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Research And Suggestions On Top-Down Design Methodology Of High-End Cnc Machine Tools, Weiguo Gao, Dawei Zhang, Bingye Liu

Bulletin of Chinese Academy of Sciences (Chinese Version)

The strategic significance of top-down design theory, method and technical system of high-end CNC machine tools is expounded, so as to realize the independent research and development of high-end CNC machine tools, satisfy the requirements of high-end users in key fields and maintain the independence and control of the core technologies. The top-down design methods and some key scientific problems are proposed, including static-dynamic stiffness design, geometric accuracy design, thermal balance design, and assembly process accuracy design, based on the spatial position and attitude error, relative dynamic flexibility of the working space, through the design, processing and assembly process. The …

Development Of China’S Ultra-Precision Equipment Industry And Support Of Patient Capital, Hong Jiang

Bulletin of Chinese Academy of Sciences (Chinese Version)

As a core field of high-end manufacturing, China’s ultra-precision equipment industry has achieved rapid development driven by policy support and technological advancements. Nevertheless, it still faces challenges such as technological bottlenecks, international competition, and funding shortages. Its characteristics—long R&D cycles, high risks, and substantial capital investments—are misaligned with the risk-averse nature of traditional financial systems, urgently requiring the support of “patient capital”. Although China possesses a vast pool of long-term capital (e.g., social security funds and insurance funds), systemic gaps prevent these funds from being effectively transformed into patient capital that supports frontier technologies. This study argues that developing patient …

Breakthrough Path Of High-End Equipment Manufacturing Driven By Independent Innovation—From Perspective Of R&D And Industrialization Of High-End Wafer Stage Of Lithography Machine, Yu Zhu

Bulletin of Chinese Academy of Sciences (Chinese Version)

Focusing on R&D and industrialization of wafer stage of high-end lithography machine, this study deeply analyzes the development status and core challenges of China’s high-end equipment manufacturing industry. The study finds that although China’s high-end equipment manufacturing industry has achieved scale expansion and technological innovation, there are still deficiencies in the independent control of core technologies, facing the dual bottlenecks of technological innovation and basic capabilities. By analyzing the independent innovation practices of wafer stage, including aspects such as core technology breakthroughs, basic capacity enhancements, industrial chain collaboration, and the construction of industry-university-research support systems, the internal laws for the …

Challenges And Opportunities For Semiconductor Equipment Facing 15th Five-Year Plan, Tianchun Ye, Yu Zhu, Guoming Zhang, Xiaoli Du, Zhenlin Lei, Pengpeng Yuan

Bulletin of Chinese Academy of Sciences (Chinese Version)

During the “15th Five-Year Plan”, China’s semiconductor equipment industry is facing the dual challenges of technological blockade and supply chain decoupling. It needs to shift from “catching up and replacing” to “path innovation” to break through its dependence on the international technology system. This study analyzes three core needs: supporting self-reliance (breaking through the bottleneck of advanced process equipment and parts), building an innovation ecosystem with Chinese characteristics (exploring new technology paths such as GAA and 3D integration), and promoting intelligent upgrading (integrating AI and digital technology). At the same time, it proposes to use the strategy of “re-globalization” to …

Generative Ai-Driven Paradigm Shift For Future Industrial Innovation, Lan Xue, Lidan Jiang

Bulletin of Chinese Academy of Sciences (Chinese Version)

Generative AI, as the core engine triggering a paradigm shift in future industrial innovation, is propelling the next generation of artificial intelligence toward a “new qualitative state” characterized by deep thinking and long-chain reasoning. This study, grounded in the emerging attributes of generative AI-driven future industrial innovation, examines the mutually constitutive relationship between generative AI and industrial innovation in the digit-intelligence era. Through three analytical dimensions, namely, AI-driven transformation of knowledge production paradigms, the reconstruction of technological agency spaces, and the unleashing of new qualitative factor values, it thoroughly deciphers the paradigm evolution driven by generative AI. Furthermore, it proposes …

Current Status And Development Trends Of Domestic High-End Equipment In Aero-Engine Manufacturing, Hu Chen, Shilin Jiang, Hongtao Tang, Mingshan Song, Haowei He

Bulletin of Chinese Academy of Sciences (Chinese Version)

