通讯机构：
[Liu, Yongbin] U;Univ South China, Sch Comp Sci & Technol, Hengyang 421001, Peoples R China.
关键词：
word embedding;co-reference resolution;representation learning
摘要：
Word embedding has drawn a lot of attention due to its usefulness in many NLP tasks. So far a handful of neural-network based word embedding algorithms have been proposed without considering the effects of pronouns in the training corpus. In this paper, we propose using co-reference resolution to improve the word embedding by extracting better context. We evaluate four word embeddings with considerations of co-reference resolution and compare the quality of word embedding on the task of word analogy and word similarity on multiple data sets. Experiments show that by using co-reference resolution, the word embedding performance in the word analogy task can be improved by around 1.88%. We find that the words that are names of countries are affected the most, which is as expected.
摘要：
To overcome the deficiencies of weak local search ability in genetic algorithms (GA) and slow global convergence speed in ant colony optimization (ACO) algorithm in solving complex optimization problems, the chaotic optimization method, multi-population collaborative strategy and adaptive control parameters are introduced into the GA and ACO algorithm to propose a genetic and ant colony adaptive collaborative optimization (MGACACO) algorithm for solving complex optimization problems. The proposed MGACACO algorithm makes use of the exploration capability of GA and stochastic capability of ACO algorithm. In the proposed MGACACO algorithm, the multi-population strategy is used to realize the information exchange and cooperation among the various populations. The chaotic optimization method is used to overcome long search time, avoid falling into the local extremum and improve the search accuracy. The adaptive control parameters is used to make relatively uniform pheromone distribution, effectively solve the contradiction between expanding search and finding optimal solution. The collaborative strategy is used to dynamically balance the global ability and local search ability, and improve the convergence speed. Finally, various scale TSP are selected to verify the effectiveness of the proposed MGACACO algorithm. The experiment results show that the proposed MGACACO algorithm can avoid falling into the local extremum, and takes on better search precision and faster convergence speed.
作者机构：
[Wang, Lin-Wei; Li, Yan] Capital Med Univ, Beijing Shijitan Hosp, Dept Surg Oncol, Beijing 100038, Peoples R China.;[Wang, Lin-Wei; Wu, Han; Liu, Wen-Lou; Li, Yan; Chen, Jia-Mei] Wuhan Univ, Zhongnan Hosp, Dept Oncol, Wuhan 430071, Peoples R China.;[Qu, Ai-Ping] Univ South China, Sch Comp Sci & Technol, Hengyang 421001, Peoples R China.;[Yuan, Jing-Ping] Wuhan Univ, Renmin Hosp, Dept Pathol, Wuhan 430060, Peoples R China.;[Liu, Juan] Wuhan Univ, Sch Comp, Wuhan 430072, Peoples R China.
通讯机构：
[Li, Yan] C;[Li, Yan; Liu, Juan] W;Capital Med Univ, Beijing Shijitan Hosp, Dept Surg Oncol, Beijing 100038, Peoples R China.;Wuhan Univ, Zhongnan Hosp, Dept Oncol, Wuhan 430071, Peoples R China.;Wuhan Univ, Sch Comp, Wuhan 430072, Peoples R China.
摘要：
As a widely used proliferative marker, Ki67 has important impacts on cancer prognosis, especially for breast cancer (BC). However, variations in analytical practice make it difficult for pathologists to manually measure Ki67 index. This study is to establish quantum dots (QDs)-based double imaging of nuclear Ki67 as red signal by QDs-655, cytoplasmic cytokeratin (CK) as yellow signal by QDs-585, and organic dye imaging of cell nucleus as blue signal by 4',6-diamidino-2-phenylindole (DAPI), and to develop a computer-aided automatic method for Ki67 index measurement. The newly developed automatic computerized Ki67 measurement could efficiently recognize and count Ki67-positive cancer cell nuclei with red signals and cancer cell nuclei with blue signals within cancer cell cytoplasmic with yellow signals. Comparisons of computerized Ki67 index, visual Ki67 index, and marked Ki67 index for 30 patients of 90 images with Ki67 </= 10% (low grade), 10% < Ki67 < 50% (moderate grade), and Ki67 >/= 50% (high grade) showed computerized Ki67 counting is better than visual Ki67 counting, especially for Ki67 low and moderate grades. Based on QDs-based double imaging and organic dye imaging on BC tissues, this study successfully developed an automatic computerized Ki67 counting method to measure Ki67 index.
期刊：
International Journal of Simulation Modelling,2016年15(4):742-753 ISSN：1726-4529
通讯作者：
Wu, D. Q.
作者机构：
[Wu, D. Q.] Shanghai Ocean Univ, Coll Econ & Management, Shanghai 201306, Peoples R China.;[Li, H. Y.; Wu, D. Q.] Univ South China, Comp Sci & Technol Inst, Hengyang 421001, Peoples R China.;[Dong, M.; Wu, D. Q.] Shanghai Jiao Tong Univ, Antai Coll Econ & Management, Shanghai 200240, Peoples R China.;[Wu, D. Q.] Sichuan Univ Sci & Engn, Artificial Intelligence Key Lab Sichuan Prov, Zigong 643000, Peoples R China.;[Wu, D. Q.] Guangxi Univ Nationalities, Key Lab, Guangxi High Sch Complex Syst, Nanning 530004, Peoples R China.
