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High-efficiency Carbonation Modification Methods of Recycled Coarse Aggregates

Journal of Wuhan University of Technology(Materials Science) 2024年第2期39卷 386-398页

作者：张美香 YANG xiaolin 丁亚红 SUN Bo ZHANG Xianggang LÜXiuwen Department of Civil Engineering Henan Polytechnic UniversityJiaozuo 454150China College of Architectural Engineering Xinyu UniversityXinyu 336500China

To solve the problem of only surface carbonation and realize high-efficiency carbonation of recycled coarse aggregate,the method of carbonated recycled coarse aggregate with nano materials pre-soaking was first put *** carbonation effect of modified recycled coarse aggregate with three different carbonation methods was evaluated,and water absorption,apparent density and crush index of modified recycled coarse aggregate were *** with XRD,SEM,and MIP microscopic analysis,the high-efficiency carbonation strengthening mechanism of modified recycled coarse aggregate was *** experimental results show that,compared with the non-carbonated recycled coarse aggregate,the physical and microscopic properties of carbonated recycled coarse aggregate are *** method of carbonation with nano-SiO_(2) pre-soaking can realize the high-efficiency carbonation of recycled coarse aggregate,for modified recycled coarse aggregate with the method,water absorption is reduced by 23.03%,porosity is reduced by 44.06%,and the average pore diameter is 21.82 *** high-efficiency carbonation strengthening mechanism show that the pre-socked nano-SiO_(2) is bound to the hydration product Ca(OH)_(2) of the old mortar with nano-scale C-S-H,which can improve the CO_(2) absorption rate,accelerate the carbonation reaction,generate more stable CaCO_(3) and nano-scale silica gel,and bond to the dense three-dimensional network structure to realize the bidirectional enhancement of nano-materials and pressurized *** is concluded that the method of carbonation with nano-SiO_(2) pre-soaking is a novel high-efficiency carbonation modification of recycled coarse aggregate.

关键词： recycled coarse aggregate pressurized carbonation high-efficiency carbonation nano-SiO2 strengthening mechanism

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Multi-path navigation method using solar panel-reflected solar oscillations for Earth satellites

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Science China(Information Sciences) 2024年第7期67卷 327-328页

作者： Yuqing YANG Haonan YANG xiaolin NING Weiren WU Jiancheng FANG School of Instrument Science & Opto-electronics Engineering Beihang University lunar Exploration and Space Program Center China National Space Administration

Several autonomous navigation methods have been studied to reduce reliance on the ground stations. Geomagnetic navigation, gravity gradient navigation, and celestial navigation using optical sensors are typical autonomous navigation methods. Geomagnetic and gravity gradient navigation have low navigation accuracy (1301 m [1] and 235 m [2], respectively) due to the poor accuracy of the geomagnetic and gravity gradient maps.

关键词： Solar panels

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Structural features in the mid-southern section of the Kyushu–Palau Ridge based on satellite altimetry gravity anomaly

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Acta Oceanologica Sinica 2024年第4期43卷 50-60页

作者： Feifei Zhang Dingding Wang xiaolin Ji Fanghui Hou Yuan Yang Wanyin Wang School of Geological Engineering and Geomatics Chang’an UniversityXi’an 710054China Qingdao Institute of Marine Geology China Geological SurveyQingdao 266071China Information and Navigation College Air Force Engineering UniversityXi’an 710077China National Engineering Research Center of Offshore Oil and Gas Exploration Beijing 100028China Key Laboratory of Marine Geology and Environment Institute of OceanologyChinese Academy of SciencesQingdao 266071China

The Kyushu–Palau Ridge(KPR),an anti-S-shaped submarine highland at the center of the Philippine Sea Plate(PSP),is considered the residual arc of the Izu–Bonin–Mariana Island Arc,which retains key information about the cessation of the Western Philippine Basin(WPB)expansion and the Parece Vela Basin(PVB)***,using the new generation of satellite altimetry gravity data,high-precision seafloor topography data,and newly acquired ship-borne gravity data,the topographic and gravity characteristics of the KPR mid-southern section and adjacent region are *** distribution characteristics of the faults were delineated using the normalized vertical derivative–total horizontal derivative method(NVDR-THDR)and the minimum curvature potential field separation *** Moho depth and crustal thickness were inverted using the rapid inversion method for a double-interface model with depth *** on these results,the crust structure features in the KPR mid-southern section,and the“triangular”structure geological significance where the KPR and Central Basin Rift(CBR)of the WPB intersect are *** KPR crustal thickness is approximately 6–16 km,with a distinct discontinuity that is slightly thicker than the normal oceanic *** KPR mid-southern section crust structure was divided into four segments(S1–S4)from north to south,formed by the CBR eastward extension joint action and clockwise rotation of the PVB expansion axis and the Mindanao fault zone blocking effect.

