Parameter Analysis Method Research Articles

Variety of effects of silicon dioxide colloid in the treatment of antibiotic-associated diarrhea in children

Antibiotic-associated diarrhea (AAD) is a key aspect of pediatrics concerning antibiotic therapy Purpose. The article aims at investigating the effects of colloidal silicon dioxide in the treatment of antibiotic-associated diarrhea in children. Materials and methods. Using parametric and nonparametric methods of analysis, 83 patients were examined (treatment group — 41 children who used colloidal silicon dioxide and the control group — 42 children) of both sexes (mean age (13.7 ± 2.6) years) with pathology of the lower respiratory tract (acute bronchitis or community-acquired pneumonia), who developed AAD against the background of ABT. Results. When using colloidal silicon dioxide in 75.6% of children, diarrhea decreased by the 2nd day and stopped by the 4th day (median — 0 points). Against the background of taking the drug throughout the treatment, there was a marked 3-fold decrease in all AAD values. The assessment of the efficacy and safety of the drug according to the data of medical researchers was 3.4 points. Analysis of subjective data on the tolerability of the drug showed «excellent» and «good». Against the background of the full course of treatment with colloidal silicon dioxide, a 2 times more pronounced decrease in the characteristics of AAD was noted. Conclusion. The presented data are intended to focus the attention of pediatricians on the rational use of ABT, timely diagnosis of an unwanted drug reaction in the form of AAD and its correction. The studied drug showed high efficacy and safety, which makes it possible to recommend it as a symptomatic treatment of diarrhea that developed against the background of ABT treatment in the complex therapy of diseases of the lower respiratory tract in children.

Investigation on dynamic characteristics of composite sandwich plates with co-cured damping core

The purpose of this paper is to investigate how to improve the damping performance of carbon laminates when novel viscoelastic layer is inserted into the structure. Viscoelastic layer is a rubber polymer with excellent damping property. In this study, the novel rubber polymer is prepared by orthogonal test method and co-curing theory. A parameter analysis method based on finite element simulation is proposed to explain how to enhance the damping performance of carbon laminates by arranging viscoelastic layers. The dynamic analytical model of the structure is established to determine damping characteristics of the co-curing damping sandwich composite structure according to the structural geometric equation and constitutive relation. Rayleigh-Ritz method is employed to derive the modal natural frequency and modal loss factor of structure. The results of finite element simulation, theoretical derivation and modal test are in good agreement, which verifies the validity of the theoretical model and experimental design. It provides a theoretical basis for the design and application of composite structures with large damping and high stiffness.

The Effect of 5E-Learning Cycle Model Using Animation Media on the Learning Activity and Learning Outcomes of Students in Senior High School Class XI on Salt Hydrolysis Material

The aim of this study is to determine the effect of learning model 5E learning cycle on learning activities and student learning outcomes on salt hydrolysis material. The research was conducted at Senior High School (SMA) Negeri 10 Medan. This research used research design of Pretest-posttest control group design. The sample was taken by purposive sampling technique and the obtained sample consist of 2 class which is: XI IPA 2 as an experimental class and XI IPA I as a control class. In the experimental class was taught used learning model 5E learning cycle using animation media and in control, class was taught using direct instruction model using animation media. The research instrument used the objective test in form of multiple choice questions as many as 25 questions, which previously passed through validation test, difficulty test, the test of different power, and reliability test with reliability value 0,91. Data analysis in this study used parametric inferential statistical analysis method, which the pretest and normalized score data had to pass normality and homogeneity test. X2count the pretest and gain score in the two study classes is greater than X2table and F-count the pretest and gain score in both the research class is greater than F-table. The research hypothesis was tested using statistical right-tailed t-test. Based on the calculation of t-statistical using right-tailed t-test obtained t-count results 4.29 and t-table at the 0.05 significance level 1.99. Furthermore, by t-count> t-table implied that the results of this study indicate there is influence of learning model of learning cycle 5E using animation media to the student learning outcomes in SMA of class XI on salt hydrolysis and student learning activity taught by learning model 5E learning cycle using animation media equal to 64,88%, higher than the student learning activity taught by direct instruction model using animation media that is equal to 55,72%.

