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Tailor-made high elasticity and low-hysteresis hydrogels based on asymmetric H-bonding crosslinking for wearable applications

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Science China Chemistry 2025年

作者： Xiaofang Shi Nan Shi Miaomiao dang Chengyu Ji Yingjie li Peiyi Wu Zhiguo Hu Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals Henan Engineering Laboratory of Chemical Pharmaceutical and Biomedical Materials School of Chemistry and Chemical Engineering Henan Normal University State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Chemistry Chemical Engineering and Biotechnology & Center for Advanced Low-dimension Materials Donghua University

The conventional method of fabricating hydrogels constantly confronts the conflict between elasticity and toughness, limiting their repetitive application. Achieving the desired elasticity through a simple and low-cost approach is a significant challenge for hydrogels, particularly through rational molecular design. Here, low-hysteresis and high-toughness hydrogels are developed from the design of a new feature monomer, N-acryloylethylsemicarbazide (NACE). Based on a concept of “asymmetric Hbonding design”, the unique double and triple H-bonding of NACE can result in a novel asymmetric crosslinking polymer with alternating strong and weak H-bonding regions. The NACE is copolymerized with acrylamide (AM) to regulate the mechanical properties of hydrogel via H-bonding density. The P(NACE-AM) ionic hydrogels are obtained simply and rapidly via one-step photopolymerization without a chemical cross-linking agent. The P(NACE-AM) hydrogels combine superb mechanical elasticity and toughness, and excellent ionic conductivity, showing great potential as durable ionic conductive devices for wearable utilization.

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统筹发展和安全中的“民参军”——二战后大国技术发展模式及其启示

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国际安全研究 2025年第1期43卷 4-29,155页

作者：黄琪轩李文见上海交通大学国际与公共事务学院上海200030 上海市创新政策评估研究中心上海交通大学政治经济研究院

促进发展和维护安全是世界各国追求的两项重要目标,而技术的军民融合则是连接发展和安全的重要纽带。二战后,苏联、日本与美国的军民融合实践,分别代表了“旋转耗散”“旋转上升”“旋转下降”以及“旋转环绕”四种大国技术发展模式。... 详细信息

促进发展和维护安全是世界各国追求的两项重要目标,而技术的军民融合则是连接发展和安全的重要纽带。二战后,苏联、日本与美国的军民融合实践,分别代表了“旋转耗散”“旋转上升”“旋转下降”以及“旋转环绕”四种大国技术发展模式。这四种模式的不同成效表明,要成功地实现军民技术融合,统筹发展和安全,关键在于“民参军”。“民参军”为军用技术提供了负反馈的制约、互补能力的积累以及持续的资金来源。苏联的困境在于缺乏“民参军”,大量军用技术难以外溢到民用部门,最终导致军用部门也缺乏持续的资金支持。日本的经验是技术从民用部门扩散到军用部门,民用部门推动了军民两用技术的发展。20世纪80年代前的美国,服务安全的军用技术逐步外溢到服务发展的民用部门;在此之后,军用技术与民用技术相互渗透,交叉影响。二战后大国技术的发展模式及军民技术融合的成败为中国推动军民融合、统筹发展和安全提供了重要借鉴。

关键词：统筹发展和安全技术发展模式军民融合民参军

Relationship between cellular radio-sensitivity and naked DNA damage in mammalian cells exposed to heavy ions

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Nuclear Science and Techniques 2009年第6期20卷 349-353页

作者： li wenjian ZHOU Guangming WANG Zhuanzi li Qiang dang Bingrong WANG Jufang Institute of Modern Physics Chinese Academy of Sciences Lanzhou 730000 China

The relationship between deoxyribonucleic acid (DNA) damage and the cell death induced by 12C ions irradiation was examined in four kinds of cells, Melanoma B16, cervical squamous carcinoma HeLa, Chinese hamster V79 and hepatoma SMMC-7721. Cell survival was determined by a colonogenic assay, and the sensitivity was described by D50 (the dose of radiation necessary to reduce the survival to 50%). For all cell lines, D50 ranged from 0.74 Gy to 3.85 Gy, among them B16 was the most radiosensitive to 12C ions, and V79 and HeLa cells had almost the same radio-sensitivity, SMMC-7721 was the last. The induction of deproteinized DNA double-strand breaks induced by 12C ions were measured by pulsed-field gel electrophoresis (PFGE), and the initial yield of the deproteinized DNA dsbs per unit dose was expressed as the DNA double break level (L). A linear dose-response curve was seen for initial DNA dsbs for all cell lines (slopes range from 0.40-0.98 (DSBs/100Mbp/Gy)). V79 was the steepest, B16 was the last. There was an inverse relationship between the initial DNA dsb and D50 if the B16 cell line was not considered, but there was no relativity even excludes the B16 cell line. The present results indicate that there is no relationship between cellular sensitivity and initial DNA dsb, even exclude the effects of chromatin structure.

