Adaptive backstepping control for ship nonlinear active fin system based on disturbance observer and neural network

<span>Adaptive backstepping control based on disturbance observer and neural network for ship nonlinear active fin system is proposed. One disturbance observer is given to observe the disturbances of the system, by this way, the response time is shorten and the negative impact of disturbance and uncertain elements of the system is reduced. In addition, radial basic function neural network (RBFNN) is proposed to approach the unknown elements in the ship nonlinear active fin system, therefor the system can obtain good roll reduction effectiveness and overcome the uncertainties of the model, the designed controller can maintain the ship roll angle at desired value. Finally, the simulation results are given for a supply vessel to verify the successfulness of the proposed controller.</span>

Robust Adaptive Neural Cooperative Control for the USV-UAV Based on the LVS-LVA Guidance Principle

Around the cooperative path-following control for the underactuated surface vessel (USV) and the unmanned aerial vehicle (UAV), a logic virtual ship-logic virtual aircraft (LVS-LVA) guidance principle is developed to generate the reference heading signals for the USV-UAV system by using the “virtual ship” and the “virtual aircraft”, which is critical to establish an effective correlation between the USV and the UAV. Taking the steerable variables (the main engine speed and the rudder angle of the USV, and the rotor angular velocities of the UAV) as the control input, a robust adaptive neural cooperative control algorithm was designed by employing the dynamic surface control (DSC), radial basic function neural networks (RBF-NNs) and the event-triggered technique. In the proposed algorithm, the reference roll angle and pitch angle for the UAV can be calculated from the position control loop by virtue of the nonlinear decouple technique. In addition, the system uncertainties were approximated through the RBF-NNs and the transmission burden from the controller to the actuators was reduced for merits of the event-triggered technique. Thus, the derived control law is superior in terms of the concise form, low transmission burden and robustness. Furthermore, the tracking errors of the USV-UAV cooperative control system can converge to a small compact set through adjusting the designed control parameters appropriately, and it can be also guaranteed that all the signals are the semi-global uniformly ultimately bounded (SGUUB). Finally, the effectiveness of the proposed algorithm has been verified via numerical simulations in the presence of the time-varying disturbances.

THE DESIGN SYSTEM AND ITS FORMAL INFERENCE IN LOGO DESIGN

The communicative and cultural achievement is represented by an activity with adopted formulas confirmed by compliance and flexibility that enables it to keep pace with the creative path in the age of infomedia and contemporary digital publishing programs. The explanatory space, in its intellectual and technical forms, is based on logical foundations that work on creating latent patterns and patterns that enhance the purpose of its existence. And the system in art in general and design in particular represents a mechanism for arranging work vocabulary on the basis of principles that usually refer to a system that checks the state of damage between the design work vocabulary. The system stems from those defects embodied in expressive formats that are linked to concepts and ideas through the organization of different vocabulary within the workspace that have specific characteristics that reflect a particular idea and are linked to the specificity of the required utilitarian functional nature. The lesson of the system is not only to reach the relationships that exist between the vocabulary in their embodiment of the concrete form, but it lies on a much deeper level than that, which is the level of significance. Where the formal characteristics of the product of organizational relations reflect patterns that often express their environment or are the result of those organizations with semantic reading, and the difference in the nature of the formulation of these organizations comes from the effect of the overlap of several different factors (cultural, social, religious, civilizational, functional). The design thought derives its primary material through this overlap to start the system according to the rational methods in the drafting process. To evaluate things and this is the rule of logic. From here the researcher sees that the principle of the system and its relation to the degree of formulation of the form, and the extent of variation of this formulation is due to the mental readiness in the process of organization and innovation, to be a specific formal inference related to its basic function and its structural composition in the designs of logos, so the idea of research and formulation of the research problem came according to the following question: Is there a role for the design system in formal inference in logo design? The importance of the research was formulated through: -Informing those interested in the design issue, for the purposes of developing the mechanisms of their technical work. -To benefit scientific and research institutions, as well as the press, publishing houses, and advertising agencies. The aim of the research lies in: Knowing the role of the design system in formal inference in the design of logos, and defining the limits of research, which lies in the objective limit: the design system and formal inference in the design of logos Spatial limit: some Examples of global logos that enhance the current research, And the time limit for the designed logos from (2019-2021), and definitions of the following terms were defined: design system and formal inference.. Key words:

A Study On Impact Of White Goods Towards consumers Preference

The market’s level of competition has risen as a result of the advent of the overseas white goods industry. With rising earnings, dual-income families, changing lifestyles, credit availability, greater consumer knowledge, and the introduction of new models by Indian and multinational companies, India’s consumer durable sector is riding the crest of the country’s economic boom. As the Durable market is growing rapidly, an understanding of the consumer behavior regarding the characteristic of consumers in influencing their buying behavior is crucial. Consumer requirements of Air-condition, Washing machine and Refrigerator are at present not limited to its basic function but also on other values like – efficiency, ease of use and comfort. The consumer durables industry is marked by the growth of multinational corporations (MNCs), exchange offers, discounts, and fierce competition. MNCs have a 65 percent market share in the consumer durables industry. The expanding Indian middle class is a major focus for multinational corporations. They compete on the basis of a firm grasp on the local market, well-known brands, and a large distribution network, whereas Indian companies compete on the basis of a firm grasp on the local market, well-known brands, and a large distribution network. Consumer durables penetration, on the other hand, is still low in India. At this juncture, this study has been undertaken for to find out the impact and reality of white goods market in India.

