- Roumen Nedev added an answer:3Which one is best for multi objective function for optimal placement of capacitor, Weighting function or Pareto?
I want to solve optimal placement of capacitor for distribution system. So I want a good multi objective function for it.
Pareto gives the whole picture of the optimization, when the approximation is estimated after several intents, some of which give the optimal solution to one of the objective functions.Following
- Jesús Rodríguez-Molina asked a question:NewDoes anybody know about Q1 journals regarding ICT, distributed systems and/or the Smart Grid with short timespan for reviewing and publishing?
Does anybody know about Q1 journals regarding ICT, distributed systems and/or the Smart Grid with short timespan for reviewing and publishing? By "short" I basically mean with a reviewing period of around 30 days before receiving an answer. Has anyone had good experiences regarding some specific journal or editorial about this topic?Following
- Aleksandar Sokolovski added an answer:5What is the best framework to use when researching on the effects of Botnets in Distributed Systems?
methodologies to use when researching about effects of botnets in distributed systems
Yes I agree it depends on the end goal of the research, but for example the DARPA dataset 1999 or a.k.a KDDCUP dataset 99 (another version of the DARPA dataset) is also recognised in data mining as one of the more important datasets, hence used in the KDDCUP for data mining. I believe there are newer KDDCUP datasets 2010.
I my experience with datasets as data scientist is good to use real world data, not only simulators because the simulators only simulate the real issue, they are not the real deal. I used OpNet for one research for my master thesis anomaly detection in computer networks, with the simulated data the alg. worked perfectly, but the real world data created few addition challenges, not preset in the simulated datasets.
- Sridhar Seshadri added an answer:6Is SimGrid a good software for teaching distributed systems to computer science students?
I'm wondering whether someone has any experience on teaching distributed systems using the simulator SimGrid (http://simgrid.gforge.inria.fr/)... Any help or comment will be welcomed!
Yes you can use it as one of the good tools available....Following
- Rabbi Al Mamun added an answer:5How many ways of dynamic voltage restorer like "Series active filter"? and which one is highly efficient for distribution system?
I want to know about power quality improvement systems and parameters to improve. Which methods are practically using and highly efficient worldwide? I am trying to simulate such a model in Simulink
Thank you so much :) @ Mohamed Mousa BroFollowing
- Hai N. Nguyen added an answer:6Which simulation tool can simulate video streaming in P2P network?I'm trying to simulate p2p video streaming to evaluate the scalability of a network
There are various open source projects for video streaming over P2P network. For example, qsopcast: http://sourceforge.net/projects/qsopcast/ or peerstreamer: http://peerstreamer.org/Following
- Kamil Saib added an answer:11How can I validate the architecture for internet of things (IoT)?
I am exploring some research ideas about architecture for IoT. At present I am come up to a naive idea for IoT architecture, but I am not clear about how to validate the naive architecture for IoT.
Can anyone guide me in this regards, how to validate the architecture for IoT? what tool to be use? or any other guide line?
Thanks in advance
That largely depend on the protocol and communication infrastructure (m2m, m2c, m2edge).. Next that need to precise part of the question is.. What need to be validated. It's perfectly possible to simulate the data and validate each component separately or build a 'slimmed' proof of concept to validate performance of your architecture, data loss, security, reliability, with scalability in mind. You also need to validate robustness to temporary loss of connection,sensor failure.Following
- Augusto Ciuffoletti added an answer:6Can anyone give me a more insight on "Evaluation of distribution system reliability using probabilistic techniques"?
I am currently starting my new research on Distribution system reliability assessment using probabilistic approaches. Can anyone suggest me good publications, books or any useful information regarding the same.
Thanks in advance..!
I'm not sure, but I'd rephrase your topic into "Evaluation of *the reliability of distributed systems* using probabilistic techniques". Does this reflect your problem?
