本文首先梳理章太炎《訄书》'初刻本'与'重订本'之外较少提及的《訄书原刻手写底本》(潘景郑氏原藏)之基本文献学信息。同时利用上述三种《訄书》的文字改动以及异同点的系谱,并结合《检论》等著作分析章太炎在清末民...本文首先梳理章太炎《訄书》'初刻本'与'重订本'之外较少提及的《訄书原刻手写底本》(潘景郑氏原藏)之基本文献学信息。同时利用上述三种《訄书》的文字改动以及异同点的系谱,并结合《检论》等著作分析章太炎在清末民初对经今文'公羊学'、'西洋'和'日本'思想的三重焦虑感。这种焦虑感的表征之一即是对拉克伯里(Terrien de Lacouperie)中国人种'西来说'说的取舍态度,体现在《訄书原刻手写底本》等著作中的文字增删不单是回应强势的西洋话语,亦糅合了如何对待不可回避的'他者'(日本东洋学说)。展开更多
A series of copper manganese oxides were prepared using a selective etching technique with various amounts of ammonia added during the co-precipitation process. The effect of the ammonia etching on the structure and c...A series of copper manganese oxides were prepared using a selective etching technique with various amounts of ammonia added during the co-precipitation process. The effect of the ammonia etching on the structure and catalytic properties of the copper manganese oxides was investigated using elemental analysis, nitrogen physisorption, X-ray powder diffraction, scanning and transmission electron microscopy, X-ray photoelectron spectroscopy, H2 temperature-programmed reduc- tion, and Oz temperature-programmed desorption combined with catalytic oxidation of CO. It was found that ammonia can selectively remove copper species from the copper manganese oxides, which correspondingly generates more defects in these oxides. An oxygen spillover from the man- ganese to the copper species was observed by H2 temperature-programmed desorption, indicating that ammonia etching enhanced the mobility of lattice oxygen species in these oxides. The Oz tem- perature-programmed desorption measurements further revealed that ammonia etching improved the ability of these oxides to release lattice oxygen. The improvement in redox properties of the copper manganese oxides following ammonia etching was associated with enhanced catalytic performance for CO oxidation.展开更多
To accelerate the kinetics of the oxygen reduction reaction(ORR)in proton exchange membrane fuel cells,ultrafine Pt nanoparticles modified with trace amounts of cobalt were fabricated and decorated on carbon black thr...To accelerate the kinetics of the oxygen reduction reaction(ORR)in proton exchange membrane fuel cells,ultrafine Pt nanoparticles modified with trace amounts of cobalt were fabricated and decorated on carbon black through a strategy involving modified glycol reduction and chemical etching.The obtained Pt36Co/C catalyst exhibits a much larger electrochemical surface area(ECSA)and an improved ORR electrocatalytic activity compared to commercial Pt/C.Moreover,an electrode prepared with Pt36Co/C was further evaluated under H2-air single cell test conditions,and exhibited a maximum specific power density of 10.27 W mgPt^-1,which is 1.61 times higher than that of a conventional Pt/C electrode and also competitive with most state-of-the-art Pt-based architectures.In addition,the changes in ECSA,power density,and reacting resistance during the accelerated degradation process further demonstrate the enhanced durability of the Pt36Co/C electrode.The superior performance observed in this work can be attributed to the synergy between the ultrasmall size and homogeneous distribution of catalyst nanoparticles,bimetallic ligand and electronic effects,and the dissolution of unstable Co with the rearrangement of surface structure brought about by acid etching.Furthermore,the accessible raw materials and simplified operating procedures involved in the fabrication process would result in great cost-effectiveness for practical applications of PEMFCs.展开更多
In this paper,we establish an invariance principle for ρ^--mixing random sequences under some moment condition.The result improve and extend the relevant result of Wu（2003）.
