There are two vortices shed from the tandem flags in each flapping period. As described later, our composite inverted flags exhibit large-amplitude limit-cycle flapping at wind velocities in the range of 6-23 m s−1 and produce up to 0.45 mW of electrical power, which is enough to meet the demand of low-power sensor systems operating in the micro-Watt to milli-Watt power range. During testing under controlled flow conditions inside a wind tunnel, their composite inverted flags exhibited large-amplitude limit-cycle flapping at wind velocities in the range of about 9-25 m s−1. The flapping dynamics of vertically clamped three-dimensional flags in a Poiseuille flow was studied numerically by using the immersed boundary method. As such, the influence of the geometric parameters of the composite inverted flag on its dynamics and power generation remains unknown. In particular, we have realized 12 composite inverted flags of different geometries (three lengths and four widths), and have systematically investigated their dynamics and power generation under controlled excitation in a wind tunnel. These efforts have led to the development of many so called speed-up techniques, as for example Arc-Flags. In this article, we introduce a new data structure, named Road-Signs, which is used to update the Arc-Flags of a graph in fully dynamic scenarios.
We show that this algorithm is better than recomputation from scratch of Arc-Flags in terms of the affected parameters of the input, which makes this solution suitable to be efficient in practice. Our experiments show a significant speed-up in the updating phase with respect to the recomputation from scratch of Arc-Flags.Copyright © 2014 Wiley Periodicals, Inc. NETWORKS, Vol. However, it is not better than recomputation from scratch in the worst case. As to the predicted performance at the cutoff value of 0.5, non-financial samples with the overall classification accuracy closes to and over 91.6 per cent while Type I errors (misclassifying failed firms to nonfailed firms) amount to 44.4 per cent and Type II errors (misclassifying nonfailed firms to failed firms) are even better at 3.5 per cent. Samples are divided into 2 major sectors: non-financial and financial samples. Retained earnings to total assets (RE/TA), operating income to total assets (OI/TA), total liabilities to total assets (TL/TA) and two-year negative net income (LOSS 2) are among the sixteen variables, which are significant short-term predictors and retained earnings to total assets (RE/TA) and total liabilities to total assets (TL/TA) are also significant long-term indicators for non-financial firms.
While net income to shareholders’ equity (NI/SE), retained earnings to total assets (RE/TA), operating income to total assets (OI/TA), total liabilities to total assets (TL/TA), and current assets to total assets (CA/TA) are also significant long-term indicators for financial firms. This study is to identify red flags on financial failure of Thai corporations, since the collapse of many business firms, especially the financial institutions and real estate firms in 1997. Red flags are indicators for possible cause for concerned specific areas that represent potential problems; here it is limited to financial failure. Emerging is vital. The imperceptibility of these banners builds your odds of achieving numerous potential clients. Flags and banners are available in different type of material such as paper, cloth, plastic, and polyester and aluminum framework. On the other hand, financial samples with the overall classification rate are rather low (between 40-77.8 per cent) while Type I errors are decreased to 20 per cent and Type II errors are drastically increased to 36 per cent. In addition, the study includes prediction performance and experimental forecasting of 1998-2000. / The data used in this study are collected from the SET data-base. Experimental forecasting of financial performance in 1998 to 2000 is also conducted by using estimation models of 1996, 1995, and 1994 respectively.
An additional advantage of the composite inverted flag is that it is possible to have two layers of PVDF strips, one for each face of the flag, thereby increasing the power output in comparison with inverted flags entirely realized using PVDF strips which include only one layer of active elements. A potentially superior design would be a composite inverted flag which, as schematically shown in figure 2(b), in addition to the PVDF strips also includes an elastic structural support to increase the elasticity of the inverted flag. Figure 2. (a) Side view schematic of a PVDF inverted flag construction (the fixed pole of the flag is located on the left in the figure and military mailbox covers is vertically oriented); the example shown includes four PVDF strips. The novel contribution of this work is that it is the 1st study to provide a systematic assessment of the performance, under pure wind excitation, of composite inverted flags constructed using flexible PVDF strips as active elements and a stainless-steel shim as elastic structural support.