Traditional Structure Research Articles

PCBM Constructing Heterojunction for Efficient CsPbI3 Perovskite Quantum Dot Solar Cells.

CsPbI3 perovskite quantum dots (PQDs) have emerged as promising photovoltaic materials for third-generation solar cells, owing to their superior optoelectronic properties. Nevertheless, the performance of CsPbI3 PQD solar cells is primarily hindered by low carrier extraction efficiency, largely due to the insulative ligands. In this study, we introduced a semiconductor molecule, [6,6]-phenyl C61 butyric acid methyl ester (PCBM), onto the surfaces of CsPbI3 PQDs as surface ligands to enhance photogenerated charge extraction. The results indicate that PCBM accelerates carrier separation in CsPbI3 PQDs by forming a type II heterojunction, and also modulates the energy level of CsPbI3 PQDs by altering surface dipole moments. Additionally, we established an energy-level gradient alignment in the PCBM/CsPbI3 PQD heterojunction absorber layer, which was found to effectively promote carrier extraction and reduce carrier recombination loss in PQD solar cells. Ultimately, the PQD solar cells incorporating this novel structure achieved a power conversion efficiency of 14.23%, a significant improvement compared to 12.69% achieved by solar cells with a traditional structure, thus demonstrating the strong potential of this approach for high-performance PQD solar cells.

The Impact of Perceived Platform Interactivity on Customer Value Co-Creation ----Exploring the Mediating effects of Customer Inspiration and the Moderating effects of ethical perceptions

As the digital economy progresses, community group buying has emerged as a novel social retail model, reshaping traditional business structures. Customers play an increasingly pivotal role in the process of value creation, with their perceived value dictating market orientation and serving as the focal point for corporate value creation. However, effectively fostering customer co-creation of value remains an unresolved critical issue in this field. Diverging from previous studies, this research adopts an individual perception-based approach, employing social cognitive theory to construct an integrated theoretical model that explores how perceived platform interactivity influences customer co-creation behaviors. Data were collected through surveys conducted in Nanchang and Changsha, yielding 557 valid responses. Structural equation modeling was used for empirical analysis. The results indicate that perceived platform interactivity significantly positively affects customer participation behavior (β=0.503, p<0.001) and customer citizenship behavior (β=0.457, p<0.001). Customer inspiration plays a partial mediating role between perceived platform interactivity and value co-creation behaviors. Moreover, moral perception positively moderates the impact of perceived platform interactivity on value co-creation. This study not only enriches the theoretical exploration of customer value co-creation in the platform economy but also confirms that customer inspiration can supplement social cognitive theory's motivational constructs, expanding the theory’s applicability in digital marketing. The findings offer practical guidance for optimizing interaction design on community group buying platforms and stimulating creative customer engagement.

Yoruba Indigenous Music as Alternative Tool for Child Education

Since music is a component of culture, it is essential to education. The importance of Yoruba traditional music in their education cannot be overstated, since the goal of education is to develop a child who is capable of being a productive member of society and who complies with social norms and customs. Given that traditional beliefs, rituals, norms, and social structures are often the foundation of musical notions and practices, the effects of Yoruba music on children become increasingly plausible. This cultural phenomenon research is necessary because of the connections between music, culture, and education. This study looks at how a Yoruba child's education was impacted by the shape, lyrics, and performing techniques of indigenous music. It will also provide a fitting explanation of the background of Yoruba music. A few chosen pieces of indigenous music were examined to establish the use of indigenous music as alternative tool historical, arithmetic, moral and health education. This study concludes that the inherent worth of indigenous music is a useful and alternative tool for teaching Yoruba children, especially in early childhood education. The study suggests that Yoruba people should value the singing of Indigenous music in their homes, community and that indigenous music should be incorporated into the curriculum and taught in elementary, secondary, and higher institutions.

