In this paper, we demonstrate a new dataflow platform of DFC, which can handle the successive dataflow computing passes with tagged data. By implementing the matrix multiplication in DFC, we show that DFC can exploit ...
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ISBN:
(数字)9781728126166
ISBN:
(纸本)9781728126173
In this paper, we demonstrate a new dataflow platform of DFC, which can handle the successive dataflow computing passes with tagged data. By implementing the matrix multiplication in DFC, we show that DFC can exploit the parallelism automatically with a much simple dataflow graph constructed by DF functions of DFC. Different from the other dataflow execution platform, DFC support multiple worker threads for one dataflow node of DF functions. By running the matrix multiplication program of DFC on Kunlun system, it was verified that DFC get a reasonable speedup for large scale computing for thread number up to 512.
HPC system usually uses a shared filesystem like Lustre as temporary file storage like scratch directory. It needs automated purge process to remove unused files for maintaining optimal performance of the shared files...
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ISBN:
(纸本)9789811076053;9789811076046
HPC system usually uses a shared filesystem like Lustre as temporary file storage like scratch directory. It needs automated purge process to remove unused files for maintaining optimal performance of the shared filesystem. However, the purge process in large capacity file system takes much time to search and remove target files. In this paper, accelerated purge processes using MPI are proposed. First, master/slave parallel purge (MSPP) process is the method that master node distributes purge tasks among slave nodes. Second, evenly distributed purge (EDPP) process is the method that all node are involved in purge process that improves load balancing. Experimental results show that the purging time of proposed EDPP method for 1958 GB scratch data has been reduced by 4.04 and 2.47 times, respectively, when it is compared withthe results of single node purge (SNP) and MSPP methods.
In order to improve the location accuracy of DV-Hop algorithm, an improved algorithm based on iterative computation and two communication ranges was proposed. this algorithm first selects a suitable communication radi...
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ISBN:
(数字)9781728126166
ISBN:
(纸本)9781728126173
In order to improve the location accuracy of DV-Hop algorithm, an improved algorithm based on iterative computation and two communication ranges was proposed. this algorithm first selects a suitable communication radius for the current network topology and then uses it to estimate the average per hop distance of beacon nodes withthe default communication radius of the node. Finally, an iterative algorithm was used to revise the average per hop distance obtained in the previous step so as to select the minimum average per hop distance to calculate the distance between the unknown nodes and beacon nodes. the simulation result indicates that the improved algorithm can greatly improve the location accuracy without obviously increasing algorithm complexity and communication traffic.
A commonplace issue with portable technology is battery efficiency. While many industries are trying their best to improve battery life without sacrificing a products quality and efficiency, we believe that further ca...
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A commonplace issue with portable technology is battery efficiency. While many industries are trying their best to improve battery life without sacrificing a products quality and efficiency, we believe that further can be done to improve battery consumption on ones mobile devicefrom tablets to smartphones to laptops to everything else. Many applications on these devices are based on a micro service architecture. In this article, we introduce a new algorithm KaliGreen that can maneuver the microservices within a network of devices in order to maximize the run-time of a microservice-based application;moreover, KaliGreen allows a 54% increase in the average run-time of an application by shifting microservices from 6 devices (as example) with low battery or inefficient processing ratios to devices in better conditions. To achieve this, KaliGreen utilizes KaliMucho middleware, which is able manipulate microservices in run-time. this algorithm provides a plausible solution to maximizing energy consumption within a network of devices. (C) 2018 the Authors. Published by Elsevier Ltd.
this paper proposes a high-speed MSB first multiplier which works efficiently when successive inputs show gradual change which is usually the case for analog signals sampled at a high rate. When the speed of execution...
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ISBN:
(纸本)9781538644300
this paper proposes a high-speed MSB first multiplier which works efficiently when successive inputs show gradual change which is usually the case for analog signals sampled at a high rate. When the speed of execution of various processes in digital signal processing units is considered, the easiest way to improve it is to use efficient and fast multiplier units. the proposed multiplier computes only one or two partial products when the successive inputs are similar as compared to eleven partial products in the conventional multiplier. the output truncation length can be controlled depending upon the application. the no. of clock cycles needed for multiplication in a conventional MSB first multiplier and the proposed highspeed multiplier are compared through FPGA Implementation. An average decrease of 14.7% in no. of clock cycles is observed when simulations are done for 1400 ECG ambulatory recordings from MIT BIH Arhythmia Database.
