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chinese chemical Letters 2024年第10期35卷 254-258页

作者： Zhaohong c.en Mengzhen Li Jinfei Lan Shengqian hu Xiaogang c.en Ordered Matter Sc.ence Research center Nanchang University

Molecular-based ferroelastics with dielectric switching properties are highly desirable for their applications on microelectronic dielectric switches,sensors,data storage,and so ***,the current reports mostly focus on organic-inorganic hybrids containing toxic heavy metal atoms,and the relatively low phase transition temperature limits their *** this paper,low-toxic organic salt ferroelastic.enantiomers （R/S）-4-fluoro-1-azabicyclo[3.2.1]octonium chloride[（R/S）-F-321]were designed and synthesized under the introducing chirality *** undergo a 432F422-type ferroelastic phase transition with a high curie temperature （Tc） of 470 K,simultaneously exhibiting excellent dielectric switching *** addition to the ordered-disordered movement of cations,the significant displacement of anions is also responsible for such high Tcand large dielectric switching ratios,which is very rare in molecular-based switching *** work enriches the development of molecular ferroelastic switching materials and gives inspiration for the exploration of environmentally friendly high Tcorganic salt ferroelastics with prominent switching performances.

关键词： Dielectric switching enantiomers Ferroelastic Organic salt Phase transition

Noise-Tolerant ZNN-Based Data-Driven Iterative Learning control for Discrete Nonaffine Nonlinear MIMO Repetitive Systems

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IEEE/cAA Journal of Automatica Sinica 2024年第2期11卷 344-361页

作者： Yunfeng hu chong Zhang Bo Wang Jing Zhao Xun Gong Jinwu Gao Hong c.en State Key Laboratory of Automotive Simulation and control Jilin UniversityJilin UniversityChangchun 130025China college of communication engineering Jilin UniversityJilin UniversityChangchun 130025China Department of Electromechanical engineering University of MacaoMacao 999078China School of Artificial Intelligence Jilin UniversityChangchun 130012China IEEE college of Electronics and Information engineering Tongji UniversityShanghai 200092China

Aiming at the tracking problem of a class of discrete nonaffine nonlinear multi-input multi-output(MIMO) repetitive systems subjected to separable and nonseparable disturbances, a novel data-driven iterative learning control(ILc) scheme based on the zeroing neural networks(ZNNs) is proposed. First, the equivalent dynamic linearization data model is obtained by means of dynamic linearization technology, which exists theoretically in the iteration domain. Then, the iterative extended state observer(IESO) is developed to estimate the disturbance and the coupling between systems, and the decoupled dynamic linearization model is obtained for the purpose of controller synthesis. To solve the zero-seeking tracking problem with inherent tolerance of noise,an ILc based on noise-tolerant modified ZNN is proposed. The strict assumptions imposed on the initialization conditions of each iteration in the existing ILc methods can be absolutely removed with our method. In addition, theoretical analysis indicates that the modified ZNN can converge to the exact solution of the zero-seeking tracking problem. Finally, a generalized example and an application-oriented example are presented to verify the effectiveness and superiority of the proposed process.

关键词： Adaptive control control system synthesis data-driven iterative learning control neurocontroller nonlinear discrete time systems

A clinical trial termination prediction model based on denoising autoencoder and deep survival regression

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Quantitative Biology 2024年第2期12卷 205-214页

作者： huamei Qi Wenhui Yang Wenqin Zou Yuxuan hu School of Electronic Information Central South UniversityChangshaHunanChina School of computer Sc.ence and engineering Central South UniversityChangshaHunanChina

Effective clinical trials are necessary for understanding medical advances but early termination of trials can result in unnecessary waste of *** models can be used to predict survival probabilities in such ***,survival data from clinical trials are sparse,and DeepSurv cannot accurately capture their effective features,making the models weak in generalization and decreasing their prediction *** this paper,we propose a survival prediction model for clinical trial completion based on the combination of denoising autoencoder(DAE)and DeepSurv *** DAE is used to obtain a robust representation of features by breaking the loop of raw features after autoencoder training,and then the robust features are provided to DeepSurv as input for *** clinical trial dataset for training the model was obtained from the *** dataset.A study of clinical trial completion in pregnant women was conducted in response to the fact that many current clinical trials exclude pregnant *** experimental results showed that the denoising autoencoder and deep survival regression(DAE-DSR)model was able to extract meaningful and robust features for survival analysis;the c-index of the training and test datasets were 0.74 and 0.75 *** with the cox proportional hazards model and DeepSurv model,the survival analysis curves obtained by using DAE-DSR model had more prominent features,and the model was more robust and performed better in actual prediction.

