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Journal of Thermal Science 2023年第6期32卷 2144-2154页

作者： ZHANG Xinxin Li Yang MOE key laboratory of enhanced heat transfer and energy conservation Beijing University of TechnologyBeijing100124China Beijing key laboratory of heat transfer and energy conversion Beijing University of TechnologyBeijing100124China

Condensation temperature is one of the crucial parameters determining the performance of an organic Rankine cycle.It is necessary to consider the differences in the working fluids themselves when setting the condensation temperature of organic Rankine cycle.In current study,temperature-entropy(T-s)diagram is employed to describe the difference in working fluids.Three areas of dry and isentropic fluids in a temperature-entropy(T-s)diagram,which are the area denoting net output work of cycle(A_(1),the area denoting net output work of the Carnot cycle(A),and the curved triangle in superheated region denoting condensation characteristics(A_(2)),are defined.On this basis,the ratio of A_(2)to A_(1)and the ratio of A_(1)to A are calculated.Logarithmic Mean Difference of the above two ratios is obtained to determine the operable ideal condensation temperature of 66 dry and isentropic fluids employed in Organic Rankine Cycle.The findings indicate that the operable ideal condensation temperatures for the majority of dry and isentropic fluids are in the range of 305 K to 310 K.The work presented in this study may be useful for designing and establishing an Organic Rankine Cycle system.

关键词： organic Rankine cycle T-s(temperature-entropy)diagram condensation temperature dry f isentropic fluids logarithmic mean difference

Recent progress in functional modification and crosslinking of bioprosthetic heart valves

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Regenerative Biomaterials 2024年第1期3卷 1-16页

作者： Cheng Zheng Li Yang Yunbing Wang National Engineering Research Center for Biomaterials Sichuan UniversityChengdu 610064China

Valvular heart disease(VHD),clinically manifested as stenosis and regurgitation of native heart valve,is one of the most prevalent cardiovascular diseases with high mortality.Heart valve replacement surgery has been recognized as golden standard for the treatment of VHD.Owing to the clinical application of transcatheter heart valve replacement technic and the excellent hemodynamic performance of bioprosthetic heart valves(BHVs),implantation of BHVs has been increasing over recent years and gradually became the preferred choice for the treatment of VHD.However,BHVs might fail within 10-15 years due to structural valvular degeneration(SVD),which was greatly associated with drawbacks of glutaraldehyde crosslinked BHVs,including cytotoxicity,calcification,component degradation,mechanical failure,thrombosis and immune response.To prolong the service life of BHVs,much effort has been devoted to overcoming the drawbacks of BHVs and reducing the risk of SVD.In this review,we summarized and analyzed the research and progress on:(i)modification strategies based on glutaraldehyde crosslinked BHVs and(ii)nonglutaraldehyde crosslinking strategies for BHVs.

关键词： bioprosthetic heart valves modification crosslinking anticalcification antithrombosis

康德哲学视点下人工智能生成物的著作权问题探讨

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法学杂志 2018年第9期39卷 43-54页

作者：李扬李晓宇中山大学法学院广东广州510275

康德"主客体统一认识论"和"人是目的"哲学视点下,无论人工智能发展到何种阶段,都只能作为人利用的客体和工具处理,而不能将其拟制为与人享有平等地位的法律主体。以此为前提,人工智能生成物应当作为人利用人工智能创作的作品并按照现行... 详细信息

康德"主客体统一认识论"和"人是目的"哲学视点下,无论人工智能发展到何种阶段,都只能作为人利用的客体和工具处理,而不能将其拟制为与人享有平等地位的法律主体。以此为前提,人工智能生成物应当作为人利用人工智能创作的作品并按照现行著作权法关于作品的构成要件判断其独创性。在人工智能生成物构成作品的情况下,应按照现行著作权法关于著作权归属的原则处理其权利归属,即人工智能生成物的著作权原则上归属于利用人工智能进行作品创作的作者(自然人或者法人或者非法人单位),例外情况下属于雇主或者委托人。

关键词：康德哲学人工智能生成物主体资格法律属性权利分配

Effect of Skeleton Grain Size on the Saturation of Gas Hydrate in Natural Sediments

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Journal of Ocean University of China 2024年第3期23卷 676-682页

作者： XU Zhenqiang Li Yang College of Marine Sciences Ocean University of ChinaQingdao 266100China China Petroleum&Chemical Corporation Beijing 100728China

Natural gas hydrate is prospected as a new and promising,highly clean energy resource that mainly occurs in perma-frost or at continental margins.Its formation is subject to many soil conditions,such as grain size,matrix materials,pore morphology,and permeability.In this study,we propose that grain size is the most decisive parameter that affects the saturation of gas hydrate in sediments based on data from Ocean Drilling Program Leg 164 and Mallik 5L-38,which represent marine sediments and terrestrial sediments,respectively.Our study reveals that high gas hydrate saturation generally occurs in coarse-grained sand,regardless of whether sediment formation is homogeneous or inhomogeneous,and the sorting of sediments may affect the hydrate saturation to a certain degree.Using grain size and sorting of sediments may be the most intuitive proxy method for a rough estimation of hydrate saturation.Further study is necessary to fully understand the relationship between hydrate morphology and sediment grain size,even though massive hydrates are typically found in fine clayey-rich sediments.