When Trans met Discipline: scenes from an arranged marriage

Transdisciplinarity is all the rage! This spirited statement, or announcement even, rings true of the contemporary intellectual landscape. The amalgamated term/concept proposes a means to breakdown traditional boundaries, encourage collaboration outside of staid academic spaces and in doing so become a key driver for innovation. Many have bought into this promise. However, amidst the fervour for the promise of fluidity of knowledge and interdisciplinary exchange lies a productive tension between the principles of transness and the inherent fixity of traditional disciplinary structures. Etymologically, they sit on opposites ends of a spectrum indicating flux and fixity. What kind of union does this term portend? What is liminal, or overlooked in the composition these opposing forces? Our provocation aims to take on a playful troubling in what observe as a limitation of the scope of transdisciplinary work. Drawing on critical perspectives from trans and queer studies, discipline-making and un-disciplining and the energies that heralded the birth of transdisciplinarity, our provocation plays with the tacit ways in which power structures, historical legacies, and implicit biases continue to operate spaces that claim transdisciplinarity. We aim to argue for a more thorough understanding of the interplay between fixity and fluidity, highlighting how acknowledging these dynamics can lead to an expanded palette of work that can leap beyond the current practices of engaged scholarship towards the speculative and outrageous. Through a series of conversations with texts, theorists and activists, our contribution will work to make productive mischief from the periphery.

A discretized representation for Monte Carlo simulation of deformed semiflexible chains.

In this study, we present a novel orientation discretization approach based on the rhombic triacontahedron for Monte Carlo simulations of semiflexible polymer chains, aiming at enhancing structural analysis through rheo-small-angle scattering (rheo-SAS). Our approach provides a more accurate representation of the geometric features of semiflexible chains under deformation, surpassing the capabilities of traditional lattice structures. Validation against the Kratky-Porod chain system demonstrated superior consistency, underscoring its potential to significantly improve the precision of uncovering geometric details from rheo-SAS data. This approach opens new avenues for investigating the conformations of semiflexible polymers and mechanically induced phase transitions in more complex polymer structures, offering deeper insights into their behavior under various conditions.

China's Low-carbon Energy Transformation: Development of Renewable Energy

In recent years, as the world's population continues to increase, it has brought a series of pollution problems, which causes global warming intensified. In order to solve the problem of climate warming, the development trend of low carbon and environmental protection is gradually becoming the keynote of global social and economic development. At the same time, due to the excessive reliance on energy consumption for the development of China's economy in the past, the problems of energy shortage and environmental degradation have become more and more serious in China in recent years. Therefore, the carbon emission reduction index has become one of the important assessment indicators for the development of China's economic quality and an unavoidable key task for economic development. Energy is the basis of economic and social development, in the process of economic development, China will inevitably encounter energy shortages, environmental pollution problems, the development of renewable energy has become a general trend, the transformation and optimization of the traditional energy structure is an effective way to achieve this goal and an important means. This paper analyzes and puts forward suggestions on the current situation of China's energy transition, factors affecting energy transition and future development trends through the literature review method and comparative analysis method.

A Study of the Impact of Social Media on Family Structure Change

With the rapid development of Internet technology, social media has become an indispensable part of modern society. The popularization of social media has profoundly affected all aspects of family life, and traditional family structures and interaction patterns are facing unprecedented challenges and opportunities. The impact of social media on family structure is a complex process, which not only breaks down geographical boundaries to a certain extent and creates opportunities for family members to strengthen their ties with each other, but also reduces the number of face-to-face exchanges to a certain extent, which obviously affects the mode of communication and frequency of interaction of modern families. In such a context, it is of great theoretical and practical importance to study in depth the changing family structure in the era of social media. This study aims to explore and reveal the influence of social media on family power structure, boundary function and emotional identity from different perspectives through the questionnaire method, so as to grasp the law of change of family structure in the era of social media. Through this study, it can be found that the current development of social media plays a role in reshaping and negotiating boundaries, as well as changing and balancing the power structure of Chinese families.

