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Adsorption of toluene, ethylbenzene and xylene isomers on multi-walled carbon nanotubes oxidized by different concentration of NaOCI

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Frontiers of Environmental Science & Engineering 2012年第3期6卷 320-329页

作者： fei YU jie MA Yanqing WU School of Environmental Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of Pollution Control and Resource Reuse School of Environmental Science and EngineeringTongji UniversityShanghai 200092China

Multi-walled carbon nanotubes （MWCNTs） were fabricated and oxidized by different concentrations of sodium hypochlorite （NaOC1） solutions. The untreated MWCNTs and modified MWCNTs were employed as adsorbents to study their characterizations and adsorption performance of toluene, ethylbenzene and xylene isomers （TEX） in an aqueous solution. The physicochemical properties of MWCNTs were greatly affected after oxidation, which influences TEX adsorption capacity. The 3% NaOCl-oxidized MWCNTs shows the greatest enhancement in TEX adsorption, followed by the 30% NaOCl. More interestingly, the 15% NaOCl-oxidized MWCNTs has lower adsorption capacities than untreated MWCNTs. The adsorption mechanism of TEX on treated MWCNTs is attributed to the combined action of hydrophobic interaction, π-π bonding interaction between the aromatic ring of TEX and the oxygen-containing functional groups of MWCNTs and electrostatic interac- tion. 3% NaOCl solution could not only introduce much oxygen-containing functional groups on MWCNTs, but also lead to less damage for the pore structure. This suggests that the CNTs-3% NaOCl is efficient adsorbent for TEX and that they may possess good potential for TEX removal in wastewater treatment.

关键词： adsorption toluene ethylbenzene and xylene isomers (TEX) multi-walled carbon nanotube surface oxidation

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术前介入栓塞在大中型脑膜瘤手术治疗中应用

创伤与急危重病医学 2020年第3期8卷 137-141页

作者：谢昌纪周志宇韦成聪陈杰飞黄俊萍广西壮族自治区民族医院神经外科广西壮族自治区南宁530001

目的探讨术前介入栓塞在大中型脑膜瘤手术治疗中的应用价值。方法选取自2016年1月至2019年1月广西壮族自治区民族医院收治的46例大中型脑膜瘤手术治疗患者为研究对象。根据栓塞材料的不同将患者分为A组(手术前使用聚乙烯醇颗粒介入栓塞,... 详细信息

目的探讨术前介入栓塞在大中型脑膜瘤手术治疗中的应用价值。方法选取自2016年1月至2019年1月广西壮族自治区民族医院收治的46例大中型脑膜瘤手术治疗患者为研究对象。根据栓塞材料的不同将患者分为A组(手术前使用聚乙烯醇颗粒介入栓塞,n=20)和B组(手术前使用明胶海绵介入栓塞,n=16),未进行介入栓塞而直接实施手术治疗者纳入C组(n=10),比较3组患者的手术效果。结果A组完全栓塞12例(60.0%),B组完全栓塞3例(18.8%),两组间比较,差异有统计学意义(P0.05)。部分栓塞患者Simpson分级Ⅰ级所占比例为66.7%(8/12),明显低于完全栓塞的100.0%(15/15)及大部分栓塞的87.5%(7/8),差异均有统计学意义(P<0.05)。结论大中型脑膜瘤手术治疗前行介入栓塞,可缩短患者的手术时间,减少术中出血量,疗效较佳。

关键词：脑膜瘤介入栓塞手术

Rational design of Sn_(4)P_(3)/Ti_(3)C_(2)Tx composite anode with enhanced performance for potassium-ion battery

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Rare Metals 2022年第7期41卷 2259-2267页

作者： jie Zhao Chao-Lin Li Gang chen fei Ji Yi-Yong Shen Juan Peng Wen-Hui Wang School of Civil and Environmental Engineering Harbin Institute of TechnologyShenzhen 518055China Shenzhen Environmental Technology Group Co.Ltd. Shenzhen 518049China State Key Laboratory of Urban Water Resource and Environment School of EnvironmentHarbin Institute of TechnologyHarbin 150090China

The potential application of high-capacity Sn_(4)P_(3)anode for potassium-ion batteries(PIBs)is hindered by the poor cycle stability mainly rooted from the huge volume changes upon cycling and low electronic *** address the above issues,sandwich-like struc-tured Sn_(4)P_(3)/Ti_(3)C_(2)T_(x)was designed and synthesized as anode material for *** a result,Sn_(4)P_(3)/Ti_(3)C_(2)T_(x)pre-sents superior cycle stability(retains a capacity of 103.2 mAh·g^(-1)even after 300 cycles at 1000 mA·g^(-1))and rate capability(delivers 60.7 mAh·g^(-1)at high current density of 2000 mA·g^(-1)).The excellent electrochemical perfor-mance of sandwich-like structured Sn_(4)P_(3)/Ti_(3)C_(2)Tx is orig-inated from the synergistic effect between Sn_(4)P_(3)and Ti_(3)C_(2)T_(x),where Ti_(3)C_(2)T_(x)acts as a conductive matrix to facilitate electron transfer and buffer the volume change of Sn_(4)P_(3)particles upon cycling,while Sn_(4)P_(3)serves as pillars to prevent the collapse and stacking of Ti_(3)C_(2)T_(x)***,significant capacitive contribution is demonstrated as a major contributor to the excellent rate capability.

