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Microstructure and properties of LZQT600-3 HCCDIBs for plunger pump cylinder

China Foundry 2024年第2期21卷 197-204页

作者： Chun-jie Xu Yuan-ying Jin Dong ma Zhen Zhao Jia-wei Qi Shang sui Xiang-quan Wu Can Guo Zhong-ming Zhang Yong-hui Liu Dan Shechtman School of materials Science and Engineering Xi'an University of TechnologyXi'an 710048China Xi'an Shechtman Nobel Prize New materials Institute Xi'an 710048China Tongchuan Huazhu Precision Technology Co. Ltd.Tongchuan 727100ShaanxiChina Faculty of materials Science and Engineering Technion-Israel Insititue of TechnologyHaifa 3200003Israel

It is important to improve the comprehensive performance of the ductile iron bars(DIBs)for the cylinder block of the extra high pressure hydraulic plunger pump and accelerate the industrial *** this work,the LZQT600-3 DIBs with the diameter of 145 mm were prepared by the horizontal continuous casting(HCC)process,that is,LZQT600-3 *** microstructure and room temperature tensile properties of different sections[left-edge(surface layer),left-1/2R(left half of the radius),and the center of the HCCDIBs]were *** results show that the spheroidization of LZQT600-3 HCCDIBs matrix from the left-edge,left-1/2R to the center is at nodulizing grade II and *** the cooling rate gradually decreases from surface to the center of the HCCIBs,the number of spheroidized graphite is gradually reduced,the size is gradually increased,the shape factor is decreased,and the pearlite content and lamellate spacing are *** the horizontal direction of the section,the hardness of the material is distributed symmetrically around the center of the *** the vertical direction,the hardness distribution in the center of the HCCDIBs is asymmetrical due to the gravity during the solidification ***,the microstructure in the lower part of the section solidifies relatively *** left-edge has the best tensile mechanical properties,and the ultimate tensile strength,yield tensile strength and elongation are 597.3 MPa,418.5 MPa and 9.6%,*** tensile fracture belongs to the ductile-brittle hybrid *** comprehensive performances of LZQT600-3 HCCDIBs meet the actual application requirements of ultra-high pressure hydraulic plunger pump cylinder.

关键词： horizontal continuous casting(HCC) nodular cast iron ductile iron bars microstructure mechanical properties

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Detecting Double Mixed Compressed Images Based on Quaternion Convolutional Neural Network

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Chinese Journal of Electronics 2024年第3期33卷 657-671页

作者： Hao WANG Jinwei WANG Xuelong HU bingtao HU Qilin YIN Xiangyang LUO bin ma Jinsheng SUN Department of Automation Nanjing University of Science and Technology Engineering Research Center of Digital Forensics Ministry of Education Department of Computer and Software Nanjing University of Information Science and Technology School of management Nanjing University of Posts and Telecommunications Department of Computer Science and Engineering Guangdong Province Key Laboratory of Information Security Technology Sun Yat-sen University State Key Laboratory of mathematical Engineering and Advanced Computing Qilu University of Technology

Detection of color images that have undergone double compression is a critical aspect of digital image *** the existence of various methods capable of detecting double Joint Photographic Experts Group(JPEG) compression,they are unable to address the issue of mixed double compression resulting from the use of different compression *** particular,the implementation of Joint Photographic Experts Group 2000(JPEG2000)as the secondary compression standard can result in a decline or complete loss of performance in existing *** tackle this challenge of JPEG+JPEG2000 compression,a detection method based on quaternion convolutional neural networks(QCNN) is *** QCNN processes the data as a quaternion,transforming the components of a traditional convolutional neural network(CNN) into a quaternion *** relationships between the color channels of the image are preserved,and the utilization of color information is ***,the method includes a feature conversion module that converts the extracted features into quaternion statistical features,thereby amplifying the evidence of double *** results indicate that the proposed QCNN-based method improves,on average,by 27% compared to existing methods in the detection of JPEG+JPEG2000 compression.

