Types Of Resources Research Articles

The "sponge city" program as a system of adaptation methods to climate changes in reforming and forming the architectural environment

This article analyzes the implementation of the «Sponge city» concept in the formation and reform of the urban and architectural environment, as a comprehensive method of adaptation to the problems caused by climate change, which was caused by the global warming of our planet. In this concept, the emphasis is on the regulation of all types of water resources in the aspects of floods, swamps and inundations. One of the main reasons for accelerating the pace of global warming is rapid industrial development and urbanization. This led to increased use of resources, including water, which created major environmental risks. The problems of climate change have worsened not only due to the growth of gas emissions into the atmosphere, but also due to the rapid and unplanned urbanization of the urban environment, which was formed in the post-industrial period and reflects the greedy approach of society to the limited resources of the planet. Due to this, large-scale post-industrial processes took place in many countries of the world, which led to significant environmental problems. The urban population grew at a rapid rate, with the simultaneous construction of the necessary infrastructure, including housing, factories and roads. Such processes also took place in the People's Republic of China, due to which the issue of regulating water resources was raised in the country, and the concept of "Sponge city" was applied as an answer. On the example of several Chinese cities of Wuhan, Pingxiang and Haikou, where this concept was successfully applied, adaptation methods and complex approaches for reforming the existing urban and forming a new architectural environment were systematized. Based on them, an action algorithm for the implementation of these methods and technologies was developed as a program of communication of all large-scale levels among themselves. Applying this program, at the levels from the region to an individual building and vice versa. A self-regenerating system is formed - a "sponge city-region-ecosystem" as a complex of innovative methods of combating floods, inundation, wetlands, excess precipitation, which promotes adaptation to climate changes and ensures sustainability , safety and harmony of the environment.

Mixed-integer linear programming for project scheduling under various resource constraints

Project scheduling is an important management task in many companies across different industries. Generally, projects require resources, such as personnel or funds, whose availabilities are limited, giving rise to the challenging problem of resource-constrained project scheduling. In this paper, we consider the scheduling of a project consisting of precedence-related activities that require time and two types of resources for execution: storage resources representing, e.g., the project budget; and renewable resources representing, e.g., personnel or equipment. Storage resources are consumed by activities at their start or produced upon their completion, while renewable resources are allocated to activities at their start and released upon their completion. The resource-constrained project scheduling problem with consumption and production of resources (RCPSP-CPR) consists of determining a minimum-makespan schedule such that all precedence relations are respected, the demand for each renewable resource never exceeds its capacity, and the stock level of each storage resource never falls below a prescribed minimum. Due to the consideration of storage resources, the feasibility variant of this problem is NP-complete. We propose a novel compact mixed-integer linear programming (MILP) model based on a novel type of sequencing variables. These variables enable us to identify which activities are processed in parallel and whether a sequencing of activities is necessary to respect the resource capacities. Our computational results indicate that our novel model significantly outperforms state-of-the-art MILP models for all considered scarcity settings of the storage resources. Additionally, our results indicate a superior performance for instances of the well-known resource-constrained project scheduling problem (RCPSP).

A Review of Data Mining Strategies by Data Type, with a Focus on Construction Processes and Health and Safety Management.

The research question focuses on identifying which data mining (DM) methods, among supervised, unsupervised, and others, are most appropriate for certain investigation objectives, types, and sources of data, as defined by the authors. Scopus and ProQuest were the main sources from which we extracted studies in the field of construction, published between 2014 and 2023. The eligibility criteria applied in the selection of studies were based on the Preferred Reporting Items for Systematic Review and Meta-Analyses (PRISMA). For exploratory purposes, we applied hierarchical clustering, while for in-depth analysis, we used principal component analysis (PCA) and meta-analysis. The search strategy based on the PRISMA eligibility criteria provided us with 63 out of 2234 potential articles, 206 observations, 89 methodologies, 4 survey purposes, 3 data sources, 7 data types, and 3 resource types. Cluster analysis and PCA organized the information included in the paper dataset into two dimensions and labels: "supervised methods, institutional dataset, and predictive and classificatory purposes" (correlation 0.97-8.18 × 10-1; p-value 7.67 × 10-55-1.28 × 10-22) and the second, Dim2 "not-supervised methods; project, simulation, literature, text data; monitoring, decision-making processes; machinery and environment" (corr. 0.84-0.47; p-value 5.79 × 10-25--3.59 × 10-6). We answered the research question regarding which method, among supervised, unsupervised, or other, is most suitable for application to data in the construction industry. The meta-analysis provided an overall estimate of the better effectiveness of supervised methods (Odds Ratio = 0.71, Confidence Interval 0.53-0.96) compared to not-supervised methods.

