扩展目标跟踪Student’s t逆Wishart平滑算法

脉冲干扰和离群量测信息等因素通常会导致异常的厚尾噪声,这使得以高斯假设为前提的扩展目标跟踪(ETT)估计器的性能急剧降低,针对该问题该文提出一种基于扩展目标随机矩阵模型(RMM)的Student’s t逆Wishart平滑(StIWS)算法。首先,将目标的运动状态以及过程噪声和量测噪声建模为Student’s t分布以表征异常噪声对扩展目标概率分布的影响,将目标扩展状态建模为服从逆Wishart分布的随机矩阵。然后,在Student’s t贝叶斯平滑框架下,详细推导了能在扩展目标的多重特征动态演变的过程中有效估计目标状态的StIWS算法。最后,通过扩展目标跟踪的仿真实验结果和真实场景实验结果验证了所提算法的有效性。

Cross-Cultural Adjustment and Coping:U.S.Students in Taiwan Residents Higher Education

The aim of this study was to investigate the adjustment problems of students from the United States enrolled in universities in the East,specifically in Taiwan,their problems related to cultural adaptation,and the process of adjustment to student life in Taiwan.Under investigation were cultural adjustment and coping skills as these students transitioned from West to East.Qualitative data were collected from interviews with participants and faculty members as well as participant observations.Results indicated that U.S.students found their own ways to acclimate to their new academic setting as well as to social relations,cross-cultural issues,and the linguistic environment in Taiwan to achieve effective adaptation.They made changes in themselves to cope with all situations they encountered.This study provides suggestions for international students abroad in Taiwan,for the Taiwan Residents government,and for universities or colleges in terms of what they should offer to current and future international students.

Analysis of New Senior English for China Student’s Book 1

This article will firstly discuss the context overview of English teaching and learning in China. Under thiscircumstance, a problematic element will be examined of the New Senior English for China Student’s Book 1 and critical appraisal ofhow this element relates to other elements of curriculum development will be analyzed. The recommended changes and demonstrationmechanisms for evaluating the changes are put forward in the last two parts.

“优师计划”背景下师范生U-G-S培养模式价值、问题及对策

从“优师计划”背景下师范生U-G-S培养模式价值分析入手,剖析“优师计划”背景下师范生U-G-S培养模式中地方政府、师范院校、中小学校、师范生四个基本要素各自存在问题,提出“四位一体”师范生U-G-S培养模式提升对策,以当地政府为主导、以师范院校为引领、以中小学校为核心、以师范生为主体,统筹各方培养资源和优势力量,激活多方利益主体意愿,助力乡村卓越教师的培养。

Evaluation of Technical Education by Using a Modern Structured MOODLE Laboratory Course, in Relation to Recent Data

E-learning platforms support education systems worldwide, transferring theoretical knowledge as well as soft skills. In the present study high-school pupils’, and adult students’ opinions were evaluated through a modern structured MOODLE interactive course, designed for the needs of the laboratory course “Automotive Systems”. The study concerns Greek secondary vocational education pupils aged 18 and vocational training adult students aged 20 to 50 years. The multistage, equal size simple random cluster sample was used as a sampling method. Pupils and adult students of each cluster completed structured 10-question questionnaires both before and after attending the course. A total of 120 questionnaires were collected. In general, our findings disclosed that the majority of pupils and adult students had significantly improved their knowledge and skills from using MOODLE. They reported strengthening conventional teaching, using the new MOODLE technology. The satisfaction indices improved quite, with the differences in their mean values being statistically significant.

Student’s Health Exercise Recognition Tool for E-Learning Education

Due to the recently increased requirements of e-learning systems,multiple educational institutes such as kindergarten have transformed their learning towards virtual education.Automated student health exercise is a difficult task but an important one due to the physical education needs especially in young learners.The proposed system focuses on the necessary implementation of student health exercise recognition(SHER)using a modified Quaternion-basedfilter for inertial data refining and data fusion as the pre-processing steps.Further,cleansed data has been segmented using an overlapping windowing approach followed by patterns identification in the form of static and kinematic signal patterns.Furthermore,these patterns have been utilized to extract cues for both patterned signals,which are further optimized using Fisher’s linear discriminant analysis(FLDA)technique.Finally,the physical exercise activities have been categorized using extended Kalmanfilter(EKF)-based neural networks.This system can be implemented in multiple educational establishments including intelligent training systems,virtual mentors,smart simulations,and interactive learning management methods.