Dip-pen nanolithography is a new scanning probe lithography (SPL) technique based on atomic force microscopy (AFM), and now has made a great progress. The process of dip-pen lithography involves the adsorption of ink ...Dip-pen nanolithography is a new scanning probe lithography (SPL) technique based on atomic force microscopy (AFM), and now has made a great progress. The process of dip-pen lithography involves the adsorption of ink molecules on AFM tip, the formation of water meniscus, the transport of ink molecules, and diffusion of ink molecules on the substrate. More factors such as temperature, humidity, tip, scanning speed and so on will influence the process of dip-pen lithography. The paper analyzes in detail the mechanism of this technique, introduces synthetically the latest development, including electrochemical DPN, more-mode DPN, multiple DPN, multi-probe array DPN and so on. Finally, the paper describes the characteristics and the application of DPN.展开更多
Ion beam technology is used widely in many fields such as electric, material, optics, medicine, biology and so on. At the same time, it brings some huge technological effects and economical benefits, especially for th...Ion beam technology is used widely in many fields such as electric, material, optics, medicine, biology and so on. At the same time, it brings some huge technological effects and economical benefits, especially for the optical applocations. According for the technology, the properties of high accuarate spectral analyzer also can be improved by manufacturing the lage-area holographic ion beam eathing（HIBE） grating. Simultaneously, as one of the parts of ion beam technology, the developments of ion beam sources have some important effects to content the demands of ion beam technology such as large ion beam flux, excellent optical qualities. In this paper, an ion beam source called inductively coupled plasma（ICP） ion beam source was introduced, and the extractor system, the application prospect were also discussed.展开更多
Objective To observe the immediate analgesic effect of acupuncture at Shiqizhui （十七椎）, etc. for primary dysmenorrhea （PD）. Methods Ninety- three cases of PD were selected, who were given acupuncture at ShfqTzhu...Objective To observe the immediate analgesic effect of acupuncture at Shiqizhui （十七椎）, etc. for primary dysmenorrhea （PD）. Methods Ninety- three cases of PD were selected, who were given acupuncture at ShfqTzhui, Diji （地机 SP 8）, SQnyinjiao （三阴交. SP 6） and Ciliao （次髎 BE 32） for 30 min. The score of visual analogue scale （VAS） was observed at immediate time before treatment, and 5, 20, 20 and 30 min after needle insertion, as well as 30, 60 and 220 min after needle withdrawal. Results Compared with immediate time before treatment, there were significant differences of the VAS score in the PD patients from 5 min after needle insertion to 220 min after needle withdrawal （all P〈O.01）. The acupuncture analgesic effect had appeared since 5 min after needle insertion, and as time went by it gradually increased until 220 min after needle withdrawal. Conclusion Acupuncture at Shiqizhui, etc. for primary dysmenorrhea has obviously immediate analgesic effect, which has important clinical significance.展开更多
Quantitative paleotemperature records are vital not only for verifying and improving the accuracy of climate model simulations, but also for estimating the amplitude of temperature variability under global warming sce...Quantitative paleotemperature records are vital not only for verifying and improving the accuracy of climate model simulations, but also for estimating the amplitude of temperature variability under global warming scenarios. The Tibetan Plateau(TP) affects atmospheric circulation patterns due to its unique geographical location and high elevation, and studies of the mechanisms of climate change on the TP are potentially extremely valuable for understanding the relationship of the region with the global climate system. With the development of biomarker-based proxies, it is possible to use lake sediments to quantitatively reconstruct past temperature variability. The source of Glycerol Dialkyl Glycerol Tetraethers(GDGTs) in lake sediments is complex, and their distribution is controlled by both climatic and environmental factors. In this work, we sampled the surface sediments of 27 lakes on the TP and in addition obtained surface soil samples from six of the lake catchments. We analyzed the factors that influence GDGT distribution in the lake sediments, and established quantitative relationship between GDGTs and Mean Annual Air Temperature(MAAT). Our principal findings are as follows: