基于智能手机平台的景区游客时空分流体系构建研究

国内众多景区以其品牌的高知名度和独具特色的景观资源,吸引了众多的国内外游客前往参观,导致景区内旅游高峰期出现严重的客流拥堵现象,因此旅游旺季景区游客的控制和调节成为景区亟待解决的重大问题。文章从智慧景区视角,在分析国内景区游客分布总体特征的基础上,构建了基于智能手机平台的景区游客时空分流体系,并对该体系的分流理念、运行机制、分流功能的实现路径等进行了详细阐述,最后,文章指出了该体系对传统景区旅游服务系统的提升优化作用。       

智慧城市框架下图书馆服务模式构建研究

图书馆应主动融入智慧城市建设,为智慧经济、智慧管理、智慧生活和智慧人群等智慧城市建设中的一些要素提供信息服务支撑。图书馆建设应立足于智慧城市的总体框架,依托智能技术、打造智慧服务空间和信息服务平台。通过图书馆信息服务平台及体系,构建以云图书馆为中心,虚拟服务平台、实体图书馆和自助终端设备为依托的图书馆服务新模式。     

裂缝天线缝制造精度对电性能影响的预测

为了避免传统方法在分析结构因素对电性能影响时需要假设和近似处理的弊端,提出了根据平板裂缝天线生产制造中的数据,使用支持向量回归建立缝制造精度对电性能指标影响的预测方法。给出了一种以最小化支持向量回归的拟合能力和泛化能力为目标函数来选择支持向量回归机参数的方法,以方便该方法的工程应用。案例研究表明,该方法能够较准确地预测缝制造精度对电性能的影响;与传统的BP神经网络和最小二乘法对比,该方法具有更好的泛化能力,可以应用到平板裂缝天线的计算机辅助制造中。     

A reference activity model for smart factory design and improvement

Smart manufacturing systems (SMSs) are envisioned to contain highly automated and IT-driven production systems. To address the complexity that arises in such systems, a standard and holistic model for describing its activities and their interrelationships is needed. This paper introduces a factory design and improvement (FDI) activity model and illustrates a case study of FDI in an electromechanical component factory. In essence, FDI is a reference activity model that encompasses a range of manufacturing system activities for designing and improving a factory during its initial development and also its operational phases. The FDI model shows not only the dependency between activities and manufacturing control levels but also the pieces of information and software functions each activity relies on. We envision that the availability of these pieces of information in digital form to integrate across the software functions will increase the agility of factory design and improvement projects. Therefore, our future work lies in contributing to standards for exchanging such information.     

如何提高巧实力和整体外交能力——基于机会成本和边际效应的视角

国际政治中对于权力内涵的认识是一个不断演进的过程,从国家实力到硬实力、软实力,再到巧实力。这不仅反映了国际体系的变化和发展,也意味着一国整体外交能力建设应该不断纳入新的因素。但如何优化组合这些因素,以提升一国的巧实力和整体外交能力,目前尚缺乏明确的原则。经济学中的机会成本和边际效应,包括消费的边际效用递减效应和生产要素投入边际产出递减效应等视角,可以在确定外部挑战和机遇、加强整体外交能力的软硬实力基础,以及提升巧实力方面发挥重要指导作用。     

Healthcare 4.0: trends,challenges and research directions

Abstract

This paper aims at examining the trends, challenges and theoretical gaps in the implementation of Healthcare 4.0 (H4.0) based on a scoping review of the literature. For that, we searched journal articles in four widely known databases and screened the retrieved articles to obtain a publications’ portfolio. Our findings indicate that, despite the recency of the subject, research in H4.0 has been conducted in an interdisciplinary way with a diversified set of applications and functionalities. In terms of its implementation, H4.0 has been more commonly found in hospitals’ information flows, especially the ones related to healthcare treatments. The identified implementation trends, however, neglect a more holistic approach for H4.0, which originated three main research directions for this topic. Although identified as a trending topic in the area of healthcare operations management, literature on H4.0 may be viewed as randomly conceived, lacking academic alignment and practical orientation based on a grounded theory, which we aim at providing with the present study.     

电磁导弹的波瓣特性

首次在球坐标系统下研究了电磁导弹有趣的波瓣特性。研究表明:当天线口径、距离一定时,电磁导弹的波瓣随波形参量减小而变窄;当天线口径、波形参量一定时,电磁导弹的波瓣随距离增加而变窄;当波形参量、距离一定时,电磁导弹的波瓣随天线口径增加而变宽;电磁导弹不存在副瓣;电磁导弹的能量在远轴时仍按球面波方式衰减。这些结论有助于理解电磁导弹的实质。     

高速SOI-LIGBT的数值分析

研制出Ｈｅ离子注入局域寿命控制ＳＯＩ横向绝缘栅双极晶体管（ＳＯＩ－ＬＩＧＢＴ），有效地提高了器件的关断速度，且与集成电路工艺相兼容。数值模拟表明，该器件的t_f～V_F折衷关系优于采用非局域寿命控制的器件，在相同关断速度下其正向压降可降低０．６～１．４ Ｖ，避免了阳极短路结构的正向快速返回现象。     

使用双线性对构造的智能卡口令认证方案

研究了双线性对在智能卡口令认证方案中的应用;针对Girietal方案在敌手能够获取存储在智能卡中信息的情况下不能抵抗冒充攻击的安全缺陷,提出了一种使用双线性对构造的智能卡口令认证方案。在该方案的登录阶段中只是执行群上的加法运算,没有使用杂凑函数和公钥加解密操作,因而计算代价更低,但却提供了更好的安全性,能够抵抗重放攻击、离线攻击和冒充攻击。     

Planners' Perspectives on Obstacles to Sustainable Urban Development: Implications for Transformative Planning Strategies

A major problem confronting planning is the gap between transformative proposals and enduring urban development trends. The paper interprets interviews with 62 planners involved in a sustainable urban development strategy in a large region focussed on Toronto, Canada. Surveyed planners were asked about the obstacles they encounter when attempting to modify prevailing urban development. Mentioned obstacles are consistent with expectations arising from three major perspectives on inertia: institutionalism, political economy and path dependence. Interviews also highlight the role of planners' practical knowledge in identifying and interpreting obstacles, and the existence of a consensus among respondents over sustainable urban development.