Fault diagnosis of gearboxes using wavelet support vector machine, least square support vector machine and wavelet packet transform

This work focuses on a method which experimentally recognizes faults of gearboxes using wavelet packet and two support vector machine models. Two wavelet selection criteria are used. Some statistical features of wavelet packet coefficients of vibration signals are selected. The optimal decomposition level of wavelet is selected based on the Maximum Energy to Shannon Entropy ratio criteria. In addition to this, Energy and Shannon Entropy of the wavelet coefficients are used as two new features along with other statistical parameters as input of the classifier. Eventually, the gearbox faults are classified using these statistical features as input to least square support vector machine (LSSVM) and wavelet support vector machine (WSVM). Some kernel functions and multi kernel function as a new method are used with three strategies for multi classification of gearboxes. The results of fault classification demonstrate that the WSVM identified the fault categories of gearbox more accurately and has a better diagnosis performance as compared to the LSSVM

Post trade allocation: how much are bunched orders costing your performance?

Individual trade orders are often bunched into a block order for processing efficiency, where in post execution, they are allocated into individual accounts. Since Regulators have not mandated any specific post trade allocation practice or methodology, entities try to rigorously follow internal policies and procedures to meet the minimum Regulatory ask of being procedurally fair and equitable. However, as many have found over the years, there is no simple solution for post trade allocation between accounts that results in a uniform distribution of returns. Furthermore, in many instances, the divergences between returns do not dissipate with more transactions, and tend to increase in some cases. This paper is the first systematic treatment of trade allocation risk. We shed light on the reasons for return divergence among accounts, and we present a solution that supports uniform allocation of return irrespective of number of accounts and trade sizes.Comment: 16 pages, 2 figures, 12 table

It rings a bell or breeds contempt?: activating background knowledge and reading recall

The present study examined the possible effects of activating background knowledge on reading recall of 20 Iranian EFL learners by giving the experimental participants a text from Persian literature, a culturally-familiar source, and contrasting their key points recall with those of another group of learners who did not know the text origin. Findings revealed that the participants who did not know the source of the text did significantly better than the experimental group who were given the source and the context. While a small-scale study, this study may suggest that using culture-based reading materials may not always help the learners' reading performance. In addition, the activation of background knowledge may result in overreliance on prior knowledge resources and trigger affective barriers such as lack of interest which may be to the detriment of readers' recall

The effect of semantic clustering on the acquisition of quantitative and qualitative knowledge of vocabulary

The present study explored the effects of semantic clustering on the acquisition of vocabulary knowledge. Two methods of vocabulary presentation (and instruction) were taken into account: a) Semantically-related presentation (SRP) which was based on the idea of presenting words in semantic clusters; and b) Semantically-unrelated presentation (SUP) which referred to presenting target words in unrelated sets. The results showed that the learners in the SRP class significantly outperformed their peers in the SUP class in both quantitative and qualitative measures of vocabulary knowledge.In-depth analysis of participants' score variations across levels of vocabulary knowledge also revealed that the SRP method of vocabulary presentation was probably a better facilitator in the learners' progress from a basic familiarity with the target words, to vocabulary knowledge at both reception and production level.The findings of the study are fully discussed and its pedagogical implications for language teachers are drawn upon

Comparison the concepts of sense of place and attachment to place in architectural studies

Today, concepts such as place attachment, sense of place, meaning of place, place identity, and ... has devoted many studies In literature of architecture and urban design particularly in the field of environmental psychology. It is obvious that in all these concepts, various aspects of interaction between human and place and the impact that places have on people has been presented. This paper defines the concepts of sense of place and place attachment and explains the factors that affect them. Sense of place is a comprehensive concept which in it men feels places, percept them and attached meaning to them. Understanding the fundamental aspects of sense of place, can be effective in assess the level of public attachment to places and tendency of people to places. Place attachment refer to emotional and functional bonds between place and people which Interpreted in different scale from a district to a country in Environmental psychology. In this regard different studies point to varied of spatial and human factors. Review the literature, this paper achieves a comprehensive definition of these concepts and then it try to compare them to find their relationship. What will come eventually is that place attachment is one of the sense of place subsets. Thus in encounter of people and place if assume people sense of place a general feeling to that place, place attachment is a positive emotion which people have about the place

Intra-Abdominal Pressure Monitoring By Nurses For Early Detection Of Abdominal Compartment Syndrome And Early Decompressed Laparotomy In Comparison With Need To Laparotomy By Physical Exam.

Abstract:Background& Objective:Abdominal compartment syndrome is as potentially lethal condition caused by any event that produces intra-abdominal hypertension. The most common cause is blunt abdominal trauma. Increasing intra-abdominal pressure affects much vital body system. Hemodynamic, respiratory, renal and neurological abnormalities are hallmark of ACS. All authors are agreeing that decompression laparotomy is the treatment of choice for the ACS. Nursing care involves vigilant monitoring for early detection including serial measurement of intra-abdominal pressure (from urinary bladder). This study was designed to investigate the comparative effect of measurement of intra-abdominal pressure and physical exam in patient with ACS for refer the patients to operation room. Methodology:In this research ACS was defined as abdominal distention with intra-abdominal pressure ≥15 mm Hg (20cm H2O) accompanied by at least two of the following: oliguria or anuria, hypoxemia and hypotension or shock. When ACS detected by researcher, compared with diagnose of need to laparotomy by physician both timely and numerically.Results:Of 100 patients admitted over 8 months, 28 patients had abdominal compartment syndrome, 21 of this patients refer to operation room by physician. According to numeral comparison between two group not significant (P>.05) but according the time measuring abdominal pressure for detection of need to decompressed laparotomy significantly decreased than physical exam (p<.05).Conclusion:The ACS is a potentially lethal condition occurs in a significant number of severely blunt abdominal trauma patients and it develops quickly. Preventative therapy should be instituted to minimize its development in patients at risk and monitoring of intraabdominal pressure may allow prompt treatment of this condition rather than physical exam