架空输电导线覆冰防舞装置--扰流防舞器

架空输电导线的覆冰舞动是一种低频、大振幅的自激振动，严重威胁着架空输电线路的安全。文章对导线舞动的模式、产生条件及防舞方法进行了概述，介绍了一种由具有刚性、耐腐蚀性和热塑性的非金属或金属材料预绞成型的架空输电导线覆冰防舞装置——扰流防舞器的组成及工作原因，并给出了其实际应用效果。     

调匝式自动补偿消弧装置调谐测量原理研究

针对调匝式自动补偿消弧装置现有调谐方法测量精度差、不能适应在牵手变电站中并联运行等问题,提出了利用谐振法结合曲线拟合法测量系统电容电流的方法。该方法测量精度高,调档数目少,能自动并联,无需相互通信,适合在各种场合并联运行。模拟电网试验和现场运行试验结果令人满意。     

用独立分量分析消除工频通信中的谐波干扰

通信信号在配电网传输中，其背景信号必然含有大量的谐波成分，这给通信信号的检测带来极大的困难。文中首先介绍了基于配电网的双向工频通信系统，并根据双向工频通信的信号特征，提出了基于独立分量分析的谐波消除方法。该方法在消除谐波干扰的同时，几乎对有用信号成分未有任何破坏影响。还通过MATLAB仿真对此方法进行了验证，结果良好。     

矩形直肋二维稳态导热的解析解及其分析

为了准确地给出将矩形直肋二维导热问题简化成一维问题的条件，利用分离变量法求解矩形直肋二维稳态导热模型，包括端部散热和绝热两种情况。比较解析解的两种不同的表达式，发现它们基本上是等价的。研究在各种无量纲参数条件下直肋的温度分布和热流，将二维模型所得的结果同一维模型的结果进行了比较，分析了各个无量纲参数对二维解与一维解之间的偏差的影响。在此基础之上，明确了影响一维简化假设成立的两个无量纲参数——HIδ．Bi成的具体取值范围。     

Recovering limonite from Australia iron ores by flocculation-high intensity magnetic separation

Successful recovery of limonite from iron fines was achieved by using flocculation-high intensity magnetic separation （FIMS） and adding hydrolyzed and causticized flocculants according to the characteristic of iron fines. The separation results of the three iron samples are as follows： iron grade 66.77%- 67.98% and the recovery of iron 69.26%-70.70% by the FIMS process with flocculants. The comparative results show that under the same separation conditions the F1MS process can effectively increase the recovery of iron by 10. 97%- 15.73%. The flowsheet results confirm the reliability of the process in a SHP high intensity magnetic separator. The concentrate product can he used as raw materials for direct reduction iron-smelting. The hydrolyzed and causticized flocculants can selectively flocculate fine feebly-magnetic iron mineral particles to increase their apparent separation sizes. The larger the separation size, the stronger the magnetic force. By comparing the separation results of the three samples it is found that among the three samples the higher the limonite content, the better the separation result. This means that the separation result relates closely to the flocculation process and the adding pattern of the flocculant.     

Selective recognition in molecularly imprinted polymer and its chromatographic characterization for cinchonine

A molecularly imprinting polymer (MIP) was synthesized via bulk polymerization under different conditions using anti-ague drug cinchonine (CN) as template. Infrared spectra (IR) results show that the template CN and functional monomer α-methyl acrylic acid (MAA) formed complexes before polymerization and the structure of complexes was simulated by Hyperchem. The results indicate that there are hydrogen bond or ionic bond between functional monomer and template molecule in acetonitrile solution. The MIP made in cold-initiated photo-polymerization has higher separation performance than that in the therm-initiated polymerization. The separation of the isomers CN and cinchonidine (CD) can be successfully obtained when its separate factor α reaches 1.82. Scatchard analysis suggests that the MIP recognizing CN with two classes of binding sites. The partition coefficient K _{d, 1} and apparent maximum number n _{max, 1} of binding sites with high affinity are 131.43 μmol/L and 58.90 μmol/g, respectively, while K _{d, 2} and n _{max, 2} of binding sites with low affinity are 2.32 mmol/L and 169.08 mmol/g, respectively. Foundation item: Project(2004035085) supported by the Postdoctoral Science Foundation of China; project(04JJ3080) supported by the Natural Science Foundation of Hunan Province     

Size Depending Separation of HAP:Eu Nanoparticles in Dispersed Sol

1Introduction Hydroxyapatite(Ca10(PO4)6(OH)2)isanimportant biomaterialthatiswidelyusedassubstituteorfillingma terialforscleroustissuesduetoitsgoodbiocompatibility andosteoconductivity[1,2].Inordertoinvestigatethein teractionsbetweenHAPnanoparticleswithana…     

Preparation of Laminin-apatite-polymer Composites Using Metastable Calcium Phosphate Solutions

1Introduction Themostimportantrequirementofapercutaneous deviceisthepreventionofbacterialinfectionthroughtheinterfacebetweenthematerialandtheskin.Therefore,a percutaneousdevicehastoadherefirmlytoskintissueandpreventepidermaldowngrowth.Previously,Aokietalp…     

ZnO基纳米电子材料研究进展

纳米ZnO的许多优异性能使其成为人们研究的热点并得到广泛应用.ZnO是一种同时具有半导体和压电双重特性的材料.运用不同的工艺,目前已生长出纳米线(棒)、纳米带、纳米环、四角形纳米结构、纳米笼、纳米螺旋等多种特殊形态的纳米ZnO.由这些许多独特的形态,可以看出纳米ZnO是纳米材料家族中可以生长出的结构最多样的成员之一.这些纳米结构在光电、传导、传感以及生化等不同领域有很多潜在的新颖的应用前景.     

一种多向侧抽芯注射模设计

为满足一种小型塑件注射成型时的多向侧抽芯要求,避免模具结构复杂化,设计了一套多向侧抽芯注射模,该模具采用一套侧抽芯装置实现了多向侧抽芯功能,借助开合模运动完成了各向侧型芯的复位、锁紧及抽芯等动作,经实践检验切实可行.