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基于短波通信的配网变压器绕组材质辨识技术研究

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通信电源技术 2024年第16期41卷 222-224页

作者：刘世鹏国网宁夏电力有限公司石嘴山供电公司宁夏石嘴山753000

配网变压器绕组材质辨识技术是电力系统中用于确保设备正常运行和延长使用寿命的重要技术。由于短波通信技术具有优越的穿透能力和广泛的覆盖范围,它为变压器绕组材质的非侵入式识别提供了一种有效手段。短波通信技术的工作原理涉及电... 详细信息

配网变压器绕组材质辨识技术是电力系统中用于确保设备正常运行和延长使用寿命的重要技术。由于短波通信技术具有优越的穿透能力和广泛的覆盖范围,它为变压器绕组材质的非侵入式识别提供了一种有效手段。短波通信技术的工作原理涉及电磁波的特定行为,其与变压器绕组材质的相互作用能够显著影响信号的传播特性,从而使材质的辨识成为可能。文章系统地探讨了基于短波通信的配网变压器绕组材质辨识技术,详细介绍了实验设计、数据处理方法以及分析技术的实施过程,展示了如何通过调整短波通信设备和优化信号处理策略来提高识别准确率和效率。

关键词：短波通信配网变压器绕组材质辨识技术

施氮对紫花苜蓿干旱复水后生长恢复能力的影响

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草业科学 2024年第3期41卷 620-627页

作者：臧军蕊张钰婷张英豪刘洋铭邓文慧刘世鹏孙娈姿西北农林科技大学草业与草原学院陕西杨凌712100 延安大学生命科学学院陕西延安716000

植物复水后的生长恢复能力是体现植物干旱适应性的重要方面。施氮是常见的栽培措施,但施氮对紫花苜蓿(Medicago sativa)复水后生长恢复能力的影响尚不明晰。本研究在低氮(3 mmol·L^(−1))和高氮(7 mmol·L^(−1))处理下对紫花苜蓿进行水... 详细信息

植物复水后的生长恢复能力是体现植物干旱适应性的重要方面。施氮是常见的栽培措施,但施氮对紫花苜蓿(Medicago sativa)复水后生长恢复能力的影响尚不明晰。本研究在低氮(3 mmol·L^(−1))和高氮(7 mmol·L^(−1))处理下对紫花苜蓿进行水培,在培养液中添加聚乙二醇-6000模拟干旱-复水情况,在干旱结束当天、复水7 d以及24 d,测定紫花苜蓿地上和地下部的生物量、含氮量、非结构性碳水化合物以及相关酶活性。结果显示,复水24 d时,高氮处理的总生物量高于对照组(未受干旱处理)11.0%,发生了“补偿生长”,而低氮处理的生长尚未恢复,生物量低于对照组19.6%。由于“干旱记忆”,复水7 d以及24 d时,高氮处理的根冠比、根系中淀粉和可溶性糖含量显著增加(P0.05)。复水7 d,高氮下紫花苜蓿叶片蔗糖磷酸合成酶(SPS)活性下降,而蔗糖合成酶(SS)和根中酸性转化酶(AI)活性显著提高(P<0.05)。复水24 d时,与低氮处理相比,高氮处理更明显地提高了SS活性(P<0.05)。结果表明,施氮通过增强植物叶片SS酶活性,提高根系干物质、淀粉和可溶性糖的积累,从而增强紫花苜蓿复水后的生长恢复能力。

关键词：抗旱性恢复力供氮量根冠比可溶性糖淀粉蔗糖代谢相关酶

功能性鸡蛋销售模式及实践探讨——以湖南省鹏晖农牧有限公司功能性鸡蛋销售为例

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现代畜牧科技 2024年第8期 131-133页

作者：谢周松孙杰龙刘卫波陈正波刘石鹏益阳市农业科学院湖南益阳413046 湖南省家禽产业体系湘北试验站湖南益阳413000 湖南省鹏辉农牧有限公司湖南益阳413500

随着我国数字经济的发展和人民对高品质农产品需求的提升,越来越多销售平台选择将特色农产品与数字经济进行充分融合与创新,通过网络营销的模式走进日常生活。近年蛋鸡产业发展迅速,也进入严重内卷时代,如何突围蛋鸡产业发展的瓶颈是目... 详细信息

随着我国数字经济的发展和人民对高品质农产品需求的提升,越来越多销售平台选择将特色农产品与数字经济进行充分融合与创新,通过网络营销的模式走进日常生活。近年蛋鸡产业发展迅速,也进入严重内卷时代,如何突围蛋鸡产业发展的瓶颈是目前产业需要探讨的主要问题,该文主要探讨功能性鸡蛋的销售模式与实践。