Intellectual structure of disruptive innovation: a bibliometric analysis and systematic review

PurposeDisruptive innovation is regarded as an important engine of the new technological revolution, which can change the traditional market structure and business model completely. Articles on disruptive innovation remain fragmented and heterogeneous in terms of theoretical paradigms and empirical studies. For the purpose of further understanding about disruptive innovation, and to recognize its evolutionary trajectory and research trends, this paper provides a systematic literature review.Design/methodology/approachBased on data from Web of Science a total of 1,415 articles were collected to identify productive countries, prominent journals, influential authors and main sub-fields on disruptive innovation. Additionally, important articles are analyzed for content.FindingsThere is an overall increasing trend in the number of articles, a uniformity of highly productive authors and countries and a primary concentration in business and management journals. Moreover, six research clusters are identified and an antecedent-decision-outcome framework is constructed to categorize significant studies.Practical implicationsThis paper outlines the key focuses of the field: application and adoption of disruptive technology, identifying and responding to disruptive innovation, commercialization of disruptive technology, disruptive innovation strategies and disruptive business models.Originality/valueThis paper combines bibliometrics and content analysis to systematically overview disruptive innovation research.

Digital Twin-Based Smart Feeding System Design for Machine Tools

With the continuous development of intelligent manufacturing technology, the application of intelligent feed systems in modern machine tools is becoming increasingly widespread. Digital twin technology achieves the monitoring and optimization of the entire life cycle of a physical system by constructing a virtual image of the system, while neural network controllers, with their powerful nonlinear fitting ability, can accurately capture and simulate the dynamic behavior of complex systems, providing strong support for the optimization control of intelligent feed systems. This article discusses the design and implementation of an intelligent feed system based on digital twins and neural network controllers. Firstly, this article establishes a mathematical model based on the traditional ball screw structure and analyzes the dynamic characteristics and operating mechanism of the system. Subsequently, the mathematical model is fitted using a neural network controller to improve control accuracy and system response speed. The experimental results demonstrate that the neural network controller shows good consistency in fitting traditional mathematical models, not only effectively capturing the nonlinear characteristics of the system but also maintaining stable control performance under complex operating conditions.

Comparing numerical simulation methods for evaluating hysteretic response of self-centering shear walls reinforced with SMA-ECC under cyclic loading

Under the action of earthquake, the traditional shear wall structure has the problems of excessive residual deformation and macroscopic cracks. The SMA-ECC composite material formed by the combination of smart materials such as shape memory alloy (SMA) and high ductility engineered cementitious composite (ECC) not only has good energy dissipation capacity, but also can obtain superior self-centering ability and damage self-healing ability, thereby improving the seismic performance and durability of shear wall structures. In this paper, in order to explore the nonlinear behavior of the self-centering shear wall under earthquake action and accurately simulate it, ECC and SMA material tests are carried out to establish the uniaxial constitutive relationship of the material. Using OpenSees finite element analysis platform, considering the micro and macro perspectives, a variety of finite element models are established, namely layered shell model, fiber model and multi-vertical rod model. Combined with the low-cycle reciprocating loading test of shear walls, the numerical simulation results are compared with the experimental data. By considering the parameters such as yield load, peak load and simulation time, the feasibility, stability and calculation efficiency of these models are evaluated. The results show that among the three models, the model based on fiber element can capture well the hysteretic response of new materials, and simulate the hysteretic performance, pinch effect and stiffness degradation of various shear wall members. The simulated values and experimental values can be well matched. Compared with the microscopic model, the computational efficiency of the fiber model is greatly improved, and the model has good feasibility, accuracy and efficiency.This work provides a basis for further research on the optimization of design parameters of SMA-ECC shear wall.

Time-division multiplexing cascaded active phase-locking method for an all-fiber coherent beam combining system

Coherent beam combining (CBC) is an effective approach to exceed the power limitation of fiber lasers by combining multiple laser sources. Phase-locking is one of the important steps in an active CBC system. Many phase-locking methods have already been developed and have effectively achieved phase control. Generally, the phase control bandwidth decreases accordingly as the number of combined lasers increases. This will hamper the development of CBC systems to larger scales. At the same time, the structure of traditional tiled-aperture CBC systems is also a potential limiting factor in the aspect of feedback configuration. An all-fiber CBC structure based on active phase control can avoid physical size limitations on traditional structures and greatly expand the scale of tiled-aperture CBC arrays to over tens of thousands of sub-beams. In such a large array scale, existing phase control methods will inevitably encounter the problem of bandwidth reduction. To solve this problem, we propose a time-division multiplexing cascaded (TDMC) active phase-locking method in this paper. Simulation studies on phase control of over 10,000 laser beams are conducted. The method shows huge bandwidth enhancement in control phases of a large number of lasers. This will lay the technological foundation for further expanding the number of an all-fiber tiled-aperture array.

