26 results on '"Yan Chun Zhu"'
Search Results
2. Calcimycin Inhibits
- Author
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Anil Mathew, Tharappel, Zhong, Li, Yan Chun, Zhu, Xiangmeng, Wu, Sudha, Chaturvedi, Qing-Yu, Zhang, and Hongmin, Li
- Subjects
Fungal Proteins ,Mice ,Antifungal Agents ,Cryptococcus neoformans ,Animals ,Humans ,Cryptococcosis ,Sequence Alignment ,Calcimycin ,Inteins - Abstract
Drug resistance is a significant concern in the treatment of diseases, including cryptococcosis caused by
- Published
- 2023
3. Calcimycin Inhibits Cryptococcus neoformans In Vitro and In Vivo by Targeting the Prp8 Intein Splicing
- Author
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Anil Mathew Tharappel, Zhong Li, Yan Chun Zhu, Xiangmeng Wu, Sudha Chaturvedi, Qing-Yu Zhang, and Hongmin Li
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Infectious Diseases - Published
- 2022
4. Impacts of Analyst Reports’ Descriptions of Corporate Innovative Behavior on Stock Price Synchronicity
- Author
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Wei Zhang, Yu-xia Zhao, Chen-guang Li, Yan-chun Zhu, and Xue-feng Li
- Published
- 2023
5. Modeling and Prediction of Stock Price with Convolutional Neural Network Based on Blockchain Interactive Information
- Author
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Yan-chun Zhu, Wei Zhang, Jun-feng Li, Jing Li, and Ke-xin Tao
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Technology ,Blockchain ,Article Subject ,Computer Networks and Communications ,Computer science ,business.industry ,TK5101-6720 ,02 engineering and technology ,Machine learning ,computer.software_genre ,Convolutional neural network ,Stock price ,020204 information systems ,Telecommunication ,0202 electrical engineering, electronic engineering, information engineering ,020201 artificial intelligence & image processing ,Artificial intelligence ,Electrical and Electronic Engineering ,business ,computer ,Stock (geology) ,Information Systems - Abstract
The interactive information in blockchain architecture establishes an effective communication channel between users and enterprises, enabling them to communicate in a comprehensive and effective manner. Therefore, taking blockchain interactive information as the research object, this paper explores how the intervention of official information on investors affects the stock price movement and then makes predictions on stock prices according to the emotional tendency of interactive information. With the contextual information fusion, a sentiment computing model based on a convolutional neural network is established to extract and quantify the emotional features of blockchain interactive information. Combined with investors’ emotional features, the stock price prediction model based on long short-term memory is proposed. The experiment results show that the accuracy of the model has been improved by incorporating the intervened emotional features, thereby proving that information clarification can have a positive effect on the stock price.
- Published
- 2020
6. Does government information release really matter in regulating contagion-evolution of negative emotion during public emergencies? From the perspective of cognitive big data analytics
- Author
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Wei Zhang, Yan-chun Zhu, and Meng Wang
- Subjects
Computer Networks and Communications ,business.industry ,Computer science ,Deep learning ,05 social sciences ,Big data ,Cognition ,02 engineering and technology ,Library and Information Sciences ,Public opinion ,Lexicon ,Disgust ,Framing (social sciences) ,020204 information systems ,0502 economics and business ,0202 electrical engineering, electronic engineering, information engineering ,050211 marketing ,Word2vec ,Artificial intelligence ,business ,Information Systems ,Cognitive psychology - Abstract
The breeding and spreading of negative emotion in public emergencies posed severe challenges to social governance. The traditional government information release strategies ignored the negative emotion evolution mechanism. Focusing on the information release policies from the perspectives of the government during public emergency events, by using cognitive big data analytics, our research applies deep learning method into news framing framework construction process, and tries to explore the influencing mechanism of government information release strategy on contagion-evolution of negative emotion. In particular, this paper first uses Word2Vec, cosine word vector similarity calculation and SO-PMI algorithms to build a public emergencies-oriented emotional lexicon; then, it proposes a emotion computing method based on dependency parsing, designs an emotion binary tree and dependency-based emotion calculation rules; and at last, through an experiment, it shows that the emotional lexicon proposed in this paper has a wider coverage and higher accuracy than the existing ones, and it also performs a emotion evolution analysis on an actual public event based on the emotional lexicon, using the emotion computing method proposed. And the empirical results show that the algorithm is feasible and effective. The experimental results showed that this model could effectively conduct fine-grained emotion computing, improve the accuracy and computational efficiency of sentiment classification. The final empirical analysis found that due to such defects as slow speed, non transparent content, poor penitence and weak department coordination, the existing government information release strategies had a significant negative impact on the contagion-evolution of anxiety and disgust emotion, could not regulate negative emotions effectively. These research results will provide theoretical implications and technical supports for the social governance. And it could also help to establish negative emotion management mode, and construct a new pattern of the public opinion guidance.