Bifurcations of Periodic Orbits in the Gravitational Field of Irregular Bodies: Applications to Bennu and Steins

We investigate the topological types and bifurcations of periodic orbits in the gravitational field of irregular bodies by the well-known two parameter analysis method. Results show that the topological types of periodic orbits are determined by the locations of these two parameters and that the bifurcation types correspond to their variation paths in the plane. Several new paths corresponding to doubling period bifurcations, tangent bifurcations and Neimark–Sacker bifurcations are discovered. Then, applications in detecting bifurcations of periodic orbits near asteroids 101955 Bennu and 2867 Steins are presented. It is found that tangent bifurcations may occur three times when continuing the vertical orbits near the equilibrium points of 101955 Bennu. The continuation stops as the Jacobi energy reaches a local maximum. However, while continuing the vertical orbits near the equilibrium points of 2867 Steins, the tangent bifurcation and pseudo period-doubling bifurcation occur. The continuation can always go on, and the orbit ultimately becomes nearly circular.

Karakteristik Saus Jeroan Cumi-Cumi dengan Penambahan Karagenan Sebagai Stabilizer

Utilization of squid (Loligo sp) viscera waste with high levels of production and consumption of squid in the community. This study aims to determine the characteristics of squid (Loligo sp) viscera sauce with the addition of carrageenan as a stabilizer. This study used a randomized block design for parametric statistical data analysis and Kruskal-wallis method for non-parametric statistical data analysis. In this experiment, there were 4 treatments with 3 replications. The parameters used consisted of chemical parameters (moisture content, ash content, protein content, and carbohydrate content), physical analysis (viscosity and total dissolved solids) and sensory analysis (appearance, aroma, taste and consistency). The results showed that the squid viscera sauce with the addition of carrageenan had a significant effect on moisture content, ash content, protein content, carbohydrate content, viscosity and total dissolved solids. The sensory analysis results showed that the treatment had a significant effect on the appearance and consistency values, but had no significant effect on smell and taste values of the resulting squid viscera sauce.

Effect of heat transfer on Jeffery–Hamel Cu/Ag–water nanofluid flow with uncertain volume fraction using the double parametric fuzzy homotopy analysis method

Effect of heat transfer on Jeffery–Hamel Cu/Ag–water nanofluid flow with uncertain volume fraction using the double parametric fuzzy homotopy analysis method

Research on Block Image Texture Retrieval Method Based on Depth Hash

In order to improve the retrieval ability of super-resolution multi-space block images, a texture retrieval method of block images based on depth hash is proposed. A texture feature analysis model of super-resolution multi-dimensional partitioned images is constructed, which combines texture spatial structure mapping method to realize depth information fusion of partitioned images, adopts edge feature detection and texture sparse feature clustering to realize texture hierarchical structure feature decomposition of super-resolution multi-dimensional partitioned images, and adopts deep image parameter analysis method to construct pixel structure recombination model of multi-dimensional partitioned images. Multi-dimensional texture parameter structure analysis and information clustering are realized for the collected partitioned images in multi-dimensional space. According to the information clustering results, the texture retrieval and extraction of partitioned images are realized by using the deep hash fusion algorithm, and the information detection and feature recognition capabilities of partitioned images in multi-dimensional space are improved. Simulation results show that this method has higher precision and better feature resolution in texture retrieval of partitioned images in multidimensional space, which improves the texture retrieval and recognition ability of partitioned images.