Bio‐Inspired Graded and Uniform Cylindrical Lattices Fabricated by Material Extrusion 3D Printing: An Experimental and Numerical Investigation

ABSTRACTThe main requirements of the biomedical and aerospace industries are new and innovative lightweight materials. Bio‐inspired structures, which are inspired by various biological designs, have demonstrated notable advancements over traditional lightweight structures. In this study, bioinspired uniform and graded cylindrical triply periodic minimal surface (TPMS) and strut‐based lattice structures were studied for their mechanical qualities and energy absorption capacities fabricated by material extrusion 3D printing using PLA material. It was found that the cylindrical TPMS diamond lattice achieved maximum stress of 78.5 MPa and absorbed 19.14 MJ/m3 of energy, outperforming strut‐based designs with a 48% higher energy absorption than cylindrical BCC lattice structure. Graded designs further improve energy absorption through a better stress distribution. The findings validated the Gibson–Ashby model, highlighting the enhanced load distribution and stress transfer in the strut‐based and TPMS diamond structures. The finite element (FE) model results closely matched the experimental data, confirming its predictive reliability with a maximum error of energy absorption of 7.7%, elastic modulus of 6.9%, and plateau stress of 4.7%. These insights underscore the superior energy absorption and mechanical stability of cylindrical TPMS diamond lattices, indicating their potential for satisfying stringent industrial and technical performance requirements. The novelty of these designs lies in their bioinspired structures and significant enhancements in mechanical performance and energy absorption. Future research should build on these results to design efficient materials tailored to specific needs using FE models to optimize development processes before experimental testing.

Study on the Impact Resistance of the Honeycomb Composite Sandwich Structure by a Fragment Flight Angle

At present, the typical targets in the air are mainly high-speed impact bodies such as fragments, which pose a great threat to aviation equipment such as drones. It is urgent to study the impact resistance of different initial conditions of fragments to honeycomb sandwich structures. The fragment impact experiment analyzes the fragment flight attitude, fragment power, failure mode, and impact resistance of the structure by changing the different impact velocities on the target plate. In order to study the damage mode and anti-damage performance of several composite honeycomb sandwich structures under oblique penetration impact mode, a total of six groups of composite honeycomb structures were tested by fragment impact sandwich structure at different angles, and the damage law of composite honeycomb sandwich structure in the experiment was compared and analyzed. According to the experimental results, the accuracy of the theoretical model and numerical simulation was verified by fragment impact composite honeycomb sandwich structure. The analysis results show that the failure mode of the composite honeycomb sandwich structure under oblique impact is quite different from that of the traditional structure, which is mainly reflected in the material accumulation type of the failure part. Compared with the traditional structure, the composite honeycomb sandwich structure exhibits better energy absorption efficiency, which is increased by 130% and 600%, respectively. This paper shows the different failure modes of honeycomb sandwich structure under oblique impact and positive impact. The existence of an inclined angle changes the failure mode, increases the damage range, and increases the total energy absorption. It is necessary to further study the failure mechanism of fragment flight angle on honeycomb sandwich structure and provide a reference for the impact resistance design of the structure.

