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Search Results: 1 - 10 of 1568 matches for " Yanyou Chai "
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The Forecast of Chinese Three Industrial Structures Under Grey Combination Data Model
Niannian Jia,Yanyou Chai
Journal of Modern Mathematics and Statistics , 2012,
Abstract: At present, China is at a crucial changing period from the second step strategic target to the third step strategic target. To forecast the future trend of the three industrial structures scientifically and to draw up the development target of industry rationally have great significance in optimizing the allocations of resources and achieving sustained economic growth. In this study, we combine the spherical projection with the grey model and present a new method to forecast Chinese 3 industrial structures. Compared with the actual data, we attest to that the model presented by this study can forecast Chinese 3 industrial structures quite accurately, reflect the Chinese three industrial structures mechanism and have rational and effective functions for analyzing trend and forecasting.
A Theoretic Proof of the Four Color Theorem
Yanyou Qiao
Mathematics , 2007,
Abstract: Withdrwan by author

Qiao Yanyou,

地理学报 , 1996,
Abstract: 时间GIS是当前地理信息系统发的重要领域之一,它的应用不仅方便了历史数据的存储,而且使得基于时间的空间数据分析成为可能,改善了传统GIS的动态管理,分析和决策支持功能。本文对在地籍信息系统的建立过程中应用这一技术的有关问题进行了研究。用时间标识的方法建立了各种地籍要素的时空数据结构,以数据更新和查询为例研究了时空数据的操作和应用。
Effect of acetazolamide on stable carbon isotope fractionation in Chlamydomonas reinhardtii and Chlorella vulgaris
YanYou Wu,Ying Xu,HaiTao Li,DeKe Xing
Chinese Science Bulletin , 2012, DOI: 10.1007/s11434-011-4861-9
Abstract: The effect of extracellular carbonic anhydrase (CAex) on stable carbon isotope fractionation in algae is still unclear. The stable carbon isotope composition and algal growth in the presence and absence of the membrane-impermeable CA inhibitor acetazolamide were compared in Chlamydomonas reinhardtii and Chlorella vulgaris. The CAex of both algal species contributed about 9‰ of the stable carbon isotope fractionation and exhibited a dosage effect. Therefore, evidence in vivo that CAex leads to a larger carbon isotope fractionation of algae is presented.
Studies on Dynamic Segmentation in GIS

Qiao Yanyou,

遥感学报 , 1995,
Abstract: Dynamic Segmentation is a new technique in the analysis,displayingand mapping of lines in GIS.In view of GIS application in the transportation in-formation management,this paper discusses the origin of dynamic segmentation andthe characteristics of attribute data base for it and gives the algorithm for its im-plementation. Taking the mutual querying between spatial data and attribute dataas an example,it demonstrats the application of dynamic segmentation,and dicus-ses the related algorithm and the command format.
Simulation of Power Flow and Protection of a Limited Bus Grid System with Injected Solar Power  [PDF]
Nader Barsoum, Chai Zen Lee
Energy and Power Engineering (EPE) , 2013, DOI: 10.4236/epe.2013.51008

In recent years, injection of renewable energy such as solar power into the power grid is increasing. However, inclusion of large-scale intermittent-type renewable energy requires better management in proper understanding of grid’s variable characteristics and its protection systems. In this paper, the investigation on overvoltage issue is illustrated. Overvoltage in distribution feeder occurs when large amount of solar power is injected at low power demand. Another investigation is on false operation of overcurrent relays due to reverse power to the 33 kV loads. The potential solutions to the two issues are illustrated in the small-sized power grid system using bi-directional inverters on AC buses in charging battery banks and adjusting the relay current settings. The benefits of solar power injection are illustrated whereby output power from generators is decreased and transmission losses are reduced. Electrical Transient Analysis Program (ETAP) was used for investigations.

Positive Solution of Fourth-Order Integral Boundary Value Problemwith Two Parameters
Guoqing Chai
Abstract and Applied Analysis , 2011, DOI: 10.1155/2011/859497
Abstract: The author investigates the fourth-order integral boundary value problem with two parameters (4)()
Existence results for anti-periodic boundary value problems of fractional differential equations
Guoqing Chai
Advances in Difference Equations , 2013, DOI: 10.1186/1687-1847-2013-53
Abstract: In this paper, the author is concerned with the following fractional equation \[ { }^CD_{0+}^\alpha u(t)=f(t,u(t),{}^CD_{0+}^{\alpha _1 } u(t),{ }^CD_{0+}^{\alpha _2 } u(t)),t\in (0,1) \] with the anti-periodic boundary value conditions \[ u(0)=-u(1), \;\; t^{\beta _1 -1}\; {}^CD_{0+}^{\beta _1 } u(t)_{\vert t\to 0}=-t^{\beta _1 -1}\; {}^CD_{0+}^{\beta_1 } u(t)_{\vert t=1}, \] \[ t^{\beta _2 -2}\; {}^CD_{0+}^{\beta _2 } u(t)_{\vert t\to 0} =-t^{\beta _2-2}\; {}^CD_{0+}^{\beta _2 }u(t)_{\vert t=1}, \] where ${ }^CD_{0+}^\gamma $ denotes the Caputo fractional derivative of order $\gamma $, the constants $\alpha ,\alpha _1 ,\alpha _2 ,\beta _1 ,\beta _2 $ satisfy the conditions that $2<\alpha \leq3,0<\alpha _1 \leq1<\alpha _2 \leq2,0<\beta _1 <1<\beta _2 <2$. Differing from the recent researches, the function $f$ involves Caputo fractional derivative ${}^CD_{0+}^{\alpha _1 } u(t)$ and ${}^CD_{0+}^{\alpha _2 } u(t)$. In addition, the author put forward a new anti-periodic boundary value conditions, which are more suitable than that were studied in the recent literature. By applying Banach contraction mapping principle, and Leray-Schauder degree theory, some existence results of solution are obtained.
Proboscis lateralis: Comments
Chai K
Indian Journal of Plastic Surgery , 2003,
Efficient Intelligent Localization Scheme for Distributed Wireless Sensor Networks
Chunlai Chai
Journal of Computers , 2009, DOI: 10.4304/jcp.4.11.1159-1166
Abstract: To estimate location accurately in distributed wireless sensor networks (WSNs), an efficient intelligent position estimation scheme is proposed which needs fewer known nodes without calculating relative positions. The proposed intelligent localization scheme includes two phases. In the first phase, an initialization location algorithm is adopted, where known nodes broadcast their positions and one-hop distances, and then unknown nodes use the received information and operate weighted estimation algorithm to calculate their initial positions. In the second phase, an optimized location algorithm is employed. Unknown nodes exchange information with their neighbors and operate a modified weighted estimation algorithm to refine their positions repeatedly. Additionally, a location scheme also is proposed to solve the problem that a node only has two neighbors. Detailed simulation results show that, the proposed scheme can decrease the average position error down to 9% radio range, and increase the average number of located nodes up to 78% when connectivity is greater than 12 in 20% known node ratio.
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