活性炭吸附法分离铼钼的研究

介绍了活性炭吸附法分离铼和钼 ,实验表明调整吸附液的pH值能使铼钼有效分离 ,当pH >8.2时 ,分离系数SRe Mo　　 >3 0 42 ,铼的吸附符合Freundlich等温式。     

Co3O4负载纳米Au催化剂的制备

利用共沉淀法（CP）和沉积-沉淀法（DP）制备了Au／C0304催化剂，考察了制备条件及不同制备方法对金粒子大小的影响。结果表明，负载量为1wt％Au／Co3O4金粒子最小，分散度最好，而焙烧温度太高不利于金粒子的分散，另外，DP法制备的金粒子比CP法制备的要小。     

可膨胀石墨催化合成醋酸丁酯

可膨胀石墨对醋酸丁酯的合成具有较高的催化活性。最佳条件是正丁醇与醋酸的摩尔比为1：1．15，催化剂用量为醇和酸总质量的5．59％，反应时间55min，醋酸丁酯收率可达98％以上。     

CoMoO4负载Mo-V-Cr-Bi氧化物催化剂上甲烷部分氧化的研究

研究了CoMoO4负载Mo-V-Cr-Bi氧化物催化剂上甲烷部分氧化反应,发现反应存在一转折温度,当反应温度低于此温度时,CO是主要产物,而部分氧化产物甲醇的选择性低于20%,而当反应温度高于此温度时,CO的选择性大大降低,而CO2的选择性大大升高,主要产物变为CO2,甲醇的选择性降为0。在O2完全反应的时候,总会有H2生成,特别当反应温度高于转折温度的时候,H2的生成量大大增加。     

我国人力资源管理外包研究

企业人力资源管理是企业管理职能的重要内容,是管理成本大的一项工作。通过专业的人力资源管理外包公司可以实现人力资源管理的规模经济,为企业提供更加专业的服务,降低企业人力资源管理成本,对提高企业经济效益和竞争能力都具有非常重要的意义。     

基于图形表达的基因序列模糊聚类应用研究

给出了一种新的非退化的基因图形三维表达方法,这一表达方法不仅避免了图形的重叠和交叉,同时还保留了序列的生物学特征.利用这种表达方法对H5N1病毒基因序列进行数字特征的提取,并引入基于多维PFS判别函数进行模糊聚类分析应用.在聚类分析过程中直接利用数字特征作为源数据,分析结果表明,利用该图形表达建立基因序列数字特征矩阵进行的聚类分析具有一定的合理性.     

High cycle fatigue and fracture behavior of 2124-T851 aluminum alloy

The high cycle fatigue properties and fracture behavior of 2124-T851 aluminum alloy were investigated roundly, including the fatigue crack growth rate, fracture toughness and fatigue S--N curve. Furthermore, the fatigue crack growth rate was analyzed by fitting the curves. And the microstructure of the alloy was studied using by optical microscopy, transmission electron microscopy and X-ray diffractometry, scanning electron microscop1/2 The results show that the fatigue strength and the fracture toughness of 2124-T851 thick plate are 243 MPa and 29.6 MPa.m at room temperature and R=0. 1, respectively. At high cycle fatigue condition, the characteristics of fatigue facture were observed obviously. And the higher the stress amplitude, the wider the space between the fatigue striations, the faster the rate of fatigue crack developing and going into the intermittent fracture area and the greater the ratio between the intermittent fracture area and the whole fracture area.     

Microstructures and properties of Sn-Ag-Cu lead-flee solder alloys containing La

Trace amounts of La were utilized to improve the melting behaviors, microstructures, tensile properties and microhardness of Sn-3.0Ag-0.5Cu lead-free solder alloy. La has little effect on the melting behavior of Sn-3.0Ag-0.5Cu alloy according to the differential thermal analysis （DTA） tests. The X-ray diffraction （XRD） patterns show that β-Sn, Ag3Sn and Cu6Sn5 coexist in the as-cast solder alloys and LaSn3 phases emerge when adding 0.4% La. The microstructures modified by La are more uniform and much finer than that of baseline alloy, and the coarse LaSn3 particles with complex dendrites are observed by optical microscopy （OM） and scanning electron microscopy （SEM） when the addition of La is up to 0.4%. The composition of the LaSn3 phases is identified by energy-dispersive spectroscopy （EDS）. There are considerable improvements in mechanical properties with 0.05% and 0.1% addition, but degenerations by adding 0.4%La. The Vickers microhardness of β-Sn and eutectic area are both enhanced with the addition of La and the microhardness of LaSn3 is much larger than those of β-Sn and eutectic area.     

Hot compressive deformation behavior and constitutive relationship of Al-Zn-Mg-Zr alloy with trace amounts of Sc

Abstract： The hot deformation behaviors of AI-Zn-Mg-Sc-Zr alloy were investigated in a temperature range of 340-500℃ and a strain rate range of 0.001-10 s 1 using uniaxial compression test on Gleeble-1500 thermal simulation machine. The results show that the flow stress increases with increasing strain and tends to be constant after a peak value. The flow stress increases with increasing strain rate and decreases with increasing deformation temperature. The phenomenon of dynamic recovery and dynamic recrystallization can be observed by microstructural evolutions. Based on the hyperbolic Arrhenius-type equation, the true stress-true strain data from the tests were employed to establish the constitutive equation considering the effect of the true strain on material constants （α, β, Q, n and A）, which reveals the dependence of the flow stress on strain, strain rate and deformation temperature. The predicted stress-strain curves are in good agreement with experimental results, which confirms that the developed constitutive equations are suitable to research the hot deformation behaviors of Al-Zn-Mg-Sc-Zr alloy.     

浅谈电力企业计量检测体系的运行

2005年3月江苏省电力公司盐城供电公司顺利取得了国家质检总局颁发的《完善计量检测体系合格证书》,成为江苏省电力企业首家取得该证书的单位.这是国家政府计量行政部门给予企业在计量管理方面达到规定要求的高层次的承认和证明,表明企业的计量检测体系满足ISO10012：2003及JJF1112-2003新标准的要求.下面针对电力企业的特点,就如何贯彻实施计量检测体系新标准与同行进行探讨.