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Light-fueled dissipative self-assembly at molecular and macro-scale enabled by a visible-light-responsive transient hetero-complementary quadruple hydrogen bond

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Chinese Chemical Letters 2023年第3期34卷 308-312页

作者： Shi-Tao han Hong-Ying Duan Tian-guang Zhan Xiao-Bo hu Li-Chun Kong Kang-Da Zhang Key Laboratory of the Ministry of Education for Advanced Catalysis Materials College of Chemistry and Life ScienceZhejiang Normal UniversityJinhua 321004China Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province School of ScienceWestlake UniversityHangzhou 310024China

The development of out-of-equilibrium self-assembly systems using light as input fuel is highly desirable and promising for the fabrication of smart supramolecular materials. Herein, we report the construction of new artificial light-fueled dissipative molecular and macroscopic self-assembly systems based on a visible-light-responsive transient quadruple H-bonding array, which consists of an azobenzene-modified ureidopyrimidinone(UPy) module(Azo-O-UPy) and a nonphotoactive diamidonaphthyridine(DAN) derived competitive binder(Napy-1). The visible light(410 nm) irradiation can induce the E to Z isomerization of the azobenzene unit of E-Azo-O-UPy to produce Z-Azo-O-UPy with an opened UPy binding site, which can complex with Napy-1 to form a quadruply H-bonded heterodimer. The heterodimer is metastable and can be quickly disassembled in dark, owing to the fast thermal relaxation of Z-Azo-O-UPy to E-Azo-O-UPy. While introducing such transient quadruple H-bonding interaction into a linear polymer system or a polymeric gel system, light-fueled out-of-equilibrium polymeric assembly both at molecular and macro-scale can be achieved.

关键词： Dissipative self-assembly Macroscopic self-assembly Photo-responsiveness Quadruple hydrogen bonds Supramolecular chemistry

Current status and challenges of pig-to-human organ xenotransplantation

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Science China(Life Sciences) 2024年第4期67卷 829-831页

作者： Minghui Fang Yong-guang Yang Zheng hu Key Laboratory of Organ Regeneration&Transplantation of Ministry of Education and National-Local Joint Engineering Laboratory of Animal Models for Human DiseasesThe First Hospital of Jilin UniversityChangchun 130061China

Organ shortage is a global *** collected by the Global Observatory on Donation and Transplantation reveals that over 150,000 solid organ transplants are conducted globally each year,a 52%increase from 2010(http://***/... 详细信息

关键词： globally global shortage

A trinomial type of σ-LFSR oriented toward software implementation

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Science in China(Series F) 2007年第3期50卷 359-372页

作者： ZENG guang HE KaiCheng han WenBao Department of Applied Mathematics Information Engineering University Zhengzhou 450002 China

In this paper, we introduce a new type of feedback shift register based on words, called G-linear feedback shift register （σ-LFSR） which can make full use of the instructions of modern CPUs so that we can find good σ-LFSR with simple structure and fast software implementation. After analysis, we find a class of simple σ-LFSR with maximal period and give an algorithm of searching for those σ-LFSRs. As a result, we provide a new optional fast component in the design of modern wordbased stream ciphers.

关键词： finite field stream cipher σ-LFSR primitive polynomial fast software implementation

Comparison of Metal Dusting Behavior of Several Alloys

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Journal of Iron and Steel Research International 2004年第3期11卷 48-52页

作者： han guang-wei DENG Bo FENG Di Central Iron and Steel Research Institute

A comprehensive study on the mechanical behavior of foamed metals was demonstrated. The relationship among their mechanical properties,preparation method,porosity and the structure was briefly studied as well.

关键词： foamed metal porous material porous metal cellular solid

Recycling strategies for vitrimers

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International Journal of Smart and Nano Materials 2022年第3期13卷 367-390页

作者： Haochuan Zhang Jingjing Cui guang hu Biao Zhang Frontiers Science Center for Flexible Electronics(FSCFE) Ningbo Institute of Northwestern Polytechnical UniversityNorthwestern Polytechnical UniversityXi’anShaanxiChina Queen Mary University of London Engineering School Northwestern Polytechnical University(NPU)Xi’anP.R.China

Vitrimer is a new type of material that combine the advantages of thermoplastic and thermoset *** rapid dynamic exchange reactions at high temperature allow the topology of cross-linked networks to change and rearrange while keeping material structures and properties *** concept of vitrimer has emerged to provide a viable strategy for the recycling of highperformance polymer materials,and lots of research works have been carried out for the development of various types of *** addition,the recycling strategies for vitrimers are particularly important to determine the performance and potential applications of the recovered ***,it is an innovative and valu-able perspective to discuss vitrimer materials according to their different recycling *** this review,we start with a brief overview of vitrimers,and then,focus on recycling strategies for ***,we highlight the advantages and disadvan-tages of the two different recycling strategies:physical and chemi-cal recycling methods,and then explore the feasibility of upcycling vitrimers using 3D printing ***,the impact of recy-cling strategies on vitrimer materials and the prospects for max-imizing the use of vitrimer materials are discussed.