关键词：哺乳动物细胞 DNA损伤放射敏感性重离子 DNA双链断裂脉冲场凝胶电泳无线蜂窝

Geochemistry and Petrogenesis of the ca. 2.5Ga High-K Granitoids in the Southern North China Craton

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Journal of Earth Science 2019年第3期30卷 647-665页

作者： Lei li wenjian Zhai State Key Laboratory of Geological Processes and Mineral Resources School of Earth Sciences China University of Geosciences Wuhan 430074 China No.1 Geology and Mineral Resources Survey Institute of Henan Geology and Mineral Exploration and Development Bureau Luoyang 471023 China Henan Institute of Geological Survey Zhengzhou 450001 China

Archean high-K granitoids, generally formed after tonalite-trondhjemite-granodiorite (TTGs), are important for understanding crustal reworking of ancient cratons. The linshan Archean high-K granitoids from the southern Trans-North China Orogen (TNCO) provide a window into the conti-nental crustal evolution of the North China Craton (NCC). They mainly consist of monzogranite and granodiorite which were formed during 2 542-2 503 Ma. The high-K granitoids have high SiO2 (65.86wt.%-78.08wt.%), K2O (3.29 wt.%-7.62wt.%) and low P2O5 (0.01 wt.%-0.27wt.%). They display right inclined REE patterns with negative Eu anomalies (Eu/Eu*=0.20-0.81).Their spider diagram is characterized by enrichment of Rb, K, Th, U and depletion of Nb, Ta, Zr, Ti. The rocks have positive and variable zircon εHf(t)(+2.5 to +6.6) and whole-rock εHf(t)(+0.7 to +4.5) with two-stage model ages (TDM2^Hf=2.87-2.64 Ga;TDM2^Nd=2.77-2.50 Ga) similar to those of the Archean TTG-ty pe rocks, amphibolites and diorites in the area. These evidences suggest that the high-K granitoids were produced by partial melting of juvenile crustal rocks. The linshan high-K granitoids show relatively high whole-rock zircon saturation tempera-tures (694-889℃) and low Sr/Y ratios (0.27-21.1), indicating low pressure partial melting. Combined with other geological evidences, the linshan high-K granitoids are suggested to have been produced by partial melting of the continental crust in a post-collision extensional environment after an arc-continent collision. Thus, the NCC did not amalgamate together until ca. 2.5 Ga. Compiled zircon U-Pb ages and Hf isotopes reveal that the ca. 2.5 Ga magmatism represents reworking of the continental crust.

关键词： granitoids petrogenesis Neoarchean North China Craton

Effects of future land use change on the regional climate in China

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Science China Earth Sciences 2015年第10期58卷 1840-1848页

作者： HUA wenjian CHEN HaiShan li Xing Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters/Key Laboratory of Meteorological Disaster Ministry of Education Nanjing University of Information Science & Technology State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric PhysicsChinese Academy of Sciences International Joint Laboratory on Climate and Environment Change Nanjing University of Information Science & Technology

Land use and land cover change(LUCC)is one of the important human forcing on ***,it is difficult to infer how LUCC will affect climate in the future from the effects of previous LUCC on regional climates in the ***,based on the land cover data recommended by the Coupled Model Intercomparison Project Phase 5(CMIP5),a regional climate model(Reg CM4)was used to investigate the climate effects of future land use change over *** 15-year simulations(2036–2050),one with the current land use data and the other with future land cover scenario(2050)were *** is noted that future LUCC in China is mainly characterized by the transition from the grassland to the *** suggest that the magnitudes and ranges of the changes in temperature and precipitation caused by future LUCC show evident seasonality,which are more prominent in summer and *** response of climate to future LUCC mainly happens in Northeast China,North China,the Hetao Area,Eastern Qinghai-Tibetan Plateau and South *** investigation shows that future LUCC can also produce significant impacts on the atmospheric *** results in abnormal southwesterly wind over extensive areas from the Indian peninsula to the coasts of the South China Sea and South China through the Bay of ***,Indian tropical southwest monsoons and South Sea southwest monsoons will both be strong,and the abnormal water vapor convergence from the South China Sea and the Indian Ocean will result in more precipitation in South China.

关键词： land use change regional climate numerical simulation

A Review on Thermal Management of li-ion Battery:from Small-Scale Battery Module to Large-Scale Electrochemical Energy Storage Power Station

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Journal of Thermal Science 2025年第1期 1-23页

作者： CHEN Zhifeng JIA li YIN liaofei dang Chao REN Honglei ZHANG Zhiqiang Beijing Key Laboratory of Flow and Heat Transfer of Phase Changing in Micro and Small Scale School of MechanicalElectronic and Control EngineeringBeijing Jiaotong University

li-ion battery is an essential component and energy storage unit for the evolution of electric vehicles and energy storage technology in the ***,in order to cope with the temperature sensitivity of li-ion battery and maintain li-ion battery safe operation,it is of great necessary to adopt an appropriate battery thermal management system(BTMS).In this paper,the current main BTM strategies and research hotspots were discussed from two aspects:small-scale battery module and large-scale electrochemical energy storage power station(EESPS).The practical application situation,advantages and disadvantages,and the future development trend of each heat dissipation method(air,liquid,PCM,heat pipe,hybrid cooling) were described in *** them,the air cooling and liquid cooling were reviewed in-depth based on the engineering *** PCM,heat pipe and hybrid cooling were reviewed extensively based on the latest *** research provides a comprehensive understanding for the BTMS in all scales.

