我国天南星科植物     

李恒  肖溶  曾孝濂 《中国科学院研究生院学报》1977,15(2):87-109

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Text mining techniques for patent analysis   总被引：1，自引：0，他引：1  

Yuen-Hsien Tseng  Chi-Jen Lin  Yu-I Lin 《Information processing & management》2007

Patent documents contain important research results. However, they are lengthy and rich in technical terminology such that it takes a lot of human efforts for analyses. Automatic tools for assisting patent engineers or decision makers in patent analysis are in great demand. This paper describes a series of text mining techniques that conforms to the analytical process used by patent analysts. These techniques include text segmentation, summary extraction, feature selection, term association, cluster generation, topic identification, and information mapping. The issues of efficiency and effectiveness are considered in the design of these techniques. Some important features of the proposed methodology include a rigorous approach to verify the usefulness of segment extracts as the document surrogates, a corpus- and dictionary-free algorithm for keyphrase extraction, an efficient co-word analysis method that can be applied to large volume of patents, and an automatic procedure to create generic cluster titles for ease of result interpretation. Evaluation of these techniques was conducted. The results confirm that the machine-generated summaries do preserve more important content words than some other sections for classification. To demonstrate the feasibility, the proposed methodology was applied to a real-world patent set for domain analysis and mapping, which shows that our approach is more effective than existing classification systems. The attempt in this paper to automate the whole process not only helps create final patent maps for topic analyses, but also facilitates or improves other patent analysis tasks such as patent classification, organization, knowledge sharing, and prior art searches.  相似文献   

Development of a ubiquitous learning platform based on a real‐time help‐seeking mechanism     

Gwo‐Jen Hwang  Chih‐Hsiang Wu  Judy C. R. Tseng  Iwen Huang 《British journal of educational technology : journal of the Council for Educational Technology》2011,42(6):992-1002

The popularity of mobile devices has encouraged the advance of ubiquitous learning, in which students are situated in a real‐world learning environment with support from the digital world via the use of mobile, wireless communications, or even sensing technologies. Most of the ubiquitous learning systems are implemented with high‐cost sensing devices for detecting the locations or behaviours of learners; moreover, these systems mainly focus on providing learning guidance or learning materials, while facilities for supporting mutual help among students are usually ignored. In this study, we propose a context‐aware ubiquitous learning platform (CULP) which uses low‐cost cell phones with embedded cameras and Internet service to support ubiquitous learning. CULP is able to provide instant support for learners in the ubiquitous learning activity; that is, learners can receive help from the right people via the hints given by the learning system when they encounter problems during their learning activities. The experimental results of a Personal Computer‐Assembling course show that, with the assistance of the new learning platform, both the learning efficiency and the learning achievement of the students were significantly improved.  相似文献   

Agency as a fourth aspect of students’ engagement during learning activities     

Johnmarshall Reeve  Ching-Mei Tseng 《Contemporary educational psychology》2011,36(4):257-267

While a consensus has emerged to characterize student engagement during learning activities as a three-component construct featuring behavioral, emotional, and cognitive aspects, we propose adding agentic engagement as an important new aspect, which we define as students’ constructive contribution into the flow of the instruction they receive. High school students (237 females, 128 males) from Taiwan completed surveys of their classroom motivation and the four hypothesized aspects of engagement while grades were obtained at the end of the semester. Structural equation modeling analyses showed that agentic engagement was both a distinct and an important construct, one that was associated with students’ constructive motivation, related to each of the other three aspects of engagement, and predicted independent variance in achievement. The discussion highlights the important, though currently neglected, ways that students contribute constructively into the flow of the instruction they receive, as by personalizing it and by enhancing both the lesson and the conditions under which they learn.  相似文献   

Effects of compression garments on surface EMG and physiological responses during and after distance running     

Wei-Chun Hsu  Li-Wen Tseng  Fu-Chun Chen  Li-Chu Wang  Wen-Wen Yang  Yi-Jia Lin  Chiang Liu 《运动与健康科学(英文)》2020,9(6):685-691

