长钢9号高炉开炉达产实践

详细介绍了长钢9号高炉的开炉及达产情况。     

Is it a short‐memory,long‐memory,or permanently Granger‐causation influence?

Exploring the Granger‐causation relationship is an important and interesting topic in the field of econometrics. In the traditional model we usually apply the short‐memory style to exhibit the relationship, but in practice there could be other different influence patterns. Besides the short‐memory relationship, Chen (2006) demonstrates a long‐memory relationship, in which a useful approach is provided for estimation where the time series are not necessarily fractionally co‐integrated. In that paper two different relationships (short‐memory and long‐memory relationship) are regarded whereby the influence flow is decayed by geometric, or cutting off, or harmonic sequences. However, it limits the model to the stationary relationship. This paper extends the influence flow to a non‐stationary relationship where the limitation is on ?0.5 ≤ d ≤ 1.0 and it can be used to detect whether the influence decays off (?0.5 ≤ d < 0.5) or is permanent (0.5 ≤ d ≤ 1.0). Copyright © 2008 John Wiley & Sons, Ltd.     

拟南芥AtWNK9基因的定位及表达分析

AtWNK9为拟南芥WNK（With no lysine kinase）激酶家族成员，其功能尚不清楚.采用生物信息学和生物学实验相结合的方法，对AtWNK9蛋白结构、亚细胞定位、启动子元件、基因表达模式进行了分析.研究发现，AtWNK9定位在细胞核中；该基因在拟南芥根中高效表达，其表达受ABA，NaCl、葡萄糖、热和冷等非生物胁迫处理强烈诱导.结果表明，AtWNK9为非生物胁迫反应相关基因，并可能参与根的生长发育.     

9,9-双(甲氧甲基)芴制备及性能研究

研究9,9-双(甲氧甲基)芴的制备反应及其性能.9,9-双(甲氧甲基)芴的合成分两步:首先,芴与多聚甲醛反应合成9,9-双(羟甲基)芴;接着采用三相相转移催化法由9,9-双(羟甲基)芴制备9,9-双(甲氧甲基)芴.用9,9-双(甲氧甲基)芴做给电子体制备Ziegler-Natta催化剂催化丙烯聚合,催化剂的活性为每g催化剂催化130 kg丙烯,聚合物等规度为97%.提出一条清洁生产的工业合成工艺,并建立了生产装置,生产出了合格的9,9-双(甲氧甲基)芴.     

掺Cu的SrBi2Ta2O9薄膜的非线性光学特性的研究

以SrBi2Ta2O9陶瓷和高纯Cu片作为靶材,利用射频磁控溅射方法在双面抛光的石英基片上制备了掺Cu金属颗粒的SrBi2Ta2O9复合薄膜.用XRD和AFM表征了薄膜的结晶性能和表面形貌;利用单光束Z扫描技术在波长532 nm处测量了薄膜的非线性光学特性,其三阶非线性光学极化率的实部Reχ(3)=2.26×10-9esu,虚部Imχ(3)=0.62×10-9esu.     

Waugh结构(NH4)6[NiMo9O32]·8H2O 的合成及表征

以(NH4)6Mo7O24·4H2O,NiSO4·6H2O,(NH4)2S2O8为原料合成了(NH4)6[NiMo9O32]·8H2O(九钼镍杂多酸铵),利用化学分析、差热-热重、红外光谱、紫外光谱等方法对其进行了元素分析及结构的表征.     

新型TB9钛合金屈服强度的应变率效应

TB9钛合金具有良好的力学性能,被广泛应用于航空航天领域,其材料强度随服役过程中应力作用的加载速率变化而发生改变。本文采用三次真空自耗熔炼工艺制备TB9钛合金材料,并对其开展了室温拉伸和压缩试验,研究了该材料在应变率0.0005-0.1 s-1范围内的力学性能及其变形行为,讨论了应变率对该材料压缩和拉伸屈服强度的影响。结果表明：应变率由0.0005 s-1升高至0.1 s-1时,TB9钛合金材料的平均压缩屈服强度由955.96 MPa升高至1 090.94 MPa,平均拉伸屈服强度由971.01 MPa升高至1 096.31 MPa,压缩屈服强度应变率敏感系数为0.02273,拉伸屈服强度应变率敏感系数为0.02110;随着应变率的增大,TB9钛合金拉伸试件断面韧窝尺寸及深度均会变小,这是由于应变率大时,瞬间局部能量增加,裂纹萌生和扩展速度加快所致。此外,本文采用线性函数拟合了TB9钛合金材料室温下屈服强度增强因子与自然对数应变率之间的关系,可用于预测TB9钛合金在工程应用中的力学行为。     

巴西陆稻IAPAR9抗旱的根系性状

与其抗旱性呈极显著正相关;IAPAR9有中等发达程度的根系;干旱使根系内导管面积及数目大幅降低,但严重干旱（40%田间持水量）时,IAPAR9仍能维持一定生长量,因为IAPAR9根内导管面积较大,这是其抗旱性较好的物质基础之一.     

Frequency of the mtDNA 9-bp deletion in Chinese ethnic groups

The 9-bp deletion in the COIl/tRNALys intergenic region (region V) of human mitochondrial DNA was screened in 1521 Chinese from 16 ethnic groups and 9 Han geographic groups. The highest frequency was found in populations of Miao (32.4%) and Bouyei (30.8%) from Guizhou Province, whereas no deletion was found in Kazak population in Xinjiang. In the populations of Wa and Lahu from Yunnan Province, Uygur and Mongolian from Xinjiang,the deletion frequency was relatively low ( ≤ 4 % ), while in the remaining 18 groups, the frequency was moderate (6 % ～ 24% ). Except those Hans in Xinjiang, Guizhou and that reported in Taiwan, the deletion frequency in the Han geo graphic groups did not show a substantial difference. However, the deletion frequency in some ethnic groups from the same geographic region or with similar ethnohistory did not show similarity. A general decrease tendency in the deletion frequency was found from south to north and from coastal to inland. The frequency of the 9-bp deletion was approximate ly 17.20% in all Chinese we studied and reported elsewhere. Additionally, 4 individuals were found to carry the tripli cation of 9-bp segment in region V; one individual had X. II type of 9-bp deletion; and no other length polymorphisms were detected in this region in 27 randomly selected individuals with or without the deletion.