Multistage Sampling

	Multistage Sampling Multistage may refer to: * Armitage–Doll multistage model of carcinogenesis * Multistage amplifiers * Centrifugal pump, Multistage centrifugal pump * Multi-stage flash distillation * Multistage interconnection networks * Multistage rocket * Multistage sampling * Multistage testing {{dab ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Armitage–Doll Multistage Model Of Carcinogenesis The Armitage–Doll model is a statistical model of carcinogenesis, proposed in 1954 by Peter Armitage (statistician), Peter Armitage and Richard Doll, in which a series of discrete mutations result in cancer.Armitage, P. and Doll, R. (1954"The Age Distribution of Cancer and a Multi-Stage Theory Of Carcinogenesis" ''British Journ. of Cancer'', 8 (1), 1-12. Reprinted (2004)reprint ''British Journal of Cancer'', 91, 1983–1989. The original paper has recently been reprinted with a set of commentary articles. The model The rate of incidence and mortality from a wide variety of common cancers follows a power law: someone's risk of developing a cancer increases with a power of their age. The model is very simple, and reads \mathrm = \frac t^ in Ashley's notation.Ashley, D. J. B., Brit. J. Cancer, 23, 313 (1969) Their interpretation was that a series of r mutations were required to initiate a tumour. This is now widely accepted, and part of the mainstream view of carcinogenesi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Multistage Amplifiers A multistage amplifier is an electronic amplifier consisting of two or more single-stage amplifiers connected together. In this context, a single stage is an amplifier containing only a single transistor (sometimes a pair of transistors) or other active device. The most common reason for using multiple stages is to increase the gain of the amplifier in applications where the input signal is very small, for instance in radio receivers. In these applications a single stage has insufficient gain by itself. In some designs it is possible to obtain more desirable values of other parameters such as input resistance and output resistance. Connection schemes The simplest, and most common, connection scheme is a cascade connection of identical, or similar, stages forming a cascade amplifier. In a cascade connection, the output port of one stage is connected to the input port of the next. Typically, the individual stages are bipolar junction transistors (BJTs) in a common em ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Centrifugal Pump Centrifugal pumps are used to transport fluids by the Energy transformation, conversion of rotational kinetic energy to the hydrodynamic energy of the fluid flow. The rotational energy typically comes from an engine or electric motor. They are a sub-class of dynamic axisymmetric work-absorbing turbomachinery. The fluid enters the pump impeller along or near to the rotating axis and is accelerated by the impeller, flowing radially outward into a diffuser or Volute (pump), volute chamber (casing), from which it exits. Common uses include water, sewage, agriculture, petroleum, and petrochemical pumping. Centrifugal pumps are often chosen for their high flow rate capabilities, abrasive solution compatibility, mixing potential, as well as their relatively simple engineering. A centrifugal fan is commonly used to implement an Air handler, air handling unit or vacuum cleaner. The reverse function of the centrifugal pump is a water turbine converting potential energy of water ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Multi-stage Flash Distillation Multi-stage flash distillation (MSF) is a water desalination process that distills sea water by flashing a portion of the water into steam in multiple stages of what are essentially countercurrent heat exchangers. Current MSF facilities may have as many as 30 stages. Multi-stage flash distillation plants produce about 26% of all desalinated water in the world, but almost all of new desalination plants currently use reverse osmosis due to much lower energy consumption. Principle The plant has a series of spaces called stages, each containing a heat exchanger and a condensate collector. The sequence has a cold end and a hot end while intermediate stages have intermediate temperatures. The stages have different pressures corresponding to the boiling points of water at the stage temperatures. After the hot end there is a container called the brine heater. The process goes through the following steps: # When the plant is operating in steady state, feed water at the cold inl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Multistage Interconnection Networks Multistage interconnection networks (MINs) are a class of high-speed computer networks usually composed of Central processing unit, processing elements (PEs) on one end of the network and computer memory, memory elements (MEs) on the other end, connected by network switch, switching elements (SEs). The switching elements themselves are usually connected to each other in stages, hence the name. MINs are typically used in high-performance or parallel computing as a low-network latency, latency interconnection (as opposed to traditional packet switching networks), though they could be implemented on top of a packet switching network. Though the network is typically used for routing purposes, it could also be used as a co-processor to the actual processors for such uses as sorting; Circular shift, cyclic shifting, as in a Faro shuffle, perfect shuffle network; and bitonic sorting. Background Interconnection network are used to connect nodes, where nodes can be a single processor or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Multistage Rocket A multistage rocket or step rocket is a launch vehicle that uses two or more rocket ''stages'', each of which contains its own engines and propellant. A ''tandem'' or ''serial'' stage is mounted on top of another stage; a ''parallel'' stage is attached alongside another stage. The result is effectively two or more rockets stacked on top of or attached next to each other. Two-stage rockets are quite common, but rockets with as many as five separate stages have been successfully launched. By jettisoning stages when they run out of propellant, the mass of the remaining rocket is decreased. Each successive stage can also be optimized for its specific operating conditions, such as decreased atmospheric pressure at higher altitudes. This ''staging'' allows the thrust of the remaining stages to more easily accelerate the rocket to its final velocity and height. In serial or tandem staging schemes, the first stage is at the bottom and is usually the largest, the second stage and subse ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Multistage Sampling Multistage may refer to: * Armitage–Doll multistage model of carcinogenesis * Multistage amplifiers * Centrifugal pump, Multistage centrifugal pump * Multi-stage flash distillation * Multistage interconnection networks * Multistage rocket * Multistage sampling * Multistage testing {{dab ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]