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New direction for surgery:Super minimally invasive surgery

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World Journal of Gastroenterology 2024年第12期30卷 1676-1679页

作者： en-Qiang linghu Department of Gastroenterology First Medical Center of Chinese PLA General HospitalBeijing 100853China

the top goal of modern medicine is treating disease without destroying organ structures and making patients as healthy as they were before their *** invasive surgery(MIS)has dominated the surgical realm because of its lesser ***,changes in anatomical structures of the body and reconstruction of internal organs or different organs are common after traditional surgery or MIS,decreasing the quality of life of patients ***,I propose a new treatment mode,super MIS(SMIS),which is defined as“curing a disease or lesion which used to be treated by MIS while preserving the integrity of the organs”.In this study,I describe the origin,definition,operative channels,advantages,and future perspectives of SMIS.

关键词： Super minimally invasive surgery Minimally invasive surgery treatment mode traditional Surgery New direction for surgery

Efficient guiding and focusing of intense laser pulse using periodic thin slits

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Matter and Radiation at Extremes 2024年第4期9卷 29-39页

作者： l.Xu t.W.Huang K.Jiang c.N.Wu H.Peng P.c.hen R.li H.B.Zhuo c.t.Zhou Shenzhen Key laboratory of Ultraintense laser and Advanced Material technology Center for Intense Laser ApplicationTechnologyand College of Engineering PhysicsShenzhen Technology UniversityShenzhen 518118People’s Republic of China

Slits have been widely used in laser-plasma interactions as plasma optical components for generating high-harmonic light and controlling laser-driven particle ***,we propose and demonstrate that periodic thin slits can be regarded as a new breed of optical elements for efficient focusing and guiding of intense laser *** fundamental physics of intense laser interaction with thin slits is studied,and it is revealed that relativistic effects can lead to enhanced laser focusing far beyond the pure diffractive focusing *** addition,the interaction of an intense laser pulse with periodic thin slits makes it feasible to achieve multifold enhancement in both laser intensity and energy transfer efficiency compared with conventional *** results provide a novel method for manipulating ultra-intense laser pulses and should be of interest for many laser-based applications.

关键词： laser pulse intense

Fully spin-polarized, valley-polarized and spin-valley-polarized electron beam splitters utilizing zero-line modes in a three-terminal device

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chinese Physics B 2024年第6期33卷 596-603页

作者：吕小龙杨加恩谢航 college of Science Guangxi University of Science and TechnologyLiuzhou 545006China college of Physics Chongqing UniversityChongqing 401331China chongqing Key laboratory for Strongly-coupled Physics Chongqing UniversityChongqing 401331China

topological zero-line modes(ZlMs) with spin and valley degrees of freedom give rise to spin, valley and spinvalley transport, which support a platform for exploring quantum transport physics and potential applications in spintronic/valleytronic devices. In this work, we investigate the beam-splitting behaviors of the charge current due to the ZlMs in a three-terminal system. We show that with certain combinations of ZlMs, the incident charge current along the interface between different topological phases can be divided into different polarized currents with unit transmittance in two outgoing terminals. As a result, fully spin-polarized, valley-polarized and spin-valley-polarized electron beam splitters are generated. the mechanism of these splitters is attributed to the cooperative effects of the distribution of the ZlMs and the intervalley and intravalley scatterings that are modulated by the wave-vector mismatch and group velocity mismatch. Interestingly, half-quantized transmittance of these scatterings is found in a fully spin-valley-polarized electron beam ***, the results indicate that these splitters can be applicable to graphene, silicene, germanene and stanene due to their robustness against the spin–orbit coupling. Our findings offer a new way to understand the transport mechanism and investigate the promising applications of ZlMs.

关键词： topological zero-line modes spin polarization valley polarization quantum transport

Improved Segmented Belief Propagation list Decoding for Polar codes with Bit-Flipping

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china communications 2024年第3期21卷 19-36页

作者： Mao Yinyou Yang Dong liu Xingcheng Zou en School of Electronics and Information technology(SEIt) Sun Yat-sen University(SYSU)Guangzhou 510006China School of Information Science Guangzhou Xinhua UniversityGuangzhou 510520China Southern Marine Science and engineering Guangdong laboratory(Zhuhai) Zhuhai 519080China

Belief propagation list(BPl) decoding for polar codes has attracted more attention due to its inherent parallel nature. However, a large gap still exists with cRc-aided Scl(cA-Scl) *** this work, an improved segmented belief propagation list decoding based on bit flipping(SBPl-BF) is proposed. On the one hand, the proposed algorithm makes use of the cooperative characteristic in BPl decoding such that the codeword is decoded in different BP decoders. Based on this characteristic, the unreliable bits for flipping could be split into multiple subblocks and could be flipped in different decoders simultaneously. On the other hand, a more flexible and effective processing strategy for the priori information of the unfrozen bits that do not need to be flipped is designed to improve the decoding convergence. In addition, this is the first proposal in BPl decoding which jointly optimizes the bit flipping of the information bits and the code bits. In particular, for bit flipping of the code bits, a H-matrix aided bit-flipping algorithm is designed to enhance the accuracy in identifying erroneous code bits. the simulation results show that the proposed algorithm significantly improves the errorcorrection performance of BPl decoding for medium and long codes. It is more than 0.25 d B better than the state-of-the-art BPl decoding at a block error rate(BlER) of 10^(-5), and outperforms cA-Scl decoding in the low signal-to-noise(SNR) region for(1024, 0.5)polar codes.

