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Search Results: 1 - 10 of 38633 matches for " Yi Yao "
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The J-flow On Toric Manifolds
Yi Yao
Mathematics , 2014,
Abstract: We study the J-flow on the toric manifolds, through study the transition map between the moment maps induced by two K\"{a}hler metrics, which is a diffeomorphism between polytopes. This is similar to the work of Fang-Lai, under the assumption of Calabi symmetry, they study the monotone map between two intervals. We get a partial bound of the derivatives of transition map.
Estimation of a Type of Form-Invariant Combined Signals under Autoregressive Operators  [PDF]
Yinsheng Zhang, Jing Yao, Dongyun Yi
Open Journal of Statistics (OJS) , 2013, DOI: 10.4236/ojs.2013.36045

We focus on a type of combined signals whose forms remain invariant under the autoregressive operators. To extract the true signal from the autoregressive noise, we develop a strategy to separate parameters and use a two-step least squares approach to estimate the autoregressive parameters directly and then further give the estimate of the signal parameters. This method overcomes the difficulty that the autoregressive noise remains unknown in other methods. It can effectively separate the noise and extract the true signal. The algorithm is linear. The solution of the problem is computationally cheap and practical with high accuracy.

Analysis of Yellow Water in Liquor Fermentation with Sensor Array  [PDF]
Bo Chen, Yi Yao, Haijiao Luo
Journal of Sensor Technology (JST) , 2019, DOI: 10.4236/jst.2019.91001
Abstract: Yellow water is a by-product of liquor in the solid state fermentation process, and contains a large amount of nutrients, such as acids, esters, alcohols and aldehydes produced by fermentation. The components in the yellow water reflect the fermentation information to a certain extent, so the fermentation process can be monitored by detecting the yellow water component online. A sensor array detection device is designed for detecting yellow water. In addition, chemical titration is used to obtain data such as acidity, reducing sugar and starch of yellow water. Principal component analysis and discriminant function analysis were performed on the data; and a multivariate linear regression was used to establish a prediction model for the data. The results showed that the prediction bias for acidity and alcohol was small, 0.39 and 0.43, respectively.
Unexpected Nephrotoxicity in Male Ablactated Rats Induced by Cordyceps militaris: The Involvement of Oxidative Changes
Xiaowen Zhou,Yi Yao
Evidence-Based Complementary and Alternative Medicine , 2013, DOI: 10.1155/2013/786528
Rankin-Cohen Deformations and Representation Theory
Yi-Jun Yao
Mathematics , 2007,
Abstract: In this paper, we use the unitary representation theory of $SL_2(\mathbb R)$ to understand the Rankin-Cohen brackets for modular forms. Then we use this interpretation to study the corresponding deformation problems that Paula Cohen, Yuri Manin and Don Zagier initiated. Two uniqueness results are established.
Some results on the Gittins index for a normal reward process
Yi-Ching Yao
Mathematics , 2007, DOI: 10.1214/074921706000001111
Abstract: We consider the Gittins index for a normal distribution with unknown mean $\theta$ and known variance where $\theta$ has a normal prior. In addition to presenting some monotonicity properties of the Gittins index, we derive an approximation to the Gittins index by embedding the (discrete-time) normal setting into the continuous-time Wiener process setting in which the Gittins index is determined by the stopping boundary for an optimal stopping problem. By an application of Chernoff's continuity correction in optimal stopping, the approximation includes a correction term which accounts for the difference between the discrete and continuous-time stopping boundaries. Numerical results are also given to assess the performance of this simple approximation.
Adaptive Isochronal Synchronization in Mutually Coupled Chaotic Systems  [PDF]
Da Lin, Hong Song, Yi Yao, Fuchen Zhang
Journal of Modern Physics (JMP) , 2015, DOI: 10.4236/jmp.2015.62020
Abstract: This paper studies the problem of isochronal synchronization of chaotic systems with time-delayed mutual coupling. Based on the invariance principle of differential equations, an adaptive feedback scheme is proposed for the stability of isochronal synchronization between two identical chaotic systems. Unlike the usual linear feedback, the variable feedback strength is automatically adapted to isochronally synchronize two identical chaotic systems with delay-coupled, so this scheme is analytical, and simple to implement in practice. Simulation results show that the isochronal synchronization behavior is determined by time delay.
Characterizing PM2.5 Pollution of a Subtropical Metropolitan Area in China  [PDF]
Guojin Sun, Lin Yao, Li Jiao, Yao Shi, Qingyu Zhang, Mengna Tao, Guorong Shan, Yi He
Atmospheric and Climate Sciences (ACS) , 2013, DOI: 10.4236/acs.2013.31012

The chemical and physical characteristics of PM2.5, especially their temporal and geographical variations, have been explored in metropolitan Hangzhou area (China) by a field campaign from September 2010 to July 2011. Annual average concentrations of PM2.5 and PM10 during non-raining days were 106 - 131 μg.m-3 and 127 - 158 μg.m-3, respectively, at three stations in urban breathing zones, while corresponding concentrations of PM2.5 and PM10 at an urban background station (16 mabove ground level in a park) were 78 and 104 μg.m-3, respectively. For comparison, the annual average PM10 concentration at a suburban station (5 mAGL) was 93 μg.m-3. Detailed chemical analyses were also conducted for all samples collected during the campaign. We found that toxic metals (Cd, As, Pb, Zn, Mo, Cu, Hg) were highly enriched in the breathing zones due to anthropogenic activities, while soluble ions (\"\", \"\",\"\" ) and total carbon accounted for majority of PM2.5 mass. Unlike most areas in China where sulfate was several times of nitrate in fine PM, nitrate was as important as sulfate and highly correlated with ammonium during the campaign. Thus, a historical shift from sulfate-dominant fine PM to nitrate-dominant fine PM was documented.

The rise of granular computing
YAO Yi-yu,

重庆邮电大学学报(自然科学版) , 2008,
Abstract: This paper has two purposes. One is to present a critical examination of the rise of granular computing and the other is to suggest a triarchic theory of granular computing. By examining the reasons, justifications, and motivations for the rise of granular computing, we may be able to fully appreciate its scope, goal and potential values. The results enable us to formulate a triarchic theory in the light of research results from many disciplines. The three components of the theory are labeled as the philosophy, the methodology, and the computation. The integration of the three offers a unified view of gran-ular computing as a way of structured thinking, a method of structured problem solving, and a paradigm of structured infor-mation processing, focusing on hierarchical granular structures. The triarchic theory is an important effort in synthesizing the various theories and models of granular computing.

Yao Yi,

实验力学 , 1986,
Abstract: The theory of image division and subtraction is deduced in this paper.This theory can be realized easily by using image processing tecnhiques.With the help of these methods,isoclinics with precise location and without interference of isochromaties can be obtained.
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