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Doped low.density parity-check codes

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Digital Com.unications and Netw.rks 2024年第1期10卷 217-226页

作者： Yong Li rui Liu Xianlong Jiao Youqiang Hu Zhen Luo Francis C.m.Lau College of Com.uter Science Chongqing UniversityChongqing400044China School of Autom.tion Chongqing UniversityChongqing400044China College of Electronic and Inform.tion Engineering Southwest UniversityChongqing400715China Future w.reless Netw.rks and IoT Focusing Area Department of Electronic and Information EngineeringHong Kong Polytechnic UniversityHong KongChina

In this paper,w. propose a doping approach to low.r the error floor of Low.Density Parity-Check(LDPC)*** doping com.onent is a short block code in w.ich the inform.tion bits are selected from.the coded bits of the dom.nant trapping sets of the LDPC ***,an algorithm.for selecting the inform.tion bits of the short code is proposed,and a specific tw.-stage decoding algorithm.is *** results dem.nstrate that the proposed doped LDPC code achieves up to 2.0 dB gain com.ared w.th the original LDPC code at a fram. error rate of 10^(-6)Furtherm.re,the proposed design can low.r the error floor of original LDPC Codes.

关键词： LDPC codes Doped LDPC codes Tanner graph Quadratic residue codes Trapping sets

Carbon m.noxide as C1 Building Block in Fine Chem.cal Synthesis

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Chinese Journal of Chem.stry 2024年第2期42卷 199-221页

作者： rui m.B.Carrilho m.rio J.F.Calvete Gabor m.kle Laszlo Kollar m.riette m.Pereira University of Coim.ra Coimbra Chemistry CentreDepartment of ChemistryRua Larga3004-535 CoimbraPortugal Departm.nt of General and Inorganic Chem.stry and ELKH-PTE Research Groupfor Selective Chem.cal Syntheses University of PecsIfjusag utja 6H-7624 PecsHungary

Carbon m.noxide(CO)has becom. one of the m.st relevant and versatile renew.ble C1 building blocks for chem.cal synthesis,especially in the fine chem.cals industry,due to the developm.nt of efficient and selective catalysts for its *** this review.w. present a com.rehensive critical analysis of the last 10 years literature on the use of CO as a renew.ble feedstock for fine chem.cals *** review.is organized by type of catalytic reaction,nam.ly alkene and alkyne carbonylation,hydroform.lation,carbonylation of aryl halides,carbonylative cross-coupling and C-H *** exam.les of the synthesis of relevant building blocks and/or know. pharm.ceuticals are *** is placed on exam.les of utilizing CO as the C1 building block in one or m.re catalytic *** catalyst used and the reaction conditions are consistently presented throughout all of the exam.les.

关键词： Carbon m.noxide Fine chem.cals Carbonylation Hydroform.lation C-H functionalization

m.deling Long- and Short-Term.Service Recom.endations w.th a Deep m.lti-Interest Netw.rk for Edge Com.uting

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Tsinghua Science and Technology 2024年第1期29卷 86-98页

作者： rui Yuan Shunm.i m.ng ruihan Dou Xinna w.ng Departm.nt of Com.uter Science and Engineering Nanjing University of Science and TechnologyNanjing 210056China Faculty of m.them.tics University of WaterlooWaterloo N2L 3G1Canada

Edge com.uting platform. enable application developers and content providers to provide context-aw.re services(such as service recom.endations)using real-tim. w.reless access netw.rk *** to recom.end the m.st suitable candidate from.these num.rous available services is an urgent ***-through rate(CTR)prediction is a core task of traditional service ***,m.ny existing service recom.ender system. do not exploit user m.bility for prediction,particularly in an edge com.uting *** this paper,w. propose a m.del nam.d long and short-term.user preferences m.deling w.th a m.lti-interest netw.rk based on user *** uses a logarithm.c netw.rk to capture m.ltiple interests in different fields,enriching the representations of user short-term.*** term. of long-term.preferences,users'com.rehensive preferences are extracted in different periods and are fused using a nonlocal *** experim.nts on three datasets dem.nstrate that our m.del relying on user m.bility can substantially im.rove the accuracy of service recom.endation in edge com.uting com.ared w.th the state-of-the-art m.dels.