Aero-engines are known as the “pearl on the crown of industry”. As global manufacturing competition intensifies, achieving independent control of high-end equipment in aero-engine manufacturing is crucial for China to become a global aviation power. This paper reviews the development, achievements, challenges, and future directions of domestic five-axis machine tools, planers, 3D printing equipment, and micro-hole processing equipment in this field. Domestic five-axis machine tools have made progress through structural innovation and process optimization, gradually replacing imports. Planers have advanced in intelligence and precision, 3D printing equipment in multi-axis coordination and material diversity, and micro-hole processing equipment in compound processes …

Present Situation, Problems And Suggestions Of Advanced Optical Ultra-Precision Manufacturing Technology, Xin Zhang, Kuo Hai, Zizheng Li, Yinghuai Zhang, Binzhi Zhang, Yunfei Zhang, Zhongming Zang, Peng Zeng, Mingtao Wu, Kailong Li, Lisong Yan, Taixi Cehn, Yigang Qian, Hongfei Jiao

Bulletin of Chinese Academy of Sciences (Chinese Version)

With the continuous development of key fields such as laser nuclear fusion, space-to-earth observation, deep space exploration, and extreme ultraviolet lithography, the demand for optical components with high surface shape accuracy and high surface quality is increasing. Advanced optical ultra-precision manufacturing technology has become the core pillar of the national high-end manufacturing field. In this paper, the research status of advanced optical ultra-precision manufacturing technology in China is described with the focus on material preparation technology of optical components, ultra-precision forming, polishing, testing and surface treatment technology of components. The existing problems and countermeasures in this field in China are …

Promoting Construction Of China’S Modern Industrial System By “ Multi-Tracking” Research And Innovation Model, Yongnian Zheng, Lanmeng Xu

Bulletin of Chinese Academy of Sciences (Chinese Version)

The core of the competition between large nations during the fourth industrial revolution is centered on economic resilience, which is based on the industrial system of each nation. The key takeaway from the historical experience of industrial development in the United Kingdom and the United States is that the building of a modern industrial system must prioritize the balanced development of industries rather than concentrating solely on the financial and service sectors and ignoring the manufacturing sector, which leads to industrial hollowing-out. China ought to build a modern industrial system that possesses the five characteristics, including industry comprehensiveness, large capacity, …

Policy Practices And Countermeasures Analysis On Deep Integration Of Technological Innovation And Industrial Innovation, Defang He, Tao Chen, Hui Liu, Fangjuan Yang

Bulletin of Chinese Academy of Sciences (Chinese Version)

Technological innovation serves as the strategic foundation for driving high-quality development and building a modern industrial system. To compete for global leadership in science, technology, and industrial advancement, major economies worldwide are reshaping their policy frameworks to accelerate the development of cutting-edge technologies and future industries. This study analyzes the intrinsic mechanisms and policy evolution of the integration between technological innovation and industrial innovation. By examining domestic and international case studies—such as integrated circuits, mRNA vaccines, new energy vehicles, and photovoltaics—it reveals how strategic guidance and policy coordination facilitate the convergence of innovation chains and industrial chains. Furthermore, the study …

Study On Management And Mechanism Of National Research Institutions To Organize Critical And Core Technologies R&D Activities, Xiaoxi Xiao, Xiang Shen

Bulletin of Chinese Academy of Sciences (Chinese Version)

As an important component of the national strategic scientific and technological forces, national research institutions, especially those in high-tech fields, have important missions and responsibilities in developing critical and core technologies. This study firstly analyzes the mission and function of national research institutions in critical and core technology research, and then illustrates that national research institutions are capable of undertaking critical and core technologies that need large and long cycle of investments and are of high risk, which means universities and enterprises could not or have no willingness to carry out. In details, national research institutions are able to conduct …

Case Study And Enlightenment Of Key And Core Technology Research, Yanni Han

Bulletin of Chinese Academy of Sciences (Chinese Version)

Since the reform and opening up, China has made significant progress in economic and technological development. Nevertheless, the complex international situation has made us aware that there are still some visible and invisible key core technologies under the control of others, bring us into a passive situation in international competition. Technological advantages are increasingly being applied in political confrontations between nations, serving as important means of sanctions and invisible weapons. Being dependent on others for key and core technologies has become a hidden danger to China’s economic and social development. Based on case studies of some successful key and core …

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Bulletin of Chinese Academy of Sciences (Chinese Version)

No abstract provided.

