장은화 교수

An accurate nonlinearity compensation technique for voltage source inverter (VSI) inverters is presented in this paper. Because of the nonlinearity introduced by the dead time, turn-on/off delay, snubber circuit and voltage drop across power devices, the output voltage of VSI inverters is distorted seriously in the low output voltage region. This distortion influences the output torque of IM motors for constant V/f drives. The nonlinearity of the inverter also causes 5th and 7th harmonic distort

During the last decade,especially since the First International Chinese Word Segmentation Bakeoff was held in July 2003,the study in automatic Chinese word has been greatly improved.Those improvements could be summarized as following:(1) on the computation sense Chinese words in real text have been well-defined by segmentation guidelines + lexicon + segmented corpus;(2) practical results show that performance of statistic systems outperforms that of handcrafted rule-based systems;(3) the evaluat

This paper describes a novel character tag-ging approach to Chinese word segmenta-tion and named entity recognition (NER) for our participation in Bakeoff-4.1 It integrates unsupervised segmentation and conditional random fields (CRFs) learning successfully, using similar character tags and feature tem-plates for both word segmentation and NER. It ranks at the top in all closed tests of word segmentation and gives promising results for all closed and open NER tasks in the Bake-off. Tag set selec

Chinese word segmentation is an active area in Chinese language processing though it is suffering from the argument about what precisely is a word in Chinese. Based on corpus-based segmentation standard, we launched this study. In detail, we regard Chinese word segmentation as a character-based tagging problem. We show that there has been a potent trend of using a character-based tagging approach in this field. In particular, learning from segmented corpus with or without additional linguistic r

LC protects against the progression of tubulointerstitial fibrosis in an obstructed kidney.

Ideal cardiovascular health (CVH) has been defined by the American Heart Association as the absence of disease and presence of 7 key health factors. Since it is unknown whether cumulative exposure to CVH reduces the risk of developing arterial hypertension, we prospectively examined the potential association between cumulative CVH (cumCVH) score (except for blood pressure metrics) and incident hypertension.Of the 101,510 participants with an age range of 18 to 98 years in this longitudinal commu

Dialogue response generation requires an agent to generate a response according to the current dialogue history, in terms of which two-party dialogues have been well studied, but leaving a great gap for multi-party dialogues at the same time. Different from two-party dialogues where each response is a direct reply to its previous utterance, the addressee of a response utterance should be specified before it is generated in the multi-party scenario. Thanks to the huge amount of two-party conversa

This study introduces the application of deep-learning technologies in automatically generating guidance for independent reading. The study explores and demonstrates how to incorporate the latest advances in deep-learning-based natural language processing technologies in the three reading stages, namely, the pre-reading stage, the while-reading stage, and the post-reading stage. As a result, the novel design and implementation of a prototype system based on deep learning technologies are present

The research of automatic Chinese word segmentation has been advancing rapidly in recent years, espe- cially since the First International Chinese Word Segmentation Bakeoff held in 2003. In particular, character-based tagging has claimed a great success in this field. In this paper, we attempt to generalize this method to subse- quence-based tagging. Our goal is to find longer tagging units through a reliable algorithm. We propose a two-step framework to serve this purpose. In the first step, an

The combination of workflow technologies and software application systems is one of the research directions in computer application area. On the basis of researches of workflow technology, a Web based Workflow System (WebWFS), which is based on script interpreter and is independent of application data, is presented. OOD method is used in workflow engine and a description language based on the script and a IIS Filter are discussed. In order to verify the adaptability of WebWFS, a example which is

This article improves the logistics distribution route and improves the distribution as well as transportation efficiency. The article combines the features of logistics dissemination along with mathematical designing of dissemination automobile routing issue. The mountain climbing procedure with strong local search ability is introduced into the particle swarm optimization (PSO) procedure to improve the offered approach. Two mountain climbing schemes are offered in this article, and two differe

The present study explores the optimal methods for polishing NiTi and Ta stents. Electrochemical polishing was explored and several parameters were investigated including applied voltage, polishing time, and acid pickling prior to the polishing process. As a comparison, chemical polishing was also conducted. Both mechanical and electrochemical polishing of NiTi sheet materials were investigated to study the influence of electrochemical polishing on the surface composition of NiTi stents. Picklin