An obstacle in GWR method (in arcMap)?

Results in OLS method, illustrate a strong relationship between 3 explanatory variables and a dependent variable; however, when it comes to GWR method(using the same explanatory variables),...

27 December 2020 3,508 1 View

What are the effect of data spread on Random Forest model performance?

Since I am using the Random Forest model in R to predict LST (land surface temperature) from actual LST, I realized that model performance is better in lower Average LSTs, thus I wanted to extract...

14 October 2020 9,278 2 View

What is the major meaning of PCs in Principal Component Analysis?

I am using PCA to extract major meaningful data from many different parameters that are embedded in my remote sensing satellite imagery. I know that PCA is a dimension reduction model and the...

13 September 2020 7,596 7 View

Is there any specific Proportion for training and testing set for remote sensing images?

Can I use one Sentinel image for training my model and another one for testing? Since i have two or three images, I wanted to use one or two image for training and the rest for test. However, I...

20 August 2020 9,028 6 View

Solve open channel flow only for turbulence (Ansys-Fluent)?

I am working on an open channel problem. Multi-phase (water+air) VOF, and k-epsilon turbulence model are utilized. I want to study the turbulent characteristics (for example k and epsilon) of the...

10 June 2020 10,009 4 View

Modeling open-channel flows as single-phase in Ansys-Fluent?

I work on an open-channel problem. My current model is a multi-phase (water+air) VOF, with k-epsilon turbulence model. Due to high computational cost of the current model I want to consider...

10 June 2020 331 14 View

How to reduce computational costs of an open-channel flow in Ansys-Fluent?

I am working on an open-channel multi-phase (water+air) flow with k-epsilon turbulence model. How can the computational cost of the model be minimized, while the accuracy and convergence are ensured?

10 June 2020 3,629 8 View

Is it possible to use plant extract as natural sterilizer?

For economic reasons, sterilzation against covid_19 is very necessary, so is it possible to use plant extract?

11 May 2020 2,674 14 View

How to subdivide an RSM (Response Surface Method) domain?

A question just came to my mind! I appreciate any helpful answers. Consider a problem that there are a number of input variables (for example 5 variables), and we have one output parameter. The...

08 April 2020 8,622 3 View

What is the best type of classification(clustering method)?

Currently, I am using SENTINEL2 satellite images in finding the spectral signature of a phenomenon in my study area, therefore I want to use a supervised classification method that specifically...

04 April 2020 4,926 11 View

I have designed reflectarray element and feeding it though Horn Antenna on HFSS. After full wave simulation, I am not getting desired results?

I have designed reflectarray element to generate OAM beams at 5.8GHz and feeding it though Horn Antenna on HFSS. After full wave simulation, i am not getting desired results i.e Radiation pattern...

01 March 2021 9,701 5 View

Does the circuit modeling for planar monopole antennas using Foster canonical forms give good approximation?

Hi researchers, I am searching for some accurate way to do the circuit modeling of planar CPW-fed monopole antennas. I have gone through the literature where mostly circuit modeling is done using...

28 February 2021 7,016 1 View

Microstrip antenna design tutorial of HFSS 3D layout module ?

I have designed a 24 GHz rectangular antenna on HFSS 3D model and got desired results while desing the same antenna with same dimensions I am getting resonance frequency at 27 GHz I am...

28 February 2021 4,426 2 View

What is Flat Lens Antenna?

28 February 2021 5,433 3 View

Compact antenna for the frequency range 1 MHz-5 MHz?

Hello everybody! I have a problem with developing a compact antenna for the 1MHz-5MHz frequency range. Tell me what type of antenna can be used and what books and articles to read to perform this...

27 February 2021 7,710 4 View

Can impedance of antenna be less than 50 ohms?

I am simulating helix antenna in hfss, right now, giving excitation with 50 ohms port. When I see the results of Z parameter (real). It shows lower than 50 ohms. Do not understand, if it can be...

27 February 2021 4,218 7 View

How to identify what type of fillers are in a polymer?

Hello everyone, I have some PHAs blended with fillers and nucleating agents, yet I don't know what kind of fillers or nucleating agents. The producer has shut down and there's no way to get in...

24 February 2021 1,356 8 View

Efficiency of Proximity Feed Patch Antenna ?

Greetings to all of You! I have searched some research papers for the designing of a proximity coupled patch antenna. Researchers are talking about the impedance bandwidth of the antenna but...

24 February 2021 7,662 3 View

2D or 3D phased array antennas??

Dear All, I will start my PhD maybe this year regarding phased array antennas. I'm interested in to find more detailed information about 3D phased array antennas and 2D phased array antennas. Then...

21 February 2021 368 3 View

Helix antenna coupling problem?

Dealing with a helix antenna, made with flexible material and not rigid like using a PCB board or wire. At the beginning of the helix is too close to the ground plane, causing coupling. How can I...

21 February 2021 4,453 3 View