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Chemical Research in Chinese Universities 1996年第1期12卷 60-69页

作者： li Ping XIAO Shen-xiu chen tian-lang and li li(Department of Chemistry, Sichuan University, chengdu, 610064) SICHUAN UNIV DEPT CHEMCHENGDU 610064PEOPLES R CHINA

The electronic structures of TIBaCaCuO, BiSrCaCuO and XBaCuO (X = Y,Nd, DY) systems were calculated using DV-Xa method. According to the calculated results, the relationships between electronic structures and supercon... 详细信息

关键词： Superconductor DV-X_α method Populations State densities Energy gap

Synthesis of straight-chain C_(49)H_(100) alkane using a modular splicing strategy

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Journal of Energy Chemistry 2024年第5期92卷 414-421页

作者： Bing Ma Jingqing tian Xueling lang Shutao Lei Bolong li chen Zhao Shanghai Key Laboratory of Green Chemistry and Chemical Processes School of Chemistry and Molecular EngineeringEast China Normal UniversityShanghai 200062China School of Materials Science and Engineering Nankai UniversityTianjin 300350China

Ultra-long n-alkanes are highly valuable in both scientific research and as major constituents of specialty high-melting-point *** conventional methods(e.g.,Fischer–Tropsch(FT),ethylene oligomerization,and polyethylene cracking)typically resulting in wide n-alkane distributions,the elaborate design strategy presented herein allows the direct synthesis of pure,long n-alkanes using a modular splicing method with acetone,furfural,and fatty acid anhydrides or acyl chlorides as *** herein approach is based on a simple four-step catalytic reaction scheme involving C–C chain elongation and C–O bond *** synthesized pure n-alkanes had a carbon chain length as high as C_(49)(total yield of 49%).The synthesis approach also allows to selectively prepare n-alkanes with even and odd carbon numbers ranging from C15 to C_(49).This process represents a great breakthrough in the synthesis of long-chain pure n-alkanes,surpassing the carbon number limitations reported in previous methodologies.

关键词： Straight-chain alkane Aldol condensation F-Cacylation Hydrodeoxygenation

Polyethylene imine functionalized porous carbon framework for selective nitrogen dioxide sensing with smartphone communication

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Chinese Chemical Letters 2024年第9期35卷 432-436页

作者： Xiaxia Xing Xiaoyu chen Zhenxu li Xinhua Zhao Yingying tian Xiaoyan lang Dachi Yang tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology Engineering Research Center of Thin Film Optoelectronics TechnologyMinistry of Education and Department of ElectronicsCollege of Electronic Information and Optical EngineeringNankai UniversityTianjin 300350China

Highly selective and remotely communicable nitrogen dioxide(NO_(2))sensing may contribute to future Internet of Things in environmental ***,room-temperature NO_(2)sensing materials such as carbon materials is still less than satisfactory due to their insensitive interaction with target ***,polyethylene imine functionalized three-dimensional(3D)carbon framework(PEI/C framework)has been developed for enhanced selective NO_(2)sensing,via combined template synthesis and subsequent ***,the 3D PEI/C framework is observed porous shape with irregular ***,the response of C framework to NO_(2)increases while those of interfering gases decrease after being functionalized with ***,the sensor prototypes show a 100 ppb-concentration detection limit at room ***,such excellent NO_(2)sensing is attributed to the large specific surface ratio of porous 3D PEI/C framework,in which PEI serves as an active layer for target NO_(2),while a passivated one for interfering ***,such PEI/C framework sensor prototype is simulated for NO_(2)sensing device and communicated with a smartphone,showing great potential in future intelligent environmental monitoring.

关键词： PEI/C framework Nitrogen dioxide sensing Enhanced selectivity Smartphone communication Practical monitoring simulation

Tensile strength behavior of cement-stabilized dredged sediment reinforced by polypropylene fiber

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Frontiers of Structural and Civil Engineering 2024年第3期18卷 380-392页

作者： Lei lang Jiangshan li Xin chen lijun HAN Ping WANG State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicChinese Academy of SciencesWuhan 430071China Hubei Provincial Key Laboratory of Contaminated Sludge and Soil Science and Engineering Wuhan 430071China University of Chinese Academy of Sciences Beijing 100049China

