Category:Tools and Techniques

August 18th, 2014

Video Tutorial: How to Use Steam Tables

By Douglas Clark | Comments (0)
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This video tutorial introduces simple steam tables, the differences between different types of steam tables, and how to use them.

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July 15th, 2014

Video Tutorial: Reactor Symbols

By Douglas Clark | Comments (0)
Screen Shot 2014-07-14 at 10.45.58 PM

If you can’t tell the symbol for a packed bed reactor from a plug flow reactor, brush up on reactor symbols here.

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June 17th, 2014

More Excel Tutorials: Excel for Chemical Engineers

By Douglas Clark | Comments (0)
Cat at computer keyboard

From our archives comes a popular Excel tutorial for chemical engineers, developed by ChE Todd Krueger. Check it out for more on pivot tables, macros, indirect references, and more.

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June 12th, 2014

Tutorial: Excel Scatter Charts and More

By admin | Comments (0)
Excel charts and graphs for chemical engineers

Excel got you down? Get up to speed with a ton of tutorials on chemical engineering computing using Excel and Matlab.

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May 20th, 2014

Tutorial: Block Flow, Process Flow, and Piping & Instrumentation Diagrams

By Douglas Clark | Comments (0)
Screen Shot 2014-05-20 at 6.31.29 AM

If you need an overview on process design diagrams, check out this comparison of block flow diagrams (BFDs), process flow diagrams (PFDs), and piping and instrumentation diagrams (PIDs).

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February 26th, 2014

STENDRA FOR SALE

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STENDRA FOR SALE, Confused by Reynolds' transport theorem. This short video should help clear up many of your questions, order STENDRA online c.o.d. STENDRA blogs, If you're looking for more information on other concepts in fluid mechanics, check out the entire Fluid Mechanics Playlist, STENDRA australia, uk, us, usa, Order STENDRA from mexican pharmacy, from the Learn ChemE series presented by the University of Colorado Boulder. You can also find a wide variety of topics covered from other area of chemical engineering on the main Learn ChemE Series page.

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February 25th, 2014

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BUY NITRAZEPAM NO PRESCRIPTION, Following Oprah's advice that you can never be too rich, too thin or hoard too much data (which, of course, trumps thin and rich among a majority of scientists), the US Geological Survey (USGS) just released the first publicly available interactive map showing 47,000 onshore wind turbine locations across the United States, from large, sprawling wind farms all the way down to solitary turbines. NITRAZEPAM canada, mexico, india,

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Even though this huge data dump creates opportunities for wide-ranging research, the USGS will use the map to assess wind energy's effects on wildlife, japan, craiglist, ebay, overseas, paypal, Buy NITRAZEPAM no prescription, according to an explanatory blog post. For example, turbine-level data will improve the ability to study wildlife collisions from wind turbine wakes, NITRAZEPAM samples, Buy cheap NITRAZEPAM no rx, ground based radar, and wind facilities overlapping with migratory flyways (click here to open the map)

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More magnification reveals the basic contours of a wind farm a few miles outside of the city, where it's easy to see the changes in terrain, whether it's desolate or used for farming and ranching.

Jumping down another level, separate turbines appear, defined by their individual shadows, and you can now access in-depth information about each with a simple click of the mouse.

This is a powerful productivity tool. Researchers will find it's very useful – and hobbyist and dataholics can quit loitering outside of Google data centers for that binary code contact high. As Secretary of the Interior Sally Jewell pointed out in a press release, “In making this critical information available to the public, the USGS has provided data that will help improve the siting of future wind energy projects, as well as aid land managers in devising more up-to-date land-use and multiple-use plans.”

Is this a good example of using big data to improve productivity?


Images: wind turbine, Harvey McDaniel; Wind map, USGS

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February 12th, 2014

BUY GENERIC MODAFINIL NO PRESCRIPTION

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Now that the US Energy Information Administration has unveiled an expanded interactive mapping BUY GENERIC MODAFINIL NO PRESCRIPTION, tool that displays the locations of oil and gas wells across the United States, users can track trends across specific plays, starting on a regional level, where busy oil and natural gas exploration has transformed wide swaths of Texas, North Dakota and the Northeast, and then they can drill down to find each well.

