Bo Chen

Bo Chen
Chinese Academy of Sciences | CAS · Research Center for Urban Ecological Health and Environmental Safety

About

33
Publications
2,128
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58
Citations
Introduction

Publications

Publications (33)
Article
The effect of tempering process on the microstructure and properties of low alloyed cast steel was studied. The results show that tempered at (200~400)°C, the M/A island of the granular bainite decomposes and carbide precipitates. When the tempering temperature rises to (500~600)°C, the M/A island is completely decomposed, and the carbide aggregate...
Article
This study presents a technique for designing a multimode configurable weak physically unclonable function (PUF) for security-key generation. The PUF cell is based on the maximum gain point deviations of bias-voltage-controlled inverters. By implementing a preselection strategy, the proposed PUF can simultaneously expose all unstable cells under no...
Article
In this paper, Fe-Cr-C hardfacing alloys with different chromium contents (7.5, 15, 20 and 32wt%, respectively) were deposited by PTA welding. Influence of Cr content on the hardfacing alloys was revealed by analyzing the microstructure, microhardness and wear behavior. The results showed that the primary phase changed from M3C to M7C3, and the eut...
Article
The effects of different zero-holding quenching temperatures on the tempering microstructure, mechanical properties and wear resistance of 40Cr were studied. The results showed that the microstructure of 40Cr was tempered sorbite and a small amount of unmelted ferrite after quenching at 850 °C and tempering at 550 °C for 2 h. Tempered sorbite was o...
Article
Full-text available
GS-18NiMoCr36 steel was used to prepare fixed pin with different hardness. The rotating ring with hardness of 53HRC was prepared by 42CrMo steel. Under the different load conditions, MR-H3B high-speed ring on block wear tester was used to study the influence of different hardness matching friction pair wear performance. The results show that with t...
Article
Full-text available
Dry sliding wear (pin-on-disc) tests were carried out under different loads and sliding speeds at room temperature for 40MnB. The present work attempts to explore wear mechanism of 40MnB. Compared with friction speed, it was found that the effect of load is more obvious. At a certain friction speed, the wear loss increase obviously with the increas...
Article
Full-text available
The microstructure and properties of G18NiMoCr3-6 steel after medium frequency. Quenching hardening with different process parameters and its heat treatment process optimizing were studied. The results show that the best combination is voltage 420V, cooling water flow 300L/h, moving speed 200mm/min. After medium frequency induction hardening proces...
Article
Full-text available
In this paper, the rubber with different carbon black content was designed and its properties were tested to verify its effects on rubber properties. The results showed that with the increase of carbon black content, the hardness of rubber increased gradually, and the tensile strength, elongation and tear strength firstly increased and then decreas...
Article
Full-text available
The effect of tempering process on the microstructure and mechanical properties of G18NiMoCr3-6 cast steel was investigated. The results show that the microstructure of G18NiMoCr3-6 cast steel is granular bainite after normalizing at 900°C, which consists of bainitic ferrite and isolated grain or strips (M/A) islands. (M/A) island decomposes, and c...
Article
Full-text available
BS960 steel plates were welded by Laser-MAG and MAG. The microstructure and properties of the welded joints were investigated by optical microscope, micro-hardness tester, universal tensile testing machine, impact tester, scanning electron microscope (SEM) and fatigue tester. By a series of experiments, the following results were obtained: The grai...
Article
Fe60 alloy surface coating was prepared on Q345 by plasma surfacing. The hardness and wear resistance of surfacing coating were tested by Rockwell Hardness Tester and dynamic load abrasive abrasion Tester. The microstructure of surfacing coating was studied by Optical Microscopy. The Influence of the surfacing current on hardness, microstructure an...
Article
Fe-based alloy coatings were produced by the plasma transferred arc(PTA) at arc current values of 90A,100A,110A and 120A. Scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and optical microscopy (OM) were used to characterize the microstructure of the coatings. The wear resistances of the coatings were tested by impact and we...
Article
Recently, sentiment analysis of text is becoming a hotspot in the study of natural language processing, which has drawn interesting attention due to its research value and extensive applications. This paper introduces a sentiment analysis system, which is to satisfy two aspects of sentiment analysis requirement in sentence and text levels. They are...
