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| 1 | Experimental investigation into stress-relief characteristics with upward large height and upward mining under hard thick roof显示文摘 | Ke Yang Xiang He Litong Dou Wenjun Liu Li Sun Haisong Ye | 2015 | International Journal of Coal Science & Technology2015，2，1： | 20 |
| 2 | Effect of temperature and oxygen on the formation of chlorobenzene as the indicator of PCDD/Fs显示文摘Sampling and analysis of polychlorinated dibenzo-p-dioxins and dibenzofurans(PCDD/Fs) are both time-consuming and expensive. In principle,real-time monitoring of chlorobenzene(CBz) as an indicator for PCDD/Fs could be useful to control and optimize incinerator operating conditions.To test this strategy,CBz was analyzed together with PCDD/Fs in flue gas samples collected from a hospital waste incinerator.Moreover,lab experiments were conducted to investigate the eect of temperature and oxygen on CBz formation from fly ash from the same incinerator.The experimental results demonstrate that chlorobenzene(in particular PeCBz) correlate well with PCDD/Fs,in line with previous research.The optimum temperature of CBz formation is in a range of 350 to 400°C and CBz yield increases significantly with oxygen,in line with PCDD/Fs formation.This study is useful for confirming the de novo mechanism and defining correlations between CBz and PCDD/Fs. | Mi Yan,Xiaodong LiTong Chen,Shengyong Lu,Jianhua Yan,Kefa Cen State Key Laboratory of Clean Energy Utilization,Zhejiang University,Hangzhou 310027,China | 2010 | Journal of Environmental Sciences2010，22，10： | 16 |
| 3 | Mechanical and dielectric properties of porous and wave-transparent Si3N4–Si3N4 composite ceramics fabricated by 3D printing combined with chemical vapor infiltration显示文摘Porous Si3N4–Si3N4 composite ceramics were fabricated by 3D printing combined with low-pressure chemical vapor infiltration(CVI).This technique could effectively improve the designability of porous Si3N4 ceramics and optimize the mechanical and dielectric properties.The effects of process parameters including the deposition time and heat treatment on the microstructure and properties of porous Si3N4–Si3N4 composite ceramics were studied.The study highlights following:When CVI processing time was increased from 0 to 12 h,the porosity decreased from68.65%to 26.07%and the density increased from 0.99 to 2.02 g/cm3.At the same time,the dielectric constant gradually increased from 1.72 to 3.60;however,the dielectric loss always remained less than0.01,indicating the excellent electromagnetic(EM)wave-transparent performance of porous Si3N4–Si3N4 composite ceramics.The maximum flexural strength of 47±2 MPa was achieved when the deposition time attained 6 h.After heat treatment,the porosity increased from 26.07%to 36.02%and the dielectric constant got a slight increase from 3.60 to 3.70 with the dielectric loss still maintaining lower than 0.01.It has been demonstrated that the porous Si3N4–Si3N4 composite ceramics are a promising structural and EM wave-transparent material suitable for high temperature service. | Zanlin CHENG Fang YE Yongsheng LIU Tianlu QIAO Jianping LI Hailong QIN Laifei CHENG Litong ZHANG | 2019 | Journal of Advanced Ceramics2019，8，3： | 10 |
| 4 | Electrochemical synthesis of silver nanoparticles-coated gold nanoporous film electrode and its application to amperometric detection for trace Cr(VI)显示文摘A simple and rapid approach for the electrochemical synthesis of Ag nanoparticles-coated gold nanoporous film (AgGNF) on a gold substrate was reported. The solid gold electrode (SGE) was directly anodized under a high potential of 5 V, and then reduced to obtain gold nanoporous film (AuNF) by freshly prepared ascorbic acid. The Ag nanoparticles (AgNPs) were grown on the AuNF electrode by potential-step electrodeposition. The resulting AgGNF composites electrodes were characterized by scanning electron microscopy (SEM), energy dispersive X-ray (EDX) spectroscopy and cyclic voltammetry (CV). As-prepared AgGNF electrode was used as a kind of superior sensor for Cr(VI) detection, which exhibited better