关键词： Image coding Image color analysis Quaternions Forensics Transform coding Color Feature extraction

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Early warning of core network capacity in space-terrestrial integrated networks

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Journal of Systems Engineering and Electronics 2024年第4期35卷 855-864页

作者： HAN Sai LI Ao ZHANG Dongyue ZHU bin WANG Zelin WANG Guangquan MIAO Jie ma Hongbing China Unicom Research Institute Beijing 100044China China United Network Communications Group Company Limited Beijing 100033China

With the rapid development of low-orbit satellite com-munication networks both domestically and internationally,space-terrestrial integrated networks will become the future development *** space and terrestrial networks with limi-ted resources,the utilization efficiency of the entire space-terres-trial integrated networks resources can be affected by the core network *** order to improve the response efficiency of core networks expansion construction,early warning of the core network elements capacity is *** on the inte-grated architecture of space and terrestrial network,multidimen-sional factors are considered in this paper,including the number of terminals,login users,and the rules of users’migration during *** artifical intelligence(AI)technologies,the regis-tered users of the access and mobility management function(AMF),authorization users of the unified data management(UDM),protocol data unit(PDU)sessions of session manage-ment function(SMF)are predicted in combination with the num-ber of login users,the number of ***,the core network elements capacity can be predicted in *** proposed method is proven to be effective based on the data from real network.

关键词： space-terrestrial integrated networks core network element capacity artificial intelligent(AI)

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Optical responses of metallic plasmonic arrays under the localized excitation

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Nano Research 2024年第3期17卷 1571-1577页

作者： Sen Yan Hao ma Yi-Fan Bao maofeng Cao Chuan Liu Kaifeng Zhang Xiaowei Wu Jianbo He Xiang Wang bin Ren State Key Laboratory of Physical Chemistry of Solid Surfaces Department of ChemistryCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China Innovation Laboratory for Sciences and Technologies of Energy materials of Fujian Province(IKKEM) Xiamen 361005China Research&Development Group HitachiLtd.Yokohama 244-0817KanagawaJapan Department of Electronic Science and Engineering Kyoto UniversityKyoto 615-8510Japan

The metallic plasmonic array that can support both propagating surface plasmon polaritons(PSPPs)and localized surface plasmon resonance(LSPR)possesses rich optical properties and remarkable optical performance,making it a powerful platform for applications in photonics,chemistry,and *** practical applications,the excitation spot is usually smaller than the area of metal *** is thus imperative to address“how many array units are enough?”towards a rational design of plasmonic ***,we employed focused ion beam(FIB)to precisely fabricate a series of plasmonic array structures with increased unit *** utilizing photoluminescence(PL)and surface-enhanced Raman spectroscopy(SERS),we found that the array units outside the excitation spot still have a significant impact on the optical response within the *** with the numerical simulation,we found that the boundary of the finite array leads to the loss of PSPP outside the excitation point,which subsequently affects the coupling of PSPP and LSPR in the excitation spot,leading to variations in PL and SERS *** on the findings,we further tuned the LSPR mode of the metal arrays by electrodeposition to obtain strong near-field enhancement without any influence on the PSPP *** work advances the understanding of near-field and far-field optical behavior in finite-size array structures and provides guidance for designing highly-efficient photonic devices.

关键词： plasmonic periodic array finite-size effects dark field scattering surface-enhanced Raman spectroscopy(SERS)

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Hierarchically Structured Nb_(2)O_5 Microflowers with Enhanced Capacity and Fast-Charging Capability for Flexible Planar Sodium Ion Micro-Supercapacitors

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Nano-Micro Letters 2024年第4期16卷 97-109页

作者： Jiaxin ma Jieqiong Qin Shuanghao Zheng Yinghua Fu Liping Chi Yaguang Li Cong Dong bin Li Feifei Xing Haodong Shi Zhong‑Shuai Wu State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of Sciences457 Zhongshan RoadDalian 116023People’s Republic of China School of materials Science and Engineering Zhengzhou UniversityZhengzhou 450001People’s Republic of China College of Science Henan Agricultural UniversityNo.63 Agricultural RoadZhengzhou 450002People’s Republic of China Dalian National Laboratory for Clean Energy Chinese Academy of Sciences457 Zhongshan RoadDalian 116023People’s Republic of China University of Chinese Academy of Sciences 19A Yuquan RoadShijingshan DistrictBeijing 100049People’s Republic of China Hebei Key Lab of Optic‑Electronic Information and materials The College of Physics Science and TechnologyInstitute of Life Science and Green DevelopmentHebei UniversityBaoding 071002People’s Republic of China

