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Improving the fatigue endurance of lead zirconate titanate thin films through PbO interfacial modification

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Rare Metals 2011年第1期30卷 68-71页

作者： LEI Rong REN Yanbo QIAO Lijie GU Hongwei YUE Zhenxing XIE Dan CAO Jiangli institute for Advanced Materials and Technology University of Science and Technology Beijing Beijing 100083 China institute of Electrical Engineering Chinese Academy of Sciences Beijing 100190 China State Key Laboratory of New Ceramic and Fine Processing Tsinghua University Beijing 100084 China institute of Microelectronics Tsinghua University Beijing 100084 China

The effects of the modification of electrode/ceramic interfaces through a chemical solution deposition-derived PbO buffer layer on the fatigue endurance of lead zirconate titanate（PZT） thin films were *** grain size and the surface roughness of the PZT films increased through PbO interfacial ***,the PZT films with PbO interfacial modification had a better crystallographic structure and no evident secondary phases were *** the remanent polarization and dielectric constant were reduced,the fatigue endurance was *** on the results,the mechanism for the fatigue endurance improvement was discussed.

关键词： ferroelectric thin films fatigue lead zirconate titanate chemical modification lead oxide

Cloning and comparative study of trehalose-6-phosphate synthase genes in seaweed

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Cloning and comparative study of trehalose-6-phosphate synth...

Bi-mel-scale frequency cepstrum and its application in telephone speech recognition

中国海洋湖沼学会藻类学分会第七届会员大会暨第十四次学术讨论会

作者： Ge Zhao~1 Yanbin Feng~(1,2. Jinsong Xuan~1 Fuxin Wang~1 Lixian Qiao~(1,2. Wei Wang~1 Manli Weng~1 Delin Duan~(3**) Bin Wang~(1**) 1 institute of Genetics and Developmental Biology,chinese {2. of sciences,beijing 100101 2.College of Life sciences,Qingdao Agricultural University,Qingdao 2.66109 3.institute of Oceanology,chinese {2. of sciences,Qingdao 2.6071

Trchalose is a non-reducing disaccharide of two glucose units that functions as a stress protection metabolite in the stabilization of biological structures under stress tolerance in various *** biosynthesis of trehalosc is catalyzed by a two-step process that involves trehalosc-6-phosphate synthasc(TPS)and trchalosc-6-phosphate phosphatase(TPP).In this study,the full-length cDNA sequence(32.9 bp)of the trehalose-6-phosphate synthase gene of Porphyra yezoensis(PyTPS)was isolated by RACE(rapid amplification of eDNA ends)-PCR. PyTPS encodes the TPS protein of 908 amino acids with a calculated molecular mass of 101786 Daltons,consisting of a TPS domain at the N-terminus and a putative TPP domain at the *** putative TPS sequence was deposited in GenBank(NCBI)with the accession numbers AY72.671(mRNA)and AAW2.916(protein).The homology alignment for the TPS proteins from five different organisms indicates that the most closely related sequences to PyTPS were those from OsTPS and AtTPS,whereas the most distant sequence to PyTPS was the one from EcOtsAB.

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来源： cnki会议评论

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chinese Journal of Acoustics 1998年第3期17卷 234-243页

作者： CHEN Jingdong XU Bo HUANG Taiyi(National Laboratory of Pattern Recognition, institute of Automation chinese academy of sciences {2. 100080)

A new kind of feature for speech recognition, called Bi-Mel-scale Frequency Cepstrum (BMFC) is proposed. To calculate the BMFC, the speech signal is first segmented into short intervals and the bispectrum of each segment is estimated; then the bispectrum is smoothed by two-dimensional mel-scale inverse filter bank; finally, the bi-mel-scale frequency cepstrum coefficients are obtained by decorrelating the outputs of the filter bank with twodimensional Discrete Cosine Transform (DCT). Preliminary experiments show that the new feature can improve the performance of a telephone speech recognizer and is more robust to white noise than the conventional LPCC (Linear Prediction Coefficients) and MFCC (Mel-scale Frequency Cepstrum Coefficents) used in speech recognition

关键词： LPCC IEEE BMFC

Regional Seismic Characteristics of the 9 October 2.06 North Korean Nuclear Test

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Regional Seismic Characteristics of the 9 October 2006 North...