the majority of GDGTs in the lake sediments are b GDGTs, followed by crenarchaeol and GDGT-0. In most of the lakes there were no significant differences between the GDGT distribution within the lake sediments and the soils in the same catchment, which indicates that the contribution of terrestrial material is important. i GDGTs in lake sediments are mainly influenced by water chemistry parameters(p H and salinity), and that in small lakes on the TP, TEX_(86) may act as a potential proxy for lake p H; however, in contrast b GDGTs in the lake sediments are mainly controlled by climatic factors. Based on the GDGT distribution in the lake sediments, we used proxies(MBT, CBT) and the fractional abundance of b GDGTs(f_(abun)) to establish calibrations between GDGTs and MAAT, respectively, which potentially provide the basis for paleoclimatic reconstruction on the TP.展开更多
文摘本文首先梳理章太炎《訄书》'初刻本'与'重订本'之外较少提及的《訄书原刻手写底本》(潘景郑氏原藏)之基本文献学信息。同时利用上述三种《訄书》的文字改动以及异同点的系谱,并结合《检论》等著作分析章太炎在清末民初对经今文'公羊学'、'西洋'和'日本'思想的三重焦虑感。这种焦虑感的表征之一即是对拉克伯里(Terrien de Lacouperie)中国人种'西来说'说的取舍态度,体现在《訄书原刻手写底本》等著作中的文字增删不单是回应强势的西洋话语,亦糅合了如何对待不可回避的'他者'(日本东洋学说)。
基金supported by the National Basic Research Program of China (973 Program,2013CB934104)the China Postdoctoral Science Foundation(2014M560202)~~
文摘A series of copper manganese oxides were prepared using a selective etching technique with various amounts of ammonia added during the co-precipitation process. The effect of the ammonia etching on the structure and catalytic properties of the copper manganese oxides was investigated using elemental analysis, nitrogen physisorption, X-ray powder diffraction, scanning and transmission electron microscopy, X-ray photoelectron spectroscopy, H2 temperature-programmed reduc- tion, and Oz temperature-programmed desorption combined with catalytic oxidation of CO. It was found that ammonia can selectively remove copper species from the copper manganese oxides, which correspondingly generates more defects in these oxides. An oxygen spillover from the man- ganese to the copper species was observed by H2 temperature-programmed desorption, indicating that ammonia etching enhanced the mobility of lattice oxygen species in these oxides. The Oz tem- perature-programmed desorption measurements further revealed that ammonia etching improved the ability of these oxides to release lattice oxygen. The improvement in redox properties of the copper manganese oxides following ammonia etching was associated with enhanced catalytic performance for CO oxidation.
基金supported by the National Major Research Project(2016YFB0101208)the National Natural Science Foundation of China(21576257)+1 种基金the Natural Science Foundation-Liaoning United Fund(U1508202)the Strategic Priority Research Program of the Chinese Academy of Sciences(XDB06050303)~~
文摘To accelerate the kinetics of the oxygen reduction reaction(ORR)in proton exchange membrane fuel cells,ultrafine Pt nanoparticles modified with trace amounts of cobalt were fabricated and decorated on carbon black through a strategy involving modified glycol reduction and chemical etching.The obtained Pt36Co/C catalyst exhibits a much larger electrochemical surface area(ECSA)and an improved ORR electrocatalytic activity compared to commercial Pt/C.Moreover,an electrode prepared with Pt36Co/C was further evaluated under H2-air single cell test conditions,and exhibited a maximum specific power density of 10.27 W mgPt^-1,which is 1.61 times higher than that of a conventional Pt/C electrode and also competitive with most state-of-the-art Pt-based architectures.In addition,the changes in ECSA,power density,and reacting resistance during the accelerated degradation process further demonstrate the enhanced durability of the Pt36Co/C electrode.The superior performance observed in this work can be attributed to the synergy between the ultrasmall size and homogeneous distribution of catalyst nanoparticles,bimetallic ligand and electronic effects,and the dissolution of unstable Co with the rearrangement of surface structure brought about by acid etching.Furthermore,the accessible raw materials and simplified operating procedures involved in the fabrication process would result in great cost-effectiveness for practical applications of PEMFCs.
基金Supported by the National Natural Science Foundation of China（10661006） Supported by the New Century Guangxi Ten-hundred-thousand Talents Project（2005214）
文摘In this paper,we establish an invariance principle for ρ^--mixing random sequences under some moment condition.The result improve and extend the relevant result of Wu（2003）.
基金Foundation of Education of Zhejiang Province, China ( No.20060470).
