Changeset e53b881 in sasmodels
 Timestamp:
 Mar 26, 2019 12:47:02 PM (4 months ago)
 Branches:
 master, core_shell_microgels, magnetic_model, ticket1257vesicleproduct, ticket_1156, ticket_1265_superball, ticket_822_more_unit_tests
 Children:
 fca112d
 Parents:
 598a354
 Location:
 sasmodels/models
 Files:

 2 edited
Legend:
 Unmodified
 Added
 Removed

sasmodels/models/flexible_cylinder.py
r598a354 re53b881 33 33 and solvent respectively. 34 34 35 Our model uses the form factor calculations i mplemented in a clibrary provided36 by the NIST Center for Neutron Research (Kline, 2006). This states:35 Our model uses the form factor calculations in reference [1] as implemented in a 36 clibrary provided by the NIST Center for Neutron Research (Kline, 2006). This states: 37 37 38 38 'Method 3 With Excluded Volume' is used. … … 41 41 pseudocontinuous limit. 42 42 See equations (13,2627) in the original reference for the details. 43 44 **This is a model with complex behaviour depending on the ratio of** $L/b$ **and the 45 reader is strongly encouraged to read reference [1] before use.** 43 46 44 47 References 
sasmodels/models/flexible_cylinder_elliptical.py
r598a354 re53b881 4 4 The nonnegligible diameter of the cylinder is included by accounting 5 5 for excluded volume interactions within the walk of a single cylinder. 6 **Intercylinder interactions are NOT provided for.** 7 6 8 The form factor is normalized by the particle volume such that 7 9 … … 24 26  25 27 26 The function calculated in a similar way to that for the flexible_cylinder model 27 from the reference given below using the author's "Method 3 With Excluded Volume". 28 The function is calculated in a similar way to that for the 29 :ref:`flexiblecylinder` model in reference [1] below using the author's 30 "Method 3 With Excluded Volume". 31 28 32 The model is a parameterization of simulations of a discrete representation of 29 33 the wormlike chain model of Kratky and Porod applied in the pseudocontinuous … … 58 62 59 63 The cross section of the cylinder is elliptical, with minor radius $a$ . 60 The major radius is larger, so of course, **the axis ratio (parameter 5)must be64 The major radius is larger, so of course, **the axis_ratio must be 61 65 greater than one.** Simple constraints should be applied during curve fitting to 62 66 maintain this inequality. … … 67 71 these parameters must be held fixed during model fitting. 68 72 69 **No intercylinder interference effects are included in this calculation.** 73 **This is a model with complex behaviour depending on the ratio of** $L/b$ **and the 74 reader is strongly encouraged to read reference [1] before use.** 70 75 71 76 References
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