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Variational Neural Inference Enhanced Text Semantic Communication System

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China Communications 2024年第7期21卷 50-64页

作者： Zhang Xi Zhang yiqian Li Congduan Ma Xiao School of Electronics and Communication Engineering Sun Yat-Sen UniversityShenzhen 518107China Guizhou University State Key Laboratory of Public Big Data Guiyang 550025China Shenzhen Key Laboratory of Navigation and Communication Integration Shenzhen 518107China School of Computer Science and Engineering Sun Yat-Sen UniversityGuangzhou 510006China

Recently,deep learning-based semantic communication has garnered widespread attention,with numerous systems designed for transmitting diverse data sources,including text,image,and speech,*** efforts have been directed toward improving system performance,many studies have concentrated on enhancing the structure of the encoder and ***,this often overlooks the resulting increase in model complexity,imposing additional storage and computational burdens on smart ***,existing work tends to prioritize explicit semantics,neglecting the potential of implicit *** paper aims to easily and effectively enhance the receiver's decoding capability without modifying the encoder and decoder *** propose a novel semantic communication system with variational neural inference for text ***,we introduce a simple but effective variational neural inferer at the receiver to infer the latent semantic information within the received *** information is then utilized to assist in the decoding *** simulation results show a significant enhancement in system performance and improved robustness.

关键词： deep learning semantic communication variational neural inference

Development of a Three-Dimensional Multiscale Octree SBFEM for Viscoelastic Problems of Heterogeneous Materials

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Computer Modeling in Engineering & Sciences 2024年第8期140卷 1831-1861页

作者： Xu Xu Xiaoteng Wang Haitian Yang Zhenjun Yang yiqian He State Key Laboratory of Structural Analysis Optimization and CAE Software for Industrial EquipmentDepartment of Engineering MechanicsDalian University of TechnologyDalian116024China Hubei Key Laboratory of Geotechnical and Structural Safety School of Civil EngineeringWuhan UniversityWuhan430072China Mechanik–Materialtheorie Ruhr-Universität BochumBochum44801Germany

The multiscale method provides an effective approach for the numerical analysis of heterogeneous viscoelastic materials by reducing the degree of freedoms(DOFs).A basic framework of the Multiscale Scaled Boundary Finite Element Method(MsSBFEM)was presented in our previous works,but those works only addressed two-dimensional *** order to solve more realistic problems,a three-dimensional MsSBFEM is further developed in this *** the proposed method,the octree SBFEM is used to deal with the three-dimensional calculation for numerical base functions to bridge small and large scales,the three-dimensional image-based analysis can be conveniently conducted in small-scale and coarse nodes can be flexibly adjusted to improve the computational ***,the Temporally Piecewise Adaptive Algorithm(TPAA)is used to maintain the computational accuracy of multiscale analysis by adaptive calculation in time *** results of numerical examples show that the proposed method can significantly reduce the DOFs for three-dimensional viscoelastic analysis with good *** instance,the DOFs can be reduced by 9021 times compared with Direct Numerical Simulation(DNS)with an average error of 1.87%in the third example,and it is very effective in dealing with three-dimensional complex microstructures directly based on images without any geometric modelling process.

关键词： Three-dimensionalmultiscale viscoelastic analysis numerical base functions octree SBFEM image-based analysis temporally piecewise adaptive algorithm

Mediated electron transfer process in α-MnO_(2)catalyzed Fenton-like reaction for oxytetracycline degradation

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Chinese Chemical Letters 2024年第8期35卷 367-372页

作者： yiqian Jiang Zihan Yang Xiuru Bi Nan Yao Peiqing Zhao Xu Meng State Key Laboratory for Oxo Synthesis and Selective Oxidation Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China University of Chinese Academy of Sciences Beijing 100049China

In Fenton-like oxidation,the catalyst directly influences the reaction mechanism for the degradation of pollutants from ***,a α-MnO_(2)catalyst(OAm-1)was synthesized via a self-assembly method with the assistance of a ***-1 possessed a large specific surface area of_(2)21 m2/g,abundant mesoporous structures and a large proportion of Mn(III).Further characterization exhibited that OAm-1 had abundant oxygen vacancies and excellent reducibility and *** adsorption and catalytic ability of OAm-1 were studied in the degradation of oxytetracycline(OTC)via the activation of hydrogen peroxide(H_(2)O_(2)).Through the radical quenching experiments,electron resonance spectroscopy(EPR),X-ray photoelectron spectroscopy(XPS)and Fourier-transform infrared spectroscopy(FT-IR)analysis,Mn(III)of OAm-1 was proved to be the active sites for the chemisorption of *** electrochemical ex-periments and analysis have shown that a process of electron transfer mediated by OAm-1 occurred be-tween the pollutant and H_(2)O_(2)during a Fenton-like *** work experimentally verifies the elec-tron transfer process dominated nonradical mechanism overα-MnO_(2),which is helpful for understanding the catalytic mechanism of the Fenton-like oxidation.

