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The Unix epoch (or Unix time or POSIX time or Unix timestamp) is the number of seconds that have elapsed since January 1, 1970 (midnight UTC/GMT), not counting leap seconds (in ISO 8601: 1970-01-01T00:00:00Z).Literally speaking the epoch is Unix time 0 (midnight 1/1/1970), but 'epoch' is often used as a synonym for Unix time.Some systems store epoch dates as a signed 32-bit integer, which might cause problems on January 19, 2038 (known as the Year 2038 problem or Y2038).The converter on this page converts timestamps in seconds (10-digit), milliseconds (13-digit) and microseconds (16-digit) to readable dates.
World Time Buddy (WTB) is a convenient world clock, a time zone converter, and an online meeting scheduler. It's one of the best online productivity tools for those often finding themselves traveling, in flights, in online meetings or just calling friends and family abroad.
Technology Level 3: A DEEC-Tec-based ocean wave energy converter is an example of an energy harnessing/converting structure made of DEEC-Tec metamaterials. DEEC-Tec-based wave energy converters have two defining characteristics:
NREL has extensive experience in developing materials for both FMDEC structures and embedded distributed energy converters. This experience, to name of few, leverages techniques ranging from upcycling of used polymers to the development of novel new elastomer electrodes.
NREL is familiar with and has the experience necessary for the co-design of DEEC-Tec-based ocean wave energy converters. Inherent in their nature, DEEC-Tec-based converters require the co-design and concurrent engineering of, at minimum:
This free online file converter lets you convert media easy and fast from one format to another. We support a lot of different source formats, just try. If you can't find the conversion you need, please let us know and write us an e-mail. We probably can help you...
In the String Formatting article, you saw how you can use the StringFormat property of a data binding to convert any type into a string. For other types of conversions, you need to write some specialized code in a class that implements the IValueConverter interface. (The Universal Windows Platform contains a similar class named IValueConverter in the Windows.UI.Xaml.Data namespace, but this IValueConverter is in the Xamarin.Forms namespace.) Classes that implement IValueConverter are called value converters, but they are also often referred to as binding converters or binding value converters.
The Enable Buttons page in the Data Binding Demos sample demonstrates how to use this value converter in a data binding. The IntToBoolConverter is instantiated in the page's resource dictionary. It is then referenced with a StaticResource markup extension to set the Converter property in two data bindings. It is very common to share data converters among multiple data bindings on the page:
The Enable Buttons page demonstrates a common need when a Button performs an operation based on text that the user types into an Entry view. If nothing has been typed into the Entry, the Button should be disabled. Each Button contains a data binding on its IsEnabled property. The data-binding source is the Length property of the Text property of the corresponding Entry. If that Length property is not 0, the value converter returns true and the Button is enabled:
Some value converters are written specifically for particular applications, while others are generalized. If you know that a value converter will only be used in OneWay bindings, then the ConvertBack method can simply return null.
You can write value converters to be more generalized and to accept several different types of data. The Convert and ConvertBack methods can use the as or is operators with the value parameter, or can call GetType on that parameter to determine its type, and then do something appropriate. The expected type of each method's return value is given by the targetType parameter. Sometimes, value converters are used with data bindings of different target types; the value converter can use the targetType argument to perform a conversion for the correct type.
The Switch Indicators page demonstrates how it can be used to display the value of a Switch view. Although it's common to instantiate value converters as resources in a resource dictionary, this page demonstrates an alternative: Each value converter is instantiated between Binding.Converter property-element tags. The x:TypeArguments indicates the generic argument, and TrueObject and FalseObject are both set to objects of that type:
The Binding class defines a ConverterParameter property, and the Binding markup extension also defines a ConverterParameter property. If this property is set, then the value is passed to the Convert and ConvertBack methods as the parameter argument. Even if the instance of the value converter is shared among several data bindings, the ConverterParameter can be different to perform somewhat different conversions.
