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Graphene Aerogel Composites with Self‑Organized Nanowires‑Packed Honeycomb Structure for Highly Efficient Electromagnetic Wave Absorption

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Nano-Micro Letters 2025年第2期17卷 533-547页

作者： Xiao You Huiying Ouyang Ruixiang Deng Qiuqi Zhang Zhenzhong Xing Xiaowu Chen Qingliang Shan Jinshan Yang Shaoming Dong State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050People’s Republic of China Key Laboratory of Inorganic Coating Materials CAS Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050People’s Republic of China Structural Ceramics and Composites Engineering Research Center Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050People’s Republic of China Center of Materials science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049People’s Republic of China School of Physical science and Technology ShanghaiTech UniversityShanghai 201210People’s Republic of China School of Materials science and Engineering Zhejiang Sci-Tech UniversityHangzhou 310018People’s Republic of China University of Chinese Academy of sciences Beijing 100039People’s Republic of China

With vigorous developments in nanotechnology,the elaborate regulation of microstructure shows attractive potential in the design of electromagnetic wave ***,a hierarchical porous structure and composite heterogeneous interface are constructed successfully to optimize the electromagnetic loss *** macro–micro-synergistic graphene aerogel formed by the ice template‑assisted 3D printing strategy is cut by silicon carbide nanowires(SiC_(nws))grown in situ,while boron nitride(BN)interfacial structure is introduced on graphene *** unique composite structure forces multiple scattering of incident EMWs,ensuring the combined effects of interfacial polarization,conduction networks,and magnetic-dielectric ***,the as-prepared composites present a minimum reflection loss value of−37.8 dB and a wide effective absorption bandwidth(EAB)of 9.2 GHz(from 8.8 to 18.0 GHz)at 2.5 ***,relying on the intrinsic high-temperature resistance of SiC_(nws) and BN,the EAB also remains above 5.0 GHz after annealing in air environment at 600℃ for 10 h.

关键词： Hierarchical porous structure Interface High-temperature resistance Graphene aerogel composites Electromagnetic wave absorption

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Bidirectional regulation of the brain-gut-microbiota axis following traumatic brain injury

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Neural Regeneration Research 2025年第8期20卷 2153-2168页

作者： Xinyu You Lin Niu Jiafeng Fu Shining Ge Jiangwei Shi Yanjun Zhang Pengwei Zhuang national Key Laboratory of Chinese Medicine Modernization Tianjin University of Traditional Chinese MedicineTianjinChina Haihe Laboratory of Modern Chinese Medicine Tianjin University of Traditional Chinese MedicineTianjinChina First Teaching Hospital of Tianjin University of Traditional Chinese Medicine TianjinChina national Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion TianjinChina

Traumatic brain injury is a prevalent disorder of the central nervous *** addition to primary brain parenchymal damage,the enduring biological consequences of traumatic brain injury pose long-term risks for patients with traumatic brain injury;however,the underlying pathogenesis remains unclear,and effective intervention methods are *** dysfunction is a significant consequence of traumatic brain *** the most densely innervated peripheral tissue in the body,the gut possesses multiple pathways for the establishment of a bidirectional“brain-gut axis”with the central nervous *** gut harbors a vast microbial community,and alterations of the gut niche contribute to the progression of traumatic brain injury and its unfavorable prognosis through neuronal,hormonal,and immune pathways.A comprehensive understanding of microbiota-mediated peripheral neuroimmunomodulation mechanisms is needed to enhance treatment strategies for traumatic brain injury and its associated *** comprehensively reviewed alterations in the gut microecological environment following traumatic brain injury,with a specific focus on the complex biological processes of peripheral nerves,immunity,and microbes triggered by traumatic brain injury,encompassing autonomic dysfunction,neuroendocrine disturbances,peripheral immunosuppression,increased intestinal barrier permeability,compromised responses of sensory nerves to microorganisms,and potential effector nuclei in the central nervous system influenced by gut ***,we reviewed the mechanisms underlying secondary biological injury and the dynamic pathological responses that occur following injury to enhance our current understanding of how peripheral pathways impact the outcome of patients with traumatic brain *** review aimed to propose a conceptual model for future risk assessment of central nervous system-related diseases while elucidating novel insights into the bidirectional effec

关键词： traumatic brain injury brain-gut-microbiome axis gut microbiota neuroimmune immunosuppression host defense vagal afferents bacterial infection dorsal root ganglia nociception neural circuitry

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Mesoporous β-Co（OH）2 nanowafers and nanohexagonals obtained synchronously in one solution and their electrochemical hydrogen storage properties

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Progress in natural science:Materials International 2016年第6期26卷 555-561页

作者： Longqiang Wang Jingyuan Fu Yue Zhang Xiaoling Liu Yansheng Yin Lihua Dong Shougang Chen Institute of Materials science and Engineering Ocean University of China College of Marine science & Engineering Shanghai Maritime University

A water/oil two-phase solution strategy has been developed for the synthesis of various β-Co（OH）2nanostructures. More importantly, two different morphologies of β-Co（OH）2:mesoporous nanowafers and nanohexagons were successfully obtained through one reaction. Furthermore, the special mesoporous of β-Co（OH）2nanowafers and nanohexagons exhibited excellent electrochemical hydrogen storage capacities and cycling stability. The maximum capacity reached 265.9 and 215.7 mA hg-1at room temperature, *** 70 cycles, the discharging capacities of the electrode still remain above 218.2 and 175.4 mA hg-1, which indicates that the as-prepared mesoporous β-Co（OH）2nanowafers have a strong resistance against oxidation and corrosion. These results indicates that the mesoporous β-Co（OH）2nanowafers and nanohexagons may be potentially applied for electrochemical hydrogen storage.