Planar Na ion micro-supercapacitors(NIMSCs) that offer both high energy density and power density are deemed to a promising class of miniaturized power sources for wearable and portable microelectron-ics. Nevertheless, the development of NIMSCs are hugely impeded by the low capacity and sluggish Na ion kinetics in the negative ***, we demonstrate a novel carbon-coated Nb_(2)O_5 microflower with a hierarchical structure composed of vertically intercrossed and porous nanosheets, boosting Na ion storage performance. The unique structural merits, including uniform carbon coating, ultrathin nanosheets and abun-dant pores, endow the Nb_(2)O_5 microflower with highly reversible Na ion storage capacity of 245 mah g^(-1) at 0.25 C and excellent rate *** from high capacity and fast charging of Nb_(2)O_5 microflower, the planar NIMSCs consisted of Nb_(2)O_5 negative electrode and activated car-bon positive electrode deliver high areal energy density of 60.7 μWh cm^(-2),considerable voltage window of 3.5 V and extraordinary cyclability. Therefore, this work exploits a structural design strategy towards electrode materials for application in NIMSCs, holding great promise for flexible microelectronics.

关键词： Nb_(2)O_5 nanosheets Microflowers Sodium ion micro-supercapacitors Flexibility Energy storage

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Analysis and Monitoring of Indoor Radon Concentrations of 37 Kindergartens — Beijing Municipality, China, 2023

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China CDC weekly 2024年第13期6卷 272-276页

作者： Meinan Yao Kuke Ding Xiaozhe Tang Yunyun Wu Yanchao Song Shuyuan Liu bin Bai Li Zhang Yongzhong ma Institute for Radiation Hygiene Protection Beijing Center for Disease Prevention and ControlBeijingChina Chinese Center for Disease Control and Prevention BeijingChina Key Laboratory of Radiological Protection and Nuclear Emergency&National Institute for Radiological Protection Chinese Center for Disease Control and PreventionBeijingChina

Introduction:Radon(222Rn or 222radon)is a radioactive gas emitted from building materials,foundations,and *** are especially susceptible to radon exposure,underscoring the need to assess indoor radon levels in *** study monitored radon concentrations in 37 Beijing kindergartens from June to October ***:A random sample of 37 kindergartens was selected from 18 administrative districts in *** indoor radon concentration was measured using the solid track accumulation method,with radon detectors continuously monitored over a 3-month ***:The mean indoor radon level in 37 kindergartens,observed at 252 monitoring points,was 84.3 Bq/m^(3),with values varying from 12.9 to 263.5 Bq/m^(3).About 20.2%of points showed radon levels between 100.0 and 200.0 Bq/m^(3),while 2.4%exceeded 200.0 Bq/m^(3).Notably,radon levels were significantly elevated on the ground floor compared to the upper ***:Indoor radon levels in 37 kindergartens remained below the national standard limit of 300.0 Bq/m^(3) for buildings(GB/T 16146-2015).Nonetheless,18.9%of the kindergartens exceeded the 100.0 Bq/m^(3) limit set for new *** is advised to improve radon monitoring in kindergartens and consider developing a national standard for maximum permissible radon levels in such facilities.

关键词： Radon limit floor

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A novel responsive stabilizing Janus nanosilica as a nanoplugging agent in water-based drilling fluids for exploiting hostile shale environments

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Petroleum Science 2024年第2期21卷 1190-1210页

作者： Alain Pierre Tchameni Lv-Yan Zhuo Lesly Dasilva Wandji Djouonkep Robert Dery Nagre Lu-Xin Chen Lin Zhao Chao ma bin-Qiang Xie College of Petroleum Engineering Yangtze UniversityWuhan430100HubeiChina Key Laboratory of Drilling and Production Engineering for Oil and Gas HubeiChina Lost Circulation Control Laboratory National Engineering Laboratory for Petroleum Drilling EngineeringYangtze UniversityWuhan430100HubeiChina College of Petroleum Engineering Shandong Institute of Petroleum and Chemical TechnologyDongying257061ShandongChina Petroleum Engineer Research Institute of Petrochina Dagang Oilfield Tianjin300280China Department of Chemical Engineering Kumasi Technical UniversityP.O.Box 854KumasiGhana