关键词： structural features satellite altimetry gravity data Kyushu-Palau Ridge Central Basin Rift faults Moho depth

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Effect of unstable resonator stability on laser beam quality

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Optoelectronics Letters 2024年第9期20卷 523-530页

作者： LIANG xiaolin BAO Ben'gang ZHOU Songqing CHEN Huihuang College of Intelligent Manufacturing Hunan University of Science and EngineeringYongzhou 425199China

In order to explore the effect of unstable resonator stability on laser beam quality,the numerical simulation of midinfrared laser and visible laser was carried out in GLAD *** simulation results showed that the existence of defocus aberration,tilt aberration and astigmatic aberration in the unstable resonator can cause the center of the far-field spot of the output annular beam to drift,the number of peripheral diffraction rings to increase,the beam quality to deteriorate,and the degree of effect is different.

关键词： resonator laser beam

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Mechanism of Diabatic Heating on Precipitation and the Track of a Tibetan Plateau Vortex over the Eastern Slope of the Tibetan Plateau

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Advances in Atmospheric Sciences 2024年第1期41卷 155-172页

作者： Yuanchang DONG Guoping LI xiaolin XIE Long YANG Peiwen ZHANG Bo ZENG Institute of Plateau Meteorology China Meteorological Administration(CMA)/Heavy Rain and Drought-Flood Disaster in Plateau and Basin Key Laboratory of Sichuan ProvinceChengdu 610072China School of Atmospheric Sciences Chengdu University of Information TechnologyChengdu 610225China Meteorological Observation Data Center of Sichuan Province Chengdu 610072China Sichuan Branch of Meteorologist Training Institute CMAChengdu 610072China

Existing studies contend that latent heating(LH)will replace sensible heating(SH)to become the dominant factor affecting the development of the Tibetan Plateau vortex(TPV)after it moves off the Tibetan Plateau(TP).However,in the process of the TPV moving off the TP requires that the airmass traverse the eastern slope of the Tibetan Plateau(ESTP)where the topography and diabatic heating(DH)conditions rapidly *** LH gradually replaces SH to become the dominant factor in the development of the TPV over the ESTP is still not very *** this paper,an analysis of a typical case of a TPV with a long life history over the ESTP is performed by using multi-sourced meteorological data and model *** results show that SH from the TP surface can change the TPV-associated precipitation distribution by temperature advection after the TPV moves off the *** LH can then directly promote the development of the TPV and has a certain guiding effect on the track of the *** SH can control the active area of LH by changing the falling area of the TPV-associated precipitation,so it still plays a key role in the development and tracking of the TPV even though it has moved out of the main body of the TP.

关键词： eastern slope of the Tibetan Plateau diabatic heating Tibetan Plateau vortex precipitation distribution track

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Three-parameter approximations of sums of locally dependent random variables via Stein's method

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Science China Mathematics 2024年

作者： Zhonggen Su xiaolin Wang School of Mathematical Sciences Zhejiang University

Let,{Xi,i ∈ J} be a family of locally dependent non-negative integer-valued random variables with finite expectations and *** consider the sum W=∑i∈jXiand apply Stein's method to establish general upper error bounds for the total variation distance dTV（W,M）,where M represents a threeparameter random *** a direct consequence,we obtain a discretized normal approximation for *** applications,we study four well-known examples in detail:counting vertices where all edges point inward,the birthday problem,counting monochromatic edges in uniformly colored graphs,and triangles in the Erd?s-Renyi random *** delicate analysis and computation,we obtain sharper upper error bounds than existing results.

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Reinforcement Learning-Based Energy Management for Hybrid Power Systems:State-of-the-Art Survey,Review,and Perspectives

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Chinese Journal of Mechanical Engineering 2024年第3期37卷 1-25页

作者： xiaolin Tang Jiaxin Chen Yechen Qin Teng Liu Kai Yang Amir Khajepour Shen Li College of Mechanical and Vehicle Engineering Chongqing UniversityChongqing 400044China School of Mechanical Engineering Beijing Institute of TechnologyBeijing 100081China Department of Mechanical and Mechatronics Engineering University of WaterlooWaterlooON N2L 3G1Canada School of Civil Engineering Tsinghua UniversityBeijing 100084China

The new energy vehicle plays a crucial role in green transportation,and the energy management strategy of hybrid power systems is essential for ensuring energy-efficient *** paper presents a state-of-the-art survey and review of reinforcement learning-based energy management strategies for hybrid power ***,it envisions the outlook for autonomous intelligent hybrid electric vehicles,with reinforcement learning as the foundational *** of all,to provide a macro view of historical development,the brief history of deep learning,reinforcement learning,and deep reinforcement learning is presented in the form of a ***,the comprehensive survey and review are conducted by collecting papers from mainstream academic *** most of the contributions based on three main directions—algorithm innovation,powertrain innovation,and environment innovation—provides an objective review of the research ***,to advance the application of reinforcement learning in autonomous intelligent hybrid electric vehicles,future research plans positioned as“Alpha HEV”are envisioned,integrating Autopilot and energy-saving control.

