Since intop1 is the inner operator, what gets evaluated is (intop1(T)-intop2(T))^2, which clearly is not the L2 norm of the difference. You can then disable the Temperature node for that specific study step. Thank you. second. if you try to join both with all solutions it just gives out an error case when there is more than one. Returns the one based indices available for a given level. The two operators can be used directly later in the plot, integration, average, or other settings. I tried to go through the steps and I failed to get the model to run. treated as level-tuples. Thanks for the feedback. Heres how to accomplish such tasks using COMSOL Multiphysics. These plots use data sets with applied selections. The figures below show how the difference of the integrals and the integral of the difference are evaluated on an explicitly joined data set Join 3. specified by one-based solnums. In the second case, the temperature is flipped, going from 400 K at the left end to 300 K at the right end. My main question is that how can i see the effect of piles temperature (which changes sinusoidally, see Fig. Comsol Connect (CX) is South Africa's preeminent point-to-multipoint licensed wireless, Layer 2, open access network that is MEF 2.0 compliant. Extract solution data from COMSOL model A. Retrieves the imaginary part of the parameter values for the So I have to make a join of first pair of sets, choosing manually two of 2000 modes. The difference in effective stresses is close to zero, evaluated using a Join data set. You have a couple of options here. of all parameter values associated with outersolnum 2 and innersolnum innersolnum, but can vary for so called multi-solutions In the Join settings window, you need to make two choices: which solutions to combine and how to combine them. levels.length==0, an error will be given if level is such that the The study steps for a combined solution and a reference solution with only heating. Note that while COMSOL employees may participate in the discussion forum, . there are no structured data to return (currently level==0 and Another option is to first join two data sets and then joined that joined data set with a third solution. When Comsol's existing network is unable to serve your needs in outer-lying environments, our CX Specific offering is a bespoke end-to-end network dedicated to your needs. (outersolnum,innersolnum). The construction data1(data1(data2(with(n,u)))) also does not look time-optimized. Of course, whatever can be done with the General method can also be done with the Explicit method by building the expression later at the point of use. Suppose we enter (data1-data2)^2 in the Expression field in the Join settings window and named the new data set Join 1. As pointed out above, when using the General method we also get an operator. Retrieves parameter names for the parameters associated with the Discussion Closed This discussion was created more than 6 months ago and has been closed. the inner and the second the outer solnums. In summary, the order of operators in a composition operation is as follows: functions or coupling operators added in the Definitions node; the operator created by Join; and predefined average, maximum, minimum, and integration operators available in Results > Derived Values, from inside to outside. Large-scale renewable energy photovoltaic (PV) power plants feed electricity directly into the grid or grid island. is there any tutorial available for multiple steps and solution management? Returns the SolverSequence associated with the given one-based Reference error: a zero array is returned. Returned solution is not converged, App: Improving the Payload Capacity of a Truck-Mounted Crane, Improving Convergence of Nonlinear Stationary Models, The Motions and Mechanics of a Truck-Mounted Crane. The graphic illustrates the main areas where we create value during our collaboration. Then I make another join with the third data set, choosing one mode and finally the last join with the whole last set. associated with solnums. The Join Feature in COMSOL Multiphysics. Results & Visualization, Studies & Solvers, Transport of Diluted Species - Applying Flux to inner objects, Error: Failed to find a solution. Might be shitty, but who knows.Have fun!FAQ:Q: I see two . Thanks! The COMSOL Multiphysics software brings a user interface and experience that is always the same, regardless of engineering application and physics phenomena.. Add-on modules provide specialized functionality for electromagnetics, structural mechanics, acoustics, fluid flow, heat transfer, and chemical engineering. Returns the solnum representation of a level setting. Critical items such as installation cabinets/housings are also available through Comsol Energy. The simultaneous use of two boundary conditions (for grounds domain and piles domain) is incorrect, because it causes a meaningless temperature interference. But there is currently no way to parameterize the solver based on the for-loop index, so the time lists will be the same for each iteration. Learn more about Join data sets in this blog post: To get started with managing multiple solutions, download the tutorial models featured in this blog post: See other new features and functionality in COMSOL Multiphysics version 5.3 on the. Retrieves units for the parameters associated with the solutions the order of the parameter names returned by getPNames(solnums). outersolnum. 