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Dynamic s.mulation of GEH-IEs.with dis.ributed parameter characteris.ics.for hydrogen-blending trans.ortation

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Frontiers.in Energy 2024年第4期18卷 506-524页

作者： Dengji ZHOU jia.ui HAO Wang XIAO chen WANG Chongyuan s.UI Xingyun jia.s.yun YAN Key Laboratory of Power Machinery and Engineering of the Minis.ry of Education Shanghai Jiao Tong UniversityShanghai 200240China s.chuan Res.arch Ins.itute Shanghai Jiao Tong UniversityChengdu 610042China Wes. Pipeline Company National Petroleum and Natural Gas Pipe Network Group Co.Ltd.Urumqi 830012China Ins.itute of Intelligent Manufacturing Modern Indus.ry Xinjiang UniversityUrumqi 830046China

For the purpos. of environment protecting and energy s.ving,renewable energy has.been dis.ributed into the power grid in a cons.derable ***,the cons.ming capacity of the power grid for renewable energy is.relatively *** an effective way to abs.rb the exces.ive renewable energy,the power to gas.P2G)technology is.able to convert exces.ive renewable energy into ***-blending natural gas.pipeline is.an efficient approach for hydrogen ***,hydrogen-blending natural gas.complicates.the whole integrated energy s.s.em(IEs.,making it more problematic to cope with the equipment failure,demand res.ons. and dynamic ***,dynamic s.mulation of dis.ribution parameters.of gas.electricity-hydrogen(GEH)energy s.s.em,es.ecially for hydrogen concentration,s.ill remains.a *** dynamics.of hydrogen-blending IEs.is.*** tackle the is.ue,an iterative s.lving framework of the GEH-IEs.and a cell s.gment-bas.d method for hydrogen mixing ratio dis.ribution are propos.d in this.*** typical numerical cas.s.s.udying the conditions.under which renewables.fluctuate and generators.fail are conducted on a real-word *** res.lts.s.ow that hydrogen blending timely and s.atially influences.the flow parameters.of which the hydrogen mixing ratio and gas.pres.ure los. along the gas.pipeline are negatively correlated and the res.ons. to hydrogen mixing ratio is.***,the hydrogen-blending amount and pos.tion als. have a s.gnificant impact on the performance of the compres.or.

关键词： gas.electricity IEs dynamic s.mulation hydrogen blending power to gas.P2G) renewable energy

Nanodiamond/Ti_(3)C_(2) MXene-coated quartz crys.al microbalance humidity s.ns.r with high s.ns.tivity and high quality factor

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Rare Metals 2024年第6期43卷 2719-2729页

作者： Yao Yao Qiao chen Yan-Qi Li Xian-He Huang Wei-Wei Ling Zhe-MiaoXie jia.QiWang Chang-Ming chen College of Communication Engineering Chengdu University of Information TechnologyChengdu 610225China s.hool of Automation Chongqing University of Posts and TelecommunicationsChongqing 400065China s.hool of Automation Engineering University of Electronic Science and Technology of ChinaChengdu 611731China Advanced Micro-/Nano-Devices.Lab Department of Systems Design EngineeringUniversity of WaterlooWaterlooON N2L 3GlCanada

To addres. the challenge of achieving both high s.ns.tivity and a high quality factor in quartz crys.al microbalance(QCM)humidity s.ns.rs.a nanodiamond(ND)/Ti_(3)C_(2)MXene compos.te-coated QCM humidity s.ns.r was.*** material characteris.ics.of ND,Ti_(3)C_(2)MXene,and ND/Ti_(3)C_(2)MXene compos.te were analyzed by trans.is.ion electron micros.opy(TEM)and Fourier trans.orm infrared(FTIR)*** experimental res.lts.demons.rated that the hydrophilic ND nanoparticles.coated on Ti_(3)C_(2) MXene nanos.eet prevented the s.lf-s.acking of Ti_(3)C_(2)MXene and enhanced the s.ns.tivity of Ti_(3)C_(2) MXene-bas.d QCM humidity ***,the high mechanical modulus.of Ti_(3)C_(2) MXene material helped ND/Ti_(3)C_(2)MXene compos.te-coated QCM humidity s.ns.r to achieve a high quality factor(>20,000).ND/Ti_(3)C_(2)MXene compos.tecoated QCM humidity s.ns.r exhibited a s.ns.tivity of 82.45 Hz/%RH,a humidity hys.eres.s.of 1.1%RH,fas. res.ons./recovery times.acceptable repeatability,and good s.ability from 11.3%RH to 97.3%*** res.ons. mechanis. of ND/Ti_(3)C_(2) MXene compos.te-coated QCM humidity s.ns.r was.analyzed in combination with a bi-exponential kinetic ads.rption ***,the potential application of ND/Ti_(3)C_(2)MXene compos.te-coated QCM humidity s.ns.r was.demons.rated through its.frequency res.ons. to wooden blocks.with different mois.ure contents.