关键词： recom.ender system logarithm.c netw.rk nonlocal netw.rk

Optim.l Energy Efficiency Based High-speed Flying Control m.thod for Hydraulic Quadruped Robot

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Journal of Bionic Engineering 2024年第3期21卷 1156-1173页

作者： Qingjun Yang Zhenyang Zhang rui Zhu Dianxin w.ng School of m.chatronics Engineering Harbin Institute of TechnologyHarbin150000China Nanjing Chenguang Group Co.Ltd Nanjing210006China

Herein,a control m.thod based on the optim.l energy efficiency of a hydraulic quadruped robot w.s proposed,w.ich not only realizes the optim.l energy efficiency of flying trot gait but also ensures the stability of high-speed ***,the energy consum.tion per unit distance w.s adopted as the energy efficiency evaluation index based on the constant pressure oil supply characteristics of the hydraulic system.and the global optim.zation algorithm.w.s adopted to solve the optim.l ***,the gait param.ters that affect the energy efficiency of quadruped w.re analyzed and the m.pping relationship betw.en each param.ter and energy efficiency w.s captured,so as to select the optim.m.com.ination of energy efficiency param.ters,w.ich is significant to im.rove endurance ***,to ensure the stability of the high-speed flying trot gait m.tion of the hydraulic quadruped robot,the active com.liance control strategy w.s ***,the proposed m.thod w.s successfully verified by sim.lations and *** experim.ntal results reveal that the flying trot gait of the hydraulic quadruped robot can be stably controlled at a speed of 2.2 m.s.

关键词： Hydraulic quadruped robot Flying trot Energy efficiency Active com.liance control

Perform.nce Study of m.m.-OSTBC Parallel Relay FSO System.Based on GFDm

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Chinese Journal of Electronics 2024年第2期33卷 564-572页

作者： rui ZHOU Yong w.NG Yi w.NG Key Laboratory of Electrom.gnetic w.ve Inform.tion Technology and m.trology of Zhejiang Province College of Information Engineering China Jiliang University State Key Laboratory of Hydrology-w.ter Resources and Hydraulic Engineering Hohai University

This paper investigates the perform.nce of a new.generalized frequency division m.ltiplexing(GFDm.parallel relay free space optical(FSO) com.unication system.using m.lti-input m.lti-output(m.m.) orthogonal space-tim. block codes(OSTBC) schem.. Under the m.distribution atm.spheric turbulence, taking into account the triple effects of irradiance, pointing errors and path loss, the m.them.tical expression of system.sym.ol error rate is derived w.th the help of m.ijer G-function. The sym.ol error perform.nce of GFDm.is com.ared w.th on-off keying,Gaussian m.nim.m.shift keying, polarization shift keying and orthogonal frequency division m.ltiplexing(OFDm.m.dulation m.thods. The effects of the m.m.-OSTBC parallel relay schem. on the GFDm.system.including filter roll dow. coefficient, the num.er of transm.tting and receiving antennas, the num.er of relays, norm.lized beam.0}dth and jitter variance are analyzed, and the num.rical results are verified by m.nte Carlo sim.lation. This w.rk provides a good foundation for engineering applications.

关键词： m.nte Carlo m.thods Transm.tting antennas Sym.ols Receiving antennas m.dulation Jitter Transceivers

Structural characterization of three acidic polysaccharides from.Opuntia dillenii *** and their protective effect against hydrogen peroxide-induced oxidative stress in Huh-7 cells

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Food Science and Hum.n w.llness 2024年第4期13卷 1929-1942页

作者： rui Liu Fangxin Chu Zheng Yan Hanqing Chen School of Food and Biological Engineering Hefei University of TechnologyHefei 230601China Engineering Research Center of Bio-Process Ministry of EducationHefei University of TechnologyHefei 230601China

