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Load Bearing Capacity and Safety Analysis for Strain-hardening Austenitic Stainless Steel Pressure Vessels

Chinese Journal of Mechanical Engineering 2011年第2期24卷 179-186页

作者： chen Gang deng Yangchun China Special Equipment Safety Supervision Administration General Administration of Quality Supervision and Inspection and Quarantine of the People＇s Republic of China Beijing 100088 China Hubei Provincial Special Equipment Safety Inspection and Research Institute Wuhan 430077 China

By increasing the yield strengths of austenitic stainless steels for pressure vessels with strain hardening techniques,the elastic load bearing capacity of austenitic stainless steel pressure vessels can be significantly *** kinds of strain hardening methods are often used for austenitic stainless steel pressure vessels：Avesta model for ambient temperature applications and Ardeform model for cryogenic temperature *** methods are obtained from conventional design rules based on the linear elastic theory,and only consider the hardening effect from *** this limits the applications of strain hardening techniques for austenitic stainless steel pressure vessels because of safety *** paper investigates the effect of strain hardening on the load bearing capacity of austenitic stainless steel pressure vessels under large deformation,based on the elastic-plastic ***,to understand the effect of strain hardening on material behavior,the plastic instability loads of a round tensile bar specimen are derived under two different loading paths and validated by ***,to investigate the effect of strain hardening on pressure vessels strength, the plastic instability pressure under strain hardening is derived and further validated by finite element ***,the safety margin of pressure vessels after strain hardening is analyzed by comparing the safety factor values calculated from bursting tests,finite element analyses,and *** researching results show that the load bearing capacity of pressure vessels at ambient temperature is independent of the loading history when the effects of both material strain hardening and structural deformation are *** element simulations and bursting tests results show that the minimum safety factor of austenitic stainless steel pressure vessels with 5% strain hardening is close to the recommended value for common pressure vessels specified in th

关键词： pressure vessel austenitic stainless steel strain hardening load bearing capacity safety margin

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In-plane dipolar nano-antenna steers polariton waves at nanoscale

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Light(Science & Applications) 2023年第11期12卷 2269-2271页

作者： Huanjun chen Shaozhi deng State Key Laboratory of Optoelectronic Materials and Technologies Guangdong Province Key Laboratory of Display Material and TechnologySchool of Electronics and Information TechnologySun Yat-sen UniversityGuangzhou 510275China

Hyperbolic polaritons can be launched and guided into mirror-symmetric-broken trajectories using an in-plane dipolar nano-antenna,and this asymmetry can be configured by adjusting the polarization direction of the in-... 详细信息

关键词： moment. plane polar

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Distributed Oblivious Function Evaluation and Its Applications

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Journal of Computer Science & Technology 2004年第6期19卷 942-947页

作者： hong-DaLi XiongYang deng-GuoFeng BaoLi StateKeyLabofInformationSecurity GraduateSchoolofChineseAcademyofSciencesBeijing100039P.R.China CollegeofEconomyandTrade SouthChinaUniversityofTropicalAgricultureSanya571737P.R.China

This paper is about distributed oblivious function evaluation (DOFE). In this setting one party (Alice) has a functionf(x), and the other party (Bob) with an input α wants to learnf(α) in an oblivious way with the help of a set of servers. What Alice should do is to share her secret functionf(x) among the servers. Bob obtains what he should get by interacting with the servers. This paper proposes the model and security requirements for DOFE and analyzes three distributed oblivious polynomial evaluation protocols presented in the paper. Keywords oblivious function evaluation - oblivious polynomial evaluation - secure multiparty computation - distributed - information security The research is supported by the National Basic Research 973 Program of China under Grant No. 1999035802 and the National Natural Science Foundation of China under Grant No.60273029.hong-Da Li was born in 1960. He received the Ph.D. degree from Northwestern Polytechnical University in 2001. His current research interests are cryptology and cryptographic protocol.Xiong Yang received the B.S. degree in mathematics from Yan'an University, China, in 1984. He is an associate professor in College of Economy and Trade at South China University of Tropical Agriculture. His research interest is information security.deng-Guo Feng was born in 1963. He is now a Ph.D. supervisor. His research interests focus on information security.Bao Li was born in 1965. He received the Ph.D. degree in cryptography in 1995 from Xidian University. His research interests include cryptographic protocols and public key cryptosystems.

