网络口碑对患者就医选择的影响——基于在线医生评论的实证研究

随着互联网技术的蓬勃发展,网络口碑在电影、图书和餐饮等传统消费领域对消费者行为的影响越来越大.但是,目前学术界对网络口碑如何影响患者就医选择的相关研究还相对较少.本文利用第三方平台"好大夫在线"的互联网医疗服务数据,实证研究了网络口碑对患者就医选择的影响,并尝试探究产品卷入度在网络口碑与就医选择之间的调节作用.面板数据固定效应模型的估计结果表明,在线评论数量对医生电话咨询服务量和预约挂号量有显著正向影响,负面评论比例对医生电话咨询服务量和预约挂号量有显著负向影响且影响程度大于正面评论比例.同时,网络口碑对预约挂号服务量的影响大于对电话咨询服务量的影响,为产品卷入度的正向调节作用提供间接证据.与已有文献的结果对比发现,网络口碑在信息不对称程度较高的互联网医疗领域对消费者选择的影响程度更高.以上结果对完善医疗质量信息披露、优化互联网医疗平台设计具有启示意义.     

Revenue Management of Reusable Resources with Advanced Reservations

We consider a revenue management problem wherein the seller is endowed with a single type resource with a finite capacity and the resource can be repeatedly used to serve customers. There are multiple classes of customers arriving according to a multi‐class Poisson process. Each customer, upon arrival, submits a service request that specifies his service start time and end time. Our model allows customer advanced reservation times and services times in each class to be arbitrarily distributed and correlated. Upon arrival of each customer, the seller must instantaneously decide whether to accept this customer's service request. A customer whose request is denied leaves the system. A customer whose request is accepted is allocated with a specific item of the resource at his service start time. The resource unit occupied by a customer becomes available to other customers after serving this customer. The seller aims to design an admission control policy that maximizes her expected long‐run average revenue. We propose a policy called the ε‐perturbation class selection policy (ε‐CSP), based on the optimal solution in the fluid setting wherein customers are infinitesimal and customer arrival processes are deterministic, under the restriction that the seller can utilize at most (1 − ε) of her capacity for any ε ∈ (0, 1). We prove that the ε‐CSP is near‐optimal. More precisely, we develop an upper bound of the performance loss of the ε‐CSP relative to the seller's optimal revenue, and show that it converges to zero with a square‐root convergence rate in the asymptotic regime wherein the arrival rates and the capacity grow up proportionally and the capacity buffer level ε decays to zero.     

Cultural differences in maternal emotion control values and children's expressive flexibility

Expressive flexibility is the ability to express or suppress one's emotions to meet the demands of the situation. Recent work suggests that expressive flexibility is associated with better adjustment. However, few studies have focused on expressive flexibility in children. In addition, there is a dearth of research on possible correlates, such as culture, parental emotion socialization, and socioeconomic status, that may be associated with expressive flexibility competencies in children. The purpose of this study was to investigate cultural differences in children's expressive flexibility, maternal emotion control values (ECVs), and their relations to family socioeconomic status (SES) during middle childhood in a sample of European American (N = 31, M age = 9.61 years; 54.8% males), Korean American (N = 38, M age = 9.16 years; 55.3% males) and South Korean children (N = 77, M age = 9.74 years; 51.9% males). Mothers reported on demographics and their emotion control values. Children's expressive flexibility ability was assessed using a lab-based observational measure. Multivariate analyses of covariance controlling for SES, child age, and gender suggested significant cultural differences in expressive flexibility, with the U.S. children (both European and Korean Americans) scoring higher on expressive flexibility compared to their South Korean counterparts. Results also suggested significant cultural differences regarding maternal ECVs; Korean Americans were more similar to South Koreans, both scoring higher on ECVs than European Americans. Socioeconomic status, but not maternal ECVs, were associated with children's expressive flexibility, independent of child age, sex, and culture.     

Develop a public response model of soundscape for urban landscape garden parks

Urban Ecosystems - Developing a public response model of soundscape in parks can provide a basis for the optimization of soundscape design. Three representative urban landscape garden parks were...     

非良基公理和非良基集合论的域

正则互模拟是非良基公理和非良基集合论形成的基础，基于正则互模拟形成了一簇非良基公理。定义了三种正则互模拟≌*、≌t和≡V0，由它们生成的非良基公理AFA≌*、AFA≌t和AFA≡V0与经典的非良基公理FAFA、SAFA和AFA分别等价；非良基公理FAFA和AFA位于非良基公理簇的两端，SAFA处于FAFA和AFA之间；非良基公理FAFA、SAFA和AFA两两不相容；与非良基公理FAFA、SAFA、AFA相对应的外延力依次增强，而相对应的非良基集合论的域依次缩小。     

数字地球及其在知识经济中的地位和作用

数字地球是从更高的层次、系统论和一体化的角度来整合、应用已有的或者正在发展的理论、技术、数据和能力 ,它把遥感技术、地球信息系统和网络技术与可持续发展等社会需要联系在一起 ,为全球信息化提供一个基础框架 ,它的提出及实现具有重大意义。众所周知 ,人类社会正以前所未有的速度发展 ,一个以知识资源的占有、配置、生产、分配和使用为最重要因素的新经济时代已经来临 ,用数字化手段统一处理地球问题 ,最大限度超时空地利用信息资源是促进知识创新的源动力和主要技术依托 ,因此实现数字地球对未来以知识经济为主体的经济建设具有重大的作用     

论学术论文的审美批评

学术论文的美包括两个方面：一是学术论文的主题美；二是学术论文的形式美。因此，对学术论文的审美批评也有两方面，一是对文稿主题的审美批评；二是对文稿表现形式的审美批评。学术论文主题的真实性和新颖性是学术论文的主题美；学术论文结构的严谨性、取材的真实性、语言的流畅性是学术论文的形式美。学术论文的主题美和形式美是不可分割的，它们必须是一个统一的有机体，它们的有机结合便是学术论文审美表现的基本原则。