Operation Mechanism Research Articles

The Impact of Financial Support Mechanisms and Geopolitical Factors on the Profitability of Investments in Solar Power Plants in Slovenia

This article examines the impact of financial support mechanisms and geopolitical factors on the profitability of investments in solar power plants within Slovenia. The European Union’s energy policy prioritizes increases in renewable energy sources, aiming to reduce dependency on unstable and volatile fossil fuel markets. Solar power plants play a vital role in this transition. The energy policy framework also includes mechanisms and support systems to operate such facilities. This article analyzes electricity price trends over the past decade and addresses which support type—guaranteed purchase or operational support—has proven more profitable for investments in solar power plants up to 50 kW in Slovenia, considering economic and geopolitical influences on the electricity market. Although the global energy market has been affected by various significant events in recent years, it was found that the COVID-19 pandemic had minimal impact on the electricity market. In contrast, the onset of the conflict in Ukraine has contributed to rising electricity prices and has influenced the support dynamics essential for the development and sustainability of renewable energy systems. Analyses from the past decade indicate a higher return on investment in solar power plants when operational support mechanisms are chosen over guaranteed purchase support.

Computational Investigation of the Operating Mechanism of the Ranque–Hilsch Vortex Tube

Abstract The Ranque–Hilsch vortex tube is a device that splits an incoming flow into two outgoing streams, but with the peculiar property that one stream exits at a lower total temperature than the incoming flow and the other at a higher total temperature. This temperature separation is accomplished without any moving parts, electronics or external power supplied to the device. Despite the passage of nearly a century since discovery of the effect, there remains a dearth of understanding regarding the mechanism responsible for the phenomenon. In fact, the literature contains competing theories with little evidence providing support. A promising technique to discern the responsible mechanisms for the energy transfer from the ultimately cold stream to the ultimately hot stream is to define a stream tube in a computational simulation of the flow that propagates upstream from the exits such that the stream tube interface separates the hot flow from the cold flow. In this article, we apply this method to a three-dimensional, full-volume analysis of the flow within a vortex tube using a computational simulation that was thoroughly validated against experiments on a physical replica of the computational geometry. In this novel study, the integral form of the energy equation was used to quantify all forms of the energy transfer within the vortex tube. The results demonstrate that the phenomenon of temperature separation is attributable primarily to viscous work in the radial direction due to the circumferential flow, with a lesser contribution from heat transfer in the radial direction.

Research on Integrated Management Path of Comorbidity Based on Grounded Theory.

This study seeks to thoroughly investigate the generation mechanism of the integrated management pathway for comorbidities, as well as its implementation and execution in practical settings. The findings aim to offer insights for the development of an integrated mechanism for comorbidity services. The collected raw data was coded and analyzed in depth by utilizing grounded theory as the research methodology, in conjunction with NVivo 14.0 software for qualitative analysis, and by adhering to domestic and international guidelines and consensus on comorbidity management. Following the three-level coding process, a total of 49 initial categories, 14 main categories, and 4 core categories (supply-type, demand-type, collaboration-type, and environment-type) were identified. Subsequently, a four-dimensional comprehensive comorbidities management pathway model, referred to as the "Derivative driving force-management pathway-main body network-operation mechanism," was developed. The model integrates the four paths of supply-type, demand-type, collaboration-type, and environment-type with the derived dynamics, subject network, and operation mechanism of comorbidities management. This not only enhances the comprehensiveness and continuity of comorbidities management but also establishes clear direction and evaluation indices for future empirical research.

Multifunctional Ultrathin Ti3C2Tx MXene@CuCo2O4 /PE Separator for Ultra-High-Energy-Density and Large-Capacity Lithium-Sulfur Pouch Cells.

