The quality of surimi-based products is intricately linked to the functional characteristics of myofibrillar proteins (MPs). Notably, MP oxidation during surimi processing impacts its functional ...properties, adversely affecting surimi-based products. Therefore, providing a timely and thorough overview of protein oxidation within surimi processing and emerging control techniques is significant for developing high-quality products.
In this review, we explored the effects of protein oxidation on the quality of surimi. The pathways and mechanisms underlying protein oxidation during surimi processing steps were comprehensively summarized. A comprehensive review of emerging control methods to mitigate protein oxidation was also conducted.
Pro-oxidants from surimi processing inevitably induce MP oxidation, resulting in deleterious effects on processing and nutritive quality. Various strategies have been proposed to control protein oxidation, including stress response reduction, pro-oxidant removal, cryoprotection technologies, and antioxidant supplementation. However, a comprehensive understanding of the mechanisms and control strategies for protein oxidation is lacking owing to the complex composition and production intricacies of surimi. Certain bio-friendly and naturally exogenous antioxidants and cryoprotectants exhibit substantial potential for efficacious control of protein oxidation, transcending the need for accurate modulations of surimi processing steps.
•Oxidation of myofibrillar proteins deteriorates the quality of surimi.•Pathways and mechanisms of protein oxidation in surimi processing were summarized.•Emerging techniques against protein oxidation were proposed.
•In the commercially available offer, current systems almost all work fully centralized lacking flexibility, robustness, and scalability. But a trend towards a decentralized control is emerging.•The ...abundance of literature shows us that many algorithms already exist for the control of AGV systems in lab environments, both central and decentral.•The industry 4.0 paradigm will push AGV manufacturers to think about decentralization as systems will become even larger and complex.•More decentralized and market-based techniques are suited to introduce flexibility and scalability in the system.•The control of an AGV system can be decomposed into five core tasks which are task allocation, navigation, path planning, motion planning and vehicle management.
Automated guided vehicles (AGVs) form a large and important part of the logistic transport systems in today's industry. They are used on a large scale, especially in Europe, for over a decade. Current employed AGV systems and current systems offered by global manufacturers almost all operate under a form of centralized control: one central controller controls the whole fleet of AGVs. The authors do see a trend towards decentralized systems where AGVs make individual decisions favoring flexibility, robustness, and scalability of transportation. Promoted by the paradigm shift of Industry 4.0 and future requirements, more research is conducted towards the decentralization of AGV-systems in academia while global leading manufacturers start to take an active interest. That said, this implementation seems still in infancy. Currently, literature is dominated by central as well as by decentral control techniques and algorithms. For researchers in the field and for AGV developers, it is hard to find structure in the growing amount of algorithms for various types of applications. This paper is, to this purpose, meant to provide a good overview of all AGV-related control algorithms and techniques. Not only those that were used in the early stages of AGVs, but also the algorithms and techniques used in the most recent AGV-systems, as well as the algorithms and techniques with high potential.
Switched reluctance motors are a potential competitor to permanent magnet motors and induction motors for various industrial applications. The switched reluctance motors without permanent magnets ...have gained increased interest due to their simple structure, low cost, robustness, and high fault tolerance. However, the nonlinear characteristics caused by the double salient structure limit its wide applications. Advanced control techniques have been developed to suppress torque ripple, enhance anti-disturbance ability, reduce the switching frequency, expand speed range, and improve efficiency. The control strategies such as direct torque control and control algorithms like sliding mode control are two main approaches considered. Previous work only focuses on one side of control techniques. Thus, based on various control techniques proposed in recent years, this review classifies and summarizes their benefits and shortcomings. In addition, some essential trends in control development are presented and highlighted as future perspectives.
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•The fundamentals including the SRM model and power converter are investigated and summarized.•Advanced control strategies of SRM are comprehensively illustrated and discussed.•The control algorithms including state-of-the-art control approaches with multiple control techniques are classified and analyzed.•Future perspectives of this emerging area have been pointed out.
