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Frontiers of Environmental Science & Engineering 2024年第2期18卷 25-34页

作者： Kui Zou Hongyuan Liu Bo feng Taiping Qing peng zhang College of Environment and Resources Xiangtan UniversityXiangtan 411105China

In the sewage treatment process,facilitating the conversion of pollutants into value-added resources holds great potential for reducing the amount of greenhouse gas emissions and promoting economic *** granule polypeptide(CGP),a recently discovered high value-added biopolymer present in activated sludge,has provided new avenues for the recovery of ***,the mechanisms that regulate CGP synthesis and the characteristics of this biopolymer in activated sludge remain unclear thus *** study investigated the synthesis of CGP,polyhydroxyalkanoates(PHA),and alginate-like exopolysaccharides(ALE)in various microbial aggregates under different carbon sources feeding *** results showed that the CGP yields was superior that of PHA and ALE when subjected to identical carbon source feeding ***,biofilm was more conducive to CGP accumulation than floc *** with glucose and methanol,sodium acetate significantly enriched the CGP synthetase-encoding gene(cphAabundance=~17419),resulting in the highest CGP yield(average 107.1 mg/g MLSS)in both biofilm and floc *** study is the first to reported the characteristic fluorescence of CGP(Ex/Em=~360/450 nm)caused by the aggregated luminescence of arginine on the side ***,this study highlights the potential application of CGP as a fluorescent material and offers insights into CGP recovery from activated sludge in wastewater treatment plants.

关键词： Cyanophycin Polyhydroxyalkanoate Alginate-like exopolysaccharides Bioresource recovery Aggregation-induced luminescence

MICROSTRUCTURE AND EROSION-CORROSION CHARACTERISTIC OF Ni-BASED COATINGS

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MICROSTRUCTURE AND EROSION-CORROSION CHARACTERISTIC OF Ni-BA...

Multi-objective optimization and evaluation of supercritical CO_(2) Brayton cycle for nuclear power generation

第七届国际热喷涂研讨会（ITSS’2004）暨第八届全国热喷涂年会（CNTSC’2004）

作者： zhang anfeng, zhang junhu, peng feng ( School of Mechanical Engineering, Xi’an Jiaotong University, China) ( Shendong Coal Limited Company, Shaanxi, China)

In order to improve the service life of low-carbon steel in erosion-corrosion working condition, low-carbon steel (ASTM1020) was used as substrate, and stainless steel (AISI321) was applied to contrast test. Erosion-corrosion synergism and failure mechanism and electrochemical behavior was investigated systematically in liquid-solid duel-phase fluid (5% E2SO4 +15% silica sand). The results show as follows: (1) The corrosion resistance of Delelo50 and Ni60JH coatings is 16 and 30 times higher than that of the substrate respectively;The erosion-corrosion resistance of Delelo50 coatings is 3-5 times higher than that of the substrate;The erosion-corrosion resistance of Ni60JH coatings is 8-15 times higher than that of the substrate, and excels stainless steel slightly. (2) The weight loss rates of synergistic effects between erosion and corrosion of materials increase from 42-66% to 78-85% of the total weight loss rates when the erosion velocity increased from 5m/s to 10m/s;In the pure corrosion medium, Ni60JH coatings and the stainless steel are uniform corrosion, but Delelo50 coatings and low-carbon steel are alternative corrosion. (3) In the erosion-wear process, the cutting and plowing are the main features for Ni60JH coatings, and that the plowing and plastic distorting are the main characters for Delelo50 coatings and two steels.

关键词： High velocity oxy-fuel (HVOF) Erosion and corrosion Synergism Liquid-solid duel-phase fluid

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Nuclear Science and Techniques 2024年第2期35卷 183-209页

作者： Guo-peng Yu Yong-feng Cheng Na zhang Ping-Jian Ming Sino-French Institute of Nuclear Engineering and Technology Sun Yat-Sen UniversityZhuhai 519082China School of Civil Engineering and Architecture East China Jiaotong UniversityNanchang 330013China

