For a finite-dimensional algebra A over field K with n simple modules, the real Grothendieck group 0 ( proj ) R : = ? Z ? gives stability conditions of King. We study associated wall-chamber structure by using Koenig–Yang correspondences in silting theory. First, we introduce an equivalence relation on called TF numerical torsion pairs Baumann–Kamnitzer–Tingley. Second, show that open cone span...

The article deals with one of the most important problems mechanization rural and economic work on state irrigation canals ensuring their high-quality functioning. Irrigation canals, water intakes hydraulic structures are destructed deformed from natural climate artificial factors. A large capacity bucket shovel form equipped roller designed for cleaning lined silting sediment was considered. l...

To study the set of torsion classes a finite dimensional basic algebra over field, we use decomposition, called sign-decomposition, parameterized by elements {±1}n where n is number simple modules. If A an with radical square zero, then for each ϵ∈{±1}n there hereditary Aϵ! zero and bijection between associated to ϵ faithful Aϵ!. Furthermore, this preserves property being functorially finite. F...

The operating quality of reclamation drainage and irrigation systems depends on the condition their main elements. elements are canals with various profiles, ranging from rectangular to parabolic. most widespread in land a trapezoidal profile. At same time, it is possible note that natural production characteristics quite diverse, this issue especially relevant for geometric parameters canals. ...

With the development of society and economy, land subsidence in soft soil areas has become a prominent geological disaster our country’s coastal area. Land characteristics irreversibility, wide influence range, long aging, etc., these are closely related to soil, such as physical mechanical parameters, microstructure characteristics, etc. The Nansha District Guangzhou was taken study area this ...

The large capacity transmission of power over long distance and the rapid development of renewable energy increase the probability of unexpected emergencies such as overload and under-voltage. To tackle these emergencies and defend future disturbances, the corrective switching is implemented as an online control and a multi-objective scheme-making approach is proposed. A multi-objective 0-1 int...

Chaparral lands of central Arizona are important for water production. They are also used as grazing lands for livestock and as habitat for wildlife. An understanding of the relation of grazing to runoff and erosion is thus essential to the development of management systems for sustained high yields. This paper reports the effects of grazing on runoff and erosion as determined on four experimen...

This study aims to analyze changes in the morphometry of lake bottom a period ten years, namely from 2006 2016. The analysis morphometric is carried out by comparing two bathymetric maps mapping and aspects studied include water surface area stated km 2 , volume (in m 3 ) depth m). results showed that within 10 years has decreased 1.03 while total increased 10.41 . average barely changed signif...

Abstract The Ningxia reach of the Yellow River (NRYR) is wide and shallow, instability damages are likely to occur at its vulnerable zone. In this study, based on one‐dimensional hydro‐sediment dynamics, two‐dimensional dynamics zone stability analysis model, a coupled model was established analyze scouring risk zones in NRYR during flood season. Considering morphological change bank slope caus...