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Bulletin of Chinese Academy of Sciences (Chinese Version)

No abstract provided.

Does Higher Socioeconomic Status Associate With Better Mental Health Outcomes Among Primary Caregivers In Rural China?, Wenwen Zhang

Master's Theses

This study explores the intricate relationship between socioeconomic status (SES) and the mental health outcomes of primary caregivers in rural China, focusing on the Early Childhood Development (ECD) context in Ya'an. Anchored in a major intervention project launched in 2023, the study critically examines the hypothesis that higher socioeconomic status correlates with lower levels of negative emotions among caregivers.

Utilizing cross-sectional data, the research investigates how educational attainment and household income influence caregivers' mental health, measured through the DASS-21 score in three dimensions: stress, anxiety, and depression. The findings reveal that higher household income and educational levels are significantly associated …

Dose Higher Socioeconomic Status Associate With Better Mental Health Outcomes Among Primary Caregivers In Rural China?, Wenwen Zhang

Master's Theses

This study explores the intricate relationship between socioeconomic status (SES) and the mental health outcomes of primary caregivers in rural China, focusing on the Early Childhood Development (ECD) context in Ya'an. Anchored in a major intervention project launched in 2023, the study critically examines the hypothesis that higher socioeconomic status correlates with lower levels of negative emotions among caregivers.

Utilizing cross-sectional data, the research investigates how educational attainment and household income influence caregivers' mental health, measured through the DASS-21 score in three dimensions: stress, anxiety, and depression. The findings reveal that higher household income and educational levels are significantly associated …

Using An Interrupted Case Study To Engage Undergraduates’ Critical Thinking Style And Enhance Content Knowledge, Kelsey Hall, Katherine Starzec

Journal on Empowering Teaching Excellence

Access the online Pressbooks version of this article here.

The interrupted case study is a structured way to engage students in active learning. Interruptions, or pauses for reflection and discussion scheduled within the case-study presentation, provide students with a chance to collaborate and engage in critical thinking. Critical thinking style, which is a measure of how one tends to think critically, provides insight into how one tackles problem solving. This article describes a pilot project that combined critical-thinking style and an interrupted case study, delivered over a two-class-period time frame, to four college courses. The project’s goals were to assess …

Determining The Impact Of Mindfulness Activities To Increase Joy In Work And Decrease Burnout: An Integrative Review, Kimberly Gleason Bogart

Doctoral Dissertations and Projects

This integrative review aims to evaluate whether mindfulness effectively increases joy in work and decreases nursing burnout. A lack of joy leads to feelings of burnout and negatively affects nurses and their desire to leave the profession. Nursing is often accompanied by intense emotional and physical demands that can lead to job dissatisfaction, anxiety, and stress. Burnout diminishes the quality of care and negatively impacts nurses’ well-being. This integrative review aims to explore mindfulness interventions to increase joy within nursing and potentially alleviate burnout. Drawing upon existing literature, this paper examines various mindfulness interventions and factors contributing to burnout among …

A Nearly Gapless, Highly Contiguous Reference Genome For A Doubled Haploid Line Of Populus Ussuriensis, Enabling Advanced Genomic Studies, Wenxuan Liu, Caixia Liu, Song Chen, Meng Wang, Xinyu Wang, Hairong Wei, Et Al.

Michigan Tech Publications

Populus species, particularly P. trichocarpa, have long served as model trees for genomics research, owing to fully sequenced genomes. However, the high heterozygosity, and the presence of repetitive regions, including centromeres and ribosomal RNA gene clusters, have left 59 unresolved gaps, accounting for approximately 3.32% of the P. trichocarpa genome. In this study, the callus induction method was improved to derive a doubled haploid (DH) callus line from P. ussuriensis anthers. Leveraging long-read sequencing, we successfully assembled a nearly gap-free, telomere-to-telomere (T2T) P. ussuriensis genome spanning 412.13 Mb. This genome assembly contains only seven gaps and has a contig …

