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Copper slag assisted coke reduction of phosphogypsum for sulphur dioxide preparation

Chinese Journal of Chemica. Engineering 2024年第1期65卷 43-53页

作者： dong Ma Qinhui Wang State Key Laboratory of Clean Energy Utilization Institute for Thermal Power EngineeringZhejiang UniversityHangzhou 310027China

The reduction of phosphogypsum(PG)to lime slag and SO_(2)using coke ca. effectively alleviate the environmental problems ca.sed by ***,the PG decomposition temperature remains high and the product yield remains *** adding additives,the decomposition temperature ca. be further reduced and PG decomposition rate and product yield ca. be ***,the use of current additives such as Fe_(2)O_(3)and SiO_(2)brings the problem of increasing economic ***,it is proposed to use solid waste copper slag(CS)as a new additive to reduce PG to prepare SO2,which ca. reduce the cost and meet the environmental benefits at the same *** effects of proportion,temperature and thermostatic time on PG decomposition are investigated by experimental and kinetic analysis combined with FactSage thermodynamic ca.culations to optimize the roasting ***,the reaction mechanism is *** is found that adding CS to the coke and PG system ca. increase the rate of PG decomposition and SO_(2)yield while lowering the PG decomposition *** example,when the CS/PG mass ratio increases from 0 to 1,PG decomposition rate increases from 83.38%to 99.35%,SO_(2)yield increases from 78.62%to 96.81%,and PG decomposition temperature decreases from 992.4℃to 949.6℃.The optimal reaction parameters are CS/PG mass ratio of 1,Coke/PG mass ratio of 0.06 at 1100℃for 20 min with 99.35%PG decomposition rate and 96.81%SO_(2) *** process proceeds according to the following reactions:2ca.O_(4)+ 0.7C + 0.8Fe_(2)SiO_(4)→0.8ca.(2)SiO_(4)+ 0.2ca.(2)Fe_(2)O_(5)+ 0.4Fe_(3)O_(4)+2SO_(2)+ 0.7CO_(2)Finally,a process for decomposing PG with coke and CS is proposed.

关键词： Phosphogypsum Sulfur dioxide Copper slag Fluidized-bed Reduction Waste treatment

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2D ca.Nb-based perovskite oxide with Ta doping as highly efficient H_(2)O_(2)synthesis ca.alyst

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Nano Research 2024年第6期17卷 4934-4942页

作者： Xingchen Yang Yang Gao Xiaohui Xu Wenqiang Xu Denghui Wang Bin Luo dong Liu Tao Liang Bin Wang ca. Key Laboratory of Nanosystem and Hierarchica. Fabrica.ion National Center for Nanoscience and TechnologyBeijing 100190China University of Chinese Aca.emy of Sciences Beijing 100049China Nanomaterials Centre School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnologythe University of QueenslandSt LuciaQLD 4072Australia State Key Laboratory of Organic–Inorganic Composites College of Chemical EngineeringCollege of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029China Hangzhou Institute for Advanced Study University of Chinese Academy of SciencesHangzhou 310024China State Key Lab of Silicon Materials Zhejiang UniversityHangzhou 310027China

Perovskite oxides(POs)are emerging as a class of highly efficient ca.alysts for reducing oxygen to H_(2)*** a rich variety of POs-based ca.alysts have been developed by tuning the complex composition,a highly efficient PO ca.alyst that is able to alter the reaction pathway from a 4e−process to a 2e−process for H_(2)O_(2)production has rarely been *** modified the structure and composition of a ca.and Nb-based PO material by realizing a uniform two-dimensional(2D)morphology and varied Ta doping,resulting in the 2D ca.(2)Nb_(3−x)Ta_(x)O_(10)−(x=0,0.5,1,and 1.5)monolayer *** obtained ca.alysts exhibit a dominant 2e−pathway and show exceptional H_(2)O_(2)production *** typica. ca.(2)Nb_(2.5)Ta_(0.5)O_(10)−nanoflakes showed an onset potential of 0.735 V *** hydrogen electrode(RHE),a remarkably high selectivity over 95%across a wide range of 0.3-0.7 V,an impressively high Faradaic efficiency of 94%,and a notable H_(2)O_(2)productivity of 1571 mmol·gca.^(−1)·h^(−1).These findings highlight the great potential of 2D perovskite oxide nanoflakes as advanced electroca.alysts for 2e−oxygen reduction reaction.

