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Synthesis, Structure and Properties of a New Terbium(Ⅲ) Complex Tb2(C15H11O3)6(phen)2

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Chinese Journal of Structural Chemistry 2020年第7期39卷 1087-1092页

作者： yang Ying-Qun LI Wei yang Pin-Fang KUANG yun-fei Key Laboratory of Functional Metal-organic Compounds of Hunan Province&Key Laboratory of Functional Organometallic Materials University of Hunan ProvinceHengyang 421008China Department of Chemistry and Materials Science Hengyang Normal UniversityHengyang 421008China

A new terbium(Ⅲ) complex Tb2(C15H11O3)6(phen)2 has been synthesized with 2-(4-methylbenzoyl)benzoic acid and 1,10-phenanthroline as *** data for the complex are as follows:monoclinic,space group P21/n,a=15.0786(6),b=13.5762(5),c=22.9683(9) A,β=104.130(4)°,V=4559.6(3) A3,Dc=1.540g/cm3,Z=2,μ(MoKα)=1.615 mm-1,F(000)=2136,the final R=0.0528 and wR=*** Tb(Ⅲ) ion is coordinated by eight atoms to give a distorted square antiprism coordination *** complex shows four fluorescence emission bands arising from the transitions of Tb3+5D4→7F6(490 nm),5D4→7F5(546 nm),5D4→7F4(588 nm) and 5D4→7F3(622 nm).The complex is an antiferromagnet in the range of 300~2 *** reported in the paper is the thermal stability property of the title complex.

关键词： terbium(Ⅲ)complex crystal structure fluorescence and magnetic properties

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Achievable rate for three-node discrete memoryless relay channel with generalized feedbacks

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The Journal of China Universities of Posts and Telecommunications 2012年第2期19卷 15-21页

作者： LANG fei WANG Bao-yun College of Telecommunications and Information Engineering Nanjing University of Posts and TelecommtmicationsNanjing 210003China

This paper studies the achievable rate for three-node discrete memoryless relay channel. Specifically in this mode, we explore two generalized feedbacks simultaneously： the source node actively collects feedback signals from the channel; and at the same time, the destination node actively transmits feedback signals to the relay node. These two feedback signals, which are called generalized feedback overheard from the channel that is likely to be noisy, induce that all the three nodes are in full duplex mode. The basic coding strategies of Cover and El Gamal are applied to the relay-source feedback transmission by the source forwarding the compressions of the channel output sequences at the relay node to the destination, and are also applied to the destination-relay feedback transmission to improve the decoding ability at the relay. Based on Cover and El Gamal coding, a new coding scheme adopting rate splitting and four-block Markov superposition encoding is proposed and the corresponding achievable rate is achieved. The proposed scheme is able to exploit two feedbacks simultaneously which can effectively eliminate underlying transmission bottlenecks for the channels. The derived achievable rate result generalizes several previously known results by including them as special cases.

关键词： achievable rate relay feedback Shannon theory

Lithiophilic interface guided transient infiltration of molten lithium for stable 3D composite lithium anodes

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Nano Research 2023年第6期16卷 8297-8303页

作者： Lan-Xing Li yun-Nuo Li fei-fei Cao Huan Ye College of Science Huazhong Agricultural UniversityWuhan 430070China

Fabricating three-dimensional(3D)composite lithium anodes via thermal infusion effectively addresses uncontrollable Li deposition and large volume ***,potential risks due to the long wetting time and high melting point remain a critical yet unconsidered ***,we report a stable 3D composite Li anode by infusing molten Li into a 3D scaffold within 3 s at 220℃.The key-enabling technique is the growth of a lithiophilic Mg-Al double oxide(LDO)nanosheet array layer on the *** in-situ formed lithiophilic alloy,combined with the capillary forces from the nanosheet arrays,enabled the transient infiltration of molten *** addition,the formed high ionic-conductivity Li phase can help construct a robust solid electrolyte interphase(SEI),stabilize the Li anode/electrolyte interface,and guide uniform Li *** 3D composite anode exhibited a long cycling life of 1,000 h under a current density of 1 mA·cm^(−2)and over 1,600 h under a current density of 2 mA·cm^(−2)with a high areal capacity of 4 mAh·cm^(−2)in Li/Li symmetric *** 3D composite anodes paired with high areal capacity LiFePO_(4)(LFP)and S cathodes demonstrate its practical application feasibility.

