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43301.矩阵因子分解和矩阵集中
[信息传输、软件和信息技术服务业] [2013-11-16]
Motivated by the constrained factorization problems of sparse principal components anal-ysis (PCA) for gene expression modeling, low-rank matrix completion for recommender sys-tems, and robust matrix factorization for video surveillance, this dissertation explores themodeling, methodology, and theory of matrix factorization.
关键词：矩阵；因子分解；集中
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43302.重塑PN结点：隧道开关的维度影响
[信息传输、软件和信息技术服务业,计算机、通信和其他电子设备制造业] [2013-11-16]
Tunneling based field effect transistors (TFETs) have the potential for very sharp On/Off transitions. This can drastically reduce the power consumption of modern electronics. They can operate by either electrostatically controlling the thickness of the tunneling barrier or by exploiting a sharp step in the density of states for switching. We show that current TFETs rely on controlling the thickness of the tunneling barrier but they do not achieve the desired performance. In order to get better performance we need to also exploit a sharp step in the density of states.
关键词：PN结点；维度影响；隧道场效应晶体管（TFET）
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43303.伯克利的3D对象数据集
[信息传输、软件和信息技术服务业] [2013-11-16]
This thesis will review current 3D datasets and find them lacking in variation of scenes,categories,instances,and viewpoints.The Berkeley 3D Object Dataset,which contains color and depth image pairs gathered in real domestic and office environments will be presented.
关键词：3D对象数据集；对象识别；距离图像
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43304.没有外部引用芯片的基准测试和校准
[信息传输、软件和信息技术服务业] [2013-11-16]
The strong market demand for mobile applications such as iPhone makes value on the formfactor of the mobile devices. The form factor means how much we can integrate many functionsin a given size of the mobile devices. The external component size is almost comparable to achip size so that elimination of external component is crucial to the success of mobile devices inaddition to the cost issues of the external components. External reference resistors are often usedas the standard for calibrating voltage sources, current sources, and other component values within a circuit. Often these calibrations occur at a factory, but may also occur on an electronicdevice as it is used. However, external reference resistors consume area and cost and it is desirable to eliminate them.
关键词：移动应用程序；形式因素；外部参考电阻器
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43305.REGIS:一个构建和分配个性化实践问题的工具
[信息传输、软件和信息技术服务业] [2013-11-16]
Regis is a tool for developing and distributing customized problems to groups.The ststem has been designed primarily for college-level students，but is intended to be general enough to apply in a variety of other settings as well，e.g.K-12,informal study groups，and online courses.
关键词：个性化实践；软件；系统；大学生
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43306.通过工作负载管理减少集群能源消耗
[信息传输、软件和信息技术服务业] [2013-11-16]
Energy consumption is a major and costly problem in data centers. For many workloads,a large fraction of energy goes to powering idle machines that are not doing any usefulwork. There are two causes of this inefficiency: low server utilization and a lack of power proportionality.
关键词：能源消耗；负载管理；数据中心
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43307.基于分布式随机梯度下降法的蝴蝶混合沟通效率
[信息传输、软件和信息技术服务业] [2013-11-16]
Stochastic gradient descent is a widely used method to find locally-optimal models in machinelearning and data mining. However, it is naturally a sequential algorithm, and parallelizationinvolves severe compromises because the cost of synchronizing across a cluster is much larger than the time required to compute an optimal-sized gradient step. Here we explore butterfly mixing, where gradient steps are inter leaved with the k stages of a butterfly network on 2k nodes.Udp based butterfly mix steps should be extremely fast and failure-tolerant, and convergence is almost as fast as a full mix (All Reduce) on every step.
关键词：随机梯度下降法；蝴蝶混合；机器学习；数据挖掘；顺序算法；
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43308.促进腿式机器人自动调谐的增强学习方法研究
[信息传输、软件和信息技术服务业,计算机、通信和其他电子设备制造业] [2013-11-15]
I worked on improving the walking speed and autonomous behaviour of OctoRoACH, an inexpensive and robust palm-sized eight legged robot developed by the Biomimetic Millisystems Lab, together with my capstone project members and advisors at UC Berkeley. Our results show that reinforcement learning algorithms is useful to improve the walking speed of existing search and rescue robots across different terrains and save more lives during disaster situations.
关键词：步行机；腿式机器人；自动调谐；增强学习算法；行走速度
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43309.分布式程序的聚集分析：一种模型理论方法
[信息传输、软件和信息技术服务业] [2013-11-15]
Building on recent interest in distributed logic programming, we take a model-theoretic approach to analyzing confluence of asynchronous distributed programs.We introduce DedalusS , a restriction of Dedalus that allows a kind of stratified negation, but retains the confluence of Dedalus+ and similarly captures PTIME.
关键词：分步式逻辑程序；模型理论；异步分布；PTIME
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43310.促进腿式机器人自动调谐的强化学习方法
[信息传输、软件和信息技术服务业,计算机、通信和其他电子设备制造业] [2013-11-15]
In this paper we evaluate the need for a reinforcement learning algorithm to optimize the gait of OctoRoACH, a hand-sized eight-legged robot. We then perform an evaluation of a likelihood-ratio gradient policy and compare it against our hand-tuned results. Finally, we suggest a different approach to reduce the policy search space that can make the problem more manageable.
关键词：腿式机器人；步行机；强化学习算法；搜索范围
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