With this addition, kjøpe GENERIC MODAFINIL på nett, köpa GENERIC MODAFINIL online, What is GENERIC MODAFINIL, users can see every facet of the complex US energy landscape, from the upstream oil and gas plays, buy no prescription GENERIC MODAFINIL online, No prescription GENERIC MODAFINIL online, to midstream pipelines, and downstream refineries and power plants, GENERIC MODAFINIL duration, Buy GENERIC MODAFINIL without a prescription, including fossil fuel, nuclear, GENERIC MODAFINIL no rx, GENERIC MODAFINIL description, wind, solar and biomass, buy GENERIC MODAFINIL without prescription. Japan, craiglist, ebay, overseas, paypal, Integrated into one tool, it's an evolving energy ecosystem at your finger tips, buy cheap GENERIC MODAFINIL no rx. GENERIC MODAFINIL samples, If, for example, buy GENERIC MODAFINIL online no prescription, Buying GENERIC MODAFINIL online over the counter, you're reading about how two-thirds of the production in North Dakota’s Bakken shale oil field rides the rails because of a shortage of pipelines, you can easily toggle between a graphic of the densely clustered area (highlighted in brown on map below) hugging the Canadian border and another showing the limited number of pipelines leaving the area, GENERIC MODAFINIL dangers. Get GENERIC MODAFINIL,


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The EIA’s mapping tool isn't the only new data source tracking the United States oil and gas boom. Last October, the EIA started issuing a monthly report on new well productivity. This helps shed light on the vigor of the boom. This close look also includes the decline rates of old wells and overall production in six drilling hot spots.

The six regions – including the Eagle Ford Shale, Permian Basin, and Haynesville Shale in parts of Texas – accounted for 90 percent of domestic oil production growth and virtually all U.S. natural gas production gains from 2011 to 2012, as energy companies combine hydraulic fracturing and horizontal drilling to unlock the hydrocarbons buried deep underground.

Does this type of data sharing boost productivity?


Images: Pump Jack, roy.luckv; maps, EIA

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February 10th, 2014

ZYRTEC FOR SALE

By ChenectedGuest | Comments (0)
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ZYRTEC FOR SALE, by Moritz von Stosch, PhD

Imagine you want to make beer, and not just any beer, but great beer. You have all the ingredients, all the equipment and you already made your first attempt with a simple recipe. Now, where can i find ZYRTEC online, how do you start to improve the taste.

One simple way to is to gradually note changes in taste as you vary the amount of ingredients, Online ZYRTEC without a prescription, adjust the fermentation time, or alter the fermentation temperature (Figure 1a, below). You could even do this more systematic by applying a statistical design of experiments, ZYRTEC pharmacy, making sure that you capture all possible influence factors (Figure 1b). The next step would probably be to quantify the taste more objectively, using some analytic device rather than tasting and rating the beer yourself, ZYRTEC FOR SALE. Once you are at this level, Fast shipping ZYRTEC, i.e., you already have a lot of data, you might as well decide to use a data-driven modeling tool, which links the different influence factors (such as ingredients, buy ZYRTEC online cod, fermentation time or temperature) to the analytic quantified taste of beer (Figure 1c).

Most likely this data-driven model would tell you how the optimal factors might make your beer taste good. ZYRTEC gel, ointment, cream, pill, spray, continuous-release, extended-release, Simple, systematic, and objective oriented, this seems to be a good approach, real brand ZYRTEC online, and yet you hardly used your chemical engineering education, even though brewing beer is the kind of batch process you learned so much about in school. Buy ZYRTEC without a prescription, So how would you solve this problem using your education.

[caption id="attachment_73557" align="aligncenter" width="470" caption="Figure 1 – Click to Enlarge"]Figure 1[/caption]

Putting chemical engineering skills to work

ZYRTEC FOR SALE, That’s right, material balances. Just do the balance for ingredient 1, ingredient 2, ingredient x and the balance of the taste, ZYRTEC dose. Done. Does it look like in Figure 1d. My ZYRTEC experience, But what order do the reaction rates belong to. Most reactions are of the first order so you might stick with that, even though it is a bioprocess, ZYRTEC FOR SALE. You could also do some fermentations and try to figure out what the most suitable expression for the reaction rates is, but that will probably take significant time and effort. Nevertheless, ZYRTEC class, with the help of the model you will finally get a good—maybe even better tasting—beer.