Optimizing Biomass Supply Chains to Power Plants under Ecological and Social Restrictions: Case Study from Poland

The growing demand for social and regulatory forest ecosystem services can significantly modify the availability and cost of biomass for energy purposes. This article presents a model for optimizing biomass supply chains using a linear programming framework integrated with a geographic information system (GIS). Based on a given type of biomass resource, its calorific value, price, distance from the power plant, and transportation costs, the model identifies the optimal source of biomass, allowing it to cover the demand for the required total energy value with the lowest possible costs. The case study includes the Połaniec power plant in southeastern Poland and potential sources of forest biomass and agricultural straw within 100 km of the plant. The impact of constraints on the availability and cost of biomass was analyzed in the following scenarios: (1) all forest and agriculture biomass is available, (2) forest area in Natura 2000 network is excluded, and (3) firewood and forests with dominated ecological and social function are excluded. Unit costs of biomass varied depending on biomass availability and energy demands. The lowest unit costs of biomass (3.19 EUR/MJ) were for energy demand at the level of 1 TJ yearly for all kinds of biomass and the highest (4.91 EUR/MJ) for ecological and social constraints and energy demand 4 TJ. As energy demand increased, unit costs increased, and the ability to meet this demand with just one type of biomass decreased. The energy biomass sector can utilize the model to benefit both biomass producers and their final buyers.

Scheduling IDC-based virtual power plants considering backup power

The virtual power plant (VPP) can aggregate massive distributed resources to participate in power system operation. Different types of resources have been investigated to construct VPPs. Internet data centers (IDCs) are regarded as flexible power consumers that can potentially cooperate with power systems. This paper exhibits the insight for constructing VPPs based on IDCs while comprehensively considering the operational flexibility of the workloads and power supply devices. On the workloads, this paper models the temporal and spatial flexibility of workloads in detail. On the power supply devices, this paper explores their spare capacity with respect to the power supply reliability requirement. Then, a day-ahead scheduling method of the IDC-based VPPs is established based on the operational flexibility modeling. Case studies validate the proposed approach. Moreover, because of the coupling of workload dispatch and power supply device operation, the synergy effect does not equal the sum of its parts.

Integrated geophysical observations and information resources of the Kamchatka Branch of the Geophysical Survey of the Russian Academy of Sciences (Kamchatka Peninsula)

The article presents data on the types of observations and information resources of the Kamchatka Branch of the Geophysical Survey of the Russian Academy of Sciences (as of 2022), which can be used by scientific and educational organizations of the Russian Federation for studying precursors and developing methods for predicting earthquakes and volcanic eruptions, solving a wide range of research tasks in the field of geophysical monitoring of seismically active areas and others. Information resources and observation data are illustrated on the example of the Unified Information System of Seismological Data of the KB GS RAS and time series data of meteorological, hydrogeological observations and observations of volumetric radon activity in the soil gas at the Moroznaya station.

Sustainability Assessment in Mining: A CSR-Based Analysis Model for Social and Environmental Impact

AbstractA simple approach is proposed to study the main factors related to the mining activity’s impact on society, through a corporate social responsibility (CSR) qualitative analysis based on the type of raw materials extracted, either by mine site or firm. A CSR index is defined by 30 environmental and socioeconomic elements and, subsequently, it is weighted by three primary factors; the recycling rate, the transition to green energy, and geographical conditions. The proposed method is adaptable to any change in raw material needs over time and, depending on the analyzed country or region, is applicable to any type of mineral resource. The system can be used to drive engagement with the different stakeholders, add value to a project, and establish a CSR continuous improvement system.

