scholarly journals A Mixed Recommended Algorithm Combining User Properties and Item Features

Author(s):  
Ning Xia ◽  
Shaofei Wu ◽  
Shenkuo Wang ◽  
Huajie Zhang
2021 ◽  
Vol 12 (3) ◽  
pp. 54-80
Author(s):  
Bikram Saha ◽  
Provas Kumar Roy ◽  
Barun Mandal

This article represents salp swarm algorithm (SSA) for the most favourable operating solution of economic load dispatch (ELD). For making the convergence first along with SSA, another optimization algorithm (i.e., BBO [biogeography;based optimization]) is also used. For lowering the operational cost, wind power is employed with thermal units. SSA is inspired by swarming behaviour of salp, which belongs to salpiside family. Salp possess a special kind of swarm while hunting for food and navigating. The recommended algorithm is executed on two systems of SIX units and 40 units. In both of the cases, load dispatch problem is carried out with renewable sources and also without renewable sources. Individually, BBO, SSA, and hybrid BBO-SSA are applied to all the test systems to justify effectiveness of hybrid BBO-SSA. Obtained results assure the prospective and advantages of recommended algorithm in contrast to algorithms mentioned in the article. Results come out to be very satisfying and reveal that hybrid BBO-SSA is a powerful algorithm to solve ELD problems.


2020 ◽  
Vol 46 (10) ◽  
pp. 1852-1862 ◽  
Author(s):  
Marion Moseby-Knappe ◽  
Erik Westhall ◽  
Sofia Backman ◽  
Niklas Mattsson-Carlgren ◽  
Irina Dragancea ◽  
...  

2018 ◽  
Vol 173 ◽  
pp. 03067
Author(s):  
Qing Yang ◽  
Peiling Yuan ◽  
Xi Zhu

This paper presents a personalized course recommended algorithm based on the hybrid recommendation. The recommendation algorithm uses the improved NewApriori algorithm to implements the association rule recommendation, and the user-based collaborative filtering algorithm is the main part of the algorithm. The hybrid algorithm adds the weight to the recommendation result of the user-based collaborative filtering and association rule recommendation, implementing a hybrid recommendation algorithm based on both of them. It has solved the problem of data sparsity and cold-start partially and provides a academic reference for the design of high performance elective system. The experiment uses the student scores data of a college as the test set and analyzes results and recommended quality of personalized elective course. According to the results of the experimental results, the quality of the improved hybrid recommendation algorithm is better.


2018 ◽  
Vol 56 (8) ◽  
Author(s):  
Adoracion Pegalajar-Jurado ◽  
Martin E. Schriefer ◽  
Ryan J. Welch ◽  
Marc R. Couturier ◽  
Tiffany MacKenzie ◽  
...  

ABSTRACTStandard two-tiered testing (STTT) is the recommended algorithm for laboratory diagnosis of Lyme disease (LD). Several limitations are associated with STTT that include low sensitivity in the early stages of disease, as well as technical complexity and subjectivity associated with second-tier immunoblotting; therefore, modified two-tiered testing (MTTT) algorithms that utilize two sequential first-tier tests and eliminate immunoblotting have been evaluated. Recently, a novel MTTT that uses a VlsE chemiluminescence immunoassay followed by a C6 enzyme immunoassay has been proposed. The purpose of this study was to evaluate the performance of the VlsE/C6 MTTT using well-characterized serum samples. Serum samples from the CDC Lyme Serum Repository were tested using three MTTTs, VlsE/C6, whole-cell sonicate (WCS)/C6, and WCS/VlsE, and three STTTs (immunoblotting preceded by three different first-tier assays: VlsE, C6, and WCS). Significant differences were not observed between the results of the MTTTs assessed; however, the VlsE/C6 MTTT resulted in the highest specificity (100%) when other diseases were tested and the lowest sensitivity (75%) for LD samples. Significant differences were present between the results for various MTTTs and STTTs evaluated. Specifically, all MTTTs resulted in higher sensitivities than the STTTs for all LD groups combined and were significantly more accurate (i.e., higher proportion of correct classifications) for this group, with the exception of the WCS/ViraStripe STTT. Additionally, when other diseases were tested, only the results of the VlsE/C6 MTTT differed significantly from those of the WCS/ViraStripe STTT, with the VlsE/C6 MTTT resulting in a 6.2% higher accuracy. Overall, the VlsE/C6 MTTT offers an additional laboratory testing algorithm for LD with equivalent or enhanced performance compared to that of the other MTTTs and STTTs evaluated in this study.