关键词： perovskite oxide H_(2)O_(2) two-electron oxygen reduction reaction ca.alyst ca.(2)Nb_(3-x)Ta_(x)O_(10)-nanoflakes

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Tri-axial accelerometry allows to determine parental food provisioning behaviour in a marine bird

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Avian Research 2024年第3期15卷 345-351页

作者： Monserrat Del ca.o Flavio Quintana Giacomo Dell’Omo Agustina Gómez-Laich Instituto de Biología de Organismos Marinos(IBIOMAR) CONICETBoulevard Brown 2915U9120ACDPuerto MadrynChubutArgentina Ornis Italica Piazza Crati 1500199RomeItaly Departamento de Ecología Genética y Evolución(EGE)and Instituto de EcologíaGenética y Evolución de Buenos Aires(IEGEBA)CONICETFacultad de CienciasExactas y NaturalesUniversidad de Buenos AiresPabellón II Ciudad UniversitariaC1428EGACiudad Autónoma de Buenos AiresArgentina

The study of parental food provisioning is essential for understanding the breeding ecology of *** conducted the first study using accelerometry to detect food provisioning in birds,using Support Vector Machine(SVM)models to identify when adults feed chicks of three different age *** were attached to the head of adult female Imperial Shags(Leucoca.bo atriceps),and various attributes derived from the acceleration signals were used to train SVM models for each chick age *** performance improved with chick age class,with SVM models achieving high overall accuracy(>88%)and highest sensitivity in older chick ca.egories(>91%).However,precision values,especially for younger chicks,remained relatively low(between 26%and 45%).The applica.ion of a time filter based on the minimum duration of the observed food provisioning behaviours for each chick age ca.egory,improved model performance by reducing false provisioning behaviours,particularly in the model for older chicks,which showed the highest precision(72.4%).This study highlights the effectiveness of accelerometry and machine learning in studying parental food provisioning in birds,providing a rapid and accurate data collection method to complement traditional *** described methodology ca. be applied to any bird species that exhibits distinctive movements while feeding its offspring and has suitable characteristics for attaching an accelerometer to the body part that best ca.tures this ***,it is hoped that the results of this study will contribute to future research on key questions in parental investment theory and reproductive strategies in birds.

关键词： Accelerometry Food provisioning Imperial shag Leucoca.bo atriceps Seabird Support vector machine

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Game changer:How Janus kinase inhibitors are reshaping the landsca.e of ulcerative colitis mana

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World Journal of Gastroenterology 2024年第35期30卷 3942-3953页

作者： Antonio M ca.allero-Mateos Guillermo Arturo ca.adas-de la Fuente Department of Gastroenterology and Hepatology San Cecilio University HospitalGranada 18014Spain Department of Nursing Faculty of Health SciencesUniversity of GranadaGranada 18004Spain

Recent advancements in the treatment landsca.e of ulcerative colitis(UC)have ushered in a new era of possibilities,particularly with the introduction of Janus kinase(JAK)-signal transducer and activator of transcription *** novel agents offer a paradigm shift in UC management by targeting key signaling pathways involved in inflammatory *** approved JAK inhibitors(JAKis),such as tofacitinib,filgotinib,and upadacitinib,clinicians now have powerful tools to modulate immune responses and gene expression,potentially revolutionizing the treatment algorithm for *** trials have demonstrated the effica.y of JAKis in inducing and maintaining remission,presenting viable options for patients who have failed conventional ***-world data support the use of JAKis not only as first-line treatments but also in subsequent lines of therapy,particularly in patients with aggressive disease phenotypes or refractory to biologic *** rapid onset of action and potency of JAKis have broadened the possibilities in the management strategies of UC,offering timely relief for patients with active disease and facilitating personalized treatment *** safety concerns,including ca.diovascular risks and infections,ongoing research and post-marketing surveillance will continue to refine our understanding of the risk-benefit profile of JAKis in UC management.

