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Formation of an Original Database and Development of Innovative Deep Learning Algorithms for Detecting Face Impersonation in Online Exams

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Open Journal of Applied Sciences 2023年第12期13卷 2223-2232页

作者： Konan Yao Tiémoman Kone Venance saho Zoh Department of Computer Science and Digital Science Virtual University of C&#244te d’Ivoire Abidjan C&#244te d’Ivoire

The issue related to the risk of identity impersonation, where one person can be replaced by another in online exam surveillance systems, poses challenges. This study focuses on the effectiveness of detecting attempts of identity impersonation through face substitution during online exams, with the aim of ensuring the integrity of assessments. The goal is to develop facial recognition algorithms capable of precisely detecting these impersonations, training them on a tailored database rather than biased generic data. An original database of student faces has been created. An algorithm leveraging advanced deep learning techniques such as depthwise separable convolution has been developed and evaluated on this database. We achieved very high levels of precision, reaching an accuracy rate of 98% in face detection and recognition.

关键词： Online Exams Face Recognition Convolutional Neural Networks Data Bias

Analysis of Students’ Preferences and Engagement with Mobile Games: A Study of Game Assets and Colour Impact

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Open Journal of Applied Sciences 2023年第12期13卷 2211-2222页

作者： Venance saho Zoh Tiémoman Koné Yao Konan Informatique et Sciences du Numérique Université Virtuelle de C&#244te d’Ivoire Abidjan C&#244te d’Ivoire

Mobile games are gaining in popularity among students, although the factors driving engagement remain poorly understood. This study, conducted among 378 students studying for a Bachelor’s degree in Computer and Digital Sciences at the Université Virtuelle de Côte d’Ivoire, explores the influence of game assets and colours on player engagement. Using an online questionnaire, the study identified students’ gaming preferences and their perception of colours. The results show that the key elements most favoured by students are graphics, sound design, the game system, narrative, interactivity and accessibility. What’s more, colour plays a decisive role in their preferences and commitment to educational mobile games.

关键词： Engagement Game Assets Colour Mobile Games

Shedding of TNFR1 in regenerative liver can be induced with TNF α and PMA

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World Journal of Gastroenterology 2002年第6期8卷 1129-1133页

作者： MinXia saho-BaiXue Cun-ShuanXu CollegeofLifeScience HenanNormalUniversityXinxiang453002 CollegeofLifeScience HenanNormalUniversityXinxiang453002HenanProvinceChina TheInstituteofCellResearch BeijingNormalUniversityBeijing100875

AIM: Liver regeneration is associated with apoptosis of hepatocytes, which is mediated via tumor necrosis factor receptor 1(TNFR1). The shedding of TNFR1 in liver regeneration and its mechanism to regulate this shedding were investigated.METHODS: The shedding of TNFR1 in liver regeneration and changes of TNF-α, PMA and plasma membrane purified from hepatocytes on this shedding process were measured with Western blot. Then, the relationship between TNFR1 shedding and apoptosis of hepatocytes induced by TNFα was studied by detecting apoptotic index.RESULTS: The shedding of TNFR1 began at 4 hours and terminated before 2 months after partial hepatectomy. In culture system, serum from rats at 36 h after partial hepatectomy could also promote this shedding process. With the stimulation of TNF α, PMA or purified plasma membrane from hepatocytes at 36 h after partial hepatectomy or from hepatocytes treated with TNF α for 2 h, membranous TNFR1 was also shed. With the stimulation of both TNF α and plasma membrane from hepatocytes affected with TNF α for 2 hor from hepatocytes at 36 h after partial hepatectomy, apoptotic index of hepatocytes decreased from 21% to 7.52 % and 8.45 %, respectively. PMA could also reduce apoptotic index to 13.67 %. This descent occurred in hepatocytes cultured in serum from rats at 36 h after partial hepatectomy too,but not in serum from rats at 2 months after partial hepatectomy and sham-operated rats.CONCLUSION: Shedding of TNFR1 may help reduce apoptosis of hepatocytes induced by TNFα. Membraneanchored metalloprotases could play a role in shedding membranous TNFR1. At the same time, PKC may take part in regulation of this shedding process.

关键词： TNFR1 PMA 肝切除肝再生肝细胞凋亡肝细胞膜受体脱落

Fundamental Properties and Optimal Gains of a Steady-State Velocity Measured <i>α</i>-<i>β</i>Tracking Filter

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Advances in Remote Sensing 2014年第2期3卷 61-76页

作者： Kenshi saho Department of Electronic and Computer Engineering Ritsumeikan University Kusatsu Japan

This paper clarifies the steady-state properties and performance of an α-β filter for moving target tracking using both position and velocity measurements. We call this filter velocity measured α-β (VM-α-β) filter. We first derive the stability condition and steady-state predicted errors as fundamental properties of the VM-α-β filter. The optimal gains for representative motion models are then derived from the Kalman filter equations. Theoretical and numerical analyses verify that VM-α-β filters with these optimal gains realize more accurate tracking than conventional α-β filters when the filter gains are relatively large. Our study reveals the conditions under which the predicted errors of the VM-α-β filters are less than those of conventional α-β filters. Moreover, numerical simulations clarify that the variance of the tracking error of the VM-α-β filters is approximately 3/4 of that of the conventional α-β filters in realistic situations, even when the accuracy of the position/velocity measurements is the same.

