This work proposes the use of 2D Lattice Flower Constellations (2D-LFCs) to facilitate design a Low Earth Orbit (LEO) slotting system avoid collisions between compliant satellites and optimize available orbital volume. Specifically, this manuscript concentric shells admissible “slots” with stacked intersecting orbits that preserve minimum separation distance at all times. The problem is formula...

The trial production of natural gas hydrate reservoirs remains poor. Reasonable reservoir reconstruction, which can improve formation permeability, is an important approach to increasing the efficiency and enhancing production. In this work, water jet slotting proposed reconstruct near a wellbore. spatial slots formed by not only directly constitute high-permeability channels, but also generate...

Abstract We present a novel rationale for bundling in vertical relations. In many markets, upstream firms compete to be the best downstream slots (e.g., shelf retail store or default application on platform). If multi-product firm faces competition subset of its products, we show that tying monopolised product with competitive ones can reduce rivals’ willingness offer slotting fees retailers. T...

This work focuses on the study of reconfiguration strategies available for uniformly distributed satellite constellations and slotting architectures. Particularly, this paper deals with cases reducing, maintaining, also increasing number positions satellites in a space structure, takes into account potential minimum distances between spacecraft configuration to assure safety system. To that end...

Purpose – The purpose of this paper is to describe an effective method to eliminate or substantially reduce the modulation harmonics due to saturation and inter-modulation for sensorless speed control induction motor drives at low and zero speed with high loads using artificial neural networks (ANN). Design/methodology/approach – In this paper, the separation of the saturation signal, the slott...

Antigenic variation in Trypanosoma brucei is a highly sophisticated survival strategy involving switching between the transcription of one of an estimated thousand variant surface glycoprotein (VSG) genes. Switching involves either transcriptional control, resulting in switching between different VSG expression sites; or DNA rearrangement events slotting previously inactive VSG genes into an ac...

2 Technique Determining a velocity ACF from experimental data is not a straightforward task, especially for laser Doppler velocimetry (LDV) data. Unlike measurements obtained from a hot-wire probe, the LDV signal is inherently intermittent by nature due to the random arrival of particles at the measurement volume. An advantage of the Poisson distributed arrival times is that the Nyquist criteri...