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Lithiated Nafion-garnet ceramic composite electrolyte membrane for solid-state lithium metal battery

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Journal of Energy Chemistry 2020年第7期29卷 237-247,I0008页

作者： jing gao Qinjun Shao Jian Chen Advanced Rechargeable Battery Laboratory Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina University of Chinese Academy of Sciences Beijing 100049China

Single-ion conducting solid polymer electrolytes are expected to play a vital role in the realization of solid-state Li metal *** this work,a lithiated Nafion(Li-Nafion)-garnet ceramic Li6.25La3 Zr2 Al0.25O12(LLZAO)composite solid electrolyte(CSE)membrane with 30μm thickness was prepared for the first *** employing X-ray photoelectron spectroscopy and transmission electron microscope,the interaction between LLZAO and Li-Nafion was *** is found that the LLZAO interacts with the Li-Nafion to form a space charge layer at the interface between LLZAO and *** space charge layer reduces the migration barrier of Li-ions and improves the ionic conductivity of the CSE *** CSE membrane containing 10 wt%LLZAO exhibits the highest ionic conductivity of2.26×10-4 S cm-1 at 30℃among the pristine Li-Nafion membrane,the membrane containing 5 wt%,20 wt%,and 30 wt%LLZAO,*** also exhibits a high Li-ion transference number of 0.92,and a broader electrochemical window of 0-+4.8 V ***+/Li than that of 0-+4.0 V ***+/Li for the pristine Li-Nafion *** is observed that the CSE membrane not only inhibits the growth of Li dendrites but also keeps excellent electrochemical stability with the Li *** from the above merits,the solid-state LiFePO4/Li cell fabricated with the CSE membrane was practically charged and discharged at 30℃.The cell exhibits an initial reversible discharge specific capacity of 160 mAh g-1 with 97%capacity retention after 100 cycles at 0.2 C,and maintains discharge specific capacity of 126 mAh g-1 after500 cycles at 1 *** CSE membrane prepared with Li-Nafion and LLZAO is proved to be a promising solid electrolyte for advanced solid-state Li metal batteries.

关键词： Single-ion conductor Composite solid electrolyte Lithiated Nafion Garnet ceramic Solid-state Li metal battery

Three-dimensional cooperative guidance law for multiple missiles with impact angle constraint

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Journal of Systems Engineering and Electronics 2020年第6期31卷 1286-1296页

作者： YANG Biao jing Wuxing gao Changsheng School of Astronautics Harbin Institute of TechnologyHarbin 150001China

This paper proposes a cooperative guidance law for attacking a ground target with the impact angle constraint based on the motion camouflage strategy in the line-of-sight(LOS)frame.A dynamic model with the impact angle constraint is established according to the relative motion between multiple missiles and the *** process of cooperative guidance law design is divided into two ***,based on the undirected graph theory,a new finite-time consensus protocol on the LOS direction is derived to guarantee relative distances reach *** the value of acceleration command is positive,which is beneficial for engineering ***,the acceleration command on the normal direction of the LOS is designed based on motion camouflage and finite-time convergence,which can ensure the missiles reach the target with the desired angle and satisfy the motion camouflage *** finitetime stability analysis is proved by the Lyapunov *** simulations for stationary and maneuver targets have demonstrated the effectiveness of the cooperative guidance law proposed.

关键词： cooperative guidance law motion camouflage impact angle constraint finite-time

Mass-spring model for elastic wave propagation in multilayered van der Waals metamaterials

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Applied Mathematics and Mechanics(English Edition) 2024年第7期45卷 1107-1118页

作者： Yabin jing Lifeng WANG Yuqiang gao State Key Laboratory of Mechanics and Control for Aerospace Structures Nanjing University of Aeronautics and AstronauticsNanjing210016China

Multilayered van der Waals(vdW)materials have attracted increasing interest because of the manipulability of their superior optical,electrical,thermal,and mechanical properties.A mass-spring model(MSM)for elastic wave propagation in multilayered vdW metamaterials is reported in this *** dynamics(MD)simulations are adopted to simulate the propagation of elastic waves in multilayered vdW *** results show that the graphene/MoS_(2)metamaterials have an elastic wave bandgap in the terahertz *** MSM for the multilayered vdW metamaterials is proposed,and the numerical simulation results show that this model can well describe the dispersion and transmission characteristics of the multilayered vdW *** MSM can predict elastic wave transmission characteristics in multilayered vdW metamaterials stacked with different two-dimensional(2D)*** results presented in this paper offer theoretical help for the vibration reduction of multilayered vdW semiconductors.

