Equilibrium Studies of the System'(Fe,Co)O'–(Fe,Co)3O4 by Solid-State emf Measurements in the Temperature Range 970 to 1370 K

The equilibrium reaction 3'(Fe, Co)O'( ss ) +1/2O₂ ( g ) ⇄ (Fe, Co)₃O₄( ss ) was studied in the temperature range 970 to 1370 K for seven different total compositions of molar ratios 0.5 < Fe/(Fe + Co) ≤ 1.0. The equilibrium pressures of oxygen were determined by using galvanic cells incorporating calcia stabilized zirconia as solid electrolyte and the Fe/Co ratios in the solid-solution phases by wavelength dispersive spectrometry microprobe analyses. The activities of 'FeO' in the cobaltowüstite phase were then derived from the experimental results obtained.     

补偿式光纤F—P干涉仪的信号处理系统

本文提出并研制成补偿式光纤F-P干涉仪信号处理系统,提出了用来测量微小位移信号的三种方法及电路,即透射峰时间间隔测量法、光脉冲基波幅度测量法(精密整流法)、鉴相法。测试结果表明:时间间隔测量法,它的最大灵敏度达到0.26纳米/微秒;精密整流法,最大灵敏度为2.38纳米/伏特。     

智能同步广播激励器及其标频

使用智能同步广播激励器,并采用CCTV传输的1MHz标频信号,就有可能实现自适应相位跟踪同步广播。这将大大节省中波段的频率资源。     

TiO_2-聚乙烯复合膜的制备及红外光谱对其膜层结构的表征

开发了以Ｔｉ４＋为桥联剂制备无机－有机复合膜的新方法以自制的硅藻土多孔陶瓷为基膜（支撑体），使用浸涂法－热致相转化法相结合制备了ＴｉＯ２－聚乙烯复合膜，并用红外光谱表征了复合膜层与层之间的结合方式和强度，支撑体中的ＳｉＯ２通过Ｔｉ４＋与聚乙烯的分子之间形成了新的化合物型膜层     

三氯化镧催化合成缩酮

以固体三氯化镧为催化剂,以环己酮缩1,2-丙二醇为探针反应,考察了缩酮反应,得到的优化条件为:环己酮0．1 mol,1,2-丙二醇0．12 mol,催化剂用量1．0 g,反应时间90 min,反应温度150℃,10 mL甲苯作带水剂,并在此条件下合成了多种缩酮。实验表明三氯化镧在缩酮反应中具有良好的催化活性,缩酮收率可达90％以上。     

Effect of Post Annealing on the Microstructure and Magnetic Properties of NdFeB/α-Fe/NdFeB Thin Films

A series of nanocomposite thin films, composed of Nd2Fe14B and α-Fe, has been prepared by DC-magnetron sputtering combined ion beam sputtering onto Si (100) substrates. The effects of post annealing on the microstructure and magnetic properties of [NdFeB/α-Fe/NdFeB]-type thin films have been investigated. The X-ray diffraction (XRD) study showed that annealing of the films for 30min at temperatures 550,600,650,700℃ resulted in the appearance of diffraction peaks, characteristic for Nd2Fe14B tetragonal structure, α-Fe and Nd2O3 phases. The investigation using the Vibrating Sample Magnetometer (VSM) with a maximum applied field of 2 T indicated that with the increase of the annealing temperature, the magnetic properties of the multilayer films were improved and reached peak value at 650℃ (Hci=41.72kA·m-1, Mr/Ms=0.4, (BH)max=30.35kJ·m-3), after which the magnetic properties were decreased greatly. Along with the increase of the thickness of α-Fe layer from Tα-Fe16nm, the coercivity Hci, saturation magnetization Ms, and remanence ratio Mr/Ms all declined. As the Atomic Force Microscope (AFM) indicated, after being annealed at 650℃ for 30min, the sample was showed fine surface morphology with grain size 60nm≤dα-Fe≤80nm and 100nm≤dNdFeB≤150nm.     

Synthesis of Iron-Based Laves Phase Containing Praseodymium Magnetostrictive Materials

The synthesis and magnetostriction of PrxTb1-x.Fe2, PrxTb1-x Fe2BO2 and PrxTb1-x（Fe0.6Co0.4）2 alloys were investigated in this study. The addition of boron or cobalt atom in PrxTb1-xFe2 could effectively prevent the formation of non-cubic phases, and Pr concentration limit was successfully increased from 0.2 to 0.4. X-ray step scanning for the PrxTb1-xFe2BO2 and PrxTb1-x（Fe0.6Co0.4）2 alloys showed that PrFe2 possessed a large spontaneous magnetostriction λ1111.     

Mobilfunkanlage; (Wartungs-)Container; Anwendungsbereich der BauO; anzeigepflichtige Baumaßnahmen; Bauanzeigeverfahren; subjektiv-öffentliche Nachbarrechte

Dem Nachbarn kommt im Bauanzeigeverfahren keine Parteistellung zu. Die Errichtung eines (hier: 18 m hohen) Stahlrohrgittermastes mit Paneel- und Richtfunkantennen ist bauanzeigepflichtig. Die Errichtung eines (hier: 4,5 m × 2,4 m × 2,9 m gro?en Wartungs-) Containers für eine Mobilfunkanlage unterliegt nicht dem Anwendungsbereich der tir BauO.     

江西长力转炉开发60Si2Mn弹簧钢工艺研制

介绍了江西长力转炉研发60Si2Mn弹簧扁钢的过程,以及60Si2Mn弹簧钢的转炉生产工艺及研制结果.     

Oriented colorings of 2-outerplanar graphs

A graph G is 2-outerplanar if it has a planar embedding such that the subgraph obtained by removing the vertices of the outer face is outerplanar. The oriented chromatic number of an oriented graph H is defined as the minimum order of an oriented graph H^′ such that H has a homomorphism to H^′. In this paper, we prove that 2-outerplanar graphs are 4-degenerate. We also show that oriented 2-outerplanar graphs have a homomorphism to the Paley tournament QR₆₇, which implies that their (strong) oriented chromatic number is at most 67.