Principles Of Composition Research Articles

Dynamic behavior and modeling of icy lunar regolith subjected to dynamic loading

The icy lunar regolith (ILR) in the permanently shadowed regions (PSRs) of the lunar poles is an important lunar water resource for humans, which can be efficiently explored in situ by using a high-speed kinetic penetrator. The dynamic mechanical properties of ILR need priority research since they are related to the ballistics and overload of the penetrator. Based on ILR occurrence form and microscopic composition analyses, four types of ILR simulant (ILRS) specimens with typical water contents are prepared in the present study according to the principle of similar mineral composition and physical state. The dynamic mechanical properties of the ILRS specimens are investigated by combining the results of split Hopkinson pressure bar (SHPB), quasi-static unconfined compression, and variable angle shear (VAS) tests. The results show that the loading strain rates alter the microcrack number and expansion rate of the specimens, which in turn significantly affects their damage mode, dynamic uniaxial compressive strength (DUCS) and toughness ratio. Finally, based on the relationship between stress and strain in the SHPB tests, the damage properties of the ILRS under dynamic loading are analyzed, and a segmental constitutive model is provided by combining it with the Drucker–Prager strength theory. The research results could form the basis for subsequent penetrator structure design and ballistic prediction.

Intelligent Knife Switch Contact Status Monitoring Based on Special-Shaped Beam Fiber Bragg Grating Electromechanical Sensor

To ensure the safety of people’s lives and property, the accurate measurement of various small vibrations is of great significance. Using gratings as sensitive components to make optical fiber sensors is a kind of electromechanical vibration measurement device with rapid development. In this study, a special-shaped beam Fiber Bragg Grating (FBG) electromechanical vibration sensor with sensitized grooves is proposed based on equal-strength cantilever beams. The composition and implementation principle of FBG sensing system are expounded, and how to realize the signal induction of FBG under vibration conditions is further analyzed. According to the intrinsic relationship between sensitivity coefficient and natural frequency in vibration sensor, the sensor head structure composed of structural parameters, such as equal-strength beam length of 73 mm, bottom width of 14 mm, and thickness of 5 mm, is finally selected. With the help of ANSYS software to calculate the natural frequency of the sensing head as a theoretical reference value, and SS304 stainless steel is selected as the cantilever beam to obtain a good vibration sensing effect. In the test, the acceleration is set to 0.35 G, and the pulse generates a sinusoidal signal of 0–10000 Hz. The natural frequency of the sensing head is 182 Hz, and the sensitivity is 100 mV/G, which is only small error with the theoretical analysis value calculated by ANSYS. The acceleration of the sensing head is changed, and different degrees of vibration are generated. The results show that the change of output center wavelength has a linear relationship with the acceleration change. The introduction of sensitized grooved special-shaped beams helps to improve the sensitivity of the device to perceive vibration. It is used for the monitoring of the contact status of the intelligent knife switch. The results show that the designed photoelectric grating electromechanical sensor measurement has good repeatability, and the wavelength of the reflection interrogator will suddenly increase and decrease rapidly with obvious regularity.

AN ELECTRONIC ART APPROACH IN THE ADAPTATION OF WHITE SPACE ART COMPOSITION ON CHINESE INK PAINTING

White Space Art, otherwise known as Xu Shi, is not only used to create a powerful visual drawing space, but also a key composition principle and aesthetic feature in Chinese Ink Painting. This study focuses on the application of White Space Art in the implementation of the artwork. In other words, which initiatively to explore the method of combining the approach of technology with Chinese Ink Painting Art. Through the practical experience which executed by the author, intently to verify the feasibility if White Space Art to express the space philosophy of electronic art and discusses the possibility that the practical process can be used for further reference. The implementation of such a merger to achieve an artwork in the form of contemporary art which gives a new perception and meaning to the Chinese Ink Painting Art in a new context rather than in a conventional background.

