摘E-business develops rapidly and attracts a large number of merchants and consumers in the past 20 years.Meanwhile,the debate over e-business mode and its critical success factors(CSFs)is a research hotspot in the industry and the academia.In this study,we propose the CSFs framework of self-run e-business by combining systematic literature review,resource orchestration theory,and empirical firm survey.The quantitative method of content analysis is targeted at the interview data received from 90 managers of JD.com by software NVivo 11.We construct a self-run e-business CSFs framework and find out that the CSFs of self-run e-business are products,organization,and supply chain,respectively.In addition,this study compares different characteristics and their impact on performance in platform-type and self-run e-businesses.Firm managers can derive a better understanding and measurement of e-business activities.
文摘建立了某型自行火炮虚拟样机模型,仿真并获得了各典型行驶工况下行动系统关重件的载荷时间历程。以扭力轴为研究对象,对各单-工况下的二维随机扭矩载荷进行计数统计和分布检验,采用权系数法、概率密度推断法和最速下降法对载荷进行多工况的合成和扩展,获得了其全寿命里程二维设计谱。并通过有限元分析和名义应力法,运用MM(modified miner)法则和EM(elemental miner)法则对扭力轴进行材料疲劳特性修正和安全寿命预测,结果表明:MM法则更为合理一些,并认为扭力轴不萌生宏观裂纹的疲劳寿命为12814 km.
