Chinese Science Bulletin

Studies in 2021-2023 under conditions of unstable moisture in the Central Forest-Steppe of Ukraine revealed a positive effect of urea-ammonia mixture (UAN) on the yield and sowing properties of seeds of maternal lines of maize hybrids of different maturity groups (P6/240, P5/320, P4/440). Based on the research results, it was found that the application of 80 l/ha of UAN in the V10 phase increased seed yield by 10.6-11.9% compared to the control. The highest level of seed yield of the maternal line of the early-ripening hybrid P6/240 (6.16 t/ha) by 22.5%, the mid-ripening hybrid P5/320 (6.20 t/

Patch antennas are the most vital component of the various automotive applications due to its small size and conformal features and can offer both ground and space-based communications. This article presents 1×2 element S-shaped slotted microstrip patch antenna array operating at a center frequency of 8.2 GHz in X-band suitable for terrestrial communications. The fabricated prototype of the proposed design offers a compact size of 36mm × 50mm and measured -10 dB impedance bandwidth of 700 MHz in band of interest. Moreover, the simulated effect of plastic and glass part of the car body has al

The sharp and terrific increment in pollution and waste, economic growth, industrialization, and urbanization have become major issues that must be addressed by nationally and internationally governments in order to maintain balance in the environment and life. The greatest economic value is defined when waste is detached at the primary level. Waste segregation at dump yards takes time, providing recycling ineffective. Waste must be separated, handled, transported, and disposed of properly in order to reduce the risk to public health and the environment. The goal of this article is to create a

Frequent traffic jams cause an accumulation of vehicles at intersections adjacent to railroad crossing gate, which results in reduced road service functions, loss of vehicle function as a means of transportation, waste of fuel energy, and increased CO and CO2 levels in the intersection area these four. The absence of integrated control between traffic lights and the opening and closing of railroad crossing gate causes traffic jams. Therefore, integrated control must be carried out, especially during and after a while when trains cross the highway. One of the cases raised in this research was a

Developing low-dielectric materials has opened new paths toward developing highly efficient microstrip Patch antennas for wireless applications. This paper presents the performance of various dielectric materials, having dielectric constants ranging from 2 to 5. The rectangular microstrip patch antennas for WiMAX, WLAN applications have been designed and fabricated. Substrates used to design the antennas are FR4 glass epoxy, RT Duroid, and Rogers with dielectric constants of 4.4, 2.2, and 3 respectively. The thickness of the substrates is fixed at 1.52 mm. A comparative analysis based on retu