Development and Verification of Wireless Vibration Sensors

Structural vibration testing is an effective guarantee for the Structural Health Monitoring (SHM) of large-scale civil engineering. Traditional vibration testing has drawbacks such as difficulties in wiring and picking up low-frequency signals, low communication speed, and susceptibility to testing site conditions. In order to improve the universality of wireless vibration sensors, this article develops a wireless vibration sensor, introduces the module composition and basic principles of the sensor, and conducts standard vibration table performance comparison tests between wired acceleration sensors and wireless vibration sensors, verifying the accuracy of wireless vibration sensors. In order to further explore the feasibility of wireless vibration sensor applications, the wired acceleration sensor and wireless vibration sensor were used to analyze the structural dynamic characteristics of the four-layer steel frame structure model in the laboratory, and the comparison was made based on ABAQUS finite element simulation. Finally, the field vibration test was carried out outdoors. The results show that the natural frequency identification results of the wireless vibration sensor and the wired acceleration sensor for the four-story steel frame structure through fast Fourier transform, short-time Fourier transform, and wavelet transform are basically the same, the half-power bandwidth method and logarithmic decrement rate method are used to identify the damping, and wavelet transform is used to identify the vibration mode with minimal error and high accuracy. It shows that the wireless vibration sensor is feasible in practical engineering, has stable and reliable transmission capacity, and can provide certain reference values for earthquake monitoring, building Structural Health Monitoring, etc.

Listy Gottloba Fregego. Uwagi o polskim wydaniu [rec. Gottlob Frege: Korespondencja naukowa

The present article reviews the Polish-language edition of Gottlob Frege’s scientific correspondence. In the article, I discuss the material hitherto unpublished in Polish in relation to the remainder of Frege’s works. First of all, I inquire into the role and nature of definitions. Then, I consider Frege’s recognition criteria for sameness of thoughts. In the article’s third part, I study letters devoted to the principle of semantic compositionality, while in the fourth part I discuss Frege’s remarks concerning the context principle.

Exploration of Teaching Reform in the Course of Computer Composition Principles Based on Engineering Education Certification

Exploration of Teaching Reform in the Course of Computer Composition Principles Based on Engineering Education Certification

Development of (Fe-Co-Ni)-Si-B metallic glass catalyst for promoting degradation of acid orange II azo-dye

Fe-based metallic glass (MG) catalyst, also called amorphous zero-valent iron (AZVI), is a functional material that has recently been in the spotlight due to its high reactivity compared to conventional catalysts for wastewater purification. In this study, novel Fe-based MG with excellent degradation rate and reusability was developed through systematic investigation by tailoring the contents of Co and Ni and structural design to form (Fe, Co, Ni)-rich clusters. We found that the process of dye degradation by a Fenton-like oxidative reaction with H2O2 can have low activation energy, assisted by a reductive reaction with nickel hydride formation. Consequently, the reductive and oxidative complex dye degradation mechanism can be effectively implemented to improve degradation rate and reusability, significantly superior to that of the commercial zero-valent iron(Fe0, ZVI) powder. Our findings revealed the compositional and structural key principles of Fe-based MG design, and are expected to provide new opportunities for industrial applications of advanced Fe-based MG.

Design and Analysis of the Composite Stability Control of the Reflective Optoelectronic Platform

To improve image object detection and tracking, researchers have been exploring methods to enhance the stability and precision of optoelectronic platforms’ line of sight (LOS). The innovation of stability mechanisms is the key driver of this breakthrough. This study presents a composite stability control system for reflective optoelectronic platforms using the integral composite stability principle. A platform kinematic model was established based on multi-body kinematic theory, and a composite stable control strategy was designed. The strategy includes coarse stability design and fine stability design based on residual error feed-forward correction. The performance of the control strategy was analyzed in terms of dynamics, current loop control effects, and loop structure. The proposed control strategy was simulated and experimentally verified for fixed-frequency angular velocity disturbance and translational disturbance. The stability accuracy index of the system was significantly improved after compensation, with improvement of more than 75 times for fixed-frequency angular velocity disturbance and more than 37% for translational disturbance. Comparative experimental results with traditional stable methods show that the proposed composite stable control strategy can significantly improve the system stability, with stability accuracy index improvement of one to two orders of magnitude in micro-radian units compared to traditional algorithms.