Scheduling jobs to minimize a convex function of resource usage

Given a finite set of jobs and a common resource. Each job has the same processing time p, alongside an individual release date and deadline, and utilizes either zero or one unit from the resource. A schedule specifies a star time for each job, and it determines the resource usage over time. The objective is to minimize a separable convex function of the resource usage. Prior to our work, the existing body of research only tackled the scenario where p=1. We explore three variations of this fundamental problem, accompanied by applications drawn from existing literature. In the first variant, all jobs require one unit of the resource each. In the second and third variants, there are m parallel machines, and at most m jobs may be processed concurrently at any given moment. Furthermore, in the second variant, each job has a unit processing time, and may require either 0 or 1 unit of the resource. In the third case, there are ν distinct resource types each linked with a convex function, and each job requires precisely one of these resources types. The jobs have a uniform processing time p and possess agreeable release dates and deadlines. For each of these cases, we introduce novel polynomial-time algorithms designed to determine optimal solutions.

Improving interdependent urban power and gas distribution systems resilience through optimal scheduling of mobile emergency supply and repair resources

Urban electric power and natural gas systems, serving as the most critical facilities that provide fundamental support to people's daily life, have been increasingly interdependent in their operation over the past decades. This growing interdependency presents great challenges and demands for enhancing the resilience of the interdependent systems, particularly driven by the recent cold weather events. In this paper, we propose a comprehensive strategy for scheduling various types of emergency resources, including mobile and stationary generators, repair crews, and fuel tankers, with the goal of enhancing the resilience of interdependent power and gas distribution systems in the aftermath of disasters. In particular, the strategy incorporates the routing of mobile resources to orchestrate their dynamic moving behaviors. Fuel supply issue for mobile and stationary distributed generators is also addressed through modeling the fuel exchange processes among generators, fuel tankers, and locations. Furthermore, we present a model of repair process to fully capture the real-world repair activities, allowing varying numbers of repair crews to work in a cooperative way. The proposed strategy is formulated into a tractable mixed-integer second-order cone problem. Finally, case studies are carried out to demonstrate the effectiveness of the strategy in enhancing the resilience of the interdependent power and gas distribution systems.

Insights into plant-based food resource harvesting and processing: A microfossil analysis of stone tools at the Xinzhai Site, China

The Xinzhai site, located in the heartland of China’s Central Plains, served as the capital site of the Xinzhai Period (1850–1750 BCE), representing a transitional phase from the Longshan Culture (ca. 3000–1900 BCE) to the Erlitou Culture (1750–1520 BCE). To investigate the types of plant-based food resources that were harvested and processed, along with the tools and methods that were used, we analyzed plant microfossils (primarily starch and phytoliths) recovered from 29 stone tools that were suspected to be related to the harvesting and processing of plant-based food resources. Research findings suggest that millets (Setaria italica and Panicum miliaceum) were the primary crop harvested and processed by residents of the Xinzhai site, followed by Job’s tears (Coix lacryma-jobi), rice (Oryza sativa), and beans (Fabaceae). Additionally, tubers and nuts served as supplementary food resources, however further investigation is required to understand the utilization of wheat (Triticum aestivum). Stone knives served as the primary harvesting tools, with single-plant earhead cutting being the predominant harvesting method. In contrast, the widespread adoption of batch-harvesting methods using stone sickles was not evident. Stone mortars and grinding rods were the two types of processing tools found at the site. Although relatively few starch grains were found on these tools, phytoliths were abundant. However, grinding rod likely did not play a role in the processing of plant-based foods. Furthermore, stone mortars may have been used in conjunction with wooden pestles instead of stone pestles. Notably, some whetstones, may have functioned as grinding slabs in conjunction with grinding rods.

