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1.
基于TM遥感影像的玉米地专题信息自动提取 总被引：1，自引：1，他引：1
TM遥感影像中专题信息的自动提取是目前遥感界的研究热点，也已成为遥感信息生产流程中的瓶颈环节。本文分析了耕地专题信息自动提取的研究现状，选取了吉林中部和辽宁省东北部作为研究区，采用监督分类的方法对研究区TM遥感影像进行分类，提取了玉米地专题信息，玉米地信息的提取精度为85.5%。根据遥感影像目视解译的原理，提出了基于多特征空间的遥感影像专题信息自动提取的研究方法，通过对多特征空间的数学描述和计算机处理实现
遥感专题信息的自动提取。采用多特征空间的方法将玉米地信息分为光谱特征空间、形状特征空间、区域地学特征空间和干扰特征空间，应用ERDAS8.5遥感图像处理软件中的knowledge engineer模块的开发功能，设计了基于多特征空间的玉米地专题信息自动提取的专家库，使用专家库对玉米地信息进行了自动提取，提取精度为92.9%。从基于多特征空间的分类结果与监督分类结果的比较发现，基于多特征空间的自动提取方法可以提高专题信息的提取效率，对未来实现遥感影像的智能解译是一种研究方法的探索。 相似文献
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Effective teamwork, knowledge coordination, and knowledge creation are recognized as essential sources of team effectiveness and creativity in modern organizations. Nowadays, social media is significantly modifying the patterns in the use of technology to support knowledge management practices in teams. At the same time, the literature shows that transactive memory system (TMS), which refers to how team members share their distributed knowledge and expertise, is an important factor affecting team performance. However, minimal effort has been made to elaborate on the precise role of social media in supporting TMS for enhancing absorptive capacity (ACAP) and knowledge creation capability (KCC) of the team, which in turn might influence team creative performance (TCP). Therefore, to address this gap in the literature, a theoretical model is developed and validated. Survey data collected from 334 members of 68 knowledge work teams indicated that social media use at work has a positive relationship with TMS and both social media use at work and TMS are positively related to ACAP and KCC of the team. Results further indicated that ACAP positively influenced KCC, and both have a direct relationship with TCP. This study shows that careful investment in social media by an organization can enhance meta-knowledge of “who knows what” within teams. Finally, exploring external knowledge alone is not enough. Instead, organizations must ensure external knowledge is utilized to create new knowledge to improve TCP. 相似文献
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目的:探讨和实践可视化技术结合医学教学在医学影像本科学生教学中的具体教学模式、教学方法和评价体系。方法:选取2017年5月~2017年12月期间64名我科室实习学生为研究对象,随机分为传统教学组(32名)、可视化教学组两组(32名),第一组采取传统教育方法;第二组在前者基础上,按照可视化技术穿插教学。课程结束后进行理论知识及实践操作考试进行比较。结果:可视化教学组理论分数为(91.02±4.12)分、实操分数为(90.88±4.27)分,均明显高于传统教学组,差异具有统计学意义,P<0.05。结论:在医学影像科学临床技能教学过程中,将可视化教学结合形成新的教学理念和新的教学实施方式,可以增强医学影像本科生的临床思维,提高临床操作技能,夯实理论基础,同时锻造出高素质的教师团队。 相似文献
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Contemporary information technologies such as social media have invigorated the way knowledge is shared within organizations to the extent that we have to rethink and reassess our understanding of the role and influence of technology in organizational processes and knowledge sharing. This paper uses the strategy as practice lens guided by the interpretivist philosophy to understand the influence of informal social media practices on knowledge sharing and work processes within an organization. The paper uses empirical evidence from the case study of a telecom organization in Tanzania to gain theoretical insight into informal social media practices and knowledge sharing. This research contributes to the Information Systems (IS) literature by asserting that organizational processes are achieved by mundane knowledge sharing mediated by informal social media use within the organization. Also, the study contributes to IS literature by highlighting how emerging informal practices are essential to daily processes within organizations. 相似文献
5.