DCFU‐Net: Rethinking an Effective Attention and Convolutional Architecture for Retinal Vessel Segmentation

ABSTRACTMorphological changes in retinal vessels are early indicators of cardiovascular and various fundus diseases. However, accurately segmenting thin blood vessels remains a challenge due to the complexity of the vascular structure and the irregularity of pathological features. This paper proposes a dual chain fusion U‐Net (DCFU‐Net) for the precise segmentation of retinal vessels. The network consists of a multi‐level segmentation network and a fusion network. The multi‐level segmentation network is designed with a dual chain architecture to generate segmentation results for both thick and thin vessels simultaneously. The fusion network combines the segmented thin and thick vessels with the original image, facilitating the generation of accurate segmentation outcomes. Notably, traditional convolution structures in the DCFU‐Net are replaced by dynamic snake convolutions (DS‐Conv). DS‐Conv is designed to adaptively focus on slender and tortuous local features, accurately capturing vascular structures. The shared weight residual block, integrating DS‐Conv and residual structures, which is called DS‐Res block. It serves as the backbone of the DCFU‐Net, enhancing feature extraction capabilities, while significantly reducing computational resource consumption. Additionally, this paper rethinks effective components of the Transformer architecture, identifying the inverted residual mobile block (IRMB) as a key element. By extending the DS‐Conv‐based IRMB into effective attention‐based (EAB) blocks, the network mitigates the loss of semantic information, thereby addressing inherent limitations. The DCFU‐Net is evaluated on three publicly available datasets: DRIVE, STARE, and CHASE_DB1. Qualitative and quantitative analyses demonstrate that the segmentation results of DCFU‐Net outperform state‐of‐the‐art methods.

Des triangles diffus, entre échec queer et Anti-Œdipe : technique, métapsychologie et politique psychanalytique

ContextThis article explores the interactions between psychoanalysis, queer theory, and the political and clinical implications of critiques against the Oedipus complex, particularly through the works of Deleuze, Guattari, and Halberstam. It aims to analyze how alternative theoretical perspectives, drawn from social and cultural criticism, can renew classical psychoanalytic approaches, particularly in addressing traditional symbolic structures. ObjectivesThe main objective of the article is to question the current relevance of the Oedipus complex in psychoanalytic practice, in light of critiques from queer and post-structuralist theories. It seeks to demonstrate that the failure of the Oedipal paradigm can be seen not as an obstacle but as a path toward theoretical and clinical renewal, opening up new perspectives on subjectivities and social dynamics. MethodThe author employs a theoretical analysis, based on a cross-reading of Deleuze and Guattari's works, notably Anti-Oedipus, and Jack Halberstam's studies on failure in queer culture. The article integrates examples from both popular culture and philosophical reflections to illustrate how failure and non-conformity can become critical tools within the framework of psychoanalysis and clinical practice. ResultsThe analysis shows that the critique of Oedipus, as elaborated by Deleuze and Guattari, and the valorization of failure by Halberstam, offer relevant perspectives for rethinking psychoanalytic practice. By rejecting developmental teleology and normative success, these theories allow for an expansion of psychoanalytic praxis, opening it up to more fluid forms of existence and subjectivity, less bound by heteronormative and capitalist expectations. They also facilitate the inclusion of subjects traditionally marginalized, such as sexual and gender minorities, within a more inclusive vision of psychic care. InterpretationThe article argues that psychoanalysis, if it remains anchored in a rigid reading of the Oedipus complex, risks becoming entrenched in a conservative framework that limits its clinical scope. However, an openness to radical critiques, particularly those emerging from queer theory and social critiques of family and gender, can revitalize psychoanalytic practice and enable it to address contemporary issues. Failure, rather than being seen as a shortcoming of the subject or therapy, can be embraced as a critical stance that challenges social norms and opens up possibilities for subjective and collective reinvention.

Seismic fragility analysis of traditional Chinese timber structures based on a simplified lumped mass model considering joint damage

Seismic fragility analysis of traditional Chinese timber structures based on a simplified lumped mass model considering joint damage

Identifying Practical Material Retrofit Measures for Energy Efficiency in Existing High-Rise Buildings in the Malaysian Climate

