Filters








20,814 Hits in 7.0 sec

Page 810 of The Journal of the Operational Research Society Vol. 50, Issue 8 [page]

1999 The Journal of the Operational Research Society  
In view of these facts, much time and effort seem to be wasted to solve the decomposed subproblems indepen-  ...  Inevitably, lot sizes deter- mined in a higher level of planning affect the solution to the loading problem and an a-priori decision to solve the lot sizing problem first is not justified unless the trade-offs  ... 

Hybrid Heuristics for the Multi-Stage Capacitated Lot Sizing and Loading Problem

L. Ozdamar, G. Barbarosoglu
1999 Journal of the Operational Research Society  
In view of these facts, much time and effort seem to be wasted to solve the decomposed subproblems indepen-  ...  Inevitably, lot sizes deter- mined in a higher level of planning affect the solution to the loading problem and an a-priori decision to solve the lot sizing problem first is not justified unless the trade-offs  ... 
doi:10.2307/3010340 fatcat:lbkt3l3ienfqzompjff2zvnbty

A multi-core high performance computing framework for distribution power flow

Tao Cui, Franz Franchetti
2011 2011 North American Power Symposium  
There is an enormous growth in performance capability of computing platform in the last decade. The parallelism becomes an inevitable trend for future computing hardware / software design.  ...  That is 50x speedup comparing to an already fully compiler-optimized C++ implementation.  ...  than 99% of the designed computation capability of CPU hardware is wasted for this particular numerical application.  ... 
doi:10.1109/naps.2011.6024883 fatcat:py6cjgma2zgyxmubzeepdb7hmi

Waste Management in the Context of Sustainable Development: Case Study in Romania

Monica Izvercian, Larisa Ivascu
2015 Procedia Economics and Finance  
Optimization of waste collection through source separation is mandatory, while the management based on waste land filling must be overcome.  ...  So, waste management is a sensitive area for organizations. The present paper presents the situation of municipal solid waste management (MSW) in Romania, relative to EU requirements.  ...  The rest of the institutions practice a more frequent collection (twice a day or during every break time).  ... 
doi:10.1016/s2212-5671(15)00825-4 fatcat:4pgdtpdik5ap3g7pcchniogl3q

Autonomic Parallelism and Thread Mapping Control on Software Transactional Memory

Naweiluo Zhou, Gwenael Delaval, Bogdan Robu, Eric Rutten, Jean-Francois Mehaut
2016 2016 IEEE International Conference on Autonomic Computing (ICAC)  
Parallel programs need to manage the trade-off between the time spent in synchronization and computation. The time trade-off is affected by the number of active threads significantly.  ...  However, there is no universal rule to decide the parallelism and the thread locality for a program from an offline view. Furthermore, an offline tuning is error-prone.  ...  The time spent in wasted work is the synchronization time in the STM view. Apart from diminishing wasted work, one way to improve STM system performance is to trim computing time.  ... 
doi:10.1109/icac.2016.54 dblp:conf/icac/ZhouDRRM16 fatcat:dpzirswqorafxgnhwp3dfw6od4

Preparation of Deuterium Labeled Compounds by Pd/C-Al-D2O Facilitated Selective H-D Exchange Reactions

Anne Kokel, Dora Kadish, Béla Török
2022 Molecules  
The chemo/regioselective H-D exchange of amino acids and synthetic building blocks by an environmentally benign Pd/C-Al-D2O catalytic system is described.  ...  D2 gas is generated in situ from the reaction of aluminum and D2O, while the commercially available palladium catalyst assists the H-D exchange reaction.  ...  Acknowledgments: Support of our work by the University of Massachusetts Boston is gratefully acknowledged. Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/molecules27030614 pmid:35163883 pmcid:PMC8840159 fatcat:5gggagp3ljfavobvwyftbdwgyq

99 Fix it [article]

Konstantin Mishchenko and Filip Hanzely and Peter Richtárik
2019 arXiv   pre-print
As an illustration, this means that when n=100 parallel workers are used, the communication of 99% blocks is redundant, and hence a waste of time.  ...  Many popular distributed optimization methods for training machine learning models fit the following template: a local gradient estimate is computed independently by each worker, then communicated to a  ...  of Parallel Optimization is Inevitably a Waste of Time which coincides with what we wanted to prove for x t+1 i .  ... 
arXiv:1901.09437v2 fatcat:up2xhbyfojhgndvomvuhq3qxd4

Enhancing Cloud-Based Servers by GPU/CPU Virtualization Management [chapter]

Tin-Yu Wu, Wei-Tsong Lee, Chien-Yu Duan, Tain-Wen Suen
2013 Smart Innovation, Systems and Technologies  
Furthermore, for groups of virtual servers, many tasks actually can be completed by CPUs without the support of GPUs. Thus, it is a waste of resources to implement GPUs to all physical servers.  ...  In no matter quantum mechanics, astronomy, fluid mechanics, or atmospheric simulation and prediction, a GPU suits not only parallel multithreaded computing for its tens of times performance than a CPU,  ...  , GPU virtualization is inevitable.  ... 
doi:10.1007/978-3-642-35473-1_20 fatcat:4r2mt3n7y5eqdidh4mhowv4oqq