AGE DETERMINATION ON BOUNDARIES OF THE SINIAN, TRIASSIC, JURASSIC, CRETACEOUS AND TERTIARY STRATA IN NORTHERN CHINA

中国科学院地质与地球物理研究所2.08学术年会

作者： Lian-Feng Zhao,Xiao-Bi Xie,Wei-Min Wang,and Zhen-Xing Yao institute of geology and {2. chinese academy of sciences 19 Beituchengxilu,Chaoyang District beijing 10002.,China institute of {2. and Planetary Physics University of California at Santa Cruz 1156 High Street Santa Cruz,California 95064 institute of Tibetan Plateau Research chinese academy of sciences 18 Shuangqinglu,Haidian District beijing 100085,China

We investigate the regional seismic signature of the 9 October 2.06 North Korean nuclear *** regional data for the nuclear test and a group of earthquakes close to the test site were obtained between December 2.00 and November *** distances from the stations to the test site are between 371 and 1153 *** first use these regional events to calibrate the Lg-wave magnitude in the *** the network is used to calculate m(Lg) = 3.93 for the North Korean nuclear *** a modified fully coupled magnitude-yield relation,the yield of the North Korean nuclear test is estimated to be 0.48 *** of large uncertainties in the source depth,the estimate is *** P/S-type spectral ratios Pg/Lg,Pn/Lg,and Pn/Sn are calculated for the nuclear explosion and a group of earthquakes close to the test *** frequencies above 2.Hz,the network-averaged P/S spectral ratios clearly separate the 9 October 2.06 explosion from the regional *** result indicates that a single-blast explosion in the North Korea region shows different seismic characteristics from an *** well-coupled single-blast explosion detonated in this region with yield similar to that for the North Korean nuclear test has a large probability of being identified by a regional seismic network such as the one adopted in this study.

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chinese Science Bulletin 1988年第2期33卷 137-142页

作者：王东方 Shenyang institute of geology and Mineral Resources Chinese Academy of Geological Sciences

1. The Lower Boundary of the Sinian System It has been established that the Liaonan group, including the Wuhangshan and Jinxian subgroups, directly overlies the Xihe group. Sabelliditidae was discovered in the Changli... 详细信息

关键词： shale subgroups Tertiary dating Triassic Cretaceous strata quartz sedimentation Jurassic

用于FK506类小分子化合物筛选的细胞模型的建立

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生物化学与生物物理进展 2004年第10期31卷 895-901页

作者：肖鹤于鸣李松沈倍奋黎燕军事医学科学院基础医学研究所北京100850 军事医学科学院毒物药物研究所北京100850

建立FKBP12./Fas双聚体可诱导细胞凋亡生物效应的细胞模型 ,为FK5 0 6类小分子化合药物的初步筛选提供一个可应用的技术平台 .首先利用RT PCR方法钓取人源性Fas胞浆区基因 ,测序鉴定正确后 ,插入到载体pC4M FV2.中 ,构建 pC4M FV2./Fas... 详细信息

建立FKBP12./Fas双聚体可诱导细胞凋亡生物效应的细胞模型 ,为FK5 0 6类小分子化合药物的初步筛选提供一个可应用的技术平台 .首先利用RT PCR方法钓取人源性Fas胞浆区基因 ,测序鉴定正确后 ,插入到载体pC4M FV2.中 ,构建 pC4M FV2./Fas表达质粒 .然后将Myr FKBP12. Fas融合基因从pC4M FV2./Fas质粒克隆进 pEGFP N1中 .最后将重组质粒pEGFP N1/FKBP12. Fas转染进HEK2.93细胞 ,并利用G4 18筛选融合基因FKBP12. Fas稳定表达的细胞株 .实验结果显示 ,阳性化合物AP2.0 187作用 4～ 6h后 ,稳定转染的靶细胞发生凋亡 ,基因组呈现典型的“DNALadder” ,而FKBP12.天然结合蛋白FK5 0 6可竞争性地阻断这种阳性药物诱导的细胞凋亡 .研究提示 :所构建的细胞模型 ,可用于以FKBP12.靶标、基于FK5 0 6空间构型设计合成的FK5 0 6类小分子化合药物的初步筛选 .

