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Supercritical carbon dioxide as a new working medium for pneumatic launch:A theoretical study

Defence Technology（防务技术） 2021年第4期17卷 1296-1306页

作者： hong-xin Yao Xue-zhong Wei hong Ye Department of Thermal Science and Energy Engineering University of Science and Technology of ChinaHefei230027People’s Republic of China

Compared with the conventionally gaseous or liquid working media,the specific internal energy of supercritical carbon dioxide(SCD)is higher at the same temperature and pressure,and the critical temperature of carbon dioxide is close to room temperature,making SCD a potential new working medium for pneumatic *** analyze the feasibility of this conception,an analytical model of a pneumatic catapult is established on basis of the conservations of mass and *** model consists of a high-pressure chamber and a low-pressure chamber connected by multiple valves,and there is a movable piston in the low-pressure chamber that can push an aircraft to *** effects of the launch readiness state of SCD in the high-pressure chamber,the initial volume of the low-pressure chamber and the valve control on the movement of the aircraft are *** is found that there is a restrictive relation between the temperature and pressure of the launch readiness state of SCD,i.e.,there is a maximum allowable launch readiness pressure when the launch readiness temperature is *** this restrictive relation is not satisfied,the working medium in the low-pressure chamber will drop to its triple point within a few milliseconds,leading to a launch *** to this restrictive relation,there is an optimal launch readiness state of SCD with the highest working capacity for any allowable launch readiness *** pressure of the low-pressure chamber will decrease significantly as the initial volume increases,leading to a decreased acceleration of the *** acceleration can be controlled below a critical value by a designed sequential blasting technique of multiple *** calculated results show that a 500 kg aircraft can be accelerated from 0 to 58 m/s in 0.9 s with 36 kg of carbon *** research provides a new technique for the controllable cold launch of an aircraft.

关键词： Pneumatic launch Supercritical carbon dioxide Restrictive relation of the launch readiness state Optimal launch readiness state High working capacity

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Dual-function antibacterial surfaces to resist and kill bacteria:Painting a picture with two brushes simultaneously

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Journal of Materials Science & Technology 2021年第11期70卷 24-38页

作者： Yi zou Yanxia Zhang Qian Yu hong Chen Institute for Cardiovascular Science and Department of Cardiovascular Surgery of the First Affiliated Hospital Soochow UniversitySuzhou 215007China State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials College of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China

Attachment of bacteria and subsequent formation of biofilms on material surfaces lead to serious consequences including infection,contamination and biofouling,posing a prominent threat to human health and causing problems in many ***,it is highly desirable to endow the surfaces with antibacterial *** antibacterial surfaces are designed via either bacteria-resisting strategy to prevent the initial adhesion of bacteria or bacteria-killing strategy to eradicate any bacteria that attach to the ***,these single-function surfaces have their inherent shortcomings and cannot realize long-term efficacy against *** recent years,various dual-function antibacterial surfaces with both bacteria-resisting and bacteria-killing properties together have been developed,showing better performance for combating surface-attached bacteria and preventing formation of *** this review,we summarize the recent development of these dual-function antibacterial *** focus on the design principles and fabrication strategies of such surfaces and highlight the representative examples,which are categorized specifically into two types according to the anti-adhesive and bactericidal properties are simultaneous or switchable.A brief perspective is finally presented on current challenges and future research directions.

关键词： Antibacterial surfaces Bactericidal property Biocides Anti-adhesive Antifouling

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Fabricating Master with Reactive Ion Beam Etching Method

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Chinese Physics Letters 1998年第7期15卷 495-497页

作者： zou Zhi-qiang FANG hong-li FU xin-ding CHEN Guo-ming Shanghai Institute of Metallurgy Chinese Academy of SciencesShanghai 200050

The fabrication process of glass master or glass etching optical disk using reactive ion beam(RIB)etching method was *** was applied for image *** etching using CF4 gas transferred the pregrooves into the glass *** shape and depth of the pregrooves in the glass is a function of the RIB etcher settings.A glass substrate ofФ130mm with etched pregrooves(track pitch was 1.6μm and groove depth 0.1μm)was obtained,showing that a glass master or glass etching disc can be fabricated by this technique.