Fatigue life assessment of high-strength steel wires: Beach marks test and numerical investigation

High-strength steel wires are widely used in large-span bridges. Fatigue damage of steel wires is becoming more and more prominent under adverse environment and repeated load. This paper performed the fatigue crack growth rate tests of high strength steel wires under different stress ratios. The striated fracture morphology was obtained by stepwise fatigue loading method. The fatigue crack growth rate of steel wire was determined by measuring fracture stripe width by optical microscope. The experimental curves of fatigue crack growth rate versus stress intensity factor range under various stress ratios were obtained. The fracture morphology of steel wires after fatigue was observed by scanning electron microscopy. The characterization parameters of fatigue crack growth and critical fracture required for numerical simulation were obtained based on experimental results and statistical method. Following that, a numerical fatigue crack propagation model was established combined with ABAQUS and FRANC3D. The numerical model was validated by experimental observations in the present study and open literature. A parametric analysis method considering initial pit depth and stress amplitude was proposed to evaluate the residual life of steel wires. The results showed that the linear elastic fracture mechanics and numerical simulation-based method can be used to assess the fatigue life of virgin and corroded steel wires.

Research on the Approximate Calculation Method of the Fundamental Frequency and Its Characteristics on a Tensioned String Bridge

As a new type of composite bridge, the dynamic structural characteristics of a tensioned string bridge need to be deeply studied. In this paper, based on the structural characteristics of a tensioned string bridge, the Rayleigh method is used to derive formulas for calculating the frequencies of vertical, antisymmetric and lateral bending vibrations. The characteristics of the vertical and lateral bending vibration frequencies are summarized. The fundamental frequencies of the antisymmetric vertical bending and lateral bending of the tensioned string bridge are the same as that of the single-span beam under the corresponding constraint conditions. The shape and physical characteristics of the main cable have no effect on the frequency. The vertical bending symmetrical vibration frequency of the tensioned string bridge is greater than the corresponding symmetrical vibration frequency of the simply supported beam. The shape and physical characteristics of the main cable have a greater impact on the vertical bending symmetrical vibration frequency than the lateral bending frequency, and the vertical bending symmetrical vibration frequency increases with an increasing rise-to-span ratio. The tension force of the main cable has no influence on the frequency of tensioned string bridges. The first-order frequency of the tensioned string bridge is generally the vertical bending symmetrical vibration frequency. By adopting a tensioned string bridge structure, the fundamental frequency of a structure can be greatly increased, thereby increasing the overall rigidity of the structure. Finally, an engineering example is applied with the finite element parameter analysis method to study the vibration frequency characteristics of the tensioned string bridge, which verifies the correctness of the formula derived in this paper. The finite element analysis results show that the errors between the derived formula in this paper and the finite element calculation results are less than 2%, indicating that the formula derived in this paper has high calculation accuracy and can meet the calculation accuracy requirements of engineering applications.

Evaluation Algorithm of Ideological and Political Assistant Teaching Effect in Colleges and Universities under Network Information Dissemination

Ideological and political course is a key course to implement the fundamental task of building morality and cultivating people. Teaching evaluation is an important part of the construction of ideological and political courses. Constructing a perfect teaching evaluation index system is an urgent need to further deepen the teaching reform of ideological and political courses and improve the teaching quality of ideological and political courses. In order to improve the practical application effect of mixed teaching mode, an online and offline mixed teaching effect evaluation method based on big data analysis is proposed. Firstly, the big data in the process of mixed teaching are collected by using big data technology, and the evaluation index system is constructed from three dimensions. The required data are extracted according to the index, and then the association rules between the relevant data of the evaluation index are established, the phase space distribution of the data is obtained. Finally, the constraint parameter analysis method is used to fuse the control variables and explanatory variables of the index-related data to realize the online and offline mixed teaching effect evaluation. The application analysis results show that the method in this paper obtains ideal evaluation results of online and offline mixed teaching effects, which is conducive to improving teaching quality.