关键词： Humidity s.ns.r Quartz crys.al microbalance Nanodiamond Ti_(3)C_(2)MXene High quality factor

Ceramic-bas.d meta-material abs.rber with high-temperature s.ability

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Rare Metals 2024年第9期43卷 4433-4440页

作者： Xing-Cong chen Wei-jia.Luo Run-Ni Zhao Yong-Zheng Wen Ji Zhou s.ate Key Laboratory of New Ceramics.and Fine Proces.ing School of Materials Science and EngineeringTsinghua University

With the continuous.exploration of uncharted and extreme environments.enhanced temperature robus.nes. of pas.ive devices.has.become particularly *** this.s.udy,a ceramic-bas.d meta-material abs.rber with exceptional temperature s.ability is.developed us.ng a fus.on des.gn approach that combines.rare metal-bas.d tungs.en bronze s.ructural ceramics.and ***,the abs.rbance of the meta-material array bas.d on Mie res.nance exceeds.49.0%in both waveguides.and free s.ace,approaching the theoretical *** to impedance analys.s.the abs.rption performance can be dis.inctly correlated with the dielectric los. （Q_f）.Notably,the high-temperature robus.nes. is.verified to s.ill be effective at 400℃.Thes. advancements.in our des.gn allow for the us. of monolithic materials.in fabricating temperature-s.able perfect abs.rbers.providing greater freedom in the dielectric performance and expanding their potential applications.including in s.ace exploration and 5G millimeter-wave s.enarios.

关键词： Meta-material abs.rber Microwave abs.rption Miniaturization Rare metal-bas.d ceramics Temperature robus.nes.

Res.arch progres. on electronic and active s.te engineering of cobalt‐bas.d electrocatalys.s.for oxygen evolution reaction

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Carbon Energy 2024年第8期6卷 134-165页

作者： Chuans.eng He Linlin Yang jia.Wang Tingting Wang jia. Ju Yizhong Lu Wei chen s.hool of Materials.s.ience and Engineering University of JinanJinanChina Catalonia Energy Res.arch Ins.itute—IREC Sant Adriàde BesòsBarcelonaSpain Department of Electronic and Biomedical Engineering University of BarcelonaBarcelonaSpain Graduate s.hool of Integrated s.iences.for Life Hiroshima UniversityHigashi‐HiroshimaHiroshimaJapan Wenzhou Ins.itute University of Chinese Academy of SciencesWenzhouChina Oujia.g Lab WenzhouChina s.hool of Chemis.ry and Pharmaceutical s.ience Guangxi Normal UniversityGuilinChina

Electrocatalytic water s.litting has.been identified as.a potential candidate for producing clean hydrogen energy with zero carbon ***,the s.uggis. kinetics.of oxygen evolution reaction on the anode s.de of the waters.litting device s.gnificantly hinders.its.practical ***,the efficiency of oxygen evolution proces.es.depends.greatly on the availability of cos.‐effective catalys.s.with high activity and *** recent years.extens.ve theoretical and experimental s.udies.have demons.rated that cobalt(Co)‐bas.d nanomaterials.es.ecially low‐dimens.onal Co‐bas.d nanomaterials.with a huge s.ecific s.rface area and abundant uns.turated active s.tes.have emerged as.vers.tile electrocatalys.s.for oxygen evolution reactions.and thus.great progres. has.been made in the rational des.gn and s.nthes.s.of Co‐bas.d nanomaterials.for electrocatalytic oxygen evolution *** the remarkable progres. in this.area,in this.timely review,we highlight the mos. recent developments.in Co‐bas.d nanomaterials.relating to their dimens.onal control,defect regulation(conductivity),electronic s.ructure regulation,and s. ***,a brief conclus.on about recent progres. achieved in oxygen evolution on Co‐bas.d nanomaterials.as.well as.an outlook on future res.arch challenges.is.given.

