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Photonics Research 2024年第1期12卷 141-153页

作者： YUAN WANG PEDRO TOVAR juntong yang LIANG CHEN XIAOYI BAO Nexus for Quantum Technologies University of OttawaOttawaOntario K1N 6N5Canada

A Brillouin dynamic grating(BDG) can be used for distributed birefringence measurement in optical fibers,offering high sensitivity and spatial resolution for sensing ***,it is quite a challenge to simultaneously achieve dynamic measurements with both high accuracy and high spatial *** this work,we propose a sensing mechanism to achieve distributed phase-matching measurement using a chirped pulse as a probe *** BDG reflection,the peak reflection corresponds to the highest four-wave mixing(FWM) conversion efficiency,and it requires the Brillouin frequency in the fast and slow axes to be equal,which is called the phase-matching *** condition changes at different fiber positions,which requires a range of frequency injection for the probe *** proposed method uses a chirped pulse as a probe wave to cover this frequency range associated with distributed birefringence *** allows us to detect distributed phase matching for birefringence changes that are introduced by temperature and strain *** to the single shot and direct time delay measurement capability,the acquisition rate in our system is only limited by the fiber ***,unlike conventional BDG spectrum recovery-based systems,the spatial resolution here is determined by both the frequency chirping rate of the probe pulse and the birefringence profile of the *** the experiments,an acquisition rate of 1 k Hz(up to fiber length limits) and a spatial resolution of 10 cm using a 20 ns probe pulse width are *** minimum detectable temperature and strain variation are 5.6 mK and 0.37 με along a 2 km long polarization-maintaining fiber(PMF).

关键词： fiber scattering polarization

超深井矿山压力分布与支护技术仿真研究——以中国五矿陈台沟铁矿为例

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新疆钢铁 2024年第2期 107-109页

作者：杨峻同中国矿业大学江苏徐州211116

超深井矿山的安全开采一直是矿业工程领域的重要课题。本文以中国五矿陈台沟铁矿为例,运用仿真技术对超深井矿山的压力分布与支护技术展开研究。通过对地质条件、开采方式和支护结构等因素进行综合分析,建立超深井矿山地压分布的数值模... 详细信息

超深井矿山的安全开采一直是矿业工程领域的重要课题。本文以中国五矿陈台沟铁矿为例,运用仿真技术对超深井矿山的压力分布与支护技术展开研究。通过对地质条件、开采方式和支护结构等因素进行综合分析,建立超深井矿山地压分布的数值模型,并模拟不同开采阶段的地压变化过程。通过仿真模拟评估其效果。结果显示,合理选择支护结构和优化支护参数可以有效提高矿山的支护效果和安全性。此外,还对超深井矿山地压形成机制进行了深入探讨,为支护技术的进一步优化提供了理论依据。

关键词：超深井矿山压力分布支护技术仿真

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城镇燃气管道低温工况下材料选用分析

城市燃气 2024年第5期 20-24页

作者：李学孔崔丽君杨俊童韩旭北京市煤气热力工程设计院有限公司北京市燃气集团有限责任公司

为了研究低温工况下城镇燃气管道的材料选用问题,本文分析了架空管道、调压、放散、排污等几种典型工况,提出了确定最低设计温度的方法。低温工况材料选用时,其最低使用温度和冲击功试验温度不应高于最低设计温度,并需要对材料提出冲击... 详细信息

为了研究低温工况下城镇燃气管道的材料选用问题,本文分析了架空管道、调压、放散、排污等几种典型工况,提出了确定最低设计温度的方法。低温工况材料选用时,其最低使用温度和冲击功试验温度不应高于最低设计温度,并需要对材料提出冲击韧性要求。研究结果提示可以通过适当增加壁厚使管道处于低温低应力工况而降低材料要求。