Numerical Analysis of Horizontal Impact Resistance of Rock Socketed Pile with Steel Casing

Based on a Wharf project in Chongqing, this paper carries out experimental research and nonlinear finite element analysis on the impact resistance of steel casing rock socketed pile of inland river frame Wharf under horizontal impact load. The results show that the impact force and its growth rate, the bending moment of concrete pile core, and the maximum lateral displacement of pile top increase significantly with the increase of impact energy, and the linear increase of the maximum displacement of pile top is better. Under the same impact energy, with the increase of impact mass, the maximum impact force decreases, the maximum bending moment of concrete pile core and its vibration center value (platform value) increase, and the maximum displacement of pile top and its vibration center value (platform value) increase. Based on the impact mass m threshold, the criterion of different dynamic response forms of pile body is proposed. The impact mass threshold corresponds to the development of plastic hinge at the root of pile body. Through the parametric analysis method, it is obtained that the impact mass, impact velocity, and the maximum displacement of pile top meet the parabolic spherical relationship.

Determination of The Effect of Zeolite and Organic Acid Mixture Supplementation on Performance and Egg Quality in the Layer Diet Using Grey Relational Analysis Method

Grey system theory is a method used when the assumptions of homogeneity of variances in the application of parametric statistical methods of analysis, the assumption that the distribution of data to be applied is appropriate to the normal distribution and that it is, for example, of sufficient size. Grey relational analysis is one of the subtitles of the grey system theory and it is a method of grading, classification and decision making in the data set using the Grey Relation Coefficient (GIA). In this study, the effects of addition of zeolite, organic acid and zeolite-organic acid added to the rations of twenty-four Lohmann LSL type white-laying hens at 28 weeks of age on the quality and performance of eggs were examined. Grey relational analysis was applied to egg quality and performance criteria. It was found that the highest quality eggs were added with organic acid (P) additions to the chicken rations (P6, P3, P1), and the K1 in the control group and the (Z + P) 1 sample in which the zeolite and organic acid additives were applied together were also found in the quality egg group. In terms of quality, middle class egg samples were determined to be zeolite additive group and low quality egg group was found to be control and zeolite + organic acid added group.

Alternative Ways to Improve Asthma Control in Obese Patients

Diseases of the respiratory tract occupy one of the leading places among pathologies in people of working age in the world. According to the data of world studies, it can be considered that these two comorbidities are mutually aggravating, but scientists do not have a unanimous opinion about whether this is a simple coincidence or whether these pathologies are pathogenetically related. There is considerable evidence that asthma patients do not achieve adequate asthma control worldwide. Yes, according to Maria Sandra Magnoni et al. 77.8% of patients with asthma have an uncontrolled course of asthma, although 68.4% of them believe that they have sufficient asthma control, and their treatment does not require correction. Therefore, taking into account all of the above and taking into account the low level of asthma control in patients with comorbid pathology who often suffer from bacterial and viral diseases, we believe that a more detailed study of the immunological status of these individuals is necessary in order to optimize treatment and prevention measures. Aim: to investigate the effectiveness of alternative ways of asthma control in patients with bronchial asthma against the background of overweight or obesity. Materials and methods. At the I stage, 255 patients with BA were examined. According to the study design, patients were selected according to the "inclusion/exclusion" criteria at this stage. The study was randomized. Allocation of patients into groups was carried out by the method of simple randomization with elements of stratification. Groups are statistically significant. Statistical processing of the results was carried out using parametric and non-parametric analysis methods. Resalts. Overweight or obese patients had a more severe course of bronchial asthma than patients with a normal body mass index. Overweight or obese patients were found to have higher levels of systemic inflammation, namely eosinophilic cationic protein levels and erythrocyte sedimentation rate, than patients with a normal body mass index. In addition, a close direct correlation was established between the severity of the course of bronchial asthma and indicators of eosinophil cationic protein (r=0.97; p˂0.001). After pharmacological correction, there was an increase in asthma control in patients with different severity of the course (р˂0.001; p˂0.001; p˂0.001, respectively), a decrease in the frequency of exacerbations (p˂0.05), a reduction in the number of hospitalizations (p˂0, 05) and the number of acute respiratory diseases (p˂0.05) in patients with bronchial asthma against the background of excess body weight or obesity. The use of the developed treatment-prophylactic complex using the drug bacterial lysate and inosine pranobex together with training in the Asthma School and standard treatment contributes to increasing asthma control and compliance with the doctor, reducing the number of exacerbations and hospitalizations per year in patients with bronchial asthma against the background overweight or obesity.