关键词： technique glass Master

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Deep Learning Deepens the Analysis of Alternative Splicing

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Genomics, Proteomics & Bioinformatics 2019年第2期17卷 219-221页

作者： Xudong zou xin Gao Wei Chen Department of Biology Southern University of Science and Technology Shenzhen 518055 China Computational Bioscience Research Center (CBRC) Computer Electrical and Mathematical Sciences and Engineering (CEMSE) Division King Abdullah University of Science and Technology (KAUST) Thuwal 23955 Saudi Arabia

The ever-increasing high-volume and high-dimensional geno-mics data on the one hand challenge traditional data analysis approaches,and on the other hand provide ample opportuni-ties for developing novel analytic strat... 详细信息

关键词： Deep Learning Deepens the Analysis Alternative Splicing

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Quality control of specific humidity from surface stations based on EOF and FFT—— Case study

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Frontiers of Earth Science 2015年第3期9卷 381-393页

作者： hong ZHAO Xiaolei zou Zhengkun QINl Center of Data Assimilation for Research and Application Nanjing University of Information Science & Technology Nanjing 210044 China Vlaryland College Park MD 20740-3-823 USA

Comparisons between observations and back- ground fields indicate that amplitude and phase differences in oscillations result in a non-Gaussian distribution in observation minus background vectors （OMB）. Empirical Orthogonal Function （EOF） quality control （QC） and Fast Fourier Transform （FFT） quality control are proposed from the perspective of data assimilation and are applied to the surface specific humidity from ground-based stations. The QC results indicate that the standard deviation between observations and background is reduced effectively, and the frequency distribution for the observation increment is closer to a normal distribution. The specific humidity outliers occur primarily in mountainous and coastal regions. Comparing the two QC methods, it is found that the EOF QC performs better than the FFT QC as it can keep large scale of fluctuation information from the original field, preventing these waves from entering into the residual field and being removed by the QC process.

关键词： specific humidity quality control EOF FFT

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Improved Prefix Based Format-Preserving Encryption for Chinese Names

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China Communications 2018年第3期15卷 78-90页

作者： Junwei zou Peng Wang hong Luo School of Electronic Engineering Beijing University of Posts and Telecommunications Beijing Key Laboratory of Intelligent Telecommunications Software and Multimedia Beijing University of Posts and Telecommunications

In the era of big data, government, business and personal digital information will be possible for data mining. Data mining requires massive data as a support. However, the direct release of the original mass data, which usually contain some sensitive information of personal or analysis, will result in leakage of user privacy. Therefore, it is becoming increasingly important to protect privacy information in data publishing. In this paper, we focus on the multi-type self-identified format-preserving encryption. First, we introduce a multi-type self-identified format-preserving encryption system and discuss the encryption of various types of data in this system. Then, for the format preserving encryption(FPE) about Chinese name, we study from the encryption model construction and basic encryption scheme. The format-preserving encryption model about Chinese name is constructed and the concept of the name library is presented. Based on this, it is used to not only limit the message space to reduce complexity, but also ensure the cipher in accordance with the Chinese naming habits. In addition, according to the encryption and decryption model, format-preserving encryption process of Chinese name is designed. In order to add new names, the algorithm of name space expansion is proposed. Based on the Prefix, this paper put forward an algorithm named Cycle-Prefix, which enhances the security and dynamics of FPE by using two adjustment factors and the circular encryption. Compared with the traditional Prefix algorithm, experiments show that Cycle-Prefix can not only complete the task of FPE for Chinese name, but also encrypt same plain text into different ciphers under the premise of similar efficiency with Prefix.

关键词： Chinese name format-preservingencryption name library encryption model

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Single-cell RNA-seq data analysis on the receptor ACE2 expression reveals the potential risk of different human organs vulnerable to 2019-nCoV infection

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Frontiers of Medicine 2020年第2期14卷 185-192页

作者： xin zou Ke Chen Jiawei zou Peiyi Han Jie Hao Zeguang Han Key Laboratory of Systems Biomedicine(Ministry of Education) Shanghai Centre for Systems BiomedicineShanghai Jiao Tong UniversityShanghai 200240China Ruijin Hospital Affiliated to Shanghai Jiao Tong University School of Medicine Shanghai 200025China

It has been known that,the novel coronavirus,2019-nCoV,which is considered similar to SARS-CoV,invades human cells via the receptor angiotensin converting enzyme II(ACE2).Moreover,lung cells that have ACE2 expression may be the main target cells during 2019-nCoV ***,some patients also exhibit non-respiratory symptoms,such as kidney failure,implying that 2019-nCoV could also invade other *** construct a risk map of different human organs,we analyzed the single-cell RNA sequencing(scRNA-seq)datasets derived from major human physiological systems,including the respiratory,cardiovascular,digestive,and urinary *** scRNA-seq data analyses,we identified the organs at risk,such as lung,heart,esophagus,kidney,bladder,and ileum,and located specific cell types(i.e.,type II alveolar cells(AT2),myocardial cells,proximal tubule cells of the kidney,ileum and esophagus epithelial cells,and bladder urothelial cells),which are vulnerable to 2019-nCoV *** on the findings,we constructed a risk map indicating the vulnerability of different organs to 2019-nCoV *** study may provide potential clues for further investigation of the pathogenesis and route of 2019-nCoV infection.