This study evaluated the feasibility of using polypropylene fiber(PF)as reinforcement in improving tensile strength behavior of cement-stabilized dredged sediment(CDS).The effects of cement content,water content,PF content and length on the tensile strength and stress–strain behavioral evolutions were evaluated by conducting splitting tensile strength ***,the micro-mechanisms characterizing the tensile strength behavior inside PF-reinforced CDS(CPFDS)were clarified via analyzing macro failure and microstructure *** results indicate that the highest tensile strengths of 7,28,60,and 90 d CPFDS were reached at PF contents of 0.6%,1.0%,1.0%,and 1.0%,exhibiting values 5.96%,65.16%,34.10%,and 35.83%higher than those of CDS,***,3 mm,PF of showed the best reinforcement *** CPFDS exhibited obvious tensile strain-hardening characteristic,and also had better ductility than *** mix factor(C_(C)^(a)/C_(w)^(b))and time parameter(q_(t0)(t))of CDS,and the reinforcement index(k_(t-PF))of CPFDS were used to establish the tensile strength prediction models of CDS and CPFDS,considering multiple *** PF“bridge effect”and associated cementation-reinforcement coupling actions inside CPFDS were mainly responsible for tensile strength behavior *** key findings contribute to the use of CPFDS as recycled engineering soils.

关键词： dredged sediment chemical stabilization fiber reinforcement splitting tensile strength micro-mechanisms

Additives strategies to improving cycling stability of li metal batteries by modifying electrode electrolyte interphases

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Progress in Natural Science:Materials International 2024年第2期34卷 338-344页

作者： Yuan li Pengfei Huang Chunyu Cui Xiaoyuan Ma li chen Zekun li linhai li Yuhong tian School of Biological and Chemical Engineering Guangxi University of Science and Technology School of College of Chemistry and Chemical Engineering Hunan University Isky Future Energy Institute

li metal batteries（LMBs） have attracted much attention due to the ultra-high theoretical capacity of the li metal anode（LMA）.However,the uncontrollable dendrites growth and low coulombic efficiency hinder their practical ***,we explore 3,5-difluoropyridine（2F-BD） as a novel electrolyte additive to enable highperformance *** 2F-BD additive participates in and modifies the solvation structure of li ions by reducing the coordinated number of PF6-at the electrode surface,leading to the formation of a liF and li3N-rich solid electrolyte interphase（SEI）.The liF component increases the robustness of SEI and suppresses the formation of li dendrites,while the li3N component facilitates the transportation and reaction kinetics of li *** a result,the li‖li symmetric cell presents a stable cycling performance of up to 500 h at a current density of 1 mA *** coupling with liFePO4cathode,the obtained full cell achieves high specific capacities of 106.06 mA h g-1and 84.98 mA h g-1at 2.55 mA cm-2and 5.10 mA cm-2,respectively,and maintains a high capacity retention of84.0% after 1000 cycles at 0.13 mA cm-2,with an average cycling CE of 99.58%.

关键词： Electrolyte additive li dendrites li metal batteries liF and li3N-Rich electrode-electrolyte interphase liFePO4 cathode

Detection of Oscillations in Process Control Loops From Visual Image Space Using Deep Convolutional Networks

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IEEE/CAA Journal of Automatica Sinica 2024年第4期11卷 982-995页

作者： Tao Wang Qiming chen Xun lang Lei Xie Peng li Hongye Su the Department of Electronic Engineering the School of InformationYunnan UniversityKunming 650091China DAMO Academy Alibaba GroupHangzhou 311100China the State Key Laboratory of Industrial Control Technology Institute of Cyber-Systems and ControlZhejiang UniversityHangzhou 310027China

Oscillation detection has been a hot research topic in industries due to the high incidence of oscillation loops and their negative impact on plant *** numerous automatic detection techniques have been proposed,most of them can only address part of the practical *** oscillation is heuristically defined as a visually apparent periodic ***,manual visual inspection is labor-intensive and prone to missed *** neural networks(CNNs),inspired by animal visual systems,have been raised with powerful feature extraction *** this work,an exploration of the typical CNN models for visual oscillation detection is ***,we tested MobileNet-V1,ShuffleNet-V2,Efficient Net-B0,and GhostNet models,and found that such a visual framework is well-suited for oscillation *** feasibility and validity of this framework are verified utilizing extensive numerical and industrial *** with state-of-theart oscillation detectors,the suggested framework is more straightforward and more robust to noise and *** addition,this framework generalizes well and is capable of handling features that are not present in the training data,such as multiple oscillations and outliers.

