Detection of Target and Suppression of Sea and Weather Clutter in Stormy Weather by Weibull/ CFAR

2021 ◽  
Vol 16 (2) ◽  
pp. 180-187
Author(s):  
Shuji Sayama
Keyword(s):  
2020 ◽  
pp. 75-101
Author(s):  
A. N. Timofeev

A. Timofeev takes a close look at the works of A. Ivanov, from his early novel Dorm-on-the-Blood [Obshchaga-na-Krovi] (1992), both simplistic and bearing marks of apprenticeship, to Stormy Weather [Nenastie] (2015), the writer’s most popular book, along with The Geographer Drank His Globe Away [Geograf globus propil] (1995), all the better known thanks to their film versions. The critic finds that, rather than a gallery of accomplished works, Ivanov’s writing represents an agonizing search, his path characterized by alternating moments of success and failure and his ambitious preconceptions hindering his development and forcing his artistic intuition to overcome them. Speaking of Ivanov’s undeniable triumphs, A. Timofeev mentions The Heart of Parma [Serdtse Parmy] and the later novel Tobol, whereas Ivanov’s ‘transitional’ novel Bluda and MUDO [Bluda i MUDO], the ‘network’ duology Dog-Heads [Psoglavtsy] and Community [Kommiuniti], and even the cult novel Rebels’ Gold [Zoloto bunta] are presented as flops. Nonetheless, Timofeev rates Ivanov as one of the best writers of the 2000s–2010s.


2011 ◽  
Vol 250-253 ◽  
pp. 2229-2233 ◽  
Author(s):  
Yu Feng Zhang ◽  
Chao Li

A large under-construction chimney at BALCO Power Plant in central India collapsed on Sep. 23, 2009 under severe stormy weather, causing serious casualties and massive economic losses, while another, similarly built, survived. So far, there has been no strict and scientific analysis on the cause of the accident. In this paper, finite element method is used to simulate the effect of wind loads and the whole collapse procedure based on the investigation of information about the design, the construction, the site related records, etc. The results show that the initial part of the chimney destroyed is the top of the structure (specifically the construction platform and the partial top cylinder wall of the chimney); then the debris from the top fells and crashes the lower part of the structure, eventually leading to the whole structure collapsing. The analysis results are basically consistent with the observation of the debris and the toppling scene and what the witnesses described, and scientifically clarify the actual cause of the chimney collapse. In addition, by comparing the chimney design codes between the USA and China, along with the analysis results, some suggestions are proposed to prevent similar accidents in chimney projects.


2011 ◽  
pp. 223-225
Author(s):  
Andrew L. Stone
Keyword(s):  

Author(s):  
R. J. Ridge
Keyword(s):  
The West ◽  

The mackerel fishery began off Plymouth in January, and boats from Yarmouth, Lowestoft, Newhaven, Brighton, Eastbourne, Hastings, Plymouth, together with a considerable number of Mount's Bay boats (Porthleven, Newlyn, and Mousehole) were engaged in the above fishery. Fish were found about the 13th January fifteen to twenty-five miles south-west of the Start Point, of a very fine quality, and were caught in considerable quantities for some few nights, catches from two lasts (20,000) down to few hundreds per boat. Westerly and south-west winds prevailing (strong breezes), very stormy weather set in, and fishing operations were interrupted for three weeks, when the boats got to work again, meeting only with light catches for some weeks, February and March were not very successful months, easterly winds set in and continued throughout above months, and practically nothing was done till latter part of March and beginning of April, when boats fell in with fish south-west of Eddystone fifteen to twenty-five miles. There fish were not so fine in quality as those of January, and appeared to be quite distinct from the latter. Some good hauls were secured, one last (being about the largest catch) to few hundreds per boat. The fishing continued up to May, and boats did fairly well, a good average earnings was obtained, prices kept up, especially during Lent.


1909 ◽  
Vol 29 ◽  
pp. 619-647 ◽  
Author(s):  
E. M. Wedderburn ◽  
W. Watson

One of the authors having made an experimental investigation on the currents produced in a trough of water by a blast of air driven along the surface of the water, it was desired to test the correctness of his deductions by actual observations in a large lake. Loch Ness was chosen on account of its length and uniformity of basin, as it was thought that the length and narrowness of the loch would lead to clearly defined currents being set up in the lake. The sequel showed, as in the case of observations on seiches, that it would have been better to confine attention to a smaller lake, for a twofold reason, (1) because in a large lake the difficulties of observations are much greater than in a small lake during stormy weather, and in very deep lakes the difficulties in the way of obtaining a fixed point from which to use the current meter are formidable, and (2) because it would seem from a few observations made in Loch Garry (Ness Basin) that currents are more defined and more regular in small than in great lakes.


Author(s):  
Q. Li ◽  
X. Hao ◽  
W. Wang ◽  
A. Wu ◽  
Z. Xie

The adverse weather may significantly impact urban traffic speed and travel time. Understanding the influence of the rainstorm to urban traffic speed is of great importance for traffic management under stormy weather. This study aims to investigate the impact of rainfall intensity on traffic speed in the Shenzhen (China) during the period 1 July 2015–31 August 2016. The analysis was carried out for five 1-h periods on weekdays during the morning periods (6:00 AM–11:00 AM). Taxi-enabled GPS tracking data obtained from Shenzhen city are used in the analysis. There are several findings in this study. Firstly, nearly half of the roads are significantly affected by the rainstorm. Secondly, the proportion of positive correlated roads is about 35 %, but there still are some roads with uncorrelated traffic speed variation rates (SVR) and rainfall intensities. Thirdly, the impact of the rainstorm on traffic speed is not homogeneous but with obvious spatial difference. This research provides useful information that can be used in traffic management on a city-wide scale under stormy weather.


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