Theological Genealogies of Modernity: An Introduction

Theological Genealogies of Modernity: An Introduction

Machine composition of Korean music via topological data analysis and artificial neural network

Common AI music composition algorithms train a machine by feeding a set of music pieces. This approach is a blackbox optimization, i.e. the underlying composition algorithm is, in general, unknown to users. In this paper, we present a method of machine composition that teaches a machine the compositional principles embedded in the music using the concept of overlap matrix. In (Tran Mai Lan, Changbom Park & Jae-Hun Jung (2023) Topological data analysis of Korean music in Jeongganbo: a cycle structure, Journal of Mathematics and Music, DOI: 10.1080/17459737.2022.2164626), a type of Korean music called Dodeuri music has been analysed using topological data analysis (TDA). To apply TDA, the music data is first reconstructed as a graph. Through TDA on the constructed graph, a unique set of cycles is found. The overlap matrix lets us visualize how those cycles are interconnected in music. We explain how we use the overlap matrix for machine composition. The overlap matrix is suitable for algorithmic composition and also provides seed music to train an artificial neural network.

Design, optimization, and crosstalk analysis for robot joint torque sensor of shear beam structure.

Crosstalk resistance is an important criterion for evaluating the measurement error of the Joint Torque Sensor (JTS) in actual collaborative robot application, but few research literature studies on the crosstalk resistance of shear beam-type JTS have been found. This paper proposes a mechanical structure of one shear beam sensor and determines its strain gauge working area. Multi-objective optimization equations are established with three major performance indicators of sensitivity, stiffness, and crosstalk resistance. Optimal processing and manufacturing structure parameters are obtained by employing both the response surface method based on the central composite design experimental principle and the multi-objective genetic algorithm. By simulating and experimenting, the optimized sensor is verified and has the following indices: overload resistance 300% F.S., torsional stiffness 503.44 KN m/rad, bending stiffness 142.56 KN m/rad, range 0-±200 N m, sensitivity 25.71 mV/N m, linearity 0.1999%, repeatability error 0.062%, hysteresis error 0.493%, measurement error less than 0.5% F.S. under Fx (392.4 N) or Fz (600 N) crosstalk load, and measurement error less than 1% F.S. under My (25 N m) moment crosstalk. The proposed sensor possesses good crosstalk resistance and especially axial crosstalk resistance and has good overall performance to meet well the engineering requirements.

Health Assessment of Flow Meter Calibration Device Based on Fuzzy Comprehensive Evaluation

In view of the rapid development of related technologies in the field of computer and artificial intelligence at home and abroad, the health maintenance mode of the existing flowmeter calibration device is still very lagging behind. The actual composition structure and principle of the device are studied to determine the multi-level evaluation index of the device. Using the actual operation data of the calibration pipeline, the parameter feature vector is extracted as a healthy sample. By calculating the combined weight and fuzzy membership matrix of evaluation indexes at all levels, the membership matrix of health status is solved, and the health status of equipment is classified and evaluated according to fuzzy logic. The example analysis shows that the method can reflect the real health status of the equipment to a certain extent and improve the timeliness of the health assessment of the calibration device.

Designing organic pseudocapacitors through molecular hybridization

In this issue of Joule, Dincă and co-workers showcase a fused aromatic organic electrode material that exhibits remarkable physicochemical properties, such as high electrical conductivity, rapid ion transport, and insolubility in the electrolyte. As a result, the material functions as an excellent pseudocapacitive material that can efficiently store and discharge energy in a short period of time. In this issue of Joule, Dincă and co-workers showcase a fused aromatic organic electrode material that exhibits remarkable physicochemical properties, such as high electrical conductivity, rapid ion transport, and insolubility in the electrolyte. As a result, the material functions as an excellent pseudocapacitive material that can efficiently store and discharge energy in a short period of time. High-rate, high-capacity electrochemical energy storage in hydrogen-bonded fused aromaticsChen et al.JouleApril 17, 2023In BriefShortening the charging time for electrochemical energy storage devices, while maintaining their storage capacities, is a major scientific and technological challenge in broader market adoption of such devices. Fused aromatic molecules with abundant redox-active heteroatoms, extended conjugation, and intermolecular hydrogen bonding serve as electrode materials that enable high-rate, high-capacity charge storage. The structural and compositional principles underlining their electrochemical performance provide important blueprints toward the use of organic pseudocapacitive materials in practical, high-rate, high-capacity electrochemical energy storage devices. Full-Text PDF