Thermo-responsive nanocomposites have recently emerged as potential nanoplugging agents for shale stabilization in high-temperature water-based drilling fluids(WBDFs). However, their inhibitory properties have not been very effective in high-temperature drilling operations. Thermo-responsive Janus nanocomposites are expected to strongly interact with clay particles from the inward hemisphere of nanomaterials, which drive the establishment of a tighter hydrophobic membrane over the shale surface at the outward hemisphere under geothermal conditions for shale stabilization. This work combines the synergistic benefits of thermo-responsive and zwitterionic nanomaterials to synchronously enhance the chemical inhibitions and plugging performances in shale under harsh conditions. A novel thermoresponsive Janus nanosilica(TRJS) exhibiting zwitterionic character was synthesized, characterized,and assessed as shale stabilizer for WBDFs at high temperatures. Compared to pristine nanosilica(Si NP)and symmetrical thermo-responsive nanosilica(TRS), TRJS exhibited anti-polyelectrolyte behaviour, in which electrolyte ions screened the electrostatic attraction between the charged particles, potentially stabilizing nanomaterial in hostile shaly environments(i.e., up to saturated brine or API brine). macroscopically, TRJS exhibited higher chemical inhibition than Si NP and TRS in brine, prompting a better capability to control pressure penetration. TRJS adsorbed onto the clay surface via chemisorption and hydrogen bonding, and the interactions became substantial in brine, according to the results of electrophoretic mobility, surface wettability, and X-ray diffraction. Thus, contributing to the firm trapping of TRJS into the nanopore structure of the shale, triggering the formation of a tight hydrophobic membrane over the shale surface from the outward hemisphere. The addition of TRJS into WBDF had no deleterious effect on fluid properties after hot-treatment at 190℃, implying that TRJ

关键词： Janus nanosilica Thermo-responsive copolymer Anti-polyelectrolyte effect Shale stabilizer Inhibition Plugging Drilling fluid

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Single-nucleus transcriptomics uncovers a geroprotective role of YAP in primate gingival aging

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Protein & Cell 2024年第8期15卷 612-632页

作者： Qinchao Hu bin Zhang Yaobin Jing Shuai ma Lei Hu jingyi Li Yandong Zheng Zijuan Xin Jianmin Peng Si Wang bin Cheng Jing Qu Weiqi zhang Guang-Hui Liu Songlin Wang State Key Laboratory of Membrane Biology Institute of ZoologyChinese Academy of SciencesBeijing 100101China Hospital of Stomatology Guanghua School of StomatologyGuangdong Provincial Key Laboratory of StomatologySun Yat-sen UniversityGuangzhou 510060China Salivary Gland Disease Center and Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction Beijing Laboratory of Oral Health and Beijing Stomatological HospitalCapital Medical UniversityBeijing 100050China Department of Biochemistry and Molecular Biology School of Basic Medical SciencesCapital Medical UniversityBeijing 100069China CAS Key Laboratory of Genomic and Precision Medicine Beijing Institute of GenomicsChinese Academy of Sciences and China National Center for BioinformationBeijing 100101China State Key Laboratory of Stem Cell and Reproductive Biology Institute of ZoologyChinese Academy of SciencesBeijing 100101China Key Laboratory of Organ Regeneration and Reconstruction Institute of ZoologyChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China Institute for Stem Cell and Regeneration Chinese Academy of SciencesBeijing 100101China Beijing Institute for Stem Cell and Regenerative Medicine Beijing 100101China Advanced Innovation Center for Human Brain Protection and National Clinical Research Center for Geriatric Disorders Xuanwu Hospital Capital Medical UniversityBeijing 100053China Aging Translational Medicine Center Intermational Center for Aging and CancerBeijing Municipal Geriatric Medical Research CenterXuan Wu HospitalCapital Medical UniversityBeijing 100053China Intemational Center for Aging and Cancer Hainan Medical UniversityHaikou 571199China Aging Biomarker Consortium Beijing 100101China

Aging has a profound impact on the gingiva and significantly increases its susceptibility to periodontitis,a worldwide prevalent inflammatory ***,a systematic characterization and comprehensive understanding of the regulatory mechanism underlying gingival aging is still ***,we systematically dissected the phenotypic characteristics of gingiva during aging in primates and constructed the first single-nucleus transcriptomic landscape of gingival aging,by which a panel of cell type-specific signatures were *** cells were identified as the most affected cell types by aging in the *** analyses pinpointed the crucial role of YAP in epithelial self-renew and homeostasis,which declined during aging in epithelial cells,especially in basal *** decline of YAP activity during aging was confrmed in the human gingival tissues,and downregulation of YAP in human primary gingival keratinocytes recapitulated the major phenotypic defects observed in the aged primate gingiva while overexpression of YAP showed rejuvenation *** work provides an in-depth understanding of gingival aging and serves as a rich resource for developing novel strategies to combat aging-associated gingival diseases,with the ultimate goal of advancing periodontal health and promoting healthy aging.