Anyway, I agree with Peter that the topic is too broad. Do you want probabilistic estimates of failures, of the kind of "mean time between failures" (keyword MTBF)? Or how frequently the system will converge and stabilize after a certain time (keyword self-stabilization). These are completely different topics (with a huge bibliography behind) that fit into your question. An there are others...Following
- Rajeev Dwivedi, Ph.D. added an answer:2Customer perception on E-commerce industry and its distributions systems?
customer perception on E-commerce industry and its distributions systems: in the Indian context?
You can classified the customer in this context. The old age customer who prefer to see and feel, a moderate customer who uses both mode of shopping and third IT generation customer who uses mobile to do any wonder. Since competition is intense in indian e-commerce industry, the distribution systems are streamlined at greater extent but still challenges for new players.Following
- Jitendra Bhadoriya added an answer:3Which pso method will be efficient for optimization of weak bus in distribution systems?
Thanks for your valuable answersFollowing
- Vahid Maleki Raee added an answer:1What are the effects of unbalanced loading in transformers on distribution systems ?
three phase distribution systems
1- On a distributed system, once the load increases on a single link, for sure the processing time will increase. As a result, there will be some delay in communication, that means the other components must wait a bit longer for a particular node/component to process its job. So, the first effect would be the Delay.
2- By the time that load increases on a link, that means the traffic increases, the traffic increases, more bandwidth being utilized on a particular link and there could be a link failure. There is always a threshold that a link can handle, if the threshold hit, the link goes down. And if the link goes down, the job won't be processed. Therefore. the whole system won't work as a result of a component affects the result of the other nodes in a distributed system.
Hope that can answer your question if I've understood your question correctly.Following
- Samuel Tesema Lakew added an answer:6How integration of PV system in a conventional distribution system is possible?
PV system and distribution system are easily modeled in MATLAB simulation but how can we integrate them and what are the useful control strategies to make system balance and how it affects local distribution grid.
Once you have the out put from PV, you may have an inverter for your AC loads that is tied to the AC bus and if you have any spare enrgy, the DC power from the DC bus will flow to the distribution grid through grid tied inverter (which synchronizes the PV power to the grid in magnitude and direction) and energy meter in case you need power from the grid in time of solar irradiation fluctuation. Concerning the effect on the grid distribution system, there is power quality problem the PV system causes due to its switching devices.Following
- Witold Orlik added an answer:4What is the metric to measure data consistency?
Do you know any metric to measure data consistency in a distributed system?
You are most welcome, so glad I could help
- Qi Su asked a question:OpenCan anyone suggest some recent papers regarding deployment of content servers for CDN?
Can anyone suggest some recent papers regarding deployment of content servers for CDN?Following
- Sunkara veerababu Viresh asked a question:OpenWhat is right way of Node selection in Radial distribution system?
What is right way of Node selection in Radial distribution system?Following
- Mayank Maheshwari added an answer:2Does anyone know about power loss calculation in distribution network?
How come the real power loss for the radial distribution system can be calculated from this formula?
Can anyone tell me the derivation?
See the below paper it may help in your question.
- Cong Liu added an answer:7Are there any references regarding calculating concurrent transitions from an arbitrary Petri net?
I mean an approach to find all concurrent transitions directly from a Petri net structure.
Thanks Djamel, I will read them later.Following
- Mariusz Janiak added an answer:12What are open-source frameworks implementing publish–subscribe approach over IP/UDP, dedicated for small embedded systems?There is a commercial available implementation of RTPS protocol, a RTI Connext Micro, which is well scalable for small embedded systems with microcontroler. There is also open-source project ORTE (http://orte.sourceforge.net) that implement a RTPS protocol, but I haven't found its port for microcontroler based systems.
We are basing on the standard Ethernet hardware that is available in PCs and microcontrollers. On the MAC level, the RTnet implements software TDMA discipline -- Time Division Multiple Access so the arbitration problem has been already solved. What we looking for now is a midlleware protocol that implements the pub/sub paradigm, and is able to operate over the UDP/IP. Our PCs has 1GB NICs but microcontrollers has only 100MB. Most of our system typically operate with 1ms period so latency should be no more then the tens of us.Following
- Akhilesh Mathur added an answer:2What will be the basic criterion for designing a "Fault current limiter" in distribution system?
