scholarly journals Characterization of the optimal solution for a class of hybrid systems

2001 ◽  
Author(s):  
B. Srinivasan ◽  
B. Sedghi ◽  
D. Bonvin
Keyword(s):  
Hybrid Systems ◽  
Optimal Solution

Morphological characterization of silica obtained by calcination of methacrylic and epoxy – silica hybrid systems

2016 ◽  
Author(s):  
F. Tescione ◽  
F. Lionetto ◽  
C. Esposito Corcione ◽  
G. G. Buonocore ◽  
R. Striani ◽  
...  
Keyword(s):  
Hybrid Systems ◽  
Morphological Characterization ◽  
Silica Hybrid

Surge Pricing and Its Spatial Supply Response

2020 ◽  
Author(s):  
Omar Besbes ◽  
Francisco Castro ◽  
Ilan Lobel
Keyword(s):  
Supply And Demand ◽  
Optimal Solution ◽  
Geographic Area ◽  
Equilibrium Constraints ◽  
Supply Response ◽  
Infinite Dimensional ◽  
Travel Costs ◽  
Spatial Decomposition ◽  
Local Characterization

We consider the pricing problem faced by a revenue-maximizing platform matching price-sensitive customers to flexible supply units within a geographic area. This can be interpreted as the problem faced in the short term by a ride-hailing platform. We propose a two-dimensional framework in which a platform selects prices for different locations and drivers respond by choosing where to relocate, in equilibrium, based on prices, travel costs, and driver congestion levels. The platform’s problem is an infinite-dimensional optimization problem with equilibrium constraints. We elucidate structural properties of supply equilibria and the corresponding utilities that emerge and establish a form of spatial decomposition, which allows us to localize the analysis to regions of movement. In turn, uncovering an appropriate knapsack structure to the platform’s problem, we establish a crisp local characterization of the optimal prices and the corresponding supply response. In the optimal solution, the platform applies different treatments to different locations. In some locations, prices are set so that supply and demand are perfectly matched; overcongestion is induced in other locations, and some less profitable locations are indirectly priced out. To obtain insights on the global structure of an optimal solution, we derive in quasi-closed form the optimal solution for a family of models characterized by a demand shock. The optimal solution, although better balancing supply and demand around the shock, quite interestingly also ends up inducing movement away from it. This paper was accepted by David Simchi-Levi, optimization.

scholarly journals In Situ Characterization of the Initial Effect of Water on Molecular Interactions at the Interface of Organic/Inorganic Hybrid Systems

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Sven Pletincx ◽  
Lena Trotochaud ◽  
Laura-Lynn Fockaert ◽  
Johannes M. C. Mol ◽  
Ashley R. Head ◽  
...  
Keyword(s):  
Hybrid Systems ◽  
Molecular Interactions ◽  
In Situ Characterization ◽  
Inorganic Hybrid ◽  
Effect Of Water ◽  
Initial Effect

Development and characterization of fast dissolving tablets of oxaprozin based on hybrid systems of the drug with cyclodextrins and nanoclays

2017 ◽  
Vol 531 (2) ◽  
pp. 640-649 ◽  
Author(s):  
Francesca Maestrelli ◽  
Paola Mura ◽  
Marzia Cirri ◽  
Natascia Mennini ◽  
Carla Ghelardini ◽  
...  
Keyword(s):  
Hybrid Systems

Synthesis and characterization of some new fluoroquinolone-barbiturate hybrid systems

2015 ◽  
Vol 70 (7) ◽  
pp. 513-517 ◽  
Author(s):  
Kamal Sweidan ◽  
Mustafa M. El-Abadelah ◽  
Salim F. Haddad ◽  
Wolfgang Voelter
Keyword(s):  
Oxygen Atom ◽  
Hybrid Systems ◽  
Solvent Molecule ◽  
Chloride Ion ◽  
Synthesis And Characterization ◽  
Methylene Carbon ◽  
Hybrid Molecules ◽  
Carbonyl Chloride

AbstractNew hybrid molecules containing fluoroquinolone-barbiturate moieties were synthesized via simple routes, followed by characterization using various spectroscopic approaches. The THF solvent molecule was incorporated into compounds 2 and 3 through its oxygen atom based on its nucleophilicity. Facile displacement of the chloride ion in 4-oxoquinoline-3-carbonyl chloride by the nucleophilic methylene carbon of 1,3-dialkylbarbiturate/thiobarbiturate afforded the respective hybrids 5 and 6.

scholarly journals Dynamic Programming and Heuristic for Stochastic Uncapacitated Lot-Sizing Problems with Incremental Quantity Discount

2012 ◽  
Vol 2012 ◽  
pp. 1-21 ◽  
Author(s):  
Yuli Zhang ◽  
Shiji Song ◽  
Cheng Wu ◽  
Wenjun Yin
Keyword(s):  
Dynamic Programming ◽  
Lot Sizing ◽  
Dynamic Programming Algorithm ◽  
Optimal Solution ◽  
Mixed Integer ◽  
Programming Algorithm ◽  
Quantity Discount ◽  
Path Property ◽  
Commercial Solver

The stochastic uncapacitated lot-sizing problems with incremental quantity discount have been studied in this paper. First, a multistage stochastic mixed integer model is established by the scenario analysis approach and an equivalent reformulation is obtained through proper relaxation under the decreasing unit order price assumption. The proposed reformulation allows us to extend the production-path property to this framework, and furthermore we provide a more accurate characterization of the optimal solution. Then, a backward dynamic programming algorithm is developed to obtain the optimal solution and considering its exponential computation complexity in term of time stages, we design a new rolling horizon heuristic based on the proposed property. Comparisons with the commercial solver CPLEX and other heuristics indicate better performance of our proposed algorithms in both quality of solution and run time.

Sign in / Sign up

Export Citation Format

Share Document