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Trust provisioning for composite services has become a hot research spot worldwide. In this paper, quality of service (QoS) planning techniques are introduced into service composition-oriented QoS provisioning architecture. By QoS planning, the overall QoS requirement of the composite service is decomposed into separate QoS requirement for every constituent atom service, the QoS level of which can subsequently be satisfied through well-designed service entity selection policies. For any single service entity, its QoS level is variable when the deployment environment or the load of service node changes. To mitigate the uncertainty, we put forward QoS preprocessing algorithms to estimate the future QoS levels of service entities with their history execution data. Then, based on the modeling of composite service and QoS planning, we design three algorithms, which include the time preference algorithm, cost\/availability (C\/A) preference algorithm, and Euclidean distance preference algorithm, to select suitable atomic services meeting the user\u2019s requirements. Finally, by combining genetic algorithm and local-search algorithm, we propose memetic algorithm to meet the QoS requirements of composite service. The effectiveness of the proposed methods by which the QoS requirements can be satisfied up to 90% is verified through experiments.<\/jats:p>","DOI":"10.1155\/2021\/9934138","type":"journal-article","created":{"date-parts":[[2021,5,17]],"date-time":"2021-05-17T23:20:10Z","timestamp":1621293610000},"page":"1-15","source":"Crossref","is-referenced-by-count":2,"title":["Trusted QoS Assurance Approach for Composite Service"],"prefix":"10.1155","volume":"2021","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9387-8717","authenticated-orcid":true,"given":"Meng","family":"Cai","sequence":"first","affiliation":[{"name":"School of Humanities and Social Sciences, Xi\u2019an Jiaotong University, Xi\u2019an 710049, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5524-7444","authenticated-orcid":true,"given":"Ying","family":"Cui","sequence":"additional","affiliation":[{"name":"School of Mechano-Electronic Engineering, Xidian University, Xi\u2019an 710071, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8197-746X","authenticated-orcid":true,"given":"Yang","family":"Yu","sequence":"additional","affiliation":[{"name":"School of Humanities and Social Sciences, Xi\u2019an Jiaotong University, Xi\u2019an 710049, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3327-0202","authenticated-orcid":true,"given":"Ying","family":"Xue","sequence":"additional","affiliation":[{"name":"School of Humanities and Social Sciences, Xi\u2019an Jiaotong University, Xi\u2019an 710049, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8957-7505","authenticated-orcid":true,"given":"Han","family":"Luo","sequence":"additional","affiliation":[{"name":"School of Humanities and Social Sciences, Xi\u2019an Jiaotong University, Xi\u2019an 710049, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","reference":[{"key":"1","first-page":"1","article-title":"TPM: a pattern for an architecture for trusted computing","author":"A. 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