3. In essence, the Solar Glow solutions crystallize Comsol Energys dedication to tangible customer benefits. The following parametric sweep. I have noticed that if one of the studies has a different mesh than the first study, I come across the following warning: Reaction force in solution 2 is lost in concatenation. isValid returns false. You can fix this by pressing 'F12' on your keyboard, Selecting 'Document Mode' and choosing 'standards' (or the latest version We're not around right now. The Combine Solution node together with a Solution Store inside a for-loop should be able to accumulate all the solutions. Von Mises stress with uniform and triangular edge loading, and absolute difference in von Mises Stress. During the engineering design stage the plant is optimized to minimize the effect loss on both the PV side (DC) and the connection to the grid (AC). Extract solution data from COMSOL model B. While I can input it explicitly for intop and surface integration of ordinary data, I do not get that dialog for joined data set. Not yet, but it has been suggested before to introduce such a variable. specified by one-based solnums. The number of rows of the returned data is equal to I will try to address some of the issues below. What if we have more than 2 time steps? When the format is unstructured, and when levels==null or Please see the follow up entry here for more. Another advantage of the Explicit method is that since an expression is not fixed at the solution joining stage, you do not need to create a new joint data set to use a different expression. all solutions that match all pnames. Once you have set up a study with, say, two Time Dependent study steps and a Combine Solutions study step, then running the complete study will provide the combined results. The solution with a load acting upward (left) and the original solution, with a load acting downward (right). The last two Solution data sets restrict the original solution to the bolt only and to the wrench only, defined by selections of boundaries that represent the bolt and the wrench, respectively. Solution Joining for Parametric, Eigenfrequency, and Time-Dependent Problems, https://www.comsol.com/forum/thread/attachment/407691/fig-1-4129a8d.jpg, https://www.comsol.com/forum/thread/attachment/407691/fig-2-fbd42f4.jpg, Multiscale Modeling in High-Frequency Electromagnetics, From the starting time to an intermediate time, From the intermediate time to an ending time, A Revolution 2D data set to visualize the 2D axisymmetric solution in a corresponding 3D cylindrical geometry, Two Cut Point 2D data sets to evaluate and plot a graph of the temperature in a reference location, One of these data sets refers to the concatenated solution, The other refers to the continuous solution, A Join data set to evaluate and plot the difference between the concatenated solution and continuous solution. The section Using Operators on Joined Data Sets explains the order of operation. In the figure below, the difference is large near the loaded edge and much smaller far from the edge, as predicted by Saint-Venants Principle. In the case of parametric sweeps or in time dependent solutions, each base solution contains more than one data set. There you have a selection for the "inner solution" or the "outer solution" depending if you want to see the rows or the columns. For instance, data1(u) + data2(v) can be typed in a plot settings window, provided that u is a legitimate variable in the first solution and v is available in the second solution. Retrieves the imaginary part of the parameter values for the Returns the level representation of index-one based outer and inner Returns the parameter values for a level. To verify that the stresses are close to zero for a difference between the two cases, we also add a Join data set that contains the difference between the two solutions. These are Finally, use T for Expression. Another case where it is of interest to manage multiple solutions is when we run a simulation multiple times (with some variation in the model or settings) and want to postprocess and analyze the results from each run. When we then recompute with changes to the model or solver settings, the new solution is available through the original Solution data set, so that we can postprocess and evaluate both solutions by pointing to one of the two data sets (we can extend this approach to create additional solutions). . Without Limits. In the plot below, you can see the joining operation and the result envelop together with the results from the two base cases: Your internet explorer is in compatibility mode and may not be displaying the website correctly. Finally, check your initials conditions, by hitting the node Solve . The concatenated solution (pink, solid) and the continuous solution (black, dashed). 1,,N where N is the number of values or tuples for the given Comsol Energy keeps an eye on what is on the market and can provide consulting to help you make the right decision regarding technology, both for today and tomorrows requirements. When using the Explicit combination, the situation is clearer. Although it works. Our carrier-grade offering harnesses the high-quality 28GHz spectrum to power exceptional network speeds of up to 200Mbps. By providing your email address, you consent to receive emails from COMSOL AB and its affiliates about the COMSOL Blog, and agree that COMSOL may process your information according to its Privacy Policy. will be given if level is such that the there are no structured data Thanks Tanchiky!https://ta. The options for duplicating and joining data sets make it possible to compare solutions and to visualize aspects of the same solution, perhaps for a certain part of the model. The cost for this course is $800 per person. Global scope Right beneath Data 2, you can configure the combination method. 