贵港航运枢纽工程通过交工验收

广西西江航运建设二期贵港航运枢纽工程交工验收会于2001年1月10日至12日在贵港举行。 　　本次验收工作由区交通厅主持，参加单位有工程指挥部、监理部、设计单位、施工单位及运行单位。在验收会上，各方代表对广西电力院的设计工作给予了很高的评价。区交通厅质量监督站对本工程的质量等级核定为优良。经过一年多试运行考验，所有设备运行指标均达到设计要求。1999年2月1日至2000年11月30日发电量已达9.16亿kW*h，创电费收入2.437亿元，开始发挥巨大的工程效益。 　　 (撰稿　刘益祥)     

THERMAL DEBINDING OF A NEW BINDER

ＴＨＥＲＭＡＬＤＥＢＩＮＤＩＮＧＯＦＡＮＥＷＢＩＮＤＥＲ①ＺｈｏｕＪｉｃｈｅｎｇ，ＨｕａｎｇＢａｉｙｕｎ，ＷｕＥｎｘｉ，ＹｕＬｉｇｏｎｇ，ＱｕＸｕａｎｈｕｉＮａｔｉｏｎａｌＫｅｙＬａｂｏｒａｔｏｒｙｆｏｒＰｏｗｄｅｒＭｅｔａｌｕｒｇｙ，Ｃｅｎｔｒａ...     

Effect of a direct magnetic field on the interfacial microstructure between molten aluminium and solid iron

Many processing techniques, such as hot dip aluminizing, bimetal formation, liquid metal corrosion, cementing, welding and diffusion bonding, are basically dependent on interfacial reactions [1-3]. It is therefore important to investigate the formation and growth of intermetallic layers at the interface. There have been several studies carried out to examine chemical compositions and growth kinetics of intermetallic layers in the Al-Fe system [4-9]. Most authors have come to an agreement that…     

Advances in the research of nitrogen containing stainless steels

The current status of nitrogen containing stainless steels at home and aboard has been introduced. The function and existing forms of nitrogen in the stainless steels, influence of nitrogen on mechanical properties and anti-corrosion properties as well as the application of nitrogen containing cast stainless steels were discussed in this paper. It is clear that nitrogen will be a potential and important alloying element in stainless steels. And Argon Oxygen Decarbonization (AOD) refining can provide an advanced manufacture process for nitrogen containing stainless steels with ultra-low- carbon and high cleanliness.     

EFFECT OF COMPOSITION ON PHYSICAL PROPERTIES OF AMORPHOUS Fe-Si-B ALLOYS

ＥＦＦＥＣＴＯＦＣＯＭＰＯＳＩＴＩＯＮＯＮＰＨＹＳＩＣＡＬＰＲＯＰＥＲＴＩＥＳＯＦＡＭＯＲＰＨＯＵＳＦｅＳｉＢＡＬＬＯＹＳ①ＷａｎｇＬｉｎｇｌｉｎｇ，ＺｈａｏＬｉｈｕａ，ＨｕＷａｎｇｙｕ，ＷｕＬｉｊｕｎ，ＺｈａｎｇＢａｎｇｗｅｉＤｅｐａｒｔｍｅ...     

Discussion on compact mechanism of air-stream and synchro-formed clamp plate impact molding

1 .Introduction Due to many advantages such as simple molding machine structure high compact compaction of sand mold, speed and well-distributed the air-stream impact molding method However, has been extensively used in production.when this molding method is applied to mold complicated pattern with wider top surface and deep     

元搜索引擎中排序融合算法的优化研究

为了提高元搜索引擎的查准率,提出一种改进的排序融合算法.首先,根据搜索返回结果中文档的位序以及包含该文档的成员系统数目计算文档初始评分;其次,引入BM25F算法模型计算文档的相似度;最后,增设域名缓存表统计文档的URL分值;综合上述三项计算值,得到文档的最终评分并作为排序依据.实验结果表明,所提出的优化算法显著提高了元搜索引擎系统的查准率.     

一种高效的小时延故障模拟方法

随着集成电路工艺尺寸不断缩小,电路规模不断增大,要得到很高的小时延故障覆盖率所需的测试向量越来越多,致使小时延故障模拟成本越来越高.为了降低模拟成本,提出一个高效的小时延故障模拟器.模拟方法中引入新的波形表达方式,按电路结构的拓扑顺序进行分级模拟,最后可得到每个故障的检测区间,并且应用时延故障概率分布来计算故障覆盖率.实验结果表明,此方法能大幅降低模拟时间和内存消耗.     

考虑逻辑门延时的冗余固定故障检测方法

提出利用瞬态电流测试(IDDT Testing)方法检测数字电路中的冗余固定故障。检测时采用双向量模式,充分考虑逻辑门的延时特性。针对两类不同的冗余固定故障,分别给出了激活故障的算法,在此基础上再对故障效应进行传播。SPICE模拟实验结果表明,该方法能有效地区分正常电路与存在冗余故障的电路,可以作为电压测试方法的一种有益的补充。     

1α-羟基去氢表雄酮的合成与应用研究进展

1α-羟基去氢表雄酮是合成马沙骨化醇的起始原料,也是合成维生素D类衍生物关键中间体和原料,具有良好的市场前景。标题化合物的合成研究已有半个多世纪的历史,但适于工业化的合成工艺尚待于开发。按起始原料不同对标题化合物合成方法和应用进行综述。合成标题化合物起始原料主要有1,4-雄烯二酮和去氢表雄酮。以去氢表雄酮为原料的合成方法又分为化学法和微生物法。