Examining the resilience of two early career world language teachers: a two-year case study

ABSTRACT Language teachers’ resilience, or their socially-mediated capacity to adapt to adverse conditions and thrive, has garnered attention amidst evolving challenges to language education and bilingual teachers in diverse spaces. Taking an ecological-collective perspective towards language teacher resilience, this qualitative case study examined the experiences of two early career Spanish world language teachers in the United States, paying particular attention to the personal and contextual resources they leveraged for their resilience during and after their transition into teaching. Through a series of semi-structured interviews, three themes were identified representing the varied purposes for which the Spanish teachers mobilised resources for their resilience at different times: planning for resilience in advance during the job search, maintaining resilience amidst initial struggles, and reestablishing resilience. Findings show that the types of resources used by the early career world language teachers shifted over time and based on need, the most salient of which included their knowledge of their teaching context, their agency and persistence, support and autonomy from their school administrators, and connections with networks of other language teachers. Implications for teacher education programmes, language teacher resilience, and future research are discussed.

Social support, psychological capital, multidimensional job burnout, and turnover intention of primary medical staff: a path analysis drawing on conservation of resources theory

BackgroundJob burnout is a prevalent and emerging challenge in the primary medical system, causing mass turnover, especially of primary medical staff. Little attention has been paid to the different dimensions of job burnout (emotional exhaustion, personality disintegration, and reduced sense of achievement), which may hinder efforts to tackle high turnover intention among primary medical staff. From the perspective of conservation of resources theory, social support and psychological capital are basic resources with potential to diminish job burnout and thus lower turnover intention. However, there is insufficient research evidence on the relationships between social support, psychological capital, and the three dimensions of job burnout within the primary medical system.ObjectivesFocusing on primary medical staff, this study conducts a path analysis to examine the correlations between two types of resources (social support and psychological capital) and the three dimensions of job burnout, and to test the impact of the latter on turnover intention. Based on the results, effective management strategies to improve the work stability of primary medical staff are proposed.MethodsMulti-stage cluster random sampling was used to select participants in Anhui Province, China. Data were collected using a self-administered questionnaire containing measures of the main variables and demographic questions. In total, 1132 valid questionnaires were returned by primary medical staff. Structural equation modeling was used for path analysis of the data.ResultsSocial support was negatively associated with emotional exhaustion (β = − 0.088, P = 0.020), personality disintegration (β = − 0.235, P < 0.001), and reduced sense of achievement (β = − 0.075, P = 0.040). Moreover, psychological capital was negatively associated with emotional exhaustion (β = − 0.079, P = 0.030), personality disintegration (β = − 0.156, P < 0.001), and reduced sense of achievement (β = − 0.432, P < 0.001). All three dimensions of job burnout positively affected turnover intention (emotional exhaustion: β = 0.246, P < 0.001; personality disintegration: β = 0.076, P = 0.040; reduced sense of achievement: β = 0.119, P = 0.001).ConclusionsThe results highlight the importance of social support and psychological capital for diminishing the three dimensions of job burnout for primary medical staff and, in turn, lowering their turnover intention. Accordingly, to alleviate job burnout and improve staff retention, material and psychological supports from leaders, colleagues, family, relatives, and friends are essential, as are measures to improve the psychological energy of primary medical staff.

Does "Dr. Google" improve discussion and decisions in small animal practice? Dog and cat owners use of internet resources to find medical information about their pets in three European countries.

Modern dog and cat owners increasingly use internet resources to obtain information on pet health issues. While access to online information can improve owners' knowledge of patient care and inform conversations with their veterinarian during consultations, there is also a risk that owners will misinterpret online information or gain a false impression of current standards in veterinary medicine. This in turn can cause problems or tensions, for example if the owner delays consulting their veterinarian about necessary treatment, or questions the veterinarian's medical advice. Based on an online questionnaire aimed at dog and cat owners in Austria, Denmark and the United Kingdom (N = 2117) we investigated the use of internet resources to find veterinary medical information, the type of internet resources that were used, and whether owner beliefs explain how often they used the internet to find medical information about their pet. Approximately one in three owners reported that they never used internet resources prior to (31.7%) or after (37.0%) a consultation with their veterinarian. However, when owners do make use of the internet, our results show that they were more likely to use it before than after the consultation. The most common internet resources used by owners were practice websites (35.0%), veterinary association websites (24.0%), or 'other' websites providing veterinary information (55.2%). Owners who believe that the use of internet resources enables them to have a more informed discussion with their veterinarians more often use internet resources prior to a consultation, whereas owners who believed that internet resources help them to make the right decision for their animal more often use internet resources after a consultation. The results suggest that veterinarians should actively ask pet owners if they use internet resources, and what resources they use, in order to facilitate open discussion about information obtained from the internet. Given that more than a third of pet owners use practice websites, the findings also suggest that veterinarians should actively curate their own websites where they can post information that they consider accurate and trustworthy.