关键词： multilayered van der Waals(vd W)metamaterial molecular dynamics(MD) mass-spring model(MSM) dispersion relation transmission characteristic

Extinction and Positivity for a Doubly Nonlinear Degenerate Parabolic Equation

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Acta Mathematica Sinica,English Series 2007年第10期23卷 1751-1756页

作者： Hong Jun YUAN Song Zhe LIAN chun Ling CAO Wen Jie gao Xiao jing XU Institute of Mathmatics Jilin University Jilin 130012 P. R. China

The aims of this paper are to discuss the extinction and positivity for the solution of the initial boundary value problem and Cauchy problem of ut = div（[↓△u^m｜p-2↓△u^m）. It is proved that the weak solution wi... 详细信息

关键词： doubly degenerate equation evolution equation extinction positivity

Broadband low-frequency sound absorption of multifunctional composite metastructure

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Science China Technological Sciences 2025年

作者： Yilong YANG Shanshan LIU Yan LI Tong gao Yongdong PAN Yong LI Yabin JIN School of Aerospace Engineering and Applied Mechanics Tongji University Institute of Acoustics School of Physics Science and Engineering Tongji University Shanghai Institute of Aircraft Mechanics and Control State International Joint Research Center of Aerospace Design and Additive Manufacturing Northwestern Polytechnical University Shanghai Key Laboratory of Intelligent Sensing and Detection Technology School of Mechanical and Power Engineering East China University of Science and Technology

In this study, we fabricated multifunctional metastructures from carbon fiber-reinforced plastic composites using additive manufacturing technology. These metastructures are characterized by their lightweight, load-bearing capacity, and broadband low-frequency sound absorption properties. The metastructure consists of 36 unit cells, and non-local coupling mechanism was considered for designing the sound absorption performance. We developed an acoustic impedance theory tailored for the metastructure, facilitating an analysis of thermal and viscous dissipation mechanisms. It is proven theoretically and experimentally that the proposed composite metastructure can achieve a noise reduction with an average sound absorption coefficient greater than 0.9 across frequencies in the rage of 330–1500 Hz. We also studied the metastructure’s quasi-static and cyclic compression performance, confirming its efficient absorption capabilities after cyclic compression. The proposed design and additive manufacturing method for composite metastructures provides a novel pathway for creating lightweight, multifunctional structures with diverse applications, such as aerospace engineering.

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Sporamin suppresses growth of xenografted colorectal carcinoma in athymic BALB/c mice by inhibiting liver β-catenin and vascular endothelial growth factor expression

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World Journal of Gastroenterology 2019年第25期25卷 3196-3206页

作者： chun Yang jing-Jie Zhang Xiao-Peng Zhang Rong Xiao Peng-gao Li School of Public Health Capital Medical UniversityBeijing Key Laboratory of Clinical Epidemiology

BACKGROUND Colorectal cancer(CRC)is the third most common malignancy of the digestive tract and the fifth leading cause of cancer-related mortality in ***,a Kunitz-type trypsin inhibitor isolated from sweet potato,is a potential anti-cancer agent with activities against a number of malignant tumor cells in *** liver secretes a myriad of endocrine factors that may facilitate the growth and transformation of tumors in the development of *** To investigate the effects of sporamin on liver morphology and biomarkers of xenografted CRC in the liver of athymic BALB/c *** Twenty-seven male BALB/c nude mice were randomly divided into control,vehicle,and sporamin *** in the latter two groups were intraperitoneally xenografted with LoVo colorectal carcinoma cells and intragastrically infused with saline or sporamin(0.5 g/kg body weight/d),respectively,for 3 *** and eosin(HE)staining of the sections was performed to observe morphological changes in hepatic tissue and real-time fluorescent quantitative PCR(qPCR)and enzyme-linked immunosorbent assay(ELISA)were used to measure the expression ofβ-catenin and vascular endothelial growth factor(VEGF)in the *** Sporamin significantly reduced the number and weight of tumor nodules formed in the abdominal *** with the vehicle group,the mean tumor weight(±SD)in the sporamin group was significantly reduced(0.44±0.10 g vs 0.26±0.15 g)and the total number of tumors decreased from 93 to *** staining showed that enlargement of the nucleus and synthesis of proteins within hepatocytes,as well as infiltration of inflammatory cells into the liver,were attenuated by *** staining and ELISA showed that the concentrations ofβ-catenin and VEGF in the liver were significantly reduced by *** with the vehicle group,the expression ofβ-catenin measured in integrated optical density units per area was reduced in the sporamin group(47.29±9.10 vs 26

关键词： Sporamin Colorectal cancer Liver Vascular endothelial growth factor β-catenin

Potential role of diabetes mellitus in the progression of cirrhosis to hepatocellular carcinoma:a cross-sectional case-control study from Chinese patients with HBV infection

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Hepatobiliary & Pancreatic Diseases International 2013年第4期12卷 385-393页

作者： chun gao Long Fang Hong-Chuan Zhao jing-Tao Li Shu-Kun Yao Department of Gastroenterology China-Japan Friendship Hospital Ministry of Health

