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1651.SoftNIC:软件网卡增加硬件
[信息传输、软件和信息技术服务业] [2015-07-07]
As the main gateway for network traffic to a server, the network interface card (NIC) is an ideal place to incorporate diverse network functionality, such as traffic control, protocol offloading, and virtualization. However, the slow evolution and inherent inflexibility of NIC hardware have failed to support evolving protocols, emerging applications, and rapidly changing system/network architectures. The traditional software approach to this problem—implementing NIC features in the host network stack—is unable to meet increasingly challenging performance requirements.
关键词:网络接口卡;NIC;网络协议栈
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1652.可视化编程语言的远程结对编程
[信息传输、软件和信息技术服务业] [2015-07-07]
With the growing popularity and global ubiquity of massive open online courses (MOOCS), the demand for new technology to support remote collaboration has similarly increased. In the domain of computer science, collocated pair programming is common in introductory courses, but not well studied in the remote MOOC context despite its increasing prevalence. Introductory computer science courses also employ visual programming languages that allow students to write code by dragging and dropping blocks on the screen. We wanted to formulate a solution that recreates the same learning experience that collocated pair programming for a visual programming language o ffers.
关键词:大规模开放网络课程;MOOCS;可视化编程语言
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1653.贝叶斯知识溯源教育影片的策展应用
[信息传输、软件和信息技术服务业] [2015-07-07]
With the popularity of MOOCs and other online learning platforms such as Khan Academy, the role of online education has continued to increase in relation to that of traditional on-campus instruction. At the same time, the need for analytical methods suited for the uniquely large and diverse populations that they serve has grown apace. In particular, as instructors and creators of online educational content grapple with these complex issues, the imperfect transfer of traditional informal, frequently affect-oriented methods of content iteration becomes clear. The need for additional quantitative tools for evaluating course content, taken alongside the opportunity presented by the scope and size of the data associated with such large enrollment courses, poses an interesting problem for analysis.
关键词:MOOCs;在线学习平台;贝叶斯;教育影片
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1654.工程教育的形式化方法
[信息传输、软件和信息技术服务业] [2015-07-07]
The advent of massive open online courses (MOOCs) has placed a renewed focus on the development and use of computational aids for teaching and learning. In Spring 2014, a graduate course was taught at UC Berkeley to explore the use of formal methods for a range of activities in online and large-scale education, including utomatic grading, synthesizing new problems, automatically solving problems, and creating and managing virtual laboratory environments. Students performed a range of projects exploring these topics for courses in computer science, electrical engineering, and other disciplines. This technical report includes the final reports on student projects along with a summary of some of the main lessons learned through in-class discussions.
关键词:大规模开放网络课程;MOOC;计算机科学
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1655.低延迟高可靠性无线网络控制应用
[信息传输、软件和信息技术服务业] [2015-07-07]
In the near future, the number of wireless devices will outnumber humans by an order of magnitude, and most of these devices will communicate with each other instead of people. They will not only sense the environment, as most do today, but they will also manipulate it. This closed loop operation will not require the high data rates that today's people-centric networks provide; instead it will require low-latency and high-reliability communication at moderate overall data rates. Currently, high-performance industrial control is one of the few applications that has similar requirements to the IoT of the future. However, control systems exclusively use wired networks because existing wireless systems and standards cannot achieve the latency and reliability required since they are designed for either highthroughput or low-power communication between a small number of terminals.
关键词:无线设备;可靠性;通信
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1656.在混合现实物理的过滤环境照明的互动渲染
[信息传输、软件和信息技术服务业] [2015-07-07]
Physically correct rendering of environment illumination has been a long-standing challenge in interactive graphics, since Monte-Carlo ray-tracing requires thousands of rays per pixel. We propose accurate filtering of a noisy Monte-Carlo image using Fourier analysis. Our novel analysis extends previous works by showing that the shape of illumination spectra is not always a line or wedge, as in previous approximations, but rather an ellipsoid. Our primary contribution is an axis-aligned filtering scheme that preserves the frequency content of the illumination. We also propose a novel application of our technique to mixed reality scenes, in which virtual objects are inserted into a real video stream so as to become indistinguishable from the real objects.
关键词:物理环境;交互式图形;过滤
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1657.低维材料的周期势电子性质
[信息传输、软件和信息技术服务业] [2015-07-05]
In the quest for the further miniaturization of electronic devices, numerous fabrication techniques have been developed. The semiconductor industry has been able to manifest miniaturization in highly complex and ultra low-power integrated circuits and devices, transforming almost every aspect of our lives. However, we may have come very close to the end of this trend. While advanced machines and techniques may be able to overcome technological barriers, theoretical and fundamental barriers are inherent to the top-down miniaturization approach and cannot be circumvented.
关键词:电子设备;制造技术;低维材料
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1658.ADAM的可扩展的基因组重测序
[信息传输、软件和信息技术服务业] [2015-07-05]
The decreased cost of genome sequencing technologies has made genome sequencing a viable tool for clinical and populations genomics applications. The efficiency of genome sequencing has been further improved through large projects like the Human Genome Project, which have assembled reference genomes for medically/agriculturally important organisms. These reference quality assemblies have enabled the creation of genome resequencing pipelines, where the genome of a single sample is computed by computing the difference between a given sample and the reference genome for the organism.
关键词:基因组测序技术;参考基因组;基因组计划
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1659.安卓扩展远程医疗平台
[信息传输、软件和信息技术服务业] [2015-07-05]
The most preventable readmission factors - and likely the most severe - are improper administration of therapy and medication. To combat this, we are developing a lean, smartphone-based tele medical system that not only provides personal health statistics to the patient, but relays this information to the doctor allowing for a more tailored approach to medicine. By leveraging the latest open source health monitoring algorithms and libraries, we have created a reliable, low-cost and easily implementable solution that has the potential to simultaneously improve patient care and dramatically reduce healthcare expenditure.
关键词:开源健康监测算法;远程医疗平台;Android
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1660.光伏转换效率高的光学设计
[信息传输、软件和信息技术服务业] [2015-07-05]
This thesis explores ways to create highly efficient, thin-film solar cells. Both high short circuit current density and high open circuit voltage are required for high efficiency in photovoltaics. High current is achieved by absorbing most of the above bandgap photons, and then extracting the resulting electrons and holes. To achieve high absorption in thin films, surface texturing is necessary. Surface texturing allows for absorption enhancement due to total internal reflection, known as light trapping. However, in subwavelength-thick solar cells, the theory of light trapping is not understood, and both the maximum achievable absorption and the optimal surface texture are open questions. Computational electromagnetic optimization is used to find surface textures yielding an absorption enhancement of 40 times the absorption in a flat solar cell, the highest enhancement achieved in a subwavelength-thick solar cell with a realistic index of refraction. The optimization makes use of adjoint gradient methods, which allow the problem of designing a 3D surface to be computationally tractable.
关键词:太阳能电池;高吸收薄膜;梯度法;电磁优化