Update of the Interpretive Conceptual Model of Ladeira de Envendos Hyposaline Hydromineral System (Central Portugal): A Contribution to Its Sustainable Use

The aim of this paper is to describe the surveys performed in order to update the interpretive conceptual circulation model of the Ladeira de Envendos hyposaline hydromineral system (Central Portugal). The geology of the Ladeira de Envendos region is strongly controlled by the Amêndoa-Carvoeiro synform, of Ordovician-Silurian age, presenting continuous and aligned quartzite ridges on the NE flank, that form the basic structure of a set of inselbergs. The physico-chemical analysis of the Ladeira de Envendos natural mineral spring and borehole waters was provided by the Super Bock Group Enterprise (Concessionaire of the Ladeira de Envendos). Furthermore, two sampling campaigns took place to increase knowledge on the isotopic composition of the studied natural mineral waters. The stable (δ2H, δ18O) isotopic data indicate that local meteoric waters infiltrate around 400 m altitude and evolve to the natural mineral waters (of Cl-Na facies) through a NW–SE underground flow path ascribed to the highly fractured and permeable quartzite rocks. From recharge to discharge, the infiltrated meteoric waters acquire silica (±9 mg/L) due to water–quartzite rock interaction. These natural mineral waters emerge at temperatures around 21 °C, being the up flow of these waters controlled by the rock fractures and local faults. The natural mineral waters mean residence time range between 25 and 40 years, as indicated by the 3H content of these waters, enhancing an active recharge of this hydromineral system. The results obtained indicate existence of three hydrogeological subsystems, ascribed to three inselbergs, with similar groundwater circulation paths. These multi and interdisciplinary studies should be seen as an important contribution to the sustainable management of this type of natural mineral water resources.

The bisexual natural gynogenetic blunt snout bream lineage derived from the distant hybridization of female blunt snout bream and male Bleeker's yellow tail

Distant hybridization often results in the generation of naturally gynogenic offspring. However, there are currently few reports about fertile natural gynogenetic bream. In this study, we established a natural gynogenetic blunt snout bream (NGBSB-YT, F1) through distant hybridization from female blunt snout bream (Megalobrama amblycephala, BSB) × male Bleeker's yellow tail (Xenocypris davidi Bleeker, YT), and further obtained NGBSB1-YT (F2) by self-cross. Except for the morphological characteristics, the DNA content, chromosome numbers, and 5 S rDNA sequences of NGBSB1-YT had no significant difference compared to those of BSB. The results of gonad sections showed that NGBSB1-YT was bisexual. The NGBSB2-YT (F3) obtained by self-cross further proved the fertility of NGBSB1-YT. Interestingly, the results of microsatellite (prime XD007) analysis and sox9 sequence analysis confirmed that paternal DNA fragments were inserted in NGBSB1-YT. This study has established a lineage of natural gynogenetic bream(F1-F3), that provides a reference for improvement of the theory of natural gynogenesis in fish. The NGBSB-YT lineage can be used as a new type of germplasm resource of bream.

