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Proceedings of the Winter Simulation Conference

作者： Xingyu Ren Michael C. Fu Dept. of Electrical and Computer Eng. & Institute for System Research University of Maryland College Park MD USA Dept. of Electrical and Computer Eng. & Institute for System Research University of Maryland College Park MD USA and Robert H. Smith School of Business University of Maryland College Park MD USA

ISBN: (纸本)9798331534202

We generalize the generalized likelihood ratio (GLR) method through a novel push-out Leibniz integration approach. Extending the conventional push-out likelihood ratio (LR) method, our approach allows the sample space to be parameter-dependent after the change of variables. Specifically, leveraging the Leibniz integral rule enables differentiation of the parameter-dependent sample space, resulting in a surface integral in addition to the usual LR estimator, which may necessitate additional simulation. Furthermore, our approach extends to cases where the change of variables only "locally" exists. Notably, the derived estimator includes existing GLR estimators as special cases and is applicable to a broader class of discontinuous sample performances. Moreover, the derivation is streamlined and more straightforward, and the requisite regularity conditions are easier to understand and verify.

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ms-Mamba: Multi-scale Mamba for Time-Series Forecasting

arXiv

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arXiv 2025年

作者： Karadag, Yusuf Meric Kalkan, Sinan Dino, Ipek Gursel Dept. of Computer Eng. ROMER Robotics Center Middle East Technical University Turkey Dept. of Architecture ROMER Robotics Center Middle East Technical University Turkey

The problem of Time-series Forecasting is generally addressed by recurrent, Transformer-based and the recently proposed Mamba-based architectures. However, existing architectures generally process their input at a single temporal scale, which may be sub-optimal for many tasks where information changes over multiple time scales. In this paper, we introduce a novel architecture called Multi-scale Mamba (ms-Mamba) to address this gap. ms-Mamba incorporates multiple temporal scales by using multiple Mamba blocks with different sampling rates (∆s). Our experiments on many benchmarks demonstrate that ms-Mamba outperforms state-of-the-art approaches, including the recently proposed Transformer-based and Mamba-based models. Codes and models will be made available. Copyright © 2025, The Authors. All rights reserved.

关键词： Time series

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Advanced Tutorial on Paratemporal Simulation Using Tree Expansion 24

Advanced Tutorial on Paratemporal Simulation Using Tree Expa...

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Proceedings of the Winter Simulation Conference

作者： Bernard Zeigler Christian Koertje Cole Zanni Sangwon Yoon Gerardo Dutan Dept. of Electrical and Computer Eng. University of Arizona Tucson AZ USA and RTSync Corp. Chandler AZ USA Dept. Physics University of Massachusetts Amherst Amherst MA USA Dept. of System Science and Industrial Eng. SUNY Binghamton University Binghamton NY USA

ISBN: (纸本)9798331534202

Stochastic simulations require large amounts of time to generate enough trajectories to attain statistical significance and estimate desired performance indices with satisfactory accuracy. They require search spaces with deep uncertainty arising from inadequate or incomplete information about the system and the outcomes of interest. Paratemporal methods efficiently explore these large search spaces and offer an avenue for speedup when executed in parallel. However, combinatorial explosion of branching arising from multiple choice points presents a major hurdle that must be overcome to implement such techniques. In this advanced tutorial we show how to tackle this scalability problem by applying a systems theory-based framework covering both conventional and newly developed paratemporal tree expansion algorithms for speeding up discrete event system stochastic simulations while preserving the desired accuracy.

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Metadata standard interoperability: Application in the geographic information domain

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computers, Environment and Urban systems 2004年第6期28卷 611-634页

作者： Nogueras-Iso, J. Zarazaga-Soria, F.J. Lacasta, J. Béjar, R. Muro-Medrano, P.R. Dept. of Computer Sci./System Eng. University of Zaragoza María de Luna 1 50018 Zaragoza Spain

The use of metadata expands on the opportunities for interoperability. Interoperability involves making multiple information sources access, manipulate and share data across their boundaries. Metadata descriptions from different domains are not semantically distinct but overlap and relate to each other in complex ways. As the number, size and complexity of the metadata standards grow, the task of facilitating metadata in different standards becomes more difficult and tedious. A possible solution for this problem is the creation of mechanisms that enable the translation of this information in order to make it conform to the different standards. These mechanisms are denominated "crosswalks" and the objective of this work is to present the process of "crosswalk-creation", which has been used by a research team at the University of Zaragoza in order to translate information among some of the most extended standards for geographic information metadata. © 2004 Elsevier Ltd. All rights reserved.

