Ideas Spread Inc. (E-Journals)
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Effect of Ti2AlC/Al Binder Content on the Mechanical Properties of Sintered PcBN
Get PDFIn this study, Polycrystalline cubic boron nitride (PcBN) composites were successfully synthesized via high-pressure and high-temperature (HPHT) sintering at 5.5 GPa and 1500 °C, using cBN and a Ti₂AlC/Al mixture as the raw material system. The effects of binder content and Ti₂AlC/Al ratio on the phase composition, microstructure, and mechanical properties of PcBN were systematically investigated. The primary reaction products were identified as TiC, TiB₂, and AlN. With increasing total binder content, the relative density, Vickers hardness, and fracture toughness of the PcBN composites initially increased and subsequently decreased. The composite with a cBN content of 80 wt.% exhibited an optimal combination of properties, achieving a relative density of 99.3%, a microhardness of 43.49 GPa, and a fracture toughness of 7.65 MPa·m1/2. Furthermore, at a constant Ti₂AlC content, an increase in Al content promoted the formation of TiB₂
Robust Trajectory Tracking Control for Quadrotor UAVs with Prescribed Performance Constraints
Get PDFAchieving high-precision trajectory tracking for quadrotor unmanned aerial vehicles (UAVs) is frequently impeded by complex operating environments involving aerodynamic disturbances, parameter uncertainties, and potential actuator performance degradation. To guarantee flight safety and tracking accuracy under these adversarial conditions, this paper presents a robust control strategy that integrates a prescribed performance mechanism with sliding mode control. First, to decouple the tracking precision from system uncertainties, a prescribed performance envelope is constructed. By transforming the tracking error dynamics, this mechanism ensures that the positional and attitudinal deviations are strictly confined within a predefined decaying funnel, guaranteeing convergence irrespective of the initial error magnitude. Second, a robust nonsingular fast terminal sliding mode controller is synthesized based on the transformed dynamics. Unlike complex composite methods that rely on explicit fault estimation units, this controller utilizes a robust reaching law to directly suppress the lumped uncertainties and stabilize the system in finite time. Numerical simulations confirm that the proposed scheme effectively restricts tracking errors within the user-defined boundaries even in the presence of simultaneous actuator faults and external disturbances, demonstrating superior robustness and transient performance
The Impact of Wildfires on California Agriculture
Get PDFThis paper examines the complex impacts of wildfires on agriculture in California, analyzing the consequences across the environment, society, and economy both during and after the events. Given the agricultural sector's high importance and hefty contributions to a region's well-being, it is among the most severely affected areas. Understanding these in-depth effects, particularly on the environment and agriculture, is essential for grasping the broader implications for the economy and society. This paper analyzes past wildfires and investigates fire mitigation methods. Additionally, graphical analyses illustrate trends in wildfire damage over the past century, along with corresponding increases in pollutants. Furthermore, graphs are utilized to visualize the scope of damage by showing wildfire damage of the past century and the increase in pollutants in water. Ultimately, the data supports the crucial need to implement policy changes that prioritize wildfire preparation, response strategies, and long-term resilience
Adjustment and Integration of International and Domestic Rules on Compensation for Damage to Checked Luggage of Air Passengers—Focusing on the Montreal Convention and China's Civil Aviation Law
Get PDFIn 2024, the Montreal Convention raised the compensation limit for checked luggage to 1,519 Special Drawing Rights (SDRs). This revision further highlights the lag and shortcomings of China's Civil Aviation Law and its supporting regulations in aligning with international conventions. To address the challenges of integrating international and domestic rules on compensation for damage to checked luggage, this study conducts a comparative analysis of the core provisions of the Montreal Convention and China's Civil Aviation Law, supplemented by an empirical analysis of the case Lou Mengjie v. Aeroflot Russian Airlines. The research identifies key differences between the two frameworks in terms of compensation limits and scope of application, while also revealing practical integration difficulties, such as the chaotic application of mixed transportation rules, the disconnect between the domestic compensation limit of 100 yuan per kilogram and actual losses, and deviations in the judicial application of the convention. Grounded in the theory of transformative domestication, the study proposes a three-dimensional optimization approach: unifying core convention systems through legislation, standardizing the application of laws in judicial practice, and establishing a dynamic regulatory mechanism through administrative measures. This provides actionable solutions for aligning China's aviation laws with international rules, ultimately achieving the dual goals of protecting passenger rights and promoting the sustainable development of the aviation industry