(071) IMPROVING TRAINEE COMFORT IN ASSESSMENT AND MANAGEMENT OF FEMALE SEXUAL HEALTH AND MENOPAUSE THROUGH AN INTERACTIVE WORKSHOP

Abstract Introduction Concerns related to female sexual health and menopause are common in clinical practice, but these topics are often inadequately covered during training. Many medical schools and residency programs lack a formal curriculum, and trainees in internal medicine, family medicine, and obstetrics and gynecology often graduate feeling uncertain in their management of these conditions. Objective Improve resident comfort with assessment and management of female sexual health and menopause through an interactive workshop. Methods We created a 90-minute, interactive workshop focused on female sexual health and menopause. Residents in internal medicine at a large academic medical center were invited to participate. A multidisciplinary group including physicians, advanced practice providers, registered nurses and a certified sex therapist were recruited to lead the workshop. Results Participants rotate through three 30-minute sessions targeted to learning objectives. One session focuses on conducting a symptom-based pelvic exam. A 3-dimensional model is used to review the anatomy of the female pelvic floor and demonstrate physical exam techniques to evaluate vaginal and vulvar symptoms, pelvic pain, and dyspareunia. Diagnostic skills include vulvar inspection to assess for skin and mucosal changes, cotton swab test of the vestibule, and assessment of pelvic floor musculature. A second session focuses on the genitourinary syndrome of menopause (GSM). The pathophysiology, presentation and treatment of GSM is introduced. Next, registered nurses with expertise in female sexual health and menopause lead an interactive demonstration of vaginal moisturizers and lubricants. Advice for counseling patients on the proper use and application of vaginal estrogens is also reviewed. The final session focuses on sexual health counseling, including sexual history-taking skills. Participants are taught about the domains of sexual function, female sexual response cycle, types of desire, patient resources, and sexual aids. Feedback following the initial iteration of this workshop was very positive. All participants felt that the experience was an effective use of time, would recommend it to others, and were confident in their ability to apply skills to their clinical practice. Conclusions This interactive workshop led by a multidisciplinary group of providers aims to improve trainee comfort in evaluation and management of female sexual health and menopause. Given the commonplace nature of these topics in primary care and paucity of existing curricula, consideration could be given to the inclusion of a similar educational experience into internal medicine, family medicine and/or obstetrics and gynecology residency programs. Disclosure No.

Different types of online social exchanges: Effects on online sellers’ sales performance

This study examines different types of interactions in online communities for e-commerce sellers. Drawing on social exchange theory and using machine learning techniques to differentiate individuals’ interactions in the online community, we examine the impact of exchanging two major types of resources—tangible assistance and knowledge—on e-commerce sellers’ online sales. The findings demonstrate that online sellers engaging in more interactions that involve receiving tangible assistance or knowledge tend to realize better online sales performance, while interactions involving providing tangible assistance or knowledge also may benefit sellers’ sales performance through increasing the receipt of resources. In addition, sellers more active in receiving knowledge tend to have higher sales in markets in which they face greater competition intensity. Our study contributes to both research and practice with a more nuanced understanding of interactions in online communities—that is, providing and receiving different types of resources—and their associated sales outcomes.

Aggregation of building predictive energy flexibility in smart microgrid

Numerous demand-side resources possess significant potential to offer substantial flexible reserves and ancillary services, thereby enhancing the economic and technical performance of power systems within the demand response domain. A novel approach to aggregating the energy flexibility of buildings based on the virtual battery model is proposed in the smart microgrid, employing predictive control techniques while ensuring consumer privacy. The individual approximation process is implemented to extract the flexible capacity of local resources while protecting information privacy. Subsequently, the aggregator collects the flexibility information to develop an optimization strategy for maximum flexibility aggregation at the upper level, enabling the broader exploitation of global flexibility. The feasibility of power disaggregation is guaranteed according to the aggregation procedure. Furthermore, the comprehensive framework accommodates temporal preferences for flexibility requests from the aggregator. Numerical simulations are conducted to perform a comparative analysis with existing state-of-the-art methods. The results demonstrate that the proposed approach exhibits improved adaptability in characterizing the aggregate flexibility from buildings, effectively managing the heterogeneity of load characteristics and the variability in the collected flexibility information. Microgrids can realize cost savings and achieve dynamic flexibility utilization. This methodology can be extended and applied to diverse types of flexible resources.