If I want to place a fault current limiter (FCL) in the distribution system, then how can I choose a size of FCL or design it and how can I found exact location where I can locate it in the system...
Thank you Dear Nikolay Raychev for this useful link....Following
- Dražen Tubić added an answer:3How can I implement DG in matpower to calculate power flow, MATLAB?
I need to implement randomly generated DG (size and location are random) into distribution system. For example, if i want to implement DG in bus 4 and with the size of 1 MW, what do i need to do to succefsully perform power flow after that? I tried to do that with matpower case14 system, in which generators are by default on buses 1,2,3,6 and 8. I created new row in generator information (mpc.gen) and provided all information needed (real power output, bus number, voltage magnitude) and when i do power flow i get all kinds of errors. I even tried to set bus 4 as PV, and that didn't help. What am i doing wrong and how can i do that? I am using matpower 4.1
Thank you J.Vara, i decided to go with Muhammad's solution, subtracting the DG value from loads (their real power demand), which is very simple and gives the same results.Following
- Naoufel Boulila added an answer:4Is there any survey or literature review paper which describes the transformation of embedded systems to Cyber-Physical Systems?
I am currently studying the relationship between the cyber-physical systems and its predecessor, embedded systems. I am look for survey papers, literature reviews and classical references.
I am giving special concentration to the security aspects.
i think this book is the right one:
Embedded System Design: Embedded Systems Foundations of Cyber-Physical
there is a publication or slides about it here on Researchgate: http://www.researchgate.net/publication/234125635Following
- Hemakumar Reddy Galiveeti added an answer:1Can someone provide me with the technical data sheet of the RBTS bus system?
Can someone furnish me with the technical data sheet of the RBTS bus 1, bus 2, bus 3, bus 4, bus 5 and bus 6 transformers i.e Transformers; impedance, ratio etc. I need the data to estimate distribution system technical losses.
You can get transformer impedance values from manufactures name plate details.
Ratio depends on the primary and secondary voltage and transformer tap changing ratio depends on the system operation.Following
- M. Hamiz added an answer:4Which DBMS support distributed databases more as compared to competitors?Distributed Databases are one of the major requirement of the industry now a days. So would you share your knowledge about those DBMS which support the maximum functionality and requirement of Distributed Database.
True. Put the fragmentation or replication to the highest demand siteFollowing
- Sureshkumar Sudabattula added an answer:1How the DG penetration plays an important role in distribution system?
i am searching so many papers in this area some the researchers simply taken an assumption of 100% penetration and adding an distributed generation sources and minimizes the power losses to a very small value but how it influences the existing distribution network they didn't considering. finally my doubt is what is the maximum percentage of DGs should be connected to already existing distribution network?
i am expecting that maximum of 50% is taken from distributed energy sources that is only capable for already existing distribution network and also consider the cost these sources taken into account.Following
- Holm Xie added an answer:4Any tool suggestion for visualizing a geographical data distribution of distributed system?
I would like to visualize the geographical data distribution of a distributed storage system. Can someone suggest me a tool which does this?
You can try R or Python. They both have plenty package to interworking with map.
Please check the textbook: Data Driven Security, Analysis, Visualization and Dashboards, Wiley 2014, Jay Jacobs and Bob RudisFollowing
- Morteza Seddighighachkanloo added an answer:4How can I performance a load scaling in PSSe?
How can I performance a load scaling in PSSe?
- Closed account added an answer:4Any advice on the number of data for big data?
hi guys, i am working on dataset with 1M user and 943,347 item , but i want to consider less than, for example 10,000. my platform is weka. my reason is that ram of laptop can not process on 1M. i need a strong reason that why i consider less of data?
My work is not on big data. i want to know this number (1M) is big data, or need parallel systems or distributed systems? thanks
Big Data not necessarily mean huge volume of data, if you have varied data <variety> , and rate at which you get those data is also a criteria<Velocity>.
Well if you want to process 1 million data, you can still do that using virtual cluster offered by Hadoop for which your notebook would be suffice.Following
- John Frederick Chionglo added an answer:11How can I create a Petri net simulator?
