Search results
Results from the WOW.Com Content Network
1.0.8348 11 September 2022: Free Creative Commons Attribution-NoDerivs (CC-BY-ND) Mathematical notebook program, similar to Mathcad, with support for Plugins (e.g. Maxima plugin available) Sysquake: Calerga: 1998 6.5 December 2019: free, $2500 (Pro, commercial), $1000 (Pro, academic) Proprietary: interactive graphics TK Solver
Given a system transforming a set of inputs to output values, described by a mathematical function f, optimization refers to the generation and selection of the best solution from some set of available alternatives, [1] by systematically choosing input values from within an allowed set, computing the value of the function, and recording the best value found during the process.
The α phase has one third of the electrical resistivity [29] and a much lower superconducting transition temperature T C relative to the β phase: ca. 0.015 K vs. 1–4 K; mixing the two phases allows obtaining intermediate T C values. [30] [31] The T C value can also be raised by alloying tungsten with another metal (e.g. 7.9 K for W-Tc). [32]
Palm's Tungsten E was the cheapest of the Tungsten series, and as such, has been one of the most successful. [citation needed] It has 32 megabytes of memory, a Texas Instruments OMAP (ARM) 126 MHz processor, a 2 + 1 ⁄ 8-by-2 + 1 ⁄ 8-inch (54 mm × 54 mm) transreflective TFT screen, and ran Palm OS 5.2.1.
Help; Learn to edit; Community portal; Recent changes; Upload file; Special pages
Wolframite is an iron, manganese, and tungstate mineral with a chemical formula of (Fe,Mn)WO 4 that is the intermediate mineral between ferberite (Fe 2+ rich) and hübnerite (Mn 2+ rich). [4] Along with scheelite , the wolframite series are the most important tungsten ore minerals.
Tungsten(VI) oxytetrachloride is the inorganic compound with the formula W O Cl 4. This diamagnetic solid is used to prepare other complexes of tungsten. The red crystalline compound is soluble in nonpolar solvents but it reacts with alcohols and water and forms adducts with Lewis bases.
Scheelite is a calcium tungstate mineral with the chemical formula Ca W O 4. It is an important ore of tungsten (wolfram). Scheelite is originally named after Swedish chemist Carl Wilhelm Scheele (1742–1786). Well-formed crystals are sought by collectors and are occasionally fashioned into gemstones when suitably free of flaws.