electrocatalytic behavior than those of AuNF and SGE under identical conditions. Such a designed AgGNF nanocomposites electrode showed outstanding sensitivity (about 0.15 nA/ppb) and favorable reproducibility for Cr(VI) detection. The dependence of reduction current on Cr(VI) concentration is linear from 2 to 370 ppb with a low detection limit of 0.65 ppb. Interferences from other heavy metals ions (Cr3+, Cu2+, Pb2+, As3+ and Hg2+) associated with Cr(VI) analysis could be effectively diminished. The present method proves to be rapid, reliable, sensitive and low-cost. | XU He ZHENG QiaoLi YANG Ping LIU JianShe XING SuJie JIN LiTong | 2011 | Science China Chemistry2011，54，6： | 9 |
| 5 | Dielectric and Electromagnetic Wave Absorbing Properties of Two Types of SiC Fibres with Different Compositions显示文摘The dielectric and electromagnetic properties of two types of SiC fibres with different compositions were investigated. The permittivity and electromagnetic shielding effectiveness (SE) of SiC fibre bundles were measured in 8.2-12.4 GHz by waveguide method. The reflection coefficient (RC) of unidirectional SiC fibre laminates was determined in 8-18 GHz using naval research laboratory (NRL)-arc method. Results showed that the electromagnetic wave (EMW) absorbing properties of SiC fibres were correlated with their composition, microstructure and instinct performance of electrical resistance. SiC fibres with higher content and greater size of nano-scale β-SiC showed higher permittivity, conductivity, SE and lower RC, which resulted in their better EMW absorbing ability, i.e. the lower reflection to EMW. | Fang Ye Litong Zhang Xiaowei Yin Yongsheng Liu Laifei Cheng | 2013 | Journal of Materials Science & Technology2013，29，1： | 7 |
| 6 | Chattering analysis for discrete sliding mode control ofdistributed control systems显示文摘The chattering characteristic of sliding mode control is analyzed when it is applied in distributed control systems(DCSs).For a DCS with random time delay and packet dropout, a discrete switching system model with time varying sampling period is constructed based on the time delay system method. The reaching law based sliding mode controller is applied in the proposed system. The exponential stability condition in the form of linear matrix inequality is figured out based on the multi-Lyaponov function method. Then, the chattering characteristic is analyzed for the switching system, and a chattering region related with time varying sampling period and external disturbance is proposed. Finally, numerical examples are given to illustrate the validity of the analysis result. | litong ren shousheng xie yu zhang jingbo peng ledi zhang | 2016 | Journal of Systems Engineering and Electronics2016，27，5： | 4 |
| 7 | Divergent patterns of foliar δ^(13)C and δ^(15)N in Quercus aquifolioides with an altitudinal transect on the Tibetan Plateau: an integrated study based on multiple key leaf functional traits显示文摘Aims With a close association with plant water availability,foliar δ^(13)C had been investigated extensively in alpine regions;however,foliar δ^(15)N has rarely been concurrently used as an indicator of plant nitrogen availability.Due to the positive correlations between leaf nitrogen con-tent and foliar δ^(13)C andδ15N found in previous studies,we expected that they should show consistent patterns along an altitudinal gradient.Methods To test our hypothesis,we measured foliar δ^(13)C andδ15N in conjunc-tion with multiple key leaf functional traits of Quercus aquifolioides,a dominant species of alpine forest on the eastern slopes of the sygera mountains,southeastern Tibetan Plateau from 2500 to 3800 m.Important findings(i)Contrary to our hypothesis,foliar δ^(13)C exhibited a significant pos-itive linear relationship with altitude;in contrast,foliarδ15N initially increased and subsequently decreased with altitude,the change in trend occurring around 3300 m.(ii)our analyses indicated that leaf internal resistance and stomatal conductance,rather than photosynthetic capacity indicated by leaf N concentration,appar-ently explained the altitudinal variation in foliar δ^(13)C,while differ-ences in foliar δ^(15)N were likely the result of soil N availability.