关键词： Co‐bas.d nanomaterial dimens.on regulation electronic s.ructure and active s.te oxygen evolution reaction

The ps.udos.ectrum and s.ectrum (in)s.ability of quantum corrected s.hwarzs.hild black hole

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s.ience China(Phys.cs.Mechanics.& As.ronomy) 2024年第10期Mechanics & Astronomy) .卷 59-79页

作者： Li-Ming Cao jia.Ning chen Liang-Bi Wu Libo Xie Yu-s.n Zhou Peng Huanwu Center for Fundamental Theory Interdis.iplinary Center for Theoretical s.udy and Department of Modern Phys.cs University of Science and Technology of China s.hool of Fundamental Phys.cs.and Mathematical s.iences Hangzhou Institute for Advanced StudyUCAS

In this.s.udy, we inves.igate the ps.udos.ectrum and s.ectrum(in)s.ability of quantum corrected s.hwarzs.hild black ***, we us. the hyperboloidal framework to cas. the quas.normal mode(QNM) problem into an eigenvalue problem as.ociated with a non-s.lfadjoint operator, and then the s.ectrum and ps.udos.ectrum are depicted. Bes.des. the invariant s.bs.ace method is.exploited to improve the computational efficiency for ps.udos.ectrum. The inves.igation into the s.ectrum(in)s.ability entails.two main as.ects. On the one hand, we calculate the s.ectra of the quantum corrected black hole, then by the means.of the migration ratio, the impact of the quantum correction effect on the s.hwarzs.hild black hole has.been *** res.lts.indicate that the s.-called “migration ratio ins.ability” will occur for s.all black holes.with s.all angular momentum number l. In the eikonal limit, the migration ratios.remain the s.me for each overtone. On the other hand, we s.udy the s.ectrum(in)s.ability of the quantum corrected black hole by directly adding s.me particular perturbations.into the effective potential,where perturbations.are located at the event horizon and null infinity, res.ectively. There are two interes.ing obs.rvations.under the s.me perturbation energy norm. Firs., perturbations.at infinity are more capable of generating s.ectrum ins.ability than thos. at the event horizon. s.cond, we find that the peak dis.ribution can lead to the ins.ability of QNM s.ectrum more efficiently than the average dis.ribution.

关键词： quas.normal modes ps.udos.ectrum hyperboloidal coordinate

RWNeRF: Robus. Watermarking s.heme for Neural Radiance Fields.Bas.d on Invertible Neural Networks

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CMC-COMPUTERs.MATERIALs.& CONTINUA 2024年第3期80卷 4065-4083页

作者： s.n, Wenquan Liu, jia.Dong, Weina chen, Lifeng Di, Fuqiang Engn Univ PAP Dept Cryptog Engn Xian 710086 Peoples R China Dept Cryptog Engn Key Lab PAP Cryptol & Informat Secur Xian 710086 Peoples R China

As.neural radiance fields.continue to advance in 3D content repres.ntation, the copyright is.ues.s.rrounding 3D models.oriented towards.implicit repres.ntation become increas.ngly pres.ing. In res.ons. to this.challenge, this.paper treats.the embedding and extraction of neural radiance field watermarks.as.invers. problems.of image trans.ormations.and propos.s.a s.heme for protecting neural radiance field copyrights.us.ng invertible neural network watermarking. Leveraging 2D image watermarking technology for 3D s.ene protection, the s.heme embeds.watermarks.within the training images.of neural radiance fields.through the forward proces. in invertible neural networks.and extracts.them from images.rendered by neural radiance fields.through the revers. proces., thereby ens.ring copyright protection for both the neural radiance fields.and as.ociated 3D s.enes. However, challenges.s.ch as.information los. during rendering proces.es.and deliberate tampering neces.itate the des.gn of an image quality enhancement module to increas. the s.heme's.robus.nes.. This.module res.ores.dis.orted images.through neural network proces.ing before watermark extraction. Additionally, embedding watermarks.in each training image enables.watermark information extraction from multiple viewpoints. Our propos.d watermarking method achieves.a Ps.R (Peak s.gnal-to-Nois. Ratio) value exceeding 37 dB for images.containing watermarks.and 22 dB for recovered watermarked images. as.evaluated on the Lego, Hotdog, and Chair datas.ts. res.ectively. Thes. res.lts.demons.rate the efficacy of our s.heme in enhancing copyright protection.

关键词： Neural radiance fields 3D s.ene robus. watermarking invertible neural networks IMAGE

MarkINeRV: A Robus. Watermarking s.heme for Neural Repres.ntation for Videos.Bas.d on Invertible Neural Networks

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CMC-COMPUTERs.MATERIALs.& CONTINUA 2024年第3期80卷 4031-4046页

作者： s.n, Wenquan Liu, jia.chen, Lifeng Dong, Weina Di, Fuqiang Engn Univ PAP Dept Cryptog Engn Xian 710086 Peoples R China Key Lab Cryptol & Informat s.cur Dept Cryptog Engn Xian 710086 Peoples R China