The shuttling of lithium polysulfides (LiPSs), sluggish reaction kinetics, and uncontrolled lithium deposition/stripping remain the main challenges in lithium-sulfur batteries (LSBs), which are aggravated under practical working conditions, i.e., high sulfur loading and lean electrolyte in large-capacity pouch cells. This study introduces a Ti3C2Tx MXene@CuCo2O4 (MCC) composite on a polyethylene (PE) separator to construct an ultrathin MXene@CuCo2O4/PE (MCCP) film. The MCCP functional separator can deliver superior LiPSs adsorption/catalysis capabilities via the MCC composite and regulate the Li+ deposition through a conductive Ti3C2Tx MXene framework, enhancing redox kinetics and cycling lifetime. When paired with sulfur/carbon (S/C) cathode and lithium metal anode, the resultant 10 Ah-level pouch cell with the ultrathin MCCP separator achieves an energy density of 417Wh kg-1 based on the whole cell and a stable running of 100 cycles under practical operation conditions (cathode loading = 10.0 mg cm-2, negative/positive areal capacity ratio (N/P ratio) = 2, and electrolyte/sulfur weight ratio (E/S ratio) = 2.6 µL mg-1). Furthermore, through a systematic evaluation of the as-prepared Li-S pouch cell, the study unveils the operational and failure mechanisms of LSBs under practical conditions. The achievement of ultrahigh energy density in such a large-capacity lithium-sulfur pouch cell will accelerate the commercialization of LSBs.

Investigation of paeonol in dermatological diseases: an animal study review

Cortex Moutan is the root bark of the buttercup plant Paeonia suffruticosa Andr, of Ranunculaceae family. It has been utilized in Chinese medicine for thousands of years to treat a multitude of diseases, and traditional Chinese documents allege that it has heat-clearing, antipyretic, anti-inflammatory and detoxicating properties. Paeonol is a bioactive substance extracted from Cortex Moutan, which is considered to be one of its most effective metabolites. Recent studies have illustrated that paeonol treatment can alleviate skin damage, relieve the inflammatory response in patients with numerous dermatological conditions, and inhibit anomalous proliferation of skin tissue. Accordingly, paeonol may serve as a potential therapeutic agent for a variety of skin conditions. This review summarizes the physicochemical properties and pharmacokinetics (PK) characteristics of paeonol, and mechanisms of operation in diverse skin diseases, including dermatitis, psoriasis, pruritus, photoaging, hyperpigmentation, and hyperplasticscar. Additionally, much of the evidence is based on animal experiments. Furthermore, it explores the prospects of enhancing paeonol’s efficacy through extraction, synthesis, and formulation innovations, as well as strategies to overcome its limitations in dermatological therapy. This review aims to provide a more reliable theoretical basis for the clinical application of paeonol.

Novel power MOSFET with drain-side N–Si/N-SiGe heterojunctions for improving reverse recovery performance

—A novel power MOSFET structure with Drain-side N–Si/N-SiGe Heterojunctions (DH-MOS) is proposed by introducing a N SiGe region which is sandwiched between the N-drift region and N+ substrate on the drain side. The operation mechanism and simulation verification of DH-MOS are presented. Due to the difference in valence band of N Si/N SiGe heterojunction, holes can be more easily expelled from the N-drift region into N SiGe region during the reverse conduction of DH-MOS, resulting in a significant reduction in hole density inside the N-drift region, thus improving the reverse recovery performance. Simulation results show that the reverse recovery charge (Qrr) of DH-MOS is 2.08 μC/cm2, approximately 66.34 % lower than the 6.18 μC/cm2 of conventional MOS. The introduction of new DH-MOS structure with N–Si/N-SiGe heterojunctions does not result in a significant increase in reverse conduction voltage (VF). In addition, it does not sacrifice any forward conduction and blocking characteristics. The proposed DH-MOS introduces changes on the drain side, unlike existing methods which focus on the source side or drift region. And it can be compatible with existing improving measures to further improve the reverse recovery performance.

