Search

Path-coverage oriented testing is a crucial method in software testing, and the rapid generation of high-quality test data to satisfy path coverage requirements has been a persistent research challenge. To address issues such as long running times, unstable exploration processes, and the generation of redundant test cases in existing intelligent optimization methods, this paper proposed a selection strategy based on the reinforcement learning paradigm applied to test data generation with path coverage as the criterion. By defining executable paths as the state of the intelligent agent, it defined the data selection after each iteration update as the agent's action. It associated the reward function with state changes, and employed a greedy strategy during the state update process to guide input data towards continuous variations in unexplored states. This iterative selection process aimed to continuously choose data that covered new executable paths, thereby achieving the goal of covering all execution paths of the target program. Experimental results demonstrate that compared to other algorithms, the proposed strategy significantly reduces running times and iteration counts while achieving notable improvements in coverage. Theoretical analysis supports the conclusion that the proposed strategy effectively realizes path coverage and enhances the efficiency of test data generation in practical applications. [ABSTRACT FROM AUTHOR]

Copyright of Coal Geology & Exploration is the property of Xian Research Institute of China Coal Research Institute and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Progress in Modern Biomedicine is the property of Publishing House of Progress in Modern Biomedicine and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Asian Journals of Ecotoxicology is the property of Gai Kan Bian Wei Hui and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Application Research of Computers / Jisuanji Yingyong Yanjiu is the property of Application Research of Computers Edition and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Objective To investigate the clinical features of Klebsiella pneumoniae liver abscess and the influencing factors for prognosis. Methods A retrospective analysis was performed for the patients with liver abscess who were hospitalized and had positive blood culture or pus culture in Beijing Ditan Hospital, Capital Medical University, from January 2010 to January 2020, and according to the results of etiology, these patients were divided into Klebsiella pneumoniae group (KP group) and non Klebsiella pneumoniae group (non - KP group). Clinical features were compared between the two groups. The two independent - samples t test or the Mann-Whitney U test was used for comparison of continuous data between two groups, and the chi-square test was used for comparison of categorical data between two groups. A multivariate logistic regression analysis was used to identify independent influencing factors for poor prognosis, and a nomogram predictive model was established based on these factors. Index of concordance (C-index) was used for internal validation, and a decision curve analysis was also performed. Results A total of 89 patients with liver abscess were enrolled, with 48 patients in the KP group and 41 in the non - KP group. Compared with the non - KP group, the KP group had a significantly higher proportion of patients with type 2 diabetes mellitus (χ² = 12.508, P <0.001), hypertension (χ² = 4.215, P=0.04), or fatty liver disease (χ² = 6. 832, P = 0.009) and a significantly lower proportion of patients with a medical history of malignant tumor (χ² = 15.039, P < 0.001), human immunodeficiency virus infection (χ² = 15.039, P <0.001), or a medical history of gallstones (χ²= 5.834, P = 0.016), as well as a significantly lower proportion of patients with the outcome of death (χ² = 4. 115, P = 0.042). Compared with the non- KP group, the KP group had significantly higher levels of leukocyte count (Z = -2. 087, P = 0.037), hemoglobin (t = 4. 67, P < 0.001), fibrinogen (Z= -3.300, P=0.001), C-reactive protein (Z = -3.276, P = 0.001), procalcitonin (Z = -0.361, P < 0.001), and alanine aminotransferase (Z = -2.436, P = 0.015). The multivariate logistic regression analysis showed that sepsis (odds ratio [OR] = 9. 110, 95% confidence interval [ Cl] : 1. 268 - 65. 443, P = 0. 028), pulmonary infection (OR= 17. 720, 95% CI: 2. 661 - 118. 010, P = 0. 003 ), and low albumin level (OR= 0. 815, 95 % Cl : 0. 692 - 0. 960, P = 0 . 016 ) were the risk factors for poor prognosis of liver abscess, while ultrasound - guided abscess puncture therapy (OR = 8. 551, 95% Cl: 1. 549 - 47. 195, P = 0 . 014 ) was a protective factor for relatively good prognosis of liver abscess. Conclusion KP liver abscess may be more likely to occur in patients with diabetes mellitus, hypertension, and fatty liver disease. Sepsis, pulmonary infection, and low albumin level are the risk factors for poor prognosis of liver abscess, while ultrasound - guided abscess puncture is a protective factor for relatively good prognosis. Intervention treatment based on the nomogram predictive model established in this study can effectively improve the prognosis of patients with liver abscess. [ABSTRACT FROM AUTHOR]

Copyright of Chinese Journal of Pesticide Science / Nongyaoxue Xuebao is the property of Chinese Journal of Pesticide Science and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Engineering Management & Technology Discussion is the property of Omniscient Pte. Ltd. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Food Safety & Quality is the property of Journal of Food Safety & Quality Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Food Research & Development is the property of Food Research & Development Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Journal of Pesticide Science / Nongyaoxue Xuebao is the property of Chinese Journal of Pesticide Science and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Food Safety & Quality is the property of Journal of Food Safety & Quality Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Iron overload is a metabolic disorder characterized by excessive iron deposition in the liver, pancreas, heart, endocrine organs, etc., resulting in structural damage and dysfunction. The liver is the primary organ for iron storage, and excessive iron deposition induces liver inflammation and fibrosis, which may progress to cirrhosis and even liver cancer, with a poor prognosis. Accurate evaluation and effective treatment can reduce liver injury caused by iron overload and improve patients' survival. [ABSTRACT FROM AUTHOR]