厚尾噪声条件下星凸形扩展目标student’s t滤波器

针对非线性非高斯厚尾噪声条件下的不规则形状的扩展目标跟踪问题,提出了基于随机超曲面模型(RHM)的星凸形扩展目标student’s t滤波算法.首先,在带有非高斯厚尾过程噪声和厚尾量测噪声的系统中,基于student’s t分布给出鲁棒student’s t滤波器.其次,利用随机超曲面模型描述任意星凸形扩展目标的量测源分布,提出带厚尾噪声的星凸形扩展目标student’s t滤波器.最后通过仿真验证了所提方法的正确性和有效性.

基于C/S模式的高校体育教学体能监测方法

为了提升体能监测方法的并行加速比,设计了基于C/S模式的高校体育教学体能监测平台。利用物联网技术设计了平台的硬件框架和数据库;采用C/S模式设计平台的软件框架,通过数据分析与处理、实时采集、设备及用户信息管理和三维场景实现平台软件的功能,在软件设计中利用专家访谈法和特尔斐法构建体育教学体能监测指标,采用模糊综合评价法实现户外体育教学的学生体能监测。实验结果表明,所提方法的收敛性能好、并行加速比高、吞吐量高。

“U-G-S”协同视角下师范生教育实习模式优化研究

“U-G-S”协同教育实习模式是协同理论在教育领域的应用,强调高校、政府和中小学共同致力于师范生实习工作。“U-G-S”协同教育实习有助于形成师范生培养合作共同体,促进教育理论与实践对话,提高师范生教育实习质量。然而,通过田野调查发现,目前的教育实习模式存在政府对教育实习管理不到位、高校对教育实习不重视与实习基地指导能力不足等问题。借鉴英国、加拿大的教育实习经验,优化我国教育实习模式的可行路径是:强化政府对“U-G-S”协同教育实习的治理责任,优化高校对“U-G-S”协同教育实习的教学管理,提升实习基地的指导能力。

Student’s t滤波框架下的信息融合算法

针对多传感器系统的观测噪声为非高斯噪声的问题,通过Student’s t滤波框架和四元数特性相结合,以无迹变换计算Student’s t加权积分函数,设计基于Student’s t分布的无迹四元数滤波算法,作为局部滤波算法.利用拉格朗日乘子法计算最优融合权重系数,通过线性加权融合的方式,对各局部滤波结果进行融合.采用基于四元数的目标姿态运动模型进行仿真,利用3个星敏感器同时对同一目标进行观测,通过与已有的鲁棒无迹Student’s t滤波(RSTUF)算法对比,验证所提算法的有效性.仿真结果表明:所提算法在对目标姿态的估计精度、滤波收敛速度及收敛后的数值稳定性方面均高于RSTUF算法;通过多个观测信息互补,提高了估计精度及容错性.

基于B/S结构的学生选课系统设计与实现

针对传统选课方式存在的不足,设计基于浏览器/服务器模式(Browser/Server,B/S)结构的学生选课系统。首先介绍了B/S和SQL Server数据库的基本原理,其次分析了学生用户需求、教师用户需求以及教务管理需求,最后探讨了系统中学生、教师及教育管理员的设计内容。测试结果表明,该系统的响应速度快,能够满足高校师生及教务管理的需求。

