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Price–sales ratio, P/S ratio, or PSR, is a valuation metric for stocks. It is calculated by dividing the company's market capitalization by the revenue in the most recent year; or, equivalently, divide the per-share price by the per-share revenue. The justified P/S ratio is calculated as the price-to-sales ratio based on the Gordon Growth Model.
The price-to-book ratio (P/B) is a commonly used benchmark comparing market value to the accounting book value of the firm's assets. The price/sales ratio and EV/sales ratios measure value relative to sales. These multiples must be used with caution as both sales and book values are less likely to be value drivers than earnings.
Astronaut training describes the complex process of preparing astronauts in regions around the world for their space missions before, during and after the flight, which includes medical tests, [2] physical training, [3] extra-vehicular activity (EVA) training, wilderness survival training , water survival training , robotics training ...
A multistage rocket or step rocket[ 1] 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 ...
Rate-determining step. In chemical kinetics, the overall rate of a reaction is often approximately determined by the slowest step, known as the rate-determining step ( RDS or RD-step[ 1] or r/d step[ 2][ 3]) or rate-limiting step. For a given reaction mechanism, the prediction of the corresponding rate equation (for comparison with the ...
Simplex algorithm. In mathematical optimization, Dantzig 's simplex algorithm (or simplex method) is a popular algorithm for linear programming. [ 1] The name of the algorithm is derived from the concept of a simplex and was suggested by T. S. Motzkin. [ 2] Simplices are not actually used in the method, but one interpretation of it is that it ...
v. t. e. Fundamental analysis, in accounting and finance, is the analysis of a business's financial statements (usually to analyze the business's assets, liabilities, and earnings ); health; [ 1] competitors and markets. It also considers the overall state of the economy and factors including interest rates, production, earnings, employment ...
t. e. Proximal policy optimization (PPO) is an algorithm in the field of reinforcement learning that trains a computer agent's decision function to accomplish difficult tasks. PPO was developed by John Schulman in 2017, [ 1] and had become the default reinforcement learning algorithm at American artificial intelligence company OpenAI. [ 2]