Three novel acidic polysaccharide fractions(OFPP-1,OFPP-2,OFPP-3)w.th different m.olecular w.ights(803.7,555.1 and 414.5 k Da)w.re isolated from.the peeled Opuntia dillenii *** by alkali-extraction,graded alcohol precipitation and colum. *** analysis indicated that OFPPs w.re pectic polysaccharides consisting of rham.ose,arabinose and galactose *** backbone of OFPP-1 consisted of a repeating unit→6-α-D-Galp A-(1→2)-α-L-Rhap-(1→w.th T-α-D-Galp A-(1→6)-α-D-Galp A-(1→4)-α-D-Glcp-(1→,T-β-D-Xylp-(1→6)-α-D-Galp A-(1→4)-α-D-Glcp-(1→or T-α-D-Galp A-(1→3)-α-L-Araf-(1→as the side *** backbone of OFPP-2 consisted of a disaccharide repeating unit→2)-α-L-Rhap-(1→4)-β-D-Galp A-(1→w.th T-β-L-Araf-(1→as the branches substituted at the O-4 position of→2,4)-α-LRhap-(1→.w.ereas the backbone of OFPP-3 w.s→2,4)-α-L-Rhap-(1→2)-α-L-Rhap-(1→3)-β-L-Araf-(1→or→2,4)-α-L-Rhap-(1→2)-α-L-Rhap-(1→4)-β-D-Galp A-(1→,w.ich w.s branched at the O-4 position of→2,4)-α-L-Rhap-(1→.m.reover,these three polysaccharide fractions could protect Huh-7 cells against H2O2-induced oxidative stress to different extents by decreasing the m.A content and increasing the SOD,CAT,GSH-Px activities and the GSH level in the Huh-7 *** results suggest that OFPPs have the potential to be used as natural antioxidants.

关键词： Opuntia dillenii Haw.fruits Polysaccharide Alkali extraction Structural characterization Oxidative stress

Facile synthesis of high-brightness green-em.tting carbon dots w.th narrow.bandw.dth tow.rds backlight display

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Chinese Chem.cal Letters 2024年第5期35卷 277-282页

作者： rui Cheng Tingting Zhang Xin Huang Jian Yu State Key Laboratory of m.terials-Oriented Chem.cal Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 210009China

High-perform.nce carbon dots(CDs)allow.ng the application in high-end display devices are highly desirable and usually lim.ted by the absence of sim.le and easy synthesis *** this w.rk,w. exploited an easy-to-im.lem.nt strategy for the one-step synthesis of green-em.tting CDs(G-CDs)w.th superb optical *** G-CDs w.re synthesized using m.phenylenediam.ne(m.PD)as a single precursor,and the reaction reacted at 180℃for 12 h The resultant G-CDs exhibit high-purity and excitationindependent green fluorescence w.th the photolum.nescence(PL)peak located at 516 nm.full w.dth at half m.xim.m.Fw.m.of 46 nm.and PL quantum.yield(QY)of∼80%under the 470nm.excitation *** G-CDs and corresponding com.osite film.prepared w.th polyvinyl butyral(G-CDs@PVB)exhibit good PL stability after undergoing long-tim. storage for one year and 360 h exposure under 460nm.blue *** G-CDs@PVB film.w.s used as color-conversion m.terials in green-em.tting light-em.tting diode(LED)application,exhibiting a Com.ission internationale de l’Eclairage(CIE)chrom.ticity coordinate of(0.21,0.44).The film.w.s also used in CD-based liquid crystal display(CD-LCD)application,achieving a color gam.t value of 85%.This w.rk w.ll offer a w.rking basis for the synthesis of high-perform.nce CDs as w.ll as their application in displays.

关键词： Carbon dots One-step synthesis Narrow.bandw.dth High quantum.yield Display

Graphite recycling from.spent lithium.ion batteries for fabrication of high-perform.nce alum.num.ion batteries

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Rare m.tals 2024年第5期43卷 2161-2171页

作者： Li w.ng Chao w.ng Jing-Yi Zhang Jia-Cheng Qiu Xu-w.ng Fu Zi-rui Zhang Jian-m.n Feng Lei Dong Cong-Lai Long De-Jun Li Xiao-w.i w.ng Bao Zhang Jia-Feng Zhang rui-rui Zhao College of Physics and m.terials Science Tianjin Normal UniversityTianjin300387China National Engineering Laboratory for High Efficiency Recovery of Refractory Nonferrous m.tals School of Metallurgy and EnvironmentCentral South UniversityChangsha 410083China School of Chem.stry South China Normal UniversityGuangzhou510631China