关键词： belief propagation list(BPl)decoding bit-flipping polar codes segmented cRc

Melt flow,heat transfer and solidification in a flexible thin slab continuous casting mold with vertical-combined electromagnetic braking

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Journal of Iron and Steel Research International 2024年第2期31卷 401-415页

作者： lin Xu Ze-feng Han christian Karcher en-gang Wang Key laboratory of Electromagnetic Processing of Materials(Ministry of Education) Northeastern UniversityShenyang110819LiaoningChina Key laboratory of liaoning Province for clean combustion Power Generation and Heating technology Shenyang Institute of EngineeringShenyang110136LiaoningChina Institute of thermodynamics and Fluid Mechanics Technische Universität IlmenauIlmenau98684Germany

During continuous casting of steel slabs,the application of electromagnetic braking technology(EMBr)provides an effective tool to influence solidification by controlling the pattern of melt flow in the ***,the quality of the final product can be improved considerably.A new electromagnetic braking(EMBr)method,named vertical-combined electromagnetic braking(Vc-EMBr),is proposed to be applied to a flexible thin slab casting(FtSc)*** evaluate the beneficial effects of the Vc-EMBr,the melt flow,heat transfer,and solidification processes in the FtSc mold are studied by means of numerical *** detail,a Reynolds-averaged Navier–Stokes turbulence model together with an enthalpy-porosity approach was *** numerical findings are compared with respective simulations using the traditional *** results demonstrate that the application of the Vc-EMBr contributes significantly to preventing relative slab *** contrast to the Ruler-EMBr,the additional vertical magnetic poles of the Vc-EMBr preferentially suppress the direct impact of jet flow on the narrow face of FStc mold and considerably diminish the level fluctuation near the meniscus *** instance,by applying a magnetic flux density of 0.3 t,the maximum amplitude of meniscus deflection reduces by about 80%.Moreover,the braking effect of the Vc-EMBr effectively improves the homogeneity of temperature distribution in the upper recirculation region and increases the solidified shell thickness along the casting *** this basis,the newly proposed Vc-EMBr shows a beneficial effect in preventing relative slab defects for FtSc thin slab continuous casting.

关键词： Electromagnetic braking Mold Melt flow Heat transfer Solidification

the Perturbed compound Poisson Risk Model with Proportional Investment

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Acta Mathematicae Applicatae Sinica 2024年第1期40卷 109-128页

作者： Nai-dan Deng chun-wei Wang Jia-en Xu School of Mathematics and Statistics Henan University of Science and TechnologyLuoyang471023China

In this paper, the insurance company considers venture capital and risk-free investment in a constant proportion. the surplus process is perturbed by diffusion. At first, the integro-differential equations satisfied by the expected discounted dividend payments and the Gerber-Shiu function are derived. then, the approximate solutions of the integro-differential equations are obtained through the sinc method. Finally, the numerical examples are given when the claim sizes follow different distributions. Furthermore, the errors between the explicit solution and the numerical solution are discussed in a special case.

关键词： expected discounted dividend payments lognormal distribution proportional investment perturbed risk model sinc numerical method

Effect of radiative loss mechanisms on FIR thermometric parameters of Nd^(3+)-doped lithium tellurite glasses

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Journal of Rare Earths 2024年第7期42卷 1250-1257,I0002页

作者： c.Y.Morassuti A.P.l Silva l.A.O.Nunes S.M.lima l.H.c.Andrade Optical and Photothermal Spectroscopy Group(GEOF) Center for Studies in Natural Resources(CERNA)State University of Mato Grosso do Sul(UEMS)C.P.351DouradosMSBrazil Renato Archer Information technology center Dom Pedro I Highway(SP-65)Km 1436-Chácaras Campos dos AmaraisCampinasSPBrazil Institute of Physics of São carlos University of São PauloSão CarlosSPBrazil

Nd^(3+)-doped tellurite glasses are promising materials for thermometers based on the fluorescence intensity ratio(FIR)***,at high Nd^(3+)concentrations,energy transfer(Et)processes such as optical reabsorption and cross-relaxation can affect the Nd^(3+)emission,which has been little explored in the ***,the present work investigated the use of Nd^(3+)-doped tellurite glass(samples doped with Nd^(3+)at 0.2 mol%,0.5 mol%,2.0 mol%,and 4.0 mol%)in fluorescence thermometers,in the temperature range from 299 to 371 *** results indicate a strong dependence of the FIR parameters on the Nd^(3+)concentration,due to changes in the emission band profiles caused by optical reabsorption of the Nd^(3+)emissions and cross-relaxation processes.A decrease of the relative sensitivity of the ratio^(4)F_(5/2)→^(4)I_(9/2)/^(4)F_(3/2)→^(4)I_(9/2)is observed for samples doped with higher amounts of Nd^(3+).the maximum relative sensitivity at 299 K is 3.00%/K,which is the highest value among the reported Nd^(3+)ions.