I would like to make a simulation of a particular Petri net.
Is there someone that can help me with some ideas or principles on this?
Thank you in advance!
Some Principles and Ideas
Consider “making a simulation of a petri net” to be the same as “writing a computer program using petri nets”. To use petri nets for writing a computer program is to organize a computer program using Petri Net elements and annotations. To create this organization, first establish the relations of computations in terms of places, transitions, inputs and outputs. Second create annotations of places, transitions, inputs and outputs for the computations.
Consider making a simulation of a countdown timer. The countdown timer begins from a specified value (say, 10). Using some interval, the timer value decreases by one. When the timer value reaches zero, the countdown ends.
This computation may be modeled in terms of a place, an input and a transition. The place has a mark annotation, a value that represents the timer value – the place is the timer. The input has a “fire” annotation, a computation that deducts one from the input place mark annotation. The input also has a status annotation, a ‘true’ value means the computation may proceed and a ‘false’ value means that the computation should not proceed. The input has an “is enabled” annotation, a computation that determines the value of the status annotation – in this case, if the mark annotation of the input place is greater than zero, the status annotation of the input is ‘true’ and ‘false’ otherwise. The transition has “fire” annotation, a computation that delegates the “fire” computation by “firing” its input. The transition has an annotation status, a true value means that the value of its input status annotation is ‘true’ and ‘false’ otherwise. Consider too visual annotations of the net elements: a circle for the place, a square for the transition and an arrow from the circle to the square for the transition, and dots for the mark annotations of places – empty for 0 mark, one black dot for 1 mark, two black dots for 2 marks, etc. [The types of annotations considered so far are those found on Place/Transition nets, a kind of Petri Net.]
To make the “simulation” interactive, consider an event annotation for the transition, a computation that delegates a user event (such as a mouse up event) to “fire” the transition. Furthermore, consider a visual annotation for the status of the transition – green if the status annotation is true and empty otherwise.
For petri nets with many net elements and annotations, several other issues (such as naming conventions, high-level graphics conventions, and software engineering workflow processes) must be addressed. Here is a research paper related to this topic – Net Elements and Annotations: Computations and Interactions in PDF. [See link attached to this reply].Following
- Arundhati Sahoo added an answer:1How can we decide the rating of DVR placed in a distribution system for voltage sag mitigation?
What may be approximate cost of DVR?
the simulation of a DVR is done using MATLAB/SIMULINK software. Thus it became
easier to construct the large distribution network and analyse the various result for two different types of faults.
The controlling of DVR is done with the help of PI controller. The simulation results clearly showed the
performance of the DVR in mitigating the voltage sag due to different fault conditions in distribution systems.
DVR is one of the fast and effective custom power devices. DVR has shown the efficiency and effectiveness on
voltage sag compensation hence it makes DVR to be an interesting power quality improvement Device. This has
been proved through simulation and hardware implementation. From the analysis it is found that in case of a
three phase fault almost 91% of compensation is done and in line to line fault voltage compensation took place
for almost 44%.Following
- Eduard Babulak added an answer:1Are there Petri Net diagrams worth adding "new lives"?
I am limiting the number of Petri Nets to a maximum of two per year.
Question 1: Which Petri Net diagrams should I include? Why should I include them?
Once I have finalized the list of Petri Net diagrams to revive, I am hoping to finish the work as soon as possible. So before I begin, I will be looking for volunteers who are interested in adding “new lives” to the Petri Net diagrams. I will create at least two token game versions. Thus I will be looking for a maximum of 102 volunteers – one person per token game version. If there are less than 102, I will create the difference.
Question 2: Would you be interested in helping out? If so, please give me a shout.
Subject to your case scenario and system dynamics the embedded Petri Net System may be relevant.
About Distributed Systems
Distributed computing is a field of computer science that studies distributed systems. A distributed system consists of multiple autonomous computers that communicate through a computer network. The computers interact with each other in order to achieve a common goal. A computer program that runs in a distributed system is called a distributed program, and distributed programming is the process of writing such programs.