关键词： Interoperability

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Load settlement relationships for circular footings considering the dilatancy characteristics of sand

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Technology Reports of Kansai University 2012年第54期 119-130页

作者： Tomita, Yusuke Masui, Takeshi Nishigata, Tatsuaki Yao, Shintaro Graduate School of Engineering Kansai Univ. Japan Dept. of Architecture Faculty of Environmental and Urban Eng. Kansai Univ. Suita Osaka Japan Dept. of Civil Environmental and Applied System Eng. Faculty of Environmental and Urban Eng. Kansai Univ. Dr. Eng. Japan Kansai Univ. Dr. Eng. Japan

To elucidate the mechanical properties of load-settlement relationships for spread foundations on sand, experimental and analytical studies of the strain hardening and dilatancy of sand are needed. Here we present theoretical properties derived from experiments using a circular footing model and computer simulations. The experiments were performed by vertically loading the circular footing when resting on sand, and used the relative densities of the sand and the tank dimensions as parameters. The quantitative relationships between load and settlement were analyzed with Finite Element Method (FEM) simulations using an SMP-Cam-Clay model, which can estimate sand dilatancy. The results are summarizedas follows: with both dense and loose sand models, before reaching the ultimate load, the load-settlement relationship obtained via FEM simulation agreed with that obtained by experiment. After reaching the ultimate load, the load-settlement relationship obtained from the experiment agreed with "Terzaghi' shearing capacityline". With the medium-densesand models, some binding effect caused by the soil tank rectangle was observed, possibly due to the positive dilatancy of the sand, which steadily occurred as the settlement progressed.

关键词： Sand

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Resource partitioning for real-time processing on a multicore architecture 10

Resource partitioning for real-time processing on a multicor...

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25th Annual ACM Symposium on Applied Computing, SAC 2010

作者： Facchinetti, Tullio Foppiano, Matteo University of Pavia Dept. of Computer Eng. and System Science 27100 - Pavia Italy

ISBN: (纸本)9781605586380

This paper presents an approach to the execution of real-time applications on a multicore architecture which is based on the partitioning of computing resources among different operating systems at core level. This means that different operating systems are assigned to different cores where they run in parallel. A working implementation based on the Linux kernel and the S. Ha.R.K. real-time kernel is described. In this implementation, the Linux kernel is configured to use one core only, so that the S. Ha.R.K. real-time kernel can be started to run independently in the remaining cores. © 2010 ACM.

关键词： Software architecture

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A centralized network selection algorithm based on access router discovery in heterogeneous wireless networks

A centralized network selection algorithm based on access ro...

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6th International Conference on Wireless and Mobile Communications, ICWMC 2010

作者： Solouk, Vahid Ali, Borhanuddin Mhd. Dept. of Information Technology Eng. Urmia University of Technology Urmia Iran Dept. of Computer System and Communication Eng. Universiti Putra Malaysia Serdang Malaysia

ISBN: (纸本)9780769541822

Seamless mobility across heterogeneous wireless networks requires a certain level of Quality of Service (QoS) to be assured as it determines the packet loss and delay during handoff procedure. Selecting the target network in an appropriate time plays a crucial role towards achieving ubiquitous networks. This paper proposes a network discovery and selection method called Improved Access Router Discovery (IARD) in a heterogeneous environment comprising of WLAN and UMTS networks. In this method, the nomination of potential networks is performed in core network using a special Weighted Mean (MW) algorithm with each network ranked based on several criteria and the highest rank network is proposed as the target network. This method was tested by means of simulation under various conditions with different traffic types and was shown to result in more appropriate network selections as compared to other methods. © 2010 IEEE.

