兰州大学机构库

Browse/Search Results:  1-10 of 258 Help

  Show only claimed items
Selected(0)Clear Items/Page:    Sort:
Performance of the Secondary Electrons Profile Monitor for the scanning gantry in the Heavy Ion Medical Machine 期刊论文
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2021, 卷号: 999
Authors:  Liu, Tong;  Mao, Ruishi;  Yuan, Youjin;  Huang, Chuan;  Yao, Liping;  Yao, Ze'en;  Xu, Zhiguo;  Li, Peng;  Feng, Yongchun;  You, Yaoyao...Liu, Tong;  Mao, Ruishi;  Yuan, Youjin;  Huang, Chuan;  Yao, Liping;  Yao, Ze'en;  Xu, Zhiguo;  Li, Peng;  Feng, Yongchun;  You, Yaoyao;  Yang, Herun;  Duan, Limin;  She, Qianshun;  Kang, Xincai;  Ding, Jiajian;  Lu, Ziwei;  Li, Juan;  Chen, Yucong;  Li, Shengpeng;  Li, Min;  Liu, Xiaotao;  Ren, Hang;  He, Peilin
Favorite  |  View/Download:0/0  |  Submit date:2021/04/16
Electrons  Heavy ions  Image storage tubes  Microchannels  Sensitivity analysis  Signal to noise ratio  Beam monitor  Beam positions  Beam profiles  Beam size  Electron profile  Heavy ion medical machine  Micro channel plate  Profile monitor  Secondary electron profile monitor  Secondary electrons  
Does e-shopping for intangible services attenuate the effect of spatial attributes on travel distance and duration? 会议论文
Transportation Research Part A: Policy and Practice
Authors:  Shi, Kunbo;  De Vos, Jonas;  Yang, Yongchun;  Li, Enlong;  Witlox, Frank
Favorite  |  View/Download:3/0  |  Submit date:2020/12/17
PurchasingBeijing , China  E-shoppers  Face-to-face interview  Online shopping  Search spaces  Spatial attribute  Travel distance  
Does e-shopping for intangible services attenuate the effect of spatial attributes on travel distance and duration? 期刊论文
TRANSPORTATION RESEARCH PART A-POLICY AND PRACTICE, 2020, 卷号: 141, 页码: 86-97
Authors:  Shi, Kunbo;  De Vos, Jonas;  Yang, YC(杨永春);  Li, Enlong;  Witlox, Frank
Favorite  |  View/Download:3/0  |  Submit date:2020/12/18
Spatial attributes  Online shopping  Intangible services  Travel distance  Travel duration  China  
How does purchasing intangible services online influence the travel to consume these services? A focus on a Chinese context 期刊论文
TRANSPORTATION, 2020
Authors:  Shi, Kunbo;  Cheng, Long;  De Vos, Jonas;  Yang, YC(杨永春);  Cao, Wanpeng;  Witlox, Frank
Favorite  |  View/Download:4/0  |  Submit date:2020/12/18
ICT  Online purchases  Intangible services  Travel distance  Travel mode choice  China  
西宁市开发区企业的供应销售物流网络结构特征 期刊论文
经济地理, 2020, 卷号: 40, 期号: 3, 页码: 129-140
Authors:  唐艳;  杨永春;  程仕瀚
Favorite  |  View/Download:5/0  |  Submit date:2020/10/10
开发区企业  供应销售物流  结构特征  社会网络分析  地方化  非全球化  工业园区  
基于耦合协调度模型的河西走廊生态环境质量时空格局演化 期刊论文
中国人口.资源与环境, 2020, 卷号: 30, 期号: 1, 页码: 102-112
Authors:  杨亮洁;  杨海楠;  杨永春;  魏伟;  潘竟虎
Favorite  |  View/Download:13/0  |  Submit date:2020/10/10
生态环境质量  环境承载力  生态弹性限度  耦合协调模型  河西走廊  
西宁市开发区企业的供应销售物流网络结构特征 期刊论文
经济地理, 2020, 卷号: 40, 期号: 3, 页码: 129-140
Authors:  唐艳;  杨永春;  程仕瀚
Favorite  |  View/Download:13/0  |  Submit date:2020/06/15
开发区企业  供应销售物流  结构特征  社会网络分析  地方化  非全球化  工业园区  
黄河上游生态保护与高质量发展的基本逻辑及关键对策 期刊论文
经济地理, 2020, 卷号: 40, 期号: 6, 页码: 9-20
Authors:  杨永春;  张旭东;  穆焱杰;  张薇
Favorite  |  View/Download:50/0  |  Submit date:2020/10/10
黄河上游  生态保护  高质量发展  绿色产业  重工业基地  流域管理  协同发展  
基于耦合协调度模型的河西走廊生态环境质量时空格局演化 期刊论文
中国人口·资源与环境, 2020, 卷号: 30, 期号: 1, 页码: 102-112
Authors:  杨亮洁;  杨海楠;  杨永春;  魏伟;  潘竟虎
Favorite  |  View/Download:22/0  |  Submit date:2020/06/12
生态环境质量  环境承载力  生态弹性限度  耦合协调模型  河西走廊  
黄河流域高质量发展的基本条件与核心策略 期刊论文
资源科学, 2020, 卷号: 42, 期号: 3, 页码: 409-423
Authors:  杨永春;  穆焱杰;  张薇
Favorite  |  View/Download:2/0  |  Submit date:2020/10/10
黄河流域  高质量发展  基本条件  核心策略  中心城市  城镇群