BackgroundThe few previous studies that focused on the effects of compression garments (CG) on distance running performance have simultaneously measured electromyogram, physiological, and perceptual parameters. Therefore, this study investigated the effects of CG on muscle activation and median frequency during and after distance running, as well as blood-lactate concentration and rating of perceived exertion (RPE) during distance running.MethodsEight healthy male recreational runners were recruited to randomly perform two 40 min treadmill running trials, one with CG, and the other with control garment made of normal cloth. The RPE and the surface electromyography (EMG) of 5 lower extremity muscles including gluteus maximus (GM), rectus femoris (RF), semitendinosus (ST), tibialis anterior (TA), and gastrocnemius (GAS) were measured during the running trial. The blood-lactate levels before and after the running trial were measured.ResultsWearing CG led to significant lower muscle activation (p < 0.05) in the GM (decreased 7.40%–14.31%), RF (decreased 4.39%–4.76%), and ST (decreased 3.42%–7.20%) muscles; moreover, significant higher median frequency (p < 0.05) in the GM (increased 5.57%) and ST (increased 10.58%) muscles. Wearing CG did not alter the RPE values or the blood-lactate levels (p > 0.05).ConclusionWearing CG was associated with significantly lower muscle activation and higher median frequency in the running-related key muscles during distance running. This finding suggested that wearing CG may improve muscle function, which might enhance running performance and prevent muscle fatigue.  相似文献   

Increased density and coverage uniformity of viruses on a sensor surface by using U-type, T-type, and W-type microfluidic devices     

Wu CC  Tseng PK  Tsai CH  Liu YL 《Biomicrofluidics》2012,6(2):24124-2412418

Microorganisms, molecules, or viruses in the fluidic environment are usually at considerably low Reynolds numbers because of small diameters. The viscous forces of molecules and viruses dominate at considerably low Reynolds numbers. This study developed three microfluidic devices, that is, T type, U type, and W type devices, to control the flow movement, which can increase the adhesion density of viruses on the surface of the sensor. The linker 11-mercaptoundecanoic acid (11-MUA) and Turnip yellow mosaic virus (TYMV) were used in this study and measured by a confocal microscope. Fluorescent intensity and coverage of 11-MUA and TYMV were used to identify the adhesion density quantitatively. Results indicate that 11-MUA layers and TYMV disperse randomly by the dipping method. Attachment tests for T-, U-, and W-type devices demonstrated average fluorescence intensities of 1.56, 2.18, and 2.67, respectively, and average fluorescence coverage of 1.31, 1.87, and 2.55 times those of dipping techniques, respectively. The T-type device produced the lowest fluorescence coverage uniformity (10%-80%), whereas the W-type device produced the highest fluorescence coverage uniformity (80%-90%). Fluorescence intensity correlates positively with flow within a specified flow range; however, the exact relationship between fluorescence intensity and flow requires further study. Attachment tests for TYMV virus samples indicated that the W-type device produced an average fluorescence intensity of 3.59 and average fluorescence coverage of 19.13 times greater than those achieved through dipping techniques. Traditional immersion methods achieved fluorescence coverage of 0%-10%, whereas that of the W-type device reached 70%-90%.  相似文献   

Use and performances of Web-based portfolio assessment     

Chi-Cheng Chang  Kuo-Hung Tseng 《British journal of educational technology : journal of the Council for Educational Technology》2009,40(2):358-370

This research explored the influence of a Web-based portfolio assessment system on students' performances. The methodological procedure adopted was to have the experimental group use the system, with the control group using conventional assessment. The study subjects were junior high school students of two computer classes. The experimental results revealed that the use of the system has significant positive influence on students' performances. According to estimated effect size, the most significant indicators were reflection, self-assessment, continuous improvement, goal setting, problem solving, data gathering, work and peer interaction. However, peer-assessment performance was not enhanced significantly. Therefore, one recommendation was to reduce peer-assessment and instead offer specific illustrations to the students as well as the opportunity to drill.  相似文献   

中国菊科植物杂记     

林镕  程用谦 《中国科学院研究生院学报》1978,16(3):82-86

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口述历史在台湾社区营造的应用:以村史运动为主的探讨     

曾冠杰 《高校图书馆工作》2017,(3)

在台湾,狭义的村史运动系指1998年至1999年间的“大家来写村史”计划,在当时有其进步性与实验性,而广义的村史运动延续至今.村史运动不只是一种地方文史工作,更有浓厚的社区营造意义.本文首先考察地方文史工作与社区营造的关系,再说明村史运动的社区营造意义,以及村史运动应用口述历史的方法,并进一步探讨其中不同于学院派历史学者的作法,为口述历史带来新的活力与启发.  相似文献   

Relating skill acquisition to science classroom teaching behavior     

D. R. Cotten  J. J. Evans  M. S. Tseng 《科学教学研究杂志》1978,15(3):187-195

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