关键词： Ulcerative colitis Janus kinase inhibitors Filgotinib Tofacitinib Upadacitinib

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Enhanced memristor performance via coupling effect of oxygen vaca.cy and ferroelectric polarization

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Journal of Materials Science & Technology 2024年第4期171卷 139-146页

作者： Zhi Yun Yue Zhi dong Zhang Zhan Jie Wang Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China School of Materials Science and Engineering Shenyang University of TechnologyShenyang 110870China

As a new type of nonvolatile memory,the resistive memristor has broad applica.ion prospects in in-formation storage and neural computing based on its excellent resistive switching(RS)*** present,it is still a great challenge to improve both ferroelectric polarization and leakage current to achieve a high RS on/offratio of ferroelectric ***,epitaxial Pb(Zr_(0.40)ti_(0.60))O_(3)(PZT)thin films with low content ca.doping were deposited on the Nb:SrtiO_(3)substrate to prepare PCZT/NSTO het-erostructures and their RS behaviors were *** research findings show that compared with pure PZT film,the ferroelectric polarization of 1-mol%-ca.doped PZT film is slightly improved,while the leak-age current is increased by three orders of ***,the RS on/offratio reaches 2.5×10^(5),about three orders of magnitude higher than pure PZT *** theoretica. analysis reveals that the RS behavior of PCZT/NSTO heterostructures is controlled by the PCZT/NSTO interfacial barrier and the space charge-limited current *** results demonstrate that the ferroelectricity and electricity of ferroelectric thin films ca. be improved simultaneously by doping low-content ca.ions to increase the RS performance,which provides a good reference for the development of high-performance ferroelectric memristor devices.

关键词： Ferroelectric memristor ca.doped PZT Ferroelectric polarization Oxygen vaca.cies Resistive switching

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Improved Segmented Belief Propagation List Decoding for Polar Codes with Bit-Flipping

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China Communica.ions 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 significa.tly 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

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Na^(+)/K^(+)-ATPase:ion pump,signal transducer,or cytoprotective protein,and novel biologica. functions

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Neural Regeneration Research 2024年第12期19卷 2684-2697页

作者： Songqiang Huang Wanting dong Xiaoqian Lin Jinsong Bian Department of Pharmacology Joint Laboratory of Guangdong-Hong Kong Universities for Vascular Homeostasis and DiseasesSchool of MedicineSouthern University of Science and TechnologyShenzhenGuangdong ProvinceChina Department of Pharmacology School of Basic MedicineTongji Medical CollegeHuazhong University of Science and TechnologyWuhanHubei ProvinceChina

Na^(+)/K^(+)-ATPase is a transmembrane protein that has important roles in the maintenance of electrochemica. gradients across cell membranes by transporting three Na^(+)out of and two K^(+)into ***,Na^(+)/K^(+)-ATPase participates in ca.(2+)-signaling transduction and neurotransmitter release by coordinating the ion concentration gradient across the cell ***^(+)/K^(+)-ATPase works synergistica.ly with multiple ion channels in the cell membrane to form a dynamic network of ion homeostatic regulation and affects cellular communica.ion by regulating chemica. signals and the ion balance among different types of *** re,it is not surprising that Na^(+)/K^(+)-ATPase dysfunction has emerged as a risk factor for a variety of neurologica. ***,published studies have so far only elucidated the important roles of Na^(+)/K^(+)-ATPase dysfunction in disease development,and we are lacking detailed mechanisms to clarify how Na^(+)/K^(+)-ATPase affects cell *** recent studies revealed that membrane loss of Na^(+)/K^(+)-ATPase is a key mechanism in many neurologica. disorders,particularly stroke and Parkinson's *** of plasma membrane Na^(+)/K^(+)-ATPase with an antibody is a novel strategy to treat these *** this reason,Na^(+)/K^(+)-ATPase acts not only as a simple ion pump but also as a sensor/regulator or cytoprotective protein,participating in signal transduction such as neuronal autophagy and apoptosis,and glial cell ***,the present review attempts to summarize the novel biologica. functions of Na^(+)/K^(+)-ATPase and Na^(+)/K^(+)-ATPase-related *** potential for novel strategies to treat Na^(+)/K^(+)-ATPase-related brain diseases will also be discussed.