关键词：数字经济网络营销内卷功能性鸡蛋销售模式

A Wind Power Prediction Framework for Distributed Power Grids

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Energy Engineering 2024年第5期121卷 1291-1307页

作者： Bin Chen Ziyang Li shipeng Li Qingzhou Zhao Xingdou liu Power Grid Design Institute Shandong Electric Power Engineering Consulting Institute Co.Ltd.Jinan250013China School of Electrical Engineering Shandong UniversityJinan250012China

To reduce carbon emissions,clean energy is being integrated into the power *** power is connected to the grid in a distributed form,but its high variability poses a challenge to grid *** article combines wind turbine monitoring data with numerical weather prediction(NWP)data to create a suitable wind power prediction framework for distributed ***,high-precision NWP of the turbine range is achieved using weather research and forecasting models(WRF),and Kriging interpolation locates predicted meteorological data at the turbine ***,a preliminary predicted power series is obtained based on the fan’s wind speed-power conversion curve,and historical power is reconstructed using variational mode decomposition(VMD)filtering to form input variables in chronological ***,input variables of a single turbine enter the temporal convolutional network(TCN)to complete initial feature extraction,and then integrate the outputs of all TCN layers using Long Short Term Memory Networks(LSTM)to obtain power prediction sequences for all turbine *** proposed method was tested on a wind farm connected to a distributed power grid,and the results showed it to be superior to existing typical methods.

关键词： Wind power prediction distributed power grid WRF mode deep learning variational mode decomposition

UNCONDITIONAL CONVERGENCE AND ERROR ESTIMATES OF A FULLY DISCRETE FINITE ELEMENT METHOD FOR THE MICROPOLAR NAVIER-STOKES EQUATIONS

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Journal of Computational Mathematics 2024年第1期42卷 71-110页

作者： shipeng Mao Jiaao Sun Wendong Xue NCMIS LSECInstitute of Computational Mathematics and Scientific/Enginnering ComputingAcademy of Mathematics and Systems ScienceChinese Academy of SciencesBeijing 100190China School of Mathematical Sciences University of Chinese Academy of SciencesBeijing 100049China

In this paper,we consider the initial-boundary value problem(IBVP)for the micropolar Naviers-Stokes equations(MNSE)and analyze a first order fully discrete mixed finite element *** first establish some regularity results for the solution of MNSE,which seem to be not available in the ***,we study a semi-implicit time-discrete scheme for the MNSE and prove L2-H1 error estimates for the time discrete ***,certain regularity results for the time discrete solution are establishes *** on these regularity results,we prove the unconditional L2-H1 error estimates for the finite element solution of ***,some numerical examples are carried out to demonstrate both accuracy and efficiency of the fully discrete finite element scheme.

关键词： Micropolar fluids Regularity estimates Euler semi-implicit scheme Mixed finite element methods Unconditional convergence

Heteroatom Doped Graphdiyne and Analogues:Synthesis,Structures and Applications

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Chemical Research in Chinese Universities 2021年第6期37卷 1213-1223页

作者： MAN Yixiao ZHAO Jinyu liu shipeng PAN Qingyan ZHAO Yingjie College of Polymer Science and Engineering Qingdao University of Science and TechnologyQingdao266042P.R.China

As a new carbon allotrope,graphdiyne(GDY)has shown intensive practical application prospects in the energy field,catalysis,gas separation,etc.,due to its unique 2Dπ-conjugated structure,rich sp-hybridized carbon atoms and semiconductor *** efforts have been made to the development of well-defined GDY materials in recent *** doping heteroatoms can further tune the structures,semiconductor properties of GDY,and expand the promising *** review summarized a comprehensive development of heteroatom doped GDYs,including their synthesis,structures,properties,applications in nanotechnology,as well as the forecast in the future.

关键词： Graphdiyne Carbon material 2D material Hetero-atom doping

The IDD Transcription Factors:Their Functions in Plant Development and Environmental Response

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Phyton-International Journal of Experimental Botany 2024年第1期93卷 63-79页

作者： Jing liu Defeng Shu Zilong Tan Mei Ma Huanhuan Yang Ning Guo shipeng Li Dayong Cui School of Life Sciences Qilu Normal UniversityJinan250200China School of Life Sciences Shandong Normal UniversityJinan250014China

INDETERMINATE-DOMAIN proteins(IDDs)are a plant-specific transcription factor family characterized by a conserved ID domain with four zinc finger *** studies have demonstrated that IDDs coordinate a diversity of physiological processes and functions in plant growth and development,including floral transition,plant architecture,seed and root development,and hormone *** this review,we especially summarized the latest knowledge on the functions and working models of IDD members in Arabidopsis,rice,and maize,particularly focusing on their role in the regulatory network of biotic and abiotic environmental responses,such as gravity,temperature,water,and *** these mechanisms underlying the function of IDD proteins in these processes is important for improving crop yields by manipulating their ***,the review offers valuable insights into the functions and mechanisms of IDD proteins in plants,providing a foundation for further research and potential applications in agriculture.