- Published
- 2020
7. Candida aurisIsolates Resistant to Three Classes of Antifungal Medications — New York, 2019
- Author
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Belinda, Ostrowsky, Jane, Greenko, Eleanor, Adams, Monica, Quinn, Brittany, O'Brien, Vishnu, Chaturvedi, Elizabeth, Berkow, Snigdha, Vallabhaneni, Kaitlin, Forsberg, Sudha, Chaturvedi, Emily, Lutterloh, Debra, Blog, and Yan Chun, Zhu
- Subjects
medicine.medical_specialty ,Antifungal Agents ,Health (social science) ,Echinocandin ,Epidemiology ,Health, Toxicology and Mutagenesis ,New York ,Drug resistance ,01 natural sciences ,Asymptomatic ,03 medical and health sciences ,0302 clinical medicine ,Health Information Management ,Drug Resistance, Fungal ,Internal medicine ,Health care ,Humans ,Medicine ,Full Report ,030212 general & internal medicine ,0101 mathematics ,Aged ,Candida ,Transmission (medicine) ,business.industry ,Public health ,010102 general mathematics ,Outbreak ,General Medicine ,Middle Aged ,Candida auris ,medicine.symptom ,business ,medicine.drug - Abstract
Candida auris is a globally emerging yeast that causes outbreaks in health care settings and is often resistant to one or more classes of antifungal medications (1). Cases of C. auris with resistance to all three classes of commonly prescribed antifungal drugs (pan-resistance) have been reported in multiple countries (1). C. auris has been identified in the United States since 2016; the largest number (427 of 911 [47%]) of confirmed clinical cases reported as of October 31, 2019, have been reported in New York, where C. auris was first detected in July 2016 (1,2). As of June 28, 2019, a total of 801 patients with C. auris were identified in New York, based on clinical cultures or swabs of skin or nares obtained to detect asymptomatic colonization (3). Among these patients, three were found to have pan-resistant C. auris that developed after receipt of antifungal medications, including echinocandins, a class of drugs that targets the fungal cell wall. All three patients had multiple comorbidities and no known recent domestic or foreign travel. Although extensive investigations failed to document transmission of pan-resistant isolates from the three patients to other patients or the environment, the emergence of pan-resistance is concerning. The occurrence of these cases underscores the public health importance of surveillance for C. auris, the need for prudent antifungal prescribing, and the importance of conducting susceptibility testing on all clinical isolates, including serial isolates from individual patients, especially those treated with echinocandin medications. This report summarizes investigations related to the three New York patients with pan-resistant infections and the subsequent actions conducted by the New York State Department of Health and hospital and long-term care facility partners.
