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The ORB (oriented FAST and rotated BRIEF) feature detection algorithm is shown to have significant variances in the number of extracted feature points and the accuracy of matching in blurry scenes and environments with drastic lighting changes. Additionally, feature points tend to cluster at the corners of image objects. In response to these issues, an improved ORB feature detection algorithm was proposed. Firstly, the multi-scale retinex (MSR) algorithm was employed to enhance the features of the image. Subsequently, the image was divided into grids, and the threshold for feature point detection was adjusted based on the grayscale distribution of each grid. Finally, a dynamic regional non-maximal suppression method was adopted to filter the optimal feature points. The experimental results indicate that, compared to the original ORB algorithm, the distribution of feature points extracted by the improved algorithm is more uniform across images. The repeatability rate of feature points remains stable at over 75% when the brightness varies within a range of 80%, and the accuracy of matching is on average increased by 22% . [ABSTRACT FROM AUTHOR]

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Copyright of Shandong Medical Journal is the property of Shandong Medical Health Newspapers 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 China Mechanical Engineering is the property of Editorial Board of China Mechanical Engineering 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 West China Journal of Stomatology is the property of Sichuan University, West China College of Stomatology 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 West China Journal of Stomatology is the property of Sichuan University, West China College of Stomatology 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 Nanchang University (Natural Science) is the property of Journal of Nanchang University (Natural Science) Editorial Office 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 Modern Medicine & Health is the property of Journal of Modern Medicine & Health 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.)

目的　了解急性轻中度脑梗死患者血浆脂蛋白磷脂酶A2（Lp-PLA2）水平升高的影响因素。方法　将 231例急性轻中度脑梗死患者根据血浆Lp-PLA2值分为低水平组（Lp-PLA2<100 ng/mL）75例、中水平组（Lp-PLA2 100 ng/mL~<200 ng/mL）84例及高水平组（Lp-PLA2≥200 ng/mL）72例，收集三组患者临床资料，如年龄、性别、高血 压病史、糖尿病病史、吸烟史、饮酒史，脑梗死严重程度，血浆 UA、TC、TG、HDL-C、LDL-C、LP（a）、LP（b）、Hcy、FBG、 CRP等，经过单因素分析和多因素分析筛选Lp-PLA2水平升高的独立影响因素。结果　单因素分析结果显示，脑梗 死严重程度、UA、TC、HDL-C、LDL-C、LP（a）、LP（b）、CRP是导致急性轻中度脑梗死患者血浆Lp-PLA2水平升高的影 响因素。Logistic回归分析结果显示，HDL-C是急性轻中度脑梗死患者Lp-PLA2水平升高的独立保护性因素（OR= 0. 252，95%CI：0. 094～0. 673，P=0. 006）；LDL-C、CRP、脑梗死严重程度是急性轻中度脑梗死患者血浆Lp-PLA2水平 升高的独立危险因素（OR=1. 57，95% CI：1. 002～2. 459，P=0. 049；OR =2. 091，95% CI：1. 268～3. 446，P=0. 004； OR =0. 099，95%CI：0. 053～0. 184，P<0. 01）。结论　急性轻中度脑梗死患者血浆Lp-PLA2水平升高的影响因素为 HDL-C、LDL-C、CRP、脑梗死严重程度。 [ABSTRACT FROM AUTHOR]

Copyright of CT Theory & Applications is the property of Editorial Department of CT Theory & Applications 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 Telecommunication Engineering is the property of Telecommunication Engineering 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 Systems Engineering & Electronics is the property of Journal of Systems Engineering & Electronics 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 Journal of Chongqing University of Posts & Telecommunications (Natural Science Edition) is the property of Chongqing University of Posts & Telecommunications 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 verify the expression of RGS17 (Regulator of G-protein signaling 17, RGS17) in coronary artery wall with sudden coronary heart disease by immunohistochemical staining. Methods 41 cases of sudden death from coronary heart disease (experimental group) and 10 cases of non-cardiogenic death (control group) were collected. According to the degree of coronary stenosis, they were divided into experimental group 1 (grade I-II), experimental group 2 (grade III) and experimental group 3 (grade IV). The expression of RGS17 in coronary artery tissue of CHD was detected by immunohistochemistry. Four fields of view were taken for each slice, and the single-factor analysis of variance was performed using SPSS23.0 after determining the average optical density value. Results In the 41 cases of sudden death from coronary heart disease, most of them were males, ranging from 41 to 50 years old. Coronary artery stenosis was more common in grade IV. Immunohistochemical staining showed that the expression of RGS17 in coronary artery wall of sudden death from coronary heart disease was significantly higher than that of control group (P<0.05), and the expression of RGS17 in coronary artery stenosis grade III and IV was significantly higher than that of grade I and II. Conclusion RGS17 is highly expressed in coronary artery wall of sudden death patients with coronary heart disease, and the expression of RGS17 in coronary artery stenosis grade III and IV is significantly higher than that in stenosis grade I and II [ABSTRACT FROM AUTHOR]

Copyright of Arid Zone Research / Ganhanqu Yanjiu is the property of Arid Zone Research Editorial Office 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.)

Aimed at the present issues on teachers’ teaching quality evaluation behavior deviation widespread among domestic institutions and universities, based on the present teaching quality evaluation index, from three aspects about the historical role and teaching orientation, policy environment and conditions of the hardware and, the index system and evaluation conclusion, this paper analyzes the reasons for teachers’ experiment and training teaching quality evaluation behavior deviation. And a reform program is proposed. It contains that at present stage colleges and universities should strengthen the recognition of the equal status of experimental training and classroom teaching, increase the support for experimental training and adhere to the combination of quantitative and qualitative way to build a scientific and reasonable experiment and training teaching quality evaluation system reforms. Combined with the reform practice, the guiding ideology, implementation method, evaluation index and specific requirements of the reform plan are discussed in detail. This research could provide a reference function on experiment and practice teaching quality construction practice for science and engineering majors in domestic colleges and universities. [ABSTRACT FROM AUTHOR]

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Copyright of Journal of Forensic Medicine / Fayixue Zazhi is the property of Journal of Forensic Medicine Editorial Office 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 Kunming Medical University / Kunming Yike Daxue Xuebao is the property of Kunming Medical Journal 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.)

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Copyright of Guihaia is the property of Guihaia Editorial Office 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.)

目的 观察花粉阻隔剂联合鼻用抗组胺药治疗儿童变应性鼻炎(AR)的临床效果。方法 将69例AR患儿随机分为两组,对照组给予鼻用抗组胺药治疗,观察组给予花粉阻隔剂联合鼻用抗组胺药治疗,疗程4周。于治疗前及治疗2、4周时对两组进行鼻部症状视觉模拟量表(VAS)评分、鼻结膜炎生存质量(RQLQ)评分,比较两组临床疗效,记录不良反应发生情况。结果 两组治疗后VAS评分、RQLQ评分均下降,且治疗4周时明显低于治疗2周时,观察组评分低于对照组(P均<0.05)。观察组总有效率为94.44%,对照组为72. 73%,观察组总有效率高于对照组(P <0.05)。两组均无明显不良反应发生。结论 花粉阻隔剂联合鼻用抗组胺药治疗儿童AR安全、有效,可显著改善患儿鼻部症状,提高其生存质量。 [ABSTRACT FROM AUTHOR]