期刊:
Lecture Notes in Computer Science,2018年10976:726-737 ISSN:0302-9743
通讯作者:
Feng, Qilong
作者机构:
[Feng, Qilong; Lin, Mugang] Cent S Univ, Sch Informat Sci & Engn, Changsha, Hunan, Peoples R China.;[Lin, Mugang] Hengyang Normal Univ, Sch Comp Sci & Technol, Hengyang, Peoples R China.;[Lin, Mugang] Hunan Prov Key Lab Intelligent Informat Proc & Ap, Hengyang, Peoples R China.;[Fu, Bin] Univ Texas Rio Grande Valley, Dept Comp Sci, Edinburg, TX 78539 USA.
通讯机构:
[Feng, Qilong] C;Cent S Univ, Sch Informat Sci & Engn, Changsha, Hunan, Peoples R China.
会议名称:
24th International Computing and Combinatorics Conference (COCOON)
会议时间:
JUL 02-04, 2018
会议地点:
Qing Dao, PEOPLES R CHINA
会议主办单位:
[Lin, Mugang;Feng, Qilong] Cent S Univ, Sch Informat Sci & Engn, Changsha, Hunan, Peoples R China.^[Lin, Mugang] Hengyang Normal Univ, Sch Comp Sci & Technol, Hengyang, Peoples R China.^[Lin, Mugang] Hunan Prov Key Lab Intelligent Informat Proc & Ap, Hengyang, Peoples R China.^[Fu, Bin] Univ Texas Rio Grande Valley, Dept Comp Sci, Edinburg, TX 78539 USA.
会议论文集名称:
Lecture Notes in Computer Science
关键词:
Approximation algorithm;l-Pseudoforest Deletion problem;Local ratio
摘要:
An l-pseudoforest is a graph each of whose connected component is at most l edges away from being a tree. The l-Pseudoforest Deletion problem is to delete a vertex set P of minimum weight from a given vertex-weighted graph \(G=(V,E)\) such that the remaining graph \(G[V\setminus P]\) is an l-pseudoforest. The Feedback Vertex Set problem is a special case of the l-Pseudoforest Deletion problem with \(l=0\). In this paper, we present a polynomial time 4l-approximation algorithm for the l-Pseudoforest Deletion problem with \(l\ge 1\) by using the local ratio technique. When \(l=1\), we get a better approximation ratio 2 for the problem by further analyzing the algorithm, which matches the current best constant approximation factor for the Feedback Vertex Set problem.
作者机构:
[Qian, Guiping; Zhang, Xiaohong; Zhang, Yun] Commun Univ Zhejiang, 998 Xueyuan St, Hangzhou, Zhejiang, Peoples R China.;[Zhao, Huihuang] Hengyang Normal Univ, 16 Henghua Rd, Hengyang, Peoples R China.
会议名称:
International Conference on Robotics, Control and Automation Engineering (RCAE) / International Conference on Advanced Mechanical and Electrical Engineering (AMEE)
会议时间:
DEC 26-28, 2018
会议地点:
Beijing, PEOPLES R CHINA
会议主办单位:
[Zhang, Xiaohong;Zhang, Yun;Qian, Guiping] Commun Univ Zhejiang, 998 Xueyuan St, Hangzhou, Zhejiang, Peoples R China.^[Zhao, Huihuang] Hengyang Normal Univ, 16 Henghua Rd, Hengyang, Peoples R China.
作者机构:
Key Laboratory of Functional Organometallic Materials of Hengyang Normal University,College of Hunan;Province,College of chemistry and Materials Science,Hengyang 421008 China 2.Key Laboratory for the C
摘要:
As we know,metal-organic frameworks(MOFs)are new generation of porous materials which are constructed via the coordination bonds between metal ions/clusters and organic functional ligands.For MOFs,designability and predictability of the porous structures and functions are the most important features,which have shown a wide range of properties,such as catalysis,energy storage,drug delivery,white light emitting materials and luminescent sensors.Recently,luminescent sensors based on MOFs have attracted great attention because they can selectively sense cations,anions,small molecules,pH values and so on.In this contribution,a new Cd(II)MOF,(1),was successfully prepared via the solvothermal reaction,which displays high water stability in the condition with different metal ions.Luminescence sensing study showed that MOF 1 possesses highly selective luminescent responses for Cu2+and Fe3+.
作者机构:
[Yi, Zheng-ji] Hengyang Normal Univ, Key Lab Funct Organometall Mat, Sch Chem & Mat Sci, Coll Hunan Prov, Hengyang 421008, Peoples R China.;[Tan, Kai-xuan] Univ South China, Sch Nucl Resources & Nucl Fuel Engn, Hengyang 421001, Peoples R China.
会议名称:
2nd International Workshop on Renewable Energy and Development (IWRED)
会议时间:
APR 20-22, 2018
会议地点:
Guilin, PEOPLES R CHINA
会议主办单位:
[Yi, Zheng-ji] Hengyang Normal Univ, Key Lab Funct Organometall Mat, Sch Chem & Mat Sci, Coll Hunan Prov, Hengyang 421008, Peoples R China.^[Tan, Kai-xuan] Univ South China, Sch Nucl Resources & Nucl Fuel Engn, Hengyang 421001, Peoples R China.
