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Pwm Amp
PWM may refer to: Science and technology * Position weight matrix, a representation in motifs in biological sequences * Pulse-width modulation, a technique for controlling the average power delivered by an electrical signal * PWM (window manager), a Unix-based X window manager Other uses * ''Panzerwurfmine'', a type of German anti-tank hand grenade * Portland International Jetport, an airport in the U.S. * ''Professional Wealth Management ''Professional Wealth Management'' (''PWM'') is a magazine about European wealth management. It is published by the Financial Times group. ''PWM'' focuses on open and guided architecture and distribution of third party products by institutions a ...'', a financial magazine * Permanent Way Machine, the British Rail Class 97/6 locomotives * Polskie Wydawnictwo Muzyczne, the Polish Music Publishing House {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Position Weight Matrix
A position weight matrix (PWM), also known as a position-specific weight matrix (PSWM) or position-specific scoring matrix (PSSM), is a commonly used representation of motifs (patterns) in biological sequences. PWMs are often derived from a set of aligned sequences that are thought to be functionally related and have become an important part of many software tools for computational motif discovery. Background Creation Conversion of sequence to position probability matrix A PWM has one row for each symbol of the alphabet (4 rows for nucleotides in DNA sequences or 20 rows for amino acids in protein sequences) and one column for each position in the pattern. In the first step in constructing a PWM, a basic position frequency matrix (PFM) is created by counting the occurrences of each nucleotide at each position. From the PFM, a position probability matrix (PPM) can now be created by dividing that former nucleotide count at each position by the number of sequences, thereb ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pulse-width Modulation
Pulse-width modulation (PWM), or pulse-duration modulation (PDM), is a method of reducing the average power delivered by an electrical signal, by effectively chopping it up into discrete parts. The average value of voltage (and current) fed to the load is controlled by turning the switch between supply and load on and off at a fast rate. The longer the switch is on compared to the off periods, the higher the total power supplied to the load. Along with maximum power point tracking (MPPT), it is one of the primary methods of reducing the output of solar panels to that which can be utilized by a battery. PWM is particularly suited for running inertial loads such as motors, which are not as easily affected by this discrete switching, because their inertia causes them to react slowly. The PWM switching frequency has to be high enough not to affect the load, which is to say that the resultant waveform perceived by the load must be as smooth as possible. The rate (or frequency) a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
PWM (window Manager)
In Unix computing, Ion is a tiling and tabbing window manager for the X Window System. It is designed such that it is possible to manage windows using only a keyboard, without needing a mouse. It is the successor of PWM and is written by the same author, Tuomo Valkonen. Since the first release of Ion in the summer 2000, similar alternative window management ideas have begun to show in other new window managers: Larswm, ratpoison, StumpWM, wmii, xmonad and dwm. First versions of Ion were released under the Artistic License, Ion2 and the development versions of Ion3 were released under the GNU Lesser General Public License (LGPL). However, the first release candidate of Ion3 included a license change to a custom license based on the LGPL (specifically modified versions must not use the name ion). Since version 2, Ion has been scriptable in Lua. As of September 17, 2009, Valkonen states he is unlikely to continue development of Ion by himself. The official home page went off-l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Panzerwurfmine
The ''Panzerwurfmine'' (abbreviated to PWM) was a shaped charge hand-thrown anti-tank grenade used by ''Luftwaffe'' ground troops in World War II. Appearance The ''Panzerwurfmines appearance owed much to the ''Panzerfaust'' (specifically its warhead), which was of similar construction and operation. The major difference was that the PWM had a tube attached to the charge, running behind it, with some form of stabilising fins or canvas attached to the rear of the tube. Premise For any high-explosive anti-tank mine or grenade to be effective against armour, it must sit squarely on to the armour, so that the high-velocity jet of metal punches through the armour at a ninety degree angle. A way of making sure this happens is to place the charge onto the armour by hand. However, this puts the participant into grave danger from defensive fire from the tank and other enemies. A thrown version would be more versatile, but it would be hard to ensure the ninety degree angle. The ''Panzerwurf ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Portland International Jetport
Portland International Jetport is a public airport two miles (3 km) west of downtown Portland, Maine, United States. It is owned and operated by the City of Portland. A portion of the Jetport's property, including the main runway, is located within the neighboring city of South Portland. PWM covers 726 acres (293 ha) of land. The airport is the busiest in the state. In 2018, the jetport handled more than two million passengers for the first time, breaking the previous record of 1.86 million set in 2017. The Jetport has benefited from service by low-cost carriers such as Southwest Airlines and JetBlue, as well as Portland's increased popularity as a tourist destination. A survey conducted in June 2011 found PWM to be the most affordable airport in the region, and the third most affordable in New England. In October 2011, PWM completed a $75 million renovation and expansion of its terminal to allow more airline service and more amenities for passengers. In 2020, PWM rece ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Professional Wealth Management
''Professional Wealth Management'' (''PWM'') is a magazine about European wealth management. It is published by the Financial Times group. ''PWM'' focuses on open and guided architecture and distribution of third party products by institutions across Europe. It also covers sub-advisory business matters. It also has a dedicated online section called PWM Asia which focuses on the latest developments in the Asian wealth management industry. ''PWM'' conducts the annual Global Private Banking Awards every November, with Citi Private Bank winning the overall award in 2012 and UBS Wealth Management UBS Group AG is a multinational Investment banking, investment bank and financial services company founded and based in Switzerland. Co-headquartered in the cities of Zürich and Basel, it maintains a presence in all major financial centres ... winning the overall award in 2013. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
British Rail Class 97/6
The British Rail Class 97/6 0-6-0 diesel shunting locomotives were purpose-built for departmental duties by Ruston & Hornsby at Lincoln in 1953 (97650) or 1959 (97651-654). There are minor technical differences between 97650 and the 1959 batch. This class of five locomotives is outwardly similar to the Class 04 locomotives built around the same time but, internally, they are quite different. The Class 97/6 is diesel-electric while the Class 04 is diesel-mechanical. The class 97/6 is related to the older British Rail Class D1/3, which was a 0-4-0 Diesel Mechanical version of the Ruston & Hornsby 165DE. Overview left, PWM651 at Radyr, c. 1977. The fleet was originally numbered PWM650-654 in the Western Region Permanent Way Machines series, hence were commonly referred to as the “PWM shunters” or simply “PWMs”. Between 1979 and 1981 they were renumbered as Class 97 locomotives. Originally painted in BR Green livery, this was later superseded by BR Blue and fina ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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