基于多源遥感数据的马铃薯收入保险应用研究

目的 研究面向创新型农业保险业务中缺少及时准确的第三方作物产量结果用于灾损理赔的问题。引入多源卫星遥感测产技术,识别测产关键因子,构建产量模型。方法 文章运用多元线性回归分析方法,选取山西省马铃薯主产县岚县为研究区,计算基于Sentinel2影像的植被指数,结合气象卫星数据与实测单产数据,筛选关键因子,建立马铃薯单产遥感测产经验模型。结果 采用GF-2影像分割与Sentinel2长势时序识别岚县马铃薯种植面积为8 477.65hm²,精度检验Kappa值为0.72。保险公司岚县承保马铃薯面积2 476.37hm²,承保覆盖率为29.21%。测产结果显示,马铃薯单产与区域关键期地表温度参数相关性较好,岚县遥感测产获得平均单产为13.76 t/hm²,实地测产获得平均单产为14.06 t/hm²,误差百分比为2.13%,分乡镇平均误差百分比为22.97%,基本满足理赔业务需求。在2018年保险期结束后一周内,保险公司启动快速赔付,支付赔款125.29万元,赔付率48.46%。结论 遥感测产具有大范围、时效性好、可靠性高等特点,能够迅速为创新型保险产品提供测产理赔结果,提高理赔效率,保障农民收入。     

Understanding the Benefit Sought by Rural Tourists and Accommodation Preferences: A South Korea Case

Rural tourism has been widely acknowledged for its effectiveness in contributing to rural areas’ development. With strong government support, rural tourism has developed in many countries during the last several decades. This study aims to improve the understanding regarding tourism in Korean rural areas using a segmentation approach. The responses of 442 tourists in 23 rural villages were analyzed. Four segments of tourists were identified based on the different benefits they sought for their vacation in rural establishments. The estimation of a multinomial logit model determined the socio‐demographic characteristics and the preferred accommodations of a rural tourist. Discussions and implications of the detailed findings are provided in the last section. Copyright © 2012 John Wiley & Sons, Ltd.     

一种新的快速视频图像边缘检测算法

一般常用的边缘检测算法计算量较大，对细小边缘检测效果较差，不适合实时边缘检测系统。针对这一问题，本文提出一种连续分割的快速边缘检测算法：从相互垂直两方向分割梯度图像，提取截面曲线极大值获得图像边缘，使用形态学梯度，检测出细小的图像边缘。实验结果表明此算法较Canny等经典算法减少了计算量，提高了边缘检测精度。     

开放条件下国际资产定价模型的解析与检验

随着经济全球化的不断深入，国际资本市场的一体化程度也在不断加强，敌对国际资产定价问题的探讨显得颇为重要。尤其对开放条件下的国际资产定价理论与实证研究进行系统的梳理与分类，并对该领域现有研究中存在的问题提出未来研究的方向，更有学术价值。     

CFG桩在无碴轨道软基处理中的应用

文章介绍了时速为200km/h的遂(宁)渝(重庆)铁路枢纽无碴轨道软土路基CFG桩处理方法、施工过程、质量控制及效果,对于CFG桩在无碴轨道高速铁路软基处理中的应用有重要参考价值。     

事前与事后市场细分方法的比较研究

随着市场细分研究的深入,细分方法由以定性分析为主的事前细分法逐渐发展到结合定性与定量分析的事后细分法。在实际应用中,事前与事后细分方法都可以应用,但孰优孰劣未知。主要对两种细分方法进行对比分析,探讨两种市场细分方法的细分效果并分析哪种细分方法的效果更佳。     

基于客户关系管理的销售培训研究

借助客户关系管理思想,从“细分”和“技术化”的角度,对销售培训的对象、目标和销售培训计划的制定等内容进行了全面细致的阐述。     

基于模糊聚类的物流市场细分方法探讨

探讨了一种定量的物流市场细分方法,将行业需求特征和客户具体需求特征作为市场细分的依据,运用模糊聚类法细分市场。在此基础上,根据企业自身状况动态调整细分市场的数量和规模,寻找目标市场,为企业战略决策、产品定位和营销提供一定依据。     

Dynamic efficiency assessment of the Chinese hotel industry

The paper introduces for the first time a totally dynamic two-stage approach to analyzing the hotel industry's technical efficiency at the sub-national level. The first stage uses data envelopment window analysis (DEWA) to assess regional hotel sectors' technical efficiency over time. Unlike previous studies, the second stage uses a dynamic Tobit model to investigate the impact of macro contextual factors on the hotel sector efficiency. The study chooses the Chinese hotel industry during the period 2001-2006 as its application setting. The findings of the investigation indicate that the Chinese hotel industry is approaching an efficient operation in general, recovering from a major dip in 2003 resulting from the Severe Acute Respiratory Syndrome (SARS) outbreak. In addition, the study introduces a novel two-dimensional efficiency-based matrix to assess the competitive advantage of different regions of the Chinese hotel sector. The paper presents strategic market implications for hoteliers, government decision-makers, and destination management organizations. The proposed methods are applicable for situations in which an exogenous event of a destabilizing impact (e.g., SARS) does occur.