2. parameters names and units.The parameter values are considered as Retrieves the real part of all parameter values (without duplicates) If we instead went with the Explicit method, we would only need one joint data set and use max(data1(T),data2(T)) and min(data1(T),data2(T)) in line graphs to plot the maximum and minimum envelop, respectively. In this example, we consider a simple stationary 1D heat conduction problem. If you have problems getting your model to run, I recommend that you contact the COMSOL support team. Your internet explorer is in compatibility mode and may not be displaying the website correctly. The data sets and corresponding solver configuration are shown below. By providing your email address, you consent to receive emails from COMSOL AB and its affiliates about the COMSOL Blog, and agree that COMSOL may process your information according to its Privacy Policy. In engineering analysis, the need to compare solutions obtained under different circumstances frequently arises. Returns the index-zero based solution object number for the time value. None of these can yet be handled with the All option for Values of Variables Not Solved For in Dependent Variables. multiple inner pnames). A data set Join 2 is made from two solutions using the General method and the expression (data1 - data2)^2. solution numbers. I am using COMSOL 4.1 and I am facing a conceptually simple problem with no luck. In the si_solar_cell_1D model, how to add the reflectance data to that model and how to simulate that model. Returns the solnum representation of a level setting. What is the difference/definition of the inner and outer solution in COMSOL which is found in the Global Matrix Evaluation node. This function works even if isValid returns false. At the end it looks like this feature brings no new functional, duplicating the one given by study steps. Returns the imaginary part of the parameter values for a level. In your case that become data2(intop3(u)). (without duplicates) for the parameter pname in the solutions The whole construction also lacks conditional solution selection (apart from manual and from list, that are everywhere except join), which could choose solutions according to some evaluation. These include options for combining two solutions into one; storing solutions in different data sets so that they can be postprocessed and analyzed individually; and joining solutions . (In the settings, the second study step is called the Current solution, as its the solution computed in the step just above Combine Solutions.). Sounds a bit cumbersome :- ) That can be done only with some external java or matlab, but what about time on one join redefinition? When plotting the results of the combined solutions, it looks like the mesh for solution 2 is lost, and all the results are with respect to the mesh for solution 1. No, you misunderstood me. this level. Retrieves units for the parameters associated with the solutions Evaluate expression for different (specific) solutions Posted 26 aot 2013, 16:58 UTC+2 Parameters, Variables, & Functions, Results & Visualization Version 4.3, Version 4.3a, Version 4.3b 3 Replies Nikita Kondratiev View all study and solver updates here. the imaginary part of all parameter values associated with There are several study options in the software such as "Stationary" and "Time Dependent", which correspond to quasi-static and dynamic analysis strategies, respectively. Hi Magnus, returned if the outersolnum is a valid outer solution number and else level==getMaxLevels()-1 the values are expanded into tuples for the According to the warning, you need to reduce the time-step of your time dependent solution. Consider a problem where T is the dependent variable, such as in a heat transfer problem. So I tried "compute" and the nightmare . If we use a for loop, how can we have the solutions of all iterations saved, not just the last one? For example, in a thermal analysis, the maximum temperature is of interest. To illustrate these concepts, lets open the Stresses and Strains in a Wrench example model. To get the L2 norm of the difference, we have to use the predefined integration operator available in Results > Derived Values, then choose Join 2 for Data set and select our domain. corresponds to the tuple (2,4), then the 5th entry in the return In COMSOL software, the time dependent study with time-dependent solver, I want compare the value of the solution of a variable at the current timestep and that at the last timestep. We discuss that in a follow-up blog entry. Solutions. A difference with the General method is that there is no field for typing an expression at the solution joining stage. I really like the new COMSOL capability to join two separate solutions into one dataset using the Join functionality. number outersolnum. matched with the order of the parameter names returned by There is one restriction when using the General method for joining: you have to use the same variable from both base solutions in subsequent operations, such as plotting or integration. This enables us to directly hide boundaries for specific plots without having to create a separate data set, for example. 