关键词： Convolutional neural networks(CNNs) deep learning image processing oscillation detection process industries

li_(2)ZnTi_(3)O_(8)as the host–separator modifier with efficient polysulfides trapping and fast li^(+)diffusion for lithium-sulfur batteries

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Nano Research 2024年第7期17卷 6087-6094页

作者： Mao Qian Yakun Tang lang liu Yue Zhang Xiaohui li JiaJia chen State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources Xinjiang UniversityUrumqi 830017China State Key Laboratory of Physical Chemistry of Solid Surfaces Xiamen UniversityXiamen 361005China

The diffusion and loss of lithium polysulfides(liPSs)in lithium-sulfur batteries(LSBs)reduce the sulfur utilization rate and the catalytic conversion efficiency of sulfur species,resulting in early battery ***_(2)ZnTi_(3)O_(8)(LZTO),characterized by its stable spinel structure,exhibits high li+conductivity and holds great potential as an effective adsorbent for *** study proposes a collaborative design concept of LZTO host–separator modifier,which offers a complementary and matching approach in the cathode side,effectively addressing the challenges associated with dissolution and inadequate conversion of *** functional theory(DFT)calculation substantiates the pronounced chemical affinity of LZTO towards *** importantly,the high efficiency ion transport channels are achieved in separator coating due to the presence of the LZTO ***,the catalytic efficacy of LZTO is validated through meticulous analysis of symmetric batteries and Tafel ***,the LZTO host–separator modifier-based cell displays satisfactory rate capability(1449 and 1166 mAh·g^(−1)at 0.1 and 0.5 C)and an impressively capacity(606 mAh·g^(−1)after 500 cycles at 1 C).The coordinated strategy of host–separator modifier is supposed to have wide applications in LSBs.

关键词： li_(2)ZnTi_(3)O_(8) lithium-sulfur batteries host-separator modifier catalytic conversion diffusion and loss of liPSs

Polyphenol components in black chokeberry(Aronia melanocarpa)as clinically proven diseases control factors——an overview

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Food Science and Human Wellness 2024年第3期13卷 1152-1167页

作者： Ningxuan Gao Chi Shu Yuehua Wang Jinlong tian Yuxi lang chenyu Jin Xingyue Cui Hanqian Jiang Shi’an liu Zhiying li Wei chen Hao Xu Bin li Department of Food Science College of FoodShenyang Agricultural UniversityShenyang 110161China Department of Food Science and Nutrition College of Biosystems Engineering and Food ScienceZhejiang UniversityHangzhou 310058China Chaoyang Beihe Food Co. Ltd.Chaoyang 122100China

The black chokeberry is rich in polyphenols,including flavonoids with anthocyanins,flavanols and lavonols as the main components and a variety of phenolic acids represented by chlorogenic *** of these polyphenols,black chokeberry has the effect of preventing and adjuvant therapy *** study summarized the current research results on the types and contents of functional components in black chokeberry,and analyzed their digestion,absorption and metabolism in human *** this basis,the disease control functions that have been proved effective in clinical research were reviewed and *** studies showed that black chokeberry have good prevention and adjuvant therapy effects on hyperlipidemia,hypertension,diabetes and *** there are different functional components in black chokeberry,its prevention and treatment of the same disease can come from multiple pathways,which provides a more reliable effectiveness for the disease control of different populations.

关键词： Black chokeberry Hyperlipidemia Hypertension Diabetes Inflammation

Yuzaoea gen. nov., a new biraphid diatom(Bacillariophyceae)genus and its phylogenetic significance

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Acta Oceanologica Sinica 2024年第2期43卷 130-136页

作者： Honghan liu chenhong li lang li Xuesong li lin Sun Junrong liang Jun Zhang Yahui Gao Changping chen Key Laboratory of Ministry of Education for Coastal and Wetland Ecosystems and School of life Sciences Xiamen UniversityXiamen 361102China State Key Laboratory of Marine Environmental Science Xiamen UniversityXiamen 361102China Guangxi Key Laboratory of Marine Environmental Science Guangxi Academy of Marine SciencesGuangxi Academy of SciencesNanning 530007China Beibu Gulf Marine Industry Research Institute Fangchenggang 538000China

