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Effect of Sulfur Contents on Fracture Toughness of Wheel Steels for High Speed Train

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Journal of Iron and Steel Research International 2011年第S1期18卷 366-371页

作者： MA Yue 1,PAN Tao 1,JIANG Bo 2.YANG Cai-fu 1,SU Hang 1,CUI Yin-hui 2.CHEN Gang 2.(1.Division of Structural Materials,Central Iron and Steel Research Institute,Beijing 100081,China 2.Technology Centre,Ma’anshan Iron and Steel Co Ltd.,Ma’anshan 2.3000,Anhui,China) Cent Iron & Steel Res Inst Div Struct Mat Beijing 100081 Peoples R China Maanshan Iron & Steel Co Ltd Ctr Technol Maanshan 243000 Anhui Peoples R China

The effect of different contents of S on fracture toughness of railway wheel steels for high speed train has been *** results show that there are kinds of non-metallic inclusion when O content retaining at about 10×10-6,such as Al 2.O 3 inclusions and Al 2.O 3 +MnS complex inclusions and single MnS *** is connected with S content level in *** toughness of railway steel increase obviously because of Al 2.O 3 covered by MnS around when S content is increase to about 70×*** shows that,after Al 2.O 3 covering by MnS around,stresses around complex inclusion decrease rapidly till disappear when analyzed by tessellated stresses *** is the reason of fracture toughness rise.

关键词： railway wheel steels fracture toughness inclusions tessellated stresses

Influence of modulation ratio on structure and properties of nanoscale ZrB_2.ZrAlN multilayered coatings

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Science China(Technological Sciences) 2010年第3期53卷 772-775页

作者： LI DeJun 1,KANG YuanBin 1,DONG Lei 1,DENG XiangYun 1,LIU Hao 2.&SUN XueLiang 2.1College of Physics and Electronic Information Science,Tianjin Normal University,Tianjin 300387,China 2.Department of Mechanical&Materials Engineering,University of Western Ontario,London ON,Canada College of Physics and Electronic Information Science Tianjin Normal University Tianjin China Department of Mechanical & Materials Engineering University of Western Ontario London Canada

ZrB2.ZrAlN multilayered coatings with various modulation ratios(t ZrB2.t ZrAlN)and constant modulation periods were prepared by magnetron sputtering system at room ***,XRD,surface profiler and nano-indenter were employed to investigate the influences of tZ rB 2.tZrAlNon the microstructure and mechanical properties of the *** interfaces and nanoscale multilayered modulation were confirmed by *** multilayer with modulation period of 40 nm and ratio of 3:1 displayed the highest hardness(36.4 GPa)and critical fracture load(76.477 mN)with lower *** polycrystalline structure and multilayered modulate structure were directly responsible for the enhanced mechanical properties.

关键词： ZrB2.ZrAlN multilayered coating magnetron sputtering modulation ratio nanoscale

Treatment of established colon carcinoma-bearing mice by dendritic cells pulsed with lysates of heat-treated tumor cells

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Science China(Life Sciences) 2009年第9期52卷 831-835页

作者： YING MinGang1,ZHEN QiuHong2.LIU Sheng1,GONG FuSheng2.& XIE YunQing2.1 Abdominal Surgery,Fujian Provincial Tumor Hospital,Teaching Hospital of Fujian Medical University,Fuzhou 350014,China 2.Surgical Laboratory,Fujian Provincial Tumor Hospital,Teaching Hospital of Fujian Medical University,Fuzhou 350014,China Abdominal Surgery Fujian Provincial Tumor Hospital Teaching Hospital of Fujian Medical University Fuzhou China Surgical Laboratory Fujian Provincial Tumor Hospital Teaching Hospital of Fujian Medical University Fuzhou China

To investigate the therapeutic effect of dendritic cells pulsed with lysates of heat-treated CT2. colon carcinoma cells. Bone marrow-derived DCs were pulsed with lysates of heat-treated tumor cells and were used to immunize BALB/c mice with established colon carcinoma. Cytotoxic T lymphocyte (CTL) response was detected. The therapeutic effect induced by DCs was observed by tumor weight and survival time. DCs pulsed with lysates of heat-treated tumor cells markedly induced specific cytotoxic activity of CTLs. Tumor growth in the immunized BALB/c mice was significantly inhibited and the survival time of the tumor-bearing mice was prolonged. DCs pulsed with lysates of heat-treated tumor cells have an observable therapeutic effect on established colon carcinoma-bearing mice.