- Published
- 2020
8. A hybrid neural network approach for fine-grained emotion classification and computing
- Author
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Nasor Ghei, Meng Wang, Wei Zhang, Yan-chun Zhu, and Jian Wang
- Subjects
Statistics and Probability ,Hybrid neural network ,Artificial Intelligence ,business.industry ,Computer science ,Emotion classification ,General Engineering ,Artificial intelligence ,business - Published
- 2019
9. An intelligent textual corpus big data computing approach for lexicons construction and sentiment classification of public emergency events
- Author
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Yan-chun Zhu, Jia-peng Wang, and Wei Zhang
- Subjects
Computer Networks and Communications ,business.industry ,Computer science ,Event (computing) ,Big data ,020207 software engineering ,02 engineering and technology ,Lexicon ,computer.software_genre ,Hardware and Architecture ,Dependency grammar ,0202 electrical engineering, electronic engineering, information engineering ,Media Technology ,Word2vec ,Artificial intelligence ,business ,Affective computing ,computer ,Software ,Natural language processing - Abstract
Considering the deficiencies in the existing emotional lexicons like too many manual interventions, lack of scalability and ignorance of dependency parsing in emotional computing, this paper first uses Word2Vec, cosine word vector similarity calculation and SO-PMI algorithms to build a public event-oriented Weibo emotional lexicon; then, it proposes a Weibo emotion computing method based on dependency parsing and designs an emotion binary tree based on dependency parsing, and dependency-based emotion calculation rules; and at last, through an experiment, it shows that this emotional lexicon has a wider coverage and higher accuracy than the existing ones, and it also performs a public opinion evolution analysis on an actual public event and the empirical results show that the algorithm is feasible and effective.
- Published
- 2018
10. Sentiment classification and computing for online reviews by a hybrid SVM and LSA based approach
- Author
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Xiao-le Wang, Yan-chun Zhu, Sui-xi Kong, and Wei Zhang
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Cognitive evaluation theory ,Computer Networks and Communications ,Latent semantic analysis ,business.industry ,Computer science ,media_common.quotation_subject ,Sentiment analysis ,020206 networking & telecommunications ,02 engineering and technology ,computer.software_genre ,Disgust ,Support vector machine ,Helpfulness ,0202 electrical engineering, electronic engineering, information engineering ,Happiness ,020201 artificial intelligence & image processing ,Artificial intelligence ,business ,computer ,Software ,Natural language processing ,media_common - Abstract
For the current online reviews sentiment classification method, there are some problems such as serious text sparseness and coarse granularity of sentiment calculation. In this paper, the emotion in online reviews is divided into four categories: happiness, hope, disgust, and anxiety. Based on the combination of cognitive evaluation theory and sentiment analysis, a novel approach that combines a well-known techniques to sentiment classification, ie, support vector machine and the latent semantic analysis, was proposed. Based on the approach, this paper explored the influence of these four kinds of emotions on the helpfulness of online reviews, examined the moderating effects of emotion on the helpfulness of online reviews under the two types of products. The experimental results showed that this model could effectively conduct multi-emotion fine-grained computing for online reviews, improve the accuracy and computational efficiency of sentiment classification. The final empirical analysis found that happiness and disgust emotion had significant positive impact on the helpfulness of online reviews, while on the other hand anxiety emotion had significant negative influence. The algorithm and its empirical conclusions provide useful theoretical basis and reference for the company to optimize marketing strategy and improve customer relationship under web 2.0.