The supercritical CO_(2) Brayton cycle is considered a promising energy conversion system for Generation IV reactors for its simple layout,compact structure,and high cycle *** models of four Brayton cycle layouts are developed in this study for different reactors to reduce the cost and increase the thermohydraulic performance of nuclear power generation to promote the commercialization of nuclear *** analysis,multi-objective optimizations,and four decision-making methods are applied to obtain each Brayton scheme’s optimal thermohydraulic and economic *** show that for the same design thermal power scale of reactors,the higher the core’s exit temperature,the better the Brayton cycle’s thermo-economic *** the four-cycle layouts,the recompression cycle(RC)has the best overall performance,followed by the simple recuperation cycle(SR)and the intercooling cycle(IC),and the worst is the reheating cycle(RH).However,RH has the lowest total cost of investment(C_(tot))of$1619.85 million,and IC has the lowest levelized cost of energy(LCOE)of 0.012$/(kWh).The nuclear Brayton cycle system’s overall performance has been improved due to *** performance of the molten salt reactor combined with the intercooling cycle(MSR-IC)scheme has the greatest improvement,with the net output power(W_(net)),thermal efficiencyη_(t),and exergy efficiency(η_(e))improved by 8.58%,8.58%,and 11.21%,*** performance of the lead-cooled fast reactor combined with the simple recuperation cycle scheme was optimized to increase C_(tot) by 27.78%.In comparison,the internal rate of return(IRR)increased by only 7.8%,which is not friendly to investors with limited *** the nuclear Brayton cycle,the molten salt reactor combined with the recompression cycle scheme should receive priority,and the gas-cooled fast reactor combined with the reheating cycle scheme should be considered carefully.

关键词： Supercritical CO_(2)Brayton cycle Nuclear power generation Thermo-economic analysis Multi-objective optimization Decision-making methods

The Q-index and Connectivity of Graphs

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Journal of the Operations Research Society of China 2024年第2期12卷 505-519页

作者： peng-Li zhang Li-Hua feng Wei-Jun Liu Xiao-Dong zhang School of Mathematical Sciences MOE-LSCSHL-MACShanghai Jiao Tong UniversityShanghai 200240China School of Mathematics and Statistics Central South UniversityChangsha 410083HunanChina

A connected graph G is said to be k-connected if it has more than k vertices and remains connected whenever fewer than k vertices are *** this paper,for a connected graph G with sufficiently large order,we present a tight sufficient condition for G with fixed minimum degree to be k-connected based on the *** result can be viewed as a spectral counterpart of the corresponding Dirac-type condition.

关键词： Q-index Minimum degree k-connected

Tailoring chaotic motion of microcavity photons in ray and wave dynamics by tuning the curvature of space

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Science China(Physics,Mechanics & Astronomy) 2024年第7期67卷 107-112页

作者： Wei Lin Yechun Ding Yongsheng Wang peng Li Yanpeng zhang feng Yun feng Li Key Laboratory for Physical Electronics and Devices of the Ministry of Education Shaanxi Key Lab of Information Photonic TechniqueSchool of Electronic Science and EngineeringFaculty of Electronic and Information EngineeringXi’an Jiaotong UniversityXi’an 710049China Department of Electrical and Photonics Engineering Technical University of DenmarkKgs.Lyngby 2800Denmark Center for Regenerative and Reconstructive Medicine Med-X InstituteThe First Affiliated Hospital of Xi’an Jiaotong UniversityXi’an 710061China Solid-State Lighting Engineering Research Center Xi’an Jiaotong UniversityXi’an 710049China

Microcavity photon dynamics in curved space is an emerging interesting area at the crossing point of nanophotonics,chaotic science,and non-Euclidean *** report the sharp difference between the regular and chaotic motions of cavity photons subjected to the varying space *** the island modes of regular motion rise in the phase diagram in the curved space,the chaotic modes show special mechanisms to adapt to the space curvature,including the fast diffusion of ray dynamics,and the localization and hybridization of the Husimi wavepackets among different periodic *** observations are unique effects enabled by the combination of the chaotic trajectory,the wave nature of light,and the non-Euclidean orbital motion,and therefore make the system a versatile optical simulator for chaotic science under quantum mechanics in curved space-time.