The flexed frustules in pennate diatoms are usually associated with monoraphid diatoms. Interestingly, we found a biraphid diatom species with flexed frustules in an offshore intertidal beach environment on Weizhou Island,Beihai City, Guangxi Zhuang Autonomous Region, China. Therefore, based on morphological characteristics, we described a new genus of diatoms Yuzaoea sinensis gen. et sp. nov. CH li, HH liu, YH Gao & CP chen. The frustule of this genus is characterized by heterogeneous frustule with one concave valve and one convex valve,complete raphe on both valves, straight and moderately eccentric raphe, uniseriate striae and girdle bands with a single row of areolae. The most identifying feature of this genus was the flexed frustule, which is rare in biraphid diatoms and common in monoraphid diatoms. We compared the morphometric characteristics of genus Yuzaoea with genus Rhoikoneis and several genera within the family Rhoicospheniaceae, including Rhoicosphenia,Campylopyxis, and Cuneolus. Phylogenetic analyses based on SSU rRNA and rbc L showed that the genus Yuzaoea was the sister group to the clade of Rhoicosphenia with a high support value(bootstrap values = 100%), and the clade “Yuzaoea+Rhoicosphenia” was sister to the clade of monoraphid diatoms, in which the genera Achnanthidium, Planothidium and some Cocconeis with high support values(bootstrap = 100%).Morphologically, the genus Yuzaoea shares many morphological features with monoraphid diatoms like genera Achnanthidium and Planothidium and the members within the Rhoicospheniaceae. Therefore, based on a combined morphological studies and phylogenetic results we suggested that this branch may represented the evolution of one kind monoraphid diatoms, from biraphid diatoms(e.g. genus Yuzaoea), to incompleted biraphid diatoms(e.g. genera Rhoicosphenia, Campylopyxis), to monoraphid diatoms(e.g. genera Achnanthidium and Planothidium).

关键词： biraphid diatom marine new genus Rhoicospheniaceae taxonomy Yuzaoea

Piezoelectric Drop-on-Demand Inkjet Printing with Ultra-High Droplet Velocity

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Research 2024年第3期2023卷 123-137页

作者： Zhengjie Yang Hongmiao tian Chunhui Wang Xiangming li Xiaoliang chen Xiaoming chen Jinyou Shao State Key Laboratory for Manufacturing Systems Engineering Xi’an Jiaotong UniversityXi’anShaanxi 710049China Frontier Institute of Science and Technology(FIST) Xi’an Jiaotong UniversityXi’anShaanxi 710049China.

Improving droplet velocity as much as possible is considered as the key to improving both printing speed and printing distance of the piezoelectric drop-on-demand inkjet printing *** are 3 tough and contradictory issues that need to be addressed simultaneously,namely,the actuation pressure of the piezoelectric printhead,satellite droplets,and the air resistance,which seems almost impossible to achieve with classical ***,a novel solution is *** modulating the positive crosstalk effect inside and outside the printhead,self-tuning can be achieved,including self-reinforcing of the actuation pressure,self-restraining of satellite droplets,and self-weakening of the air resistance,thereby greatly improving droplet *** on these mechanisms,waveform design methods for different inks and printheads are *** results demonstrate that monodisperse droplet jetting with a maximum velocity of 27.53 m/s can be achieved,reaching 3 to 5 times that of the classical method(5 to 8 m/s).Correspondingly,the printing speed and distance can be simultaneously increased by almost 10 times,demonstrating an ability of direct printing on irregular ***,the compatibility of ink materials is expanded,as the Ohnesorge number and the viscosity of printable inks for the printhead used are increased from 0.36–0.72 to 0.03–1.18 and from 10–12 cp to 1–40.3 cp,respectively,even breaking the traditional limitations of the piezoelectric printing technology(Ohnesorge number of 0.1 to 1;viscosity of 1 to 25 cp).All the above provide a new perspective for improving droplet velocity and may even offer a game-changing choice for expanding the boundaries of the piezoelectric drop-on-demand inkjet printing technology.

关键词： piezoelectric viscosity thereby