关键词：城镇燃气最低设计温度低温工况材料选用

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郭庄煤矿条带工作面充填开采工艺设计

能源科技 2024年第3期22卷 24-26,31页

作者：白卓阳陆银龙杨峻同崔晟赫朱龙中国矿业大学江苏徐州221116

为缓解采掘衔接紧张、延长矿井服务年限,郭庄煤矿计划利用膏体充填采煤法对“三下”压煤进行开采。在郭庄煤矿CT1101工作面现有地质条件和采区巷道布置的前提下,设计了条带工作面充填开采工艺流程,包括开采顺序设计、开采阶段设计和充... 详细信息

为缓解采掘衔接紧张、延长矿井服务年限,郭庄煤矿计划利用膏体充填采煤法对“三下”压煤进行开采。在郭庄煤矿CT1101工作面现有地质条件和采区巷道布置的前提下,设计了条带工作面充填开采工艺流程,包括开采顺序设计、开采阶段设计和充填阶段设计,为充填工艺实施提供了技术支持。

关键词：条带工作面充填采煤法巷道布置

A facile strategy for large-scale production of 2D nanosheets exfoliated by three-roll milling

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Journal of Advanced Ceramics 2024年第1期13卷 11-18页

作者： Xin Wang yang Xia juntong Huang Yao Su Zhi Chen Linlin Chen Zhaohui Wu Zhijun Feng Huiyong yang Xibao Li School of Materials Science and Engineering Nanchang Hangkong UniversityNanchang 330063China

Two-dimensional(2D)nanomaterials,such as graphene,MoS_(2),and MAX,have attracted increasing research attention in recent years due to their unique structural and performance ***,their complex production processes and equipment requirements are significant issues affecting their widespread ***,with an exfoliation strategy using three-roll milling,we present a simple,cost-effective,and extensible method to produce multilayer graphene,BN,MoS_(2),and Ti_(3)AlC_(2) *** roller and phenolic resin created three kinds of forces on the layered 2D materials,i.e.,shear forces,compressive forces,and adhesive forces,which exfoliated layered materials from their edges and surfaces into ***,the exfoliated materials were ultrasonically washed with alcohol,treated with ultrasonic vibration,and centrifuged to obtain 2D *** easy operation and high yield are attractive for research based on the construction of high-performance 2D nanosheet-based devices at low ***,the obtained multilayer graphene and MoS_(2) nanosheets were used as anode materials of sodium/potassium-ion batteries,respectively,to test their electrochemical *** performances are obtained compared with their primary bulk materials.

关键词： two-dimensional(2D)nanosheets exfoliation three-roll milling(TRM) sodium/potassium-ion batteries

Photoelectrocatalytic hydrogen evolution and synchronous degradation of organic pollutants by pg-C_(3)N_(4)/β-FeOOH S-scheme heterojunction

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Science China(Technological Sciences) 2024年第4期67卷 1238-1252页

作者： LI XiBao HAN Tao ZHOU YingTang XIE Yu LUO YiDan HUANG juntong CHEN Zhi DENG Fang School of Materials Science and Engineering Nanchang Hangkong UniversityNanchang 330063China National-Local Joint Engineering Research Center of Heavy Metal Pollutants Control and Resource Utilization Nanchang Hangkong UniversityNanchang 330063China Zhejiang Key Laboratory of Petrochemical Environmental Pollution Control National Engineering Research Center for Marine AquacultureMarine Science and Technology CollegeZhejiang Ocean UniversityZhoushan 316022China