The carbon dioxide (CO2) crisis is one of the world's most urgent issues. Meeting the worldwide targets set for CO2 capture and storage (CCS) is crucial. Because it may significantly reduce energy ...consumption compared to traditional amine-based adsorption capture, adsorption dependant CO2 capture is regarded as one of the most hopeful techniques in this paradigm. The expansion of unique, critical edge adsorbent materials has received most of the research attention to date, with the main objective of improving adsorption capacity and lifespan while lowering the temperature of adsorption, thereby lowering the energy demand of sorbent revival. There are specific materials needed for each step of the carbon cycle, including capture, regeneration, and conversion. The potential and efficiency of metal-organic frameworks (MOFs) in overcoming this obstacle have recently been proven through research. In this study, we pinpoint MOFs' precise structural and chemical characteristics that have contributed to their high capture capacity, effective regeneration and separation processes, and efficient catalytic conversions. As prospective materials for the next generation of energy storage and conversion applications, carbon-based compounds like graphene, carbon nanotubes, and fullerenes are receiving a lot of interest. Their distinctive physicochemical characteristics make them suitable for these popular study topics, including structural stability and flexibility, high porosity, and customizable physicochemical traits. It is possible to precisely design the interior of MOFs to include coordinatively unsaturated metal sites, certain heteroatoms, covalent functionalization, various building unit interactions, and integrated nanoscale metal catalysts. This is essential for the creation of MOFs with improved performance. Utilizing the accuracy of MOF chemistry, more complicated materials must be built to handle selectivity, capacity, and conversion all at once to achieve a comprehensive solution. This review summarizes, the most recent developments in adsorption-based CO2 combustion capture, the CO2 adsorption capacities of various classes of solid sorbents, and the significance of advanced carbon nanomaterials for environmental remediation and energy conversion. This review also addresses the difficulties and potential of developing carbon-based electrodes for energy conversion and storage applications.
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•This review summarizes, the most recent developments in adsorption-based CO2 combustion capture•Technologies such as post-combustion, oxyfuel, and precombustion are used for carbon adsorption.•Carbon Capture and Storage (CCS) plays a vital role in reducing carbon emissions.•Cellulose and Metal–organic frameworks (MOFs) based carbon materials for CO2 adsorption.•CO2 adsorption by the clay-based carbon materials.
The increased power demand needs the installation of more power-generating units. Apart from conventional power generating stations based on fossil fuel combustion, recently solar power generating ...stations have attracted a large stake due to various advantages. However, the increased power generation also needs to be focused on various factors like stability, and reliability of the grid system leading to putting more emphasis on active power control techniques. This article reviews different active power control methods including conventional and flexible horizons. The focus of this article is to analyze the reliability factor while extracting power from solar plants. Maximum power point tracking (MPPT) is a well-known strategy for the maximum utilization of solar energy. However, as the dependency on solar energy rises the conventional control strategy needs to be modified for active grid participation of the PV systems. This can be performed by incorporating Flexible Power Point Tracking (FPPT) control strategies instead of MPPT. In this article, a comparison of the two techniques has been performed to choose the best method based on the requirement. Further, the impact of both systems on the grid system has been briefed in this article. Also, benchmarking has been proposed from the analysis to switch over between the modes depending on the power availability.
•Extensive literature has been done on AC, DC, AC-DC coupled hybrid MGs categorizing various control methods in the hierarchical control scheme.•The different methods for ILC controlling have been ...discussed for AC-DC coupled architecture.•Comparative studies of stability issues in MGs and improvement methods in possible MG architectures are discussed.•A thoroughly investigation has been done in terms of the factors that affect MG stability, such as voltage and frequency stability issues.•To highlight the uniqueness of the current work, a comparison study was undertaken between the available literature survey and the current work, concentrating on different elements.
The utility grid integration of distributed generation units is seen as one of the most accomplished through the use of microgrid. Control methods and stability analyses in the microgrid are continuously being investigated in the field of hybrid microgrid. The most reviewed control method is hierarchical control, consisting of primary, secondary, and tertiary layers. This paper reviews multiple schemes of primary control for current or voltage regulation, secondary control for voltage or current error correction, power-sharing in microgrid, and tertiary control for power flow and energy management in a hybrid microgrid system. Additionally, this study examines the benefits and drawbacks of several control architectures that function as distributed, centralized, and decentralized controls. The principle of operation and effectiveness of each microgrid architecture control method have been discussed. Specific control factors are investigated in this paper, including mode transition and coordinated control between numerous interlinking converter and energy storage systems. System stability is the main concern of microgrid for system engineer thorough knowledge of control strategies is the upmost requirement. Thus, this paper highlights control strategies, rotor angle, voltage and frequency instability in power systems, and methods for improving stability in microgrid are also reviewed.