- Published
- 2018
11. Microstructure evolution and mechanical properties of near-α Ti-8Al-1Mo-1V alloy at different solution temperatures and cooling rates
- Author
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Yu Long, Weidong Zeng, Yan-chun Zhu, and Xiaohui Shi
- Subjects
010302 applied physics ,Equiaxed crystals ,Quenching ,Materials science ,Mechanical Engineering ,Metallurgy ,Alloy ,Metals and Alloys ,02 engineering and technology ,engineering.material ,021001 nanoscience & nanotechnology ,Microstructure ,01 natural sciences ,Mechanics of Materials ,0103 physical sciences ,Volume fraction ,Materials Chemistry ,engineering ,Grain boundary ,Lamellar structure ,Composite material ,0210 nano-technology ,Cooling down - Abstract
Nine solution-ageing treatments with different solution temperatures (915 °C, 960 °C, 1010 °C) and cooling media (water quenching, oil cooling, air cooling) were firstly conducted on the rolled near-α Ti-8Al-1Mo-1V alloy. The microstructure evolution behavior and various mechanical properties of this alloy were studied. The results show that solution temperature can greatly influence microstructure features. By increasing solution temperature, the volume fraction of primary α phase continuously decreased, the original shapeless primary α phase was sectioned and gradually showed equiaxed shape, and the β grain kept growing until its grain boundary reached the biggest sectional area of primary α particles (pinning effect). Due to the proper mixture of primary α and lamellar α phase, Ti-8Al-1Mo-1V alloy can achieve the best combination of tensile properties, thermal exposure properties and creep properties after being solution-treated at 1010 °C followed by oil cooling. Based on above results, high solution temperature is necessary to the application of Ti-8Al-1Mo-1V alloy. Thus a comprehensive study on the microstructure evolution behavior of Ti-8Al-1Mo-1V alloy at various precisely controlled cooling rates on cooling down from 1010 °C is of great significance. The results show that: with decreasing cooling rate on cooling down from 1010 °C, the volume fraction and the diameter of equiaxed α as well as the thicknesses of the grain boundary α and the lamellar α continuously increased. Equiaxed α shows an evolution process of precipitation, growth, mergence of adjacent equiaxed α and mergence between equiaxed α and lamellar α. Obvious changes of equiaxed α only happened at the cooling rates below 15 °C/s. However, for grain boundary α and lamellar α, the mutant range is “below 40 °C/s”. The exponential decay formula perform well in quantitatively characterizing the microstructure features-cooling rate relations.
- Published
- 2017
12. Research on Correlation and Network Topologies in Asia-pacific Food-Price Stock Markets Network
- Author
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Wei Zhang, Yan Chun Zhu, and Li Hua Wu
- Subjects
General Chemistry ,Industrial and Manufacturing Engineering ,Food Science - Published
- 2016
13. Empirical Analysis on Price Level changes and Price Adjustment Policy Selection: Evidence from B2C E-commerce Market
- Author
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Yan Chun Zhu, Li Hua Wu, and Wei Zhang
- Subjects
Computer Networks and Communications ,business.industry ,05 social sciences ,02 engineering and technology ,E-commerce ,Microeconomics ,020204 information systems ,0502 economics and business ,0202 electrical engineering, electronic engineering, information engineering ,Economics ,050211 marketing ,Price level ,business ,Software ,Selection (genetic algorithm) - Published
- 2016
14. Exploring Price Level and Pricing Adjustment Mode in China's Online Retail Market: the Cases of JD Mall, Amazon and DangDang
- Author
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Yan-Chun Zhu, Wei Zhang, and Li-Hua Wu
- Subjects
TheoryofComputation_MISCELLANEOUS ,Producer price index ,General Computer Science ,Financial economics ,Computer science ,05 social sciences ,Mid price ,TheoryofComputation_GENERAL ,Reservation price ,Law of one price ,0502 economics and business ,Market price ,ComputingMilieux_COMPUTERSANDSOCIETY ,050211 marketing ,Price level ,Price war ,050203 business & management ,Limit price - Abstract
Price wars are a major form of competition for Chinese online retailers. Based on empirical data from online retailers, JD Mall, Amazon(Z.cn) and Dangdang, this study explored the price competition in China's B2C e-commerce market. The average price level, the minimum price level, the price differential level and price variation were considered. The results showed that the average price levels between the three ecommerce websites had statistically significant differences. However, the minimum price level and the price differential level were similar. In terms of the price variation, the three websites adopted different price adjustments and did their best to avoid a direct price war. This suggests that the e-commerce market competition in China is becoming rational.