Adaptive Multi-Function Radar Temporal Behavior Analysis

The performance of radar mode recognition has been significantly enhanced by the various architectures of deep learning networks. However, these approaches often rely on supervised learning and are susceptible to overfitting on the same dataset. As a transitional phase towards Cognitive Multi-Functional Radar (CMFR), Adaptive Multi-Function Radar (AMFR) possesses the capability to emit identical waveform signals across different working modes and states for task completion, with dynamically adjustable waveform parameters that adapt based on scene information. From a reconnaissance perspective, the valid signals received exhibit sparsity and localization in the time series. To address this challenge, we have redefined the reconnaissance-focused research priorities for radar systems to emphasize behavior analysis instead of pattern recognition. Based on our initial comprehensive digital system simulation model of a radar, we conducted reconnaissance and analysis from the perspective of the reconnaissance side, integrating both radar and reconnaissance aspects into environmental simulations to analyze radar behavior under realistic scenarios. Within the system, waveform parameters on the radar side vary according to unified rules, while resource management and task scheduling switch based on operational mechanisms. The target in the reconnaissance side maneuvers following authentic behavioral patterns while adjusting the electromagnetic space complexity in the environmental aspect as required. The simulation results indicate that temporal annotations in signal flow data play a crucial role in behavioral analysis from a reconnaissance perspective. This provides valuable insights for future radar behavior analysis incorporating temporal correlations and sequential dependencies.

Molecular Break Junction: A Stage for Redox Transformations

AbstractAn exceptionally brilliant strategy to miniaturize electronic devices is to employ a single‐molecule between two electrodes for carrier conduction at single‐molecule break junctions (SMBJ). To understand the intrinsic mechanisms of operation at these junctions, extremely crucial is to study physical, chemical, and electrochemical properties employing single‐molecules at SMBJs. Further, redox‐based transformations at the nano‐junction could be achieved electrochemically to allow efficient switching between different redox states of a single‐molecule, showcasing the possibility of maneuvering transport properties with on‐off states of the molecule. Herein, are presented the fundamentals of SMBJs, and the electrochemically influenced transformations or switching of organic molecules pursued at SMBJs. Such an understanding of electrochemical phenomena at the nanoscale dimension could bridge the knowledge gap between macroscopic electronic circuits and single‐molecule electronic circuits, whereby the feasibility of switching between the states could maneuver the electronic properties as well as other photophysical parameters.

Optimization operation strategy of wind–pumped storage integrated system participation in spot market considering dual uncertainties

Abstract With the gradual increase in the penetration rate of renewable energy, the multifunctional role of pumped storage is becoming increasingly prominent, and the joint operation of “renewable energy + pumped storage” is a current research hotspot. However, during the joint system operation, there are dual risks from internal (renewable energy output) and external (market prices) factors, which significantly impact the system’s overall revenue. Therefore, an analysis is conducted around the operational mechanism of the “wind power–pumped storage” joint operation, and the uncertain factors faced during the system’s operation are identified. Second, an optimization model for wind power–pumped storage under deterministic scenarios is constructed, employing robust optimization theory and information gap decision theory to describe the uncertainty of electricity prices and wind power, thus forming a hybrid of the information gap decision theory and the robust optimization model for wind power–pumped storage. Finally, the results show that: (1) The total revenue of the model proposed in the paper has increased by 2.36% compared to the robust optimization model and by 9.04% compared to the deterministic model, significantly enhancing the model’s robustness and risk resistance capabilities. (2) From the perspective of the economic feasibility of different energy storage system configurations, the wind plant equipped with pumped storage has the highest economic feasibility, with an internal rate of return of 9.8% and net present value of 872 million Chinese Yuan, which is higher than that of compressed air energy storage and electrochemical energy storage systems. (3) Decision makers can set the risk deviation coefficient and the uncertainty budget according to their risk preferences, thereby changing the robustness of the model for differentiated decision making. However, an increase in the uncertainty budget coefficient will cause the total revenue of the joint operation system first to increase and then decrease, with the maximum revenue achievable within the range of 500–625; the total revenue reaches its maximum when the risk deviation coefficient is between 0.1 and 0.125.

