bluuebunny/crossref_metadata_2025_split huggingface dataset:
Dynamic Pricing and Energy Management of Electric Heating Integrated Energy System Based on Stackelberg Game
Authors: Wang Y. , Feng G. 
Published: August 2022

This paper investigates the dynamic pricing and energy management of integrated electric and thermal energy systems through the Stackelberg game approach, for the upper tier leader problem, the revenue of the integrated energy system as a whole is used as the objective function, taking into account the electricity price and related constraints such as the heat price, for the lower follower problem, a leader-follower Stackelberg game model is constructed with the highest user satisfaction as the objective function, Constraints such as power balance conditions and thermal balance conditions of the system are also taken into account, The upper level of the model is solved using a differential evolutionary algorithm, Lower level solver using CPLEX solver. The simulation results show that the proposed model not only effectively weighs the interests of the integrated energy system and the customer aggregator, but also achieves a win-win situation for both the customer aggregator and the external grid, and the solution algorithm used protects the data privacy between the integrated energy system and the customer aggregator.
В данной работе исследуется динамическое ценообразование и управление энергией в интегрированных электрических и тепловых энергетических системах с помощью подхода игры Штакельберга. Для проблемы лидера верхнего уровня в качестве целевой функции используется доход интегрированной энергетической системы в целом, принимая во внимание цену на электроэнергию и связанные ограничения, такие как цена на тепло. Для проблемы нижнего уровня последователя строится модель игры лидер-последователь Штакельберга с наибольшим удовлетворением пользователя в качестве объективной функции. Учитываются такие ограничения, как условия баланса мощности и условия теплового баланса системы. Верхний уровень модели решается с помощью дифференциального эволюционного алгоритма, нижний уровень решается с помощью решателя CPLEX. Результаты моделирования показывают, что предложенная модель не только эффективно взвешивает интересы интегрированной энергетической системы и агрегатора потребителей, но и достигает беспроигрышной ситуации как для агрегатора потребителей, так и для внешней сети, а используемый алгоритм решения защищает конфиденциальность данных между интегрированной энергетической системой и агрегатором потребителей.
Design of a Heat Exchanger - a Heat Energy Accumulator With an Oscillating Coil for Heating Hot Water With a Capacity of 25 kW
Authors: Chen X. , Golyanin A. 
Published: August 2022

The subject of the research is designing a regenerative heat exchanger to heat hot water. Qualitative and quantitative analysis of relevant physical parameters to optimize heat exchanger models. The purpose of this study is to simulate realizing the goal of heating hot water with 25 kW and optimize the model to optimize the heat exchange efficiency in practical work. As a result of the research, Amplitude-frequency response of the circuit increases linearly as speed of rotation. When the speed is constant, the less of water mass is, the value of Amplitude great. The phase frequency response of the circuit increases overall as the speed increases. The greater the mass, the greater, and the rate of increase gradually decreases. we know that increasing the water volume can improve the heat transfer efficiency, but when the water volume (G) increases to 1.6, the rate of increasing the heat transfer efficiency begins to decline, so this should be taken into account in the design process. With the heating time increases, the heat transfer efficiency will also improve. It should be noted that when the heating time increases, the rate of increase of heat transfer efficiency decreases and specific heat capacity (KF) decreases.
Предметом исследования является проектирование рекуперативного теплообменника для нагрева горячей воды. Проведен качественный и количественный анализ соответствующих физических параметров для оптимизации моделей теплообменников. Целью исследования является моделирование нагрева горячей воды и оптимизация эффективности модели теплообмена мощностью 25 кВт в практической работе. В результате исследования установлено, что амплитудно-частотная характеристика контура линейно возрастает с увеличением скорости вращения. Когда скорость постоянна, чем меньше масса воды, тем больше значение амплитуды. Фазочастотная характеристика схемы увеличивается в целом по мере увеличения скорости. Увеличение объема воды может улучшить эффективность теплопередачи, но, когда объем воды (G) увеличивается до 1,6, скорость увеличения эффективности теплопередачи начинает снижаться, поэтому следует учитывать это в процессе проектирования. С увеличением времени нагрева эффективность теплопередачи также будет улучшаться. Следует отметить, что при увеличении времени нагрева снижается скорость повышения эффективности теплообмена и снижается удельная теплоемкость (КФ).
Design of a Liquid Cooler for a 100 kW Semiconductor Power Converter
Authors: Zhang R. , Golyanin A. 
Published: August 2022

