Generalized Wenzel equation for contact angle of droplets on spherical rough solid substrates

Applying Gibbs’ concept of dividing surface and dividing line, the wetting of spherical droplets on spherical rough solid substrates was studied by methods of thermodynamics. Considering the influences of line tension, a generalized Wenzel’s equation for contact angle between droplets and spherical rough solid substrates is derived. Under some assumptions, this generalized Wenzel’s equation reduces to Rusanov’s equation

Study on the scope that subway engineering influence the price of peripheral real estate

AbstractAccording to the problem that in what scope can subway engineering influence the prices of peripheral real estate, this paper summarized the problems in similar research presented, and put forward that the influence is taken by factors of person, and the influence can be studied by the probability of choosing subway. Different from other similar research, based on the analysis of the factors which can influence people choose subway or not, this paper constructs the logistic model. Testing the model by using the research data of Beijing, this paper get the list on which we know in what scope can subway engineering influence the surrounding real estate prices by adjusting the logistic model variable X4. Finally, discussed the model applicability and in different cities to application

Derivation of generalized Young’s equation for cylindrical droplets between the outer surfaces of two tangent cylinders

The wetting properties of cylindrical droplets between the outer surfaces of two tangent cylinders are investigated by means of thermodynamics. For the three-phase system containing solid, liquid and vapor phases, a generalized Young equation for contact angles of cylindrical drops between the outer surfaces of two tangent cylinders has been thermodynamically derived. In fact, the theoretical foundation of the derived generalized Young’s equation is based on Gibbs’s capillary phenomena and the method of Rusanov’s dividing line

Bis{2-[bis­(3,5-dimethyl-1H-pyrazol-1-yl-κN 2)meth­yl]pyridine-κN}cobalt(II) dinitrate

The central CoII ion in the title complex, [Co(C16H19N5)2](NO3)2, is located on a twofold rotation axis and has a slightly distorted octa­hedral coordination sphere. It is bonded to six N atoms from two 2-[bis­(3,5-dimethyl-1H-pyrazol-1-yl)meth­yl]pyridine ligands. In the crystal, mol­ecules are linked by weak C—H⋯O inter­actions