An evaluate of ORR catalysts in fuel cell: Current Advances and Applications

Abstract. This thesis presents a comprehensive review of fuel cell technology, with a specific emphasis at the latest trends and programs of oxygen reduction response (ORR) catalysts. The examine starts offevolved with the aid of using evaluating the benefits and drawbacks of hydrogen fuel cells with different alternative power sources, which include sun power and secondary batteries, highlighting the ability of fuel cells to update traditional inner combustion engines because of their high power density and environmental benefits. The thesis then explores the essential running ideas of fuel cells and examines their operational mechanisms in numerous chemical environments. In the context of ORR catalysts, the assessment evaluates quite a number catalysts, which include precious metal catalysts, non-precious metal catalysts, and single-atom catalysts, that specialize in techniques to decorate their activity and stability. Finally, the thesis discusses the demanding situations and destiny possibilities for the industrial application of ORR catalysts in hydrogen fuel cells.

A Systematic Review of Brake Pad

The brake system is a mechanism that allows the vehicle to slow down and remain stationary. Most automobiles uses either one or both disk brake and drum brake system. These brake system components include the brake pedal, brake lines, brake master cylinder, brake booster, brake calipers, brake rotors/drum, and brake pads. The greatest load in the braking of a vehicle falls both on the discs and pads. The friction caused by braking on these parts results in a large amount of heat transfer and particulate emission. Therefore, studies on the brake system have focused on human health, the environment and the economy, in addition to investigating the operation, performance and wear mechanisms of the system. In this study, researchers, citations, keywords, and trending topics of 1,118 studies on brake pad between 1982 and 2023 were investigated by systematic analysis method using R and VosViewer analysis programs. A brief summary of the most cited papers and their topics is given to help researchers who will conduct studies on brakes. These studies focused on wear and emission issues. Non-exhaust emissions have adverse effects on air, aqueous media, roadways and human health. Therefore, it has become mandatory to limit these small particles, which is why they are included in the Euro 7 emission standard. Due to the limitations on braking, future researchers have been informed about the status of non-exhaust emissions.

A Novel Fast Contact Operating Mechanism of the Medium and Low Voltage Hybrid DC Current Limiting Circuit Breaker

In order to solve the problem of the slow initial speed caused by the large mass of the bistable permanent magnetic actuator (PMA) in the traditional bistable permanent magnetic–electromagnetic repulsion mechanism (PM-ERM), a novel fast contact operating mechanism is proposed by using the flexible spring system (SS) between the PMA and the ERM. The novel structure can separate the mass of the PMA and the ERM at the initial phase of the interrupting process, improve the initial speed of the contact and increase the initial opening distance of the contact. Firstly, the paper conducts an extensive investigation and analysis of the principle of the existing fast operating mechanism and points out the advantages and disadvantages of the existing mechanism. In order to meet the requirement of fast interrupting and improve the service life of the mechanism, a novel mechanism is proposed. And then, the working principle of the novel mechanism is introduced. The cooperative relationship between the ERM and the PMA and the working principle and performance parameter requirements of the ERM, SS and PMA are analyzed and designed. Finally, the feasibility of the novel mechanism is verified by the experiment. The results show that the opening distance of the novel operating mechanism can reach 2.25 mm in 1 ms. Compared with 1.24 mm of the traditional operating mechanism, it improves the initial opening distance of the contact by 81.5% and is conducive to the rapid interruption of the Hybrid DC current-limiting circuit breaker (HDCCLCB).

Biomass-Based Gas Turbine Systems for Power Generation: Sustainable Feedstocks and Environmental Benefits

This paper explores the significance and operational mechanisms of biomass-based gas turbine systems, which present a renewable and sustainable substitute for conventional fossil fuel-based electricity production methods. These systems utilize biomass as a source of fuel to produce heat, which is then converted into power through a gas turbine. The process involves the combustion of biomass fuel to heat a working fluid, such as air, which subsequently drives the turbine to produce electricity. Biomass can be derived from various organic materials, encompassing urban solid trash, forest residues, and agricultural residues, making it a versatile and sustainable fuel option. The paper also includes a practical case study, highlighting the system's advantages and disadvantages. Additionally, it identifies future trends, emphasizing the importance of efficiency enhancement. To achieve this, scientists are increasingly proposing hybrid systems that combine biomass-based gas turbines with other technologies. This approach aims to optimize performance, reduce emissions, and contribute to guaranteeing a future with more sustainable energy. The study underscores the potential of biomass-based gas turbine systems to play a crucial part in the shift to renewable energy sources.

