国外高产梳棉机除杂方式剖析

就国外高产梳棉机在清除棉结和杂质方面的技术措施做了较详细的讨论。作者认为,国内外在这方面研究还很不够,今后需进一步加强,以赶上世界梳棉机发展之潮流。     

影响胶球清洗装置收球率的因素分析

分析了影响凝汽器股球清洗装置收球率的因素,指出可靠的收球率是凝汽器长期、稳定运行的保证。     

装球室加装逆止门方案探讨

介绍了胶球清洗装置中装球室加装逆止门前后设备运行程序及控制对象的变化,阐述了该方案的实现过程并提出了在装球室上加装逆止门的具体方案。     

The World Wide Web as Enabling Technology for CSCW: The Case of BSCW

Despite the growth of interest in the field of CSCW,and the increasingly large number of systems whichhave been developed, it is still the case that fewsystems have been adopted for widespread use. This isparticularly true for widely-dispersed, cross-organisational working groups where problems ofheterogeneity in computing hardware and softwareenvironments inhibit the deployment of CSCWtechnologies. With a lightweight and extensibleclient-server architecture, client implementations forall popular computing platforms, and an existing userbase numbered in millions, the World Wide Web offersgreat potential in solving some of these problems toprovide an enabling technology for CSCWapplications. We illustrate this potential using ourwork with the BSCW shared workspace system – anextension to the Web architecture which provides basicfacilities for collaborative information sharing fromunmodified Web browsers. We conclude that despitelimitations in the range of applications which can bedirectly supported, building on the strengths of theWeb can give significant benefits in easing thedevelopment and deployment of CSCW applications.     

Removal of Microparticles by Ciliated Surfaces—an Experimental Study

Biological cilia are versatile hair‐like organelles that are very efficient in manipulating particles for, e.g., feeding, antifouling, and cell transport. Inspired by the versatility of cilia, this paper experimentally demonstrates active particle‐removal by self‐cleaning surfaces that are fully or partially covered with micromolded magnetic artificial cilia (MAC). Actuated by a rotating magnet, the MAC can perform a tilted conical motion, which leads to the removal of spherical particles of different sizes in water, as well as irregular‐shaped sand grains both in water and in air. These findings can contribute to the development of novel particulate manipulation and self‐cleaning/antifouling surfaces, which can be applied, e.g., to prevent fouling of (bio)sensors in lab‐on‐a‐chip devices, and to prevent biofouling of submerged surfaces such as marine sensors and water quality analyzers.     

科技政策库的系统集成与建设

为了满足科技政策研究需要,中国科协设计并实现了一种科技政策库系统.本文首先介绍了科技政策库的总体设计方案、系统工作流程;然后详细介绍了系统组成,整个系统由数据采集子系统、数据清洗子系统、数据分析子系统3个子系统组成.数据采集子系统基于网络爬虫框架Scrapy软件针对大量异构站点设计了可管理的网络爬虫,并基于ABBYY FineReader软件（俄罗斯软件公司ABBYY发行的一款文档识别软件）实现了历史文献OCR识别（Optical Character Recognition,光学字符识别）和入库.数据清洗子系统基于机器学习算法实现了数据去重、非相关数据识别、数据属性缺陷识别等功能.数据分析子系统则对有效入库的科技政策进一步进行了文本分类、关联关系分析、全文检索.从2018年10月上线以来,该系统从226个数据源采集564 749条数据,经过数据清洗之后入库404 083条数据,能够有力地支撑科技政策研究工作.     

太赫兹通信关键技术与发展愿景

6G研究已启动,太赫兹通信技术以其支持超大带宽资源和超高通信速率等技术特点成为未来6G愿景实现的关键候选技术。从太赫兹通信技术特点出发,讨论了太赫兹通信未来可能的应用场景,系统分析了太赫兹通信的关键技术方向、产业发展现状与面临挑战,最后提出了未来太赫兹通信技术的目标愿景与发展建议。     

基于改进动态窗口法的户外清扫机器人局部路径规划

针对清扫机器人在停车场结构化路面下存在的加速度过大、路径偏离全局路径过大等问题,提出了一种改进的动态窗口法（DWA）．首先,为了限制小车加速度的范围,对DWA速度空间的动力学约束进行优化,避免出现过大的加速度导致轮胎垂直载荷过小的状况．然后,基于激光里程计对轨迹推算环节进行实时误差补偿,解决停车场路面下路径偏离全局路径较大的问题．最后将改进的DWA应用于四轮独立驱动、独立转向的清扫机器人上进行对比实验．实验结果表明,在相同的全局路径、相同的路况下,改进DWA的路径平均误差较传统DWA减小了约60%,轮胎垂直载荷在不同路况下也大大提高,验证了本文方法的有效性和可靠性．     

Configuration in smart service systems: A practice‐based inquiry

In this paper, we develop a new perspective on configuration processes inherent to smart service systems that brings human actors to the theoretical foreground, is informed by practice theory, and is grounded in an intervention study of smart locating systems used in home care of persons with dementia. Maintaining control of the location of persons with dementia is a major source of caregiver burden, and assistive technologies such as smart locating systems hold the promise of enhancing quality of life and reducing caregiver burden. Drawing from research on smart service systems, organizational configuration research, and practice theory, we articulate a conceptual model of configuring in practice to explain how practice elements and the capabilities of smart technologies become mutually configured. Our analysis of study participants' experiences with the locating systems identified three distinctive configurations, characterized as enhanced smartness, degraded smartness, and fragile smartness, which developed through configuring processes. The configuring in practice model we develop here helps explain why unexpected and anticipated configurations develop and thus the conditions that facilitate or inhibit value cocreation in smart service systems.     

Product/process definition,technology adoption and workforce qualification: impact on performance

This paper analyses the impact of manufacturing technologies (MTs) and workers’ qualifications on labour productivity and flexibility, taking into account the product-process (P-P) strategy adopted by the company. This allows for a discussion about the well-known P-P matrix initially proposed by Hayes and Wheelwright (1994) in order to evaluate options of production systems. The empirical analysis is performed by means of a panel of data of 13 years for the Spanish manufacturing industry, which includes a total of 7741 observations. The results indicate a complementary effect between technology and skills to overcome the trade-offs of production systems.