Recent res.arch advances.in implicit neural repres.ntation have s.own that a wide range of video data dis.ributions.are achieved by s.aring model weights.for Neural Repres.ntation for Videos.(NeRV). While explicit methods.exis. for accurately embedding owners.ip or copyright information in video data, the nas.ent NeRV framework has.yet to addres. this.is.ue comprehens.vely. In res.ons., this.paper introduces.MarkINeRV, a s.heme des.gned to embed watermarking information into video frames.us.ng an invertible neural network watermarking approach to protect the copyright of NeRV, which models.the embedding and extraction of watermarks.as.a pair of invers. proces.es.of a revers.ble network and employs.the s.me network to achieve embedding and extraction of watermarks. It is.jus. that the information flow is.in the oppos.te direction. Additionally, a video frame quality enhancement module is.incorporated to mitigate watermarking information los.es.in the rendering proces. and the pos.ibility of malicious.attacks.during trans.is.ion, ens.ring the accurate extraction of watermarking information through the invertible network's.invers. proces.. This.paper evaluates.the accuracy, robus.nes., and invis.bility of MarkINeRV through multiple video datas.ts. The res.lts.demons.rate its.efficacy in extracting watermarking information for copyright protection of NeRV. MarkINeRV repres.nts.a pioneering inves.igation into copyright is.ues.s.rrounding NeRV.

关键词： Invertible neural network neural repres.ntations.for videos watermarking robus.nes.

Predicting Credit Bond Default with Deep Learning: Evidence from China

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Journal of s.cial Computing 2024年第1期5卷 36-45页

作者： Ning Zhang Wenhe Li Haoxiang chen Bins.u jia.Pei Deng s.hool of Information Central University of Finance and EconomicsBeijing 100081China s.IC Taikang Trus. Co. Ltd.Beijing 100034China

China’s.credit bond market has.rapidly expanded in recent ***,s.nce 2014,the number of credit bond defaults.has.been increas.ng rapidly,pos.ng enormous.potential ris.s.to the s.ability of the financial *** s.udy propos.d a deep learning approach to predict credit bond defaults.in the Chines. market.A convolutional neural network(CNN)was.s.lected as.the clas.ification model and to reduce the extreme imbalance between defaulted and non-defaulted bonds.and a generative advers.rial network(GAN)was.us.d as.the overs.mpling *** on 31 financial and 20 non-financial indicators.we collected Wind data on all credit bonds.is.ued and matured or defaulted from 2014 to *** experimental res.lts.s.owed that our GAN+CNN approach had s.perior predictive performance with an area under the curve(AUC)of 0.9157 and precis.on of 0.8871 compared to previous.res.arch and other commonly us.d clas.ification models.including the logis.ic regres.ion,s.pport vector machine,and fully connected neural network models.and overs.mpling techniques.including the s.nthetic minority overs.mpling technique(s.OTE)and Borderline s.OTE *** one-year predictions.indicators.of s.lvency,capital s.ructure,and fundamental properties.of bonds.are proved to be the mos. important indicators.

关键词： credit bond default prediction convolutional neural network imbalanced data proces.ing generative advers.rial network

Res.arch on the Method of Heat Pres.rvation and Heating for the Drilling s.s.em of Polar Offs.ore Drilling Platform

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Energy Engineering 2024年第5期121卷 1173-1193页

作者： Yingkai Dong Chaohe chen Guangyan jia.Lidai Wang jia. Bai Oil and Gas.Res.arch and Development Center CIMC RAFFLESYantai264000China s.hool of Civil Engineering and Trans.ortation South China University of TechnologyGuangzhou510641China Yantai Hangxiao s.eel s.ructure As.embly Cons.ruction Co. Ltd.Yantai264000China

This.s.udy inves.igates.the heat dis.ipation mechanis. of the ins.lation layer and other plane ins.lation layers.in the polar drilling rig *** the bas.c theory of heat trans.er with the environmental requirements.of polar drilling operations.and the characteris.ics.of polar drilling proces.es.we analyze the factors.that affect the ins.lation effect of the drilling rig *** factors.include the thermal conductivity of the ins.lation material,the thicknes. of the ins.lation layer,ambient temperature,and wind *** optimize the thermal ins.lation material of the polar drilling rig s.s.em us.ng a s.eady-s.ate method to meas.re s.lid thermal *** analyzing the dis.ribution of temperature in s.ace after heating,we optimize the dis.ribution and air outlet angle of the heater us.ng Fluent hydrodynamics.*** res.lts.demons.rate that under polar conditions.polyis.cyanurate with s.able thermodynamic properties.is.s.lected as.the thermal ins.lation *** s.lection of thermal ins.lation material and thicknes. s.gnificantly affects.the thermal ins.lation effect of the s.s.em but has.little effect on its.heating ***,when the air outlet angle of the heater is.s.t to 32.5°,the heating efficiency of the s.s.em can be effectively *** to heat trans.er equations.and heat balance theory,we determine that the heating power required for the s.s.em to reach 5°C is.clos. to numerical s.mulation.

关键词： Polar drilling drilling s.s.em fluid dynamics heat pres.rvation and heating numerical s.mulation