Crafting photoelectrocatalytic materials with robust oxidation-reduction properties for simultaneous hydrogen evolution and pollutant degradation poses a formidable *** this study,a pg-C_(3)N_(4)/β-FeOOH S-scheme heterostructure with a special energy band structure was developed by anchoring porous pg-C_(3)N_(4)on needle shapedβ-*** as a hole extraction layer,needle-leaf-likeβ-FeOOH can facilitate efficient hole migration and enhance charge ***,the optimized 0.2-pg-C_(3)N_(4)/β-FeOOH could degrade 78%of ofloxacin(OFLO)in 90 *** organic pollutants could absorb a large number of holes,which prompted a greater proportion of photogenerated electrons to actively participate in the hydrogen evolution reaction at the ***,the hydrogen production of 0.2-pg-C_(3)N_(4)/β-FeOOH reached 1452.88μmol cm^(-2)h^(-1),exhibiting a notable increase of 61.81-165.12μmol cm^(-2)h^(-1)compared with that in the absence of *** and theoretical calculation results underscore that this investigation is grounded in a distinctive electron and hole dual channel transfer *** findings offer novel insights for the future development of S-scheme heterojunction photoelectrocatalytic materials capable of concurrently degrading pollutants and promoting hydrogen evolution.

关键词： photoelectrocatalysis hydrogen evolution degradation synchronous S-scheme heterojunction

Corrigendum to“3Cpro of FMDV inhibits type II interferon-stimulated JAK-STAT signaling pathway by blocking STAT1 nuclear translocation”[Virol Sin 38(2023)387–397]

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Virologica Sinica 2024年第2期39卷 351-354页

作者： Xiangju Wu Lei Chen Chao Sui Yue Hu Dandan Jiang Fan yang Laura C.Miller juntong Li Xiaoyan Cong Nataliia Hrabchenko Changhee Lee Yijun Du Jing Qi Shandong Key Laboratory of Animal Disease Control and Breeding Key Laboratory of Livestock and Poultry Multi-omics of MARAInstitute of Animal Science and Veterinary MedicineInstitute of Crop Germplasm ResourcesShandong Academy of Agricultural SciencesJinan250100China College of Life Science Shandong Normal UniversityJinan250358China State Key Laboratory of Veterinary Etiological Biology National Foot and Mouth Disease Reference LaboratoryKey Laboratory of Animal Virology of Ministry of AgricultureLanzhou Veterinary Research InstituteChinese Academy of Agricultural SciencesLanzhou730050China Department of Diagnostic Medicine and Pathobiology College of Veterinary MedicineKansas State UniversityManhattanKS66506USA College of Veterinary Medicine and Virus Vaccine Research Center Gyeongsang National UniversityJinju52828Republic of Korea

Due to our negligence,the original version of this article,published online on Mar 14,2023,contained some mistakes in several *** Fig.2D,the positions of the bands for protein 3A and 3B were incorrectly *** has been m... 详细信息

关键词： STAT1 FMDV bands

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超超临界机组一次调频控制策略的优化

热力发电 2013年第5期42卷 83-85,89页

作者：杨军统吴泽刚安徽省电力科学研究院安徽合肥230601 安徽池州九华发电有限公司安徽宣城241300

针对原机组的一次调频控制策略,设计了基于数字式电液控制系统(DEH)的一次调频控制策略,采用电网频率取代汽轮机转速参与一次调频控制;利用DEH扫描周期速度快的特点,在DEH中组态一次调频功率控制、一次调频阀位控制值设定和机组协调控制... 详细信息

针对原机组的一次调频控制策略,设计了基于数字式电液控制系统(DEH)的一次调频控制策略,采用电网频率取代汽轮机转速参与一次调频控制;利用DEH扫描周期速度快的特点,在DEH中组态一次调频功率控制、一次调频阀位控制值设定和机组协调控制(UCC)的一次调频功率控制等逻辑;在UCC组态中一次调频功率控制逻辑,直接从DEH向UCC传输调频功率,以便快速获得电网频率偏差值,从而快速调频;根据超临界机组直流锅炉蓄热小的特点,将调频功率加入锅炉负荷指令的静、动态前馈控制中,以保证一次调频的快速性、有效性、安全性以及长期稳定性。

关键词：超超临界机组 DEH 一次调频 UCC 汽轮机转速电网频率

Pleistocene glaciation advances the cryptic speciation of Stellera chamaejasme *** a major biodiversity hotspot