A Novel Fusion System Based on Iris and Ear Biometrics for E-exams

With the rapid spread of the coronavirus epidemic all over the world,educational and other institutions are heading towards digitization.In the era of digitization,identifying educational e-platform users using ear and iris based multi-modal biometric systems constitutes an urgent and interesting research topic to pre-serve enterprise security,particularly with wearing a face mask as a precaution against the new coronavirus epidemic.This study proposes a multimodal system based on ear and iris biometrics at the feature fusion level to identify students in electronic examinations(E-exams)during the COVID-19 pandemic.The proposed system comprises four steps.Thefirst step is image preprocessing,which includes enhancing,segmenting,and extracting the regions of interest.The second step is feature extraction,where the Haralick texture and shape methods are used to extract the features of ear images,whereas Tamura texture and color histogram methods are used to extract the features of iris images.The third step is feature fusion,where the extracted features of the ear and iris images are combined into one sequential fused vector.The fourth step is the matching,which is executed using the City Block Dis-tance(CTB)for student identification.Thefindings of the study indicate that the system’s recognition accuracy is 97%,with a 2%False Acceptance Rate(FAR),a 4%False Rejection Rate(FRR),a 94%Correct Recognition Rate(CRR),and a 96%Genuine Acceptance Rate(GAR).In addition,the proposed recognition sys-tem achieved higher accuracy than other related systems.

Modeling and forecasting exchange rate volatility in Bangladesh using GARCH models:a comparison based on normal and Student's t-error distribution

Background:Modeling exchange rate volatility has remained crucially important because of its diverse implications.This study aimed to address the issue of error distribution assumption in modeling and forecasting exchange rate volatility between the Bangladeshi taka(BDT)and the US dollar($).Methods:Using daily exchange rates for 7 years(January 1,2008,to April 30,2015),this study attempted to model dynamics following generalized autoregressive conditional heteroscedastic(GARCH),asymmetric power ARCH(APARCH),exponential generalized autoregressive conditional heteroscedstic(EGARCH),threshold generalized autoregressive conditional heteroscedstic(TGARCH),and integrated generalized autoregressive conditional heteroscedstic(IGARCH)processes under both normal and Student’s t-distribution assumptions for errors.Results and Conclusions:It was found that,in contrast with the normal distribution,the application of Student’s t-distribution for errors helped the models satisfy the diagnostic tests and show improved forecasting accuracy.With such error distribution for out-of-sample volatility forecasting,AR(2)–GARCH(1,1)is considered the best.

带厚尾噪声的鲁棒Student’s t容积滤波器

为了解决带厚尾过程和量测噪声的非线性状态估计问题,本文提出了一种新的鲁棒非线性滤波器.首先,对带厚尾过程和量测噪声的非线性系统进行了数学建模,并推导了基于Student’s t近似的鲁棒非线性滤波器(RSTNF)的一般结构.其次,针对RSTNF中涉及到的含有关于Student’s t分布的多维非线性函数积分的求解问题,提出了基于Student’s t分布的球径容积准则(STSRCR),并在此基础上设计了一种新的鲁棒Student’s t容积滤波器(RSTCF).最后,利用目标跟踪仿真验证了本文提出的带厚尾噪声的RSTCF的有效性以及与现有方法相比的优越性.

Quality of Nursing Courses as Perceived by Students: Relationship with Their Academic Achievement in Palestine College of Nursing

The purpose of this study was to determine the Bachelor Science of Nursing (BSN), student’s perceptions of the quality of nursing courses taught at Palestine College of Nursing (PCN), which were fundamentals of nursing course, adult nursing course, pediatric nursing course, maternity nursing course, community nursing course, mental health and psychiatric nursing course and nursing management and leadership course, and its relationship with their academic achievement. The Palestine College of Nursing is governmental and Ministry of Health (MOH) affiliated. The sample included 467 nursing students registered in the college who studied the previously mentioned nursing courses. Data were collected using a self-administered questionnaire developed by the researcher, and guided by literature. That was to assess the included nine quality dimensions of the nursing courses as perceived by the students. Content validity and reliability tests were done for the tool. The study revealed that the total students’ perceptions of the quality of all nurses courses were within average quality level (80.42%). The nursing management course and community health nursing course were of the first two ranks of high quality level (84.54%, and 84.48%, respectively), where mental health and psychiatric nursing course, fundamentals of nursing course, adult health nursing course, pediatric nursing course and maternity health nursing course were the next ranks of average quality level. The study revealed that students’ perceptions of seven dimensions from nine were with average quality level (80.50%). The first rank was the “teacher/instructor characteristics and attributes”, dimension of high quality level (84.44%), while the last rank was “teaching methodology” dimension of average quality level (77.54%). There was a positive relationship between students’ achievement and the courses’ quality dimensions, pertaining objectives of the course, contents of the course, teacher/instructor competencies, teacher characteristics, teaching methodology, students/teacher interaction and course evaluation. The study recommended improving the quality of nursing courses for better level and to improve the quality of some dimensions like using different teaching strategies, the quality of clinical settings, and improve the quality of nursing instructors in some clinical areas. Finally the researcher recommend for further studies about concerning quality in nursing education.