DEVELOPMENT OF AGRICULTURAL SCIENCE ON THE PLATFORM OF INNOVATIVE BIOECONOMY

Ukraine's economy is in a state of crisis caused by the war. The agricultural sector in extreme conditions is trying to fulfill its function of ensuring the food security of the state, supporting its export potential despite limited resources and logistical problems. Agrarian science in the conditions of budget funding deficit is trying to find ways to use the scientific and experimental base, developed varieties and technologies to promote the stabilization and revival of agro-industrial production in the industry and regions. Effective models of implementing the innovative potential of agrarian science on a business basis are necessary.The purpose of the study is to justify the platform of market adaptation of science to crisis conditions and the mobilization of scientific potential in the breakthrough directions of the development of the agrarian sphere on the basis of innovative bioeconomy and close cooperation between science and business.To realize the set goal, the work assessed the possibilities of integrating science and business on the platform of innovative bioeconomy in the crisis economic and legal conditions of Ukraine; the bio-ecosystem of the platform and its operational mechanism of the partnership of science and business for the implementation of joint innovation and investment projects are substantiated. For the introduction of a well-founded bioecosystem, a set of measures is proposed for the formation of a platform in the system of agrarian science on the basis of conducted tests and adopted organizational decisions based on the example of the National Academy of Agrarian Sciences of Ukraine. Cooperation between agricultural science and business on the basis of the proposed public-private partnership platform ensures the mobilization of scientific potential to solve pressing issues of innovative development of agricultural production, rural areas through the creation and transfer of breakthrough and supporting bioinnovations, the production of competitive innovative agro-food products.

How Does Empathy Become Morally Energising for Agents? ——Michael Slote Emotionalist Ethics of Care Study

In the face of the moral decline exacerbating problems such as “indifference” and “ignorance” in present times, this article takes into account the background of the times, starts from the perspective of stimulating the moral action of the agents, and takes the empathy of the contemporary ethicist Michael Slote’s affective caring ethics as the core of the study, and further clarifies and elaborates the operation mechanism and its superiority and limitations of the “empathy-caring” emphasised by Slote in the moral life from the individual to group, by comparing it with rationalism. Through a comparative study with rationalism, the paper further clarifies and elaborates the operation mechanism of “empathy-caring” emphasised by Slote in the moral life from individual to group, as well as its superiority and limitations, especially, the Stole’s ethics has absorbed and developed the concept of yin and yang in Chinese thought, and provides a new way of thinking for explaining moral behaviours, solving moral dilemmas, and improving moral literacy.

Complexity and synchronization of carbon and new energy markets based on multiscale entropy

AbstractThis study provides a comprehensive analysis of the dynamic evolution of complexity and synchrony between the carbon market and the new energy market from 2019 to 2023, employing multiscale sample entropy and cross‐sample entropy methods. The study shows that, both in the long term and short term, the complexity of the new energy market consistently exceeds that of the carbon market. Additionally, the carbon and new energy markets exhibit higher synchronization on smaller scales. As the time scale increases, interactions between the carbon and new energy markets become more complex and diverse. According to these findings, it is recommended that policymakers improve the transparency of the new energy market, optimize the operational mechanisms of the carbon market, and ensure that carbon reduction strategies and new energy policies are mutually coordinated. This holds significant importance for both carbon reduction targets and the development of new energy.

