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Research 2024年第2期2023卷 329-337页

作者： Lei Liu Zhuzhu du Jiaqi Wang Hongfang du Sheng Wu Mengjun Li Yixuan Zhang Jinmeng Sun Zhipeng Sun Wei Ai Frontiers Science Center for Flexible Electronics(FSCFE)and Shaanxi Institute of Flexible Electronics(SIFE) Northwestern Polytechnical University(NPU)127 West Youyi RoadXi'an 710072China Fujian Cross Strait Institute of Flexible Electronics(Future Technologies) Fujian Normal UniversityFuzhou 350117China School of Materials and Energy Guangdong University of TechnologyGuangzhou510006 GuangdongChina

Soft carbons have attracted extensive interests as competitive anodes for fast-charging sodium-ion batteries(SIBs);however,the high-rate performance is still restricted by their large ion migration barriers and sluggish reaction ***,we show a molecular design approach toward the fabrication of nitrogen and phosphorus codoped mesoporous soft carbon(NPSC).The key to this strategy lies in the chemical cross-linking reaction between polyphosphoric acid and p-phenylenediamine,associated with pyrolysis induced in-situ self-activation that creates mesoporous structures and rich heteroatoms within the carbon *** to the enlarged interlayer spacing,reduced ion diffusion length,and plentiful active sites,the obtained NPSC delivers a superb rate capacity of 215 mAh g-1 at 10 A g-1 and an ultralong cycle life of 4,700 cycles at 5 A g^(-1).Remarkably,the full cell shows 99%capacity retention during 100 continuous cycles,and maximum energy and power densities of 191 Wh kg^(-1)and 9.2 kW kg^(-1),*** believe that such a synthetic protocol could pave a novel venue to develop soft carbons with unique properties for advanced SIBs.

关键词： kinetics carbons linking

Advancing neuroscience through real-time processing of big data:Transition from open-loop to closed-loop paradigms

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Zoological Research 2024年第3期45卷 518-519页

作者： Yu-Fan Wang Jiu-Lin du Institute of Neuroscience State Key Laboratory of NeuroscienceCenter for Excellence in Brain Science and Intelligence TechnologyChinese Academy of SciencesShanghai 200031China University of Chinese Academy of Sciences Beijing 100049China School of Life Science and Technology ShanghaiTech UniversityShanghai 200031China

The brain functions as a closed-loop system that continuously generates behavior in response to the external environment and adjusts actions based on the *** research methodologies in neuroscience,especially those employed in brain imaging experiments,have mainly adopted an open-loop paradigm(Grosenick et al.,2015).Functional neural circuits are analyzed offline and subsequently tested through manipulation of neuronal activities within specific regions or with genetic *** establishing a closed-loop research paradigm,functional ensembles can be detected and tested in real time with temporal *** functional ensembles,rather than brain regions or genetically labeled neural populations,serve as fundamental units of neural networks,offering valuable insights into the dissection of neural *** closed-loop research paradigm also enables the capture of high-dimensional activities of internal brain dynamics and precise elucidation of physiological processes such as learning,decision-making,and sleep.

关键词： neural loop Transition

XPull: A Relay-Based Blockchain Intercommunication Framework Achieving Cross-Chain State Pulling

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Chinese Journal of Electronics 2024年第5期33卷 1261-1273页

作者： Xinyu LIANG Jing CHEN Ruiying du School of Cyber Science and Engineering Wuhan University

Cross-chain technology, which enables different blockchains to intercommunicate with one another,is challenging. Many existing cross-chain platforms, such as Polkadot and Cosmos, generally adopt a relay-based scheme: A relaychain(relay blockchain) receives and records the state information from every parachain(parallel blockchain), and publish the information on the platform, by which parachains are able to efficiently acquire the state information from one another. In the condition when parachain is consortium blockchain, the cross-chain platform cannot work properly. On the one hand, whether state information is submitted to relaychain is completely decided by the internal decision of parachain. The timeliness of state information cannot be guaranteed. On the other hand, the transfer of state information will be interrupted due to the failure of parachain or relaychain-parachain connection. In this paper, we propose a relay-based blockchain intercommunication framework, called XPull(crosspulling). Specifically, to ensure the timeliness of state information, we propose a cross-chain state pulling scheme based on cosigned state pulling agreement. To solve the interruption of state transfer, we propose a random scheduling scheme to resume the transfer, or confirm the failure of parachain. The security analysis and experimental results demonstrate that XPull is secure and efficient.