Customer relationship management and higher education in India

Educational institutions worldwide are undergoing fundamental shifts in how they operate and interact with their “customers”, students, alumni, donors, and faculty members. Higher education, especially the management education has been changing rapidly and educational institutions are compelled to focus and shift their strategies on student community, faculty members, and industrial organizations so that they remain relevant to the society at large. A nation can remain competitive and its economy can continue grow, only if the quality of knowledge provided by higher education institutions becomes meaningful. Technological, economic, sociological, and governmental forces are altering education dramatically, impacting its institutions, teachers, students, funding sources, and basic function in society. To unlock potential and help talented people to gain advanced training, whatever their background, requires customer-centric approach to education.

ABOUT THE BASIC FUNCTION OF THE COURT IN BELARUS

The article analyzes the legislation of the Republic of Belarus for the legal regulation of the functions performed by the courts. The positions of the scientific community on this issue are presented. The conclusion is made about the prevalence of the main function for the court - the administration of justice. The modern forms of manifestation of the preventive and educational functions of the court are highlighted. The author's position on the issue of private rulings (rulings) issued by the courts is expressed.

Back to Life, Back to Reality: Participation and Function After Acute Hospitalization in Older Adults

This study aims to describe and compare functional trajectories (i.e., participation versus basic daily function) from pre-hospitalization period to one and three-months post-discharge, among older adults hospitalized for acute medical illness, of two age groups: ages 65-75, n=39, &gt;75, n=38. A Prospective longitudinal study was conducted, starting during hospitalization in internal ward and followed by home visits (1 month) and telephone interviews (3 months). Participation was measured by the Activity Card Sort (ACS) that queries about instrumental (e.g. shopping), leisure (e.g. physical activity), and social activities. Basic daily function was measured by the Modified Barthel Index (mBI). Wilcoxon test was used to compare between the ACS and mBI total retained scores within age groups. A mixed model repeated measures ANCOVA was used to compare time by group effects in ACS total scores. The results showed that basic function in both age groups was preserved, and both groups experienced a significantly greater decrease in participation level compared with basic function at one month (z=-4.1, p=.001, z=-4.5, p=.001) and at three months (z=-4.1, p=.001, z=-4.1, p=.001) in the “younger” and “older” groups, respectively. Participation trajectories were similar among age groups, however, the “older” group experienced a significantly greater decrease in participation (F(1)=(4.3), p=.042, η2= .056). Findings indicate that the traditional measure of basic function does not capture the broad spectrum of older adults’ full life and overshadows the reduced participation in meaningful activities. Health care professionals should adopt a comprehensive approach toward functional assessment to encompass participation beyond basic daily function.

Creating versatility in Thai demonstratives

Beyond their basic function to index exophoric and endophoric referents, Thai demonstratives have a host of pragmatic functions to encode concerns regarding discourse organization, subjectivity, and intersubjectivity. Based on a detailed analysis of demonstratives used in conversation, we attempt to uncover the pattern of grammaticalization for this class of words in Thai, and to propose a mechanism that allows them to develop multiple functions. Since demonstratives are indexical signs and are qualitatively distinct from content words, we must view the grammaticalization process of demonstratives differently from that of content words. In this paper, we use the model of the joint attention triangle based on Diessel’s earlier work and the functional utterance frame based on the “attractor position” analysis for grammaticalization of nouns and verbs advanced by Bisang (1996) to analyze how exactly demonstratives come to acquire pragmatic functions.

The Simulation of One-Step Algorithms for Treating Higher Order Initial Value Problems

The simulation of one-step methods using interpolation and collocation for the treatment of higher order initial value problems is proposed in this paper. The new approach is derived using interpolation and collocation as a basic function through power series polynomial, where the basic properties are also analyzed. The derived method is used to treat some highly stiff linear problems. The new approach compute clearly showed that the method is reliable, efficient and gives faster convergence when compared with those in literature.

Ethnocentrism, Theoretical Awareness, and Intellectual Resistance in University Students’ Reading Behaviour

This paper discusses the insightful and illuminating findings of teaching critical reading within the theoretical framework of critical pedagogy. More specifically, this paper examines the impact of a critical-reading course on students’ reading skills and beliefs about discourse production and interpretation. The course was conducted according to the principles of transformative participatory action research and, thus, a corpus of 50 essays, written by a convenience sample of 25 post-graduate students in the pre-test and post-test phases, was analyzed to examine the effect of the course on students’ reading-habits and their representations of different discourses. Pretest findings showed that most students used to think that discourses are innocent and ideology-free and that reading a text consists in understanding its general idea, extracting its writer’s viewpoint, making sense of its vocabulary, and paraphrasing it. As far as text’s function is concerned, most students used to believe that a text’s basic function is delivering information. In addition, most of them were unaware of the fact that a text has ideological and socio-political functions. Post-test findings revealed that students’ discourse awareness and reading habits have become more critical and developed at two levels: the worldview level and the meta-language level. The t-test statistics suggest that there is a significant difference of p˂.001 between students’ reading scores before and after the intervention. Therefore, the null hypothesis which says that there is no significant difference between studying critical reading from a critical pedagogy perspective and studying it from a functional or conventional perspective is false.