关键词： Sn_(4)P_(3) Ti_(3)C_(2) TxAnode material Potassium-ion battery

Atomistic study on the microscopic mechanism of grain boundary embrittlement induced by small dense helium bubbles in iron

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Nuclear Science and Techniques 2024年第3期35卷 84-95页

作者： Lei Peng Yong-jie Sun Jing-Yi Shi Yi-fei Liu Shang-Ming chen Liu-Liu Li State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China School of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230027China Science and Technology on Reactor System Design Technology Laboratory Nuclear Power Institute of ChinaChengdu 610213China

The helium bubbles induced by 14 MeV neutron irradiation can cause intergranular fractures in reduced activation ferritic martensitic steel,which is a candidate structural material for fusion *** order to elucidate the susceptibility of different grain boundaries(GBs)to helium-induced embrittlement,the tensile fracture processes of 10 types of GBs with and without helium bubbles in body-centered cubic(bcc)iron at the relevant service temperature of 600 K were investigated via molecular dynamics *** results indicate that in the absence of helium bubbles,the GBs studied here can be classified into two distinct categories:brittle GBs and ductile *** atomic scale analysis shows that the plastic deformation of ductile GB at high temperatures originates from complex plastic deformation mechanisms,including the Bain/Burgers path phase transition and deformation twinning,in which the Bain path phase transition is the most dominant plastic deformation ***,the presence of helium bubbles severely inhibits the plastic deformation channels of the GBs,resulting in a significant decrease in elongation at *** bubble-decorated GBs,the ultimate tensile strength increases with the increase in the misorientation ***,the coherent twin boundary∑3{112}was found to maintain relatively high fracture strength and maximum failure strain under the influence of helium bubbles.

关键词： Helium bubble Grain boundary Embrittlement Reduced activation ferritic martensitic steel Molecular dynamics Bain path

Agent's Optimal Compensation Under Inflation Risk by Using Dynamic Contract Model

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Journal of Systems Science & Complexity 2021年第6期34卷 2291-2309页

作者： fei chen fei Weiyin ZHANG Fanhong YANG Xiaoguang School of Business University of Shanghai for Science and TechnologyShanghai 200093China School of Mathematics-Physics and Finance Anhui Polytechnic UniversityWuhu 241000China School of Mathematics Shanghai University of Finance and EconomicsShanghai 200433China Academy of Mathematics and Systems Science Chinese Academy of SciencesBeijing 100190China

This paper studies the problem of principal-agent with moral hazard in continuous *** firm’s cash flow is described by geometric Brownian motion(hereafter GBM).The agent affects the drift of the firm’s cash flow by her hidden ***,the firm rewards the agent with corresponding compensation and equity which depend on the *** model extends dynamic optimal contract theory to an inflation ***,the authors obtain the dynamic equation of the firm’s real cash flow under inflation by using the It?***,the authors use the martingale representation theorem to obtain agent’s continuation value ***,the authors derive the Hamilton-Jacobi-Bellman(HJB)equation of investor’s value process,from which the authors derive the investors’scaled value function by solving the second-order ordinary differential *** with He;,the authors find that inflation risk affects the agent’s optimal compensation depending on the firm’s position in the market.

关键词： Equity incentive inflation risk It?formula principal-agent problem the martingale representation theorem

Identification and distribution of a single nucleotide polymorphism responsible for the catechin content in tea plants

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Horticulture Research 2020年第1期7卷 2395-2403页

作者： chen-Kai Jiang Jian-Qiang Ma Yu-fei Liu jie-Dan chen De-Jiang Ni Liang chen Key Laboratory of Tea Biology and Resources Utilization Ministry of Agriculture and Rural AffairsTea Research Institute of the Chinese Academy of Agricultural Sciences9 South Meiling RoadHangzhouZhejiang 310008China College of Horticulture and Forestry Science Huazhong Agricultural University1 Shizishan StreetHongshan DistrictWuhanHubei 430070China Tea Research Institute Yunnan Academy of Agricultural SciencesMenghaiYunnan 666201China

Catechins are the predominant products in tea plants and have essential functions for both plants and *** genes encoding the enzymes regulating catechin biosynthesis have been identified,and the identification of single nucleotide polymorphisms(SNPs)resulting in nonsynonymous mutations within these genes can be used to establish a functional link to catechin ***,the transcriptomes of two parents and four filial offspring were sequenced using next-generation sequencing technology and aligned to the reference genome to enable SNP ***,176 tea plant accessions were genotyped based on candidate SNPs using kompetitive allelespecific polymerase chain reaction(KASP).The catechin contents of these samples were characterized by highperformance liquid chromatography(HPLC),and analysis of variance(ANOVA)was subsequently performed to determine the relationship between genotypes and catechin *** a result of these efforts,a SNP within the chalcone synthase(CHS)gene was shown to be functionally associated with catechin ***,the geographical and interspecific distribution of this SNP was ***,these results will contribute to the early evaluation of tea plants and serve as a rapid tool for accelerating targeted efforts in tea breeding.