关键词： Heterogeneous networks

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Reducing the Rollback on Mobile Computing Environments 13

Reducing the Rollback on Mobile Computing Environments

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13th International Conference on computers and Their Applications, CATA 1998

作者： Chung, Kwang-Sik Hwang, Chong-Sun Yu, Heon-Chang Dept. of Computer Sci. and Eng. Korea Univ. Distributed System Lab. Korea Republic of Dept. of Computer Eng. Seo Kyeong Univ. Korea Republic of

ISBN: (纸本)9781618395443

This paper presents an asynchronous checkpointing protocol for mobile computing environments-combined with a selective sender message logging for avoiding the rollbacks. The message sending/receiving state of mobile host detemines when independently to take the local checkpoints at mobile host. And only the potential orphan message is selectively logged when a mobile host takes a checkpoint. The logs of potential orphan message prevents the mobile hosts from rolling back and is maintained on the MSS. For the recovery dependency relationship of mobile hosts is saved as Message Dependency Tree and is maintained at the MSS. The logs of potential orphan messages and MDTs are used for the consistent global state. Our protocol distributes the load of checkpointings and message loggings over MSSs and mobile hosts so that the communications between MSSs and mobile hosts are reduced and recovery is possible as though at disconnections. © 13th International Conference on computers and Their Applications 1998, CATA 1998. All rights reserved.

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Improving Java performance using hardware translation 01

Improving Java performance using hardware translation

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2001 International Conference on Supercomputing

作者： Radhakrishnan, R. Bhargava, R. John, L.K. Laboratory for Computer Architecture Dept. of Electrical/Computer Eng. University of Texas Austin TX 78712 United States

ISBN: (纸本)9781581134100

State of the art Java Virtual Machines with Just-In-Time (JIT) compilers make use of advanced compiler techniques, run-time profiling and adaptive compilation to improve performance. However, these techniques for alleviating performance bottlenecks are more effective in long running work-loads, such as server applications. Short running Java programs, or client workloads, spend a large fraction of their execution time in compilation instead of useful execution when run using JIT compilers. In short running Java programs, the benefits of runtime translation do not compensate for the overhead. We propose using hardware support to perform efficient Java translation coupled with a light-weight run time environment. The additional hardware performs the translation of Java bytecodes to native code, thus eliminating much of the overhead of software translation. A translated code buffer is used to hold the translated code, enabling reuse at the bytecode level. The proposed hardware can be used in any general pur pose processor without degrading performance of native code. The proposed technique is extremely effective for short running client workloads. A performance improvement of 2.8 times to 7.7 times over a software interpreter is achieved. When compared to a JIT compiler all SPECjvm98 benchmarks except one show a performance improvement ranging from 2.7 times to 5.0 times. A performance degradation (0.58 times) is observed for one benchmark which is long running. Allowing hardware translation to perform optimizations similar to JIT compilers and Java processors will execute long running programs more efficiently and provide speedups similar to that of client workloads.

关键词： Java programming language

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Mobility prediction modeling and analysis for people in mobile wireless network

Mobility prediction modeling and analysis for people in mobi...

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International Conference on Ubiquitous Information Technologies and Applications

作者： Jeong, Taikyeong Han, Seungchul Song, Yongseok Rhee, Seung Hyong Park, Gyungleen Dept. of Electronic Eng. Myongji University Korea Republic of Dept. of System Eng. Dankook University Korea Republic of Dept. of Electronics Convergence Eng. Kwangwoon University Korea Republic of Dept. of Computer Statistics Cheju National University Korea Republic of

ISBN: (纸本)9781424488124

This paper presents the prediction and analysis of a mobility model of people, in short mobility prediction for the mobile wireless network architecture as the essential part of future wireless market trends. To show a mobile connectivity and wireless connection in wireless mesh-network, we utilized urban mobility simulation time with prediction method, and also investigated a large number of mobility flows. We also highlight how to achieve high efficiency by using the neural prediction methods and modeling directly to the mobile wireless network architecture by a software tool and library. Major results of our experimental study demonstrate good scalability and usability of our prediction of mobility model by using a statistical comparison results, and trend of mobility usages. ©2010 IEEE.

关键词： Forecasting

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