关键词： lithium metal battery composite Li anode interfacial layer thermal infusion long cycling life

Synthesis,Crystal Structure and Electrochemical Properties of the Complex Cd(α-FRA)_2(Phen)(H_2O)

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Chinese Journal of Structural Chemistry 2006年第11期25卷 1409-1413页

作者： yang Ying-Qun LI Chang-Hong LI Wei GUO Dong-Cai KUANG yun-fei Department of Chemistry and Materials Science Hengyang Normal University Hengyang 421008 China Department of Chemical Engineering Hunan Institute of Technology Hengyang 421008 China College of Chemistry and Chemical Engineering Hunan University Changsha 410082 China

A new cadmium complex Cd（a-FRA）2（Phen）（H20） was synthesized by selfassembly reaction of a-furoic acid, phenanthroline （phen）, and Cd（NO3）2.4H2O. It crystallizes in monoclinic, space group P21/c, with a = 0.6799（2）, b = 1.7780（6）, c = 1.6866（6） nm, β= 94.912（6）°, V= 2.0315（12） nm^3, Dc = 1.742 g/cm^3, Z = 4, M, = 532.77, μ（MoKa） = 1.124 mm^-1, F（000） = 1064, R = 0.0411, wR = 0.0790. The structural analysis shows that the cadmium ion is coordinated with two nitrogen atoms from one phen molecule and four oxygen atoms respectively from two a-furoic acids and one water molecule, giving a distorted octahedral coordination geometry. The cyclic voltametric behavior of the complex was also discussed, which shows that the electrode process is irreversible in the electrode reactor.

关键词： cadmium(Ⅱ) complex crystal structure electrochemical property

Prediction of mechanical properties of cold rolled strip based on improved extreme random tree

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Journal of Iron and Steel Research International 2023年第2期30卷 293-304页

作者： yun-bao Zhao Yong Song fei-fei Li Xian-le Yan Institute of Engineering Technology University of Science and Technology BeijingBeijing100083China

Taking the 2130 cold rolling production line of a steel mill as the research object,feature dimensionality reduction and decoupling processing were realized by fusing random forest and factor analysis,which reduced the generation of weak decision trees while ensured its *** base learner used a weighted voting mechanism to replace the traditional average method,which improved the prediction ***,the analysis method of the correlation between steel grades was proposed to solve the problem of unstable prediction accuracy of multiple steel *** experimental results show that the improved prediction model of mechanical properties has high accuracy:the prediction accuracy of yield strength and tensile strength within the error of±20 MPa reaches 93.20%and 97.62%,respectively,and that of the elongation rate under the error of±5%has reached 96.60%.

关键词： Cold strip rolling Mechanical property prediction Extreme random tree Factor analysis Random forest Correlation analysis Steel grade

Universal paradigm of ternary metacomposites with tunable epsilon-negative and epsilon-near-zero response for perfect electromagnetic shielding

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Rare Metals 2024年第2期43卷 796-809页

作者： yun-Peng Qu yun-Lei Zhou yang Luo Yao Liu Jun-fei Ding Yan-Li Chen Xiu Gong Jing-Liang yang Qiong Peng Xiao-Si Qi College of Physics Guizhou UniversityGuiyang550025China Hangzhou Institute of Technology Xidian UniversityHangzhou311231China Department of Materials ETH Zurich8093ZurichSwitzerland Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials(Ministry of Education) Shandong UniversityJinan250061China

CaCu_(3)Ti_(4)O_(12)(CCTO)ceramic nanocomposites incorporating graphene–carbon black(GRCB)fillers were fabricated by spark plasma sintering *** percolative effects of conductive GRCB fillers on dielectric response of GRCB/CCTO ternary metacomposites were systematically *** weakly real permittivity(ε′)-negative response(ε′~−1×10^(2))was achieved which originated from weakly low-frequency plasmonic state of free carriers within constructed GRCB *** enhancing three-dimensional GRCB network,the plasma frequency of metacomposites increased while the damping factor ***,theε′-negative values of metacomposites were tuned from−10^(2) to−10^(4) orders of magnitude andε′-near-zero(ENZ)frequencies from~142 to~340 MHz which substantially benefited from the moderate carrier concentration of GRCB dual *** Drude model and equivalent circuit models were adopted to demonstrate dielectric and electrical *** obtained metacomposites show strong EM shielding effect along with enhanced plasmonic oscillation and even better achieving perfect EM shielding effect in ENZ *** work achieves the tunableε′-negative andε′-near-zero response and more importantly clarifies its regulation mechanism in ceramic-based ternary metacomposites,which opens up the possibility of designing high-performance EM shielding materials based on metacomposites.