通讯机构：
[Wu, D. Q.] S;[Wu, D. Q.] U;[Wu, D. Q.] G;[Wu, D. Q.] N;Shanghai Ocean Univ, Coll Econ & Management, Shanghai 201306, Peoples R China.
关键词：
Multi-Objective Optimization;Discrete Particle Swarm Optimization;Variable Neighbourhood Search;Vehicle Routing Problem with Time Windows
摘要：
This paper introduces a novel multi-objective algorithm (HMPSO) based on discrete particle swarm optimization (PSO) to solve vehicle routing problems with time windows (VRPTW). The presented HMPSO algorithm was combined with an advanced discrete PSO based on set and variable neighbourhood searches to find Pareto optimal routing solutions. These consisted of a complete routing schedule for serving the customers to minimize the two aims of travelling distance and number of vehicles. To increase the discrete PSO efficiency, a novel decoding scheme based on set was designed, and the variable neighbourhood local search was employed to explore new solutions. The experiment results were showed for a set of the Solomon's 56 VRPTW. The HMPSO algorithm was compared with some algorithms published in papers with the computational evaluations clearly supporting the high performance of the proposed HMPSO algorithm against other algorithms, and confirming that the HMPSO is an efficient algorithm because of a reasonable computational time and cost in solve VRPTW.
期刊：
International Journal of Distributed Sensor Networks,2015年2015(10):437678:1-437678:13 ISSN：1550-1477
通讯作者：
Liu, Fangju
作者机构：
[Liu, Fangju] Univ South China, Sch Comp Sci & Technol, Hengyang 421001, Hunan, Peoples R China.;[Ma, Xingpo] Xinyang Normal Univ, Sch Comp & Informat Technol, Xinyang 464000, Henan, Peoples R China.;[Liang, Junbin] Guangxi Univ, Sch Comp & Elect Informat, Nanning 530004, Guangxi, Peoples R China.;[Lin, Mugang] Hengyang Normal Univ, Dept Comp Sci, Hengyang 421008, Hunan, Peoples R China.
通讯机构：
[Liu, Fangju] U;Univ South China, Sch Comp Sci & Technol, Hengyang 421001, Hunan, Peoples R China.
摘要：
Verifiable top-k query processing in tiered sensor networks, which refers to verifying the authenticity and the completeness of top-k query results received by the network owner in tiered sensor networks, has received attention in very recent years. However, the existing solutions of this problem are only fit for static sensor network. In this paper, we try to solve the problem in a tiered mobile sensor network model, where not only static sensor nodes but also mobile sensor nodes existed. Based on the tiered mobile sensor network model, we propose a novel verifiable scheme named VTMSN for fine-grained top-k queries. The main idea of VTMSN is as follows: it maps each of the positions where sensor nodes are in a static state to a virtual node and then establishes relationships among data items of each virtual node with their score orders, which are encrypted along with the scores of the data items and the time epochs using the distinct symmetric keys kept by each sensor node and the network owner. Both theory analysis and simulation results show the efficiency and the security of VTMSN.
期刊：
Solid State Communications,2014年191:59-65 ISSN：0038-1098
通讯作者：
Chen, L. N.
作者机构：
[Chen, L. N.] Cent S Univ, Sch Informat Sci & Engn, Changsha 410083, Hunan, Peoples R China.;[Chen, L. N.] Univ South China, Sch Comp Sci & Technol, Hengyang 421001, Peoples R China.
通讯机构：
[Chen, L. N.] C;Cent S Univ, Sch Informat Sci & Engn, Changsha 410083, Hunan, Peoples R China.
关键词：
A. Armchair graphene nanoribbon;D. B/N doping;D. Energy gap;E. First-principles
摘要：
Using the first-principles calculations based on density functional theory, we investigated the electronic properties of armchair graphene nanoribbons (AGNRs) with boron nitrogen (BN) doping. The B and N impurities can adjust the electronic properties of the AGNRs, whose features strongly depend on the impurity types and the ribbon width of the AGNRs. Interestingly, with the increase of the ribbon width, the energy gap of the AGNRs with B/N pair doping is oscillatory. The AGNRs with B or N doping show metallic behavior, and the localized unsaturated electronic states on the edge atoms lead to magnetism. These unconventional doping effects could be used to design semiconductor electronic devices. (C) 2014 Elsevier Ltd. All rights reserved.