Understanding and Mastering Multiphysical Fields Toward Dendrite‐Free Aqueous Zinc Batteries

AbstractAqueous zinc batteries (AZBs) have emerged as promising candidates for next‐generation grid‐scale energy storage due to their excellent safety, environmental friendliness, and abundance of Zn metal. However, undesired dendrite growth on Zn anodes, resulting from uneven Zn plating/stripping, leads to poor durability and low Coulombic efficiency, posing significant challenges for the practical application of AZBs. Multiple physical fields, the intrinsic driving force governing the distribution of electrons and ions, significantly impact Zn deposition behavior. The underlying mechanisms and regulation strategies related to this phenomenon has not been fully reviewed. This comprehensive review focuses on revealing the key physical fields influencing Zn deposition (including ionic flux, electric field, stress field, and temperature field) and summarizes the most effective control methods. Each approach is thoroughly scrutinized, highlighting its operational mechanisms, benefits, and limitations. Furthermore, the challenges and potential pathways for developing durable Zn anodes are outlined. Through in‐depth analysis of the influences of multiphysical fields on Zn deposition behavior, this review sets the foundation for enhancing the performance of Zn anodes, thereby supporting the advancement of Zn batteries commercialization.

Are Triboelectric Nanogenerators More Efficient Than Piezoelectric Transducers in Generating Energy from Precipitation?

This review examines two primary methods for harvesting energy from precipitation: triboelectric nanogenerators (TENGs) and piezoelectric transducers, which are leading technologies in converting mechanical energy from rain into electrical energy. The comparison between TENGs and piezoelectric transducers focuses on their operational mechanisms, material characteristics, and environmental factors such as water pH and temperature. The review highlights that TENGs offer greater design flexibility, efficiency in low-intensity rain, and cost-effectiveness, while piezoelectric transducers excel in high-frequency environments. The development of hybrid systems combining both technologies presents a more efficient and sustainable solution for rain energy harvesting.

Community-led management of the (urban) commons: lessons from the Narroways Nature Reserve, Bristol

ABSTRACT At a local level, the role of urban green spaces for tackling sustainability issues has received renewed attention, in line with a wider shift in thinking which places cities at the heart of sustainable development action. In parallel, funding for green space provision has reduced, prompting Local Authorities to reimagine how green spaces are governed, including transferring authority to communities. Preference for community-led green spaces is frequently justified with reference to normative arguments derived from “commons” theory, which advocate for self-governing institutions as effective means of managing local resources. What is lacking in this literature is a contemporary focus on urban settings, operational prescription, and an awareness of the real challenges facing self-governance. To fill this gap, the different interactions with, and claims over, a self-governed nature reserve in Bristol, UK, are investigated; alongside the operational and legal mechanisms deployed in its governance and management. Findings reveal that governing commonly held green space in an urban context is highly complex and requires reconciling a multiplicity of claims, interests, and values. This manifests in tensions and challenges for governance, including trade-offs between autonomy and wider support, problematic decisions around prioritisation; and difficulty in establishing and legitimising norms whilst advocating for shared use. This deep empirical case provides valuable insights for policymakers and theorists as they continue to make decisions concerning the future of urban green spaces, in different localities and across scales.

A Comprehensive Review of State-of-the-art Optical Methods for Methane Gas Detection

Methane (CH<sub>₄</sub>), a potent greenhouse gas, significantly contributes to climate change and global warming. Its impact over 100 years surpasses carbon dioxide (CO<sub>₂</sub>) by 28 times. Addressing methane emissions, particularly from oil and gas production activities such as transmission pipelines, is imperative. One promising avenue is the development of reliable sensors to detect and mitigate methane leaks and prevent hazardous issues. Optical-based methods present notable advantages, including versatility and remote operation, making them pivotal in this endeavor. This review article provides a concise overview of optical-based methane identification technologies, encompassing sensing materials, absorption spectra, operational mechanisms, and recent advancements. Potential perspectives are explored, and inferences from this assessment are also derived. Emphasizing the significance of optical fiber-based methane detection methods, the authors advocate for further research to support ongoing efforts and foster innovation in this critical area.