The Pastor as Romantic Author: AI, Preaching, and the Unacknowledged Inheritance of Authenticity
Get PDFThis article interrogates contemporary reactions to sermons produced with generative technologies through a historical–conceptual lens, arguing that widespread judgments of such outputs as “soulless,” “generic,” or lacking a “beating heart” are best explained by an unacknowledged inheritance from nineteenth-century Romantic expressivism. Rather than treating resistance to machine authorship as a theological verdict on computational incapacity, the study reconstructs how Romanticism centered authorship in sincere self-expression and solitary genius, displacing earlier heraldic expectations that prized fidelity to a received message. Methodologically, the analysis combines intellectual history with discourse analysis of global Christian experiments in synthetic composition (2020–2025), denominational guidance, and media commentary to map evaluative language about empathy, presence, and struggle. Findings show that signature critiques—insistence on lived experience, emotive immediacy, and visible spiritual labor—track Romantic values, whereas premodern postils, lectionaries, and printed collections reflect a utilitarian, office-anchored model of mediated authorship. Reframing the debate through this genealogy clarifies which objections are theological and which are cultural, enabling more precise judgments about the admissible roles of computational tools. The article proposes a two-axis matrix contrasting expressive-authorship criteria (voice, pathos, autobiographical index) with heraldic-fidelity criteria (doctrinal conformity, tradition-consistent rhetoric, communal authorization), and specifies use-cases where automated systems serve as instruments under pastoral oversight rather than as independent authors. Contributions include: (1) theorizing the “pastor as Romantic author”; (2) a typology of authenticity claims in homiletic criticism; and (3) policy-adjacent recommendations on disclosure, provenance, and sermonic labor. Recognizing Romantic inheritances allows churches to choose their authorship ideal consciously, evaluating generative media not by reflex but by clearly articulated theological priorities.
The Strategies and Significance of Constructing the Primary School "Chinese Language Map" Under the "Big Chinese" Perspective
Get PDFIn the context of a cultural tradition where literature, history, and philosophy are interconnected, and the interdisciplinary fusion of education, this study reflects on primary school Chinese language learning, especially ancient poetry, from the "Big Chinese" perspective. By using geography as a foundation, we aim to construct students' "Chinese Language Map," enhancing the effectiveness of language learning. The construction of the "Chinese Language Map" should emphasize both the present learning environment and the individuality of different students, while promoting an open landscape for the map, merging science with imagination. The significance of constructing the "Chinese Language Map" lies in its ability to enhance students' interest in learning, foster systematic thinking, and improve their understanding of life and literary sensitivity. For teachers, it offers an opportunity to update their teaching concepts and expand their knowledge horizons
Research on Guangcai Porcelain under the Fusion of Eastern and Western Art Contexts
Get PDFGuangcai porcelain was born during the Kangxi period of the Qing Dynasty, and its historical trajectory as an outstanding representative of Chinese export porcelain is closely intertwined with the expansion of globalized trade networks. In the 18th century, the “China Fever” in Europe gave rise to a fervent demand for Oriental porcelain, and Guangcai porcelain became an important carrier of material and cultural exchanges between the East and the West by virtue of the geographical advantage of the Guangzhou port. Its uniqueness lies in the fact that it not only retains the oriental heritage of traditional pastel and enamel craftsmanship, but also takes the initiative to absorb Western aesthetic needs, combining the complex curves of the Rococo style, the European aristocratic coat of arms and the traditional Chinese birds and flowers into one. This kind of cross-cultural creation is not a simple superimposition of patterns, but is based on the craftsman's in-depth understanding of foreign cultures and re-creation. In the early stages of globalization, Guangcai porcelain already demonstrated the pioneering nature of cross-cultural fusion, and its rise and fall mapped the subtle changes in power relations between the East and the West, and became a precious sample for the study of the interactions between art and commerce, and between the local and the global