He focus of this research in this paper is to design a 100 kW power liquid cooler, semiconductor converter liquid cooler, thus using pulsed thermal medium circulation to increase the capacity of the cooling system on the surface of the power semiconductor device. Based on comparing the parameters of conventional and pulsed coolant circulation mode, the liquid cooling system of power semiconductor converter is studied by physical method. In laboratory testing, experiments are planned according to the order and frequency of changing device operating modes. Finally, the experimental research results are processed, and the relationship between the discharge heat power and the temperature drop and the coolant flow is established by using the mathematical statistics method. Result: Depending on the exhaust heat power and the coolant flow in the range of 3-1.5 L/min, the pulsating heat transfer enhancement in the liquid cooling system of the power semiconductor converter can increase the thermal capacity and the current load of the power semiconductor converter by a factor of almost 2.5 times, respectively. At the same time, the circulation of the coolant in the inner circuit is carried out by a hydraulic powered film pump.
Основное внимание в исследовании уделяется разработке жидкостного охладителя полупроводникового преобразователя, мощностью 100 кВт, с использованием импульсной циркуляции теплоносителя для увеличения мощности системы охлаждения на поверхности силового полупроводникового устройства. На основе сравнения параметров обычного и импульсного режимов циркуляции теплоносителя физическим методом исследована жидкостная система охлаждения силового полупроводникового преобразователя. При лабораторных испытаниях эксперименты планировались по порядку и частоте смены режимов работы прибора. Наконец, результаты экспериментальных исследований обрабатывались, и методом математической статистики устанавливалась связь между тепловой мощностью разряда, падением температуры и расходом теплоносителя. Результат: в зависимости от мощности выхлопа и расхода теплоносителя в диапазоне 3-1,5 л/мин пульсирующее усиление теплообмена в системе жидкостного охлаждения силового полупроводникового преобразователя может увеличить тепловую мощность и токовую нагрузку силового агрегата полупроводникового преобразователя почти в 2,5 раза. При этом циркуляция теплоносителя во внутреннем контуре осуществляется пленочным насосом с гидравлическим приводом.
Operation Optimization Strategy of Multi-microgrids Energy Sharing Based on Asymmetric Nash Bargaining
Authors: Kang Ch. , Zhang Z. , Kudashev S. , Liu M. , Zhang Q. , Pan J. 
Published: August 2022

The accommodation of renewable energy is driving the development of energy storage technology, and shared energy storage has gained widespread attention because of its decentralized nature. In the optimal scheduling of shared energy storage, the problem of benefit distribution among multiple subjects is faced, so a shared energy storage plant operation optimization method based on Nash bargaining theory is proposed. The article constructs a joint model of shared energy storage plants and industrial users, establishes the cooperative operation model of each operator based on Nash bargaining theory, equates this nonconvex nonlinear problem into two subproblems of system revenue maximization and power transaction payment bargaining according to the mean value inequality, and uses the alternating direction multiplier method to solve them in a distributed manner. The algorithm selects three typical industrial users to participate in the joint system of shared energy storage, and through comparative analysis before and after cooperative bargaining, it is concluded that the proposed optimization method can effectively improve the benefits of each subject, while promoting the accommodation of new energy.
Размещение возобновляемых источников энергии стимулирует развитие технологий хранения энергии, а совместное хранение энергии получило широкое распространение благодаря своей децентрализованной природе. При оптимальном планировании совместного использования накопителей энергии возникает проблема распределения выгоды между несколькими субъектами, поэтому предлагается метод оптимизации работы установки совместного хранения энергии, основанный на теории сделки Нэша. Построена совместная модель общих станций хранения энергии и промышленных пользователей, определена модель совместной работы каждого оператора на основе теории сделки Нэша, эта невыпуклая нелинейная задача разделена на две подзадачи: максимизации дохода системы и согласования оплаты за транзакцию электроэнергии в соответствии с неравенством среднего значения, и для их решения распределенным способом используется метод множителей переменного направления. Алгоритм выбирает трех типичных промышленных пользователей для участия в совместной системе хранения энергии, и путем сравнительного анализа до и после совместных переговоров делается вывод, что предложенный метод оптимизации может эффективно улучшить выгоды каждого субъекта, одновременно способствуя размещению новой энергии.
Impact of Uzbekistan’s Development Strategy 2017-2021 on Central Asian Economic Integration
Authors: Jumaev E. , Bakirtas T. 
Published: August 2022