关键词： oblivious function evaluation oblivious polynomial evaluation secure multiparty computation distributed information security

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Metabolomic characteristics of spontaneously hypertensive rats under chronic stress and the treatment effect of Danzhi Xiaoyao Powder, a traditional Chinese medicine formula

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Journal of Integrative Medicine 2022年第1期20卷 73-82页

作者： Shuai chen Jin Hu deng-cheng Lu hong-yi Liu Shan-shan Wei College of Basic Medical Sciences Yunnan University of Chinese MedicineKunming 650500Yunnan ProvinceChina Department of Endocrinology Yunnan Provincial Hospital of Traditional Chinese MedicineKunming 650021Yunnan ProvinceChina Key Laboratory of Syndrome Micro-Differentiation of Yunnan Province Kunming 650500Yunnan ProvinceChina

Objective: Numerous studies have demonstrated the close relationship between chronic stress and blood pressure(BP). Hypertensive subjects exhibit exaggerated reactions to stress, especially higher BP. The mechanisms by which stress affects pre-existing hypertension still need to be explored. Danzhi Xiaoyao Powder(DP), a historical traditional Chinese medicine formula, is a promising treatment for BP control in hypertensive patients under stress. The present study investigated the metabolomic disruption caused by chronic stress and the treatment effect and mechanism of ***: Spontaneously hypertensive rats(SHRs) were subjected to chronic restraint stress(CRS) for 4 weeks. BP was measured via the tail-cuff method, and anxiety-like behavior was quantified using the elevated-plus-maze test. Meanwhile, DP was administered intragastrically, and its effects were observed. Global metabolomic analysis was performed using ultra-high-performance liquid chromatography-quadrupole time-of-flight mass spectrometry, followed by multivariate statistical analysis to detect differential metabolites and ***: DP alleviated the CRS-induced increase in BP and anxiety-like behavior. Systematic metabolic differences were found among the three study groups. A total of 29 differential plasma metabolites were identified in both positive-and negative-ion modes. These metabolites were involved in triglyceride metabolism, amino acid(phenylalanine, tryptophan, and glycine) metabolism, and steroid hormone ***: These findings expose the metabolomic disturbances induced by chronic stress in SHRs and suggest an innovative treatment for this disorder.

关键词： Hypertension Stress Metabolomics Danzhi Xiaoyao Powder

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A Facile Way to Large-scale Production of Few-layered Graphene via Planetary Ball Mill

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Chinese Journal of Polymer Science 2016年第10期34卷 1270-1280页

作者： sha deng xiao-dong qi yan-ling zhu hong-ju zhou feng chen 傅强 College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering Sichuan University Chengdu 610065 China

Abstract In the field of polymer/graphene nanocomposites, massive production and commercial availability of graphene are essential. Exfoliation of graphite to obtain graphene is one of the most promising ways to large-scale production at extremely low cost. In this work we illustrate a facile strategy for mass production of few-layered （≤ 10） graphene （FLG） via the newly explored ball milling. The achieved FLG concentration was determined by UV/Vis spectroscopy. The formation of FLG was proved by measuring the flake thickness by atomic force microscopy （AFM）. Further Raman spectral studies indicated that the crystal structure of exfoliated flakes was preserved satisfactorily during this shear-force dominating process. To increase the maximum concentration obtainable, it＇s critical to make a good parameter assessment. N-methylpyrrolidone （NMP） was used as a dispersing medium and the effect of milling parameters was systematically and quantitatively investigated, thus providing a criterion to optimize the milling process. We established the optimal values for solvent volume and initial weight of graphite. As for milling time, the production of FLG was enhanced with continuous milling according to the power law, but not linearly with increasing milling time. Moreover, the possible mechanism involved in milling process was also explored. Our work provides a simple method for graphite exfoliation and has great potential for improving thermal and electrical conductivity of polymer composites in the fields of engineering.

关键词： Polymer/graphene nanocomposites Ball milling Mass production Milling parameters.