Challenges and Pathways for the Aging Neighborhood Renovation from the Perspective of Participatory Governance: A Case Study of X Community in H Street, Yinchuan City
Get PDFThe renovation of aging neighborhoods faces challenges such as governance imbalance and insufficient resident participation, leading to low renovation efficiency. Based on the theory of participatory governance, this paper constructs an analytical framework of "power structure—participation mechanism—governance efficiency" to reveal the causes of dilemmas in the renovation cases of coal sheds and markets in X Community, H Street. The government-led "power structure imbalance" marginalizes residents' demands, the "breakdown of formalized participation mechanisms" exacerbates negotiation failures, and conflicts of diverse interests lead to the "dissipation of governance efficiency." To address these challenges, this study proposes a four-dimensional optimization strategy: adopting differentiated renovation strategies to balance safety concerns and resident needs, establishing a clear legal framework to clarify property rights, building institutionalized consultation platforms to strengthen residents’ decision-making power, and promoting community cultural integration to enhance collective recognition. By reconstructing the governance logic of "government-community-residents" co-governance, this study promotes the shift of residents from symbolic participation to substantive decision-making, providing a new paradigm for resolving conflicts of interest and implementation obstacles in aging neighborhood renovation, thereby contributing to the modernization of grassroots governance
Research on the Development of Chinese Painting Under the Influence of Western Art Thought in the 1980s
Get PDFThis paper aims to study the profound impact of Western art thought on the development of Chinese painting in the 1980s. By analyzing the emergence of Western modernism and postmodernism, the study explores how these artistic trends were introduced into China during the 1980s and significantly influenced the form, ideas, and content of Chinese painting. First, the paper reviews the main characteristics of Western art thought and analyzes the channels through which these ideas spread within the Chinese art community, as well as the awakening of artists’ self-awareness. Next, it focuses on discussing the innovations in painting form, the transformation of artistic themes, and the evolution of artistic ideas brought about by Western art, specifically elaborating on how artists integrated elements of Western expressionism, abstract art, and traditional Chinese painting into their creations. In addition, by analyzing the works of representative artists and important art events, the paper further reveals how Western art thought shaped the diverse development of Chinese painting in the 1980s. Finally, the paper concludes by summarizing the profound significance of these influences on the modernization, globalization, and theoretical innovation of Chinese art, providing a new perspective for future research
Cross-Attention Transformer-Based Visual-Language Fusion for Multimodal Image Analysis
Get PDFMultimodal image analysis is a significant research direction in the field of computer vision, playing a crucial role in tasks such as image captioning and visual question answering (VQA). However, existing visual-language fusion methods often struggle to capture the fine-grained interactions between visual and language modalities, leading to suboptimal fusion results. To address this issue, this paper proposes a visual-language fusion model based on the Cross-Attention Transformer, which constructs deep interactive relationships between visual and language modalities through cross-attention mechanisms, thereby achieving effective multimodal feature fusion. The proposed model first utilizes convolutional neural networks (CNN) and pre-trained language models (e.g., BERT) to extract visual and language features separately, and then applies cross-attention modules to capture mutual dependencies in feature sequences, resulting in a unified multimodal representation vector. Experimental results demonstrate that the proposed model significantly outperforms traditional methods in tasks such as image captioning and VQA, validating its superiority in multimodal image analysis. Additionally, visualization analysis and ablation experiments further explore the contribution of the cross-attention mechanism to model performance, while discussing the model's limitations and potential future improvements