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Self-separation ionic liquid catalyst for the highly effective conversion of H2S by α,β-unsaturated carboxylate esters under mild conditions

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Green Energy & Environment 2024年第9期9卷 1440-1448页

作者： Wenjie Xiong Xiaomin Zhang Xingbang hu Youting wu Key Laboratory of Mesoscopic Chemistry of MOE School of Chemistry and Chemical Engineering Nanjing University The Institute of Green Chemistry and Engineering School of Chemistry and Chemical Engineering Nanjing University

The deep-processing utility of pure hydrogen sulfide （H2S） is a significant direction in natural gas chemical ***,a brand-new strategy of H2S conversion by a,β-unsaturated carboxylate esters into thiols or thioethers using task-specific carboxylate ionic liquids （ILs） as catalyst has been developed,firstly accomplishing the phase separation of product and catalyst without introducing the third *** can be considered as a cascade reaction in which the product selectivity can be controlled by adjusting the molar ratio of H2S to a,β-unsaturated carboxylate ***,the effects of ILs with different anions and cations,intermittent feeding operations,as well as pressure-time kinetic behaviors on cascade reaction were ***,the proposed interaction mechanism of H2S conversion using butyl acrylate catalyzed by[Emim][Ac]was revealed by DFT-based theoretical *** approach enables the self-phase separation promotion of catalyst and product and achieves 99%quantitative conversion under mild conditions in the absence of solvent,making the entire process ecologically ***-efficiency reaction activity can still be maintained after ten cycles of the ***,the good results,combined with its simplicity of operation and the high recyclability of the catalyst,make this green method environmentally friendly and *** is anticipated that this self-separation method mediated by task-specific ILs will provide a feasible strategy for H2S utilization,which will guide its application on an industrial scale.

关键词： Ionic liquid Cascade reaction Self-separation H 2 S conversion Catalysis

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Capillary Property of Entangled Porous Metallic Wire materials and Its Application in Fluid Buffers:Theoretical Analysis and Experimental Study

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Defence Technology（防务技术） 2024年第1期31卷 400-416页

作者： Yu Tang Yiwan wu hu Cheng Rong Liu Engineering Research Center for Metal Rubber School of Mechanical Engineering and AutomationFuzhou UniversityFuzhou 350156China AECC Guizhou Liyang Aviation Power Co. LTDGuiyang 550014China College of Computer and Information Sciences Fujian Agriculture and Forestry UniversityFuzhou 350156China

Strong impact does serious harm to the military industries so it is necessary to choose reasonable cushioning material and design effective buffers to prevent the impact of *** on the capillary property entangled porous metallic wire materials(EPMWM),this paper designed a composite buffer which uses EPMWM and viscous fluid as cushioning materials under the low-speed impact of the recoil force device of weapon equipment(such as artillery,mortar,etc.).Combined with the capillary model,porosity,hydraulic diameter,maximum pore diameter and pore distribution were used to characterize the pore structure characteristics of *** calculation model of the damping force of the composite buffer was *** low-speed impact test of the composite buffer was *** parameters of the buffer under low-speed impact were identified according to the model,and the nonlinear model of damping force was *** test results show that the composite buffer with EPMWM and viscous fluid can absorb the impact energy from the recoil movement effectively,and provide a new method for the buffer design of weapon equipment(such as artillery,mortar,etc.).

关键词： Entangled porous metallic wire materials Capillary property Viscousfluid Low-speed impact Damping force

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肌少症对股骨颈骨折半髋置换术预后的影响

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中国矫形外科杂志 2024年第18期32卷 1647-1651页

作者：吴明虎陶星光龚东亮张光明王富勇复旦大学附属中山医院青浦分院骨科上海201799

[目的]探讨合并肌少症对股骨颈骨折半髋置换术预后的影响。[方法]回顾性分析2021年1月—2023年12月102例因股骨颈骨折行半髋置换术患者的临床资料。按中华医学会《肌少症共识》,将患者分为肌少组与非肌少组。比较两组围术期、随访和影... 详细信息