МУЗЕЙНАЯ АРХИТЕКТУРА В ЭПОХУ МУЛЬТИМЕДИА. НОВЫЕ ПОДХОДЫ В ТИПОЛОГИИ

This study actualizes the need for a fundamentally new museum space for the conditions of modern society thanks to multimedia technologies. In connection with the emergence of digital opportunities that allow not only to popularize museums, but also to create new enlightening and educational spaces, it has become necessary to transform the museum environment as a whole. The issue of the introduction of multimedia technologies in museums, and, subsequently, the formation of a new space-planning structure, is currently relevant, as it reflects the changing requirements put forward by modern society, which in turn is confirmed by a significant number of new implemented objects equipped with digital technologies. On the example of the world experience in designing and building modern museums, the distinctive features that meet modern requirements are highlighted: the multifunctionality of the object with an emphasis on the entertainment function, the use of interactive multimedia technologies, the introduction of open indoor and outdoor spaces for recreation and communication, as well as taking into account the requirements of people with limited mobility and the introduction energy efficient devices. Approaches are generalized and types of premises are specified by groups. The principles of designing modern museums to enhance the significance are formulated: the principle of society, the principle of significance, the principle of composition, the principle of efficiency. Also, an experimental project of the museum in Samara was developed, which confirmed the relevance and prospects for the introduction of multimedia technologies in museums.

КОМПОЗИЦИОННЫЕ ОСОБЕННОСТИ АРХИТЕКТУРЫ РУССКОГО СТИЛЯ ГОРОДА ВОРОНЕЖ

The article outlines the role and significance of the period of the Russian style in the historical development of the city of Voronezh. The stages of the development of the Russian style from the middle of the XIX – early XX centuries in the city of Voronezh and their characteristic regional features are considered. For the first time, a comprehensive analysis of the architectural buildings of the Russian style of Voronezh is carried out to identify the techniques of spatial composition, architectural planning solutions, compositional construction and artistic methods of facade design. Particular attention is paid to stylistic, compositional and morphological analyses of architectural details of building facades and decor. The research of the composite structure of facades is based on the scientific methodology developed by S.V. Sementsov, which allowed to analyze the facade construction system and present a comparative analysis of two periods of the development of the Russian style. The compositional principles of the axial construction of facades, the analysis of rhythm and meter, the breakdown of the facade into horizontal and vertical divisions, the location of plastic decor and the choice of color solutions are described. Then, on the basis of the theory of architectural forms, a morphological analysis of the architectural decor of buildings was carried out: crowning elements, window and door frames. The characteristic facade forms for the architecture of the Russian style of Voronezh are revealed, the variants of their layout and the varieties of building materials used are analyzed.

A defence of the austere view of nonsense

The austere view of nonsense says that the source of nonsense is not a violation of the rules of logical syntax, but nonsense is always due to a lack of meaning in one of the components of a sentence. In other words, the necessary and sufficient condition for nonsensicality is that no meaning has been assigned to a constituent in a sentence. The austere conception is the key ingredient of the resolute reading of Tractatus Logico-Philosophicus that presents a therapeutical interpretation of the work, and rejects a possibility of conveying some ineffable truths by means of nonsensical sentences. In this paper, I defend the austere view against the most important objections. Firstly, I discuss textual sources for ascribing to Wittgenstein the austere view that have not been sufficiently thoroughly discussed yet. Next, I indicate that the apparent occurrence of words out of the context of a sentence on lists of verbs and in definitions is not in conflict with the version of the context principle recommended by austere theorists, since this argument does not sufficiently take into account the distinction between sign and symbol. Furthermore, I argue that the austere conception and the principle of compositionality are jointly tenable, for the former view does not exclude the existence of syntactic and semantic rules, but only shows that they are recognizable conditionally. Finally, I indicate that the austere view of nonsense should be seen as a viable option by a contemporary theorist of nonsense, for it helps us to avoid making controversial assumptions about the nature of meaning and content.