文摘Dip-pen nanolithography is a new scanning probe lithography (SPL) technique based on atomic force microscopy (AFM), and now has made a great progress. The process of dip-pen lithography involves the adsorption of ink molecules on AFM tip, the formation of water meniscus, the transport of ink molecules, and diffusion of ink molecules on the substrate. More factors such as temperature, humidity, tip, scanning speed and so on will influence the process of dip-pen lithography. The paper analyzes in detail the mechanism of this technique, introduces synthetically the latest development, including electrochemical DPN, more-mode DPN, multiple DPN, multi-probe array DPN and so on. Finally, the paper describes the characteristics and the application of DPN.
文摘Ion beam technology is used widely in many fields such as electric, material, optics, medicine, biology and so on. At the same time, it brings some huge technological effects and economical benefits, especially for the optical applocations. According for the technology, the properties of high accuarate spectral analyzer also can be improved by manufacturing the lage-area holographic ion beam eathing（HIBE） grating. Simultaneously, as one of the parts of ion beam technology, the developments of ion beam sources have some important effects to content the demands of ion beam technology such as large ion beam flux, excellent optical qualities. In this paper, an ion beam source called inductively coupled plasma（ICP） ion beam source was introduced, and the extractor system, the application prospect were also discussed.
基金Supported by Project TCM of National Key Technology R&D Program for the 11th Five-year Plan:2006BAI12B06
文摘Objective To observe the immediate analgesic effect of acupuncture at Shiqizhui （十七椎）, etc. for primary dysmenorrhea （PD）. Methods Ninety- three cases of PD were selected, who were given acupuncture at ShfqTzhui, Diji （地机 SP 8）, SQnyinjiao （三阴交. SP 6） and Ciliao （次髎 BE 32） for 30 min. The score of visual analogue scale （VAS） was observed at immediate time before treatment, and 5, 20, 20 and 30 min after needle insertion, as well as 30, 60 and 220 min after needle withdrawal. Results Compared with immediate time before treatment, there were significant differences of the VAS score in the PD patients from 5 min after needle insertion to 220 min after needle withdrawal （all P〈O.01）. The acupuncture analgesic effect had appeared since 5 min after needle insertion, and as time went by it gradually increased until 220 min after needle withdrawal. Conclusion Acupuncture at Shiqizhui, etc. for primary dysmenorrhea has obviously immediate analgesic effect, which has important clinical significance.
基金supported by the National Natural Science Foundation of China (Grant Nos. 41072120 & 41321061)
文摘Quantitative paleotemperature records are vital not only for verifying and improving the accuracy of climate model simulations, but also for estimating the amplitude of temperature variability under global warming scenarios. The Tibetan Plateau(TP) affects atmospheric circulation patterns due to its unique geographical location and high elevation, and studies of the mechanisms of climate change on the TP are potentially extremely valuable for understanding the relationship of the region with the global climate system. With the development of biomarker-based proxies, it is possible to use lake sediments to quantitatively reconstruct past temperature variability. The source of Glycerol Dialkyl Glycerol Tetraethers(GDGTs) in lake sediments is complex, and their distribution is controlled by both climatic and environmental factors. In this work, we sampled the surface sediments of 27 lakes on the TP and in addition obtained surface soil samples from six of the lake catchments. We analyzed the factors that influence GDGT distribution in the lake sediments, and established quantitative relationship between GDGTs and Mean Annual Air Temperature(MAAT). Our principal findings are as follows: the majority of GDGTs in the lake sediments are b GDGTs, followed by crenarchaeol and GDGT-0. In most of the lakes there were no significant differences between the GDGT distribution within the lake sediments and the soils in the same catchment, which indicates that the contribution of terrestrial material is important. i GDGTs in lake sediments are mainly influenced by water chemistry parameters(p H and salinity), and that in small lakes on the TP, TEX_(86) may act as a potential proxy for lake p H; however, in contrast b GDGTs in the lake sediments are mainly controlled by climatic factors. Based on the GDGT distribution in the lake sediments, we used proxies(MBT, CBT) and the fractional abundance of b GDGTs(f_(abun)) to establish calibrations between GDGTs and MAAT, respectively, which potentially provide the basis for paleoclimatic reconstruction on the TP.