- Published
- 2016
15. Pan-resistant Candida auris isolates from the outbreak in New York are susceptible to ibrexafungerp (a glucan synthase inhibitor)
- Author
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David Angulo, Vishnu Chaturvedi, Yan Chun Zhu, Sudha Chaturvedi, Katyna Borroto-Esoda, and Stephen Barat
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Microbiology (medical) ,Cross Infection ,Antifungal Agents ,business.industry ,Candidiasis ,New York ,Outbreak ,Microbial Sensitivity Tests ,General Medicine ,Triterpenes ,Disease Outbreaks ,Microbiology ,Infectious Diseases ,Candida auris ,Glucosyltransferases ,Drug Resistance, Multiple, Fungal ,Humans ,Medicine ,Pharmacology (medical) ,Glucan synthase ,Glycosides ,business ,Candida - Published
- 2020
16. A Bibliometric Analysis of Crowdfunding Related Research
- Author
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Yan-Chun Zhu, Wei Zhang, and Xiao-Lin Wu
- Subjects
Government ,Bibliometric analysis ,business.industry ,Ecology (disciplines) ,Related research ,Venture capital ,Public relations ,China ,business ,Field (computer science) ,Meaning (linguistics) - Abstract
Crowd Funding is a behavior that raises funds for projects or venture capital by generating a small amount of money from a large number of people. It started late in China, but has rapidly been developeing. At present, the research on crowdfunding in China is still at an early stage and lacks deep-level exploration Those researches mostly focus on the meaning, characteristics, and operating methods of crowd Funding. Therefore, this paper takes crowd Funding literature as the research object, using CiteSpace to map, describe and counts the related keywords and cited references in the target domain. Starting with the cited relations among the existing studies of core database, focusing on weighted documents, this papaer analyzes the relationship of cooccurrence in crowd funding papers, and conductes research hotspots, trends and knowledge structures in the "Crowd Funding" field. The results show that the business economy is the largest research category in crowdfunding, followed by computer science and government laws and regulations, and there are also studies about crowdfunding from the perspective of the environmental ecology science, public management and social science.
- Published
- 2018
17. Development and Validation of a Real-Time PCR Assay for Rapid Detection of Candida auris from Surveillance Samples
- Author
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Yan Chun Zhu, Lynn Leach, and Sudha Chaturvedi
- Subjects
0301 basic medicine ,Microbiology (medical) ,Time Factors ,030106 microbiology ,Sample processing ,Mycology ,Biology ,Real-Time Polymerase Chain Reaction ,Sensitivity and Specificity ,Rapid detection ,Microbiology ,surveillance samples ,03 medical and health sciences ,0302 clinical medicine ,Limit of Detection ,DNA, Ribosomal Spacer ,TaqMan ,Humans ,030212 general & internal medicine ,DNA, Fungal ,Candida ,High mortality ,Candidiasis ,Fungal pathogen ,Candida auris ,Ribosomal RNA ,real-time PCR assay ,assay validation ,TaqMan chemistry ,3. Good health ,Real-time polymerase chain reaction ,Molecular Diagnostic Techniques ,Epidemiological Monitoring ,Female - Abstract
Candida auris is an emerging multidrug-resistant yeast causing invasive health care-associated infection with high mortality worldwide. Rapid identification of C. auris is of primary importance for the implementation of public health measures to control the spread of infection. To achieve these goals, we developed and validated a TaqMan-based real-time PCR assay targeting the internal transcribed spacer 2 ( ITS 2) region of the ribosomal gene. The assay was highly specific, reproducible, and sensitive, with the detection limit of 1 C. auris CFU/PCR. The performance of the C. auris real-time PCR assay was evaluated by using 623 surveillance samples, including 365 patient swabs and 258 environmental sponges. Real-time PCR yielded positive results from 49 swab and 58 sponge samples, with 89% and 100% clinical sensitivity with regard to their respective culture-positive results. The real-time PCR also detected C. auris DNA from 1% and 12% of swab and sponge samples with culture-negative results, indicating the presence of dead or culture-impaired C. auris . The real-time PCR yielded results within 4 h of sample processing, compared to 4 to 14 days for culture, reducing turnaround time significantly. The new real-time PCR assay allows for accurate and rapid screening of C. auris and can increase effective control and prevention of this emerging multidrug-resistant fungal pathogen in health care facilities.