关键词： Processor scheduling Real-time systems Blockchains Consensus protocol Security Relays Blockchain interoperability Cross-chain State pulling

Special Issue: Functional Polymer Materials

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Chinese Journal of Polymer Science 2024年第7期42卷 895-896,I0004页

作者： Jun-Wei, Gu du-Jin, Wang Northwestern Polytechnical University Shaanxi Key Laboratory of Macromolecular Science and Technology School of Chemistry and Chemical Engineering Xi’an China (GRID:grid.440588.5) (ISNI:0000 0001 0307 1240) Chinese Academy of Sciences Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Engineering Plastics Institute of Chemistry Beijing China (GRID:grid.9227.e) (ISNI:***)

The rapid development of science has led to a significant role for polymer materials in multitude fields,including industry,medicine,energy,and the environment,*** a leading academic journal in the field of polymer,Chinese Journal of Polymer Science has been dedicated to fostering the advancement and utilization of polymer science.

关键词： polymer Polymer Functional

Cleaner production of 3.5 valent vanadium electrolyte from ammonium metavanadate by ammonia reduction-sulfuric acid dissolution method

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Tungsten 2024年第3期6卷 555-560页

作者： Cheng Wang Lan-Jie Li Hao du College of Chemical Engineering University of Chinese Academy of Sciences Institute of Process Engineering National Engineering Research Center of Green Recycling for Strategic Metal Resources Chinese Academy of Sciences Hesteel Group Company Limited

The vanadium redox flow battery(VRFB) has been widely used in large-scale energy storage areas due to the advantages of long lifespan and high safety. However, the high preparation cost of vanadium electrolyte limits ... 详细信息

关键词： Ammonia

A Deep Learning Method to Process Scattered Field Data in Biomedical Imaging System

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Journal of Beijing Institute of Technology 2024年第3期33卷 213-218页

作者： Jing Wang Naike du Xiuzhu Ye School of Information and Electronics Beijing Institute of TechnologyBeijing 100081China

This paper proposed a deep-learning-based method to process the scattered field data of transmitting antenna,which is unmeasurable in inverse scattering system because the transmitting and receiving antennas are multiplexed.A U-net convolutional neural network(CNN)is used to recover the scattered field data of each transmitting *** numerical results proved that the proposed method can complete the scattered field data at the transmitting antenna which is unable to measure in the actual experiment and can also eliminate the reconstructed error caused by the loss of scattered field data.

关键词： inverse problem scattered field deep learning

Westward Migration of Tropical Cyclone Activity in the Western North Pacific during 1982–2020:Features and Possible Causes

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Journal of Meteorological Research 2024年第1期38卷 1-9页

作者： Jian ZHONG Huadong du Yuqin WU Yuehua PENG China Satellite Maritime Tracking and Control Department Jiangyin 2144312 College of Advanced Interdisciplinary Studies National University of Defense TechnologyChangsha 4100733 Dalian Naval Academy Dalian 1160184 Institute of Atmospheric Physics Chinese Academy of SciencesBeijing 100029

The westward migration of tropical cyclone(TC)activity has been identified in the western North Pacific(WNP),but the related features and causes remain ***,based on the best track data from China,Japan,and the US,and the NCEP–NCAR reanalysis data in 1982–2020,we investigate characteristics of the westward migration of the WNP TC activity with various metrics,and reveal possible causes for the migration of TC tracks through analyzing its seasonality and dependence on environmental *** results show that the WNP TCs show significant westward migrations in a number of metrics,including location of tracks,genesis,the first track point at which TC reaches its lifetime-maximum intensity,and the last track point in the TC *** is found that TC tracks exhibit more significant westward migrations in the easterly steering flow than in the westerly steering ***,the TC longitude shift shows notable seasonal variations,for which the TCs in the easterlies move further west than those in the westerlies during July–September,vice versa during October–*** dependence of the westward migration of TC tracks on background steering flow is associated with the different environmental *** westward shift in the westerly steering is mainly due to the reduced vertical wind shear(VWS),while the weakened zonal easterly steering and reduced VWS are both closely related to the westward migration in the easterly *** results have important implications for understanding current and future variations in TC longitude shift.

关键词： tropical cyclone westward migration steering flow vertical wind shear

Mechanical behavior of nanorubber reinforced epoxy over a wide strain rate loading

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Nano Materials Science 2024年第1期6卷 106-114页

作者： Yinggang Miao Jianping Yin Wenxuan du Lianyang Chen Joint International Research Laboratory of Impact Dynamics and Its Engineering Applications School of AeronauticsNorthwestern Polytechnical UniversityXi'anShaanxi710072China State Key Laboratory for Strength and Vibration of Mechanical Structures Xi'an Jiaotong UniversityXi'anShaanxi710049China Shaanxi Key Laboratory of Impact Dynamics and Its Engineering Application School of AeronauticsNorthwestern Polytechnical UniversityXi'anShaanxi710072China

Nanorubber/epoxy composites containing 0,2,6 and 10 wt%nanorubber are subjected to uniaxial compression over a wide range of strain rate from 8×10^(-4) s^(-1) to~2×10^(4) s^(-1).Unexpectedly,their strain rate sensitivity and strain hardening index increase with increasing nanorubber *** mechanisms are proposed based on numerical simulations using a unit cell *** increase in the strain rate sensitivity with increasing nanorubber content results from the fact that the nanorubber becomes less incompressible at high strain,generating a higher hydro-static *** shear localization starts to occur in the epoxy under a strain rate of 22,000 s^(-1) when the strain exceeds *** presence of nanorubber in the epoxy reduces adiabatic shear localization by preventing it from propagating.

