Taking tourists in Tai'an City—an outstanding tourism city of China for example, this paper explored the influence of online comments(word-of-mouth effect) on tourists' intention of purchasing services of acc...Taking tourists in Tai'an City—an outstanding tourism city of China for example, this paper explored the influence of online comments(word-of-mouth effect) on tourists' intention of purchasing services of accommodation facilities and restaurants through analyzing 502 valid questionnaires. Then measures and suggestions were proposed for tourist enterprises improving online word-of-mouth marketing.展开更多
输电线路覆冰事故在中国冬季时常发生,基于介质损耗与集肤效应的高频融冰方法在发热方面比传统交直流融冰有着显著的优势。针对高频高压在线融冰时电源频率、电压设计问题,提出一种基于NSGA‐Ⅱ的高频在线融冰电源参数的多目标优化设计...输电线路覆冰事故在中国冬季时常发生,基于介质损耗与集肤效应的高频融冰方法在发热方面比传统交直流融冰有着显著的优势。针对高频高压在线融冰时电源频率、电压设计问题,提出一种基于NSGA‐Ⅱ的高频在线融冰电源参数的多目标优化设计方法。首先,基于均匀传输线理论,建立了高频激励下的覆冰导线的等效传输线电路模型;其次,从工程实际出发,结合高频在线融冰的热平衡原理,推导得到高频在线融冰目标函数及约束条件;再次,通过NSGA‐Ⅱ算法求解得到该多目标问题的Pareto最优解集,并根据优劣解距离法(technique for order preference by similarity to an ideal solution,TOPSIS)法选择融冰电源参数;最后,利用COMSOL软件,基于有限元方法进行仿真验证。仿真结果验证该文融冰模型的正确性及所选参数的有效性。展开更多
基金Sponsored by Young Backbone Teachers and Domestic Visiting Scholar Program of Shandong Provincial Institutes of Higher EducationShandong Provincial Program of Soft Sciences(2009RKB439)+1 种基金Shandong Provincial Key Project of Culture and Art(2013101)Sci-tech Development Program of Tai’an Bureau of Science and Technology(20140630-20)
文摘Taking tourists in Tai'an City—an outstanding tourism city of China for example, this paper explored the influence of online comments(word-of-mouth effect) on tourists' intention of purchasing services of accommodation facilities and restaurants through analyzing 502 valid questionnaires. Then measures and suggestions were proposed for tourist enterprises improving online word-of-mouth marketing.
文摘输电线路覆冰事故在中国冬季时常发生,基于介质损耗与集肤效应的高频融冰方法在发热方面比传统交直流融冰有着显著的优势。针对高频高压在线融冰时电源频率、电压设计问题,提出一种基于NSGA‐Ⅱ的高频在线融冰电源参数的多目标优化设计方法。首先,基于均匀传输线理论,建立了高频激励下的覆冰导线的等效传输线电路模型;其次,从工程实际出发,结合高频在线融冰的热平衡原理,推导得到高频在线融冰目标函数及约束条件;再次,通过NSGA‐Ⅱ算法求解得到该多目标问题的Pareto最优解集,并根据优劣解距离法(technique for order preference by similarity to an ideal solution,TOPSIS)法选择融冰电源参数;最后,利用COMSOL软件,基于有限元方法进行仿真验证。仿真结果验证该文融冰模型的正确性及所选参数的有效性。