关键词： Nd^(3+)-doped tellurite glass Fluorescence intensity ratio Optical thermometry Judd-Ofelt Rare earths

Recent Advances in catalytic carbonylation Reactions in Alternative Reaction Media

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chinese Journal of chemistry 2024年第4期42卷 406-429页

作者： csaba Árvai lászló t.Mika Department of chemical and environmental Process engineering Faculty of Chemical Technology and BiotechnologyBudapest University of Technology and EconomicsMűegyetem rkp.3H-1111 BudapestHungary

Since the discovery of the hydroformylation(oxo-synthesis or Roelen reaction)and the Reppe-reaction,the transition metal-catalyzed carbonylation reactions,providing versatile,facile,and even atom-economic methods for the selective incorporation of c=O functionality to various skeletons,have gained tremendous importance in synthetic organic chemistry from laboratories to industrial *** carbonylation of carbon-carbon multiple bonds,aromatic halides,triflates,etc.,in the presence of various nucleophiles has led the way to produce aldehydes,carboxylic acids,esters,amides,etc.,in the fine chemical ***,these protocols usually proceed in conventional,fossil-based,and usually toxic reaction ***,several attempts have been directed to developing efficient carbonylation methods in alternative,less harmful,non-fossil-based and even in renewable reaction *** this review,we overview the recent applications of alternative solvents such as water,biomass-based alcohols,γ-valerolactone(GVl),2-methyltetrahydrofuran(2-MetHF),ionic liquids(Ils),deep eutectic solvents(DES),alkyl levulinates,limonene,α-pinene,and dimethyl carbonate as well as fluorous media to improve efficiency,safety and environmentally benign nature of carbonylation protocols.

关键词： carbonylation catalysis Solvents Green chemistry carbon monoxide transition metals Homogeneous catalysis Palladium

curcumin Interferes with tGF-β1-Induced Fibrosis in NRK-49F cells by Reversing ADAMtS18 Gene Methylation

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chinese Journal of Integrative Medicine 2024年第7期30卷 600-607页

作者： XU Ben ZHANG Jia-en YE lin YUAN chang-wei Department of Urology Peking University First Hospital and Institute of UrologyPeking UniversityNational Urological Cancer CenterBeijing100034China

Objective to explore the molecular mechanism by which curcumin affects renal interstitial fibrosis(RIF)progression by regulating ADAM metallopeptidase with thrombospondin type 1 motif 18(ADAMtS18)*** NRK-49F cells RIF model were induced with transforming growth factorβ1(tGF-β1).Effects of different concentrations of curcumin(0,10,20,and 30μmol/l)on cell proliferation,cell cycle,cell apoptosis as well as cyclin D1 expression were analyzed by cell counting kit-8,flow cytometry and Western blot,***18 methylation levels were determined by methylation-specific polymerase chain ***18,fibronectin(FN),type I collagen(col-I)and alpha-smooth muscle actin(α-SMA)mRNA and protein expressions were analyzed by real-time PcR(Rt-PcR)and Western blot,***,cells were treated with 50 mmol/l 5-aza-2′-deoxycytidine(5-aza-dc,demethylation agent)for 72 *** of curcumin on extracellular matrix(EcM)deposition was evaluated by immunochemical staining and Western ***-49F cells were transfected with ADAMtS18 small interfering RNA and grouped into a normal control,ADAMtS18-knock-out(KO),and ADAMtS18-KO+30μmol/l curcumin groups,and whether curcumin can reverse the effect of ADAMtS18 knockdown on RIF was *** compared with the control group,tGF-β1 significantly inhibited the proliferation of NRK-49F cells,blocked the G1/G0 phase,promoted cell apoptosis and inhibited cyclin D1 expression(Pthe different concentrations of curcumin,30μmol/l curcumin significantly reversed these processes(Pchemical staining and Western blot results showed that curcumin significantly inhibited the deposition of FN,col-I andα-SMA(Pcurcumin and 5-zaz-dc had synergistic effects,promoting ADAMtS18 expression,removing ADAMtS18 methylation,and reducing EcM ***18 knockdown promoted EcM accumulation,and curcumin reversed this process(Pconclusion tGF-β1-induced fibrosis in NRK-49F ***

关键词： renal fibrosis curcumin chinese medicine ADAMtS18 methylation modification