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DQN-based decentralized multi-agent JSAP resource allocation for UAV swarm communication

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Journal of Systems Engineering and Electronics 2023年第2期34卷 289-298页

作者： li Jie dang Xiaoyu li Sai College of Electronic and Information Engineering Nanjing University of Aeronautics and AstronauticsNanjing 211106China

It is essential to maximize capacity while satisfying the transmission time delay of unmanned aerial vehicle(UAV)swarm communication *** order to address this challenge,a dynamic decentralized optimization mechanism is presented for the realization of joint spectrum and power(JSAP)resource allocation based on deep Q-learning networks(DQNs).Each UAV to UAV(U2U)link is regarded as an agent that is capable of identifying the optimal spectrum and power to communicate with one *** convolutional neural network,target network,and experience replay are adopted while *** findings of the simulation indicate that the proposed method has the potential to improve both communication capacity and probability of successful data transmission when compared with random centralized assignment and multichannel access methods.

关键词： joint spectrum and power(JSAP) unmanned aerial vehicle(UAV)swarm communication deep Q-learning network(DQN) UAV to UAV(U2U)

Climate tipping-point potential and paradoxical production of methane in a changing ocean

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Science China Earth Sciences 2018年第12期61卷 1714-1727页

作者： Hongyue dang Jia li State Key Laboratory of Marine Environmental Science Institute of Marine Microbes and EcospheresCollege of Ocean and Earth SciencesXiamen UniversityXiamen 361102China Tianjin Branch of China National Offshore Oil Corporation Ltd Tianjin 300452China

The global warming potential of methane(CH_4) is about 30 times stronger than that of carbon dioxide(CO2) over a century timescale. Methane emission is hypothesized to have contributed to global climate change events and mass extinctions during Earth's history. Therefore, the study of CH_4 production processes is critically important to the understanding of global climate change. It has been a dogma that biogenic CH_4 detectable in the oceans originates exclusively from the anaerobic metabolic activity of methanogenic archaea in hypoxic and anoxic environments, despite reports that many oxic surface and near-surface waters of the world's oceans are CH_4-supersaturated, thereby rendering net sea-to-air emissions of CH_4. The phenomenon of CH_4 production in oxic marine waters is referred to as the "ocean methane paradox". Although still not totally resolved, recent studies have generated several hypotheses regarding the sources of CH_4 production in oxic seawater. This review will summarize our current understanding of the importance of CH_4 in the global climate and analyze the biological processes and their underpinning mechanisms that lead to the production of CH_4 in oxic seawater environments. We will also tentatively explore the relationships of these microbial metabolic processes with global changes in climate and environment.

关键词： Ocean methane paradox Gas hydrate Marine particles Methylphosphonate DSMP Global warming Ocean deoxygenation Ocean acidification

The suitability assessment on site selection for bottom seeding scallop culture based on analytic hierarchy process

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Journal of Oceanology and limnology 2024年第2期42卷 647-663页

作者： Ziniu ZHANG Zhenyan WANG Guihua li Meihan ZHAO wenjian li School of Earth Sciences and Engineering Shandong University of Science and TechnologyQingdao 266590China Key Laboratory of Marine Geology and Environment Institute of OceanologyChinese Academy of SciencesQingdao 266071China Laboratory for Marine Mineral Resources National Laboratory for Marine Science and TechnologyQingdao 266237China University of Chinese Academy of Sciences Beijing 100049China

Scallop culture is an important way of bottom-seeding marine ranching,which is of great significance to improve the current situation of fishery ***,there are some problems in site-selection evaluation of marine ranching,such as imperfect criteria system,complex structure,untargeted criteria quantification,*** addition,no site-selection evaluation method of bottom-seeding culture areas for scallops is ***,we established a hierarchy structure model according to the analytic hierarchy process(AHP)theory,in which social,physical,chemical,and biological environments are used as main criteria,and marine functional zonation,water depth,current,water temperature,salinity,substrate type,water quality,sediment quality,red tide,phytoplankton,and zooplankton are used as sub-criteria,on which a multi-parameter evaluation system is set ***,the dualism method,assignment method,and membership function method were used to quantify sub-criteria,and a quantitative evaluation for the entire criteria was added,including the evaluation and analysis of two types of unsuitable environmental *** overall consideration in scallop yield,quality,and marine ranching construction objectives,the weight of the main criteria could be *** grades in the suitability corresponding to the evaluation result were divided,and the Python language was used to create an evaluation system for efficient calculation and intuitive presentation of the evaluation *** marine cases were simulated based on existing survey data,and the results prove that the method is feasible for evaluating and analyzing the site selection of bottom-seeding culture areas for scallops under various environmental *** proposed evaluation method can be promoted for the site selection of bottom-seeding marine *** study provided theoretical and methodological references for the site selection evaluation of other types of marine ranching.

关键词： marine ranching bottom-seeding scallops site selection evaluation analytic hierarchy process evaluation system