关键词： Mediated electron transfer Hydrogen peroxide Oxidative degradation Manganese oxide Fenton oxidation

Targeted metabolomics reveals the aberrant energy status in diabetic peripheral neuropathy and the neuroprotective mechanism of traditional Chinese medicine jinMaiTong

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Journal of Pharmaceutical Analysis 2024年第2期14卷 225-243页

作者： Bingjia Zhao Qian Zhang yiqian He Weifang Cao Wei Song Xiaochun Liang Department of Traditional Chinese Medicine Peking Union Medical College HospitalPeking Union Medical CollegeChinese Academy of Medical SciencesBeijing100730China Institute of Basic Medicine Sciences Chinese Academy of Medical SciencesBeijing100005China Medical Research Center Peking Union Medical College HospitalPeking Union Medical CollegeChinese Academy of Medical SciencesBeijing100730China

Diabetic peripheral neuropathy (DPN) is a common and devastating complication of diabetes, for which effective therapies are currently lacking. Disturbed energy status plays a crucial role in DPN pathogenesis. However, the integrated profile of energy metabolism, especially the central carbohydrate metabolism, remains unclear in DPN. Here, we developed a metabolomics approach by targeting 56 metabolites using high-performance ion chromatography-tandem mass spectrometry (HPIC-MS/MS) to illustrate the integrative characteristics of central carbohydrate metabolism in patients with DPN and streptozotocin-induced DPN rats. Furthermore, jinMaiTong (JMT), a traditional Chinese medicine (TCM) formula, was found to be effective for DPN, improving the peripheral neurological function and alleviating the neuropathology of DPN rats even after demyelination and axonal degeneration. JMT ameliorated DPN by regulating the aberrant energy balance and mitochondrial functions, including excessive glycolysis restoration, tricarboxylic acid cycle improvement, and increased adenosine triphosphate (ATP) generation. Bioenergetic profile was aberrant in cultured rat Schwann cells under high-glucose conditions, which was remarkably corrected by JMT treatment. In-vivo and in-vitro studies revealed that these effects of JMT were mainly attributed to the activation of adenosine monophosphate (AMP)-activated protein kinase (AMPK) and downstream peroxisome proliferator-activated receptor gamma coactivator 1-alpha (PGC-1α). Our results expand the therapeutic framework for DPN and suggest the integrative modulation of energy metabolism using TCMs, such as JMT, as an effective strategy for its treatment.

关键词： Diabetic peripheral neuropathy jinMaiTong Energy metabolism Targeted metabolomics Adenosine monophosphate-activated protein kinase

Distinguishing the observational signatures of hot spots orbiting Reissner-Nordström spacetime

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Chinese Physics C 2024年第7期48卷 221-230页

作者：吴天枢陈一千 Center for Theoretical Physics College of PhysicsSichuan UniversityChengdu 610064China

This paper investigates observable signatures of hot spots orbiting Reissner-Nordström(RN)black holes and naked *** an RN black hole,we find two discernible lensing image tracks in time integrated images,capturing a complete orbit of hot spots and a image shadow within the critical curve where photons with a small impact parameter fall into the event ***,in RN singularities,additional image tracks can be found within the critical curve,originating from photons reflected by the infinitely high effective potential ***,we find incomplete and converging tracks from the time integrated images of hot spot orbiting RN singularities that have no photon *** presence of these additional image tracks significantly influences temporal magnitudes at their local maxima,enabling us to differentiate between RN black holes and RN naked singularities.

