Translation for 'biconvex' from English to Russian

biconvex

двояковыпуклый {adj}оптика

• "Terebratula" species have biconvex egg-shaped shells, anterior margins of the valves have two small folds, concentric growth lines are quite thin or nearly absent.
• Shells of the type genus "Aulatornoceras" are involute, widely to narrowly umbilicate, with strongly biconvex growth lines. The suture is goniatitic.
• Tornoceratids are subdiscoidal goniatitids with biconvex growth lines and sutures that form 6 to 10 lobes, the ventral one undivided, the lateral ones originating as subdivisions of external and internal lateral saddle.
• One type is a symmetrical design consisting of four air spaced lenses: the outer pair is biconvex and the inner pair is biconcave.
• It has two biconvex lenses on the outer and a biconcave lens in the middle.

• "Aphantites" is a Lower Pennsylvanian ammonite belonging to the goniatitid family Reticuloceratidae which are characterized by involute subdiscoidal shells covered by linear or biconvex growth lines that may be crossed by longitudinal lirae, producing a reticulate pattern.
• In the remaining parts of the treatise, Ibn Sahl dealt with parabolic mirrors, ellipsoidal mirrors, biconvex lenses, and techniques for drawing hyperbolic arcs.
• When divided horizontally, it exhibits, to some extent, the appearance of a biconvex lens, while a coronal section of its central part presents a somewhat triangular outline.
• The fruit is a greyish white nutlet. It is biconvex with deep, wavy ridges.
• "Mucrospirifer mucronatus" typically has a biconvex shell.

• The shell is thick and biconvex. The left valve is slightly more convex than the right one.
• Its shell is biconvex, rounded pentagonal in profile, and dependent on the species scarlet with creamy white radiating stripes of quickly varying width, beige or seldom entirely white.
• Biconvex optimization is a generalization of convex optimization where the objective function and the constraint set can be biconvex.
• "Discorbis" produces a smooth plano-convex to unequally biconvex trochospiral test (shell) with a flattened umbilical side, taking up about two and a half whorls, with seven to ten chambers in the final whorl.
• The shells are generally biconvex, with equal valves round in outline, and slightly longer than wide.

• The shell of "Phoenixites" is discoidal, on which constrictions may be present. Growth lines are strongly biconvex in juvenile stages, later with shallow a lateral sinus.
• "Athyris" is a brachiopod genus with a subequally biconvex shell that is generally wider than long and a range that extends from the Silurian into the Triassic.
• Convexity over "V" is defined analogously. A bipartite graph ("U" ∪ "V", "E") that is convex over both "U" and "V" is said to be biconvex or doubly convex.
• There is even doubt as to whether the biconvex shape of the mid-limbs is due to poor preservation in the bogs.