How can I measure the longitudinal dispersion coefficient of the solution?

More Mohsen Nasrabadi's questions See All

What is/are the best ML classifier(s) for Sentinel2 images?

Hi I am trying to segment a sentinel2 image. At this stage, I want to run a binary classifier that assigns each pixel to either farm or non-farm pixel. For this purpose, I have 4 10m bands...

15 February 2021 3,596 9 View

Does sds interfere with immunization?

I want to extract a protein from polyacrylamide gel to be used for immunization. I am wondering if I need to run PAGE since sds might interfere with the immunization process. Thank you

10 February 2021 8,568 3 View

What reference do you recommend about doublet lattice method (DLM) coupling with finite element method (FEM) ?

I want to write a code related to the flutter of aeroelastic wing under unsteady load using doublet lattice method (DLM). I want a good reference with numerical examples or a book which learn me...

25 January 2021 7,488 3 View

Recombinant restriction enzyme: how strong should the corresponding methyltransferase expression level be?

Hello. We are planning expression of a restriction enzyme in E. coli, and wondering how much of the corresponding methyltransferase is needed to be expressed in order to protect the host genome...

23 January 2021 2,096 4 View

I'm looking for different RCA's classifications in America?

Please help me find a brief history of Recycled Concrete Aggregate (RCA) CLASSIFICATION in the U.S. any paper or Official U.S. state DOTs' document. Target: To find out how many classifications of...

12 January 2021 7,564 3 View

What is the best statistical method for analysis of pooled fecal samples?

Hello We performed a study on the intestinal microbiota of rats in six intervention groups (8 rats in each group). It is suggested that since the rats in each group were the same in terms of...

10 January 2021 2,507 4 View

What are the best new released researches regarding income inequality in India ?

I need to survey the result of the inquiries regarding the origins of the reproduction of income inequality in the india for literature review of my thesis.

23 December 2020 850 3 View

How to read an HPLC report?

I have four HPLC graphs (for methyl ethyl ketone (MEK) and sulfuric acid and little organic monomers) and I want to analyze them. Is there anyone who can help me with this?

23 December 2020 6,180 3 View

Which free software you prefer to get your STL file measurements ?

here I'm asking about different variants of 3D software's used to get STL file measurements made from CBCT

20 December 2020 4,450 2 View

How to solve OdbError in Abaqus Python script?

I am running a 3D solid model in Abaqus Python script, which is supposed to be analyzed for 200 times as the model has been arranged in a for loop (for i in range(0,199):). Sometimes, I receive...

09 December 2020 7,401 3 View

How to compare two groups with only two measurements?

Hiiiii everyone! I have an enquiry on statistical analysis. I was looking for many forum and it's still cannot solve my problem. I want to compare means of two groups of data but only with two...

03 March 2021 8,796 3 View

Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence?

I am on the lookout for the Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence. Does anyone know where I can find it? Thank you in advance

03 March 2021 3,568 1 View

What kind of fluid could I use for a pitfall trap that also does not invalidate molecular testing?

Hi, I want to start testing pitfall trap to obtain ants samples, but I need to conduct molecular analysis on those insects. So, what kind of fluid can I use? Ethanol expires too early and I need...

03 March 2021 5,978 5 View

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10?

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10? Since, the growth curve from day 2 to 10 won't be like the "Logistic curve" it might not follow logistic...

03 March 2021 1,401 3 View

Do we need to write protocol for a second study of a systematic review that has been registered and published?

I have conducted and published a systematic review and meta-analysis research with the topic related to public health and health pomotion (protocol was registed in PROSPERO). Now we want to...

03 March 2021 8,920 3 View

How to increase a model accuracy ?

dear community, my model is based feature extraction from non stationary signals using discrete Wavelet Transform and then using statistical features then machine learning classifiers in order to...

03 March 2021 6,994 5 View

1. What is the impact of having different scales in a survey? and how can we solve this problem before and after data collection (Literature)?

1. What is the impact of having different scales in a survey? and how can we solve this problem before and after data collection (Literature-based reflection)? Thank you for your time and for...

03 March 2021 2,870 3 View

What degree of missing data in a particular case/participant results in Expectation-Maximisation no longer working?

I'm dealing with a mediation model and am using the PROCESS module in SPSS. Due to SPSS and PROCESS being limited in the imputation methods - being unable to handle multiple imputation - the other...

02 March 2021 4,362 1 View

Do I need to do linear regression before running mediation analysis using PROCESS MACRO by Hayes ?

I just wanted to check if I need to run a linear regression separately if I am using PROCESS MACRO to run mediation analysis. Thank you.

02 March 2021 4,359 3 View

Sample dilution for quantitative analysis using ELISA?

If the detection range is in ng/ml but the reference range is in ug/ml for a molecule or protein in serum or plasma .how to dilute and what is the initial volume to be taken for quantitative analysis

02 March 2021 7,670 3 View

Dr. Senthilvel Vasudevan

Hi,

Refer the following links for your question.

http://onlinelibrary.wiley.com/doi/10.1029/91WR00115/abstract

http://147.213.145.2/vc_articles/2013_61_3_Sahay_214.pdf

http://www.rdinstruments.com/pdfs/Carr_Rehmann_JHE_2007.pdf

http://www98.griffith.edu.au/dspace/bitstream/handle/10072/47076/78837_1.pdf?sequence=1

http://pubs.usgs.gov/pp/0582a/report.pdf

Mohsen Nasrabadi

I read these papers. But my problem was not soved.

Please find the attached file.

I have the solution concentration (mg/l) in the different time (s) in a rectangular channel and I want to experimentally estimate the longitudinal dispersion coefficient with a high accuracy.

James Leigh

Would it be possible to use eqn (2) in the Sahay 2013 paper (J Hydrol Hydromech 61:214-221) with given values of U , M0, A and x . and your concentration and time data to solve for K for each time/ concentration pair. This would require a graphical or iterative solution for K . You would then average the different K estimates..

Thanks for your helps

But the eq (2) in this paper has been derived by analytical solution.

Please have a glance to attached paper

Abbas Parsaie

سلام

تو جلد دوم کتاب هیدرولیک دکتر شوشتری نحوه محاسبه ظریب پخش ار پروفیل غلظت همراه با مثال توضیح داده شده. اگه دسترسی ندارید بگید که براتون اسکن کنم بفرستم.

موفق باشید

درضمن من از روی اون برای پروقیل غلظت رودخانه سورن یه فایل اکسل تهیه کردم قبلا. اگه پیداش کرم براتون میفرستم

در کتالب هیدرولیک کانال ها تألیف دکتر محمودیان شوشتری توضیحاتی در مورد محاسبه ضریب پخش طولی ارایه شده است که این توضیحات دقیقا ترجمه کتاب هیدرولیک رانگا راجو است. خود رانگا راجو در کتابش عنوان کرده که این روش خطای زیادی دارد و برای مطالعات رودخانه کاربرد دارد

برای من دقت روش بسیار اهمیت دارد

با سلام

من مقالات 2015و2016 دیدم که هنوز از این روش برای مطالعات رودخانه استفاده میشه. این روش یک مپینگ دو نمودار بر روی یکدیگر است . به نظزم اگه پارامترها درست تنظیم بشن دقتش برا مطالعات آزمایشگاهی هم مناسبه.

با تقدیم احترام

پارسائی