关键词： Vitrimers chemical recycling physical recycling 3D printing

Subluminal and Superluminal Phenomena in a Four-Level Atom

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Communications in Theoretical Physics 2008年第7期50卷 197-200页

作者： han Ding-An ZENG Ya-guang CAO hui Physics Department Foshan University Foshan 528000 China

In a four-level atomic system, we investigate the light pulse propagation properties interacting with only one laser field. It is shown that in the steady state, the group velocity of the light pulse can be changed from subluminal to superluminal by varying the field detuning. Meanwhile, the effects of the field intensity on the group velocity are also shown. At last, with special parameters, the analytical solution for the group index is also obtained.

关键词： superluminal subluminal

Model of Airflow Field on the Deck for Shipborne Helicopter Flight Dynamics Analysis

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Transactions of Nanjing University of Aeronautics and Astronautics 2017年第5期34卷 567-577页

作者： hu Guocai Xu guang Wang Yunliang Liu Shuyan Department of Airborne Vehicle Engineering Naval Aeronautical and Astronautical University Yantai 264001 P.R. China Troops 92074 PLA Ningbo 315000 P. R. China

For the research of helicopter/ship dynamic interface,the method of combining steady flow and stochastic flow is adopted to establish a flow field model applied to the flight dynamics analysis of shipborne *** steady flow is calculated by computational fluid dynamics(CFD)method,while the stochastic flow is composed of the compensation velocity derived from ship motion and turbulence above the *** accuracy of the proposed flow field model is verified by comparing the helicopter response in the proposed flow field with the results calculated by US Army′s Military Specifications(MIL)model which is commonly used in ***,it also shows the proposed flow field model is more appliable to flight dynamics analysis of shipborne *** that the basis,ship deck flow field is simulated at different sea conditions by adjusting the wind speed on the deck,mother ship movement and shipboard turbulence,*** helicopter angular rate response is *** results show that the difference of dynamic stability between helicopter′s roll and pitch leads to the facts that the influence of above factors on the helicopter′s roll angular rate response is greater than that of pitch angular rate,that the frequency and amplitude of mother ship roll motion are much greater than those of pitch motion,and that the disturbance caused by roll motion on the air has greater influence on the helicopter *** shipboard turbulence is the main disturbance factor that influences helicopter flight stability and its intensity determines the amplitudes of angular rate response.

关键词： shipborne helicopter flight dynamics airflow field on the deck time-space characteristics sea condition

Pairing-Free ID-Based Key-Insulated Signature Scheme

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Journal of Electronic Science and Technology 2015年第1期13卷 33-38页

作者： Guo-Bin Zhu hu Xiong Zhi-guang Qin School of Computer Science and Engineering University of Electronic Science and Technology of China

Without the assumption that the private keys are kept secure perfectly, cryptographic primitives cannot be deployed in the insecure environments where the key leakage is inevitable. In order to reduce the damage caused by the key exposure in the identity-based（ID-based） signature scenarios efficiently, we propose an ID-based key-insulated signature scheme in this paper, which eliminates the expensive bilinear pairing operations. Compared with the previous work, our scheme minimizes the computation cost without any extra cost. Under the discrete logarithm（DL） assumption, a security proof of our scheme in the random oracle model has also been given.

关键词： Identity-based cryptography key-insulated random oracle mode signature

Influence of Aging Treatment on Precipitation Behavior of η Phase in Ni-Co-Cr Alloy

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Journal of Iron and Steel Research International 2010年第1期17卷 64-69,78页

作者： WAN Wen-juan han guang-wei DENG Bo Department of High Temperature Materials Research Central Iron and Steel Research Institute Beijing 100081 China

The influence of aging treatment on precipitation behavior of η phase in a new Ni-Co-Cr fastener superalloy, AEREX350, was investigated by means of optical microscopy, scanning electron microscopy （SEM） and transmission electron microscopy （TEM）. The precipitation behavior of η phase with two kinds of morphologies in this material was found to be sensitive to the temperature and time of aging treatment. Time-temperature-transformation curves of these two η phase were achieved. Furthermore, diffraction patterns revealed the semi-coherent orientation relationship between η phase and γ matrix. This approach may be used to optimize the microstructure of the alloy for excellent mechanical properties.

关键词： precipitation η phase aging