关键词： dendritic cell heat treatment colon carcinoma

Study on the Value of Forest to Conserve Soil and Water in Beijing

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Chinese Forestry Science and Technology 2002年第2期1卷 83-87页

作者： LI Zhongkui ZHOU Bingbing1. World Forestry Institute, China Academy of Forestry. P. R. China 2. Beijing Forestry Bureau, Beijing, P. R. China

Forest has a strongfunction in storing water, conserving soil and protecting farmland. In the study, based on fleld management and survey, these effects of forest in Beijing were determined and quantified. According to the principles and methodology of environment economics, the values of forest to conserve soil and water were accounted. The result shows that the total value of forest to conserve soil and water in Beijing is as much as 112..58×10~8 yuan, in which the value of water storage is 1107.92.10...

关键词： forest value account soil and water conservation

Therapeutical effect of Shengmaisan is determined by the interaction among the three herbs

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Progress in Natural Science:Materials International 2003年第5期 16-20页

作者： TAO Dongliang, XU Yizhuang, ZHENG Aiguo, HUANG Baogui, LI Saijun, HE Xiaoran, WENG Shifu, XU Xiaojie, WU Jinguang , GUO Fanxiu and XU Duanfu (1. State Key Laboratory of Rare Earth Materials Chemistry and Applications, Peking University, Beijing 100871, China 2. Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China) State Key Laboratory of Rare Earth Materials Chemistry and Applications Peking University Beijing 100871 China Institute of Chemistry Chinese Academy of Sciences Beijing 100080 China

Shengmaisan is a recipe of traditional Chinese medicine, which is composed of three herbs. The interaction among the components from the three herbs of Shengmaisan is investigated using FT-IR, Matrix Assistant Laser Desorption/Ionization Time of flight mass spectrometry (MALDI TOF MS) and TEM observation. Interactions among various components from different herbs cause enhancement of the solubility of some component and suppression of the solubility of others. Results from MALDI-TOF MS show that some components found in the decoction from a single herb disappear when different herbs are decocted together. On the other hand, new substances are produced when two and/or three herbs of Shengmaisan are decocted together. TEM showed that vacuoles formed in the decoction from two and/or three herbs of Shengmaisan but did not occur in any decoction from a single herb. This result provides us direct evidence that the solubilized structure is formed by the interaction among the components from different herbs. Th

关键词： TEM FT-IR Shengmaisan interaction.

Identification of Nuclear Factor-κB Responsive Element within the Neuronal Nitric Oxide Synthase Exon If-specific Promoter

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Acta Biochimica et Biophysica Sinica 2007年第4期39卷 247-254页

作者： Yinghui LI~1 Guangyu LI~2.Chunyi LI~1 Yanyan ZHAO~1* 1 Department of Medical Genetics,China Medical University,Shenyang 110001 China 2.Department of Neurosurgery,First Affiliated Hospital,China Medical University,Shenyang 110001,China Department of Medical Genetics China Medical UniversityShenyang 110001 China Department of Neurosurgery First Affiliated Hospital China Medical UniversityShenyang 110001 China

Transcriptional regulation of the neuronal nitric oxide synthase gene(nNOS)is particularlycomplex as 12.distinct transcripts derived from different first exons are expressed in a tissue- and cell-specific *** exon 1f mRNA is relatively highly expressed in nervous system and relies upon exon1f-specific promoter *** conventional and real-time reverse transcription-polymerase chain reaction,we found exon 1f mRNA was the major transcript of the nNOS gene in human neuroblastoma *** analyzed a 1090 bp fragment of 1f promoter by TRANSFAC-TESS and Match softwares andluciferase assay,and found an important positive transcriptional regulation region that contained a putativenuclear factor(NF)-κB binding ***,using electrophoresis mobility shift and chromatinimmunoprecipitation assays,we identified this site to be the NF-κB responsive element,a crucial positiveregulator in the activation of the nNOS 1f *** together,our study identified an NF-κB responsiveelement within nNOS 1f promoter and showed that it plays an important role in the transactivation of nNOS1f mRNA,the major transcript of nNOS in SK-N-SH cells.

