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浅谈立式钢琴的“空动”及其调整
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作者 潘建 《文教资料》 2013年第36期104-105,共2页
立式钢琴手感的调整是钢琴整体调整中的重要环节,其中“空动”是钢琴手感调整中非常重要的方面.本文就钢琴演奏者的个性化需要,对“空动”及其调整方法作了介绍.
关键词 立式钢琴 “空动” 调整方法
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摇头飞椅挠性吊挂件的安全可靠性比对分析
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作者 张宇光 姚俊 蔡昶 《质量与标准化》 2022年第2期41-44,共4页
摇头飞椅挠性吊挂件的常用方式是圆环链或钢丝绳。本文以圆环链和钢丝绳为研究对象,从承载能力、抗挤压和碰撞能力等几个方面对其使用过程中的安全可靠性进行了比对分析,并就如何提高挠性吊挂件在使用过程中的安全可靠性提出了相关建议。
关键词 摇头飞椅 挠性吊挂件 安全可靠性
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The Characteristics and Driving Factors of the Spatio-temporal Dynamic Evolution of Tourism Ecological Security in the Silk Road Economic Belt
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作者 WANG Shu LIU Fenglian +1 位作者 YANG Lei CAI Wei 《Journal of Resources and Ecology》 2024年第4期1054-1067,共14页
The exploration of ecological safety in tourism sites can provide a concrete path for sustainable tourism development in a region.Based on the“Driver-Pressure-State-Impact-Response”(DPSIR)model,we constructed an ind... The exploration of ecological safety in tourism sites can provide a concrete path for sustainable tourism development in a region.Based on the“Driver-Pressure-State-Impact-Response”(DPSIR)model,we constructed an index system for the evaluation of tourism ecological security(TES)in the Silk Road Economic Belt(SREB)from 2005 to 2020.This index system was used to explore the characteristics of spatial and temporal dynamic evolution with the help of entropy weight TOPSIS method,dynamic index of TES and Markov probability transfer matrix,and a standard deviational ellipse(SDE)model and GM(1,1)model were constructed for spatial pattern analysis and prediction.The results indicate four key aspects of this system.(1)In terms of spatiotemporal evolution,the tourism ecological safety index(TESI)of the SREB increased,the TES levels of the northwestern and southwestern provinces and cities differed significantly,and the quality conditions of TES in the southwestern provinces and cities were better than in the northwest.(2)In terms of dynamic evolutionary characteristics,the speed of change at each level of the SREB was slow,but the level of TES has improved.The TES level has not shifted by leaps and bounds,and the shifts in the level type show“path dependence”and“self-locking”effects.(3)In terms of spatial and temporal distribution patterns,the spatial pattern of TES in the SREB is a“northwest-southeast”movement trend,and the spatial distribution appeared as“aggregation”from 2005 to 2020.The prediction results show that the center of gravity of TES in the SREB will shift to the southeast from 2025 to 2035,and the spatial spillover effect will be reduced.(4)In terms of driving factors,the number of star-rated hotels,and the amounts of industrial wastewater emissions,tourism foreign exchange earnings,forest coverage,and other parameters are the key factors affecting TES,and the booming tourism industry requires the interconnection and interpenetration of various factors.The results of this study can provide a reference for tourism development and ecological environmental protection in the Silk Road Economic Belt. 展开更多
关键词 tourism ecological security spatial-temporal evolution drivers Geo-detector the Silk Road Economic Belt
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