Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Cone conditioning

This method has been found to reduce the overall computational effort in approaching the optimum by up to 30% compared to that obtained by accepting the first point satisfying an Armijo cone condition on the merit function while allowing step reductions of up to a factor of 10 at each line search iteration and using a quadratic interpolation formula to estimate the step reduction. [Pg.341]

CONE Conditions for a spinning cone DISK Conditions for a spinning disk... [Pg.2857]

FIGURE 4.4 The effect of column length on peak resolution. Nominal column lengths (a) 50-m, (b) 25-m, (c) 12-m, (d) 5-m, and (e) 2.5-m, 0.25-mm i.d., 0.25-p,m methylsili-cone. Conditions helium carrier gas, 100°C oven, split injection, FID detection. Peak identification (a) n-nonane, (b) 2-octanone, (c) n-decane, (d) 1-octanol, (e) 2,6-dimethylphenol, (f) n-undecane, (g) 2,4-dimethylanaline, (h) naphthalene, (i) n-dodecane. [Reprinted from LC/GC Magazine with permission of Advanstar Publications (5).]... [Pg.203]

Figure 95. Section of a thin wall mediating the change in chevron direction. The layers in the chevron structure make the angle 5 (the chevron angle) with the normal to the glass plates. Along a chevron fold where two surfaces meet, two cone conditions have to be satisfied simultaneously for n, which can be switched between two states. At the two points of the lozenge where three surfaces meet, three conditions have to be satisfied and n is then pinned, thus cannot be switched. Figure 95. Section of a thin wall mediating the change in chevron direction. The layers in the chevron structure make the angle 5 (the chevron angle) with the normal to the glass plates. Along a chevron fold where two surfaces meet, two cone conditions have to be satisfied simultaneously for n, which can be switched between two states. At the two points of the lozenge where three surfaces meet, three conditions have to be satisfied and n is then pinned, thus cannot be switched.
In their first analysis of C1 and C2 structures, Kanbe et al. [ 170] put forward the essential criteria for their stability. Both are allowed at low pretilt a. Whereas C1 can exist at high pretilts, the cone condition (n must be on the cone) cannot be fulfilled for C2 if oris larger than (6-S), as illustrated in... [Pg.1664]

The total amount or the concentration of iodine (ITI cone) conditions overall thyroid function. This has repeatedly been shown directly in vivo in animal studies as well as in vitro, i.e. in cultured animal and human thyroid slices. Indirect evidence has been observed in vivo in man... [Pg.100]

Figure 9.8 The effect of cone conditioning for a 1 ppb spike of the analytes shown in borehole water containing approximately 80 ppm Ca, 30 ppm Na, Mg and 5 ppm K - cone run from clean. Figure 9.8 The effect of cone conditioning for a 1 ppb spike of the analytes shown in borehole water containing approximately 80 ppm Ca, 30 ppm Na, Mg and 5 ppm K - cone run from clean.
The advantage of this technique is that it produces accurate correction factors that take mass bias into account. The disadvantages are that the factor may change from day to day and with cone conditioning and that extra solutions must be analysed in order to calculate the factor. [Pg.430]

The most widely used reactions are those of electrophilic substitution, and under controlled conditions a maximum of three substituting groups, e.g. -NO2 (in the 1,3,5 positions) can be introduced by a nitric acid/sul-phuric acid mixture. Hot cone, sulphuric acid gives sulphonalion whilst halogens and a Lewis acid catalyst allow, e.g., chlorination or brom-ination. Other methods are required for introducing fluorine and iodine atoms. Benzene undergoes the Friedel-Crafts reaction. ... [Pg.55]

Restrictions for a curve of source movement reffer to as a completeness condition. This condition determines whether the information that is contained within some geometry of cone vertices is enough to perform an artifact-free reconstruction. [Pg.218]

Smith B.D. Image reconstruction from cone-beam projections necessary and sufficient conditions and reconstruction methods., IEEE Trans. Med. Imaging, V. 4, 1985, p. 14-28. [Pg.220]

Another efficient and practical method for exact 3D-reconstruction is the Grangeat algorithm [11]. First the derivative of the three-dimensional Radon transfomi is computed from the Cone-Beam projections. Afterwards the 3D-Object is reconstructed from the derivative of the Radon transform. At present time this method is not available for spiral orbits, instead two perpendicular circular trajectories are suitable to meet the above sufficiency condition. [Pg.494]

The equation of restriction can embody causality, lower boundedness of energies in the spectrum, positive wavenumber in the outgoing wave (all these in nonrelativistic physics) and interactions inside the light cone only, conditions of mass speciality, and so on in relativistic physics. In the case of interest in this... [Pg.111]

Technetium is a silvery-gray metal that tarnishes slowly in moist air. The common oxidation states of technetium are +7, +5, and +4. Under oxidizing conditions technetium (Vll) will exist as the pertechnetate ion, TcOr-. The chemistry of technetium is said to be similar to that of rhenium. Technetium dissolves in nitric acid, aqua regia, and cone, sulfuric acid, but is not soluble in hydrochloric acid of any strength. The element is a remarkable corrosion inhibitor for steel. The metal is an excellent superconductor at IIK and below. [Pg.107]

Materials and Reactions. Candle systems vary in mechanical design and shape but contain the same genetic components (Fig. 1). The candle mass contains a cone of material high in iron which initiates reaction of the soHd chlorate composite. Reaction of the cone material is started by a flash powder train fired by a spring-actuated hammer against a primer. An electrically heated wire has also been used. The candle is wrapped in insulation and held in an outer housing that is equipped with a gas exit port and rehef valve. Other elements of the assembly include gas-conditioning filters and chemicals and supports for vibration and shock resistance (4). [Pg.484]

Tank Bottoms. The shape of cylindrical tank closures, both top and bottom, is a strong function of the internal pressure. Because of the varying conditions to which a tank bottom may be subjected, several types of tank bottoms (Fig. 7 Table 4) have evolved. These may be broadly classified as flat bottom, conical, or domed or spherical. Flat-bottom tanks only appear flat. These usually have designed slope and shape and are subclassifted according to the following flat, cone up, cone down, or single slope. [Pg.314]


See other pages where Cone conditioning is mentioned: [Pg.374]    [Pg.374]    [Pg.22]    [Pg.518]    [Pg.520]    [Pg.1565]    [Pg.1653]    [Pg.1666]    [Pg.63]    [Pg.374]    [Pg.374]    [Pg.22]    [Pg.518]    [Pg.520]    [Pg.1565]    [Pg.1653]    [Pg.1666]    [Pg.63]    [Pg.45]    [Pg.189]    [Pg.189]    [Pg.360]    [Pg.585]    [Pg.162]    [Pg.56]    [Pg.770]    [Pg.60]    [Pg.362]    [Pg.302]    [Pg.547]    [Pg.165]    [Pg.512]    [Pg.56]    [Pg.156]    [Pg.16]    [Pg.188]    [Pg.438]    [Pg.157]    [Pg.313]    [Pg.358]    [Pg.513]    [Pg.513]   
See also in sourсe #XX -- [ Pg.414 , Pg.424 ]




SEARCH



© 2024 chempedia.info