关键词： astrometry gravitational lensing black hole physics D0I:10.1088/1674-1137/ad3c2d

Styrax japonicus functional genomics:an efficient virus induced gene silencing(VIGS)system

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Horticultural Plant Journal 2024年第1期10卷 252-258页

作者： Gangyu Sun yiqian Ju Cuiping Zhang Lulu Li Xinqiang Jiang Xiaoman Xie Yizeng Lu Kuiling Wang Wei Li College of Landscape Architecture and Forestry Qingdao Agricultural UniversityQingdaoShandong 266109China Shandong Provincial Center of Forest and Grass Germplasm Resources JinanShandong 250102China

VIGS(Virus-induced gene silencing),a method for posttranscriptional gene silencing,is an effective technique for investigating the activities of genes in *** there is no report for available VIGS system in Styrax japonicus,the application of a VIGS approach that results in a gene knockdown to study gene function is *** this study,we compared the characteristics that could affect the viability of VIGS in ***,including the acetosyringone(AS)concentration,the Agrobacterium’s optical density and the inoculation *** stable reference genes of *** were selected to validate the gene’s knockdown by quantitative *** a result,we successfully constructed 2 VIGS systems based on TRV virus:vacuum with AS concentration of 200μmol·L^(-1)and OD600of 0.5,and friction-osmosis with AS concentration of 200μmol·L^(-1)and OD600of 1.0,which silencing efficiency was 83.33%and 74.19%,*** successfully applied VIGS method provides a rapid and effective reverse gene functional analysis approach in *** to identify unknown gene functions.

关键词： Styrax japonicus VIGS Reference gene

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柔性抗冻导电凝胶的构筑

高分子材料科学与工程 2024年第6期40卷 144-151页

作者：徐艺倩卢麒麟闽江学院福建省新型功能性纺织纤维及材料重点实验室福建福州350108

为解决传统水凝胶材料在低温时发生冻结,导致其部分力学功能丧失的问题,文中利用甘油体系纳米纤维素(CNC)与α-硫辛酸之间的氢键,再以FeCl3为交联剂,进一步诱导硫辛酸聚合形成凝胶网络,构筑了柔性抗冻导电凝胶CNC/α-硫辛酸凝胶。该凝... 详细信息

为解决传统水凝胶材料在低温时发生冻结,导致其部分力学功能丧失的问题,文中利用甘油体系纳米纤维素(CNC)与α-硫辛酸之间的氢键,再以FeCl3为交联剂,进一步诱导硫辛酸聚合形成凝胶网络,构筑了柔性抗冻导电凝胶CNC/α-硫辛酸凝胶。该凝胶具有优异的力学性能、导电性能及灵敏的应变传感性能。CNC/α-硫辛酸凝胶的拉伸性能和抗冻测试表明,甘油体系纳米纤维素含量为1.5 g时,凝胶的拉伸断裂应力达到16 kPa,断裂伸长率为805.5%,且在-40℃的低温条件下电导率仍能维持在0.029S/m,抗冻导电性能良好。应变传感性能测试表明,凝胶具有灵敏的应变传感能力,在应变150%~200%时,凝胶的灵敏度系数(GF)值达到2.36,能够进行人体运动监测,表明CNC/α-硫辛酸凝胶可作为柔性应变传感器用于智能可穿戴设备。

关键词：纳米复合凝胶柔性抗冻导电应变传感纳米纤维素 α-硫辛酸

Overcoming genotypic dependency and bypassing immature embryos in wheat transformation by using morphogenic regulators

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Science China(Life Sciences) 2024年第7期67卷 1535-1538页

作者： Ziru Zhou Yawen Yang Guo Ai Miaomiao Zhao Baozhu Han Chunjie Zhao yiqian Chen Yuwei Zhang Hong Pan Caixia Lan Chao He Qiang Li Jieting Xu Wenhao Yan National Key Laboratory of Crop Genetic Improvement Hubei Hongshan LaboratoryHuazhong Agricultural UniversityWuhan 430070China WIMI Biotechnology Co. Ltd.Changzhou 213025China

Dear Editor,Agrobacterium-mediated transformation technology is of vital importance for functional genomics studies and precision breeding in crops due to low cost and clear genetic manifestation.A morphogenic gene pa... 详细信息

关键词： breeding crops transformation

“三全育人”视阈下大学生就业胜任力培养路径研究

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科教导刊 2022年第9期 146-148页

作者：安杰晶金意倩吴昊河海大学海洋学院江苏南京210098

“三全育人”视域下培养新时代大学生就业胜任力,不仅可以帮助大学生合理进行生涯规划,有意识地提高自身就业能力,也能给毕业生择业提供帮助。文章针对新时代大学生就业胜任力培养过程中存在的一系列实际问题及培养路径进行了详细分析,... 详细信息

“三全育人”视域下培养新时代大学生就业胜任力,不仅可以帮助大学生合理进行生涯规划,有意识地提高自身就业能力,也能给毕业生择业提供帮助。文章针对新时代大学生就业胜任力培养过程中存在的一系列实际问题及培养路径进行了详细分析,积极促进新时代大学生就业胜任力的培养工作。

关键词：三全育人就业胜任力培养路径