《Research Policy》2019,48(9):103819
Expertise in digital technologies is necessary, but rarely sufficient to generate digital innovation. The purpose of this paper is to explore how specialists rooted in digital and analog knowledge domains engage in cross-domain collaboration to jointly create digital innovation. Our analysis cross-examines the literature on knowledge integration and coordination by examining the role of boundary-spanning tools in fusing divergent types of knowledge. The empirical setting for our study is the development of digital serious games, a novel breed of digital learning products whose creation involves a wide range of gaming/digital and learning/analog expertise. Drawing on an in-depth qualitative study, we find that boundary-spanning tools such as prototypes, mockups, and whiteboards serve as important knowledge bridges buttressing the overall innovation process, enabling diverse experts to increasingly align and integrate their divergent thought worlds and knowledge domains. Furthermore, we find that the alternative interplay among digital and non-digital tools supports the gradual transformation of digital and analog expertise into a novel digital format. Taken together, our results explicate how boundary-spanning tools facilitate collaborative work among specialists rooted in diverse digital and non-digital knowledge domains. Our findings contribute to the literature on knowledge integration and coordination in cross-domain collaboration and digital innovation. 相似文献
6.
As organizations struggle with how to develop and use their inherent expertise, the importance of knowledge management and collaboration has grown in both academic and practitioner communities. This paper outlines a new concept of collaborative knowledge management (CKM), which bridges the two fields. Drawing from literature, we present a conceptual framework for understanding the concepts underlying CKM. Next, this paper explores how a new technology, peer-to-peer (P2P), fits in the CKM paradigm. A discussion on P2P tools and a comparison of these tools with client server tools for enabling the CKM process is presented. P2P has great appeal for CKM because it allows people to work in a more natural fashion. As technology and practitioners needs evolve, it is important to recognize the existence of various CKM levels in the organization. This paper outlines a framework recognizing five different levels. The final section of the paper identifies research themes concerning the use of P2P applications for CKM both within each of the levels and across levels. 相似文献
7.
Little is known about how human resource practices contribute towards the competitiveness of people based-knowledge intensive organisations in developing countries. This paper examines the role of human resource practices in developing knowledge and learning capabilities for innovation in the Indian information technology services sector. The study draws from the experience of a sample of 11 of the largest information technology service providers (ITSPs) in India and is based on in-depth interviews. The main finding suggests that the talent management architecture of ITSPs that comprises human resource practices and the development of knowledge and learning capabilities is the main drivers of innovation. A conceptual framework showing the link between human resource practices, knowledge and learning capabilities and innovation of ITSPs is developed followed by the limitations of the study and avenues for future research. 相似文献
8.
《Information processing & management》2023,60(1):103106
Teaching images, as an important auxiliary tool in teaching and learning, are fundamentally different from the general domain images. Besides visually similar images being more likely to share common labels, teaching images also face the challenge of visual-knowledge inconsistency, including intra-knowledge visual difference and inter-knowledge visual similarity. To address the above challenges, we present KBHN, a knowledge-aware bi-hypergraph network, which not only considers coarse-grained visual features, but also extracts fine-grained knowledge features that reflect knowledge intention hidden in teaching images. In detail, a visual hypergraph is constructed to connect images with visual similarity. It further enriches coarse-grained visual features by modeling the high-order visual relations among teaching images. Moreover, a knowledge hypergraph based on typical images is built to aggregate images with similar knowledge information, which innovatively extracts fine-grained knowledge features by modeling high-order knowledge correlations between local regions. Furthermore, a multi-head attention mechanism is adopted to fuse visual-knowledge features for enriching image representation. A teaching image dataset is constructed to train and validate our model, which contains 20744 real-world images annotated with 24 knowledge points. Experimental results demonstrate that KBHN, incorporating visual-knowledge features, achieves state-of-the-art performance compared to existing methods. 相似文献
9.
知识价值化与网上技术交易是"大众创业、万众创新"的实践形式,本文根据无形资产网络在线交易过程的特点,从网站用户掌握选择权和话语权的现实出发,对众包模式的第三方在线交易平台进行了组织响应过程的系统分析。从体现知识产品生产、过滤、传播和评价等几个方面对知识资源的有效配置和众包平台网站的服务响应机制进行关联分析,并通过多层次比较分析的因素量化方法确定众包服务的指标权重,反映组织响应各种因素对知识价值化的重要程度,为第三方知识服务和平台网站的职能模块设计的权重分配提供参考。 相似文献
10.