关键词： distribution content mining

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颞下入路显微手术治疗哑铃型三叉神经鞘瘤

中国临床神经外科杂志 2014年第8期19卷 464-466页

作者：陈杰飞黄玮秦坤明冯大勤廖声潮杨雷霆广西民族医院神经外科南宁530001 广西医科大学第一附属医院神经外科南宁530021

目的探讨颅底颞下-天幕入路显微手术治疗哑铃型三叉神经鞘瘤的效果。方法回顾性分析2003年1月至2012年12月采用颅底颞下-天幕入路显微手术治疗的28例哑铃型三叉神经鞘瘤的临床资料。结果肿瘤全切除23例（82.1%）,次全切除4例,大部分切除... 详细信息

目的探讨颅底颞下-天幕入路显微手术治疗哑铃型三叉神经鞘瘤的效果。方法回顾性分析2003年1月至2012年12月采用颅底颞下-天幕入路显微手术治疗的28例哑铃型三叉神经鞘瘤的临床资料。结果肿瘤全切除23例（82.1%）,次全切除4例,大部分切除1例。术前22例面部麻木、感觉减退患者中,术后16例（72.7%）获得不同程度缓解。术前20例颅神经麻痹者中,术后16例（80%）获得不同程度好转。术前伴有颅内压增高症状、锥体束征、小脑征及面部疼痛者术后均获得缓解。12例患者获得5个月∽7年的随访,5例未全切除患者中复发2例。结论颅底颞下-天幕入路具有路径短,暴露充分,创伤小,易于达到一期全切等优点,适合于绝大多数哑铃型三叉神经鞘瘤的手术治疗。

关键词：三叉神经鞘瘤颅底颞下-天幕入路显微手术

Tunable synchrotron-like radiation from centimeter scale plasma channels

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Light(Science & Applications) 2016年第1期5卷 819-825页

作者： Min chen Ji Luo fei-Yu Li Feng Liu Zheng-Ming Sheng jie Zhang Key Laboratory for Laser Plasmas(MOE) Department of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China Collaborative Innovation Center of IFSA(CICIFSA) Shanghai Jiao Tong UniversityShanghai 200240China SUPA Department of PhysicsUniversity of StrathclydeGlasgow G40NGUK

Synchrotron radiation(SR)sources are immensely useful tools for scientific researches and many practical ***,the state-of-the-art synchrotrons rely on conventional accelerators,where electrons are accelerated in a straight line and radiate in bending magnets or other insertion ***,these facilities are usually large and ***,we study a compact all optical synchrotron-like radiation source based on laser-plasma acceleration either in a straight or a curved plasma *** the laser pulse off-axially injected,its centroid oscillates transversely in the plasma *** results in a wiggler motion of the whole accelerating structure and the self-trapped electrons behind the laser pulse,leading to strong synchrotron-like radiations with tunable *** is further shown that a palmtop ring-shaped synchrotron is possible with current high power laser *** its potential of high flexibility and tunability,such light sources once realized would find applications in wide areas and make up the shortage of large SR facilities.

关键词： laser guiding laser wakefield acceleration synchrotron radiation

Stabilization of Continuous-Time Systems Against Stochastic Network Uncertainties:Fundamental Variance Bounds

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Journal of Systems Science & Complexity 2021年第5期34卷 1858-1878页

作者： QI Tian chen jie School of Automation Science and Engineering Key Laboratory of Autonomous Systems and Networked ControlSouth China University of TechnologyGuangzhou 510640China Department of Electrical Engineering City University of Hong KongHong KongChina

This paper studies the stabilizability and stabilization of continuous-time systems in the presence of stochastic multiplicative *** authors consider multi-input,multi-output(MIMO)linear time-invariant systems subject to multiple static,structured stochastic uncertainties,and seek to derive fundamental conditions to ensure that a system can be stabilized under a mean-square *** the stochastic control framework,this problem can be considered as one of optimal control under state-or input-dependent random noises,while in the networked control setting,a problem of networked feedback stabilization over lossy communication *** authors adopt a mean-square small gain analysis approach,and obtain necessary and sufficient conditions for a system to be meansquare stabilizable via output *** single-input,single-output(SISO)systems,the condition provides an analytical bound,demonstrating explicitly how plant unstable poles,nonminimum phase zeros,and time delay may impose a limit on the uncertainty variance required for mean-square *** MIMO minimum phase systems with possible delays,the condition amounts to solving a generalized eigenvalue problem,readily solvable using linear matrix inequality optimization techniques.

关键词： Mean-square small gain theorem multiplicative stochastic uncertainty networked control