Control of autonomic parallelism adaptation on software transactional memory

Naweiluo Zhou, Gwenael Delaval, Bogdan Robu, Eric Rutten, Jean-Francois Mehaut
2016 2016 International Conference on High Performance Computing & Simulation (HPCS)  
A high parallelism may decrease computing time while increase synchronization cost among threads. A way to improve program performance is to adjust parallelism to balance conflicts among threads.  ...  We propose to design feedback control loops to automate the choice of parallelism level at runtime to diminish program execution time.  ...  The time spent in wasted work is the synchronization time in a STM view. Apart from diminishing wasted work, one way to improve STM system performance is to trim computation time.  ... 
doi:10.1109/hpcsim.2016.7568333 dblp:conf/ieeehpcs/ZhouDRRM16 fatcat:retnhwea6fc5jdqztd7udpjypq

Landfill evolution and treatability assessment of high‐strength leachate from msw with high organic and moisture content

Mutasem El-Fadel, Elie Bou-Zeid, Walid Chahine
2003 International Journal of Environmental Studies  
The generation of contaminated leachate remains an inevitable consequence of the practice of solid waste disposal in landfills.  ...  Leachate treatment is highly dependent on the quality of leachate, which in turn is influenced by various factors including waste composition and operational procedures.  ...  Special thanks are extended to the US Agency for International Development for its continuous support to the Environmental Engineering and Science programmes at the American University of Beirut.  ... 
doi:10.1080/0020723032000069187 fatcat:2rhgopmlofdg5my2rzabgmgutm

Wastewater treatment by nanofiltration membranes

R Mulyanti, H Susanto
2018 IOP Conference Series: Earth and Environment  
In addition, fouling as a severe problem during NF application is also presented. Further, future prospects and challenges of NF for wastewater treatments are explained.  ...  NF has become a promising technology not only for treating wastewater but also for reusing water from wastewater. This paper presents various application of NF for wastewater treatments.  ...  Wastewater Reuse Waste as a result of human activity is a challenge and has great potential to be reused for various needs.  ... 
doi:10.1088/1755-1315/142/1/012017 fatcat:yumsm27yy5cxtjokawnbwd6xym

A Search for Regulatory Analogs to Carbon Sequestration [chapter]

D REINER, H HERZOG
2003 Greenhouse Gas Control Technologies - 6th International Conference  
While the possibility of exposure leading to damages to public health, workers or the environment may be small, it seems inevitable that if there is to be widespread adoption of sequestration, then a regulatory  ...  To better understand the drivers of a future regulatory system, the historical evolution of comparable regulatory regimes provides a useful guide.  ...  Perhaps the most extensive information sharing is in high-level nuclear waste because of parallel struggles and concerns over proliferation.  ... 
doi:10.1016/b978-008044276-1/50038-6 fatcat:ot3h5kc2mbdthdoenpvtsqukeu

Landfill Liner Failure: an Open Question for Landfill Risk Analysis

Alberto Pivato
2011 Journal of Environmental Protection  
A probabilistic approach, which is usually performed for complex technological systems such as nuclear reactors, chemical plants and spacecrafts, can be applied usefully to the evaluation of landfill liner  ...  The European Union Landfill regulations (1999/31/EC) are based on the premise that technological barrier systems can fully contain all landfill leachate produced during waste degradation, and thus provide  ...  Municipal Solid Waste = MSW; Inert Waste = IW. LANDFILL VOLUME ESTIMATED FAILURE TIME  ... 
doi:10.4236/jep.2011.23032 fatcat:jbgpclxlrvfs3dkajyb5acj454

Minimizing Solid Waste Collection Routes Using Ant Colony Algorithm: A Case Study in Gaziantep District

Serap Ulusam Seçkiner, Amanuel Shumye, Sena Geçer
2021 Journal of Transportation and Logistics  
This paper proposes an ant colony optimization algorithm for a capacitated vehicle routing problem to determine the shortest waste collection and transportation route covered by a waste collection truck  ...  The results of the proposed ant colony optimization algorithm showed that our model yields a 28% reduction in the total daily traveled distances and energy savings against existing consumption.  ...  Conflict of Interest: The authors have no conflict of interest to declare. Grant Support: The authors declared that this study has received no financial support.  ... 
doi:10.26650/jtl.2021.894265 fatcat:mmyfjmyexve4nida6lex4tuque

Solid Waste Management in Petroleum Refineries

Jadea S. Alshammari, Fatma K. Gad, Ahmed A.M. Elgibaly, Abdul Rehman Khan
2008 American Journal of Environmental Sciences  
A multi-objective optimization model based on the goal programming approach was applied for proper management of solid waste generated by the petroleum industries in the state of Kuwait.  ...  Material recycling exhibited huge indirect benefits in an economic sense, although the emphasis of environmental quality as one of the objectives in decisionmaking has been inevitably driven the optimal  ...  [4] for the study of a regional system over a single time period.  ... 
doi:10.3844/ajessp.2008.353.361 fatcat:o56ofbt6tfetjershliptqyju4
« Previous Showing results 1 — 15 out of 20,814 results