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Design and experimental study of a passive power-source-free stiffness-self-adjustable mechanism

Yuwang LIU, Dongqi WANG, Shangkui YANG, Jinguo LIU, Guangbo HAO

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 1, Pages 32-45 doi: 10.1007/s11465-020-0604-4

Abstract: Passive variable stiffness joints have unique advantages over active variable stiffness joints and areWe propose a new passive power-source-free stiffness-self-adjustable mechanism that can be used as theself-adaptive adjustment of stiffness in a purely mechanical manner.The variable stiffness mechanism can automatically adjust joint stiffness in accordance with the magnitudeThe variable stiffness principle is explained, and the design of the variable stiffness mechanism is

Keywords： variable stiffness mechanism stiffness self-regulation bionic robot modeling

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Self-generation of machining precision and its realization in lapping of super precision solid balls

ZHANG Bopeng

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 3, Pages 348-353 doi: 10.1007/s11465-008-0065-7

Abstract: A self-generation system is a kind of system with self-organization capability.self-regulation capability, 2 with the self-determination capability of goals, and 3 with the self-organizationof self-removal of errors is presented.Self-generation includes the ability of self-removal of errors for solid balls, convergence of self-removalof errors, self-generation of precision, and self-generating system for the given.

Keywords： self-generation necessary self-regulation capability viewpoint Necessary

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Climate change and its consequences for water and wastewater management

Peter A. WILDERER

Frontiers of Environmental Science & Engineering 2009, Volume 3, Issue 1, Pages 1-1 doi: 10.1007/s11783-009-0001-z

Abstract: Life, in combination with solar radiation and abiotic processes, is most probably the reason why liquid water has existed on Earth for over billions of years, and the global mean temperature has remained in a life-enabling range. Efforts to limit or even reverse global warming must be derived from the knowledge of the Earth’s complex life-support system. In this context, the balance between liquid and gaseous water plays a crucial role, and water management becomes an important field of innovation and action, globally, on the scale of watersheds but also on the very local level. Cascading use, reuse, and temporary storage of water in urban settings must be considered to limit over-extraction of water from natural resources, and to maintain the life supporting function of ecosystems. At the same time, public health requirements, cost efficiency, and reliability demands are to be met.

Keywords： ecosystem management tools self-regulation urbanization water-climate relationship water reuse

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Radial electromagnetic type unbalance vibration self-recovery regulation system for high-end grinding

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 3, doi: 10.1007/s11465-023-0763-1

Abstract: The unbalance vibration self-recovery regulation (UVSRR) system is proposed to suppress the vibrationResults show that the self-locking torque satisfies the actual demand, and the driving torque is increased

Keywords： UVSRR system radial electromagnetic type vibration suppression performance simulation engineering application

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Research on the Fault Self-recovery Principle of Equipment System

Gao Jinji

Strategic Study of CAE 2005, Volume 7, Issue 5, Pages 43-48

Abstract: Under the guidance of the systemics theory，borrowing the idea of “self-recuperation” therapeuticof immunity, protection, compensation, regeneration, adaptation, etc., with the fault prevention and self-healingas the goal, this paper focuses on the study of the fault self-recovery principle and its engineeringFault Self-recovery Engineering (FSE), which can provide theoretical basis in developing a new generationof self-healing machine.

Keywords： equipment system principle of fault self-recovery fault self-recovery regulation diagnosis active control

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Biophysical Regulation of Cell Behavior—Cross Talk between Substrate Stiffness and Nanotopography Review

Yong Yang, Kai Wang, Xiaosong Gu, Kam W. Leong

Engineering 2017, Volume 3, Issue 1, Pages 36-54 doi: 10.1016/J.ENG.2017.01.014

Abstract:

The stiffness and nanotopographical characteristics of the extracellular matrix (ECM) influence numerous; however, the interwoven effects of stiffness and nanotopographical cues on cell behavior have not beenHerein, we first review the effects of substrate stiffness and nanotopography on cell behavior, and thenAttempts are made to connect extracellular regulation of cell behavior with the biophysical cues.We then discuss the challenges in dissecting the biophysical regulation of cell behavior and in translating

Keywords： Extracellular matrix Stiffness Nanotopography Adhesive ligands Cell behavior

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Mechanical design and analysis of a novel variable stiffness actuator with symmetrical pivot adjustment

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 4, Pages 711-725 doi: 10.1007/s11465-021-0647-1

Abstract: Thus, this paper aims to design a novel variable stiffness actuator (VSA) that can provide safer physicalVSA follows the idea of modular design, mainly including a variable stiffness module and a drive moduleAs the key component of the variable stiffness module, a stiffness adjustment mechanism with a symmetricalExperiment results show that the VSA stiffness is close to the theoretical design stiffness.regulation and a good performance for position tracking.

