The ratio of signal dynamic range (such as 2:1, 4:1 or 8:1) measured at the input and output of a compressor above the set threshold point.
That between the volume of fuel mixture before and after being compressed by the Compression Stroke.
A comparison of the amount of space saved by data compression. A compression ratio of 2:1 ("two to one") results in a doubling of the storage capacity.
This is a numeric amount which represents the amount that the intake fuel/air charge is compressed, during the compression stroke ( 7.5:1), as compared to the ambient air pressure (7.5:). As a general rule, the higher the compression; the more horse power and heat is created.
The size of the original image divided by the size of the compressed image, measuring the degree to which a compression routine can reduce the size of a file.
The expression for the difference between the enclosed volume left above the piston when it has reached its lowest position of travel, and the volume of the combustion chamber when the piston has arrived at its highest position.
Ration of the volume in an engine's cylinder above the piston at bottom dead center to the volume above the piston at top dead center.
The ratio of the total volume enclosed in a cylinder when the piston is located at BDC compared to the volume enclosed when the piston is at TDC (volume at TDC is called the combustion space volume). The formula to calculate compression ratio is: (Swept Cylinder Volume + Combustion Space Volume)/Combustion Space Volume = Compression Ratio.
The relationship between cylinder volume when the piston is at top dead centre and cylinder volume when the piston is at bottom dead centre.
a measure of how much the engine compresses the air/gasoline mixture before the mixture ignites to produce power. The higher the compression ratio, the greater the power. A low compression engine might have a CR (compression ratio) of 7:1, while a high CR might be 11:1.
The amount of file size compression expressed in relation to the original or uncompressed file. Compression can also be expressed as a % of the original size as seen in ZIP programs.
The ratio determined by dividing the discharge pressure, in PSI, by the suction pressure in PSI.
The volume of the combustion chamber and cylinder when the piston is at the bottom of its stroke, divided by the volume of the combustion chamber and cylinder when the pistion is at the top of its stroke. Higher compression ratios tend to increase engine effciency.
The percentage of compression of the original data file. The larger the compression ratio, the more information that's lost during the compression and decompression steps.
The ration of the total volume of a cylinder and combustion chamber, with the piston at bottom dead center, to the volume of the combustion chamber with the piston at top dead center.
The ratio of the cylinder volume with the piston at bottom dead center (BDC) to the cylinder volume with the piston at top dead center (TDC).
Relationship between the cylinder volume when the piston is at the top of the stroke and the volume when it is at the bottom of the stroke. For instance, a compression ratio of 9:1 means the piston has compressed the air/fuel mixture into a space that is nine times smaller than it would normally utilize.
A high compression ratio is generally synonymous with a powerful modern engine. E.g.: 7.9 for a Royal Enfield Electra, 12.65 for a Triumph 675 Daytona
The ratio of the volume of the loose powder to the volume of the compact made from it. Synonymous with Fill Ratio.
Amount that the air/fuel mixture is compressed as the piston reaches the top of the bore. The higher the compression, the more the horsepower.
In image compression, the ratio of an uncompressed image data file size to its compressed counterpart.
The ratio of uncompressed to compressed files size. Theoretical limit of G4 compression is 20 to 1. Typical results vary based on the document type. 10-15 to 1 is common.
A term used to describe the amount by which the fuel/air mixture is compressed as a piston moves from the bottom to the top of its travel, and expressed as a number. For example an 8.5:1 compression ratio means that the volume of fuel/air mixture above the piston when the piston is at the bottom of its stroke is 8.5 times that when the piston is at the top of its stroke. ompression tester - A special type of pressure gauge which can be screwed into a spark plug hole, which measures the pressure in the cylinder when the engine is turning but not firing. This gives an indication of engine wear or possible leaks.
A measurement of how tightly the air-fuel mixture is compressed or squeezed within the cylinder by the piston. This can be determined by taking the total volume of the cylinder when the piston is at its lowest point (Bottom Dead Center, or BDC) and dividing it by the volume when the piston is at its highest point (Top Dead Center, or TDC). In general, higher compression ratios yield greater power.
A compression ratio, usually expressed as 5:1, refers to the size of the original data versus the size after compression. If data has been reduced to one-fifth the original size, the compression ratio is 5:1.
The ratio of a file's uncompressed size over its compressed size.
The ratio of the size of a compressed digital file to the original uncompressed digital file. Ratios between 15:1 and 8:1 are the most often used in digital cameras. Highest quality ratios are less than 5:1, non-lossy compression is 2:1 or less.
A measurement of the difference between cylinder volume at t.d.c. and b.d.c.
This is the ratio of the original size of data that is sent to the compressed size.
Ratio of max. cylinder volume to min. cylinder volume; throughout the package's documentation is means geometric compression ratio.
Comparison of file sizes between the uncompressed and compressed files.
The ratio of the amount of data in the original video compared to the amount of data in the compressed video. The higher the ratio the greater the compression.
The ratio between the combined volume of a cylinder and a combustion chamber when the piston is at the bottom of its stroke, and the volume when the piston is at the top of its stroke. The higher the compression ratio, the more mechanical energy an engine can squeeze from its air-fuel mixture. Higher compression ratios, however, also make detonation more likely.
The ratio of the number of original data bytes to the number of compressed data bytes.
The ratio of the volume between the piston and cylinder head when the piston is at the bottom of its stroke (bottom dead center) and when the piston is at the top of its stroke (top dead center).
The ratio of the uncompressed to compressed file size. Typical CCITT Group 4 compression ratios are 10 or 20 to 1.
Amount of trash processed by a trash compactor. A 4:1 ratio means that 4 bags of refuse are reduced to one bag of compacted trash.
The ratio of the file sizes of a compressed file to an uncompressed file, e.g., with a 20:1 compression ratio, an uncompressed file of 1MB is compressed to 50KB.
( slope) The ratio of signal dynamic range between the compressor... ( more)
The ratio between the two volume extremes of the combustion chamber. This cylinder's cubic volume is measured when the piston is at the top (Top Dead Center) and the bottom of its stroke. The higher this ratio, the higher the octane rating required by your engine to prevent pre-ignition (or engine knocking) under load.
The ratio of a cylinder's maximum volume (including the combustion chamber) to it's minimum volume. Maximum volume is achieved at the ends of the intake and power strokes; minimum volume at the ends of the compression and exhaust strokes. For greatest accuracy, deck height, any piston face contour, and the compressed thickness of the head gasket must all be factored into account.
The comparison of the total volume of the cylinder and combustion chamber with the piston at BDC and the piston at TDC.
In an extruder screw, the ratio of volume available in the first flight at the hopper to the last flight at the end of the screw.
The factor obtained by dividing the channel depth in the feed section of the screw by the channel depth in the meter section (or the depth of the last complete flight). This Channel Depth ration is commonly referred to as the Compression Ratio. In constant lead screws this value approximates, but is greater than the volumetric compression ratio.
A numerical ratio of cylinder volume with the piston at Bottom Dead Center versus cylinder volume with the piston at Top Dead Center.
The compression ratio is a single number that can be used to predict the performance of any engine (such as an internal-combustion engine or a Stirling Engine). It is a ratio between the volume of a combustion chamber and cylinder, when the piston is at the bottom of its stroke and the volume when the piston is at the top of its stroke. The higher the compression ratio, the more mechanical energy an engine can squeeze from its air-fuel mixture.