关键词： α-β Filter Moving Target Tracking Velocity Measurement Kalman Filter Optimal Gain

基于参数辨识的配电网相间永久性故障识别方法

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分布式能源 2022年第1期7卷 37-45页

作者：焦卓邵文权关欣贺雨昕西安工程大学电子信息学院陕西省西安市710048

为了避免配电线路相间故障跳闸后自动重合闸盲目重合于永久性故障带来的危害,提出了一种基于参数辨识的配电网相间永久性故障的识别方法。该方法在配电线路相间故障三相跳闸后,依次对停电线路的3个相间回路主动施加低频电压扰动信号,利... 详细信息

为了避免配电线路相间故障跳闸后自动重合闸盲目重合于永久性故障带来的危害,提出了一种基于参数辨识的配电网相间永久性故障的识别方法。该方法在配电线路相间故障三相跳闸后,依次对停电线路的3个相间回路主动施加低频电压扰动信号,利用激励侧的电流和电压信息建立相间回路的参数方程,采用参数辨识的思想进行相间回路状态的甄别。以无故障相间回路为计算模型,依据电阻和电感参数的识别值与实际回路中真实值之间的偏差判别故障性质。当识别值与真实值偏差较大时,则实际相间回路模型与计算模型不一致,判为永久性故障。PSCAD建模仿真计算结果表明,所提出的永久故障判别方法能够有效辨识故障性质,且基本不受过渡电阻和故障位置等因素影响,有助于实现配电网三相自适应重合闸。

关键词：配电网主动扰动参数识别三相重合闸永久性故障

非物质文化遗产保护背景下的地域文化保护与利用--以方言为例

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河北学刊 2008年第2期28卷 201-203页

作者：辛儒孔旭红邵凤芝河北大学博物馆河北保定071002 河北大学旅游系河北保定071002

非物质文化遗产是人类推动文化持续发展的不竭源泉。方言是中国民族文化、地域文化多样性的体现,保护方言,就是保护民族多样性的文化、捍卫绚丽多彩的中华文明。本文就方言作为非物质文化遗产的属性以及方言的保护和利用之间的关系进行... 详细信息

非物质文化遗产是人类推动文化持续发展的不竭源泉。方言是中国民族文化、地域文化多样性的体现,保护方言,就是保护民族多样性的文化、捍卫绚丽多彩的中华文明。本文就方言作为非物质文化遗产的属性以及方言的保护和利用之间的关系进行了探讨,指出当前中国亟待保护方言,并就其保护与利用提出了一些建议;同时,也对非物质文化遗产保护中的有关措施进行了探讨。

关键词：方言非物质文化遗产保护地域文化开发

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微孔磷铝分子筛新型合成方法的研究进展

常州大学学报（自然科学版） 2010年第4期22卷 75-78页

作者：韶晖钟璟常州大学石油化工学院江苏常州213164

综述了微孔磷铝分子筛的合成方法,着重介绍了近几年来制备磷铝分子筛的新型合成方法,包括干凝胶法(气相转移法和干胶法)、微乳合成法、离子热等,并与传统的水热合成法进行了比较。

关键词：磷铝分子筛干凝胶法微乳合成法离子热

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新型速凝材料注浆加固富水破碎带机制分析

隧道建设 2015年第4期35卷 303-310页

作者：谢波邵金鹏高波唐波南京市轨道交通建设工程质量安全监督站江苏南京210015 南京地铁建设有限责任公司江苏南京210015 中铁隧道集团有限公司河南洛阳471009

富水断层破碎带是治理难度较大的不良地质体,针对南京地铁建设中基坑大面积涌水、支护结构沉降变形及常规注浆材料防渗加固效果有限的问题,基于水文地质和高密度电法,分析基坑涌水的渗流状态;通过室内试验测定新型速凝浆液的初终凝时间... 详细信息

富水断层破碎带是治理难度较大的不良地质体,针对南京地铁建设中基坑大面积涌水、支护结构沉降变形及常规注浆材料防渗加固效果有限的问题,基于水文地质和高密度电法,分析基坑涌水的渗流状态;通过室内试验测定新型速凝浆液的初终凝时间、结石体强度及结石率,得出该材料具有较好的可注性和可行性;采用COMSOL数值软件,联合仿真模拟了富水破碎带注浆加固过程,对比分析注浆前后基坑渗流规律,并基于此开展了现场注浆试验;利用地质雷达和压水试验对注浆效果进行验证,结果显示该新型速凝材料对富水破碎带加固效果良好,COMSOL联合仿真对注浆设计有科学的指导性。

关键词：地铁基坑涌水富水破碎带水泥基速凝材料动水注浆 COMSOL联合仿真

电针夹脊穴联合补肾通络方治疗脊髓型颈椎病30例临床观察

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中国民族民间医药 2018年第22期27卷 109-111页

作者：徐丽莺邵斌福建卫生职业技术学院福建福州350001 福建省立医院康复医学科福建福州350001

目的:观察电针夹脊穴联合补肾通络方治疗脊髓型颈椎病的临床疗效。方法:选取60例患者随机分为对照组和观察组各30例。对照组采用中药补肾通络方治疗,观察组采用电针夹脊穴联合补肾通络方治疗,共4个疗程。结果:两组治疗后JOA评分明显优... 详细信息

目的:观察电针夹脊穴联合补肾通络方治疗脊髓型颈椎病的临床疗效。方法:选取60例患者随机分为对照组和观察组各30例。对照组采用中药补肾通络方治疗,观察组采用电针夹脊穴联合补肾通络方治疗,共4个疗程。结果:两组治疗后JOA评分明显优于治疗前(P <0. 05),且观察组改善程度明显优于对照组(P <0. 05)。依据中医病证诊断疗效标准,观察组总有效率93. 3%,优于对照组的80. 0%(P <0. 05)。结论:电针夹脊穴联合补肾通络方可明显改善脊髓型颈椎病患者的脊髓功能,提高其生活质量。

关键词：脊髓型颈椎病电针夹脊穴补肾通络方