Reassure on accuracy of laser tracker based on single point measurement model

2015 ◽  
Author(s):  
Xin Yang ◽  
Lijuan Li ◽  
Yan h. Zhao ◽  
Caoguo Hua
Author(s):  
L.S. Koh ◽  
H. Marks ◽  
L.K. Ross ◽  
C.M. Chua ◽  
J.C.H. Phang

Abstract A Laser Timing Probe (LTP) system which uses a noninvasive 1.3 µm continuous wave (CW) laser with frequency mapping and single point measurement capabilities is described. The frequency mapping modes facilitate the localization of signal maxima for subsequent single point measurements. Measurements of waveforms with long delays and 50 ps response time from NMOS and PMOS transistors are also shown.


2014 ◽  
Vol 800-801 ◽  
pp. 771-775
Author(s):  
Feng Yun Yu

Design and calculation of dual-use spiral mobile devices for horizontal and vertical, according to the principle of screw drive meet the needs of the weak magnetic detection technology. The device consists of the support part, guide part and transmission part, simple structure, may be supporting the use with weak magnetic equipment for the handheld single point measurement, and drive probe mobile to complete the measurement and maintained liftoff value unchanged in mobile. Carry on a large number of weak magnetic detection experiments using the device, the results proved that this probe mobile device easy to use, reliable mobile precision to meet the testing requirements.


2012 ◽  
Vol 9 (1) ◽  
pp. 1-24 ◽  
Author(s):  
Silvia Romero ◽  
Graham Gal ◽  
Theodore J. Mock ◽  
Miklos A. Vasarhelyi

ABSTRACT During the last five centuries, the traditional accounting model has evolved into a wide set of business practices and measurement conventions. In general, these models have served business well, but are now gradually losing relevance. The Public Company Accounting Oversight Board (PCAOB) (2011) consideration of a more informative audit report and the Financial Accounting Standards Board (FASB) (2011) reconsideration of a more precise concept of income clearly illustrate a growing disconnect with the traditional model. This paper explores the possibility of enhancing financial reporting with a wider frame of business representations and measures. It begins by discussing business measurement from the perspective of measurement theory, and then considers the potential that contemporary information technology and data processing offers by providing more relevant, timely, and reliable financial information. For example, some of the possible changes could be implemented through modified XBRL tagging. In this paper, we discuss the limitations of the current reporting system and propose a generic business measurement model that includes three layers: the disclosure value chain, the point measurement of each datum, and the level of desired contingency measurement. The disclosure value chain includes environmental conditions, business plans, lead actions that augment current business activities measurement and, where feasible, information on consequent events. In examining the point measurement of each datum, we argue that measures often are not deterministic, but are contingent on time factors, the nature of the decision being supported, the level of desired precision, related future events, and inherent uncertainty. We present two structures combining these parameters. Finally, our explorations suggest that the level of the desired contingency measurement determines the appropriate information structure and that this measurement is needed in each specific decision context.


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