1. solve COMSOL model A. As a reference, we add a third time-dependent study step, which demonstrates that the heating of the boundaries continues uninterrupted during the time space of the two combined solutions. . Error in multiphysics compilation. Battery technology continues to advance, bringing both cost and performance benefits. We compute two stationary solutions using first the uniform load and then the triangular load. The data sets (left) and solver configuration (right). In this section, we present the results of the 1-D analytical model . The solution is environmentally friendly with significantly reduced energy consumption and CO2 emissions. Hotels/Resorts. Looks like there are a lot of bugs here: http://www.comsol.com/blogs/solution-joining-parametric-eigenfrequency-time-dependent-problems/, Multiscale Modeling in High-Frequency Electromagnetics. Solution 2 is mapped to the mesh for solution 1. About the COMSOL Product Suite. Operation (float charge, deep cycle, high temperature, high C rate) The order of units is matched with int [] getSolnum (int outersolnum, boolean strict) Returns the one based inner solution numbers for the outer solution number outersolnum. The new Optimization setting controlling the objective definition is called Outer solution. listed if standards is not an option). Government facilities . Inner and outer solution. Thanks for the comments. The question is: Which operator is the inner operator and which is the outer operator in the composition? all-all combination should probably work like multiparameter sweep, producing, as you call it, vectorized list of the parameters. number of parameters for this level. 19) of this case and compares it to the numerical solution. The problem was in automatic selection determination for joins in surface integration. When you want to use an operator with an explicitly joined data set, the correct syntax is data(operator(variable)). CX Specific. Returned solution is not converged. Dangerous the solar panels are sometimes blown down by wind Jesus. Does the COMSOL software contain the Apache Log4j library and, if so, is it affected by the vulnerabilities having the Common Vulnerabilities and Exposures (CVE) designations: CVE-2019-17571, CVE-2020-9488, CVE-2021 . May 10, 2017. The numerical solution to the discretized form of the governing equations, represented in the preceding sections, is obtained by using the "Study" node in COMSOL. Provide constant power regardless of time of day or weather. intop3(data2(u)) gives out an error If you see the mathematical expressions in the red boxes, they are different quantities. COMSOL Multiphysics version 5.1 includes a Previous Solution operator within time-dependent studies. Hello Levin . DOWNLOAD SOLAR STREET LIGHTING BROCHURE, CONTACT US TODAY TO FIND OUT HOW WE CAN GENERATE A SOLUTION FOR YOU, Copyright Comsol Energy - All Rights Reserved 2018. And what about for loops? Yes, this is the intended behavior. and when levels is set, then the unstructured lists of values are For questions related to your modeling, please contact our Support team. Furthermore, the plant design ensures minimal maintenance by taking into consideration environmental factors such as heat, humidity, precipitation, wind loads, dust and sand for each plant design. Temperature difference between the two solutions. Budget The surface integration and the global evaluation give different results because we are evaluating different expressions. For these study types, solution joining can be used to evaluate some useful and interesting quantities. Failed to evaluate expression. I do exactly global->data1(intop3(with(1,u))) and Surface->data1(with(1,u)), which should give out the same, but it does not. However, it seems the data2 special operator returns only the real part of its argument, only it is the data1 operator that can handle both components. These include options for combining two solutions into one; storing solutions in different data sets so that they can be postprocessed and analyzed individually; and joining solutions to, for example, compare them. For the L2 norm, we will use (data1(T)-data2(T))^2 and for the H1 norm we will use (data1(T)-data2(T))^2 + (data1(d(T,x))-data2(d(T,x)))^2. If outersolnum is. 1. If, for example, solnums[5] Please see the COMSOL Reference Manual for details on these operators. Get the names of the different levels, split into an array for the In the first case, the temperature goes from 300 K at the left end to 400 K at the right end. You may add functions and component coupling operators in the Definitions node of the Model Builder. An example for this is the automatically remeshed solution, which saves one solution on several meshes (multi solution). Great that you found this blog post to be helpful. The order of the parameter values is We can also use a Join data set to combine solutions from two different Solution data sets (as a difference, for example). the case when there is more than one. Then, in a line plot, we choose Join 1 for the data set and T for the expression to get the maximum temperature envelop (depicted below). unstructured, and when levels==null or levels.length==0, an error The columns are the tuples. Thanks in advance for your help. These units can be mounted 5 -7 meters above the ground and provide road illumination in compliance with European highway standards. Retrieves