Recently multilevel inverters (MLI) have attracted more attention in research and industry, as they are changing into a viable technology for several applications. The concept of MLI was introduced ...for high power and high/medium voltage applications as they can provide an effective interface with renewable energy sources. Developing of reduced switch MLI topology has been a rapid research topic since the past decade, which has not been reviewed so far. Therefore, this review article focuses on the different reduced switch MLI topologies under three categories such as symmetric, asymmetric and hybrid configurations. The important knowledge on these topologies is carefully tabulated based on the three categories in the comparison tables to understand the essential parameters of the MLI topologies. These configurations are not only generating higher voltage levels to improve the power quality but also to reduce the passive filter requirements. Also, this review includes a detailed perspective of various modulation techniques and control strategies for MLI topologies. In addition to that, the different performance parameters of MLI and its calculation methods are discussed with appropriate mathematical expression. This review will help in the selection of appropriate MLI topology for FACTS, motor drives and renewable applications.
In recent times, the need for energy consumption is drastically increasing to fulfill the global requirements of commercial and domestic consumer demands. Energy generation using conventional methods ...such as oil and gas are not appreciated in the modern era since they are the major contributors for pollution and global warming. To tackle these issues, energy generation using hybrid renewable energy is being opted and studied universally. However, renewable energy sources have their fair share of drawbacks such as photovoltaic systems rely on the surrounding irradiance and temperature, wind system experiences irregular wind speed, and fuel cells are expensive and less efficient. Also, the energy extracted from renewable sources persist with stochastic behavior. To deal with these issues, researchers utilize different power electronic devices such as inverters, active power filters, voltage regulators, power quality conditioners, and DC-DC converters. Among these power electronic devices DC-DC converters are highly effective for DC voltage regulation and to improve the efficiency of renewable energy systems. Appropriate selection of the DC-DC converter is an important factor that has significant contribution in overall performance of the power systems. Besides, the selection of an efficient DC-DC converter topology, for its optimum operation integration of a suitable control technique is equally important. This paper highlights the characteristics of available and on-going trends of non-isolated converters that includes buck-boost, single ended primary inductor converter, cuk, z-source, zeta, and hybrid DC-DC converters based on the performance parameters that are analyzed using MATLAB Simulink. Control techniques that include proportional integral derivative (PID), slide mode control (SMC), model predictive control (MPC), state space modeling (SSM), and fuzzy logic control (FLC) are also discussed considering the parameters settling issue, response time and complexity while integrating with non-isolated DC-DC converters in power systems.
Sustainable waste derived biodiesel can substitute significant amount of fossil-based fuels currently used for marine propulsion, agricultural processes, small scale power generation, and in heavy ...goods vehicles. However, biodiesel fuel quality varies depending on the feedstock type, production method and storage conditions. Meeting biodiesel standards and reduction of NOx emissions are two main challenges when biodiesels are being used in the internal combustion engines. This study aims to address these two challenges by using biodiesel-biodiesel blending and various NOx reduction techniques. Biodiesels produced from waste resources and inedible plant seed oils are investigated. Fuel properties, biodiesels standards, and engine test results are reviewed. It was found that blends of animal fat biodiesels and vegetable oil biodiesels are likely to improve fuel properties and combustion characteristics. The biodiesel-biodiesel blends also help to reduce exhaust pollutants. The saturation level of the biodiesel fuel is increased through this technique. Animal fat biodiesels are composed of saturated fatty acid methyl esters, and vegetable oil biodiesels are composed of unsaturated fatty acids. The NOx gas emission reduction techniques are investigated and categorised under three sub-groups, fuel treatment, engine adjustment and exhaust after-treatment. Based on the state of art review, scopes for future R&D topics are presented for researchers and relevant industries.
•Blends of animal fat and WCO biodiesels can improve the fuel properties.•Biodiesel emulsification by 30% water can reduce the NOx emission by up to 60%.•Antioxidant additives can reduce biodiesels NOx emission by up to 9%.•Water injection through inlet manifold can reduce biodiesels NOx emission by 50%.•SCR is the leading NOx mitigation technique with efficiency of up to 85%.
As a typical clean production technology, green control techniques and their adoption are influenced by peer effects. Thus, what is the formation mechanism of the peer effects? Will there be a ...heterogeneous impact due to differences in the social network position of farmers? Will this impact be moderated by attention allocation? To answer these questions, based on the survey data for 1109 farmers in five provinces on the North China Plain, this paper adopted the IV-Probit model and other research methods. We found peer effects in the adoption behavior of green control techniques among farmers, which only existed in core and intermediate farmers and not in marginal farmers. The peer effects of the farmers' adoption behavior of green control techniques mainly came from the learning imitation mechanism. With the enhancement of farmers' attention allocation, the peer effects of farmers' adoption behavior of green control techniques strengthened. Therefore, it is necessary to give full consideration to the positive role of peer effects on farmers, improve the attention allocation level of farmers, and provide the service resources for agricultural technology extension to marginal farmers to accelerate the diffusion of green control techniques.
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