关键词：融合表达细胞模型细胞凋亡竞争抑制

Perturbed solution of sea-air oscillator for the El Nino/ La Nina-Southern Oscillation mechanism

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Acta Oceanologica Sinica 2009年第3期28卷 1-4页

作者： ZHOU Xianchun LIN Yihua WANG Hui MO Jiaqi College of Electronic and Information Engineering Nanjing University of information Science and Technology Nanjing 210044 China Division of Computational Science E-Institutes of Shanghai Universities at SJTU Shanghai 200240 China State Key Laboratory of Numerical Modeling for Atmospheric sciences and Geophysical Fluid Dynamics Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China National Marine Environmental Forecastins Center Beijing 100081 China Department of Mathematics Anhui Normal University Wuhu 241000 China

A class of coupled system of the E1 Nino/La Nina-Southern Oscillation （ENSO） mechanism is studied. Using the perturbed theory, the asymptotic expansions of the solution for ENSO model are obtained and the asymptotic... 详细信息

关键词： nonlinear perturbation theory E1 Nino/La Nina-Southern Oscillation model

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FH型腐植酸树脂的研制及其吸附特性

燃料化学学报 1990年第2期18卷 149-157页

作者：王兰巴音中国科学院地理研究所

FH型腐植酸树脂系以风化煤腐植酸为主要原料,添加褐藻酸,用钙盐一步胶凝成型,在低温下缩合干燥而成。通过正交试验和方差分析确定FH树脂的最佳工艺条件,在该条件下合成的树脂吸附容量大、使用寿命长。抗Ca^(2.)、Mg^(2.)的干扰能力和选... 详细信息

FH型腐植酸树脂系以风化煤腐植酸为主要原料,添加褐藻酸,用钙盐一步胶凝成型,在低温下缩合干燥而成。通过正交试验和方差分析确定FH树脂的最佳工艺条件,在该条件下合成的树脂吸附容量大、使用寿命长。抗Ca^(2.)、Mg^(2.)的干扰能力和选择性吸附能力强。保持FH树脂吸附性能的主要因素是酸洗脱和钙盐转型。FH树脂中的活性基团能与重金属离子进行离子交换、络合(或螫合)、表面吸附反应。

关键词：腐植酸树脂吸附性重金属离子

Establishment of trophic continuum in the food web of the Yellow Sea and East China Sea ecosystem: Insight from carbon and nitrogen stable isotopes

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Science China(Life sciences) 2005年第6期48卷 531-539页

作者： CAI Deling1, LI Hongyan2. TANG Qisheng3 & SUN Yao3 1. Key Laboratory of Marine Sedimentology & Environment geology, SOA, First institute of Oceanography, State Oceanic Administration, Qingdao 2.6061, China 2. Ocean University of China, Qingdao 2.6003, China 3. Yellow Sea Fisheries Research institute, chinese academy of Fishery sciences, Qingdao 2.6071, China 1. Key Laboratory of Marine Sedimentology & Environment geology SOA First Institute of Oceanography State Oceanic Administration 266061 Qingdao China 2. Ocean University of China 266003 Qingdao China 3. Yellow Sea Fisheries Research institute Chinese Academy of Fishery Sciences 266071 Qingdao China

Stable carbon and nitrogen isotope ratios (δ13C and δ15N) are used to study the trophic structure of food web in the Yellow Sea and East China Sea ecosystem. The trophic con-tinuum of pelagic food web from phytoplankton to top preyer was elementarily established, and a trophic structure diagram in the Yellow Sea and East China Sea was outlined in combination with carbon isotopic data of benthic organisms, which is basically consistent with and makes some improvements on the simplified Yellow Sea food web and the trophic structure diagram drawn based on the biomass of main resource population during 1985―1986. This result indicates that the stable isotope method is a potential useful means for further studying the complete marine food web trophic continuum from viruses to top predators and food web stability.

关键词： food web, trophic continuum, carbon isotope, nitrogen isotope, Yellow Sea, East China Sea.