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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： Gu, Jun-Wei Wang, du-Jin shaanxi Key Laboratory of Macromolecular science and Technology School of Chemistry and Chemical Engineering Northwestern Polytechnical University Xi’an China Beijing National Laboratory for Molecular sciences CAS Key Laboratory of Engineering Plastics Institute of Chemistry Chinese Academy of Sciences Beijing China

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

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

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

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

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

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

Energy-efficient reconfigurable processor for QC-LDPC via adaptive coding-voltage-frequency tuning

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The Journal of China Universities of Posts and Telecommunications 2024年第2期31卷 72-84页

作者： Chang Libo Hu Yiqing du Huimin Wang Jihe school of Electronic Engineering Xi'an University of Posts and TelecommunicationsXi'an 710121China school of Computer science Northwestern Polytechnical UniversityXi'an 710072China

To apply a quasi-cyclic low density parity check(QC-LDPC)to different scenarios,a data-stream driven pipelined macro instruction set and a reconfigurable processor architecture are proposed for the typical QC-LDPC *** data-level parallelism is improved by instructions to dynamically configure the multi-core computing ***,an intelligent adjustment strategy based on a programmable wake-up controller(WuC)is designed so that the computing mode,operating voltage,and frequency of the QC-LDPC algorithm can be *** adjustment can improve the computing efficiency of the *** QC-LDPC processors are verified on the Xilinx ZCU102 field programmable gate array(FPGA)board and the computing efficiency is *** experimental results indicate that the QC-LDPC processor can support two encoding lengths of three typical QC-LDPC algorithms and 20 adaptive operating modes of operating voltage and *** maximum efficiency can reach up to 12.18 Gbit/(s·W),which is more flexible than existing state-of-the-art processors for QC-LDPC.

关键词： quasi-cyclic low density parity check(QC-LDPC) dynamic voltage and frequency scaling(DVFs) reconfigurable computing coarse-grained reconfigurable arrays(CGRAs)

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Precise determination of the pole position of the exotic Z_(c)(3900)

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science China(Physics,Mechanics & Astronomy) 2024年第9期67卷 84-90页

作者： Yun-Hua Chen Meng-Lin du Feng-Kun Guo school of Mathematics and Physics University of Science and Technology BeijingBeijing 100083China school of Physics University of Electronic Science and Technology of ChinaChengdu 611731China CAs Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China school of Physical sciences University of Chinese Academy of SciencesBeijing 100049China Peng Huanwu Collaborative Center for Research and Education Beihang UniversityBeijing 100191China

We perform a unified description of the experimental data of the π^(+)π^(-)and J/ψπ^(±)invariant mass spectra for e^(+)e^(-)→J/ψπ^(+)π^(-)and the D^(0)D^(*-)mass spectrum for e^(+)e^(-)→D^(0)D^(*-)π^(+)at e^(+)e^(-)center-of-mass energies 4.23 and 4.26 *** analysis takes into account open-charm meson loops that contain triangle singularities,the J/ψπ-DD^(*)coupled-channel interaction respecting unitarity,and the strong ππ-KK final state interaction using dispersion *** analysis leads to a precise determination of the Z_(c)(3900)pole with the pole mass and width(3880.7±1.7_(stat)±22.4_(syst))MeV and(35.9±1.4_(stat)±15.3_(syst))MeV,respectively,and hints at that the DD^(*)molecular and non-molecular components are of similar importance in the Z_(c)(3900)formation.

关键词： exotic hadrons dispersion relations final state interaction triangle singularity