- Published
- 2018
18. A Novel Approach for Determining Critical Fracture Strain of a near Alpha Titanium Alloy during Hot Compression Deformation
- Author
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Yan Chun Zhu, Qingjiang Wang, Wen Wen Peng, and Wei Dong Zeng
- Subjects
Materials science ,General Engineering ,Nucleation ,chemistry.chemical_element ,Titanium alloy ,Compression (physics) ,Cracking ,Fracture toughness ,chemistry ,Forensic engineering ,Fracture (geology) ,Composite material ,Deformation (engineering) ,Titanium - Abstract
A novel high-speed photography is introduced to determine the critical fracture strain of a near alpha titanium ally during hot compression deformation. This method precisely captures the nucleation site and propagation process of cracking, and thus is an excellent method to represent dynamically the hot-deformation fracture. Compared with the traditional way, it can significantly decrease the number of trials and improve the accuracy. Based on this method, the critical fracture strain is measured, and a critical fracture model is developed.
- Published
- 2014
19. Respiratory Care for Spinal Cord Injury
- Author
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Jun Chang, Yan Chun Zhu, and Zhi Gang Sheng
- Subjects
Respiratory complications ,medicine.medical_specialty ,business.industry ,General Engineering ,Psychological intervention ,Chest physiotherapy ,medicine.disease ,Acute spinal cord injury ,Medicine ,Respiratory system ,business ,Intensive care medicine ,Spinal cord injury ,Respiratory care - Abstract
In this paper the issue of respiratory complications following acute spinal cord injury with reference to the area of high dependency care is considered. It will deal with the pathophysiology behind acute spinal cord injury and its effect on the respiratory system, while discussing the interventions used to prevent these complications. A multitude of therapeutic interventions in the care of respiratory complications has been identified. And positioning, chest physiotherapy and assisted coughing techniques will be considered in this paper.
- Published
- 2013
20. Damage and Fracture Mechanism of As-Cast Ti40 Titanium Alloy during Hot Compression
- Author
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Wei Dong Zeng, Yan Chun Zhu, Wen Wen Peng, and Yong Qing Zhao
- Subjects
Materials science ,Metallurgy ,General Engineering ,Oxide ,Titanium alloy ,Intergranular corrosion ,Adiabatic shear band ,Cracking ,chemistry.chemical_compound ,Shear (geology) ,chemistry ,Shear stress ,Composite material ,Environmental stress fracture - Abstract
The damage and fracture behavior was researched in hot compression of as-cast Ti40 titanium alloy with single β phase. The main fracture modes consist of 45° shear fracture, inner cracking and longitudinal fracture on free-surface, which occur at 850°C/10s-1, 900~950°C/10s-1 and other deformation conditions respectively. Moreover, 45° transgranular cracking is the combination result of adiabatic shear bands due to local temperature rise and shear stress, the inner intergranular cracking is induced by the microvoids near the adiabatic shear bands propagted along grain boundry under shear stress, the surface longitudinal intergranular cracking is caused by the vaporization of oxide and function of hoop tensile stress. In addition, the material undergoes the complex fracture which has to be avoided or decreased in hot processing for obtaining satisfactory properties.