关键词： single-nucleus RNA-sequencing primate gingiva aging YAP

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Developmental phenotypes of rat cold pain behavioral responses evoked by TRP channel-related temperature

Developmental phenotypes of rat cold pain behavioral respons...

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中国神经科学学会第十届全国学术会议

作者： Zhan-Tao Bai Xia Liu Zhi-Hong Sun Qing-Hu Yang sui-bin ma Jia Li Song-Yu Tian Reng-Hao Hou Jiang-Bo Wang College of Life Sciences Yanan University Shaanxi Engineering & Technological Research Center for Conversation & Utilization of Regional Biological Resources Shaanxi Provincial Key Lab of Red Dates

Objective Temperature sensation is an important vital *** receptor potential（TRP） channels,such as TRPM5 and TRPA1,respond for cold temperature under physiological and pathological ***,rat behavioral responses and molecule mechanism of TRP channel participating in clod pain sensation,especially during development,are still far from *** The rats from neonatal to adult（1-9 weeks,postnatal） were ***-34 cold-heat pain detector was used to investigate rat behavioral latency and responses number and duration,which were regarded as heat pain *** constant or continuous dynamic TRPM5 and TRPA1-related temperature（5 ℃ to 37 ℃） were used as stimuli to rat *** From neonatal to adult,rat behaviors including paw flinching,moving,head scratching,body shaking and paw licking were distinctly evoked by cold *** tolerance to cold temperature was *** the decrease of the constant temperature,rat behavioral latency was reduced *** Rat TRPM5 and TRPA1-related cold pain sensation demonstrates age *** would further us understanding the mechanisms of TRP-related heat pain and sound child rearing during development.

关键词： TRP channel TRPM8 TRPA1 cold pain development

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Developmental change of rat cold pain sensation induced by TRP channel-related temperature

Developmental change of rat cold pain sensation induced by T...

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中国神经科学学会第十届全国学术会议

作者： Xia Liu Zhi-Hong Sun Qing-Hu Yang sui-bin ma Jia Li Song-Yu Tian Reng-Hao Hou Jiang-Bo Wang Zhan-Tao Bai College of Life Sciences Yanan University Shaanxi Engineering & Technological Research Center for Conversation & Utilization of Regional Biological Resources Shaanxi Provincial Key Lab of Red Dates

Objective Living organisms can sense temperature changes in environmental and internal temperature by *** is confirmed that transient receptor potential（TRP） channels play an important role in mediating warm temperature sensation,including TRPV1,TRPV2,TRPV3 and TRPV4,which are concerned with warm ***,the phenotypes of rat behavioral responses and molecule mechanism of TRP channel participating in heat sensation,especially during development,are still under *** The rats from neonatal to adult（1-9 weeks,postnatal） were ***-34 cold-heat pain detector was used to investigate rat behavioral latency and responses number and duration,which were regarded as heat pain *** constant or continuous dynamic TRPV channels-related temperature（34 ℃,38 ℃,40 ℃,43 ℃,44 ℃,46 ℃,48 ℃,51 ℃,52 ℃ and 53 ℃） were used as stimuli to rat *** With heat stimuli,kind of rat behaviors such as paw flinching,face grooming,paw licking,body scratching,head shaking etc.,were evoked,and rat behavioral responses stimulated by different temperature were distinct *** development,rat tolerance to heat temperature was *** the increase of the constant temperature,and with warming up dynamic rate of progressive temperature,rat behaviors were induced more *** Rat TRPV channels-related heat detection demonstrates age and temperature *** would provide some support to help us to understand the mechanisms of TRPV-related heat pain and sound child rearing.

关键词： TRP channel TRPV heat pain development

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