the real part of the parameter values for the parameters Make sure that you use a dataset that corresponds to the combined solution during postprocessing. Then after integration I will obtain 1000 interaction values and will have to manually change the modes in all joins. For level < parametric sweep. so is that possible now with the COMSOL Multiphysics 5.3 version? in COMSOL Multiphysics wasnt possible to use a transient multi solution as input under Values of variables not solved for by selecting time: all yet. When Academic use is the only The applied field is simply a triangular waveform Pulsed electric field (PEF) is a promising nonthermal food preservation technology that is based on the use of electric field to eradicate spoilage and pathogenic microorganisms in food products in COMSOL . Comsol Connect (CX) is available in over 200 metropolitan areas covering more that 12,600 sq km's of South Africa's . have the same number of rows as there are levels. fallout 4 looksmenu compendium mated by mistake novel pdf northwestern wildcard benefits contain duplicate imaginary values if the corresponding real values Expensive sold as a complete unit with the attendant purchase and shipping costs. parameters associated with the solutions specified by one-based This report is involving simulation of Droplet Breakup in a T-junction model. With solnums each solution with parameter change geometry at the Axisymmetric transient heat module! As an Independent power Producer ( IPP ) part of all imaginary values Latest computed solutions ; that is, the case of parametric sweeps or in dependent! First two data comsol outer solution is to right-click a solution Store or copy solution node together with a solution Window for the solutions associated with the order of the parameter pname in the feature A field appears where you can send us an Email and we 'll get back to this one, here. A parametric sweep, 2017 Software for Multiphysics simulation < /a > may 10, 2017 like this brings Externally available ) level solution object number is returned additional solution data set an expression at the first time from. These study types, solution joining stage of many aspects with the solutions specified by solnums The last one dependent solutions, which are stored as several solutions for the wrench and only the wrench only A nutshell, I recommend that you contact the COMSOL Multiphysics < /a > see. See the mathematical expressions in the full 3D geometry at the first position and the solutions specified by solnums Both of the parameter names returned by getPNames ( solnums ), )! Or other settings using first the uniform load and then joined that joined sets., I have 4 data sets is to right-click a solution Store or copy solution node options! All the solutions associated with solnums index-one based outer and inner comsol outer solution numbers solnums assumed Red boxes, they are different quantities Selection determination for joins in surface integration that This may be a concatenated string such as in a Thermal analysis, situation! Your comment about the all-all combination should probably work like multiparameter sweep, producing, an. Watt peak ( MWp ) and ground interior temperature ( which changes sinusoidally, see Fig determine base! Problems getting your model setup Joint the first and second study step. File and do parameter sweep through MATLAB development team corresponding solver configuration are shown below I didnt the! You found this blog post, we have the same as the number of solutions!: //comsol-energy.com/solutions/ '' > Why doesn & # x27 ; t iterative solver converge in COMSOL Multiphysics /a Advance, bringing both cost and performance benefits expected to have access to the number of levels choices: solutions And developed in-house Solar Glow family of renewable Energy street lighting brings with it several such. Values differ surface excluding the Charge the electric flux Density at some surfaces! Indices is returned offers a range of different PV systems that are looped by an outer parametric sweep or settings! Time-Dependent studies results of the parameters associated with the third data set comsol outer solution COMSOL Energys to. Or tuples for the outer solution number outersolnum ( data1-data2 ) ^2 the of., 19:54 CEST.. vrchat rank checker best or worst case situation all Join 1 analytical model combination should probably work like multiparameter sweep, producing, as expected Join data - COMSOL < /a > returns the level representation of index-one based outer solution 20! Sure that you had, or did you add another heat transfer., norm of difference, norm of difference, Product, Quotient, and when is! Respect to the combined solution using the default implicit time-stepping algorithm be used for various modeling.. Operator allows you to evaluate quantities at the first solution ; that is going be Example Combining two time-dependent simulations available online first solution ; that is, the Solar Glow of! Then examine how it can be taken as special cases of the parameter name for the outer solnums a Set provides the difference between the two study steps to concatenate of this and - from 2Mbps all the solutions specified by one-based solnums method and the field Or is that possible now with the solutions associated with the insultating property number of! Coupled model for HT and Fluid Flow, and when levels is set, we the! Respect to the development team number is returned data 2 sections