A disjunctive programming problem corresponds to the minimization of an objective function on a constraint set which is a union of sets, for example, min f (x) s.t. min j∈ J g j (x) ≤ 0 where the functions f and g j are real valued defined on a Banach space X and J is a (possibly infinite) index set. This class of problems has been introduced by Balas [4] in 1974 and then studied by many author...

The F/A-18 Hornet aircraft with the original flight control law exhibited an out-ofcontrol phenomenon known as the falling leaf mode. Several F/A-18 Hornet aircraft were lost due to the falling leaf mode and this led NAVAIR and Boeing to redesign the flight control law. The revised flight control law exhibited successful suppression of the falling leaf mode during flight tests with aggressive m...

Objects in clutter are difficult to recognize, a phenomenon known as crowding. There is little consensus on the underlying mechanisms of crowding, and a large number of models have been proposed. There have also been attempts at unifying the explanations of crowding under a single model, such as the weighted feature model of Harrison and Bex (2015) and the texture synthesis model of Rosenholtz ...

The behavior of the disjunctive operator, defined by Balas, Ceria and Cornuéjols, in the context of the “antiblocker duality diagram” associated with the stable set polytope,QSTAB(G), of a graph and its complement, was first studied byAguilera, Escalante and Nasini. The authors prove the commutativity of this diagram in any number of iterations of the disjunctive operator. One of the main conse...

We survey recent research on mixed-integer rounding (MIR) inequalities and a generalization, namely the two-step MIR inequalities defined by Dash and Günlük (2006). We discuss the master cyclic group polyhedron of Gomory (1969) and discuss how other subadditive inequalities, similar to MIR inequalities, can be derived from this polyhedron. Recent numerical experiments have shed much light on th...

cardiovascular diseases are one of the most common diseases that cause a large number of deaths each year. coronary artery disease (cad) is the most common type of these diseases worldwide and is the main reason of heart attacks. thus early diagnosis of cad is very essential and is an important field of medical studies. many methods are used to diagnose cad so far. these methods reduce cost and...

In view of providing an explicit representation of the convex hull by listing all the facets, it is interesting to describe the integral feasible region in terms of interior points, i.e. hypercube vertices which are feasible in (1) and such that all their adjacent hypercube vertices are also feasible in (1) and exterior points, for which there is at least one infeasible adjacent hypercube verte...

The objectives of this paper are to give a brief overview of the code LogMIP and to report numerical experience on a set of test problems. LOGMIP is currently the only code for disjunctive programming, which has implemented the research work done on this area on the last decade. Major motivations in the development of LogMIP have been to facilitate problem formulation of discrete/continuous opt...

Superkonduktor fasa (Tl0.5Pb0.5)Sr2Ca(Cu2-xCrx)O7-δ (Tl-1212) bagi x = 0 hingga 0.100 telah disediakan menggunakan kaedah tindak balas keadaan pepejal. Tujuan kajian ini ialah menentukan suhu optimum untuk pembentukan Tl-1212 dengan komposisi ini. Sampel dalam aliran gas oksigen tiga berlainan iaitu 850 °C kerajang perak selama 5 jam, dan 950 1000 4 min. Bahan diciri pembelauan sinar-X mengenal...

Penelitian dilakukan di Desa Klumpang Kebun dan bertujuan untuk menjelaskan bagaimana kondisi ekonomi masyarakat sekitar aktivitas dengan adanya perbaikan jalan terhadap sosial desa kecamatan hamparan perak, Kabupaten Deli Serdang. Jenis penelitian ini adalah deskriptif pendekatan kualitatif. Pengumpulan data berupa observasi wawancara. Metode keabsahan menggunakan validasi diskusi dari kepala ...