(iii)Principal component analysis revealed a clear association between δ^(13)C and a tradeoff between water loss and carbon gain,indicated by traits related to gas exchange such as leaf thickness,density,sto-matal properties.In contrast,the second axis was associated withδ15N and nitrogen acquisition strategy in Q.aquifolioides across its altitudinal distribution,represented by traits related to nitrogen concentration and stomata per gram of leaf nitrogen. | Litong Chen Dan F.B.Flynn Xiaowei Zhang Xianliang Gao Ling Lin Jian Luo Changming Zhao | 2015 | Journal of Plant Ecology2015，8，3： | 4 |
| 8 | Design of an Enhanced Sensitivity FBG Strain Sensor and Application in Highway Bridge Engineering显示文摘紧张传感器被给,并且而且高取得资格,拉紧传感器的提高的敏感纤维栅栏(FBG ) 的理论设计方法被开发并且制作,谁的察觉到性质对实际应用程序好。有圆柱的壳封装的紧张传感器包含了三管状的结构,由于不平的表面结构,在紧张集中的区域,改进敏感。它能完成埋入紧张测量和表面测量并且有容易的安装的优点。好协议在大小和理论模拟结果之间被获得。在每刻度测试以后, 24 个 FBG 紧张传感器和六个 FBG 温度赔偿传感器在 Yongtaiwen 高速公路在 Diaoshuiyan 桥牌的盒子 girder 的下面上被安装了。最后,我们为高速公路桥建立了一个长期的结构健康系统。 | Litong LI Dongsheng ZHANG Hui LIU Yongxing GUO Fangdong ZHU | 2014 | Photonic Sensors2014，4，2： | 4 |
| 9 | Photosynthetic acclimation to long-term high temperature and soil drought stress in two spruce species (Picea crassifolia and P. wilsonii) used for afforestation显示文摘Picea crassifolia and P.wilsonii,commonly used for afforestation in northern China,are increasingly likely to be subjected to high temperatures and soil drought stress as a result of global warming.However,little is known about the effects of these stresses on foliar photosynthesis in the two species.To investigate how photosynthetic characteristics and sensitivity respond to prolonged high temperatures and soil drought,foliar gas exchange and other closely related parameters were recorded from four-year-old seedlings of both species.Seedlings were grown under two temperature treatments(25/15 and 35/25 °C) and four soil water regimes [80,60,40 and 20% of maximum field capacity(FC)] for 4 months.Although all treatments significantly reduced photosynthetic rates(P_n) of both species,P.crassifolia exhibited greater photosynthetic acclimation than P.wilsonii.Differences in photosynthetic acclimation were mainly related to variations in stomatal conductance(Cond) and the maximum quantum yield of PSII(F_v/F_m) between treatments.Indeed,higher Cond and F_v/F_m in all treatments were shown for P.crassifolia than for P.wilsonii.Moreover,photosynthesis in P.crassifolia exhibited inherently lower temperature sensitivities(broader span for the temperature response curves; lower b) and higher thermostability(invariable b between treatments).Further,severe drought stress(20% FC) limited the survival of P.wilsonii.Our results indicate that P.wilsonii is more susceptible to high temperatures and soil drought stress.Planting P.crassifolia would be more expected to survive these conditions and hence be of greater benefit to forest stability if predicted increases in drought and temperature in northern China occur. | Xiaowei Zhang Litong Chen Jingru Wang Minghao Wang Shuli Yang Changming Zhao | 2018 | Journal of Forestry Research2018，29，2： | 4 |
| 10 | Proportional Limit Stress and Residual Thermal Stress of 3D SiC/SiC Composite显示文摘Proportional limit stress(PLS) and residual thermal stresses(RTS) of 3D SiC/SiC composite were investigated.PLS was obtained by four different methods from the monotonic stress—strain response curve to get a convincing value.RTS in the SiC matrix was quantified by solving the geometric intersection point of the regression lines of hysteresis loops from the periodical loading—unloading—reloading cycle test curve.Classical ACK model and analytical formulas were used to analytically calculate the PLS and RTS of 3D SiC/SiC composite.Good agreement between the experimental results and the analytical calculation was observed.And relationship between the PLS and the RTS of 3D SiC/SiC was discussed. | Shanhua Liu Litong Zhang Xiaowei Yin Yongsheng Liu Laifei Cheng | 2014 | Journal of Materials Science & Technology2014，30，10： | 3 |
