复合固定循环指令的混合编程

文章通过分析G71在粗车外径存在的问题,提出了一种G73与G71混合编程的NC编程的新方法,较好地解决了外径加工时出现的零件形状误差的问题.     

Location and output of the labor-managed firm under price discrimination

This paper considers the impact of location on the output effect of third-degree price discrimination. It shows that the price discrimination may increase, decrease or leave total output of the labor-managed firm unchanged even if the demand curves in two separate markets are linear. This result is significantly different from the conventional non-spatial result. It indicates that the location decision of the labor-managed firm has an important influence on the output effect of third-degree price discrimination.Received: April 2002/Accepted: February 2004I am grateful to Professor Tschangho John Kim and an anonymous referee for valuable comments and suggestions that have substantially improved the paper. All remaining errors are my own     

High efficiency arrays of polymer solar cells fabricated by spray‐coating in air

We present bulk heterojunction organic solar cells fabricated by spray‐casting both the PEDOT:PSS hole‐transport layer (HTL) and active PBDTTT‐EFT:PC₇₁BM layers in air. Devices were fabricated in a (6 × 6) array across a large‐area substrate (25 cm²) with each pixel having an active area of 6.45 mm². We show that the film uniformity and operational homogeneity of the devices are excellent. The champion device with spray cast active layer on spin cast PEDOT:PSS had an power conversion efficiency (PCE) of 8.75%, and the best device with spray cast active layer and PEDOT:PSS had a PCE of 8.06%. The impacts of air and light exposure of the active layer on device performance are investigated and found to be detrimental. Copyright © 2015 John Wiley & Sons, Ltd.     

A problem of incentive compatibility in the North Sea petroleum industry

The principal–agent relationship between the governments of the UK and Norway, and the multinational oil companies active in the North Sea petroleum industry is, to some extent, different from a typical principal–agent interaction. For almost three decades, the major criterion for allowing a company to take part in the activity was its previous and planned contribution to the domestic economy by means of applying the highest possible domestic inputs. This study applies mathematical modeling to show that the authorities had the opportunity to offer an incentive scheme to persuade the oil companies to involve domestic suppliers at the governments’ preferred level. Unlike a typical government regulatory framework, which aims to increase efficiency in terms of price and/or quality, the incentive compatible scheme discussed in this paper could, in certain circumstances, generate inefficiency in the daily operation of the oil and gas fields.     

基于FANUC 0i系统数控车床椭圆加工方法的探讨

在数控车床加工中,常常使用宏程序进行椭圆类零件的加工。本文主要介绍了在FANUC 0i系统中,针对椭圆类零件的编程加工提出的3种方法:G71指令加工椭圆、G73指令加工椭圆和G90指令加工椭圆。阐述了3种方法各自的特点和适用范围,并给出了加工程序以供参考。     

Ermittlung der Geb?udeh?he; Geb?udefront; Stiegenhaus

Auch ein nicht als Vorbau ausgebildetes Stiegenhaus, das die Geb?udefront überragt, ist nicht in die Ermittlung der Geb?udeh?he einzubeziehen, wenn die Belichtung der Hauptfenster eines benachbarten Geb?udes dadurch nicht beeintr?chtigt wird.     

可编程控制器在高速曲轴磨床上的应用

介绍的是用三菱Ａ系列可编程控制器在高速曲轴磨床上工件曲轴进行砂轮磨削的一种控制方法。首先介绍高速曲轴磨床上曲轴工件的磨削工艺及三菱Ａ系列可编程控制器中ＡＤ７１定位模块的原理，然后给出ＡＤ７１定位模块的编程方法及结论     

Crystal structure and infrared spectrum of thallium holmium polyphosphate, TIHo(PO3)4

Crystals of thallium-holmium polyphosphate TIHo(PO3)4 were grown by flux method technique and characterized by single crystal X-ray diffraction. Structure of TIHo(PO3)4 was solved for the first time, and it crystallized in the monoclinic P21/n space group with the following unit-cell dimensions: a=1.02225(3) nm, b=0.88536(2) nm, c=1.09541(4) nm, β=105.888(1)°, V=0.95354(5) nm3 and Z=4. The crystal structure was solved from 2174 independent reflections with final R1(F2)=0.0442 and Rw(F<2)=0.0861 refined with 164 parameters. The atomic arrangement could be described as a long chain polyphosphate organization. Holmium atoms had eighffold coordination. The structure of T1Ho(PO3)4 consisted of HoO8 polyhedra sharing oxygen atoms with phosphoric group PO4. Infrared spectrum was investigated at room temperature in the frequencies range, 350-4000 cm-1, showing some characteristic vibration bands of infinite chain structure of PO4 tetrahedra linked by bridging oxygen.     

FD-71型闪烁辐射仪测量天然环境辐射的主要技术性能

FD-71闪烁辐射仪在天然本底调查和建筑材料卫生标准的研究等方面得到了较广泛的应用。从天然环境辐射测量的观点出发,曾报道过用FD-71测量天然环境辐射的读数修正方法和在不同的环境中与高压电离室、塑料闪烁辐射仪比对测量的结果。本文将报道FD-71测量天然环境辐射场所具有的一些主要技术性能,包括探测下限、量程范围、均匀性、重复性、     

U71Mn钢中w[N]对性能影响研究

文章针对包钢生产的U71Mn钢中w[N]偏高的问题,研究了w[N]对钢轨性能的影响。研究表明,钢中w[N]在(50~95)×10-6之间,随着钢中w[N]的上升,钢轨的常规力学性能变化不大,但断裂韧性下降。因此需将U71Mn钢中w[N]控制在较低水平。