关键词： clinical trials denoising autoencoder DeepSurv experimental termination survival analysis

Versatile MXene Gels Assisted by Brief and Low‑Strength centrifugation

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Nano-Micro Letters 2024年第5期16卷 231-247页

作者： Weiyan Yu Yi Yang Yunjing Wang Lulin hu Jingc.eng Hao Lu Xu Weimin Liu State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000People’s Republic of China Shandong Laboratory of Advanced Materials and Green Manufacturing at Yantai Yantai 264006People’s Republic of China Key Laboratory of colloid and Interface chemistry and Key Laboratory of Special Aggregated Materials Shandong UniversityJinan 250100People’s Republic of China

Due to the mutual repulsion between their hydrophilic surface terminations and the high surface energy facilitating their ran-dom restacking,2D MXene nanosheets usually cannot self-assemble into 3D macroscopic gels with various applications in the absence of proper linking *** this work,a rapid spontaneous gelation of Ti3c2Tx MXene with a very low dispersion concentration of 0.5 mg mL^(-1) into multifunctional architectures under moderate centrifugation is *** as-prepared MXene gels exhibit reconfigurable internal structures and tunable rheological,tribological,electrochemical,infrared-emissive and photothermal-conversion properties based on the pH-induced changes in the surface chemistry of Ti_(3)c_(2)T_(x) *** adopting a gel with optimized pH value,high lubrication,exceptional specific capacitances(~635 and~408 F g^(-1) at 5 and 100 mV s^(-1),respectively),long-term capacitance retention(~96.7%after 10,000 cycles)and high-precision screen-or extrusion-printing into different high-resolution anticounterfeiting patterns can be achieved,thus displaying extensive potential applications in the fields of semi-solid lubrication,control-lable devices,supercapacitors,information encryption and infrared camouflaging.

关键词： MXene centrifugation-assisted rapid gelation Lubrication Supercapacitor Anti-counterfeiting applications

enhancement of low-temperature toughness of Fe-Mn-c-Al alloy by rare earth ce-modified inclusions

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Journal of Iron and Steel Research International 2024年第1期31卷 157-173页

作者： Guang-kai Yang chang-ling Zhuang Yi-zhuang Li c.en hu Shao-bo Li college of Materials and Metallurgy Guizhou UniversityGuiyang550025GuizhouChina Department of Mechanical engineering University of Hong KongHong Kong999077China The State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang110819LiaoningChina State Key Laboratory of Public Big Data Guizhou UniversityGuiyang550025GuizhouChina

Fe-Mn-c-Al alloys have been recognized as promising materials for certain low-temperature applications due to their exceptional mechanical properties and ***,their limited low-temperature toughness restricts their large-scale applications in specific *** influence of trace amounts of rare earth cerium(ce)on the low-temperature toughness of Fe-18Mn-0.6c-1.8Al alloys was *** addition of ce effectively alters the inclu-sions in the alloy,transforming large-sized irregular inclusions into fine ellipsoidal rare earth *** leads to a significant reduction in both the proportion and average size of the inclusions,resulting in their effective dispersion throughout the matrix and improved cryogenic *** presence of ce-containing inclusions within the matrix reduces stress concentration,thereby inhibiting microcrack formation and improving impact absorption ***-cally,the addition of rare earth ce alters the fracture behavior of the material at room temperature and low temperature,changing from brittle cleavage fracture to a more ductile failure *** impact toughness of the Fe-Mn-c-Al alloy is significantly improved by the addition of 0.0048 wt.%ce,particularly at-196℃where the impact toughness reaches 103.6 J/cm^(2),representing an impressive improvement of 87.3%.

关键词： Fe-Mn-c-Al alloy Rare earth Low-temperature toughness Inclusion Fracture

Asymmetric configuration activating lattice oxygen via weakening d-p orbital hybridization for effic.ent c/N separation in urea overall electrolysis

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Journal of energy chemistry 2024年第5期92卷 233-239页

作者： chongchong Liu Peifang Wang Bin hu Xiaoli Liu Rong huang Gang Zhou Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education College of EnvironmentHohai UniversityNanjing 210098JiangsuChina

Urea oxidation reaction(UOR)is proposed as an exemplary half-reaction in renewable energy applications because of its low thermodynamical ***,challenges persist due to sluggish reaction kinetics and complex by-products *** this end,we introduce the lattice oxygen oxidation mechanism(LOM),propelling a novel UOR route using a modified coFe layered double hydroxide(LDH)catalyst termed *** calculations and in-situ characterizations highlight the activated lattice oxygen(O_(L))within cFRO-7 as pivotal sites for UOR,optimizing the reaction pathway and accelerating the *** the urea overall electrolysis application,the LOM route only requires a low voltage of 1.54 V to offer a high current of 100 mA cm^(-2) for long-term utilization(>48 h).Importantly,the by-product NcO^(-)−is significantly suppressed,while the cO_(2)2/N_(2) separation is effic.ently *** work proposed a pioneering paradigm,invoking the LOM pathway in urea electrolysis to expedite reaction dynamics and enhance product selectivity.