关键词： β-Co(OH)2 Nanowafers Nanohexagonals Electrochemical hydrogen storage

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Fabrication of the ZnO/NiO p–n junction foam for the enhanced sensing performance

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Chinese Chemical Letters 2017年第3期28卷 670-674页

作者： Jing-Jing Liang Ming-Gang Zhao Long-Jiang Ding Si-Si Fan Shou-Gang Chen Department of Materials science and Engineering Ocean University of China Qingdao 266100 China

P-Type NiO foam with rough nanostructured surface was prepared by the surface treatment of Ni foam,and then it was decorated with n-type ZnO nanopyramids to construct a 3D p–n junction foam. The p–n junction foam was used for electrochemical detection of dopamine and the sensing performance was improved significantly compared with the single NiO and ZnO. High sensitivity（171 mμA/mmol/L）, fast response（2 s）, excellent selectivity and stability were achieved. It was attributed to the introduction of numerous p–n junction interfaces, the interfacial potential barrier played as a tuning factor for the electrochemical determination of dopamine. The results demonstrated it would be an important way to improve the biosensing performance by introducing the p–n junction interfaces.

关键词： ZnO/NiO p–n junction 3D architecture Electrochemical detection Dopamine

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Learning real-time search on c-space GVDs

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Frontiers of Computer science 2017年第6期11卷 1036-1049页

作者： Quanjun YIN Long QIN Yong PENG Wei DUAN College of Information System and Management National University of Defense Technology Changsha 410073 China

In the context of robotics, configuration space （c- space） is widely used for non-circular robots to engage tasks such as path planning, collision check, and motion planning. In many real-time applications, it is important for a robot to give a quick response to the user＇s command. Therefore, a constant bound on planning time per action is severely im- posed. However, existing search algorithms used in c-space gain first move lags which vary with the size of the under- lying problem. Furthermore, applying real-time search algo- rithms on c-space maps often causes the robots being trapped within local minima. In order to solve the above mentioned problems, we extend the learning real-time search （LRTS） algorithm to search on a set of c-space generalized Voronoi diagrams （c-space GVDs）, helping the robots to incremen- tally plan a path, to efficiently avoid local minima, and to ex- ecute fast movement. In our work, an incremental algorithm is firstly proposed to build and represent the c-space maps in Boolean vectors. Then, the method of detecting grid-based GVDs from the c-space maps is further discussed. Based on the c-space GVDs, details of the LRTS and its implemen- tation considerations are studied. The resulting experiments and analysis show that, using LRTS to search on the c-space GVDs can 1） gain smaller and constant first move lags which is independent of the problem size; 2） gain maximal clear- ance from obstacles so that collision checks are much re- duced; 3） avoid local minima and thus prevent the robot from visually unrealistic scratching.

关键词： generalized Voronoi diagrams real-time search,robotics configuration space incremental algorithms

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CRYSTALLIZATION AND MELTING OF NYLON 610

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Chinese Journal of Polymer science 1998年第3期16卷 241-252页

作者：王国明颜德岳卜海山 Department of Applied Chemistry Shanghai Jiaotong University Shanghai 200030 China Department of Materials science Fudan University Shanghai 200433 China

Differential scanning calorimetry was used to study the crystallization and melting of nylon 610. For nylon 610 crystallized from the melt state (260 degrees C), the overall rate of bulk crystallization can be described by a simple Avrami equation with Avrami exponent n approximate to 2, independent of crystallization temperature. With the experimentally obtained T-m(0) (235 degrees C similar to 255 degrees C) of nylon 610, the fold surface free energy a, was determined to be 35 similar to 38 erg/cm(2). The effects of annealing temperature and time on the melting of quenched nylon 610 were also investigated. For nylon 610 quenched at room temperature there is only one DSC endotherm peak DSC scans on annealed samples exhibited an endotherm peak at approximately 10 degrees C above the annealing temperature. The size and position of the endothermic peak is strongly related to annealing temperature and time. An additional third melting was observed when quenched nylon 610 was annealed at high temperature for a sufficiently long residence time. The existence of the third melting peak suggests that more than one kind of distribution of lamella thickness may occur when quenched nylon 610 is annealed. The implications of these results in terms of crystal thickening mechanism were discussed.

