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Search Results: 1 - 10 of 12660 matches for " LUO ShiChun "
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Lithium secondary batteries using an asymmetric sulfonium-based room temperature ionic liquid as a potential electrolyte
ShiChun Luo,ZhengXi Zhang,Li Yang
Chinese Science Bulletin , 2008, DOI: 10.1007/s11434-007-0526-0
Abstract: A new asymmetric sulfonium-based ionic liquid, 1-butyldimethylsulfonium bis(trifluoromethylsulfonyl) imide (S114TFSI), was developed as electrolyte material for lithium secondary battery. Its cathodic potential was a little more positive against the Li/Li+, so vinylene carbonate (VC) was added into the LiTFSI/S114TFSI ionic liquid electrolyte to ensure the formation of a solid electrolyte interface (SEI), which effectively prevented the decomposition of the electrolyte. The properties of the Li/LiMn2O4 cell containing S114TFSI-based electrolyte were studied and the cycle performances were compared to those with a conventional organic electrolyte (1 mol/L LiPF6/DMC:EC=1:1(w/w)) at room temperature. Electrochemical impedance spectroscopy (EIS) and X-ray diffraction (XRD) were conducted to analyze the mechanisms affecting the cell performances at different temperatures. The lithium secondary battery system, using the above ionic liquid electrolyte material, shows good cycle performances and good safety at room temperature, and is worthwhile to further investigate so as to find out the potential application.
Lithium secondary batteries using an asymmetric sulfonium-based room temperature ionic liquid as a potential electrolyte
LUO ShiChun,ZHANG ZhengXi,YANG Li,

科学通报(英文版) , 2008,
Abstract: A new asymmetric sulfonium-based ionic liquid, 1-butyldimethylsulfonium bis(trifluoromethylsulfonyl) imide (S114TFSI), was developed as electrolyte material for lithium secondary battery. Its cathodic po- tential was a little more positive against the Li/Li , so vinylene carbonate (VC) was added into the LiTFSI/S114TFSI ionic liquid electrolyte to ensure the formation of a solid electrolyte interface (SEI), which effectively prevented the decomposition of the electrolyte. The properties of the Li/LiMn2O4 cell containing S114TFSI-based electrolyte were studied and the cycle performances were compared to those with a conventional organic electrolyte (1 mol/L LiPF6/DMC:EC=1:1(w/w)) at room temperature. Electrochemical impedance spectroscopy (EIS) and X-ray diffraction (XRD) were conducted to analyze the mechanisms affecting the cell performances at different temperatures. The lithium secondary bat- tery system, using the above ionic liquid electrolyte material, shows good cycle performances and good safety at room temperature, and is worthwhile to further investigate so as to find out the potential application.
Neural Adaptation Provides Evidence for Categorical Differences in Processing of Faces and Chinese Characters: An ERP Study of the N170
Shimin Fu, Chunliang Feng, Shichun Guo, Yuejia Luo, Raja Parasuraman
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0041103
Abstract: Whether face perception involves domain-specific or domain-general processing is an extensively debated issue. Relative to non-face objects and alphabetical scripts, Chinese characters provide a good contrast to faces because of their structural configuration, requirement for high level of visual expertise to literate Chinese people, and unique appearance and identity for each individual stimulus. To examine potential categorical differences in their neural processing, event-related potentials (ERPs) were recorded to blocked face and Chinese character stimuli. Fast adaptation method was applied to better control for the low-level stimulus difference between faces and Chinese characters. Participants were required to respond to the color of the outer frame in which these stimuli were presented, at either a fast (ISI 650 ms) or slow (ISI 1300 ms) rate, and with an orientation that was either the same or alternated between upright and inverted. Faces elicited a larger and later N170 relative to characters, but the N170 was more left-lateralized for characters relative to the faces. Adaptation-by-rate and adaptation-by-orientation effects were observed on the amplitude of N170, and both were more pronounced for faces relative to characters. Inverted stimuli elicited a later N170 relative to upright stimuli, without amplitude change, and this inversion effect was more pronounced for faces relative to characters. Moreover, faces elicited a larger and later P1 and a larger adaptation-by-rate effect on P1 relative to characters. The adaptation-by-orientation effect was illustrated by a larger P1 under the same relative to the alternated orientation condition. Therefore, evidence from the amplitude and the lateralization of N170, the stimulus inversion effect on N170 latency, and the neural adaptation between faces and Chinese characters on P1 and N170 components support the notion that the processing of faces and Chinese characters involve categorically different neural mechanisms.
Transfer of immunoglobulins through the mammary endothelium and epithelium and in the local lymph node of cows during the initial response after intramammary challenge with E. coli endotoxin
Karin ?stensson, Shichun Lun
Acta Veterinaria Scandinavica , 2008, DOI: 10.1186/1751-0147-50-26
Abstract: The content of IgG1, IgG2, IgM, IgA and albumin (BSA) was examined in peripheral/afferent mammary lymph and lymph leaving the supramammary lymph nodes, and in blood and milk before (0 h) and during 4 hours after intramammary challenge with Esherichia coli endotoxin in 5 cows.Igs increased most rapidly in afferent lymph resulting in higher concentrations than in efferent lymph at postinfusion hour (PIH) 2, contrary to before challenge. Ig concentrations in milk were lower than in lymph; except for IgA at 0 h; and they increased more slowly. Afferent lymph:serum and efferent lymph:serum concentration ratios (CR) of Igs were similar to those of BSA but slightly lower. Milk:afferent lymph (M:A) CRs of each Ig, except for IgG2, showed strikingly different pattern than those of BSA. The M:A CR of IgG1, IgM and IgA were higher than that of BSA before challenge and the CR of IgA and IgG1 remained higher also thereafter. At PIH 2 there was a drop in Ig CRs, except for IgG2, in contrast to the BSA CR which gradually increased. The M:A CR of IgM and Ig A decreased from 0 h to PIH 4, in spite of increasing permeability.The transfer of Igs through the endothelium appeared to be merely a result of diffusion although their large molecular size may hamper the diffusion. The transfer through the epithelium and the Ig concentrations in milk seemed more influenced by selective mechanisms and local sources, respectively. Our observations indicate a selective mechanism in the transfer of IgG1 through the epithelium also in lactating glands, not previously shown; a local synthesis of IgA and possibly of IgM, released primarily into milk, not into tissue fluid; that IgG2 transfer through both barriers is a result of passive diffusion only and that the content of efferent lymph is strongly influenced by IgG1, IgM and IgA in the mammary tissue, brought to the lymph node by afferent lymph.Bovine mastitis has been extensively studied but mainly as reflected in milk and circulating blood. Inve
The Construction of Infinite Families of k-Tight Optimal Double Loop Networks
k紧优双环网的无限族的构造

