A Sampling-Based Approach to Information Recovery

Author(s):  
Junyi Xie ◽  
Jun Yang ◽  
Yuguo Chen ◽  
Haixun Wang ◽  
Philip S. Yu
Keyword(s):  
1996 ◽  
Vol 51 (5-6) ◽  
pp. 337-347 ◽  
Author(s):  
Mariusz Maćkowiak ◽  
Piotr Kątowski

Abstract Two-dimensional zero-field nutation NQR spectroscopy has been used to determine the full quadrupolar tensor of spin - 3/2 nuclei in serveral molecular crystals containing the 3 5 Cl and 7 5 As nuclei. The problems of reconstructing 2D-nutation NQR spectra using conventional methods and the advantages of using implementation of the maximum entropy method (MEM) are analyzed. It is shown that the replacement of conventional Fourier transform by an alternative data processing by MEM in 2D NQR spectroscopy leads to sensitivity improvement, reduction of instrumental artefacts and truncation errors, shortened data acquisition times and suppression of noise, while at the same time increasing the resolution. The effects of off-resonance irradiation in nutation experiments are demonstrated both experimentally and theoretically. It is shown that off-resonance nutation spectroscopy is a useful extension of the conventional on-resonance experiments, thus facilitating the determination of asymmetry parameters in multiple spectrum. The theoretical description of the off-resonance effects in 2D nutation NQR spectroscopy is given, and general exact formulas for the asymmetry parameter are obtained. In off-resonance conditions, the resolution of the nutation NQR spectrum decreases with the spectrometer offset. However, an enhanced resolution can be achieved by using the maximum entropy method in 2D-data reconstruction.


2010 ◽  
Vol 49 (2) ◽  
pp. 163-169
Author(s):  
Guorui Feng ◽  
Zhenxing Qian ◽  
Xinpeng Zhang

2009 ◽  
Vol 20 (3) ◽  
pp. 253-273 ◽  
Author(s):  
Stefan Michel ◽  
David Bowen ◽  
Robert Johnston

PurposeThe keys to effective service recovery are familiar to many throughout industry and academia. Nevertheless, overall customer satisfaction after a failure has not improved, and many managers claim their organizations cannot respond to and fix recurring problems quickly enough. Why does service recovery so often fail and what can managers do about it? This paper aims to address these issues.Design/methodology/approachThe objective is to produce an interdisciplinary summary of the growing literature on service recovery, bringing together what each of the author's domain – management, marketing, and human resources management – has to offer. By contrasting those three perspectives using 141 academic sources, nine tensions between customer, process, and employee recovery are discovered.FindingsIt is argued that service recovery often fails due to the unresolved tensions found between the conflicting perspectives of customer recovery, process recovery, and employee recovery. Therefore, successful service recovery requires the integration of these different perspectives. This is summarized in the following definition: “Service recovery are the integrative actions a company takes to re‐establish customer satisfaction and loyalty after a service failure (customer recovery), to ensure that failure incidents encourage learning and process improvement (process recovery) and to train and reward employees for this purpose (employee recovery).”Practical implicationsManagers are not advised to directly address and solve the nine tensions between customer recovery, process recovery, and employee recovery. Instead, concentrating on the underlying cause of these tensions is recommended. That is, managers should strive to integrate service recovery efforts based upon a “service logic”; a balance of functional subcultures; strategy‐driven resolution of functional differences; data‐based decision making from the seamless collection and sharing of information; recovery metrics and rewards; and development of “T‐shaped” employees with a service, not just functional, mindset.Originality/valueThis paper provides an interdisciplinary view of the difficulties to implement a successful service recovery management. The contribution is twofold. First, specific tensions between customer, process and employee recovery are identified. Second, managers are offered recommendations of how to integrate the diverging perspectives.


Author(s):  
В. Б. Швайченко ◽  
О. П. Гребінь ◽  
Н. Ф. Левенець

Improving the quality of the restored information in the process of restoration and restoration of phonograms.Synthesis of the system model on the basis of analysis of the processes of restoration and restoration of phonograms from media of various types and computer processing. The characteristics of the conceptual model of the restoration and restoration of the phonogram are determined. The structure of the system model of the information recovery process is developed. A lot of concepts and connections between concepts are defined. The structure of the system modeling restoration and restoration of phonograms is defined. A conceptual model of the restoration and restoration process is proposed. The distribution of artifacts over the playback and processing modes of a phonogram is justified. Details of the type of content with features of the effect on the state of the phonogram.The solutions obtained are the basis of the methodology for carrying out the process of restoration and restoration of phonograms by the criterion of sound quality.


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