This special issue comprises of thirteen selected papers from the International Symposium on Information Processing 2009(ISIP 2009), Huangshan, China, 21-23 August 2009 and International Symposium on Intelligent Information Systems and Applications 2009 (IISA 2009), Qingdao, China, 28-30 October 2009. The conference received 623 papers submissions from 11 countries and regions, of which 320 papers were selected for presentation after a rigorous review process. From these 320 research papers, through two rounds of reviewing, the guest editors selected thirteen as the best papers on the Computers track of the Conference. The candidates of the Special Issue are all the authors, whose papers have been accepted and presented at the ISIP 2009 and IISA 2009, with the contents not been published elsewhere before.
The ISIP 2009 are Co-sponsored by Jiaxing University, China, Peoples' Friendship University of Russia, Russia, Nanchang HangKong University, China, Sichuan University, China, Hunan Agricultural University, China, National Chung Hsing University, Taiwan, Guangdong University of Business Studies, China, Academy Publisher of Finland, Finland.
   The IISA 2009 are Co-sponsored by Qingdao University of Science & Technology, China; Peoples’ Friendship University of Russia, Russia; Nanchang HangKong University, China; National Chung Hsing University, Taiwan; Hunan Agricultural University , China; Guangdong University of Business Studies, China; Jiaxing University, China. Technical Co-Sponsors of the conference are IEEE, IEEE Shandong Section, IEEE Shanghai Section.
   “A Data Aggregation Algorithm Based on Splay Tree for Wireless Sensor Networks”, by Zhang Shu-Kui, Cui Zhi-Ming,Gong Sheng-Rong, Liu Quan and Fan Jian-Xi. In this paper, an aggregation algorithm based on splay tree is proposed to achieve the following goals: monitoring data of any portion of the region can be obtained at one time by querying the root instead of flooding those regions, thus incurring significant energy savings.
   “Efficient Selection and Integration of Hidden Web Database”, by Xuefeng Xian, Pengpeng Zhao, Yuanfeng Yang, Jie Xin and Zhiming Cui, proposes an approach to iteratively select and integrate candidate web database. The core of this approach is a benefit function that evaluates how much benefit the web database brings to a given status of an integration system by integrating it.
   “A Study on the Influence of Organizational Climate on Knowledge-Sharing Behavior in IT Enterprises”, by Zhihong Li, Tao Zhu and Fang Luo proposes a research model about influencing factors of organizational climate on knowledge-sharing behavior within organizations.
   “Modeling and performance evaluation of service choreography based on stochastic Petri net”, by Yuxiang Dong, Yunni Xia, Tianhao Sun and Qingsheng Zhu, proposes a stochastic-Petri-net-based approach to predict the performance of web service choreographed using WSCI. This approach translates WSCI-based composition into general stochastic Petri net and obtains analytical estimation of process-completion-time based on the continuous-time Markov chain derived from the Petri net.
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