With the global focus on sustainable urban development, many cities are striving to formulate effective urban transformation strategies to transition from traditional urban structures to more sustainable ones. Enhancing the energy efficiency of buildings, particularly existing structures, is recognized as a crucial element in the fight against climate change. In the Malaysian context, improvements in energy consumption are predominantly propelled by retrofitting the country's existing building stock. However, targeted strategies are needed, especially for high-rise buildings, to address the unique challenges posed by the Malaysian climate. This study addresses this gap by focusing on retrofitting strategies specifically tailored for existing high-rise buildings in Malaysia. To evaluate energy efficiency accurately, a selected case study underwent modeling and simulation using Building Information Modeling (BIM) software for energy analysis. The simulation considered crucial aspects of window materials: U-factor, solar heat gain coefficient, visible transmittance, and emissivity. The study identified triple-glazed windows as the most energy-efficient choice, significantly outperforming single-glazed windows due to their lower U-factor and improved insulation properties. Light concrete bricks for walls demonstrated superior heat resistance owing to their lower density. Steel bar joists were found to enhance heat transfer efficiency in roofs. The recommended materials showed promising results, achieving a calculated energy consumption reduction to 266 kWh/m2/year. The study emphasizes that green consultants prioritize elements addressing excessive energy consumption during building upgrades, influencing their choice of retrofit options. Implementing energy-efficient retrofits can significantly reduce buildings' energy dependence, contributing to a substantial decrease in the country's overall energy consumption.

Study on Shape Optimization of Air-Supported Membrane Gymnasiums in Cold Regions Based on Indoor Daylight Simulation

ABSTRACT Air-supported membrane gymnasiums are gaining popularity in cold regions due to their rapid construction, low energy consumption, and cost-effectiveness. However, their natural translucency leads to excessive indoor daylight and discomfort, posing challenges compared to traditional structures. This study investigates the indoor daylight performance of air-supported membrane gymnasiums in cold regions. Through computer simulation, key daylight indicators were identified, a typical model was developed, and its accuracy was verified through empirical measurements. Based on these findings, shape optimization suggestions are proposed to enhance indoor daylight quality, promoting a healthier sports environment. The insights from this study are expected to inform future design practices for similar facilities.

Research on the Performance of Carbon Fiber Composite Railings for Ships

With the development of the shipbuilding industry, the requirements for the safety and corrosion resistance of ship structural components are becoming increasingly high. Most of the components used in traditional ships are made of steel, which cannot meet the requirements of corrosion resistance and safety for existing ships. In order to improve the structural safety and corrosion resistance of ship railings, as well as their lightweight requirements, this article proposes a lightweight design for ship railing structures based on the advantages of carbon fiber composite materials, such as light weight, high strength, and high modulus, on the basis of the existing traditional metal railing structures for ships. Based on the anisotropy of carbon fiber composite fibers, the characteristics of overlapping/weaving structures, and the influence of the interface between carbon fiber composite materials and metal materials on the strength of ship railing structures, a finite element simulation model of carbon fiber composite materials is established. By setting constraints such as volume fraction, stress, strain, displacement,etc.in the given simulation model, the layout of materials in the optimization results is used to guide the design of the structure, and the size parameters of the ship railing barrel are optimized for structural optimization. Thus achieving lightweight design of ship railings and meeting the requirements for lightweight, safety, service life, and corrosion resistance of ship structural components.

Hollow MoS2-Co3S4 heterostructures derived from ZIF-67 as saturable absorber for generating gigahertz repetition frequency mode-locked fiber lasers

In practical applications, high repetition frequency (HRF) lasers are widely used in the fields of material processing, laser communication and medical therapy. In this work, the passive harmonic mode-locked (HML) technique is used to realize a HRF fiber laser in GHz level, effectively overcoming the limitations of traditional fiber laser structures. In order to maximize the advantages of nanomaterials, we synthesized high-purity hollow MoS2-Co3S4 heterojunction materials by hydrothermal method. Then, a “sandwich” structure saturable absorber (SA) was prepared by photodeposition, and its nonlinear optical properties were investigated. The results demonstrate that the modulation depth and saturation intensity of MoS2-Co3S4 SA are 24 % and 4.53 MW/cm2, respectively. The fiber laser based on MoS2-Co3S4 SA could realize the fundamental frequency mode-locked at 23.11 MHz with a pulse width of 0.99 ps. In addition, various high-order HML are realized with this laser system capable of stable operation for extended periods up to the highest repetition frequency of 1.109 GHz achieved thus far in this field. This research provides strong support to promote the development and commercialization of HRF fiber lasers.