排序方式: 共有30条查询结果,搜索用时 31 毫秒
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从新疆主要景区(点)的出游取向、到游率、美誉度、竞争态等角度分析,新疆旅游布局重点与游客需求之间存在矛盾.新疆在近期内旅游开发的重点仍需放在天山天池风景名胜区、吐鲁番古迹文化名胜区、喀纳斯风景名胜区、帕米尔高原风景线、楼兰古迹探险区和罗布泊风景区. 相似文献
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引入职业高原理论,通过对民营零售企业员工的问卷调查,构建民营企业零售员工职业高原维度,分析职业高原与离职倾向的关系并提出相应的对策建议,从而帮助民营零售企业更好规划员工职业生涯,关注员工可能遭遇的职业高原现象,实现企业的可持续发展. 相似文献
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Jaehyun So Nassim Motamedidehkordi Yingjie Wu Fritz Busch Keechoo Choi 《International Journal of Sustainable Transportation》2018,12(4):286-298
This study proposes an integrated simulation approach, which consists of a microscopic traffic simulation model, a vehicle dynamics model, and an emission estimation model, in order to estimate emissions based on more reliable vehicle performance measures. The vehicle performance measures such as engine power and engine speed significantly relate to the amount of emissions, and road curvatures and inclinations are the core inputs affecting these vehicle performance measures. Therefore, providing reliable vehicle performance measures reflecting the road geometric attributes is critical for a reliable emission estimation. This study proposes to use the microscopic traffic simulation model for generating vehicle trajectories, which is advantageous in modeling various traffic situations, and the vehicle dynamics model for producing the vehicle performance measures based on the vehicle trajectories. Finally, the outputs from the vehicle dynamics model are fed into the emission estimation model to compute emission measures. This study conducted a case-study using two road sections, one is a hypothesized road section, including various curvatures and inclinations with regular variations, and the other is a Kesselberg road section, which is an actual geometry in Bayern, Germany. The emission measures are estimated in these case-study road sections using both an existing simulation approach and the proposed integrated simulation approach. The difference between these two emission estimation approaches is discussed in terms of the emission measures, including fuel consumption, nitrogen oxides, and particulate matters. 相似文献
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空间政策:由区域倾斜到产业倾斜 总被引:2,自引:0,他引:2
空间政策具有阶段性的特征,区域倾斜为主是空间政策发展的初级阶段,产业倾斜为主是空间政策发展的高级阶段。我国建国以来无论是实施区域均衡发展战略、非均衡发展战略、还是非均衡协调发展战略,都采取了区域倾斜为主的空间政策来进行空间调控。但是,区域倾斜的空间政策存在着效率与公平时空错位、对市场调控机制的损害和区域一刀切的弊端。产业倾斜可实现提高效率、区域公平和环境友好三大目标的统一,是我国今后空间政策的发展取向。主体功能区划将推进区域倾斜和产业倾斜的结合,是由区域倾斜为主向产业倾斜为主的过渡,在我国空间政策转换阶段,应更多运用产业倾斜的政策手段。 相似文献
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五矿己四采区暗斜井锚网喷施工中,引进了钻车打眼加皮带排矸机械化快速施工作业线,优化施工,采用"掘支喷"平行作业,大大提高了施工速度。2010年5月至12月连续8个月取得了月进尺超百米的好成绩,其中最高月进尺153米,实现了大断面斜巷快速施工。 相似文献
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给出了以MSP430F149为核心的帆板控制系统的基本原理与实现方案。该系统由倾角测量模块、电机驱动模块、显示模块、调节模块等组成。采用SCA103T倾角传感器,可实现倾角精确测量;采用直流电机驱动风扇。系统功能由按键控制,可对测量结果进行实时显示,人机交互界面友好,经测试,性能指标优良。 相似文献
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大学生体育锻炼行为取向的研究 总被引:2,自引:0,他引:2
该文采用文献资料与问卷调查法,就大学生体育锻炼的行为取向进行调查分析,提出了学校体育教学上应注重性别的差异和主观倾向性差异、体育教学内容的多样化等,以指导学生的体育锻炼和老师的教学工作,引导学生培养终身参加体育锻炼的习惯. 相似文献