BACKGROUND: Diabetes mellitus (DM) is regarded as a new risk factor for hepatocellular carcinoma (HCC), but few studies have focused on the potential role of DM in the progression of cirrhosis to HCC as well as in patients with simple HBV infection. METHODS: A cohort of 1028 patients, treated at our hospital and with a hospital discharge diagnosis of HCC and/or cirrhosis, was screened. Among them, 558 were diagnosed with chronic HBV infection and 370 were analyzed statistically according to the diagnostic, inclusion and exclusion criteria. The demographic, clinical, metabolic, virological, biochemical, radiological and pathological features were analyzed and the multivariate logistic regression model was used to determine the potential role of DM. RESULTS: In 248 cirrhotic patients, 76 were diabetic and their mean duration of DM was 4.6 years. In 122 HCC patients with cirrhosis, 25 were diabetic and their mean duration of DM was 4.4 years. Univariate analysis showed that compared with cirrhotic patients, the HCC patients had a higher percentage in males (P=0.001), a lower percentage in DM patients (P=0.039), a higher percentage in cigarette smokers (P=0.005), a higher percentage in patients with AFP>400 ng/mL (P<0.001), higher values of white blood cells (P<0.001), hemoglobin (P<0.001) and platelet (P<0.001), increased levels of ALT (P<0.001) and GGT (P<0.001), higher total bilirubin (P=0.018) and albumin levels (P<0.001), and a lower international normalized ratio (P<0.001). Multivariate logistic regression analysis showed that DM was anindependent associated factor for HCC [odds ratio (OR)=0.376; 95% CI, 0.175-0.807; P=0.012]. Even after the HCC patients were restricted to those with decompensated cirrhosis and compared with decompensated cirrhotic patients, the similar result was observed (OR=0.192; 95% CI, 0.054-0.679; P=0.010). CONCLUSIONS: DM is an independent factor in the progression of cirrhosis to HCC, but the role may be contrar

关键词： diabetes mellitus hepatocellular carcinoma cirrhosis chronic hepatitis B

Advances in bio-inspired electrocatalysts for clean energy future

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Nano Research 2024年第2期17卷 515-533页

作者： jing-Wen Duan Mu Min-Rui gao Division of Nanomaterials&Chemistry Hefei National Laboratory for Physical Sciences at the MicroscaleDepartment of ChemistryUniversity of Science and Technology of ChinaHefei 230026China

Electrocatalysis can enable efficient energy storage and conversion and thus is an effective way to achieve carbon *** unique structure and function of organisms can offer many ideas for the design of electrocatalysts,which has become one of the most promising research ***,the understanding of the mechanism of bio-inspired electrocatalysis has become clearer,which has promoted the design of bio-inspired catalysts and catalytic *** bio-inspired catalysts(enzyme-like catalysts,layered porous catalysts,superhydrophobic/superhydrophilic surfaces,and so on)have been developed to enable efficient electrocatalytic ***,we discuss the key advances in the field of bio-inspired electrocatalysts progressed in recent ***,the role of bio-inspiration in increasing the intrinsic activity and number of active sites of catalysts is ***,the structure and mechanism of layered porous catalytic systems that mimic biological transport systems are comprehensively ***,the design of three-phase interfaces from micro-nanoscale to atomic scale is highlighted,including the wettability of the electrode surface and the transport system near the *** conclude the review by identifying challenges in bio-inspired electrocatalysts and providing insights into future prospects for the exciting research field.

关键词： bio-inspired electrocatalysts active sites layered porous structure three-phase interface

Optimization of projectile state and trajectory of reentry body considering attainment of carrying aircraft

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Journal of Systems Engineering and Electronics 2017年第1期28卷 137-144页

作者： Changsheng gao chunwang Jiang Wuxing jing School of Astronautics Harbin Institute of TechnologyHarbin 150001China

As an improvement of traditional maximum range trajectory optimization, both the projectile state and control sequence of reentry body are optimized to achieve the maximum range. To ensure the optimal projectile state is in the reachable domain of the carrying aircraft, the climb of the carrying aircraft and the flight of reentry body are optimized as a whole based on the hp-adaptive pseudospectral method. Meanwhile, the path constraints, control constraints and initial/terminal states constraints are considered in the optimization as well. In face of the fact that the range of the optimal control solution resulted from the pseudospectral method may be unsmooth, virtual control variables (second derivatives of the angle of attack and bank angle) are proposed in the optimization, while the angle of attack and bank angle are treated as the virtual state variables to guarantee the smoothness of the optimal control solution. The validity of the virtual control variables in smoothing the optimal control solution is verified by simulation, and the optimality of the resulting projectile state and control sequence for reaching the maximum range is confirmed using the indirect approach. © 1990-2011 Beijing Institute of Aerospace Information.

关键词： Aerodynamics Angle of attack Optimal control systems Projectiles