[目的]探讨合并肌少症对股骨颈骨折半髋置换术预后的影响。[方法]回顾性分析2021年1月—2023年12月102例因股骨颈骨折行半髋置换术患者的临床资料。按中华医学会《肌少症共识》,将患者分为肌少组与非肌少组。比较两组围术期、随访和影像资料。[结果]本研究纳入的102例患者中,肌少症患者38例,占比37.3%;非肌少症患者64例,占比62.8%。两组患者均顺利手术,均未发生围手术期死亡等严重并发症。两组手术时间、透视次数、出血量差异无统计学意义(P>0.05),但是,肌少组在切口愈合质量[甲/乙,(34/4)vs(64/0),P=0.008]、下地行走时间[(6.7±0.7)d vs(6.0±0.5)d,P0.05)。[结论]股骨颈骨折患者肌少症发生率较高,并且会影响髋关节置换术预后效果。

关键词：肌少症股骨颈骨折半髋置换预后

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Influence of age on seven putative prostate tumor markers： a cohort study in Chinese men

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Asian Journal of Andrology 2017年第4期19卷 463-467页

作者： Wei-Gui Sun Chao-Zhao Liang Qi-Chuan Zheng Xiao-wu hu Zhi-Zhen Li Ping wu Research Institute of Urology Ma'anshan People's Hospital Affiliated to Anhui Medical University Ma'anshan 243000 China Department of Urology The First Affiliated Hospital of Anhui Medical University Hefei 230000 China The Center of Clinical Molecular Biology Laboratory Ma'anshan 243000 China

The accuracy and sensitivity of prostate-specific antigen （PSA） for prostate cancer diagnosis is often poor; however, the reasons for its inaccuracy have rarely been investigated, especially with respect to age. In this study, 476 healthy males, aged 10-89 years, were stratified into eight age groups, and levels of seven markers were determined： total PSA （tPSA）, free PSA （fPSA）, %fPSA, isoform [-2]proPSA （p2PSA）, p2PSA/tPSA, %p2PSA, and the prostate health index （PHI）. Both tPSA and fPSA levels increased with age. The tPSA level was highest （1.39 ng m1-1） at 70-79 years; %fPSA was highest （0.57 ng ml-1） at 10-19 years; and %p2PSA was lowest （18.33 ng ml-1） at 40-49 years. Both p2PSA and p2PSA/tPSA had relatively flat curves and showed no correlation with age （P = 0.222）. PHI was a sensitive age-associated marker （P 〈 0.05）, with two peaks and one trough. The coverage rates and radiance graphs of PHI and %p2PSA were more distinctive than those of tPSA and the other markers. In subjects older than 69 years, PHI and %p2PSA both began to decrease, approximately 10 years earlier than the decrease in tPSA. Our results suggest that the clinical diagnosis of prostate cancer using PSA should be investigated more comprehensively based on patient age. Moreover, %p2PSA and PHI could be considered as earlier markers that may be more suitable than PSA alone.

关键词： age factors diagnosis prostate cancer tumor marker

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Slippery hydrogel with desiccation-tolerant‘skin’for high-precision additive manufacturing

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International Journal of Extreme Manufacturing 2024年第2期6卷 486-500页

作者： Desheng Liu Pan Jiang Yue hu Yaozhong Lu Yixian Wang Jiayu wu Danli hu Tao wu Xiaolong Wang State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000People’s Republic of China CAS Key Laboratory of Chemistry of Northwestern Plant Resources Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000People’s Republic of China Shandong Laboratory of Advanced Materials and Green Manufacturing at Yantai Yantai Zhongke Research Institute of Advanced Materials and Green Chemical EngineeringYantai 264006People’s Republic of China Key Laboratory of Materials-Oriented Chemical Engineering of Xinjiang Uygur Autonomous Region School of Chemistry and Chemical EngineeringShihezi UniversityShihezi 832003People’s Republic of China