关键词： Strain rate Strain hardening Nano rubber Epoxy Adiabatic shearing localization

Formulation,characterization and in vivo and in vitro evaluation of aloe-emodin-loaded solid dispersions for dissolution enhancement

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Journal of Traditional Chinese Medicine 2024年第1期44卷 54-62页

作者： LI Xiuyan LUO Yuting WANG Jinhui du Zhimin Key Laboratory of Basic and Application Research of Beiyao Heilongjiang University of Chinese MedicineMinistry of EducationHarbin 150040China College of Pharmacy Harbin Medical UniversityHarbin 150081China Institute of Clinical Pharmacology the Second Affliated Hospital of Harbin Medical University(University Key aboratory of Drug ResearchHeilongjiang Province)Harbin 150086China Department of Clinical Pharmacology College of Pharmacy Harbin Medical UniversityHarbin 150081China State Key Laboratory of Quality Research in Chinese Medicines Macao University of Science and TechnologyMacao 999078China

OBJECTIVE:To prepare aloe-emodin solid dispersion(AE-SD)and determine the metabolic process of AE and AE-SD in ***:AE-SD was prepared via solvent evaporation or solvent melting using PEG-6000 and PVP-K30 as *** analysis,X-ray diffraction spectroscopy,differential scanning calorimetry,Fourier transform infrared spectroscopy and scanning electron microscopy were used to identify the physical state of *** prescriptions were screened via the dissolution degree determination *** Phoenix software,AE suspension and AE-SD were subjected to a pharmacokinetic comparison study analyzing the alteration of behavior in vivo after AE was prepared as a solid *** toxicity was assessed in mice,and the physiological toxicity was used as the determination criterion for ***:AE-SD showed that AE existed in the carrier in an amorphous *** with polyethylene glycol,polyvinylpyrrolidone(PVP)inhibited AE crystallization,causing the drug to transform from a dense crystalline state to an amorphous form and increasing the degree of drug ***,it was more suitable as a carrier material for *** addition of poloxamer(POL)was more beneficial to the stability of solid dispersions and could reduce the amount of *** dissolution test confirmed that the optimal ratio of AE to the composite vector AE-PVP-POL was 1:2:2,and its dissolution effect was also *** on the pharmacokinetic comparison,the drug absorption was faster and quickly reached the peak of blood drug concentration in AE-SD compared to AE,the Cmax of AE-SD was greater than that of AE,and t1/2 and mean residence time of AE-SD were less than *** results showed that the drug metabolism in AE-SD was better,and the residence time was *** toxicology study showed that both AE and AE-SD had no ***:This paper established that the solubility of the drug could be increased after preparing a solid dispersion,

关键词： aloe-emodin solid dispersion solvent evaporation drug liberation pharmacokinetics

High Energy Efficiency Dynamic Connected Hybrid Precoding for mm Wave Massive MIMO Systems

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China Communications 2024年第5期21卷 36-44页

作者： du Ruiyan Liu Huajing Li Tiangui Liu Fulai Lab of Key Technology of Millimeter-wave Large-scale MIMO System Northeastern University at QinhuangdaoQinhuangdao066004China School of Computer Science and Engineering Northeastern UniversityShenyang 110819China

This paper considers a high energy efficiency dynamic connected(HEDC)structure,which promotes the practicability and reduces the power consumption of hybrid precoding system by lowresolution phase shifters(PSs).Based on the proposed structure,a new hybrid precoding algorithm is presented to optimize the energy efficiency,namely,HP-HEDC ***,via a new defined effective optimal precoding matrix,the problem of optimizing the analog switch precoding matrix is formulated as a sparse representation ***,the optimal analog switch precoding matrix can be readily obtained by the branch-and-bound ***,the digital precoding matrix optimization problem is modeled as a dictionary update problem and solved by the method of optimal direction(MOD).Finally,the diagonal entries of the analog PS precoding matrix are optimized by exhaustive search independently since PS and antenna is *** results show that the HEDC structure enjoys low power consumption and satisfactory spectral *** proposed algorithm presents at least 50%energy efficiency improvement compared with other algorithms when the PS resolution is set as 3-bit.

关键词： energy efficiency hybrid precoding mmWave optimized resolution phase shifter