关键词： 2019-nCoV ACE2 single-cell RNA-seq

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Exact Fixed-node Quantum Monte Carlo： Differential Approach

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Chinese Journal of Chemistry 2005年第11期23卷 1474-1478页

作者： HUANG, hong-xin College of Chemistry and Chemical Technology Hunan Normal University Changsha Hunan 410081 China

A differential approach for exact fixed-node quantum Monte Carlo calculation was proposed in this paper. This new algorithm can be used to directly compute the energy differential between two systems in exact fixed-node quantum Monte Carlo process, making the statistical error of calculation reduce to order of 10^-2 kJ/mol and recover about more than 90% of the correlation energy. The approach was employed to set up a potential energy surface of a molecule, through a model of rigid move, and Jacobi transformation utilized to make energy calculation for two configurations of a molecule having good positive correlation. So, an accurate energy differential could be obtained, and the potential energy surface with good quality depicted. This novel algorithm was used to study the potential energy curve of the ground state of BH and the potential energy surface of H3, and could be also applied to study other related fields such as molecular spectroscopy and the energy variation of chemical reactions.

关键词： exact fixed-node quantum Monte Carlo differential approach correlation sampling potential energy surface

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Exploring Nanoscale Perovskite Materials for Next‑Generation Photodetectors:A Comprehensive Review and Future Directions

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Nano-Micro Letters 2025年第2期17卷 46-108页

作者： xin Li Sikandar Aftab Maria Mukhtar Fahmid Kabir Muhammad Farooq Khan Hosameldin Helmy Hegazy Erdi Akman State Key Laboratory of Pulsed Power Laser Technology National University of Defense TechnologyHefei 230037AnhuiPeople’s Republic of China Anhui Laboratory of Advanced Laser Technology Hefei 230037AnhuiPeople’s Republic of China Nanhu Laser Laboratory Changsha 410015HunanPeople’s Republic of China Department of Semiconductor Systems Engineering and Clean Energy Sejong UniversitySeoul 05006Republic of Korea Department of Artificial Intelligence and Robotics Sejong UniversitySeoul 05006Republic of Korea School of Engineering Science Simon Fraser UniversityBurnabyBC V5A 1S6Canada Department of Electrical Engineering Sejong UniversitySeoul 05006South Korea Department of Physics Faculty of ScienceKing Khalid UniversityP.O.Box 9004AbhaSaudi Arabia Central Labs King Khalid UniversityAlQura’aP.O.Box 96061413 AbhaSaudi Arabia Scientific and Technological Research and Application Center Karamanoglu Mehmetbey University70100 KaramanTurkey

The rapid advancement of nanotechnology has sparked much interest in applying nanoscale perovskite materials for photodetection *** materials are promising candidates for next-generation photodetectors(PDs)due to their unique optoelectronic properties and flexible synthesis *** review explores the approaches used in the development and use of optoelectronic devices made of different nanoscale perovskite architectures,including quantum dots,nanosheets,nanorods,nanowires,and *** a thorough analysis of recent literature,the review also addresses common issues like the mechanisms underlying the degradation of perovskite PDs and offers perspectives on potential solutions to improve stability and scalability that impede widespread *** addition,it highlights that photodetection encompasses the detection of light fields in dimensions other than light intensity and suggests potential avenues for future research to overcome these obstacles and fully realize the potential of nanoscale perovskite materials in state-of-the-art photodetection *** review provides a comprehensive overview of nanoscale perovskite PDs and guides future research efforts towards improved performance and wider applicability,making it a valuable resource for researchers.

关键词： Nanoscale perovskites Photodetectors Nanosheets Nanorods Nanowires Quantum dots Nanocrystals

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New < q,n|| Representation for Studing Two-Mode Nonlinear Phase Operator

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Chinese Physics Letters 1999年第8期16卷 547-549页

作者： fan hong-yi zou Hui Department of Materials Science and Engineering University of Science and Technology of ChinaHefei 230026

A new complete and orthonormal < n|). The corresponding phase state is also obtained, which is quaJified to make up a phase representation.

关键词： representation. operator phase

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