| 11 | Microstructure and mechanical properties of three-dimensional carbon/silicon carbide composites fabricated by chemical vapor infiltration显示文摘 | Yongdong Xu Litong Zhang Laifei Cheng Dantao Yan | 1998 | Carbon1998，，7： | 3 |
| 12 | Phosphorus does not alleviate the negative effect of nitrogen enrichment on legume performance in an alpine grassland显示文摘Aims Nitrogen(N)-fixing legumes,despite being highly phosphorus(P)-demanding,constitute an important plant functional group and play key roles in N-poor ecosystems such as alpine grasslands.However,legume performance,including biomass,abundance and species richness,is expected to change,because anthropogenic activities have drastically increased soil N and P availability world-wide.We conducted a field experiment to assess the effects of N and P addition,alone and in combination,on legume performance in an alpine grassland,and identified and clarified the mechanisms underlying these changes.Methods A three year field experiment of N addition(10 g N m−2 year−1),P addition(5 g P m−2 year−1),and N+P combined addition(both N and P,same amounts as solo treatments)was conducted in an alpine grassland on the tibetan Plateau in china from 2011 to 2013.Effects of nutrient addition were assessed at the community level(above-ground net primary production(ANPP),height and light intensity),functional group level(biomass,species richness,relative height,relative coverage and relative density of legumes)and species level(foliar N,P concentration of two legumes).Important findings Overall,adding N alone significantly increased ANPP by 20.82%,but adding P alone did not;whereas,addition of N and P together resulted in a large increase in ANPP(+37.03%)than addition of either alone,indicating potential co-limitation of alpine grasslands.In contrast,adding P alone significantly promoted legume perfor-mance as measured by 65.22%increase in biomass and 58.45%increase in relative abundance,while adding N alone reduced leg-ume performance as measured by 39.54%decrease in biomass and 50.36%in relative abundance.combining P and N addition did not mitigate the negative effect of N addition on legume performance and,surprisingly,suppressed legume biomass by 53.14%and relative abundance by 63.51%.N and P addition altered the balance of light competition between grasses and legumes as indicated by the changes in light levels,plant heights and litter accumulation.However,there were no obvious changes in legume species richness in response to N and P within our experimental timeframe.this study provides further evidence of the importance of P as a co-limiting nutrient in alpine grasslands,contrary to the traditional view that N limitation predominates in such regions.the contrasting effects of N and P addition on legume performance provide important insights into potential changes in legume performance in nutrient-limited grasslands following N and P enrichment under climate change,with implications for nutrient management in alpine grasslands. | Fei Ren Weimin Song Litong Chen Zhaorong Mi Zhenhua Zhang Wenyan Zhu Huakun Zhou Guangmin Cao Jin-Sheng He | 2017 | Journal of Plant Ecology2017，10，5： | 3 |
| 13 | Fabrication and Properties of Porous Si_3N_4 Ceramic with High Porosity显示文摘A novel process combining oxidation-bonding and sintering was developed to fabricate porous Si3N4 ceramic with high porosity. After sintering at 1800℃, the SiO2 in porous Si3N4 ceramic transforms into Si2N2O because of the reaction of SiO2 and Si3N4 . Due to the reaction of SiO2 and carbon, the porosity of porous Si3N4 ceramic increases obviously from 40.2% to 76.8% with the weight decreasing by 35.6%. As the porosity increases, the dielectric constant and loss of the porous Si3N4 ceramic decrease obviously from 3.08 to 1.61 and from 3.70×10(-3) to 0.74×10(-3) , but due to the production of Si2N2O whose mechanical properties are much higher than SiO2 and the increase of the bonding strength among Si3N4 particles, the flexural strength and the fracture toughness of the porous Si3N4 ceramic decrease from 55 to 39 MPa and from 0.7 to 0.5 MPa·m(1/2) , respectively, but its Vickers hardness increases from 1.2 to 1.3 GPa. | Xiangming Li Litong Zhang Xiaowei Yin | 2012 | Journal of Materials Science & Technology2012，28，12： | 3 |
