Results 11 to 20 of about 61,101 (268)
Application of Atraumatic Fiber Optic Perforation Technology for Directional Well
Cejing jishu, 2023 The permanent optical fiber dynamic monitoring outside casing has become an important direction in the development of smart oilfields. As the key supporting content, the atraumatic fiber optic perforation technology is very important.
LIU Ping +5 more
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Eccentricity Correction of Acoustic Variable Density Logging and Its Application
Cejing jishu, 2023 In order to solve the problems of acoustic wave amplitude reduction and inaccurate cementing quality evaluation caused by the eccentricity of acoustic variable density instrument in logging process, the principle of eccentricity influence of acoustic ...
LIU Dongming +6 more
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A converse to the log-log law for Martingales [PDF]
Journal of the Australian Mathematical Society, 1974 For sums of independent and identically distributed random variables xn, the HartmanWintner law of the iterated logarithm is equivalent to xn ∈ L2. We show that this is also true when the xn, form a stationary, ergodic martingale difference sequence. This is accomplished by extending a theorem of Volker Strassen to the present context.
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, 2007 While logging events is becoming increasingly common in computing, in communication and in collaborative environments, log systems need to satisfy increasingly challenging (if not conflicting) requirements. In this paper we propose a high-level framework for modeling log systems, and reasoning about them.
Etalle, Sandro +2 more
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Design and Performance Test of ENT2465 Long-Life Neutron Tube
He huaxue yu fangshe huaxueThe neutron tube is the core component of the controllable neutron source logging instrument. Its working stability, temperature resistance, neutron yield and other indicators have an important impact on the working performance of instrument. At present,
LIU Ze-wei +9 more
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To Log or Not to Log? SWOT Analysis of Self-Tracking [PDF]
, 2016 With more and more wearable devices and smartphone apps being released that are capable of unobtrusively recording various aspects of our life, we are currently witnessing the emergence of a new trend. Followers of this trend rely on these apps and devices to track their every day activities and to gain insights into their personal well-being. Although
Li, N., Hopfgartner, F.
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A Method for Evaluating the Digital Precision of Induction Logging Tools
Cejing jishuFor an induction tool, its digital precision is critical for ultimate accuracy in actual measurements, and it actually determines the dynamic range of the resistivity, especially the high-resistivities.
ZHAO Yanwei +6 more
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Research on Sensor Based on Optical Fiber Sensing for Acoustic Remote Detection
Cejing jishuIn view of the problems faced by traditional acoustic long-range detection tools in logging, such as “can not going down, uncertainty and data discontinuity”, the research on acoustic long-range detection technology based on optical fiber sensing is ...
HE Quanlong +8 more
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Log Log Laws for Empirical Measures
The Annals of Probability, 1980 Let $(X, \mathscr{A}, P)$ be a probability space and $\mathscr{C}$ a collection of measurable sets. Suppose $\mathscr{C}$ is a Donsker class, i.e., the central limit theorem for empirical measures holds uniformly on $\mathscr{C}$, in a suitable sense. Suppose also that suitable ($P\varepsilon$-Suslin) measurability conditions hold.
Kuelbs, J., Dudley, R. M.
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Application of the Shift-Subtract Method in the Drilling Fluid Pressure Wave Signal Processing
Cejing jishuTo address the technical challenges of low signal-to-noise ratio and high decoding error rates in high-rate (rate≥10 bit/s) conditions for downhole continuous wave transmission systems, research is conducted on fluid pressure wave signal processing and ...
LIANG Yao +7 more
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