This work introduces an extension to Genetic Programming (GP), known as “GP-UDF” which uses multiple User-Defined Functions (UDFs) to solve surface mapping problems. UDFs are high level primitives, such as polynomials and Gaussian hills, which simplify mapping and aid human interpretation of GP results. Preliminary results show that although UDFs do not improve GP accuracy, they may aid in “lan...

An interesting feature of current Prolog systems is the ability to define external Prolog predicates that can be written in other languages. However, an important drawback of these interfaces is the fact that they lack some important features necessary to improve both the efficiency and the transparent integration of the Prolog system and the external predicates. Such an example is the cut oper...

A wave glider can convert vertical motion into its forward propulsion. There are many factors affecting the propulsion performance of a glider. The swing amplitude hydrofoil affect efficiency to capture energy, and pull direction an umbilical cable transmission energy. In this paper, optimized mechanism with self-adjusting lower limit (SALL) was proposed by analyzing un- synchronized movement b...

The distribution of velocity, sludge, and dissolved oxygen in a full-scale anaerobic-anoxic-oxic (A2/O) oxidation ditch was numerically simulated under three rotation speed scenarios. viscosity settling rate activated sludge were defined through user-defined function (UDF), the phase calculated using mixture multiphase flow model. Dissolved (DO) set as source (UDS) its generation consumption ra...

Based on the biaxial experiment data of membrane material under hot and cold conditions, mechanical properties calculation model envelope was established with consideration effects varying stress ratios, magnitudes temperatures near-space airship material. Using heat source model, Computational Fluid Dynamics (CFD) simulation, User-Defined Function (UDF), structural finite element analysis soft...

Recent years have seen an increased interest in large-scale analytical dataflows on non-relational data. These dataflows are compiled into execution graphs scheduled on large compute clusters. In many novel application areas the predominant building blocks of such dataflows are user-defined predicates or functions (Udfs). However, the heavy use of Udfs is not well taken into account for dataflo...

BACKGROUND Pregnant women with congenital heart disease (CHD) are susceptible to cardiovascular, obstetric, and offspring complications. In women with CHD, cardiac dysfunction may compromise uteroplacental flow and contribute to the increased incidence of obstetric and offspring events. METHODS AND RESULTS We performed a prospective multicenter cohort study of pregnant women with CHD and heal...

Cloud computing has demonstrated that processing very large datasets over commodity clusters can be done simply, given the right programming model and infrastructure. In this paper, we describe the design and implementation of the Sector storage cloud and the Sphere compute cloud. By contrast with the existing storage and compute clouds, Sector can manage data not only within a data centre, but...

OBJECTIVE Pregnancy in women with surgically corrected tetralogy of Fallot (ToF) is associated with cardiac, obstetric and neonatal complications. We compared uteroplacental Doppler flow (UDF) measurements and pregnancy outcome in women with ToF and in healthy women and aimed to assess whether a relationship exists between cardiac function and UDF in women with ToF. METHODS We evaluated prosp...

Abstract To study the distribution characteristics of muzzle flow field underwater sealed launch in different environments, a two-dimensional axisymmetric multiphase numerical model was established. The VOF model, Standard k-ε turbulence user-defined function (UDF), and dynamic mesh technology are used to simulate evolution process air launch. calculation results show that is significantly from...