Hydrogels inevitably undergo dehydration,structural collapse,and shrinkage deformation due to the uninterrupted evaporation in the atmosphere,thereby losing their flexibility,slipperiness,and manufacturing ***,we propose a novel bioinspired strategy to construct a spontaneously formed‘skin’on the slippery hydrogels by incorporating biological stress metabolites trehalose into the hydrogel network,which can generate robust hydrogen bonding interactions to restrain water *** contents of trehalose in hydrogel matrix can also regulate the desiccation-tolerance,mechanical properties,and lubricating performance of slippery hydrogels in a wide *** vat photopolymerization three-dimensional printing and trehalose-modified slippery hydrogels enables to achieve the structural hydrogels with high resolution,shape fidelity,and sophisticated architectures,instead of structural collapse and shrinkage deformation caused by *** thus,this proposed functional hydrogel adapts to manufacture large-scale hydrogels with sophisticated architectures in a long-term *** a proof-of-concept demonstration,a high-precision and sophisticated slippery hydrogel vascular phantom was easily fabricated to imitate guidewire ***,the proposed protocol is universally applicable to diverse types of hydrogel *** strategy opens up a versatile methodology to fabricate dry-resistant slippery hydrogel for functional structures and devices,expanding their high-precision processing and broad applications in the atmosphere.

关键词： slippery hydrogel trehalose desiccation tolerance vat photopolymerization 3D printing hydrogen bonding

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Improved modified moving average analysis of T-wave alternans using least squares-based curve fitting method

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International Journal of Biomathematics 2014年第4期7卷 173-183页

作者： Xiang-Kui Wan Kang-hui Yan Ang Li Ming-hu wu School of Electrical and Electronic Engineering hubei University of Technology wuhan 430068 P. R. China School of Information Engineering Guangdong University of Technology Guangzhou 510006 P. R. China School of Electrical and Electronic Engineering hubei University of Technology wuhan 430068 P. R. China

T-wave alternans （TWA） in surface electrocardiograph （ECG） signal is considered a marker of abnormal ventricular function which may be associated with ventricular tachy- cardia. Several methods have been developed in recent years to evaluate the important feature. One such method is known as modified moving average （MMA） analysis, which performs well for different levels of TWA, but it is sensitive to the noise in T-waves. In this paper we propose an improved MMA algorithm, which adds a stage of T-wave curve fitting for the MMA method before intermediate averaging. The curve fitting is performed by means of least square method technique. Our assessment study demon- strates the improved performance.

关键词： Electrocardiograph T-wave alternans modified moving average least squaresmethod curve fitting.

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越南AS电站灯泡贯流式水轮发电机通风冷却设计

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水电站机电技术 2024年第5期47卷 22-23,26页

作者：翁焰成吴文虎闫建坡湖南云箭集团有限公司湖南长沙410100

简要介绍越南AS电站灯泡贯流式发电机的通风冷却设计,本机组为大型灯泡贯流式机组,发电机容量大、空间结构紧凑、散热差且环境温度高,通风设计难度大;本文就机组特点、通风冷却设计、温升计算做了简述,总结出该类型机组的设计经验,可供... 详细信息

简要介绍越南AS电站灯泡贯流式发电机的通风冷却设计,本机组为大型灯泡贯流式机组,发电机容量大、空间结构紧凑、散热差且环境温度高,通风设计难度大;本文就机组特点、通风冷却设计、温升计算做了简述,总结出该类型机组的设计经验,可供水电同行参考。

关键词：灯泡贯流式水轮发电机通风冷却温升计算

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Lake microbiome composition determines community adaptability to warming perturbations

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Ecological Processes 2024年第2期13卷 177-191页

作者： Xiaotong wu Qixing Zhou hui Zeng Xiangang hu Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education) Carbon Neutrality Interdisciplinary Science Centre/College of Environmental Science and Engineering Nankai University

Background Microbial communities are crucial for ecosystems. A central goal of microbial ecological research is to simplify the biodiversity in natural environments and quantify the functional roles to explore how the ecosystems respond under different environmental conditions. However, the research on the stability and dynamics of lake microbes in response to repeated warming stress is *** To exclude confounding environmental factors, we conducted a 20-day repeated warming simulation experiment to examine the composition and function dynamics of lake microbial *** Experimental warming significantly altered the community structure of bacteria instead of fungi. Microbial community structure, together with microbial biomass, jointly regulated the function of microbial communities. The plummeting of aerobic denitrifiers Pseudomonadaceae decreased by 99%(P hus determining lake microbial communities' adaptability to heat stress. This study extended our insights on the lake microbial community response and adaptability under warming drivers.