关键词： grain size saturation gas hydrates ODP Leg 164 Mallik 5L-38

Effect on ion-trap quantum computers from the quantum nature of the driving field

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Science China(Information Sciences) 2020年第10期63卷 219-233页

作者： Biyao yang Li Yang State Key Laboratory of Information Security Institute of Information EngineeringChinese Academy of Sciences State Key Laboratory of Cryptology School of Cyber Security University of Chinese Academy of Sciences

In this study, we evaluate the effect on ion-trap quantum computers（QCs） from the quantum nature of the driving field, and propose a theoretical limit for ion-trap QCs that may impact the design of quantum algorithms and realization of practical QCs. We obtain, for the first time, the permitted depth of logical operation for fault-tolerant ion-trap QCs. Physically, we provide an exact（full-quantum） description of the QC system, and present for the first time its time evolution after gate operations; mathematically,we solve problems such as certain summations of trigonometric series with any given precision. Comparing the actual state after CNOT gates driven by a quantized field with the expected state, we obtain the failure probability and estimate that the number of CNOT gates on the same pair of physical qubits is not more than 10;in one error-correction period, which is a physical limit that cannot be easily overcome. The conclusion can help determine the number of CNOT operations between coding and decoding in one error-correction period and can be used as a reference for quantum algorithm design.

关键词： quantum computing ion-trap quantum algorithm fault-tolerant quantum computation threshold theorem permitted depth of logical operation

Research on novel pressurized fiber Bragg grating static level based on circular structure

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Optoelectronics Letters 2023年第6期19卷 321-326页

作者： XIANG Shaojun Li Yang XIA Zhiyin yang Yan China Communications Construction Company Second Highway Consultants Co. Ltd.Wuhan 430056China School of Precision Instrument and Opto-electronics Engineering Tianjin UniversityTianjin 300072China National Engineering Research Center of Fiber Optic Sensing Technology and Networks Wuhan University of TechnologyWuhan 430070China

The static levelling system has significant value in the settling measurement of the structures.A novel pressurized static level based on circular structure is designed by using fiber Bragg grating(FBG)sensing technology in this research.The variation of the level pressure in the connecting vessel can be transmitted through the diaphragm to the FBG of the circular ring.The Ritz method is used to calculate the lateral deformation of the circular ring under the concentrated force,constructing the theoretical sensitivity model of the sensor.Further,finite element simulation and static experiments are applied to modify and verify it.According to the experimental data,two FBGs arranged horizontally along the circular ring,multiplying the sensitivity of the FBG static level to about 4.75 pm/mm,while the resolution can reach 0.02 mm.In addition,the temperature compensation of the sensor can be realized by the synergistic change of the measurement point and the reference point within the system of connecting vessel.

关键词： fiber circular connecting

Scalable solid-phase synthesis of defect-rich graphene for oxygen reduction electrocatalysis

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Green Energy & Environment 2023年第1期8卷 224-232页

作者： Chunxiao Dong Li Yang Cheng lian Xiaoling yang Yihua Zhu Hongliang Jiang Chunzhong li Shanghai Engineering Research Center of Hierarchical Nanomaterials School of Materials Science and EngineeringEast China University of Science and TechnologyShanghai200237China Key Laboratory for Ultrafine Materials of Ministry of Education School of Chemical EngineeringEast China University of Science and TechnologyShanghai200237China Institutes of Physical Science and Information Technology Anhui UniversityHefeiAnhui230601China School of Chemistry and Molecular Engineering East China University of Science and TechnologyShanghai200237China

Defect-engineered carbon materials have been emerged as promising electrocatalysts for oxygen reduction reaction(ORR)in metal-air batteries.Developing a facile strategy for the preparation of highly active nanocarbon electrocatalysts remains challenging.Herein,a low-cost and simple route is developed to synthesize defective graphene by pyrolyzing the mixture of glucose and carbon nitride.Molecular dynamics simulations reveal that the graphene formation is ascribed to two-dimensional layered feature of carbon nitride,and high compatibility of carbon nitride/glucose systems.Structural measurements suggest that the graphene possesses rich edge and topological defects.The graphene catalyst exhibits higher power density than commercial Pt/C catalyst in a primary Zn-air battery.Combining experimental results and theoretical thermodynamic analysis,it is identified that graphitic nitrogen-modified topological defects at carbon framework edges are responsible for the decent ORR performance.The strategy presented in this work can be can be scaled up readily to fabricate defective carbon materials.