会议论文集名称:
IOP Conference Series-Earth and Environmental Science
摘要:
The Xiangxi gold mine was taken as an example to illustrate the application of the finite element and updated Lagrangian approach in the simulation and prediction of the quality of tailings effluents. The numerical modeling results suggest that tailings-water interaction at the early stage leads to the acidification and release of heavy metals which are responsible for the persistent pollution to the environment for 30 years. Tailings pore water can be gradually neutralized and contents of polluted species tend to decline markedly with time. The gangue dissolution and organic matter reaction can stimulate acid neutralization and decrease the diffusion rate of oxygen in tailings impoundments. The contents of pore-water species in upper tailings are significantly higher than in lower part and change severely at 6 m depth. Therefore, the hydrological zoning phenomenon in tailings impoundments accounts for geochemical zonation. This model has the potential to predict drainage quality of sulfide mine tailing impoundments.
作者机构:
[Wen, Jia-Hong; Jiang, Qin] Shanghai Normal Univ, Dept Geog, Shanghai 200234, Peoples R China.;[Huang, Yi-Min] Hengyang Normal Univ, Dept City & Tourism Management, Hengyang 421002, Hunan, Peoples R China.;[Li, Wei-Yue] Shanghai Normal Univ, Inst Urban Study, Shanghai 200234, Peoples R China.
会议名称:
3rd Annual International Conference on Sustainable Development [ICSD)
会议时间:
JUL 14-16, 2017
会议地点:
Tianjin, PEOPLES R CHINA
会议主办单位:
[Jiang, Qin;Wen, Jia-Hong] Shanghai Normal Univ, Dept Geog, Shanghai 200234, Peoples R China.^[Huang, Yi-Min] Hengyang Normal Univ, Dept City & Tourism Management, Hengyang 421002, Hunan, Peoples R China.^[Li, Wei-Yue] Shanghai Normal Univ, Inst Urban Study, Shanghai 200234, Peoples R China.
会议论文集名称:
AER-Advances in Engineering Research
关键词:
Precipitation;Multiple time scale;Wavelet analysis;The Hengyang Basin
摘要:
This paper based on the monthly precipitation data of 9 surface meteorological stations in the Hengyang basin for 53 years (1960 to 2012), by using the methods of Morlet wavelet transform and Mexican hat wavelet analysis, the multi-time scales of precipitation of the Hengyang basin has analyzed. The results show that during the study period, the Hengyang basin has different time scales during the year and seasonal precipitation. The main periodic variation characteristics of quasi 24a, quasi 10a and quasi 3a time scales are existed in annual precipitation. And on the quasi 24a scale, the mutation points are 1963a, 1970a, 1977a, 1990a and 2004a. The characteristic period of spring and summer, or autumn and winter precipitation have highly similarity. And we speculate that the precipitation in the Hengyang basin tends to be less than normal in some time after 2012a.
作者机构:
[Liu, Gang] Hengyang Normal Univ, Coll Math & Stat, Hunan Prov Key Lab Intelligent Informat Proc & Ap, Hengyang 421008, Hunan, Peoples R China.;[Ponnusamy, Saminathan] Indian Inst Technol Madras, Dept Math, Madras 600036, Tamil Nadu, India.;[Ponnusamy, Saminathan] IST, Chennai Ctr, 110 Nelson Manickam Rd, Madras 600029, Tamil Nadu, India.
通讯机构:
[Liu, Gang] H;Hengyang Normal Univ, Coll Math & Stat, Hunan Prov Key Lab Intelligent Informat Proc & Ap, Hengyang 421008, Hunan, Peoples R China.
会议名称:
7th International Conference on Complex Analysis and Dynamical Systems (CA&DS VII)
会议时间:
MAY 10-15, 2015
会议地点:
Nahariya, ISRAEL
会议主办单位:
[Liu, Gang] Hengyang Normal Univ, Coll Math & Stat, Hunan Prov Key Lab Intelligent Informat Proc & Ap, Hengyang 421008, Hunan, Peoples R China.^[Ponnusamy, Saminathan] Indian Inst Technol Madras, Dept Math, Madras 600036, Tamil Nadu, India.^[Ponnusamy, Saminathan] IST, Chennai Ctr, 110 Nelson Manickam Rd, Madras 600029, Tamil Nadu, India.
会议论文集名称:
Contemporary Mathematics
关键词:
Analytic;anti-analytic;harmonic;biharmonic;p-harmonic;polyharmonic and composition
摘要:
The paper is devoted to the study of compositions of polyharmonic mappings in simply connected domains. More precisely, we determine necessary and sufficient conditions of polyharmonic mapping $f$ such that $f\circ F$ (resp. $F\circ f$) is $l$-harmonic for any analytic function (or harmonic mapping but not analytic, or $q$-harmonic mapping but not $(q-1)$-harmonic) $F$.