When describing many real physical processes, nonlinear differential equations with partial derivatives are formed. The study of the general properties of nonlinear equations and methods for their solution is an important direction in the field of computing technologies. Although there are interesting studies and many effective methods for solving and investigating such equations, this area of applied mathematics does not have a sufficient theoretical basis, as in the theory of linear equations.
28.11.2022 Volume 1 Issue 8 View more Download
This article talks about digital economy and digitalization of economic security and improvement of its management system. In addition, we will consider the state of the digital economy in the countries of the world, together with the reforms being carried out in this regard, and the views of our country in this regard.
28.11.2022 Volume 1 Issue 8 View more Download
In this article, it is considered that the hotel staff should have professional qualifications and excellent performance of the specified services in order to provide hotel services at a high level and efficiency and to fully satisfy the guests' requirements.
28.11.2022 Volume 1 Issue 8 View more Download
The article considers the verification and calibration system of measuring instruments used in the Republic of Uzbekistan. Measuring instruments used in the field of distribution of state metrological control and supervision are subject to mandatory verification. Measuring instruments used outside the scope of state metrological control and supervision, and not subject to mandatory verification, may be calibrated during their production, sale, operation, rental, repair and import into the territory of the Republic of Uzbekistan.
28.11.2022 Volume 1 Issue 8 View more Download
Consulting services, modern business system, in the places of sale of productsprofessional assistance to consultants and service personnel indicating that consultants are primarily engaged in consulting and are held accountable for completion.
28.11.2022 Volume 1 Issue 8 View more Download
This article discusses the use of effective methods of trade services, the development of a strategy for its new forms and methods of production. Practical application of various self-service technologies to optimize the trade and technological process abroad. The effectiveness of commercial reconciliation is associated with the development of information technologies designed to simplify the elimination of the consequences of the purchase.
28.11.2022 Volume 1 Issue 8 View more Download
The article considers the principle of constructing optoelectronic elements divided into two large groups of converters, which are based on the property of transparent liquids, gases and solids that absorb the light flux passing through them, depending on the wavelength of the radiation flux, the thickness of the layer and the composition of the controlled substance.
28.11.2022 Volume 1 Issue 8 View more Download
In Uzbekistan, only in recent years has irrigation with highly alkaline water been introduced, but this has led to a decrease in the productivity of thousands of hectares of agricultural land. Thus, this study was designed to evaluate the effectiveness of different rates and sizes of gypsum as an amendment that improves soil physicochemical properties and crop yield. The treatments consisted of two gypsum granule sizes (1-10 mm and β1 mm) and two application methods (adding gypsum to irrigation water and mixing it with the soil) at three levels of gypsum applied to the soil, either 50%, 75% and 100% of the need for gypsum (GR). The results of the study showed that gypsum application increased soil salinity and hydraulic conductivity, but decreased sodium adsorption ratio (SAR) and pH. Growth of wheat yield was greater in coarse gypsum than in fine gypsum, but for most soil and plant parameters, the difference between fine and coarse gypsum was generally similar to GR level. was not significant. Drought conditions have been found to reduce the impact of gypsum on soil and plants, as wheat yield decreased by 10% in a drought year compared to a normal year. showed. Finally, farmers were advised to remediate sodic soil by applying coarse gypsum at 100% GR as it is a cost-effective method of reclamation of sodic soil.
28.11.2022 Volume 1 Issue 8 View more Download
SCIENCE & INNOVATION