关键词： antibody biologica. functions cellular communica.ion electrochemica. gradient ion balance ion channels Na^(+)/K^(+)-ATPase neurologica. diseases neurotransmitter release signal transduction

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YOLOV5s object detection based on Sim SPPF hybrid pooling

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Optoelectronics Letters 2024年第6期20卷 367-371页

作者： dong Xiuhuan LI Shixin ZHANG Jixiang Electronic Engineering Department Tianjin University of Technology and EducationTianjin 300000China

Aiming at the problem of low surface defect detection accuracy of industrial products, an object detection method based on simplified spatial pyramid pooling fast(Sim SPPF) hybrid pooling improved you only look once version 5s(YOLOV5s) model is proposed. The algorithm introduces channel attention(ca. module, simplified SPPF feature vector pyramid and efficient intersection over union(EIOU) loss function. Feature vector pyramids fuse high-dimensional and low-dimensional features, which makes semantic information richer. The ca.mechanism performs maximum pooling and average pooling operations on the feature map. Hybrid pooling comprehensively improves detection computing efficiency and accurate deployment ability. The results show that the improved YOLOV5s model is better than the original YOLOV5s model. The average test accuracy(mAP) ca. reach 91.8%, which ca. be increased by 17.4%, and the detection speed ca. reach 108 FPS, which ca. be increased by 18 FPS. The improved model is practica.le, and the overall performance is better than other conventional models.

关键词： YOLOV5s object detection based on Sim SPPF hybrid pooling

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Modifying effects and mechanisms of superfine stainless wires on microstructures and mechanica. properties of ultra-high performance seawater sea-sand concrete

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Science China Technologica. Sciences 2024年第10期67卷 3205-3220页

作者： YU Feng dong SuFen ASHOUR Ashraf DING SiQi HAN BaoGuo School of Infrastructure Engineering Dalian University of Technology Faculty of Engineering & Informatics University of Bradford Department of Civil and Environmental Engineering The Hong Kong Polytechnic University

Ultra-high-performance seawater sea-sand concrete（UHPSSC） presents a prospective solution to address the natural resource shortage in marine infrastructure construction. To eliminate the corrosion risk of steel fibers and broaden the applica.ility of UHPSSC, this study investigates the mechanica. properties and free chloride ion content as well as microstructures of UHPSSC reinforced with superfine stainless wires（SSWs） under natural curing. The results indica.e that 1.5% SSWs ca. remarkably improve the flexural strength and toughness of UHPSSC by 127% and 1724%, respectively, and mitigate the long-term strength degradation of UHPSSC. The strong interfacial bond between SSW and UHPSSC improves the compactness of UHPSSC, thus reducing the growth space for ca.OH）2crystals and swelling hydration products generated by sulfate and magnesium ions. This ca. be supported by the observed reduction in the ca.Si ratio of C–S–H gels, CH crystal orientation index, and ***, through mechanisms such as pull-out, rupture, overlapping network, and internal anchor interface, SSWs effectively prevent microcrack growth and propagation, transforming single long-connected microcracks into multiple-emission microcracks centered on SSW. Additionally, the free chloride ion content of the composites at 28 and 180 d meets the ACI 318-19 standard requirements for concrete exposed to seawater. This compliance is attributed to the chloride immobilization facilitated by Friedel's salt and C–S–H gels within the interfaces around SSWs and sea-sand. Consequently, SSWs-reinforced UHPSSC exhibits considerable potential for applica.ions in sustainable marine infrastructures, demanding long-term mechanica. properties and high durability.

关键词： ultra-high performance seawater sea-sand concrete superfine stainless wire mechanica. properties chloride ion content microstructure

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Nano-effect enhanced cooperative luminescence of Yb^(3+) clusters in bulk materials

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Journal of Rare Earths 2024年第3期42卷 473-478,I0002页

作者： Daguang Li Jiahao Cui Yanhui dong Hao Cui Dan Zhao Weiping Qin State Key Laboratory on Integrated Optoelectronics College of Electronic Science and EngineeringJilin UniversityChangchun130012China

In order to improve the multi-ion cooperative transition, we proposed and exploited a novel nanosca.e effect, namely the nanoshell effect in bulk materials. Based on the effect, an optimal material structure was designed by coating the surfaces of ca.F_(2):Yb^(3+)micron size particles with ZrO_(2). An about 2 times higher intensity of cooperative luminescence is observed upon laser excitation at 980 nm. Dynamica. analysis exhibits that the novel effect plays a key role in improving the performance of cooperative transitions. Our results also suggest that the nanoshell effect in bulk materials is likely to be significa.t in some special ca.es, which have not been reported yet in the literature.

关键词： Yb^(3+)cluster ZrO_(2) Nanoshell Enhancement Cooperative luminescence Rare earths

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