Estimating the cutting force when skiving with a radius cutter

The paper considers the method of determining the components of the cutting force under cutting completed with a radius cutter. The authors provide the design of the experimental study. The authors provide the data on the cutting force change in the process of turning with a radius cutter according to the cutting edge inclination, cutting depth and supply obtained experimentally and calculated analytically. The paper also provides the results of experimental work approximation and theoretical error checking related to experimental data

Experimental estimation of chip shrinkage under cup-tip cutting with straight and radius cutters

In the given work we present the results of experimental estimation of chip shrinkage under turning with straight and radius cutters for two schemes of cutting: "direct" and "reverse". Ratios of thickening, broadening and longitudinal shrinkage of the chip were established as shrinkage parameters. The given paper presents the graphic charts showing dependences of shrinkage upon cutting depth, supply and cutting edge inclination which indicate the deformations taking place in the cutting area when cutting with cup-tip cutters. The authors show the significant difference in the character and degree of chip shrinkage when working according to various schemes of cutting

Влияние стерилизации на свойства трековых мембран из полиэтилентерефталата

В работе представлены результаты исследований трековых мембран из полиэтилентерефталата после паровой стерилизации и стерилизации ионизирующим облучением.Исходя из полученных данных, можно считать, что стерилизация ионизирующим излучениемрадионуклидов Co60 является более предпочтительной, чем паровая стерилизация

The influence of the concentration of montmorillonite containing sorbent and pH of the culture medium on the antibiotic sensitivity of Escherichia coli, as well as the effect of ground on growth of Escherichia

The aim of this work was the comparative sensitivity test of E. coli to enrofloxacin and doxycycline and bactericidal action of montmorillonite containing sorbent and its combination with enrofloxacin, as well as the influence of the concentration of the enriched montmorillonite containing sorbent and pH of the culture medium on the antibiotic sensitivity of Escherichia coli. The sensitivity test of Escherichia coli to enrofloxacin, and the combination of enrofloxacin with sorbent was performd by the method of double serial dilutions of drugs in a liquid culture mediu

Educational potential specialists of customs authorities

The article analyzes the current state of the educational potential of the officials of the Tver customs. Prospective possibilities of development in the vocational education system of customs

RESEARCH OF POLITICAL COMMUNICATIONS: THE STATE AND SOCIAL MEDIA

Social media are widely used by politicized audience and politicians. The article examines the problems of interaction between the state and society on social media. The paper highlights the policy of the Russian state aimed at both stimulating the use of new communication tools and controlling them. It is demonstrated that social media are neutral and the way they display depends on their acquired qualities in the certain political system

Pancreatogenic infections: importance of microbiological monitoring and penetration of antimicrobial chemotherapeutic agents into the pancreas when defining therapeutic approach

The review provides the information on the spectrum of microorganisms initiating the development of clinical and morphological forms of pancreatogenic infections. It is shown that when analyzing pathological conditions, no features in the microbiological landscape of the secondary infection in the pancreas and the surrounding extraperitoneal cellular tissue are registere

Результаты лечения вич-инфицированных пациентов с туберкулезом центральной нервной системы при применении различных режимов химиотерапии

Результаты лечения вич-инфицированных пациентов с туберкулезом центральной нервной системы при применении различных режимов химиотерапи

Estimates of Reachable Sets of Control Systems with Bilinear–Quadratic Nonlinearities

The problem of estimating reachable sets of nonlinear impulsive control systems with quadratic nonlinearity and with uncertainty in initial states and in the matrix of system is studied. The problem is studied under uncertainty conditions with set – membership description of uncertain variables, which are taken to be unknown but bounded with given bounds. We study the case when the system nonlinearity is generated by the combination of two types of functions in related differential equations, one of which is bilinear and the other one is quadratic. The problem may be reformulated as the problem of describing the motion of set-valued states in the state space under nonlinear dynamics with state velocities having bilinear-quadratic kind. Basing on the techniques of approximation of the generalized trajectory tubes by the solutions of control systems without measure terms and using the techniques of ellipsoidal calculus we present here a state estimation algorithms for the studied nonlinear impulsive control problem bilinear-quadratic type.The research was supported by the Russian Foundation for Basic Researches (RFBR) under Project 15-01-02368a, by the Project "Positional Differential Games, Hamilton-Jacobi Equationsand Applications" in the framework of the Research Program "Mathematical Problems of Modern Control Theory" of the Presidium of Russian Academy of Sciences and by the Program "StateSupport of the Leading Scientific School" (NS-2692.2014.1)