- Published
- 2013
21. The Study on Fracture Behavior in Hot Compression of As-Cast Ti60 Titanium Alloy
- Author
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Wei Dong Zeng, Qingjiang Wang, Wen Wen Peng, and Yan Chun Zhu
- Subjects
Brittleness ,Fracture toughness ,Materials science ,Alloy ,Metallurgy ,General Engineering ,engineering ,Fracture (geology) ,Titanium alloy ,Transgranular fracture ,engineering.material ,Ductility ,Intergranular fracture - Abstract
Hot compression testing of as-cast Ti60 alloy was carried out 970-1120 °C, 0.01-10 s1 and 30-75%. The fracture behavior of the alloy was investigated by light optical microscope, scanning electron microscope. The result shows that, at high strain rate and large height reduction, 45° transgranular fracture and longitudinal intergranular fracture are observed, which are confirmed to be transgranular cleavage brittle fracture and ductile fracture respectively. Moreover, the cracking degree increases with the increasing height reduction. Besides, the alloy deformed at high temperature exhibits a good ductility, whereas lots of longitudinal cracks occurs on its surface due to the brittle alpha-case formation. Consequently, the systematic analysis on the fracture mechanism for as-cast Ti60 alloy is vitally necessary for the optimization of processing parameters in its cogging process.
- Published
- 2013
22. Finite Element Simulation of the Hot-Rolling Process of Titanium Alloy Bar
- Author
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Mwi Rong Shuai, Yan Chun Zhu, and Qing Xue Huang
- Subjects
Stress (mechanics) ,Condensed Matter::Materials Science ,Materials science ,Residual stress ,Bar (music) ,Metallurgy ,General Engineering ,Process (computing) ,Titanium alloy ,Torque ,Deformation (meteorology) ,Composite material ,Finite element simulation - Abstract
In order to overcome the drawbacks in the process of the titanium alloy, the authors propose to produce this kind of bar by Y-type rolling mill. The deforming process of titanium alloy has been simulated dynamically using MSC.Marc finite element software. The stress, strain, temperature and residual stress distributions of deformation area have been analyzed. The rolling force and torque have been obtained. The model could provide the foundation for further theoretical research and engineering application of titanium alloy bar rolling process.
- Published
- 2010
23. Rapid prediction of inducible clarithromycin resistance in Mycobacterium abscessus
- Author
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Vincent E. Escuyer, Yan Chun Zhu, Kara Mitchell, Elizabeth Nazarian, and Kimberlee A. Musser
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biology ,Mycobacterium Infections, Nontuberculous ,Nontuberculous Mycobacteria ,Cell Biology ,Drug susceptibility ,Drug resistance ,biochemical phenomena, metabolism, and nutrition ,Mycobacterium abscessus ,bacterial infections and mycoses ,biology.organism_classification ,Real-Time Polymerase Chain Reaction ,Virology ,Microbiology ,Real-time polymerase chain reaction ,Bacterial Proteins ,Clarithromycin ,Drug Resistance, Bacterial ,TaqMan ,medicine ,Humans ,Nontuberculous mycobacteria ,Molecular Biology ,Gene ,medicine.drug - Abstract
We have developed a single tube TaqMan(®) real-time PCR assay that differentiates the full-length and truncated erm(41) gene to predict inducible resistance to clarithromycin in Mycobacterium abscessus. A study of 87 clinical isolates found this assay to be 90.8% concordant to conventional drug susceptibility testing results for the prediction of inducible clarithromycin drug resistance.
- Published
- 2015
24. [Prevalence of human papillomavirus infection in women in Tibet Autonomous Region of China.]