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Journal of Integrative Plant Biology 2024年第6期66卷 1192-1205页

作者： Santosh Kumar Rana Hum Kala Rana Jacob BLandis Tianhui Kuang juntong Chen Hengchang Wang Tao Deng Charles C.Davis Hang Sun CAS Key Laboratory for Plant Diversity and Biogeography of East Asia Kunming Institute of BotanyChinese Academy of SciencesKunming 650201China Arkansas Biosciences Institute Arkansas State UniversityJonesboroArkansas 72401USA School of Integrative Plant Science Section of Plant Biology and the L.H.Bailey HortoriumCornell UniversityIthacaNew York 14853USA BTI Computational Biology Center Boyce Thompson InstituteIthacaNew York 14853USA CAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture Chinese Academy of SciencesWuhan Botanical GardenWuhan 430074China Department of Organismic and Evolutionary Biology HerbariaHarvard UniversityCambridgeMassachusetts 02138USA

The mountains of Southwest China comprise a significant large mountain range and biodiversity hotspot imperiled by global climate *** high species diversity in this mountain system has long been attributed to a complex set of factors,and recent large-scale macroevolutionary investigations have placed a broad timeline on plant diversification that stretches from 10 million years ago(Mya)to the *** our increasing understanding of the temporal mode of speciation,finer-scale populationlevel investigations are lacking to better refine these temporal trends and illuminate the abiotic and biotic influences of cryptic *** is largely due to the dearth of organismal sampling among closely related species and populations,spanning the incredible size and topological heterogeneity of this *** study dives into these evolutionary dynamics of speciation using genomic and ecomorphological data of Stellera chamaejasme *** identified four previously unrecognized cryptic species having indistinct morphological traits and large metapopulation of evolving lineages,suggesting a more recent diversification(~2.67-0.90 Mya),largely influenced by Pleistocene glaciation and biotic *** factors likely influenced allopatric speciation and advocated cyclical warming–cooling episodes along elevational gradients during the *** study refines the evolutionary timeline to be much younger than previously implicated and raises the concern that projected future warming may influence the alpine species diversity,necessitating increased conservation efforts.

关键词： cryptic speciation glacial-interglacial Hengduan Mountains north-south migration Stellera chamaejasme

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三自智能调节器在干法脱硫中的应用

自动化仪表 2018年第11期39卷 83-86,90页

作者：杨军统国网安徽省电力有限公司电力科学研究院安徽合肥230601

针对大迟延、大惯性特性的控制对象,采用常规调节器达不到理想的控制效果。采用原调节器的测量值、设定值构建一个辅助调节器,并由辅助调节器与原调节器组合成三自智能调节器。该智能调节器具有自纠缠、自平衡、自(动)寻优功能。辅助调... 详细信息

针对大迟延、大惯性特性的控制对象,采用常规调节器达不到理想的控制效果。采用原调节器的测量值、设定值构建一个辅助调节器,并由辅助调节器与原调节器组合成三自智能调节器。该智能调节器具有自纠缠、自平衡、自(动)寻优功能。辅助调节器由比例、积分、微分环节构成。主调节器测量值经乘法系数修正作为辅助调节器的测量值,主调节器设定值经乘法修正作为辅助调节器的设定值。辅助调节器的测量值与辅助调节器的设定值的偏差经辅助调节器的比例作用构成辅助调节器的比例环节;主调节器的测量值经过三阶惯性环节,作为辅助调节器的积分环节的设定值,该值与测量值的偏差经过辅助调节器的积分作用构成辅助调节器的积分环节;辅助调节器的测量值与辅助辅助调节器的设定值的偏差,用三阶惯性环节搭建,构成辅助调节器三阶次微分环节。实践证明,三自智能调节器既解决了循环流化床干法脱硫超低排放的自动控制问题,又解决了火力发电机组负荷、温度、压力的解耦问题,具有推广应用价值。

关键词：自平衡自动寻优辅助调节器智能调节器火力发电机组