Beyond Bloom’s: Students’ Perception of Bloom’s Taxonomy and its Convolution with Cognitive Load

Bloom’s taxonomy is widely used in educational research to categorize the cognitive skills required to answer exam questions.For this study,we analyzed how students categorize exam questions(high-level question or low-level question,)gathered data as to their rationale for categorization,and compared their categorizations to those of experts.We found that students consistently rank high-level questions incorrectly.We analyzed student reasons for their categorizations,and found that for many of the incorrectly categorized questions the students referred to reasons related to Cognitive Load Theory.This shows that cognitive load prevents students from accurately assessing the cognitive level of an exam question.Thus,extra cognitive load in exam questions may prevent those questions from accurately measuring the skills and knowledge of the student.This points to the need for instructors to eliminate cognitive load from their exams.

写本学视域下S.4504写本综合研究

S.4504写本背面所抄内容丰富且芜杂。其原为佛教写本,废弃后背面被反复利用。卷背所抄内容有正书,有倒书,字迹不一,其独特的文献样貌乃是不同人在不同时间利用卷背空白抄写的结果。通过分析卷背的抄写情况,可知其背面先为“孝子信智”作练习,后另一寺院学士郎为同其进行区分,从另一端起笔抄写,故而形成倒书。最后又为敦煌僧人用于抄写文范、牒文。写本背面内容涉及寺学郎学习、经济借贷、政治交流及日常生活,对该写本进行综合研究有助于进一步探究写本的重复利用,明晰敦煌寺学郎的知识体系。

Design and implementation of the system of students information management based on WEB

This paper mainly design B/S system structure and small information management system that often appear some problems of college student information management, combines the actual situation of students and student instructor management work. In the process of the development of the whole system, the main use of Microsoft.NET technology as a whole system of compiler environment, SQL Server 2000 is used in the design of backstage supporter＇ s database, were developed and designed by Visual Studi02005 tool, in exchange for page dynamically selected by the ASP.NET database and system interface between Webpage generation. This system has high reliability, high security, low input, so that the efficiency of information management students to improve.

A Research on Middle School Students'English Reading Obstacles and Strategies

English reading,a key procedure of English learning and teaching in middle school,is an essential way of getting information from the globe and communicating with others.Therefore,efficient comprehension on reading materials will directly serve for accepting the information.And it is extremely important for middle school students to acquire certain reading ability.At present,great attention has been paid to the course of reading in the instruction of English by the Chinese Education Department.But middle school students'read ing ability is still much lower than the target they should reach because of a set of existing obstacles that prevent them from being effective English readers.What are these obstacles? How to break them down? This paper will first point out and then analyze the obstacles that af fect middle school students'reading ability from two aspects:linguistic obstacles(obstacles of lexicon,grammar and background knowl edge) and non-linguistic obstacles(obstacles of psychology,interest,skill,and habit).After demonstrating different obstacles,the paper also come up with some corresponding strategies in the hope of helping middle school students to be effective English readers.

做好Student’s Daily Presentation，实现英语有效教学

Student’s Daily Presentation给每个学生提供一个机会，让他们在同学们面前展示自己的风采。在活动中，作为组织者的教师应认识到不同年龄段学生知识构成和心理特点，针对英语学科特点，有效地开展Student’s Daily Presentation活动，为学生创造体验英语，学以致用的机会，进而实现全面提升语言能力的目标。