Characterization of grain boundary character distribution in cemented carbides via a stereological method

This paper reports the interdisciplinary approach of simultaneous use of a stereological method, namely the five parameter analysis (FPA) method and the grain boundary character distribution (GBCD) in cemented carbides. There are six major aspects: i) the background and motivations of the interdisciplinary approach, ii) the principle of the FPA method, iii) orientation texture of boundary planes with specific misorientations via ?(?g, n) mode in cemented carbide, iv) orientation texture of habit planes regardless of misorientations via ?(n) mode in cemented carbide, v) application of the FPA method to serial cemented carbide samples and vi) boundary sort methods before using the FPA method. The work aims at presenting beneficial reference for studying structural and distribution features of special coincidence site lattice (CSL) boundaries in a statistical manner, and in turn increasing the knowledge about the structure-property relationship in cemented carbides.

Construction of Multiobjective Planning Decision-Making Model of Ecological Building Spatial Layout under the Background of Rural Revitalization.

In order to improve the spatial layout ability of ecological buildings under the background of rural revitalization, a multiobjective planning and decision-making model for the spatial layout of ecological buildings is constructed. Based on the visual impact detection of ecological building space, a three-dimensional rendering model is established. The block matrix matching and boundary contour parameter analysis methods are used to plan and design the layout boundary feature points, and the wavelet scale decomposition method is used to analyze the mixed tone of the layout image. Based on this, a multiobjective planning decision-making model for the spatial layout of ecological buildings is established, based on which the spatial layout design scheme of ecological buildings is output to realize the spatial layout planning of ecological buildings. The simulation results show that the spatial layout of ecological buildings using this method is more reasonable, and the expression ability of ecological aesthetics is stronger, which has a good application value in rural planning and design.

Method of parametric analysis of reciprocating electric generators with permanent magnets

A method for the parametric analysis of electric generators of reciprocating motion with permanent magnets has been developed, which allows revealing the values of the parameters of the magnetic circuit (cross-sectional area) and the working winding (number of turns) at a given value of the efficiency, providing a minimum specific gravity of the generator. The method of parametric analysis of electric generators of reciprocating motion with permanent magnets consists of three stages. The first and second stages are the electromagnetic calculation of the generator: at the first stage, the main geometric dimensions of the magnetic system and the parameters of the working winding of the generator are determined; at the second stage, the verification of the electromagnetic calculation of the generator, calculation of the nominal mode, calculation of the efficiency and assessment of the thermal state of the generator are fulfilled. At the third stage, a parametric analysis of electric generators of reciprocating motion with permanent magnets with specified constraints is carried out, as well as the refinement of the geometric dimensions and configuration of the magnetic system of the generator using a two-dimensional finite element model of the magnetic field. As a result, to ensure better use of the electrical steel of the magnetic circuit of the generator and thereby reduce its mass, the most saturated areas and areas, which are characterized by low values of the magnetic field strength, are determined. Distinctive features of the proposed technique are: the use of a minimum specific gravity of electric generators of reciprocating motion with longitudinal, transverse or combined changes in the magnetic flux passing through the working winding as an objective function; combined approach to electromagnetic calculation; taking into account the influence of the operating temperature on the parameters of the permanent magnet, as well as overheating of individual parts of the generator.