| 14 | An investigation on a novel PDLC film's fabrication and its electro-optical properties显示文摘A polymer dispersed liquid crystal (PDLC) film that has good electro-optical properties is produced by the method of polymerized-induced phase separation. Based on the application foreground, its capability parameters, such as contrast ratio, work voltage, and visual angle, are characterized for the first time by a white light but not a fixed wavelength light. The results show the PDLC film has a low work-voltage of 20 V, more than 150° visual angle, high stability, and long lifetime. The differences between plastic and glass ITO-coated substrates of PDLC films are also studied in this paper. The plastic substrate has better property and will have a wider perspective especially in the portable, tender and folded display devices. Due to adjustable properties of film by electric field, PDLC has the potential application for display device, sensor, switch, grating, and new generation analytical apparatus. | DING HongLiu, ZHAO Ting, CHENG YuXiao, PANG YueHong, XU He, SHI GuoYue & JIN LiTong Chemistry Department of East China Normal University, Shanghai 200062, China | 2007 | Science China Chemistry2007，50，3： | 2 |
| 15 | Electrochemical Determination of Phenylethanolamine A Based on Nafion/MWCNTs/AuNPs Modified Carbon Electrode显示文摘Phenylethanolamine A (豌豆) , -agonist, 被发现去年非法在猪被用作一个生长倡导者,引起中国管理的大注意。这里,一个敏感电气化学的方法为由黄金的固定检测豌豆被开发 nanoparticles (AuNPs ) , multiwalled 碳 nanotubes (MWCNT ) 和一个玻璃质的碳电极(GCE ) 的表面上的 Nafion。Nafion/MWCNTs/AuNPs 电影被扫描电子显微图(SEM ) 和电气化学的阻抗光谱学(EIS ) 描绘。在修改 GCE 的豌豆的电气化学的行为详细被调查。AuNPs, MWCNT 和 Nafion 的合作效果放大豌豆的电气化学的减小信号,并且为豌豆决心导致高敏感。在最佳的条件下面,电气化学的传感器显示出 0.01 ~ 10 的一个宽线性范围(有 0.005 的察觉限制的 mol/L ???????? ? 吗?? | Yanjun Lai Jing Bai Wei Zhu Yuezhong Xian Litong Jin | 2013 | Chinese Journal of Chemistry2013，31，2： | 2 |
| 16 | 3D printing“wire-on-sphere”hierarchical SiC nanowires/SiC whiskers foam for efficient high-temperature electromagnetic wave absorption显示文摘Electromagnetic wave absorption(EWA)materials for use in extreme environments are of great interest.Herein,SiC nanowires/SiC whiskers(SiC_(nw)/SiC_(w))foam with unique“wire-on-sphere”hierarchical structure was developed for efficient high-temperature EWA.SiC_(w)were assembled to porous SiC_(w)spheres via spray drying and then SiC_(w)spheres were 3D printed to SiC_(w)foam.The catalyst-free precursor infiltration pyrolysis process was first developed to ensure that SiCnwcan intentionally grow in situ on the surface of SiC_(w)spheres,thereby achieving“wire-on-sphere”hierarchical structure foam.At room-temperature,the maximum electromagnetic wave effective absorption bandwidth(EAB_(max))and minimum electromagnetic wave reflection coefficient(RC_(min))of SiC_(nw)/SiC_(w)foam can reach 4 GHz and-57 dB,respectively.At600℃,the EAB_(max)and RC_(min) were 3 GHz and-15 dB,respectively.Furthermore,even oxidized at 1000-1500℃,SiC_(nw)/SiC_(w)foam can still retain EAB_(max)ranging from 2.7 to 3.9 GHz and RC_(min)ranging from-16 dB to-64 dB,because the formation of SiO_(2)layer with appropriate thickness can boost interfacial polarization and regulate impedance matching.The SiC_(nw)/SiC_(w)foam also shows the flexural strength as high as 17.05 MPa.All results demonstrate that the SiC nw/SiC_(w)foam is a promising EWA material for applications of harsh environments.And the material-independent“wire-on-sphere”hierarchical structure and its novel preparation process should find the widespread use in the design and fabrication of high-efficiency EWA micro-nano materials. | Xinyuan Lv Fang Ye Laifei Cheng Litong Zhang | 2022 | Journal of Materials Science & Technology2022，，14： | 2 |
| 17 | Reaction kinetics and ablation properties of C/C–ZrC composites fabricated by reactive melt infiltration显示文摘 | Yiguang Wang Xiaojuan Zhu Litong Zhang Laifei Cheng | 2011 | Ceramics International2011，，4： | 2 |