Keywords： variable stiffness actuator variable stiffness module drive module symmetrical structure double-deck

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SALL4 maintains self-renewal of porcine pluripotent stem cells through downregulation of OTX2

Ning WANG, Sile WANG, Yaxian WANG, Yuanxing CAI, Fan YANG, Huayan WANG

Frontiers of Agricultural Science and Engineering 2019, Volume 6, Issue 1, Pages 81-92 doi: 10.15302/J-FASE-2017180

Abstract: expression of SALL4A was not affected, indicating that SALL4B may be essential for the maintenance of piPSCs self-renewalfeedback regulatory mechanism may exist between SALL4 and OTX2, which is useful for the maintenance of the self-renewal

Keywords： OTX2 pluripotency pig SALL4 transcription regulation

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Comparison of indices for stiffness performance evaluation

Giuseppe CARBONE, Marco CECCARELLI,

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 3, Pages 270-278 doi: 10.1007/s11465-010-0023-z

Abstract: This paper addresses the problem of a numerical evaluation of the stiffness performance for multibodyStiffness indices are computed and compared for a case study.Results are used for comparing the effectiveness of the stiffness indices.

Keywords： robotics stiffness performance indices

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Moving policy and regulation forward for single-use plastic alternatives

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 3, doi: 10.1007/s11783-021-1423-5

Abstract: Single-use plastics are often used once or cannot be reused for extended periods. They are widely consumed with the rapid development of social economy. The waste generated by single-use plastics threatens ecosystem health by entering the environment and ultimately restricts sustainable human development. The innovation of sustainable and environmentally friendly single-use plastic alternative materials and the joint participation of governments, enterprises and the public are promising technologies and management approaches that can solve the problem of single-use plastics wastes. The development of single-use plastic alternative products can be promoted fundamentally only by improving relevant legislation and standards, providing differentiated industrial policies, encouraging scientific and technological innovation and expanding public participation.

Keywords： Single-use plastic alternatives Policy Regulation Sustainable development

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Definition and Verification of Shape Meter Method

Zhang Jinzhi,Duan Chunhua,Zhu Jianqin

Strategic Study of CAE 2001, Volume 3, Issue 12, Pages 47-51

Abstract:

Shape survey and control mathematics model,analytical theory for shape stiffness and the shape andand practicality of the shape meter method ： one is to roll aluminum plate and calculate the shape stiffnessof mill and rolled piece, then survey aluminum plate crown to verify shape stiffness e-quation;the othersurvey data off-line of hot continuous roll,and verify the shape survey and control mathematics model by self-adaptation

Keywords： shape meter methcxl shape stiffness equation survey and control mathematics model follow-up calculation self-adaptation

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Phase transition regulation and caloric effect

Frontiers in Energy 2023, Volume 17, Issue 4, Pages 463-477 doi: 10.1007/s11708-023-0860-1

Abstract: Solid state refrigeration based on caloric effect is regarded as a potential candidate for replacing vapor-compression refrigeration. Numerous methods have been proposed to optimize the refrigeration properties of caloric materials, of which single field tuning as a relatively simple way has been systemically studied. However, single field tuning with few tunable parameters usually obtains an excellent performance in one specific aspect at the cost of worsening the performance in other aspects, like attaining a large caloric effect with narrowing the transition temperature range and introducing hysteresis. Because of the shortcomings of the caloric effect driven by a single field, multifield tuning on multicaloric materials that have a coupling between different ferro-orders came into view. This review mainly focuses on recent studies that apply this method to improve the cooling performance of materials, consisting of enlarging caloric effects, reducing hysteresis losses, adjusting transition temperatures, and widening transition temperature spans, which indicate that further progress can be made in the application of this method. Furthermore, research on the sign of lattice and spin contributions to the magnetocaloric effect found new phonon evolution mechanisms, calling for more attention on multicaloric effects. Other progress including improving cyclability of FeRh alloys by introducing second phases and realizing a large reversible barocaloric effect by hybridizing carbon chains and inorganic groups is described in brief.

Keywords： phase transition regulation caloric effect solid state refrigeration

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New nonlinear stiffness actuator with predefined torque‒deflection profile

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 1, doi: 10.1007/s11465-022-0721-3

Abstract: A nonlinear stiffness actuator (NSA) could achieve high torque/force resolution in low stiffness rangeand high bandwidth in high stiffness range, both of which are beneficial for physical interaction between

Keywords： compliant actuator nonlinear stiffness actuator nonlinear spring predefined torque−deflection profile

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The function and regulation of OTU deubiquitinases

Jiansen Du, Lin Fu, Yingli Sui, Lingqiang Zhang

Frontiers of Medicine 2020, Volume 14, Issue 5, Pages 542-563 doi: 10.1007/s11684-019-0734-4

Abstract: character, structure and function of OTUs, such as the substrate specificity and catalytic activity regulation

Keywords： ubiquitin OTU deubiquitinases structure function regulation

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Mechanical design, modeling, and identification for a novel antagonistic variable stiffness dexterous

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 3, doi: 10.1007/s11465-022-0691-5

Abstract: It achieves finger stiffness adjustability according to the biologically inspired stiffness variationprinciple of discarding some mobilities to adjust stiffness.The mechanical design of the finger and its stiffness adjusting methods are elaborated.The stiffness characteristics of the finger joint and the actuation unit are analyzed.finger stiffness presets are provided to verify the validity of the model.

Keywords： multifingered hand mechanism design robot safety variable stiffness actuator