Curing Bodies With Bodies: Renyao (Human-Derived Drugs) In Late Imperial China, Erqi Cheng

Dissertations - ALL

This dissertation explores the philosophical and socioeconomic context of late imperial Chinese pharmacology and medical therapies from the sixteenth to the eighteenth centuries. It examines the rise of human-derived drugs (renyao) in the sixteenth century and their subsequent decline in the late seventeenth and eighteenth centuries, influenced by a complex interplay of changes in social mores, urban tastes, commercial publishing, and philosophical ideologies. By drawing from a diverse range of sources including bencao (materia medica) works, formularies, Daoist texts, government documents, biji (belles lettres), novels, collected verses, and local gazetteers, the dissertation argues that Chinese medical culture in the Ming …

Predicting Personal Growth: An Analysis Of Self-Relevant Approaches, Cole Morse

Honors Theses

Identifying predictors of personal growth–defined as striving to fulfill one’s unique potential–may be important for achieving a life of flourishing (Ryff & Singer, 2008). While existing research demonstrates the link between self-esteem and personal growth, gaps remain in our knowledge of the relationship between other potential self-referential predictors and personal growth (Paradise & Kernis, 2002). The intention of the current study is to not only conceptually replicate the link between positive self-regard (i.e., a positive self-evaluation that is theoretically akin to self-esteem) and personal growth, but to also investigate whether different ways of relating to the self offer unique pathways …

Strict Conservation Yet Non-Essential Nature Of Plasmid Gene Bba40 In The Lyme Disease Spirochete Borrelia Burgdorferi, Yuqi Zhu, Yili Zhang, Hui Chen, Lisha Zhang, Chensi Shen

Faculty, Staff and Student Publications

The increasing concern over climate change has spurred significant interest in exploring the potential of microalgae for wastewater treatment. Among the various types of industrial wastewaters, high-salinity NH₄⁺-N wastewater stands out as a common challenge. Investigating microalgae’s resilience to NH₄⁺-N under high-salinity conditions and their efficacy in NH₄⁺-N utilization is crucial for advancing industrial wastewater microalgae treatment technologies. This study evaluated the effectiveness of employing nitrogen-efficient microalgae, specifically Oocystis lacustris, for NH₄⁺-N removal from saline wastewater. The results revealed Oocystis lacustris’s tolerance to a Na_{2 …}

Mechanical Performance Of Uhpc Building Envelope Based On Topological Optimization And Modular Composition, Zhou Zhixuan, Jiang Youbao, Liu Jun, Xiang Yi, Zhou Hao

Journal of China & Foreign Highway

To ensure a safe，aesthetic，and lightweight building envelope，an ultra-high performance concrete （UHPC） building envelope and its node connection mode were proposed based on topological optimization and modular composition.Firstly，the UHPC building envelope was optimized by using the method of minimizing structural compliance subjected to given material volume constraints，and the mechanical performance before and after optimization was compared.The modular design was adopted，and the optimization result of the most unfavorable stress area in the model was taken as the basic configuration unit.Then，UHPC tenon and mortise nodes were proposed，which could be simply assembled into modules.By considering the weak mechanical performance of nodes，the finite element analysis …

Glacier Lake Inventory And Lake Outburst Flood Hazard Assessment In Kanchenjunga Conservation Area, Nepal, Prabish Khadka Chhetri

Theses

This study presents a comprehensive assessment of glacial lakes and land surface temperature (LST) dynamics within the Kanchenjunga Conservation Area (KCA) from 2010 to 2023. The KCA holds significant ecological importance, serving as a critical habitat for diverse flora and fauna, while also playing a vital role in regional hydrological systems. Additionally, its stunning landscapes attract tourists and mountaineers from around the world, further emphasizing the need for understanding environmental changes within the area. Utilizing medium to high-resolution satellite imagery from PlanetScope for glacial mapping and Landsat for LST analysis, the research aimed to achieve two primary objectives: creating an …

A Contextual Analysis Of Life Stories From Older Adults Participating In A Telephone Reminiscence Program, Eliana Likorama