In the past 20 years, there have been a lot of distributedcomputingtechnologies, such as middleware technology, grid technology, mobile agent technology, P2 P technology and recently introduced Web Service technolog...
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In the past 20 years, there have been a lot of distributedcomputingtechnologies, such as middleware technology, grid technology, mobile agent technology, P2 P technology and recently introduced Web Service technology. Each technology has been recognized to a certain extent, solving the problem of distributedcomputing in a specific range. But there are some unsolved problems in the existing distributedcomputing technology, which affect the application and popularization of the distributedcomputing technology. the integration of a variety of distributedcomputingtechnologies to meet the needs of distributedcomputing is the research direction in the future. It is also the key to the smooth development of distributedcomputing.
Location based services (LBS) can be separated into a number of layers: technology layer, application layer, standard layer, and social-ethical layer. this paper presents an ontology development at standard layer. We ...
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ISBN:
(数字)9781728126166
ISBN:
(纸本)9781728126173
Location based services (LBS) can be separated into a number of layers: technology layer, application layer, standard layer, and social-ethical layer. this paper presents an ontology development at standard layer. We developed an ontology to identify and classify indoor semantic information to guide the development of LBS applications for multi-level building navigation. this ontology proposed models of multilevel building properties as classes of building, level, zone, link, node, and coordinate. To apply this ontology, we develop an indoor navigation algorithm using the ontology classes and Dijkstra's algorithm for shortest path in user navigation. A prototype and experiments are implemented to validate this ontology.
In this work, we consider heuristic algorithms for parallel jobs execution and efficient resources allocation in heterogeneous computing environments. Existing modern job-flow execution features and realities impose m...
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ISBN:
(数字)9781728126166
ISBN:
(纸本)9781728126173
In this work, we consider heuristic algorithms for parallel jobs execution and efficient resources allocation in heterogeneous computing environments. Existing modern job-flow execution features and realities impose many restrictions for the resources allocation procedures. Emerging virtual organizations and incorporated economic scheduling models allow users and resource owners to compete for suitable allocations based on market principles and fair scheduling policies. Subject to these features a special dynamic programming scheme is proposed to select resources depending on how they fit a particular job execution duration. Hindsight approach makes it possible to select between several different scenarios obtained withthe same base scheduling procedure. Based on a conservative backfilling scheduling procedure we study how different resources allocation heuristics affect integral job-flow scheduling characteristics in a dedicated simulation environment.
the sequence alignment is an important basic work in analyzing large biological data. For the massive short reads alignment problem, based on the dynamic programming approach, divide and conquer principle, and FUSE ke...
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ISBN:
(数字)9781728126166
ISBN:
(纸本)9781728126173
the sequence alignment is an important basic work in analyzing large biological data. For the massive short reads alignment problem, based on the dynamic programming approach, divide and conquer principle, and FUSE kernel module, a parallel short-read alignment method allowing the optimal number of inserting gaps depending on species and sequence length is developed on multi-core cluster. the experimental results on real and synthetic data show that the proposed parallel alignment method can achieve good speedup withthe same alignment accuracy as the sequential alignment method. Compared withthe existing parallel alignment method, the proposed method can remarkably reduce the time of partitioning reference genome and reads files and accelerate the large-scale short-read alignment.
Withthe advent and proliferation of post-PC era devices (ex: smartphones and tablets), the desktop printing is beginning to decline. However, withthe proliferation of the mobile devices, and acceptance of the BYOD c...
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ISBN:
(纸本)9781538644300
Withthe advent and proliferation of post-PC era devices (ex: smartphones and tablets), the desktop printing is beginning to decline. However, withthe proliferation of the mobile devices, and acceptance of the BYOD concept in the enterprises, employees want to print from anywhere, anytime and using any device. And, enterprises want to ensure security in the printing while enabling anytime, anywhere print access. this need in the market has prompted us to create Internet Gateway (IG) to provide secure location independent connectivity as a service, without MDM (Mobile Device Management) or VPN (Virtual Private Network). We have proposed IG as a connectivity service, for providing mobility to the services hosted in the cloud. We believe that this innovation would help in turnaround by saving the huge costs being spent on MDMs (more than 20,000 USD for each MDM instance), and as well provide a value to customers for printing from anywhere, anytime.
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