2017 ◽  
Vol 125 (05) ◽  
pp. 327-334 ◽  
Author(s):  
A. Reinisch ◽  
P. Malkomes ◽  
N. Habbe ◽  
J. Bojunga ◽  
F. Grünwald ◽  
...  

Abstract Diagnostic guidelines for thyroid nodules focus on malignancy risk assessment to avoid unnecessary diagnostic operations. These guidelines recommend a combination of tests in form of a diagnostic algorithm. The present study analyzed the recommended algorithm and its implementation by different medical professionals. Preoperative diagnostic procedures, laboratory tests and histopathological findings of patients who underwent thyroid surgery between 2006 and 2013 were analyzed. The results were stratified by the assignation by specialized endocrinologists (ENP), general practitioners (GP) or Goethe-University Hospital Frankfurt (UKF). 677 patients were enrolled, of these 62% were assigned by UKF, 18.5% by an ENP and 19.5% by a GP. Ultrasonography rate was significantly higher in UKF (97.6%) compared to patients assigned by GP (90.9%, p<0.0001). Rates for fine-needle aspiration cytology ranged between 47.6% in UKF and 23.2% in ENP (p<0.0001). In over 93% of the patients an analysis of thyroid-stimulating hormone and triiodothyronine/thyroxin was realized. The overall malignancy rate was 11.82%. The malignancy rate was significantly higher if a FNA biopsy was performed (16.35 vs. 8.94%; p=0.0048). A higher malignancy rate could only be seen if the preoperative diagnostic workup included FNA. Besides this, the grade of algorithm adherence showed no effect on the malignancy rate.


2007 ◽  
Vol 127 (1) ◽  
pp. 97-102 ◽  
Author(s):  
Kenneth L. Muldrew ◽  
Safedin H. Beqaj ◽  
Jian Han ◽  
Shanjuan H. Lum ◽  
Vicki Clinard ◽  
...  

2020 ◽  
Vol 9 (512) ◽  
pp. 291-297
Author(s):  
I. M. Teslenok ◽  
◽  
I. A. Triboy ◽  

The article is aimed at defining the main problems that arise at the stage of managing strategic changes of enterprises in the sphere of health improvement and recreation, elaborating the ways to overcome them. The available publications by many foreign and domestic scholars on the concept of «management of changes» are analyzed; the most accepted definitions of the concepts of «strategic changes» and «management of changes» are highlighted. The main problems that arise in management of changes in the enterprises operating in the sphere of health improvement and recreation are considered. A general scheme of the main stages of implementation of strategic changes is proposed, which consists of six main stages. These stages are the recommended algorithm of the process of implementation of changes at the enterprise operating in the sphere of health improvement and recreation. A SWOT-analysis of the sphere of health improvement and recreation of the country was conducted, strengths and weaknesses, opportunities and threats to the development of the tourism sector in Ukraine were identified. The most common directions of development of the sphere of health improvement and recreation are determined. The existing changes are researched according to the degree of transformations. The concepts of «program of changes» and «changes plan» are considered and the peculiarities of their composition are defined. Further on, the main essential tasks of developing a project of strategic changes have been formulated. The leading tasks of the program of changes at the enterprise have been defined. A general scheme for developing a strategic change implementation plan is proposed, consisting of three blocks: tasks; steps; terms of fulfillment. The problems in evaluating the results from the implemented changes have been identified and the general principles that should be consistent with assessing the effectiveness of these changes have been determined. The main reasons for resistance to strategic changes are allocated and ways to overcome them are proposed.


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