To display these as hexadecimal values in XAML, they must be multiplied by 255, converted to an integer, and then formatted with a specification of "X2" in the StringFormat property. The first two tasks (multiplying by 255 and converting to an integer) can be handled by the value converter. To make the value converter as generalized as possible, the multiplication factor can be specified with the ConverterParameter property, which means that it enters the Convert and ConvertBack methods as the parameter argument:
The Convert converts from a double to int while multiplying by the parameter value; the ConvertBack divides the integer value argument by parameter and returns a double result. (In the program shown below, the value converter is used only in connection with string formatting, so ConvertBack is not used.)
Dear Shawn,
Thank you very much for the response These are the equations I have used to compute for my RLC and duty cycle to be in CCM. Sorry that I forgot to mention that my boost converter is operating in CCM. Below are the provided Transient Response of the Inductor current with the PWM.
Your first equation ignores all the parasitic elements in the converter. Hence, I am concerned you may expect performance that is not consistent with your expected performance. Thank you for your added waveforms. I took some time to analyze your waveforms and computed what I expect ts output voltage may be. The value I get when I estimate voltage drops for your two switching transistors (vds) and for your inductor real part (rs) is quite close to what you are observing. I then optimized the duty cycle to provide a n output voltage of 2.50 V. I included the equations I used. I also double-checked my result using an on-line tool. I included its result and the link in the attached note. I hope this is useful!
The alternating case converter will allow you to transform your text (no matter the current format) into text that alternates between lower case and upper case. It will generate a capital letter and then a lower case letter within the same word.
A catalytic converter is an emissions control device that is installed into the exhaust system on vehicles powered by an internal combustion engine. Catalytic converters reduce toxic pollutants by chemically converting carbon monoxide, unburned hydrocarbons, and oxides of nitrogen into harmless compounds.
The California Air Resources Board issues Executive Orders that exempt specific catalytic converters from anti-tampering regulations and laws. This exemption allows "exempted" (approved) catalytic converters to be used in California and in states that have adopted regulations in Title 13, California Code of Regulations, Section 2222.
A new aftermarket catalytic converter may be installed when the vehicle is beyond its emissions warranty period and a legitimate need for replacement has been established. New vehicles are covered under the federal emissions warranty of 8 years or 80,000 miles and 15 years or 150,000 miles for partial zero emission vehicles (PZEV), whichever comes first. A legitimate need for replacement may be established through the vehicle emissions inspection program. Non-I/M-program-related reasons for replacement may include damage resulting from vehicle accidents, cracked or melted substrate, or converter malfunctions.
If the vehicle is still under the emissions warranty, an OEM catalytic converter must be installed. Aftermarket catalytic converters may only be installed on vehicles beyond the emissions warranty period. You can verify the vehicle's warranty by checking the vehicle owner's manual or warranty booklet, or by contacting an OEM dealership and providing your vehicle identification number (VIN). The vehicle's model year and odometer reading can then be compared to the warranty period and covered mileage.
There may be instances where a CARB certified aftermarket catalytic converter is not available for a particular vehicle model. In these limited instances, the only option may be an OEM replacement part.
There may also be cases where neither a CARB certified aftermarket catalytic converter or OEM replacement catalytic converter is available for a particular vehicle model. This would occur where there are no longer any OEM replacement catalytic converters available (e.g., the make was discontinued), and none of the aftermarket catalytic converter manufacturers has received a CARB Executive Order. Contact CDPHE at (888) 861-2646 as there may be a suitable replacement option for a similar vehicle application.
If the vehicle requires a CARB-certified catalytic converter, there are several ways to determine the correct catalytic converter to install on a vehicle. The first point of reference should be the catalog provided by the aftermarket catalytic converter manufacturer. Aftermarket catalytic converter manufacturers have printed and electronic versions of their product application guides for converters that have been approved by both California and Colorado. These application guides include the part number, make, model, model year, engine family, and engine displacement/test group.
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