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Atp6i deficient mouse model uncovers transforming growth factor-β1/Smad2/3 as a key signaling pathway regulating odontoblast differentiation and tooth root formation

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International Journal of Oral Science 2023年第3期15卷 390-400页

作者： Jue Wang Abigail McVicar Yilin chen hong-Wen deng Zhihe Zhao Wei chen Yi-Ping Li Department of Pathology School of MedicineUniversity of Alabama at BirminghamBirminghamALUSA State Key Laboratory of Oral Diseases&National Center for Stomatology&National Clinical Research Center for Oral Diseases&Department of Orthodontics West China Hospital of StomatologySichuan UniversityChengduChina Division in Cellular and Molecular Medicine Department of Pathology and Laboratory MedicineTulane University School of MedicineTulane UniversityNew OrleansLAUSA Tulane Center of Biomedical Informatics and Genomics Deming Department of MedicineTulane University School of MedicineNew OrleansLAUSA

The biomolecular mechanisms that regulate tooth root development and odontoblast differentiation are poorly *** found that Atp6i deficient mice(Atp6i^(−/−))arrested tooth root formation,indicated by truncated Hertwig’s epithelial root sheath(HERS)***,Atp6i deficiency significantly reduced the proliferation and differentiation of radicular odontogenic cells responsible for root ***6i^(−/−)mice had largely decreased expression of odontoblast differentiation marker gene expression profiles(Col1a1,Nfic,Dspp,and Osx)in the alveolar ***6i^(−/−)mice sample RNA-seq analysis results showed decreased expression levels of odontoblast ***,there was a significant reduction in Smad2/3 activation,inhibiting transforming growth factor-β(TGF-β)signaling in Atp6i^(−/−)*** treating pulp precursor cells with Atp6i^(−/−)or wild-type OC bone resorption-conditioned medium,we found the latter medium to promote odontoblast differentiation,as shown by increased odontoblast differentiation marker genes expression(Nfic,Dspp,Osx,and Runx2).This increased expression was significantly blocked by anti-TGF-β1 antibody neutralization,whereas odontoblast differentiation and Smad2/3 activation were significantly attenuated by Atp6i^(−/−)OC conditioned ***,ectopic TGF-β1 partially rescued root development and root dentin deposition of Atp6i^(−/−)mice tooth germs were transplanted under mouse kidney ***,our novel data shows that the prevention of TGF-β1 release from the alveolar bone matrix due to OC dysfunction may lead to osteopetrosis-associated root formation via impaired radicular odontoblast *** such,this study uncovers TGF-β1/Smad2/3 as a key signaling pathway regulating odontoblast differentiation and tooth root formation and may contribute to future therapeutic approaches to tooth root regeneration.

关键词： Smad2/3 impaired prevention

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Left bundle branch pacing with optimization of cardiac resynchronization treatment:A case report

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World Journal of Clinical Cases 2020年第18期8卷 4266-4271页

作者： deng-hong Zhang Ming-Jian Lang Gang Tang Xiao-Xiao chen hong-Fei Li Department of Cardiovascular Medicine Chengdu Fifth People's HospitalChengdu 611130Sichuan ProvinceChina

BACKGROUND Cardiac resynchronization therapy(CRT)is a well-established therapy for patients with *** SUMMARY The patient underwent left bundle branch area and left ventricular(reaching the left ventricular lateral vein through the coronary sinus)*** optimal CRT was performed under the right bundle branch of the patient by adjusting the optimal a-v and v-v interphases to achieve the maximal benefit of the *** The patient was diagnosed with left bundle branch block and heart failure.A left bundle branch area pacemaker assisted in correcting the complete left bundle branch ***,the shorter QRS wave shape after pacemaker implantation through the left bundle branch area indicated a complete right bundle branch block ***,the left bundle branch area pacemaker is not always considered as the optimal *** left bundle branch pacing with the optimization of cardiac resynchronization treatment may serve as a new CRT strategy.

关键词： Cardiac resynchronization therapy Cardiomyopathy Left bundle branch Case report

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Quasi-in-situ Observation and SKPFM Studies on Phosphate Protective Film and Surface Micro-Galvanic Corrosion in Biological Mg-3Zn-xNd Alloys

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Acta Metallurgica Sinica(English Letters) 2024年第4期37卷 648-664页

作者： Zhaochen Yu Kaixuan Feng Shuyun deng Yang chen hong Yan honggun Song Chao Luo Zhi Hu School of Advanced Manufacturing Nanchang UniversityNanchang330031China Institute for Advanced Study Nanchang UniversityNanchang330031China