YANG Shichun,
杨仕椿

系统科学与数学 , 2008,
Abstract: Double loop network is an important topological structure in computer networks and communication. Based on the theory of L-shaped tile, utilizing Chinese remainder theorem and some property of quadratic congruence, a method to construction of k-tight optimal infinite families of double loop networks is given, and the method is different from that in references. It is proved that there exist some k-tight optimal infinite families of double loop networks for every k > 0, where n(t)=3t^{2}+At+B for some B>(k+1)^{2}, A =1,3,5, and the infinite families are infinitesimal for every B. By using this method, we obtain some new k-tight optimal infinite families of double loop networks.
THE NEGATIVE ELECTROPLASTICITY IN THE Zn-5Al ALLOY
Zn—5Al合金反常的电塑性效应

LI Shichun,
李世春

材料研究学报 , 1998,
Abstract: The Zn-5Al eutectic alloy is superplastically deformed in an electric field of 0.3MV.m-1,and displays the negative electroplasticity The effect of electric field on the strain rate is relative to the effect of the surface charges on the voids on the sudece. The electric field produces inductive charges on the sudece of the specimen, which produce5 voids in the sudece and decreases the strain rate of the alloy in deformation.
THE PRELIMINARY REPORT OF NEMERTEANS FROM TAIWAN CHANNEL
台湾海峡纽形动物初报

Sun Shichun,
孙世春

海洋科学 , 1995,
Abstract: Procephalathrix arenarius, Cerebratulina natans, Iwatanemertes piperatus, Quasilineus sinicus, and Panti- nonemertes mortoni are reported from Taiwan Strait for the first time in this paper, all but Iwatanemertes piperatus which was alredy known from Riukiu Islands, are new records of East China Sea.
Phase boundary sliding model controlled by diffusionsolution zone in superplastic deformation
Zhiqiang Shi,Yifu Ye,Shichun Li,Xinying Teng,Huanrong Wang
Chinese Science Bulletin , 2002, DOI: 10.1007/BF02907615
Abstract: With scanning electron microscope (SEM), the surface morphology of phase boundary sliding (PBS) in superplastic deformation (SPD) of Zn-Al alloy and the diffusion behavior of Zn, Al interfaces in their powers’ sintering have been investigated. The results show that Zn-Al eutectoid microstructure can be achieved through their powders’ sintering, and the diffusion characteristic between Zn and Al is just a demonstration of Kirkendall effect, in which Zn can dissolve into Al whereas A1 can hardly dissolve into Zn. During sintering, a diffusion-solution zone α′ has formed and subsequently transformed into a eutectoid microstructure in the cooling process. The superplastic deformation mechanism of Zn-Al eutectic alloy is phase boundary sliding which is controlled by the diffusion-solution zone α′. If the diffusion-solution zone α′ is unsaturated, it will have much more crystal defects and the combination between α′ and phase β is weak, thus the process of phase boundary sliding becomes easily; on the contrary, if the diffusion-solution zone α′ becomes thick and saturated, the sliding will be difficult.
Electrostatic self-assembly Pd particles on Nafion membrane surface to reduce methanol crossover
Haolin Tang,Mu Pan,Shichun Mu,Runzhang Yuan
Chinese Science Bulletin , 2005, DOI: 10.1007/BF02897583
Abstract:
KARST ROCK CLASSIFICATION FOR WEST ANCHOR TUNNEL OF BALINGHE BRIDGE
坝陵河大桥西锚洞岩溶围岩分级

LI Cangsong,WANG Shichun,
李苍松
,王石春

岩石力学与工程学报 , 2009,
Abstract: 坝陵河大桥隧道锚洞工程周边围岩的岩溶较发育,勘察设计阶段确定其围岩级别为II~IV级.根据实际开挖所揭露的岩溶状况,需要调整超前支护和初期支护参数,以保证锚洞施工安全.在岩溶地质预报和一般地下工程岩体质量分级基础上,专门针对围岩为不同岩溶发育状态的岩体进行质量分级修正,建立锚洞岩溶围岩分级的物理模型和数学模型.根据岩体波速测试、岩体抗压强度以及岩溶发育程度修正系数等参数的确定,计算锚洞岩溶围岩级别主要为V级.事实上,在整个锚洞施工过程中,均采用超前小导管、超前锚杆、型钢拱架、挂网及喷射混凝土等强支护措施,锚洞开挖采用台阶法分步开挖.锚洞开挖完毕后对周边的破碎岩体及溶洞进行了注浆加固处理,也就是说,锚洞施工的超前支护和初期支护参数实际均按照V级围岩实施.实践表明,本工程岩溶围岩分级是合理的,对其他同类工程可提供借鉴.
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