Which option do you think requires the least effort, ZYRTEC online cod, and which one will identify the best taste. Depending on the circumstances, either could be successful, and either one could turn out to be easier, buying ZYRTEC online over the counter. ZYRTEC FOR SALE, But why use only one or the other option and not combine both, with hybrid modeling.

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The first modeling approach is data-driven, the second approach is fundamental. ZYRTEC street price, The combination of the two is typically referred to as hybrid modeling, more specifically hybrid semi-parametric modeling.

This method allows you to integrate all available knowledge into one approach, ZYRTEC for sale, while reducing effort and maintaining accuracy. In the above case, for example, you can derive the material balances, but instead of trying to derive an expression for the kinetic rates, a data-driven model would be used for their representation (Figure 1e), ZYRTEC FOR SALE. Thus, Doses ZYRTEC work, it’s easier to derive this model compared to a fundamental model. In addition, fewer experiments are usually required to derive the data-driven model that is a part of the hybrid model, compared to a standalone data-driven model, rx free ZYRTEC. The reason for this is because the incorporated fundamental knowledge structures the interactions of the variables, ZYRTEC wiki, whereas they must be tested experimentally for strictly data-driven models. ZYRTEC FOR SALE, For example, the impact of the fermentation time is implicitly captured in the hybrid model, whereas the impact of the standalone data-driven model would have to be tested experimentally. In general, hybrid models offer a higher benefit/cost ratio for solving complex models, compared to models solely base on one source of knowledge, ZYRTEC reviews.

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Each modeling approach, whether hybrid, Ordering ZYRTEC online, fundamental, or data-driven, is suited for certain conditions. Fundamental models allow explaining the behavior of a system in a broad range, ZYRTEC maximum dosage. Data-driven approaches can be applied when nothing at all is known about the functioning of the system. Every time different sources of knowledge are available, it is efficient to use hybrid models, especially when the model development is rather objective-driven (e.g., a model for optimization), ZYRTEC FOR SALE. As such, Comprar en línea ZYRTEC, comprar ZYRTEC baratos, hybrid modeling is very attractive for applied research.

Imagine you already derived a fundamental model, but for some reason the estimation error values are great for some of the experiments. In this case you could use a data-driven model in parallel to the fundamental model, no prescription ZYRTEC online, in order to identify whether the estimation error can be explained by a function of variable combinations, as is shown in Figure 2. Buy generic ZYRTEC, This can help to understand what part of the model needs to be refined.

[caption id="attachment_73560" align="aligncenter" width="470" caption="Figure 2 – Click to Enlarge"]Figure 2 ZYRTEC FOR SALE, [/caption]

The other possibility is to use a data-driven model to represent the variables in the fundamental model for which it is difficult to derive mathematical expressions, such as for the reaction rates in the case above. This approach, referred to as serial hybrid model, allows describing and understanding a system, ZYRTEC mg, even though the underlying phenomena are unidentified at the outset.

Applying hybrid models to your projects


Hybrid models can provide accurate predictions at an acceptable cost. They can successfully be applied to advanced process monitoring, optimization and control (check out these for more information: Article 1, Article 2, Article 3). The above outlined features of hybrid models have the potential to save resources, reduce timelines, and improve manufacturing. If hybrid modeling could work for you, consider also checking out this article (in addition to the articles listed above) and this course as one starting point.

Dr. Moritz von Stosch is a member of the faculty in the Department of Chemistry, Faculty of Sciences and Technology, at Portugal's Universidade Nova de Lisboa.

Do you, or could you, use hybrid modeling in your job?


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January 7th, 2014

EFFEXOR FOR SALE

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pressure-enthalpy diagram EFFEXOR FOR SALE, If a lecture left you in the dust, or your textbook just isn't clear to you on the subject of  pressure-enthalpy diagrams, check out this tutorial. This video explains the parts of a  pressure-enthalpy diagram for a single-component system and discusses how enthalpy depends on pressure for water, EFFEXOR brand name. EFFEXOR interactions, If these diagrams are a breeze for you, or you're just looking for help with another concept, purchase EFFEXOR online no prescription, Where can i order EFFEXOR without prescription, check out other chemical engineering tutorials in the Learn ChemE Engineering Screencast series.

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