关键词： Temperature Environmental stress Bacteria Fungi Freshwater ecosystem

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Discovery and implications of catenary-bead subaqueous dunes

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Science China Earth Sciences 2016年第3期59卷 495-502页

作者： ZHENG Shu Wei CHENG He Qin wu Shuai hu LIU Gao Wei LU XueJun XU WenXiao State Key Laboratory of Estuarine and Coastal Research East China Normal University

Measurements of topography at the segment of bifurcation between the South Channel and North Channel in the Yangtze Estuary were conducted, and a new type of subaqueous dune was discovered. This structure, newly defined as a catenary-bead dune, consists of a catenary dune and its associated elliptical pit bedform. Based on this finding, the nomenclature of "morphology of dune associated with accompanying bedform" is first proposed. The measured data indicate a mean height and wavelength of 1.29 m and 31.89 m, respectively; wavelength/height ratio(L/H) of 14 to 56; and elliptical pits of mean and maximum depth 0.98 m and 1.98 m, respectively. Flow information was obtained using an Acoustic Doppler Current Profile(ADCP), and the bed material components were gathered with a bottom sampler. The results show mean flood and ebb velocities of 0.27 and 0.78 m s?1, respectively, with shorter duration of flood tide than ebb tide. The silt, very fine sand, and fine sand fractions were within the ranges 21.6–23.4%, 28.2–32.2%, and 39.7–41.6%, respectively, revealing complex bed material composition. Water depth at the study site varies from 13 to 17 m. This finding will enrich the study of dunes and provide important data for geomorphological research. Moreover, the results are significant for engineering applications to estuaries.

关键词： Catenary-bead dune Elliptical pits Morphological nomenclature High resolution Yangtze estuary

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High-order time-reversal symmetry breaking normal state

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Science China(Physics,Mechanics & Astronomy) 2024年第3期67卷 136-148页

作者： Meng Zeng Lun-hui hu Hong-Ye hu Yi-Zhuang You Congjun wu Department of Physics University of CaliforniaSan DiegoCalifornia 92093USA Department of Physics Zhejiang UniversityHangzhou 310058China New Cornerstone Science Laboratory Department of PhysicsSchoolof ScienceWestlake UniversityHangzhou 30024China Institute for Theoretical Sciences Westlake UniversityHangzhou 310024China Key Laboratory for Quantum Materials of Zhejiang Province School of ScienceWestlake UniversityHangzhou 310024China Institute of Natural Sciences Westlake Institute for Advanced StudyHangzhou 310024China

Spontaneous time-reversal symmetry breaking plays an important role in studying strongly correlated unconventional *** two superconducting gap functions with different symmetries compete,the relative phase channel(θ_(-)≡θ_(1)-θ_(2))exhibits an Ising-type Z_(2) symmetry due to the second order Josephson coupling,where θ_(1,2) are the phases of two gap *** contrast,the U(1) symmetry in the channel of θ_(+)≡(θ_(1)+θ_(2))/2 is *** phase locking,i.e.,ordering of θ_(-),can take place in the phase fluctuation regime before the onset of superconductivity,i.e.,when θ_(+) is *** θ_(-) is pinned at ±π/2,then timereversal symmetry is broken in the normal state,otherwise,if θ_(-)=0,or,π,rotational symmetry is broken,leading to a nematic normal *** both cases,the order parameters possess a 4-fermion structure beyond the scope of mean-field theory,which can be viewed as a high order symmetry *** employ an effective two-component XY-model assisted by a renormalization group analysis to address this *** a natural by-product,we also find the other interesting intermediate phase corresponds to ordering of θ_+ but with θ_(-)*** is the quartetting,or,charge-4e,superconductivity,which occurs above the low temperature Z_(2)-breaking charge-2e superconducting *** results provide useful guidance for studying novel symmetry breaking phases in strongly correlated superconductors.

关键词： superconductivity strong correlation time-reversal breaking charge-4e

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