| 18 | A simple and sensitive method for the determination of 4-n-octylphenol based on multi-walled carbon nanotubes modified glassy carbon electrode显示文摘A simple and sensitive electroanalytical method was presented for the determination of 4-n-octylphenol(OP) based on multi-walled carbon nanotubes(MWCNTs) modified glassy carbon electrode(GCE).OP was directly oxidized on the MWCNTs/GCE,and the electrochemical oxidation mechanism was demonstrated by a one-electron and one-proton process in the reaction.The oxidation peak current of OP was significantly enhanced by the use of MWCNTs/GCE compared with those of bare glassy carbon electrode,suggesting that the modified electrode can remarkably improve the performance for OP determination.Factors influencing the detection processes were optimized.Under these optimal conditions,a linear relationship between concentration of OP and current response was obtained in the range of 5 × 10-8 to 1 × 10-5 mol/L with a detection limit of 1.5 × 10-8 mol/L and correlation coefficient 0.9986.The modified electrode showed good selectivity,sensitivity,reproducibility and high stability. | Qiaoli Zheng Ping Yang He Xu Jianshe Liu Litong Jin | 2012 | Journal of Environmental Sciences2012，24，9： | 2 |
| 19 | Dielectric,Electromagnetic Interference Shielding and Absorption Properties of Si_3N_4-PyC Composite Ceramics显示文摘Pyrolytic carbon(PyC) was infiltrated into silicon nitride(Si3N4) ceramics by precursor infiltration and pyrolysis (PIP) of phenolic resin,and Ni nanoparticles were added into the phenolic resin to change the electric conductivity of Si3N4-PyC composite ceramics.Dielectric permittivity,electromagnetic interference(EMI) shielding and absorption properties of Si3N4—PyC composite ceramics were studied as a function of Ni content at 8.2—12.4 GHz(X-band).When Ni nanoparticles were added into phenolic resin,the electric conductivity of the prepared composite ceramics decreased with increasing Ni content,which was attributed to the decrease of graphitization degree of PyC.The decrease in electric conductivity led to the decrease in both permittivity and EMI shielding effectiveness.Since too high permittivity is harmful to the impendence match and results in the strong reflection,the electromagnetic wave absorption property of Si3N4—PyC composite ceramics increases with increasing Ni content.When the content of Ni nanoparticles added into phenolic resin was 2 wt%,the composite ceramics possessed the lowest electric conductivity and displayed the most excellent absorption property with a minimum reflection loss as low as -28.9 dB. | Xuan Hao Xiaowei Yin Litong Zhang Laifei Cheng | 2013 | Journal of Materials Science & Technology2013，29，3： | 2 |
| 20 | Mechanical behavior of C/SiC T-section under pulling load显示文摘For the C/SiC T-section structures, fabrication defects such as pores and local delaminations can be easily formed in the intersection zone which significantly affect the load bearing capacity. In this work, the mechanical behavior of C/SiC T-section under pulling load was investigated, and especially the delamination behavior was studied by introducing the cohesive zone model into the finite element modeling. It was found that for C/SiC T-section under pulling load, the maximum critical delamination load was about1075 N in the present work, and the interface delamination was the main failure mode. It was verified that the effective interfacial strength influenced the critical delamination load, and the strain energy release affected the delamination behavior of the T-section specimen. The failure mechanisms of C/SiC T-section under pulling load depend on the interface bonding states. When the interface is well bonded,the failure mechanisms mainly include matrix stripping, matrix fracture and fiber breakage. Otherwise,only the matrix stripping can be found at the interface of the C/SiC T-section specimen. | Zongbei He Bo Chen Yi Zhang Yongsheng Liu Litong Zhang | 2019 | Journal of Materials Science & Technology2019，35，12： | 2 |
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