关键词： nylon 610 differential scanning calorimetry crystallization kinetics anneal melt

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Intelligent Control of Grate-kiln-cooler Process of Iron Ore Pellets Using a Combination of Expert System Approach and Takagi-Sugeno Fuzzy Model

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Journal of Iron and Steel Research International 2016年第5期23卷 434-441页

作者： Gui-ming YANG Xiao-hui FAN Xu-ling CHEN Xiao-xian HUANG Zong-ping LI School of Minerals Processing and Bioengineering Central South University

Grate-kiln-cooler has become a major process of producing iron ore pellets in China. Due to the diversity of the raw materials used and the multi-device multi-variable characteristics,this process still encounters with control problem. An attempt was proposed to deal with this issue. The three-device-integrated feature of the process was firstly analyzed to obtain control strategy,and then an intelligent control system using a combination of expert system approach and Takagi-Sugeno（ T-S） fuzzy model was developed. Expert system approach was used to diagnose and remedy the abnormal conditions,while T-S fuzzy model was used to stabilize the thermal state. In the construction of T-S fuzzy rules,antecedents were identified by fuzzy c-mean clustering algorithm incorporated with subtractive clustering algorithm,and consequent parameters were identified by recursive least square algorithm. The control system was applied in a Chinese pelletizing plant and the application results demonstrated its effectiveness of stabilizing the thermal states within three devices.

关键词： intelligent control grate-kiln-cooler expert system fuzzy model iron ore pellet

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A Flow Stress Model for High Strength Steels with Low Carbon Bainite Structure

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Journal of Iron and Steel Research International 2016年第4期23卷 372-379页

作者： Bao-sheng XIE Qing-wu CAI Wei YU Shi-xin XU Ban WANG Collaborative Innovation Center of Steel Technology University of Science and Technology Beijing national Engineering Research Center of Advanced Rolling University of Science and Technology Beijing

Two kinds of steels （YP960 and YP690） with low carbon bainite structure were designed, and their flow stress and strain hardening exponents were studied. The results showed that, when Hollomon relation was applied to descrihe the flow stress, there were significanl errors between the experimental and calculated points in specimens tempered below 400 ℃, while a high precision was ohserved in samples tempered above 400℃. Whereas, the modijied Voce relation could effectively predici the flow stress as well as the strain hardening exponent at different tempe ring temperatures, which was verified by unbiased estimators such as maximum relative error （MRXE） and average ahsolute relative error （AARE）. Besides, the modified Voee relation was also applied to estimate the maximum uniform strain, and the correlation coefficients （R） between the experimental data and calculated maximum uniform strain were more than 0.91. The high correlation coefficients indicated that the modified Vote relation could effec lively predict the uniform deformation ability of high strength steels with low carbon bainite structure at different tempering temperatures.

关键词： tempering temperature flow stress low carbon bainite Voce type relation strain hardening exponent

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Singularity problem of control moment gyro cluster with vibration isolators

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Chinese Journal of Aeronautics 2016年第1期29卷 238-247页

作者： Cui Yinghui Zheng Gangtie School of Aerospace Tsinghua University

As powerful torque amplification actuators, control moment gyros （CMGs） are often used in the attitude control of many state-of-the-art high resolution satellites. However, the distur- bance generated by the CMGs can not only reduce the attitude stability of a satellite but also dete- riorate the performance of optic payloads. Currently, CMG vibration isolators are widely used to target this problem. The isolators can affect the singularity of the CMG system as they are placed between the CMGs and the satellite bus and provide additional freedoms to the CMG system due to their flexibility. The formulation of the output torque of a CMG is studied first considering the dynamic imbalance of its spin rotor and then the deformation angle as a result of the isolator＇s flex- ibility is calculated. With the additional freedoms, the influence of isolator on the singularity problem is studied and a new steering logic to escape from the singular states is proposed.

关键词： Satellite Singularity Steering logic Torque error Vibration isolation

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Effects of Processing Variables on Microstructure and Yield Ratio of High Strength Constructional Steels

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Journal of Iron and Steel Research International 2016年第8期23卷 815-821页

作者： Jian KANG Cheng-ning LI Xiao-lei LI Jin-hua ZHAO Guo YUAN Guo-dong WANG State Key Laboratory of Rolling and Automation Northeastern University Shenyang 110819 Liaoning China Shougang Qian'an Iron and Steel Co. Ltd. Qian'an 064404 Hebei China

The process of“controlled rolling＋relaxation＋ultra fast cooling（UFC）”for high strength constructional steel with low yield ratio was *** and corresponding relationship with low yield ratio were *** results showed that the constructional steels with multiphase microstructure of bainitic ferrite,martensite-austenite（M-A）and lath bainite were obtained through the creative *** grain size decreased with the decrease in finish rolling temperature,which enhanced the strength by the grain refinement *** proper relaxation treatment promoted the bainitic ferrite lath width and the formation of blocky M-A *** addition,both the tensile and yield strength increased with the decrease in finish rolling temperature and UFC final temperature,but the yield strength increased more significantly than tensile strength,which caused the increase in yield *** using the process of“controlled rolling＋relaxation＋ultra fast cooling”,the excellent comprehensive mechanical properties of 780 MPa grade constructional steels of 12-40 mm in thickness were achieved.

关键词： relaxation tensile martensite rolling steels refinement ferrite austenite creative finish

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