Efficient extraction of the structural lithium from cookeite through a combined approach of roasting-leaching, co-precipitation, and elution

Clay-type lithium (Li) resources, as a new type of Li resources, have great commercial development value. In this study, the occurrence state of Li in a clay-type Li ore was systematically determined, and the results indicated that Li was dominantly accommodated in the interlayer hydroxide sheets of di-trioctahedral chlorite (i.e., cookeite), as a structural state. The efficient selective extraction of structural Li from cookeite was achieved using a combined approach of roasting-leaching, co-precipitation, and elution. Firstly, after simple sedimentation-purification, the resulting sample was treated with the roasting‑sulfuric acid (H2SO4) leaching method to obtain a lixivium containing Li and Al and to efficiently exclude Si. During this process, the cookeite completely dissolved and the structural Li was efficiently released into lixivium. Under the optimal conditions, the leaching efficiencies of Li and Al were up to 83.2% and 86.1%, respectively. Subsequently, sodium hydroxide (NaOH) solution was added into the lixivium to obtain a mixed precipitate of Li/Al-layered double hydroxide (Li/Al-LDH) and Al(OH)3, with a maximum precipitate efficiency of Li of 95.4%. Finally, the resulting Li/Al-LDH was roasted and then eluted with water. The maximum elution efficiency of Li was 95.3% under optimal conditions. In this procedure, the Li/Al-LDH transformed into Al2O3 to separate Li after roasting, and the released Li was easily eluted with water. The findings of this study contribute to the understanding of the occurrence state of Li in clay minerals, and the proposed approach can not only provide a promising strategy for the efficient industrial extraction of Li from clay-type Li resources but also achieve the co-recovery of Al.

Analysis and Optimization of Operating Modes of Mini-CHP on Local Fuels in Conditions of Surplus Electric Power Capacities in the Unified Energy System of Belarus. Part 1

The paper presents the results of a study to determine the rational structure of mini-CHP (Cogeneration Heat and Power Plant) using local fuels types (LFT) for operation as part of the United Energy System (UES) of Belarus with a surplus of electricity generating capacity and dominance of imported types of energy resources (natural gas and nuclear fuel) in the fuel balance. When optimizing the operating modes of mini-CHPs using LFT and operating in parallel with the UES, which has a significant surplus of electricity generating capacity, it is necessary to separate options for existing stations and options for newly built ones. In the first case, due to the fact that the power of the equipment is known, it is advisable to consider two extreme options, i.e., the operation of the heating unit according to an electrical or thermal load schedule. In this case, in order to maintain the daily consumption traffic it is necessary to provide for the accumulation of thermal or electrical energy, respectively. In the case of new construction, the optimized parameter is the power of the generating equipment, so it is advisable to give preference to the option with the maximum number of hours of use of the rated power. In order to increase the economic attractiveness of mini-CHP, options for developing the structure of mini-CHP using LFT with the transition to multi-generation technologies and adaptation to the existing operating conditions of the UES of Belarus have been considered. The results of an analysis of commercially available technologies for storing excess electrical energy are presented in accordance with current and projected (until 2030) cost and operational indicators. For adapting mini-CHP to operate in the UES in conditions of a surplus of electrical power capacity, an electrical energy storage system using hydrogen as an intermediate energy carrier is of greatest interest. To utilize the excess electrical energy consumption from a mini-CHP with a heating ORC unit during the daily dips, a structural diagram configuration using an alkaline electrolysis module for hydrogen production is proposed. The efficiency of energy storage and use technology is considered depending on the specific energy intensity for various electrical energy storage technologies. The use of the two most energy-intensive energy storage technologies is proposed: accumulation based on electrochemical batte-ries and the “electricity-hydrogen” type. During the study, an analysis of the functioning of the ORC-installation Turboden 14 CHP ORC-installation operating as part of a mini-CHP using LFT was carried out. It was revealed that today the installation operates in a wide range of load changes (from 17 to 87 % of the rated electrical power), while the generation of electrical energy from thermal consumption varied in the range from 0.20 to 0.026 MW/MW. Due to the fact that the ORC installation under study is a component of the energy source with a high installed peak thermal power, in the current state there is no direct correlation between the outside air temperature and the generation power of the ORC installation. This circumstance indicates the need to continue the study of heat load trends to build functional models for short- and medium-term forecasting of heat load depending on the time of day and average hourly outside air temperature, which was implemented in the second part of the work.