关键词： microcavity chaotic motion curved space

Theoretical and Experimental Study on the Performance of Hermetic Diaphragm Squeeze Film Dampers for Gas-Lubricated Bearings

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Chinese Journal of Mechanical Engineering 2024年第3期37卷 151-169页

作者： Jianwei Wang Haoxi zhang Shaocun Han Hang Li peng Wang Kai feng State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Hunan UniversityChangsha 410082China

Low damping characteristics have always been a key sticking points in the development of gas *** application of squeeze film dampers can significantly improve the damping performance of gas lubricated *** paper proposed a novel hermetic diaphragm squeeze film damper(HDSFD)for oil-free turbomachinery supported by gas lubricated *** types of HDSFDs with symmetrical structure were proposed for good damping *** considering the compressibility of the damper fluid,based on hydraulic fluid mechanics theory,a dynamic model of HDSFDs under medium is proposed,which successfully reflects the frequency dependence of force *** on the dynamic model,the effects of damper fluid viscosity,bulk modulus of damper fluid,thickness of damper fluid film and plunger thickness on the dynamic stiffness and damping of HDSFDs were *** experimental test rig was assembled and series of experimental studies on HDSFDs were *** damper fluid transverse flow is added to the existing HDSFD concept,which aims to make the dynamic force coefficients independent of *** the force coefficient is still frequency dependent,the damping coefficient at high frequency excitation with damper fluid supply twice as that without damper fluid *** results serve as a benchmark for the calibration of analytical tools under development.

关键词： Hermetic diaphragm squeeze film damper Compressibility Dynamic model Experimental studies

Mechanism of internal thermal runaway propagation in blade batteries

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Journal of Energy Chemistry 2024年第2期89卷 184-194,I0005页

作者： Xuning feng Fangshu zhang Wensheng Huang Yong peng Chengshan Xu Minggao Ouyang School of Vehicle and Mobility Tsinghua UniversityBeijing 100084China

Blade batteries are extensively used in electric vehicles,but unavoidable thermal runaway is an inherent threat to their safe *** study experimentally investigated the mechanism underlying thermal runaway propagation within a blade battery by using a nail to trigger thermal runaway and thermocouples to track its propagation inside a *** results showed that the internal thermal runaway could propagate for up to 272 s,which is comparable to that of a traditional battery *** velocity of the thermal runaway propagation fluctuated between 1 and 8 mm s^(-1),depending on both the electrolyte content and high-temperature gas *** the early stages of thermal runaway,the electrolyte participated in the reaction,which intensified the thermal runaway and accelerated its *** the battery temperature increased,the electrolyte evaporated,which attenuated the acceleration *** diffusion affected thermal runaway propagation through both heat transfer and mass *** experimental results indicated that gas diffusion accelerated the velocity of thermal runaway propagation by 36.84%.We used a 1D mathematical model and confirmed that convective heat transfer induced by gas diffusion increased the velocity of thermal runaway propagation by 5.46%-17.06%.Finally,the temperature rate curve was analyzed,and a three-stage mechanism for internal thermal runaway propagation was *** Stage I,convective heat transfer from electrolyte evaporation locally increased the temperature to 100℃.In Stage II,solid heat transfer locally increases the temperature to trigger thermal *** StageⅢ,thermal runaway sharply increases the local *** proposed mechanism sheds light on the internal thermal runaway propagation of blade batteries and offers valuable insights into safety considerations for future design.

关键词： Lithium-ion battery Blade battery Thermal runaway Internal thermal runaway propagation

PHLDA2 reshapes the immune microenvironment and induces drug resistance in hepatocellular carcinoma

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Oncology Research 2024年第6期32卷 1063-1078页

作者： KUN feng HAO peng QINGpeng LV YEWEI zhang Hepatopancreatobiliary Center The Second Affiliated Hospital of Nanjing Medical UniversityNanjing210000China Medical School Southeast UniversityNanjing210000China

Hepatocellular carcinoma(HCC)is a malignancy known for its unfavorable *** dysregulation of the tumor microenvironment(TME)can affect the sensitivity to immunotherapy or chemotherapy,leading to treatment *** elucidation of PHLDA2’s involvement in HCC is imperative,and the clinical value of PHLDA2 is also ***,bioinformatics analysis was performed in multiple cohorts to explore the phenotype and mechanism through which PHLDA2 may affect the progression of ***,the expression and function of PHLDA2 were examined via the qRT-PCR,Western Blot,and MTT *** findings indicate a substantial upregulation of PHLDA2 in HCC,correlated with a poorer *** methylation levels of PHLDA2 were found to be lower in HCC tissues compared to normal liver ***,noteworthy associations were observed between PHLDA2 expression and immune infiltration in *** addition,PHLDA2 upregulation is closely associated with stemness features and immunotherapy or chemotherapy resistance in *** vitro experiments showed that sorafenib or cisplatin significantly up-regulated PHLDA2 mRNA levels,and PHLDA2 knockdown markedly decreased the sensitivity of HCC cells to chemotherapy ***,we found that TGF-βinduced the expression of PHLDA2 in *** GSEA and in vitro experiment indicated that PHLDA2 may promote the HCC progression via activating the AKT signaling *** study revealed the novel role of PHLDA2 as an independent prognostic factor,which plays an essential role in TME remodeling and treatment resistance in HCC.