关键词： New energy vehicle Hybrid power system Reinforcement learning Energy management strategy

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Design and Implementation of Remote PSTN-Based Data Acquisition System

Design and Implementation of Remote PSTN-Based Data Acquisit...

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2010 International Conference on Advanced Measurement and Test (AMT 2010)

作者： xiaolin lu College of Information and Electronic Engineering,Zhejiang University of Science and Technology,Hangzhou,China,310012

The Data Acquisition Systems(DAS)are the basis for building monitoring tools that enable the supervision of local and remote systems.A variety of communications and data transmission system has been adopted DAS to exchange *** special-purpose DAS has a very important practical *** paper presents the circuit and system design for a new micro type of remote data acquisition *** consists of an integrated circuit,a phone dialer,modulation devices,central processing unit,buttons,input devices and display *** system and circuit design has been described in *** can be used to transmit data through the public switched telephone *** is suitable for constructing a mini scale communication network at low cost for data acquisition through the PSTN.

关键词： Distance data acquisition system,PSTN,circuit design.

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Discovery of a pterodactylid pterosaur from the Yixian Formation of western Liaoning,China

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Chinese Science Bulletin 2001年第13期46卷 1112-1117页

作者： WANG xiaolin & lu Junchang1. Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing 100044, China 2. College of Earth Sciences and Resources, China University of Geo-sciences, Beijing 100083, China 3. Department of Geological Sciences, Southern Methodist University, Dallas, TX 75275, USA Institute of Vertebrate Paleontology Chinese Academy of Sciences Beijing 100044 China

A well-preserved pterosaur with nearly complete skull is described from the Lower Cretaceous Yixian Formation at Sihetun in western Liaoning. It is characterized by a low and long crestless skull, slender and pointed teeth, long metacarpal, nearly equal length of metatarsals I -III and short pedal digit V. It is referred to a new genus and species of the family Pterodactylidae: Haopterus gracilis gen. et sp. nov. This is the first pterosaur with a nearly complete skull from the Jehol Biota; it also represents the first non-controversial fossil record of Pterodactylidae in Asia. Haopterus is more derived than Pterodactylus from the Late Jurassic Solnhofen in Germany. This discovery extends the distribution of the family Pterodactylidae from Europe and Africa to Asia and its latest occurrence from the Late Jurassic to the Early Cretaceous. The discovery of Haopterus gracilis provides further evidence for the study of the originand radiation of the Jehol Biota; it also sheds new light on the evolution and

关键词： western Liaoning Early Cretaceous Yixian Formation Pterodactylidae.

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Demand and key technology for a LEO constellation as augmentation of satellite navigation systems

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Satellite Navigation 2024年第1期5卷 1-9页

作者： Yuanxi Yang Yue Mao Xia Ren xiaolin Jia Bjiao Sun Xi’an Research Institute of Surveying and Mapping Xi’an710054ShaanxiChina State National Key Laboratory of Geo-Information Engineering Xi’an710054ShaanxiChina

A Low Earth Orbit(LEO)constellation augmenting satellite navigation is important in the future development of Global Navigation Satellite System(GNSS).GNSS augmented by LEO constellations can improve not only the accuracy of Positioning,Navigation,and Timing(PNT),but also the consistency and reliability of secure PNT *** paper mainly analyzes the diverse demands of different PNT users for LEO augmented GNSS,including the precision demand in real-time,the availability demand in special areas,the navigation signal enhancement demand in complex electromagnetic environments,and the integrity demand with high ***,the possible contributions of LEO constellations to PNT performance are analyzed from multiple aspects.A particular attention is paid to the special PNT user requirements that cannot be fulfilled with existing GNSS,such as the PNT service demand in the polar regions and the onboard GNSS orbit determination demand of some LEO *** key technologies to be considered in the constellation design,function realization,and payload development of the LEO-augmented navigation system are summarized.

关键词： Low earth orbit navigation constellation Accuracy augmentation Orbit determination Integrity

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