Honors Scholar Theses

Life satisfaction, loneliness, and mental health & well-being are important factors to consider when working with the older adult population. This population is predisposed to many risk factors for mental health problems such as coping with a serious illness, losing a loved one, living alone, cognitive deficits, and more. Reminiscence is one simple, flexible, and cost-effective intervention that can be utilized to promote the mental health and well-being of older adults. Reminiscence is defined as the cognitive process of recalling the past. Numerous studies have shown beneficial effects of reminiscence in older adults: increased self-esteem, enhanced quality of life, increased …

Neutrosophic Sets And Systems, Vol. 67,2024, Florentin Smarandache, Mohamed Abdel-Basset, Said Broumi

Neutrosophic Sets and Systems

the book of the whole volume

Governance And Islam In East Africa: Muslims And The State In Kenya And Tanzania, Farouk Topan, Kai Kresse, Erin E. Stiles, Hassan Mwakimako

Exploring Muslim Contexts

Explores the relationship between Muslim communities and the State in East Africa in political, institutional and legal contexts

• Focuses on the relationship between Muslims and the State in Kenya and Tanzania
• Asks which factors, both within and outside the Muslim community, shape and affect this relationship in contemporary times
• Presents 13 case studies exploring governance issues within and across the categories of politics, institutions and law in Kenya and Tanzania
• Identifies cross-cutting issues of governance and Muslim communities which are relevant beyond East Africa

Recent studies of Muslims in Kenya and Tanzania have tended either to examine governance of Muslims …

Believe In Yourself And Keep The Doctor Away: Health Self-Efficacy Mediates The Relationship Between Retrospectively Reported Adverse Childhood Experiences (Aces) And College Students’ Current Self-Reported Physical Health, Amber Sale

Psychological Science Undergraduate Honors Theses

Adverse childhood experiences (ACEs) are potentially traumatic events occurring during the first 18 years of life (CDC, 2022) and are strong predictors of later negative outcomes such as poor physical health, risky health behaviors, and poor lifestyle habits (Felitti et al., 1998; Lovis-Schmidt et al., 2022; Windle et al., 2018). Previous literature has suggested that self-efficacy may explain the negative impact ACEs have on later physical health (Sachs-Ericsson et al., 2011). Therefore, the present study examined the relationship between college students’ retrospectively reported ACEs and current self-reported physical health, in the context of health self-efficacy levels (i.e., self-perceptions of one’s …

Emergence: Social Movements, Law Enforcement, And Defending The Sanctity Of Life, Diana Elizabeth Aroche

Doctoral Dissertations

This study examines the aftermath of national social movements advocating for police reforms and accountability, with San Francisco emerging as a pivotal city at the forefront of criminal justice and policing transformations. Rebuilding community trust and implementing substantive police reforms aimed at preserving lives has proven to be a formidable challenge. The convergence of interests among all stakeholders, driven by a shared commitment to dismantling institutional racism and implementing reforms that fostered trust with communities of color and law enforcement, played a pivotal role.

A significant aspect of this reform process has been the development of social movement convergence, where …

Exploring Affective Experiences Of Queer Individuals Navigating Relationships With Evangelical Parents, Grace Pappas

School of Social Work Faculty Publications and Presentations

An abundance of scholarship explores and discusses the process of queer identity development, including the experience of disclosing one’s queer identity, often referred to as coming out. Coming out to one’s parent(s) can be a challenging and complex experience for queer individuals, particularly for children from religious families. In this study, I explored the nuanced relationships between queer individuals and their Evangelical parents. I conducted qualitative interviews with nine participants. Using thematic analysis and Ahmed’s theory of affect and happy objects, I constructed four themes: (a) learning the affect queer carries, (b) feeling the affects of being queer, (c) how …

U.S Presidents In Africa After The Cold War: In Search Of A Reason, Socrates Mbamalu

War, Diplomacy, and Society (MA) Theses

Africa has often ranked low in priority when it comes to U.S. foreign relations. Often, the presence of a threat to U.S. interests in Africa sparks a redirection of U.S. leaders to Africa. The Cold War was one of such periods. This work looks at U.S. leaders after the Cold War, focusing on George W. Bush, whose policies in Africa are considered the most impactful and resource consuming. Scholars have, however, failed to put Bush’s approach to Africa in a broader historical perspective. Existing literature has analyzed Bush’s policies in Africa using programs such as the Millenium Challenge Account (MCA), …