- Author
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Qiong, Jin, Keng, Shen, Hui, Li, Xian-Rong, Zhou, Hui-Fang, Huang, Jin-Hua, Leng, Wen-Hua, Zhang, Xiao-Ming, Gong, Xue-Mei, Cheng, Lang, Suo, Yan-Chun, Zhu, Jing-He, Lang, Chong-Mei, Lu, Ping, Wang, and Wen-Xiu, Mo
- Subjects
China ,DNA, Viral ,Papillomavirus Infections ,Prevalence ,Humans ,Female ,Tibet - Abstract
To determine the prevalence of cervical type-specific human papillomavirus (HPV) infection as well as risk factors associated in Tibet Autonomous Region of China.A cluster sampling study was performed in Lasa, Rikaze and Naqu of Tibet. An epidemiological questionnaire was applied and 3036 cervical specimens were obtained for liquid-based cytology and HPV DNA detection. Statistical analysis included Wald Chi-square and stepwise logistic regression model.The overall HPV prevalence of involved 3036 women was 9.19% (279/3036), of which 7.05% (214/3036) of the women were infected by high-risk types (including 14 sorts of types) and 2.14% (65/3036) by low-risk types (including 6 sorts of types). There were no significant differences of HPV prevalence between age groups (P = 0.936), race (P = 0.718) and areas (P = 0.746), respectively. Twenty-one types of HPV were detected, of which HPV16 (1.52%) was the most common type, followed by HPV33 (1.42%), HPV58 (1.22%), HPV52 (1.15%), and HPV31 (1.05%). HPV type distribution was varied by age. Of the 279 HPV infected women, 14.3% (40/279) exhibited multiple HPV infections. Independent risk factors for HPV infection were smoking (P = 0.027), number of sex partners (P = 0.198) and early age of first intercourse (P = 0.237).The overall prevalence of HPV infection in Tibet Autonomous Region is lower than that in China or abroad, in which the most common genotype is HPV16 and the independent risk factors for HPV infection included early age of first intercourse, smoking, and number of sex partners.
- Published
- 2010
25. DEVICE UTILIZING A PID CONTROLLER, CONTROL METHOD THEREOF, AND ROBOT UTILIZING THE CONTROLLER
- Author
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Yuan-Che Hsu and Yan-Chun Zhu
- Subjects
Vibration ,Acoustics and Ultrasonics ,Arts and Humanities (miscellaneous) ,Computer science ,Control theory ,Position (vector) ,mental disorders ,Robot ,PID controller ,Object (computer science) ,psychological phenomena and processes ,Control methods - Abstract
A control method utilizing a PID controller includes detecting the position of an object and obtaining the position deviation by comparison with a predetermined position value, detecting the vibration of the object and obtaining a vibration value, adjusting the control parameters of the PID controller by analyzing the position deviation, the vibration value, and a predetermined performance of the PID controller, and the PID controller responding to the adjusted control parameters.
- Published
- 2012
26. Preparation and structural characterization of a series of monoacylhydrazidate-bridged coordination polymers
- Author
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Yan-Chun Zhu, Jie-Hui Yu, Ji-Qing Xu, Yang Yu, Di Wu, and Qin Hou
- Subjects
chemistry.chemical_classification ,Ligand ,Hydrazine ,Inorganic chemistry ,Polymer ,Time-dependent density functional theory ,Medicinal chemistry ,Hydrothermal circulation ,Inorganic Chemistry ,Acylation ,chemistry.chemical_compound ,chemistry ,Transition metal ,Hydrate - Abstract
From the simple hydrothermal reactions of metal salts, organodicarboxylic acids and hydrazine hydrate sometimes in the presence of 1,10-phenanthroline (phen), a series of monoacylhydrazidate-containing complexes including three Pb(II) coordination polymers as 1-D chained [Pb(2)(PTH)(4)(phen)(2)].H(2)O (PTH = phthalhydrazidate) , 1-D ribboned [Pb(2,3-PDH)(2)] (2,3-PDH = pyridine-2,3-dicarboxylhydrazidate) and 3-D grid-like [Pb(3,4-PDH)(2)] (3,4-PDH = pyridine-3,4-dicarboxylhydrazidate) as well as several transition metal complexes as 2-D layered [Cu(PTH)] , mononuclear [M(2,3-PDH)(2)(H(2)O)(2)] (M = Mn , Co and Zn ) and mononuclear [Mn(H(2)O(6))] (PTH)(2).4H(2)O were obtained. The monoacylhydrazidate ligands were synthesised from hydrothermal in situ acylation reactions between organodicarboxylic acids and hydrazine hydrate. All of the title compounds were characterized by CHN analysis, IR analysis and TG analysis, and compounds were characterized by X-ray single-crystal diffraction. The fluorescence properties of compounds and with the PTH ligand were investigated. TDDFT calculations were carried out on the excited electronic states of compound in order to understand the emission mechanism.
- Published
- 2009
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