关键词： INDETERMINATE DOMAIN flowering time root development shoot gravitropism plant immunity hormonal signaling environmental responses

Formation behaviors of rod-like reactive shaped charge penetrator and their effects on damage capability

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Defence Technology（防务技术） 2024年第2期32卷 242-253页

作者： Tao Sun Haifu Wang shipeng Wang Chao Ge Die Hu Pengwan Chen Yuanfeng Zheng Beijing Institute of Technology State Key Laboratory of Explosion Science and TechnologyBeijing100081China Xi'an Institute of Electromechanical Information Technology Xi'an710065China

Formation behaviors of rod-like reactive shaped charge penetrator(RRSCP)and their effects on damage capability are investigated by experiments and numerical *** pulsed X-ray technology and a spaced aluminum/steel plate with the thicknesses of 5 mm/100 mm are *** types of sphericalsegment aluminum-polytetrafluoroethylene-copper(Al-PTFE-Cu)reactive liners with Cu contents of 0%,46.6%,and 66%are fabricated and *** experimental results show that the reactive liners can form excellent rod-shaped penetrators with tail skirts under the shaped charge effect,but the tail skirts disappear over ***,rupturing damage to the aluminum plate and penetration to the steel plate are caused by the RRSCP *** simulation analysis,the RRSCP is formed by a mechanically and chemically coupled response with the reactive liner activated by shock in its outer walls and bottom and then backward overturning,forming a leading reactive penetrator and a following chemical energy *** unique formation structure determines the damage modes of the aluminum plate and the steel *** analysis indicates that the formation behaviors and damage capability of Al-PTFE-Cu RRSCP strongly depend on Cu *** increasing Cu content,the velocity,activation extent,and reaction extent of Al-PTFE-Cu RRSCP decrease,which contribute to elongation and alleviate the negative effects of chemical reactions on elongation,significantly increasing the length-diameter ratio and thus enhancing the capability of steel plate ***,the lower activation extent and energetic density will weaken the RRSCP's capability of causing rupturing damage to the aluminum plate.

关键词： Reactive materials Al-PTFE composites Reactive liner X-ray Penetration

Key role of interferon regulatory factor 1(IRF-1)in regulating liver disease:progress and outlook

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2024年第6期25卷 451-470页

作者： Tao CHEN shipeng LI Dewen DENG Weiye ZHANG Jianjun ZHANG Zhongyang SHEN First Central Clinical School Tianjin Medical UniversityTianjin 300192China Department of Organ Transplant Tianjin First Central HospitalTianjin 300192China Research Institute of Transplant Medicine Nankai UniversityTianjin 300192China Department of Hepatobiliary Surgery Henan Provincial People’s HospitalZhengzhou 450000China Key Laboratory of Organ Transplant Tianjin First Central HospitalTianjin 300192China

Interferon regulatory factor 1(IRF-1)is a member of the IRF *** is the first transcription factor to be identified that could bind to the interferon-stimulated response element(ISRE)on the target gene and displays crucial roles in the interferoninduced signals and ***-1,as an important medium,has all of the advantages of full cell cycle regulation,cell death signaling transduction,and reinforcing immune surveillance,which are well *** studies indicate that IRF-1 is of vital importance to the occurrence and evolution of multifarious liver diseases,including but not limited to inhibiting the replication of the hepatitis virus(A/B/C/E),alleviating the progression of liver fibrosis,and aggravating hepatic ischemiareperfusion injury(HIRI).The tumor suppression of IRF-1 is related to the clinical characteristics of liver cancer patients,which makes it a potential indicator for predicting the prognosis and recurrence of liver cancer;additionally,the latest studies have revealed other effects of IRF-1 such as protection against alcoholic/non-alcoholic fatty liver disease(AFLD/NAFLD),cholangiocarcinoma suppression,and uncommon traits in other liver diseases that had previously received little ***,several compounds and drugs have featured a protective function in specific liver disease models in which there is significant involvement of the IRF-1 *** this paper,we hope to propose a prospective research basis upon which to help decipher translational medicine applications of IRF-1 in liver disease treatment.

关键词： Interferon regulatory factor(IRF-1) Hepatitis virus Liver fibrosis Hepatic ischemia-reperfusion injury(HIRI) Liver cancer