关键词： Lattice oxygen Urea oxidation reaction Overall electrolysis Products selectivity

Photothermal catalytic c-c coupling to ethylene from cO_(2) with high effic.ency by synergistic cooperation of oxygen vacancy and half-metallic WTe_(2)

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Journal of energy chemistry 2024年第6期93卷 547-556,I0014页

作者： Xiaoyue Zhang Yong Yang Yingjie hu Lijun Xiong Tianyu Wang Panjie Li Jinyou Shen Key Laboratory of environmental Remediation and Ecological Health Ministry of Industry and Information TechnologySchool of Environmental and Biological EngineeringNanjing University of Science and TechnologyNanjing 210094JiangsuChina School of chemistry and chemical engineering Nanjing University of Science and TechnologyNanjing 210094JiangsuChina Nanjing Key Laboratory of Advanced Functional Materials Nanjing Xiaozhuang UniversityNanjing 210094JiangsuChina Jiangsu environmental engineering Technology co.Ltd Nanjing 210019JiangsuChina

Photothermal catalytic cO_(2) conversion provides an effective solution targeting carbon neutrality by synergistic utilization of photon and ***,the c-c coupling initiated by photothermal catalysis is still a big ***,a three-dimensional(3D)hierarchical W_(18)O_(49)/WTe_(2) hollow nanosphere is constructed through in-situ embodying of oxygen vacancy and tellurium on the scaffold of WO_(3).The light absorption towards near-infrared spectral region and cO_(2) adsorption are enhanced by the formation of half-metal WTe_(2) and the unique hierarchical hollow *** with the generation of oxygen vacancy with strengthened cO_(2) capture,the photothermal effect on the samples can be suffic.ently exploited for activating the cO_(2) *** particular,the close contact between W_(18)O_(49)and WTe_(2) largely promotes the photoinduced charge separation and mass transfer,and thus the~*cHO intermediate formation and fixedness are *** a result,the c-c coupling can be evoked between tungsten and tellurium atoms on WTe_(2).The ethylene production by optimized W_(18)O_(49)/WTe_(2) reaches 147.6μmol g^(-1)with the selectivity of 80%.The in-situ diffuse reflectance infrared Fourier transform spectroscopy(DRIFTS)and density functional theory(DFT)calculations are performed to unveil the presence and significance of aldehyde intermediate groups in c-c *** half-metallic WTe_(2) cocatalyst proposes a new approach for effic.ent cO_(2) conversion with solar energy,and may especially create a new platform for the generation of multi-carbon products.

关键词： Photothermal catalysis Half-metal WTe_(2) c–c coupling carbon neutrality

A small organic molecule strategy for remedying oxygen vacancies by bismuth defects in BiOBr nanosheet with excellent photocatalytic cO_(2)reduction

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Nano Research 2024年第1期17卷 297-306页

作者： Jing Xie Zhenjiang Lu Yue Feng Jianguo huang Jindou hu Aize Hao Yali cao State Key Laboratory of chemistry and Utilization of carbon Based energy Resources College of ChemistryXinjiang UniversityUrumqi 830046China

Defect modulation currently plays a decisive role in addressing the poor photoabsorption,sluggish electron hole separation,and high cO_(2)activation barrier in photocatalytic cO_(2)***,hunting for a straightforward strategy to balance the concentration of oxygen vacancy and metal cation defect in one photocatalyst is still a great ***,a bismuth vacancies BiOBr nanosheets(BiOBr-1)on the exposed[001]facets were constructed via an acetic acid molecule modification strategy,which can repair oxygen defect by bismuth vacancy in low-temperature solid-state chemical *** from the formed bismuth defects that can not only broaden light absorption and elevate charge separation effic.ency,but also enhance adsorption and activation of cO_(2)molecules,the evolution rates of photocatalytic cO_(2)conversion into cO(71.23μmol·g^(-1)·h^(-1))and cH4(8.90μmol·g^(-1)·h^(-1))attained by BiOBr-1 are superior 7.1 and 11 times to that of plate-like *** photocatalytic mechanisms including adsorption concentration and activation process of cO_(2)are further revealed by the in situ diffuse reflectance infrared flourier transform spectra(DRIFTS).This finding of the existence of distinct defects in ultrathin nanosheets undoubtedly leads to new possibilities for photocatalyst design using two-dimensional materials with high solar-driven photocatalytic activity.