关键词： HCC Immune infiltration Drug resistance TME PHLDA2

Design and identification of a double-acting piezoelectric-hydraulic hybrid actuator

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Chinese Journal of Aeronautics 2024年第3期37卷 456-467页

作者： Junjian zhang Zhihua feng Key Laboratory of Precision Scientific Instrumentation of Anhui Higher Education Institutes University of Science and Technology of ChinaHefei 230026China

Traditional single-acting piezoelectric-hydraulic hybrid actuators usually have the problem of inertial force caused by flow pulsation of the liquid,which degrades their output *** suppress or solve the associated inertial force and enhance its output capabilities,this paper proposes a new type of double-acting piezoelectric-hydraulic hybrid actuator with four check valves acting as mechanical *** new hybrid actuator was fabricated and its output performance was *** the voltage is 700 Vp-pand the bias pressure is 2 MPa,the pulsation ratesδof the new actuator at 400 Hz,500 Hz and 600 Hz are 2.29,2.08 and 1.78,respectively,whileδof the single-acting hybrid actuator under the same conditions are 10.98,11.05 and ***,the liquid pulsation rate of the new hybrid actuator is significantly reduced,which is beneficial for improving the flow uniformity and weakening the influence of inertial force on the hybrid *** strategy ultimately leads to a maximum no-load velocity of 168.1 mm/s at 600 Hz and a maximum blocking force of 141 N at 450 Hz for the new hybrid *** addition,this strategy has the potential to be used in other electrohydrostatic actuators to improve their performance.

关键词： Double-acting Flow pulsation Inertial force Piezoelectric actuators Piezoelectric devices Piezoelectric hydraulic actuation Piezoelectric pump

Traceable Lactate-Fueled Self-Acting Photodynamic Therapy against Triple-Negative Breast Cancer

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Research 2024年第3期2024卷 723-733页

作者： Yifan zhang Guangle feng Ting He Min Yang Jing Lin peng Huang Marshall Laboratory of Biomedical Engineering International Cancer CenterShenzhen Key Laboratory of Tumor Visualization Molecular MedicineLaboratory of Evolutionary Theranostics(LET)School of Biomedical EngineeringShenzhen University Medical SchoolShenzhen UniversityShenzhen518055China.

The depth of light penetration and tumor hypoxia restrict the efficacy of photodynamic therapy(PDT)in triple-negative breast cancer(TNBC),while the overproduction of lactate(LA)facilitates the development,aggressiveness,and therapy resistance of *** address these issues,a self-acting PDT nanosystem(HL@hMnO_(2)-LO_(x)@HA)is fabricated by loading 2-(1-hexyloxyethyl)-2-devinyl pyropheophorbide-alpha(HPPH),luminol,and LA oxidase(LO_(x))in a hyaluronic acid(HA)-coated hollow manganese dioxide(hMnO_(2))***_(x) catalyzes the oxidation of LA into pyruvate and hydrogen peroxide(H_(2)O_(2)),thus depleting the overproduced intratumoral *** the acidic tumor microenvironment,H_(2)O_(2) reacts with luminol and hMnO_(2) to yield blue luminescence as well as O_(2) and Mn^(2+),***^(2+)could further enhance this *** is then excited by the chemiluminescence through chemiluminescence resonance energy transfer for self-illuminated *** generated O_(2) alleviates the hypoxia state of the TNBC tumor to produce sufficient 1O_(2) for self-oxygenation *** Mn^(2+)performs T1 magnetic resonance imaging to trace the self-acting PDT *** work provides a biocompatible strategy to conquer the limits of light penetration and tumor hypoxia on PDT against TNBC as well as LA overproduction.

关键词： Breast Therapy manganese