关键词： Metacomposites Ceramic matrix composites Negative permittivity Epsilon-near-zero Electromagnetic shielding

Application of steam injection in iron ore sintering:fuel combustion efficiency and CO emissions

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Journal of Iron and Steel Research International 2023年第1期30卷 31-39页

作者： Yi-fan Wang Tao yang Hao-yu Wang Long Ding yun-fei Luo Hong-ming Long School of Metallurgical Engineering Anhui University of TechnologyMa’anshan 243032AnhuiChina Department of Chemical/Biochemical Engineering Western UniversityLondon N6A 5B9OntarioCanada Key Laboratory of Metallurgical Emission Reduction&Resources Recycling(Anhui University of Technology) Ministry of EducationMa’anshan 243002AnhuiChina

Improving the combustion efficiency of fuels is essential to reducing pollutant emissions in the iron ore sintering *** sintering bed surface steam-injection technology has attracted significant research interest for its potential advantages in low-energy consumption and low *** effect of steam injection on fuel combustion efficiency and CO emission was studied by comparing the thermodynamic response from the sintering process before and after steam *** mechanism of improving combustion efficiency was also *** results indicated that the sintering gas medium of H_(2)O-H_(2)-N_(2)-O_(2) with the blown steam improved the heat transfer conditions of fuel combustion and promoted the water gas *** optimum state of steam injection was achieved at 15 min after ignition with 0.02 m^(3) min^(-1).The CO emission reduction is 10.91% compared with the base *** combustion efficiency was 88.83%,6.15% higher than conventional sintering,and the solid fuel consumption was reduced by 1.15 kg t^(-1).It was indicated that steam injection would improve combustion efficiency and reduce solid fuel ***,the steam injection could improve the combustion kinetic conditions in the zone of unburned fuel and low oxygen partial *** was conducive to the reaction of H_(2)O with C and CO to convert the CO of reducing atmosphere to CO_(2),which in turn realized the complete combustion of fuel and CO and improved the efficiency of fuel combustion.

关键词： Sintering Steam injection Fuel Combustion efficiency CO emission

Volume of Singular Hyperbolic Sets

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Acta Mathematica Sinica,English Series 2021年第10期37卷 1507-1512页

作者： Dao fei ZHANG yun Tao ZANG Mathematics Institute University of WarwickCoventryCV47ALUK School of Mathematical Sciences East China Normal UniversityShanghai 200062P.R.C

Let X be a C^(1+)vector field on a compact Riemannian manifold M with dimension d≥***Λbe a transitive singular hypebolic set with positive *** show thatΛ=M andΛis a uniformly hyperbolic set without singularities.

关键词： Uniformly hyperbolic singular hyperbolic volume

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丙泊酚靶控输注在人工流产手术中的应用

实用疼痛学杂志 2008年第5期4卷 363-365页

作者：李增运张鸿飞杨立显史志远兰州军区总医院安宁分院麻醉科 730070 兰州大学第二临床医学院麻醉科 730030

目的观察人工流产术应用丙泊酚靶控输注(TCI)复合不同药物静脉镇痛的临床效果和安全性。方法选择门诊自愿终止妊娠的女性120例(孕期0.05)。丙泊酚用量P组显著高于其他两组(P<0.01)。结论丙泊酚靶控输注复合氯诺昔康静脉镇痛在人工流产... 详细信息

目的观察人工流产术应用丙泊酚靶控输注(TCI)复合不同药物静脉镇痛的临床效果和安全性。方法选择门诊自愿终止妊娠的女性120例(孕期0.05)。丙泊酚用量P组显著高于其他两组(P<0.01)。结论丙泊酚靶控输注复合氯诺昔康静脉镇痛在人工流产手术中较单一使用丙泊酚,具有丙泊酚用量小,麻醉效果好,呼吸、循环抑制轻之特点。

关键词：丙泊酚氯诺昔康靶控输注全凭静脉麻醉人工流产