关键词： solid-state synthesis BiOBr metal vacancies photocatalysis carbon dioxide reduction

Ultrafine nano-copper derived from dopamine polymerization&synchronous adsorption achieve electrochemical purification of nitrate to ammonia in complex water environments

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chinese chemical Letters 2024年第8期35卷 383-390页

作者： Xue Zhao Mengshan c.en Dan Wang Haoran Zhang Guangzhi hu Yingtang Zhou Faculty of chemistry and chemical engineering Yunnan Normal UniversityKunming 650092China National engineering Research center for Marine Aquaculture Marine Science and Technology CollegeZhejiang Ocean UniversityZhoushan 316004China college of chemistry Nankai University Nankai UniversityTianjing 300071China Institute for Ecological Research and Pollution control of Plateau Lakes School of Ecology and Environmental ScienceYunnan UniversityKunming 650504China

Electrochemical-nitrate-reduction-reaction(enitRR)synthesis of ammonia is an effective way to treat ni-trate wastewater and alleviate the pressure of the Haber-Bosch ammonia production *** to develop effective catalysts to electrochemically reduce nitrate to ammonia and purify sewage under com-plex environmental conditions is the focus of current ***,the dopamine polymerization pro-cess and the[(c_(12)H_(8)N_(2))_(2)cu]^(2+)complex embedding process were run simultaneously in time and space,and ultrafine cu nanoparticles(cu/cN)were effectively loaded on nitrogen-doped carbon after heat *** cu/cN as the catalyst,the ammonia yield rate and Faradaic effic.ency of the electrochemical conversion of NO_(3)^(-)to NH_(3)are highly 8984.0μg h^(−1)mg cat.^(−1)and 95.6%,*** in the face of complex water environments,such as neutral media,acidic media,coexisting ions,and actual nitrate wastewater,nitrate wastewater can be effectively purified to form high value-added *** strat-egy of simultaneous embedding increases the exposure rate of cu sites,and the support of cN is also beneficial to reduce the energy barrier of ^(∗)NO_(3)*** study rationally designed catalysts that are beneficial to enitRR,and considered the situation faced by practical applications during the research stage,reducing the performance gap between laboratory exploration and industrial applications.

关键词： Electrochemical nitrate reduction reaction Synthetic ammonia Sewage treatment Nano copper Dopamine

High-chromium vanadium-titanium magnetite all-pellet integrated burden optimization and softening-melting behavior based on flux pellets

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International Journal of Minerals,Metallurgy and Materials 2024年第3期31卷 498-507页

作者： Bojian c.en Tao Jiang Jing Wen Guangdong Yang Tangxia Yu Fengxiang Zhu Peng hu School of Metallurgy Northeastern UniversityShenyang 110819China Key Laboratory for Ecological Metallurgy of Multimetallic Mineral(Ministry of Education) Northeastern UniversityShenyang 110819China Liaoning Key Laboratory for Metallurgical Sensor and Technology Shenyang 110819China State key laboratory of vanadium and titanium resources comprehensive utilization Panzhihua 617000China

High-chromium vanadium-titanium magnetite(HVTM)is a crucial polymetallic-associated resource to be *** allpellet operation is a blast furnace trend that aims to reduce carbon dioxide emissions in the *** referencing the production data of vanadium-titanium magnetite blast furnaces,this study explored the softening-melting behavior of high-chromium vanadium-titanium magnetite and obtained the optimal integrated burden based on flux *** results show that the burden with a composition of 70wt%flux pellets and 30wt%acid pellets exhibits the best softening-melting *** comparison to that of the single burden,the softening-melting characteristic temperature of this burden composition was *** melting interval first increased from 307 to 362℃and then decreased to 282℃.The maximum pressure drop(ΔPmax)decreased from 26.76 to 19.01 *** permeability index(S)dropped from 4643.5 to 2446.8 kPa·℃.The softening-melting properties of the integrated burden were apparently *** acid pellets played a role in withstanding load during the softening *** flux pellets in the integrated burden exhibited a higher slag melting point,which increased the melting temperature during the melting *** slag homogeneity and the Tic produced by over-reduction led to the gas permeability deterioration of the single *** segregation of the flux and acid pellets in the HVTM proportion and basicity mainly led to the better softening-melting properties of the integrated burden.

关键词： high-chromium vanadium-titanium magnetite softening-melting properties all pellets integrated burden flux pellets