关键词： Carbon materials Electrocatalysis Oxygen reduction reaction Solid-phase synthesis Zn-air battery

light People:Prof.Eric Mazur speaks about ultrafast optics and education

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light(Science & Applications) 2024年第3期13卷 402-406页

作者： Chenzi Guo yang li Changchun Institute of Optics Fine Mechanics and PhysicsChinese Academy of SciencesChangchunChina State Key Laboratory of Precision Measurement Technology and Instrument Department of Precision InstrumentTsinghua UniversityBeijingChina

Prof.Eric Mazur is a great influencer over and beyond the optics community.As a physicist,he is a pioneer of ultrafast optics and was one of the inventors of colliding-pulse mode-locked laser.As an educator,he not only gave talks to thousands,but also revolutionized teaching with his globally renowned methodology“Peer Instruction”.As a leader and entrepreneur,he co-founded several companies and was President of Optica(formerly the Optical Society)and currently is the Chair of the Optica Foundation.Here,light:Science&Applications talked with Prof.Eric Mazur about his opinions on research,education and industry.The full interview video can be found in the Supplementary File.

关键词： optics education companies

Polymeric microneedle-mediated sustained release systems: Design strategies and promising applications for drug delivery

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Asian Journal of Pharmaceutical Sciences 2022年第1期17卷 70-86页

作者： Li Yang Yao yang Hongzhong Chen lin Mei Xiaowei Zeng Institute of Pharmaceutics School of Pharmaceutical Sciences(Shenzhen)Sun Yat-sen UniversityShenzhen 518107China Tianjin Key Laboratory of Biomedical Materials Key Laboratory of Biomaterials and Nanotechnology for Cancer ImmunotherapyInstitute of Biomedical EngineeringChinese Academy of Medical Sciences&Peking Union Medical CollegeTianjin 300192China

Parenteral sustained release drug formulations, acting as preferable platforms for longterm exposure therapy, have been wildly used in clinical practice. However, most of these delivery systems must be given by hypodermic injection. Therefore, issues including needle-phobic, needle-stick injuries and inappropriate reuse of needles would hamper the further applications of these delivery platforms. Microneedles (MNs) as a potential alternative system for hypodermic needles can benefit from minimally invasive and self-administration. Recently, polymeric microneedle-mediated sustained release systems (MN@SRS) have opened up a new way for treatment of many diseases. Here, we reviewed the recent researches in MN@SRS for transdermal delivery, and summed up its typical design strategies and applications in various diseases therapy, particularly focusing on the applications in contraception, infection, cancer, diabetes, and subcutaneous disease. An overview of the present clinical translation difficulties and future outlook of MN@SRS was also provided.

关键词： Transdermal drug delivery Microneedles Sustained release Long-term exposure therapy

Quantum key recovery attack on SIMON32/64

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Cybersecurity 2021年第1期4卷 349-363页

作者： Hui liu Li Yang State Key Laboratory of Information Security Institute of Information EngineeringChinese Academy of Sciences100093 BeijingChina School of Cyber Security University of Chinese Academy of Sciences100049 BeijingChina

The quantum security of lightweight block ciphers is receiving more and more attention.However,the existing quantum attacks on lightweight block ciphers only focused on the quantum exhaustive search,while the quantum attacks combined with classical cryptanalysis methods haven’t been well studied.In this paper,we study quantum key recovery attack on SIMON32/64 using Quantum Amplitude Amplification algorithm in Q1 model.At first,we reanalyze the quantum circuit complexity of quantum exhaustive search on SIMON32/64.We estimate the Clifford gates count more accurately and reduce the T gate count.Also,the T-depth and full depth is reduced due to our minor modifications.Then,using four differentials given by Biryukov in FSE 2014 as our distinguisher,we give our quantum key recovery attack on 19-round SIMON32/64.We treat the two phases of key recovery attack as two QAA instances separately,and the first QAA instance consists of four sub-QAA instances.Then,we design the quantum circuit of these two QAA instances and estimate their corresponding quantum circuit complexity.We conclude that the quantum circuit of our quantum key recovery attack is lower than quantum exhaustive search.Our work firstly studies the quantum dedicated attack on SIMON32/64.And this is the first work to study the complexity of quantum dedicated attacks from the perspective of quantum circuit complexity,which is a more fine-grained analysis of quantum dedicated attacks’complexity.

关键词： Quantum cryptanalysis lightweight block ciphers Quantum amplitude amplification Differential cryptanalysis Key recovery attack SIMON32/64