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121.
对于基准背景已知的固定场景,提出估测人数的四步框架,相比2010年D.Conte等的结果显著提高远距离人群的估测精度.精度提高的主要原因在于非最大抑制聚类,这种基于密度的聚类方法对不同拍摄距离的人群采取不同的聚类标准,避免类过大造成的后续问题.PETS2010数据库的实验表明,远距离高密度人群因被分为多类,估测精度明显提高. 相似文献
122.
Studies were designed to determine the effectiveness of challenge‐based instruction (CBI) versus traditional lecture‐based instruction. Comparisons were made over a three‐year period between student performance on knowledge‐based questions in courses taught with taxonomy‐based and challenge‐based approaches to instruction. When performance on all questions was compared, CBI classes scored significantly better than control classes on 26 percent of the questions, while control classes outperformed CBI classes on eight percent of the questions, but there was no significant difference in overall performance. However, students in CBI classes performed significantly better than students in control classes on the more difficult questions (35 percent versus four percent). We attribute these differences to additional opportunities available in CBI classrooms for learners to examine their conceptual understanding. Student surveys indicate a slight preference for the challenge‐based approach. We believe that the challenge‐based approach is effective and has the potential to better prepare students for the workplace and for life‐long learning. 相似文献
123.
Karen Rayne Taylor Martin Sean Brophy Nate J. Kemp Jack D. Hart Kenneth R. Diller 《工程教育杂志》2006,95(2):165-173
This paper is an investigation of the How People Learn (HPL) Legacy Cycle's ability to expand adaptive expertise across the developmental span of high school and college. Participants included high school and college students. Pre‐test data indicated younger students (high school and first‐year college students) were less knowledgeable about the science of stem cells than older students (second‐, third‐, and fourth year college students), and all students were low in adaptiveness. Post‐test data showed that younger students achieved parity with the more advanced students in basic scientific knowledge. The younger students also became highly adaptive by the post‐test, but the older students did not advance beyond their pre‐curriculum levels. We hypothesize that the older students began the intervention with more preconceived notions about stem cells, and thus were less able to think and analyze flexibly within that framework. 相似文献
124.
In the last years several solutions were proposed to support people with visual impairments or blindness during road crossing. These solutions focus on computer vision techniques for recognizing pedestrian crosswalks and computing their relative position from the user. Instead, this contribution addresses a different problem; the design of an auditory interface that can effectively guide the user during road crossing. Two original auditory guiding modes based on data sonification are presented and compared with a guiding mode based on speech messages.Experimental evaluation shows that there is no guiding mode that is best suited for all test subjects. The average time to align and cross is not significantly different among the three guiding modes, and test subjects distribute their preferences for the best guiding mode almost uniformly among the three solutions. From the experiments it also emerges that higher effort is necessary for decoding the sonified instructions if compared to the speech instructions, and that test subjects require frequent ‘hints’ (in the form of speech messages). Despite this, more than 2/3 of test subjects prefer one of the two guiding modes based on sonification. There are two main reasons for this: firstly, with speech messages it is harder to hear the sound of the environment, and secondly sonified messages convey information about the “quantity” of the expected movement. 相似文献
125.
Igor Marjanovic 《Architectural Design》2019,89(4):30-37
Under the stewardship of its iconic chairman Alvin Boyarsky, the Architectural Association (AA) presided over a burgeoning of architectural avant‐garde tendencies that encouraged tutors and students to expand their architectural vocabulary and outlook by embracing issues of sexuality and identity, as well as other art forms. St Louis‐based architect, historian and academic Igor Marjanovic explores this era. 相似文献
126.
127.
This paper describes a system for people indoor localization using omnidirectional cameras and machine learning that significantly reduces the database annotation requirements for the training stage. The most prominent works for people detection are based on machine learning techniques that requires large databases with bounding box annotations (that enclose the people). In this work, a novel multiple classifier system, called Grid of Spatial-Aware Classifiers (GSAC), is proposed, which only requires point-based annotations, allowing to create datasets much faster (and therefore speeding up the system deployment). On the other hand, omnidirectional images have a wider field of view than traditional ones, allowing to monitor a wider area, and thus reducing deployment costs. But in return, they present severe geometric distortions that degrade the performance of state of the art detectors, due to the strong changes in the person appearance caused by the position-dependent distortion. The proposed GSAC satisfactorily addresses this problem by distributing the detection task among all spatial-aware classifiers, so that each classifier has only to deal with a subrange of appearances and distortions. Lastly, a thorough evaluation has been performed on two databases of omnidirectional images: a well-known one and one specifically designed to assess the people detection performance. 相似文献
128.
石铁矛 《沈阳建筑工程学院学报(自然科学版)》1990,6(2):76-85
本文分析了城市老年人户外活动特征,对现状活动设施调查后提出了存在的问题和改进建议,以及活动设施的规划、设计设想等。 相似文献
129.
丁杰 《江汉石油职工大学学报》2007,20(1):80-82
企业要在激烈的竞争中立于不败之地,就必须提升核心竞争力,做好核心员工的资源开发管理工作。在具体做法上一是要突出重点,注重实效,着力加强学科学带头人队伍建设,提高核心员工业务水平;二是要明确需求特点,创新激励机制,把企业与个人的发展前景结合起来,通过工作岗位成才和良好的企业文化氛围留住核心员工。 相似文献
130.
卢耀祖 《江汉石油职工大学学报》2007,20(5):3-5
坚持科学发展观,促进企业又好又快发展,牢固树立职工群众是企业的主人的思想观念,全心全意依靠职工群众办企业,切实摆正管理者的公仆位置,把工作的着眼点和立足点放在面向群众、服务基层、解决实际问题上,切实做到有力为民、有心为民、真正为民是企业管理者学习贯彻"三个代表"重要思想、真正代表职工群众的根本利益的主要表现形式和基本途径。 相似文献