Social informatics research offers insights into the relationship between information technologies and social contexts. However, the material roles of information technologies, and their interplay with the agentic work of social actors, have not been addressed. Drawing on a field study of 37 mobile knowledge workers, we examine the dual material roles (enabling and constraining) played by information technologies in their work practices. We also investigate how these workers exert agency by fashioning multiple information technologies into a functioning digital assemblage. Although information technologies provide consequential affordances that enable mobilization of work across spaces and times, they simultaneously present design-driven, local, organizational, and temporal technological constraints that require mobile knowledge workers to engage in “configuration work” to make information technologies function effectively. Building on a sociomaterial perspective, we further discuss the interplay of information technologies and work practices enacted by mobile knowledge workers, in which both human and technological agency are materialized. 相似文献
11.
Information and communication technology is regarded as a critical means of addressing rural problems of information deficiency, ineffective communication and emotional disconnection. Most studies on information and communication technology for development (ICT4D) can be categorized as a top-down development approach and are often theoretical research or case studies conducted using qualitative methods. In this study, we discuss a new phenomenon of citizen-led information practices in rural areas driven by the rural community and its citizens. By employing a mixed-method approach combining case studies and social network analysis (SNA), we explore how ICT4D can be achieved through citizen-led information practices. This study makes theoretical contributions to the study of ICT4D and information practices as well as the mixed-method approach, which deepen our understanding of the citizen-led information practices of ICT4D. This study also provides practical suggestions to the governments, enterprises, social organizations and rural communities in ICT4D practices and ICT function design. 相似文献
12.
As a Web 2.0 technology, blogs are gaining attention as useful knowledge sharing platforms for knowledge management in a collaborative work environment. This study investigates the relationship between trust and bloggers’ knowledge sharing practices. Based on an analysis of results from the 485 survey respondents, the research found that there is the positive relationship between bloggers’ trust and their knowledge sharing practices. This study explores trust in multiple dimensions including economy-based trust, trust in bloggers, and trust in the Internet and trust in blog providers. The detailed research findings are presented. 相似文献
13.
This study investigated whether and how different factors in relation to task, user-perceived knowledge, search process, and system affect users’ search tactic selection. Thirty-one participants, representing the general public with their own tasks, were recruited for this study. Multiple methods were employed to collect data, including pre-questionnaire, verbal protocols, log analysis, diaries, and post-questionnaires. Statistical analysis revealed that seven factors were significantly associated with tactic selection. These factors consist of work task types, search task types, familiarity with topic, search skills, search session length, search phases, and system types. Moreover, the study also discovered, qualitatively, in what ways these factors influence the selection of search tactics. Based on the findings, the authors discuss practical implications for system design to support users’ application of multiple search tactics for each factor. 相似文献
14.
Over the past 20 years, many researchers and theorists have generated a significant body of literature in the interrelated fields of knowledge management (KM), organizational learning (OL), and knowledge creation (KC). A large body of work generated by proponents of technology as a primary facilitator of KM, OL, and KC supports the expenditure of billions of dollars in information technology infrastructure and knowledge management systems. A separate body of work generated by behaviourists illustrates how organizational culture is a major determinate in the effectiveness of the technology. Ultimately, corporate executives measure success in terms recognizable to financial markets. Yet, an empirical link connecting the interrelated dots needed to provide practical guidance to practitioners and executives remains elusive. This paper summarizes historical and current perspectives within the field and identifies the need for continue empirical research to build a practical construct. 相似文献
15.