Fault diagnosis and analysis of hydraulic brake based on friction vibration signal

The friction vibration signal corresponding to different fault types of brakes is significantly different, thus a hydraulic disc brake fault diagnosis and judgment scheme based on vibration signal detection was proposed and validated in the paper. According to the composition and electric control principle of hydraulic brake, the vibration signal detection and brake pressure control strategies were established. The key hardware and isolation circuit of the detection system were designed, which can effectively improve the stability and anti-interference ability in the process of vibration data acquisition and transmission with SPI and CAN bus communication scheme. In order to eliminate noise interference in friction vibration signal and improve the accuracy of fault diagnosis with advantage, wavelet threshold denoising method was applied to brake disc vibration signal processing. The denoised signal can be obtained by inverting the selected wavelet coefficients to separate the useful components of the signal from the invalid noise. For the research on the correlation between fault types and vibration signal characteristics, a friction vibration test bench for hydraulic braking system was built to obtain and process the output signal from vibration sensor. The frequency spectrum response laws of vibration signals were compared and analyzed when the brake disc was normal and had surface defects, including microcracks, excessive wear and fatigue peeling. The external parameters such as brake pressure and spindle speed were keeping constant, thus eliminating the influence of working factors on vibration characteristics. In order to study the influence of brake pressure failure on friction vibration, the variation law of vibration signal is compared and analyzed under the condition of hydraulic valve leakage and pressure maintaining failure. The results show that the friction vibration signal can be used as an effective basis for judging the surface defects and brake pressure faults of brake discs. Under the condition of wavelet threshold denoising, accurate and effective vibration parameters can be obtained, which is of great significance to the safety and reliability of the braking system.

Цвет в объектах садово-паркового искусства как средство создания выразительного общественного пространства

The most important meaning of color in landscape art as a tool for harmonizing the spatial structure of public spaces and its application pecularities are considered. The outstanding masters’ experience of the past and modernity is analyzed. The compositional principles of the space components interaction using color and light, climate, shape, material, texture, vegetation are considered. The actual methods of applying color in practice from the semantic component to the coloristic solution in the form of contrast and nuance as expressive means are characterized. A study of the psychological and physiological effects of the color palette on the human senses was made. Recommendations are given for creating a comfortable attractive public space through the competent use of color as an art and science. Thus, the correct science-based color harmonies and landscape-visual design of objects are created.

중세 유럽 문장(紋章)의 디자인, 구성, 상징

This study analyzes the principles of composition and symbolic meanings of university heraldry and guild heraldry in medieval Europe based on the concept of Thick Discription of Clifford Geertz, a champion of symbolic anthropology. Thick Discription is one of methodologies of cultural studies that helps to demonstrate cultural symbols and signs in the context used. It enables to elucidate complex conceptual structures, many of them superimposed on or knotted into one another, which are strange, inconstant and concealed. We will infer how medieval heraldry as a symbolic sign influences modern visual culture, especially symbol marks because modern university symbols and corporate logos have been rooted in medieval university heraldry and guild heraldry respectively. This paper provides useful academic materials that visual designers and design researchers can refer to.

프랙탈 기하학 차원에서 본 자하 하디드 건축작품의 공간형태특성에 관한 연구

This study utilizes fractal geometry, which is evaluated as a new alternative in the field of science, to interpret and apply complex and diverse architectural phenomena in the field of architectural design to create multi-dimensional space forms and respond to users' unpredictable and flexible demands. We want to explore the possibilities of whether it can be used with various algorithms that can be used.
 In this process, we tried to understand the concept, characteristics, and compositional principles of fractal geometry, and to interpret the creation process of spatial forms in Zaha Hadid's architectural works erected after the 2000s from the perspective of fractal geometry. In addition, we tried to explore the possibility of application to contemporary architecture by proposing the aspects of the architect's fractal characteristics through diagrams and analyzing the proportion of utilization of various algorithms to propose them as a mechanism for creating spatial forms.