Article
Recently, sentiment analysis of text is becoming a hotspot in the study of natural language processing. This paper introduces a smart sentiment analysis system, which is to satisfy three levels of sentiment analysis requirement. They are Chinese sentiment word recognition and analysis, sentiment related element extraction and text orientation analy...
Chapter
In Recent years, the HTML5 Web technologies have become more and more popular. HTML5 provides a variety of new features and APIs that can be used by the applications running in terminals’ browsers, especially on mobile devices. This new kind of application is called HTML5 Mobile Web Applications (Web Apps hereafter). Web Apps are written in simple...
Article
Full-text available
Recently, sentiment analysis of text is becoming a hotspot in the study of natural language processing, which has drawn interesting attention due to its research value and extensive applications. This paper introduces a smart sentiment analysis system, which is to satisfy three aspects of sentiment analysis requirement. These are Chinese sentiment...
Conference Paper
Efficient and intelligent music retrieval has become a very important topic nowadays. Analysis of lyrics must be a complement of acoustic methods for music retrieval. One basic aspect of music retrieval is music emotion recognition by learning from lyrics. This problem is different from traditional text classification in that more linguistic or sem...
Conference Paper
This paper is to introduce a novel semi-supervised learning algorithm named linear neighborhood spread (LNS), which is capable for learning manifold structures. Labeled and unlabeled data are represented as vertices in a weighted graph, and each data point is assumed can be linearly constructed from its neighborhood. Labels are spread through the e...
Conference Paper
In natural languages, compound words play an important role and their automatically extraction is very helpful in information retrieval, information extraction and text classification. We introduce a semi-supervised Chinese compound extraction approach based on HMM using bootstrapping in this paper. First, we define a set of tags BEMI {beginning, e...
Article
Full-text available
Document subjectivity analysis has become an important aspect of web text content mining. This problem is similar to traditional text categorization, thus many related classification techniques can be adapted here. However, there is one significant difference that more language or semantic information is required for better estimating the subjectiv...
Conference Paper
Full-text available
This paper describes BUPT (pris) participation in baseline adhoc retrieval task and the opinion retrieval task at Blog Track 2008. The system adopts a two-stage strategy in the opinion retrieval task. In the first stage, the system carries out a basic topic relevance retrieval to get the top 1,000 documents for each query. In the second stage, our...
Conference Paper
In recent years, document sentiment analysis has attracted a great deal of research interest. One important aspect of this filed is the subjectivity analysis. This problem is different from traditional text categorization on that more linguistic or semantic information are required for better estimating the subjectivity of a document. Therefore, in...
Conference Paper
In recent years, document sentiment analysis has attracted a great deal of research interest. One important aspect of this filed is the subjectivity analysis. This problem is different from traditional text categorization on that more linguistic or semantic information are required for better estimating the subjectivity of a document. Therefore, in...
Conference Paper
This paper is to introduce an algorithm to cluster Chinese short texts for mining web topics based on Chinese chunks. Aiming at the characteristics of Chinese short texts, the algorithm employs N-gram feature extraction to capture Chinese chunks from texts, which reflect the text semantic structure and character dependency. Then RPCL algorithm is a...
Conference Paper
In Chinese word segmentation, disambiguation and unknown words identification are becoming the two key issues. In this paper, a two-stage strategy based system is constructed to deal with these problems. First, an n-gram based model is applied to do the basic segmentation as well as disambiguation in some extent. Then, in the second stage, a langua...
Article
In Chinese word segmentation, disambiguation and unknown words identification are the two key issues still remaining. In order to deal with these problems in a uniform way, a language tagging template, named POC-NLW, is presented in this paper to explore the word creation mechanisms of Chinese language on character-level. Based on this template, a...

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