The phosphate protective film and micro-galvanic corrosion of biological Mg-3Zn-xNd (x = 0, 0.6, 1.2) alloys were investigated by scanning and transmission electron microscopy, quasi-in-situ observation, scanning Kelvin probe force microscopy (SKPFM) and electrochemical tests. The results revealed the Mg-Zn-Nd phases formed in Mg-3Zn alloy contained with Nd. Adding Nd resulted in a significant decline in the cracks of the phosphate protective film and micro-galvanic corrosion of alloys, which were recorded by quasi-in-situ observation. In addition, the Volta potential difference of Mg-Zn-Nd/α-Mg (~ 188 mV) was lower than MgZn/α-Mg (~ 419 mV) and Zn-rich/α-Mg (~ 260 mV), and the corrosion rates of alloys markedly decreased after the addition of 0.6 wt% Nd. The improvement in corrosion resistance of Nd-containing alloys was mainly attributed to the following: (i) the addition of Nd reduced the Volta potential difference (second phases/α-Mg);(ii) the phosphate protective film containing Nd_(2)O_(3) deposited on the surface of the alloys, effectively preventing the penetration of harmful anions.

关键词： Magnesium alloys Quasi-in-situ observation Phosphate protective film Scanning Kelvin probe force microscopy(SKPFM) Micro-galvanic corrosion

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High‑Entropy Electrode Materials:Synthesis,Properties and Outlook

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Nano-Micro Letters 2025年第1期17卷 472-506页

作者： Dongxiao Li Chang Liu Shusheng Tao Jieming Cai Biao Zhong Jie Li Wentao deng hongshuai Hou Guoqiang Zou Xiaobo Ji College of Chemistry and Chemical Engineering Central South UniversityChangsha 410083People’s Republic of China School of Chemistry and Chemical Engineering Hunan Institute of EngineeringXiangtan 411104People’s Republic of China

High-entropy materials represent a new category of high-performance materials,first proposed in 2004 and extensively investigated by researchers over the past two *** definition of high-entropy materials has continuously *** the last ten years,the discovery of an increasing number of high-entropy materials has led to significant advancements in their utilization in energy storage,electrocatalysis,and related domains,accompanied by a rise in techniques for fabricating high-entropy electrode ***,the research emphasis has shifted from solely improving the performance of high-entropy materials toward exploring their reaction mechanisms and adopting cleaner preparation ***,the current definition of high-entropy materials remains relatively vague,and the preparation method of high-entropy materials is based on the preparation method of single metal/low-or medium-entropy *** should be noted that not all methods applicable to single metal/low-or medium-entropy materials can be directly applied to high-entropy *** this review,the definition and development of high-entropy materials are briefly ***,the classification of high-entropy electrode materials is presented,followed by a discussion of their applications in energy storage and catalysis from the perspective of synthesis ***,an evaluation of the advantages and disadvantages of various synthesis methods in the production process of different high-entropy materials is provided,along with a proposal for potential future development directions for high-entropy materials.

关键词： High-entropy Energy storage Electrode materials

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Integrated Co3O4/carbon fiber paper for high-performance anode of dual-ion battery

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Journal of Energy Chemistry 2019年第10期28卷 7-12页

作者： Lu Sui Xiaoyuan Shi Ting deng He Yang hongyan Liu hong chen Wei Zhang Weitao Zheng Key Laboratory of Mobile Materials MOE School of Materials Science & Engineering Electron Microscopy Center International Center of Future Science Jilin University

In dual-ion batteries (DIBs), energy storage is achieved by intercalation/de-intercalation of both cations and anions. Due to the mismatch between ion diameter and layer space of active materials, however, volume expansion and exfoliation always occur for electrode materials. Herein, an integrated electrode Co3O4/carbon fiber paper (CFP) is prepared as the anode of DIB. As the Co3O4 nanosheets grow on CFP substrate vertically, it promotes the immersion of electrolyte and shortens the pathway for ionic transport. Besides, the strong interaction between Co3O4 and CFP substrate reduces the possibility of sheet exfoliation. An integrated-electrode-based DIB is therefore packaged using Co3O4/CFP as anode and graphite as cathode. As a result, a high energy density of 72 Wh/kg is achieved at a power density of 150 W/kg. The design of integrated electrode provides a new route for the development of high-performance DIBs.

关键词： Integrated electrode Dual-ion batteries Co3O4 Anode Carbon fiber paper

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