作者机构：
[Long, M. Q.; Cao, C.; Xu, H.; Wu, X. Z.; Xiao, J.] Cent S Univ, Sch Phys & Elect, Changsha 410083, Peoples R China.;[Xu, H.; Wu, X. Z.] Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China.;[Long, M. Q.; Cao, C.; Xu, H.; Wu, X. Z.; Xiao, J.; Chen, L. N.] Cent S Univ, Inst Super Microstruct & Ultrafast Proc, Changsha 410083, Peoples R China.;[Chen, L. N.] Univ S China, Sch Comp Sci & Technol, Hengyang 421001, Peoples R China.
通讯机构：
[Xu, H.] C;Cent S Univ, Sch Phys & Elect, Changsha 410083, Peoples R China.
关键词：
Transport properties;Molecular device;Rectifying behavior;Asymmetry electrode
摘要：
By applying nonequilibrium Green's functions in combination with the density functional theory, we have investigated the electronic transport properties of molecular devices consisting of the carbon atomic chain coupling with symmetry and asymmetry Au electrodes. The asymmetry Au electrodes systems display good rectifying behavior. The main origin of this phenomenon is that a molecular core coupling with asymmetry electrodes can generate two asymmetrical Schottky barriers at both extended molecule regions. This rectification is also explained by the calculated transmission spectrum and the spatial distribution of the LUMO and HOMO states. (c) 2012 Elsevier B.V. All rights reserved.
作者机构：
[Chen, Ling-Na; Long, Meng-Qiu; Cao, Can; Xu, Hui] Cent S Univ, Sch Phys & Elect, Inst Super Microstruct & Ultrafast Proc, Changsha 410083, Hunan, Peoples R China.;[Chen, Ling-Na] Univ South China, Sch Comp Sci & Technol, Hengyang 421001, Peoples R China.
通讯机构：
[Long, Meng-Qiu] C;Cent S Univ, Sch Phys & Elect, Inst Super Microstruct & Ultrafast Proc, Changsha 410083, Hunan, Peoples R China.
关键词：
Electronic transport property;Zigzag graphene nanoribbon heterojunction;Edge hydrogenation;Rectifying effect
摘要：
Using nonequilibrium Green's functions in combination with the density functional theory, we investigated the electronic transport behaviors of zigzag graphene nanoribbon (ZGNR) heterojunctions with different edge hydrogenations. The results show that electronic transport properties of ZGNR heterojunctions can be modulated by hydrogenations, and prominent rectification effects can be observed. We propose that the edge dihydrogenation leads to a blocking of electronic transfer, as well as the changes of the distribution of the frontier orbital at negative/positive bias might be responsible for the rectification effects. These results may be helpful for designing practical devices based on graphene nanoribbons. Crown Copyright (C) 2013 Published by Elsevier B.V. All rights reserved.
摘要：
This paper presents a hybrid differential evolution (DE) with quantum-behaved particle swarm optimization (QPSO) for the unmanned aerial vehicle (UAV) route planning on the sea. The proposed method, denoted as DEQPSO, combines the DE algorithm with the QPSO algorithm in an attempt to further enhance the performance of both algorithms. The route planning for UAV on the sea is formulated as an optimization problem. A simple method of pretreatment to the terrain environment is proposed. A novel route planner for UAV is designed to generate a safe and flyable path in the presence of different threat environments based on the DEQPSO algorithm. To show the high performance of the proposed method, the DEQPSO algorithm is compared with the real-valued genetic algorithm, DE, standard particle swarm optimization (PSO), hybrid particle swarm with differential evolution operator, and QPSO in terms of the solution quality, robustness, and the convergence property. Experimental results demonstrate that the proposed method is capable of generating higher quality paths efficiently for UAV than any other tested optimization algorithms.
作者：
Chen, L. N.;Cao, C.;Wu, X. Z.;Ma, S. S.;Huang, W. R.;...
期刊：
Solid State Communications,2012年152(23):2123-2127 ISSN：0038-1098
通讯作者：
Xu, H.
作者机构：
[Ma, S. S.; Cao, C.; Xu, H.; Wu, X. Z.; Huang, W. R.; Chen, L. N.] Cent S Univ, Sch Phys Sci & Technol, Changsha 410083, Hunan, Peoples R China.;[Chen, L. N.] Univ S China, Sch Comp Sci & Technol, Hengyang 421001, Peoples R China.;[Huang, W. R.] Changsha Univ Sci & Technol, Sch Phys & Elect Sci, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[Xu, H.] C;Cent S Univ, Sch Phys Sci & Technol, Changsha 410083, Hunan, Peoples R China.
关键词：
A. Molecular device;D. Hydrogenation;D. Transport property;E. First-principles
摘要：
By using nonequilibrium Green's functions in combination with the density-function theory, we investigate electronic transport properties of molecular devices with pristine and partial hydrogenation. The calculated results show that the electronic transport properties of molecular devices can be modulated by partial hydrogenation. Interestingly, our results exhibit negative differential resistance behavior in the case of the imbalance H-adsorption in C-60 molecular devices under low bias. However, negative differential resistance behavior cannot be observed in the case of the balance H-adsorption. A mechanism is proposed for the hydrogenation and negative differential resistance behavior. (c) 2012 Elsevier Ltd. All rights reserved.
