Analysis of the base of a reclamation dam when operating in a pressure variable mode

A calculation was carried out and a numerical modeling of the foundation of an hydromeliorative dam was carried out during its operation in a pressure-variable mode, using the MIDAS GTX NX software package, by building a computational model based on the real engineering-geological state of the object, when horizontal stresses (kN/m2) depending on the variable water level in the upstream and downstream, a mathematical model of the process is obtained from the named factors and the degree of influence of each of them is revealed.

Primary Signal Phase Suppression Technique Based On Mutual Information Improved Variational Mode Decomposition

Specific emitter identification (SEI) identifies targets mainly by unintentional modulation of the signal. However, due to the high energy of the primary signal, once the primary signal changes, the recognition becomes less effective or even impossible using a feature database that is not updated. In this paper, we propose to use a mutual information improved variable mode decomposition (VMD) algorithm to suppress the primary signal phase of the transmitter. Furthermore, we simulate the feature extraction of the unintentional phase modulation of the transmitter signal and use support vector machine (SVM) for individual identification. The simulation results show that the algorithm improves the recognition rate by about 6% (0 dB) compared to the retained primary signal. The results demonstrate that our proposed phase suppression technique improves the adaptability and accuracy of individual identification of transmitters.

Performance Analysis of Variable Mode Adsorption Chiller at Different Recooling Water Temperatures

Adsorption cooling can recover waste heat at low temperature levels, thereby saving energy and reducing greenhouse gas emissions. An air-cooled adsorption cooling system reduces water consumption and the technical problems associated with wet-cooling systems; however, it is difficult to maintain a constant recooling water temperature using such a system. To overcome this limitation, a variable mode adsorption chiller concept was introduced and investigated in this study. A prototype adsorption chiller was designed and tested experimentally and numerically using the lumped model. Experimental and numerical results showed good agreement and a similar trend. The adsorbent pairs investigated in this chiller consisted of silicoaluminophosphate (SAPO-34)/water. The experimental isotherm data were fitted to the Dubinin–Astakhov (D–A), Freundlich, Hill, and Sun and Chakraborty (S–C) models. The fitted data exhibited satisfactory agreement with the experimental data except with the Freundlich model. In addition, the adsorption kinetics parameters were calculated using a linear driving force model that was fitted to the experimental data with high correlation coefficients. The results show that the kinetics of the adsorption parameters were dependent on the partial pressure ratio. Four cooling cycle modes were investigated: single stage mode and mass recovery modes with duration times of 25%, 50%, and 75% of the cooling cycle time (denoted as short, medium, and long mass recovery, respectively). The cycle time was optimized based on the maximum cooling capacity. The single stage, short mass recovery, and medium mass recovery modes were found to be the optimum modes at lower (<35 °C), medium (35–44 °C), and high (>44 °C) recooling temperatures. Notably, the recooling water temperature profile is very important for assessing and optimizing the suitable working mode.

Possible Functions of P21 CDKN1A within the Germ Cells of the Mouse Sseminiferous Epithelium

The cyclin dependent kinase inhibitor P21 CDKN1A has been shown to be upregulated during differentiation and after DNA damage in somatic cells. We examined the expression of P21 CDKN1A and of &gamma;-H2AX during the differentiation of germ cells in normal mouse testis. P21 CDKN1A was normally expressed in in a variable mode in different cell types (spermatogonia, spermatocytes, spermatids, Sertoli cell) located since the basal till the lumen of the seminiferous tubules. Moreover, in agreement with &gamma;-H2AX expression, P21 maybe involved in different cell cycle checkpoints in spermatocytes such as a pre-replication, XY body inactivation, a mid-pachytene and a metaphase I checkpoints. Finally, in comparison to control, the p21 deficient mouse testis show elevated numbers of apoptosis of elongated spermatids within stages VIII-IX but any difference in the number of spermatogonia mitosis.These results suggest that P21 also may take part in the regulation of the differentiation of the male germ cells and may have a role in spermatogonia not related with a mitotic checkpoint.

THE INFLUENCE OF THE AGENDA ON THE PRODUCTIVITY OF COWS OF DIFFERENT LACTATIONS UNDER DIFFERENT KEEPING REGIMES

It was found that during lactation the milking of cows in the experimental groups at the constant regime were at the level of 4639 kg of milk, which is more than at the variable regime by 159.8 kg or 3.57%. As a result, the cost of feed in the variable mode of the day per 1 kg of milk was 1.38 feed units, and at constant - 1.10 feed units, which is less than 0.28 feed units or 20.3%. The constant daily routine reduced labor costs in milk production by 9.7%, and by 1 quintal of milk - 34.2%. It is presented that it is inexpedient to violate the daily routine, which leads to the loss of marketable milk by more than 3.6%.

Comparative Analysis of the Effectivenessof the Using of Direct and Generalized Conditional Reinforcement in the Development of a Skill of Solving of Simple Arithmetic Problems in a Child with ASD

Within the framework of the applied behavior analysis, a comparison of the effectiveness of the direct and the generalized reinforcement was made during the teaching the skill of distinguishing arithmetic operations in mathematical problems. The study was conducted in two phases over two weeks with a 9-year-old girl with autism spectrum disorder (ASD). The first phase included training of multiplication and addition tasks, using tangible reinforcement, compared to the training of the arithmetic performance in division and subtraction tasks, using generalized reinforcement. The second phase included the training of discrimination between different arithmetic operations, but tangible and generalized reinforcements were used in variable mode. The results showed no differences in the effectiveness of both generalized and tangible reinforcements in the teaching process. The participant successfully learned to discriminate between different arithmetic operations as addition, multiplication, subtraction and division in single-component tasks.

Energy and exergy analysis of combined cooling and power system using variable mode adsorption chiller

Adsorption cooling is a promising technology to recover low-temperature waste heat from a diesel genset. In this paper, an advanced adsorption chiller working in variable mode is proposed for the combined cooling and power cycle (CCP) to recover waste heat from the water jacket in the diesel genset. The chiller works on three modes based on the ambient temperature for better heat utilization. In this study, three modes were investigated: single-stage cycle mode, short-duration, and medium-duration mass recovery modes. The results show that the energy and exergy efficiency for a single-stage cycle mode is higher at an ambient temperature lower than 35 °C . In comparison, the mass recovery mode has a higher energy and exergy efficiency at an ambient temperature higher than 35 °C. The annual energy and exergy efficiency for the CCP was investigated when the chiller works with variable modes based on the ambient temperature under DUBAI weather conditions as a case study. The results show an improvement of 14.7% and 14% of the energy and exergy efficiency, respectively, for CCP with a variable mode adsorption chiller compared to diesel genset alone. The results also show the CCP with variable mode adsorption chiller has a slight improvement on both energy and exergy efficiency compared to CCP with a single-stage adsorption chiller at the same ambient conditions.