Research on dynamic splitting damage characteristics and constitutive model of basalt fiber reinforced concrete based on acoustic emission

In order to effectively utilize fiber reinforced concrete in engineering, it is necessary to investigate its mechanical properties and damage characteristics under dynamic tensile loads. This paper studied the effects of loading rate and fiber content on the tensile strength and acoustic emission (AE) characteristics of basalt fiber reinforced concrete (BFRC) in dynamic splitting tests. Brazilian disc splitting tests were carried out on the BFRC specimens with various fiber volume fraction (0%, 0.05%, 0.1%, 0.15%, 0.2%). Then the dynamic splitting AE characteristics were analyzed by means of parameter analysis method. Additionally, the stress–strain curves of BFRC were fitted by the constitutive model modified based on AE rate-process theory. The test results indicate that the tensile strength is enhanced with the increasing loading rate while adding basalt fibers has the same effect. Preferable fiber contents are 0.1% and 0.15%. Then it is found that loading rate and fiber content exert considerable impacts on the AE characteristics. Furthermore, the good fitting results suggest that the mechanics behavior of BFRC under dynamic splitting loads can be well described by the modified constitutive model.

Математична модель для визначення проєктних параметрів космічної надувної платформи з корисним навантаженням

The development and application of inflatable space structures is of considerable interest in modern space science and technology. Today, these structures enjoy wide application from aerodynamic inflatable deorbit means to inflatable residential sections for the International Space Station. This is because the masses of inflatable structures are smaller in comparison with others, which in turn minimizes the cost of their orbital injection. In view of the considerable interest in orbital constellations, the authors of this article propose the use of an inflatable space aerodynamic system as a platform for a payload. In doing so, we obtain a distributed satellite system on an inflatable space platform. The advantage of this technology is that it assures the maintenance of the relative position of the elements (payload) of a distributed satellite system of this type with minimal energy consumption. In its turn, to analyze the features of the operation of a particular space technology, its mathematical model is required. Because if this, the aim of the article is to develop a mathematical model for estimating the design parameters of an inflatable payload-bearing space platform. The mathematical model of the operation of an inflatable payload-bearing space platform developed in this work consists of three modules: a module of orbital motion, a module of calculation of the thermodynamic parameters of the inflatable platform, and a module of calculation of its variable inertia tensor. The article also identifies four gas modes of operation of the inflatable segment of the space platform and gives the inertia tensor as a function of the ambient temperature, which is necessary for further research. It should be noted that the application of the mathematical model allows a priori analysis of a wide range of inflatable space platform design parameters. On this basis, a design parameter analysis method that uses this model was developed. The application of this method may greatly simplify further research into the synthesis of an angular motion controller for an inflatable payload-bearing space platform, the choice of the design parameters of inflatable segment shell materials, and the study of the platform operation in different gas modes.

Genotype by Environment Interaction and yield Stability Assessment in new promising Cotton Genotypes by Parametric, AMMI and GGE Biplot Analysis Methods

Genotype by Environment Interaction and yield Stability Assessment in new promising Cotton Genotypes by Parametric, AMMI and GGE Biplot Analysis Methods

Thermodynamic performance analyses and optimization design method of a novel distributed energy system coupled with hybrid-energy storage

Several studies have novel distributed energy systems combining solar energy utilization and hybrid energy storage technology. However, the research on thermodynamic performance and optimization design of the novel system is still insufficient. Therefore, a novel distributed energy system uses a jacket water heat exchanger and a waste heat boiler to recover the waste heat of the internal combustion engine in turn and shares a water tank with the solar thermal collector in parallel. Then, the influence of different parameters on the thermodynamic performance of the system under variable working conditions is analyzed by the parametric analysis method. On this basis, an optimization design method considering the thermodynamic and economic performance of the novel system is proposed. The novel system is applied to a nearly zero-energy community with an electric vehicle charge load. The results show that the exergy efficiency, primary energy rate, and cost per unit supply area of the novel system in a typical year are 19.2%, 70.1%, and 5.4 $/m2, respectively. Therefore, the novel system is reliable and feasible in providing all kinds of energy to users.