Knowledge management (KM) has matured to the point that many organisations either believe they have such practices in place or at least understand they are relevant to the knowledge work commonly undertaken in many industries. What is lacking from the literature, however, is a solid foundation for the philosophies underpinning KM and particularly for how tacit knowledge informs the KM space. Research over decades shows tacit knowledge underpins all other forms of knowledge, enabling the interpretation and judicious application of knowledge, leading (at its highest levels) to the concept of wisdom. As an academic discipline, artificial intelligence (AI) was established before KM, has been grounded in the computing discipline for many decades, and is applied broadly in many domains. This paper explores how AI can inform the KM debate. Rather than simply provide examples of AI success stories as applied to KM in practice, it explores the theoretical and practical limitations of AI and KM in unison, providing at the same time a strong epistemological understanding of both disciplines as a means of furthering the knowledge debate, with particular emphasis on the role of tacit knowledge within this jurisdiction. 相似文献
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17.
Oudshoorn N 《Social studies of science》1997,27(1):41-72
Studies of laboratory work have rarely focused on the role of intermediary organizations in developing R&D activities. Most studies focus on a single university-based research laboratory or an industrial R&D unit. Moreover the rejection by social constructivist scholars of universalistic, deterministic explanations of the development of science and technology has led to an overemphasis on the local features of scientific and technological work. Based on a case study of the role of the World Health Organization (WHO) in contraceptive R&D, this paper suggests that an analysis of the role of intermediary organizations enables us to go beyond a too-narrow focus on the micro-sociological dynamics of laboratory work, to include the macro- and meso-sociological dimensions of science and technology. First, a focus on intermediary organizations enables us to learn more about the manner in which locally specific laboratory cultures are transformed into translocal research practices. This paper shows how literary technologies, and to an even greater extent material technologies, are important tools in accomplishing standardization of local laboratory cultures. Second, a focus on intermediary organizations enables us to study how concerns that go beyond the laboratory--in this case, population control policies and the agenda of the WHO--help to shape laboratory practices. 相似文献
18.
Based on an exploratory study of the work and learning processes of highly skilled and experienced knowledge workers, this paper explores an alternative perspective to knowledge management, one that focuses on how individual workers apply knowledge processes to support their day-to-day work activities – broadly characterized as problem solving – and learning practices. Developing the concept of Personal Knowledge Management, the paper presents an emergent model that links distinctive types of problem solving activities with specific cognitive, information, social and learning competencies, supported by an individual, social and organizational enablers. 相似文献
19.
The COVID-19 pandemic has had massive implications for the nature of work and the role technology plays in the workplace. Organisations have been forced into rapid ‘big bang’ introduction of technology and ‘tech-driven’ practices in an unprecedented and time pressured manner. In many cases there has been little training or reflection on how the practices and associated technology should be introduced and integrated or adapted to suit the new workplace context. We argue that there is a need for a more reflective ‘normalisation’ of work practices and the role technology plays. The paper draws on normalisation process theory (NPT) and its underlying components of cohesion, cognitive participation, collective action and reflexive monitoring. As an exemplar, we focus on the changing nature of work and adoption of remote working practices. The paper uses NPT to examine current thinking and approaches and offering some guidelines to inform research and practice. 相似文献
20.
《Research Policy》2023,52(8):104828
With the rise of artificial intelligence (AI), professional services firms (PSFs) need to innovate their services to adapt to AI. However, traditional ad hoc innovations driven by individual professionals have limitations in incorporating new technology outside their expertise. Although service R&D—an organizational function for centralized coordination of service innovations in strategically targeted areas—is potentially effective, studies on service R&D have still been scarce. This case study aims to fill the gap by examining how PSFs can establish and utilize service R&D to innovate services, overcoming the challenges of AI adoption. An in-depth qualitative study was conducted on the process by which the Big Four audit firms incorporated AI into their external audit service in Japan in the 2010s. The analysis shows the detailed process of how newly created service R&D organizations advanced AI adoption in the case firms. This study contributes to the literature on innovations in services and PSFs by (1) demonstrating the neglected but critical role of service R&D as an innovation enabler beyond the existing expertise of service firms, (2) constructing a three-phase model of the evolution of the service R&D function, and (3) suggesting the significance of innovation process design for the legitimation of innovations. This study also expands our knowledge of AI adoption, presenting a process tailored to address the challenges inherent in AI adoption for PSFs. 相似文献