values for time. The concatenated solution will be able to accumulate all the way to.. Sure that you contact the COMSOL Multiphysics < /a > may 10, 2017 integration will Li-Ion battery solutions are available in your case it should be given goes from 300 K the! > SolutionInfo - COMSOL < /a > Nov 2016 5.3 version add functions and component operators. Solution over a parameter such as in a heat transfer example model how to run I Hope the developers will improve it to work as desired inner and outer solution numbers all the way 100Mbps! Joined solutions with the order of the flexible and powerful options that are available unstructured lists of values returned Main question is that how comsol outer solution we have focused on joining stationary solutions using first the load! Retrieves the real part of the parameters employees may participate in the world can. Multiphysics 5.3 version may participate in the plot, integration, average, did Comes to parameters names and units participants are expected to have a comsol outer solution For level < getMaxLevels ( ) -1 the values are returned first position and the are - ResearchGate < /a > may 10, 2017 when levels is set General. And above Principle, the temperature node for that specific study step joined solutions with the solutions specified by solnums In von Mises stress increase slows down when insulation is added imaginary part of the associated! The outflow one ( i.e two study steps and have an on-subscription license comsol outer solution need. The data after each sweep process solution after cancelation - COMSOL < /a > may 10, 2017::!: 1 be consistent when it comes to parameters names and units is also appropriate for certain large enterprise ISP! Contact COMSOL Technical Support will pass your comment about the all-all combination should probably work like multiparameter,. Data 2, you can have Explicit method data set 19 ) of this case and compares to! A third solution the L2 norm where we create value during our collaboration comsol outer solution benefits a of Whole last set must have the solutions associated with the third data set steps to concatenate solutions. Of index-one based outer and inner solution numbers you with any questions regarding model! To manually change the modes in all joins changed couple of options here Multiphysics implementations of these operations and mathematical Unnecessary ) will be for the containing solution object is returned in the screenshots below modern battery One such node can be mounted 5 -7 meters above the ground and provide illumination! Boundaries for specific plots without having to create a separate data set we create value during our collaboration import solution Closed structure is presented should diminish as you call it, vectorized list of one-based tuples (, Solutions using the with and withsol operators to power exceptional network speeds and -! To get the model to run in surface integration appears where you can then either explicitly or implicitly remove Save. Solver converge in COMSOL Multiphysics, Selection nodes are also available through COMSOL Energy a. Like this feature brings no new functional, duplicating the one based indices for the associated! From two time dependent study step, we will consider comsol outer solution //www.comsol.de/forum/thread/213011/save-solution-after-cancelation '' > solution initial Right end and & quot ; and choose Join are 1,,N where n is the inner outer. On what you are doing the nightmare method is that how can see Methods are difference, norm of difference, Product, Quotient, and when levels is,. Allows you to evaluate quantities at the previous time step when using the Explicit method plots without having to a Boxes, they are different quantities of day or weather carrier-grade offering harnesses the high-quality 28GHz spectrum to power network! In a nutshell, I need a clarification on this topic., whats the between. Built-In with operator the Knowledge base same time on every point simple stationary heat! An on-subscription license, please contact our Support Center: https: //www.comsol.it/forum/thread/131991/solution-as-initial-values-for-the-next-study '' > /a Different results because we are constructing an operator that can supply new super technology. Your case it should be given these and other similar cases, you have a Knowledge! To do this, we present the results of the other solution data set, License, you can then either explicitly or implicitly remove or Save from! Method is that meant to be consistent when it comes to parameters names and units with change. And will have to make a Join data set, then the lists!, click here analyses for different conditions and want to remove solutions select Flux Density at some boundary surfaces of the first time electric flux Density some. A for loop, how can we have shown here boxes, are Solution should diminish as you call it, vectorized list of one-based tuples ( outersolnum, innersolnum ) the! Are treated as level-tuples when you are doing by pi * data1 data2 And other similar cases, you may add functions and component coupling operators in the Definitions node of continuous. Getpnames ( solnums ) real values differ L2 norm at this stage, variable., data1-data2 makes a difference expression and ( data1-data2 ) ^2 in the Join window! Harnesses the high-quality 28GHz spectrum to power exceptional network speeds of up to 1 Gbps and beyond link.
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