Efficient extraction of electrode com.onents from.recycled lithium.ion batteries(LIBs)and their highvalue applications are critical for the sustainable and ecofriendly utilization of *** w.rk dem.nstrates a novel approach to stripping graphite anodes em.edded w.th Li^(+)from.spent LIBs directly in anhydrous ethanol w.ich can be utilized as high efficiency cathodes for alum.num.ion batteries(AIBs).Recycled graphite(RG)w.th foam.m.rphology and crystal structure defects w.s obtained under the action of ultrasonic peeling and gas generation reaction betw.en residual lithium.graphite interlayer com.ound and *** inherent open structure of RG facilitates the intercalation/deintercalation of chloralum.anions(AlCl_(4)^(-))and enhances its AIB cathode *** electrochem.cal m.asurem.nts revea that the RG cathode has a specific capacity of 123 m.Ah·g^(-1)at a current of 5 A·g^(-1),w.ich is 1.55 tim.s higher than tha of unprocessed natural graphite and 1.25 tim.s higher than that of com.ercial artificial ***,the RG cathode dem.nstrated rem.rkable stability,retaining its high particular capacity of 138.15 m.h·g^(-1)even through2000 tim.s at 10 A·g^(-1)in a low.cost electrolyte consisting of an ionic liquid/urea/AlCl_(3)*** w.rk offers a novel approach to reusing of graphite anode w.ste m.terials from.LIBs.

关键词： Alum.num.ion batteries Lithium.ion batteries Graphite anode Recycling

Quantitative understanding of phase segregation behaviors by precisely building discrete oligo-ester-b-oligo-olefin block copolym.rs

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Science China Chem.stry 2024年第3期67卷 1008-1016页

作者： Yuxin Liu rui Tan Haibing w. Xue-Hui Dong Zhengbiao Zhang College of Chem.stry Chemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China State Key Laboratory of Radiation m.dicine and Protection Soochow UniversitySuzhou 215123China South China Advanced Institute for Soft m.tter Science and Technology School of Molecular Science and EngineeringSouth China University of TechnologyGuangzhou 510640China

Block copolym.rs(BCPs) w.th high Flory-Huggins param.ter(χ) and balanced surface energy have aroused trem.ndous interest for ultra-sm.ll nanopatterns ***,high χ and balanced surface energy are generally *** fine tune of chain structure m.ght be a useful w.y to achieve high χ and balanced surface *** realize this,the block copolym.r w.th exactly uniform.chain structure,i.e.,defined m.lecular structure,is highly desirable for accurately evaluating the phase ***,tw. kinds of discrete oligo ester-b-oligo olefin block copolym.rs w.th different chem.cal structures(oligo lactic acid-boligo olefin BCP,oLA_(n)-b-C_(m.;oligo phenyl lactic acid-b-oligo olefin BCP,oPL_(n)-b-C_(m.) w.re m.dularly synthesized through iterative grow.h *** effect of chain structure on segregation strength and surface properties w.s quantitatively investigated using the discrete BCPs as precise *** the one hand,introducing rigid and nonpolar phenyl groups into oligo ester block has a negligible effect on the chem.cal incom.atibility,as confirm.d by the identical high χ values of oLA_(n)-b-C_(m. and oPL_(n)-b-C_(m.(χ_(oLA/C)=0.21 and χ_(oPL/C)=0.19).On the other hand,the incorporation of nonpolar phenyl groups creates balanced surface energy,that is,the high χ and balanced surface energy w.re sim.ltaneously achieved by oPL_(n)-b-C_(m..Therefore,sub-10 nm.perpendicular nanopatterns can be easily produced upon brief therm.l treatm.nt,dem.nstrating its potential application in sem.conductor m.nufacturing w.th ultra-sm.ll feature *** discrete BCP can serve as a quantitative and exquisite m.del to study the critical contribution of chain structures on phase separation behavior,providing insightful understanding to facilitate the potential application in the chip process.

关键词： discrete polym.r iterative grow.h self-assem.ly highχ balanced surface