关键词： nNOS NF-kB transactivation nervous system

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制备CeO_2.米粉的溶解工艺对比

西南交通大学学报 2004年第5期39卷 696-698页

作者：张喜燕高界铭周世杰张津广西大学物理科学与工程技术学院广西南宁530004 西南交通大学材料科学与与工程学院四川成都610031 重庆工学院材料科学与工程学院重庆400050

通过实验比较制备纳米CeO2.的HCl和HNO3溶解法.结果表明:用HCl溶解法溶解比例不超过2.%,而且原料消耗大,产生氯气等有害气体对环境污染严重,不适合批量生产;用HNO3溶解法,当温度为35～50℃,:VHNO3=0.12.,反应时间60min时,溶解比例大于9... 详细信息

通过实验比较制备纳米CeO2.的HCl和HNO3溶解法.结果表明:用HCl溶解法溶解比例不超过2.%,而且原料消耗大,产生氯气等有害气体对环境污染严重,不适合批量生产;用HNO3溶解法,当温度为35～50℃,:VHNO3=0.12.,反应时间60min时,溶解比例大于90%,并且节省原料,无污HNO3浓度为7.0～8.5mol/L,VH2.2.,得到的纳米粉颗粒均匀(粒径为30～40nm),可用于工业化生产.

关键词：稀土纳米材料 CeO2 溶解工艺

Laminaria gametophyte clone culture and its application in sporeling cultivation

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Acta Oceanologica Sinica 2000年第2期19卷 89-95页

作者： Zhou Zhigang1 Li Dapeng2.Wu Chaoyuan2.Liu Haihang2.(1. Institute of Oceanology, Chinese Academy of Sciences, 7 Nanhai Road, Qingdao 2.6071, China. Prasent address: College of Fishery Science, Shanghai Fisheries University, 334 Jungong Road, Shangha 2. College of Fishery Science Shanghai Fisheries University 334 Jungong Road Shanghai 200090 China

In China, the total annual production of cultured Laminaria japonica reached half million tons in dry weight there few years. The routine sporeling culture technique conducted in the greenhouse took at least three and half months. In such a case, sometimes the sporelings died within a few days due to destructive diseases. In Order to overcome the mentioned problems, a new sporeling culture technique, the clone technique, is developed. The method includes three stead: (1) Gametophyte clone culture. The spores and the gametophytes are cloned in flasks under favorable environments. (2. Sporeling cul ture. Male and female clones are crushed and spread onto a frame to allow the gametophytes to attach to the substrata. The frames are cultured in tanks, and the sporophytes reach 1 cm in length within one and a half months. (3) Outgrowing of the plant. The frames are put in the open sea when seawater temperature decreased to 2.℃. After one month, the sporelings are large enough to be transplanted. It is concluded that the clone technique has the following advantages: (1)Large amount of clones can be produced in a short period of time. (2. Clone seeding method makes it free from the biological rhythm, one can seed the plant anytime all the year round. (3) It takes only one and a half months to complete the process of sporeling cultivation in the greenhouse. At present, this technique is used in the breeding of new strains of Laminaria.

关键词： Clone culture gametophyte Laminaria cultivation nitrate effect phosphate effect sporeling sporophyte

四维可视化多目标寻优方法及其在T型滤波器设计中的应用(英文)

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系统仿真学报 2008年第20期20卷 5563-5568,5572页

作者：伍家驹王文婷杉本英彦李园庭南昌航空大学无损检测技术教育部重点实验室南昌330034 福井大学日本

针对多目标优化设计中存在寻优空间小、计算难度大等问题,提出4维可视化寻优方法,将颜色作为第4变量引入3维坐标系中,分别用三维坐标表示待求自变量,用三维空间诸点的颜色表示目标函数的值。视图中多个切片的同色线集成为空间等值域,获... 详细信息

针对多目标优化设计中存在寻优空间小、计算难度大等问题,提出4维可视化寻优方法,将颜色作为第4变量引入3维坐标系中,分别用三维坐标表示待求自变量,用三维空间诸点的颜色表示目标函数的值。视图中多个切片的同色线集成为空间等值域,获得清晰的4维显性可视化效果,并据图中的交域颜色分布实现多目标寻优。以对逆变器的非对称无源T型低通滤波器进行优化设计为例对该方法进行了详细说明和论证,在扩大的寻优范围内,目标函数的分布状态清晰可见,有效地提高了优化解的稳定性。本方法表明:在寻优过程中应充分考虑目标函数对子变量的敏感性。提供了数学证明,介绍了使用本方法的设计准则,以及用于定量比对的实验数据。

关键词： 4维可视化多目标寻优色图 T型滤波器