This article explores the economical processes that determine the sustainable development of the state and society are directly related to the internal and external factors of the Central Asian countries. In this sense, the Uzbek society over the past five years has been oriented towards effective and comprehensive cooperation with the countries of Central Asia in the development of regional issues, the development of good neighbourly relations, the recognition of common values and interests in one place - a common goal. Regional integration of the Central Asia requires deep understanding national interests and common aims of countries in this region.
В данной статье исследуются экономические процессы, определяющие устойчивое развитие государства и общества, напрямую связанные с внутренними и внешними факторами стран Центральной Азии. В этом смысле узбекское общество на протяжении последних пяти лет ориентировано на эффективное и всестороннее сотрудничество со странами Центральной Азии в решении региональных вопросов, развитие добрососедских отношений, признание общих ценностей и интересов в одном месте. Региональная интеграция Центральной Азии требует глубокого понимания национальных интересов и общих целей стран этого региона.
karatê na Educação em tempo integral: diálogos com a pedagogia Pós-crítica
Authors: Potulski Alexsandra Aline , Jacondino Eduardo Nunes 
Published: August 2022

O presente artigo traz reflexões sobre a prática da arte marcial karatê na educação em tempo integral, interligando aspectos relacionados à pedagogia pós-crítica, influenciada pelo pós-estruturalismo. O objetivo do trabalho é, portanto, conceituar os três temas abordados: karatê, educação em tempo integral e pedagogia pós-crítica. A metodologia adotada é o pós-estruturalismo. O questionamento a ser aclarado durante o trabalho é: de que modo a educação em tempo integral, por meio da prática do karatê, compreende um olhar sobre o cuidado de si do sujeito educacional a ser lida pela pedagogia pós-crítica? Trata-se de uma pesquisa bibliográfica efetuada por meio de referencial teórico.
Spatial clustering of waste reuse in a circular economy: A spatial autocorrelation analysis on locations of waste reuse in the Netherlands using global and local Moran’s I
Authors: Tsui Tanya , Derumigny Alexis , Peck David , van Timmeren Arjan , Wandl Alexander 
Published: August 2022

In recent years, implementing a circular economy in cities has been considered by policy makers as a potential solution for achieving sustainability. Existing literature on circular cities is mainly focused on two perspectives: urban governance and urban metabolism. Both these perspectives, to some extent, miss an understanding of space. A spatial perspective is important because circular activities, such as the recycling, reuse, or storage of materials, require space and have a location. It is therefore useful to understand where circular activities are located, and how they are affected by their location and surrounding geography. This study therefore aims to understand the existing state of waste reuse activities in the Netherlands from a spatial perspective, by analyzing the degree, scale, and locations of spatial clusters of waste reuse. This was done by measuring the spatial autocorrelation of waste reuse locations using global and local Moran’s I, with waste reuse data from the national waste registry of the Netherlands. The analysis was done for 10 material types: minerals, plastic, wood and paper, fertilizer, food, machinery and electronics, metal, mixed construction materials, glass, and textile. It was found that all materials except for glass and textiles formed spatial clusters. By varying the grid cell sizes used for data aggregation, it was found that different materials had different “best fit” cell sizes where spatial clustering was the strongest. The best fit cell size is ∼7 km for materials associated with construction and agricultural industries, and ∼20–25 km for plastic and metals.The best fit cell sizes indicate the average distance of companies from each other within clusters, and suggest a suitable spatial resolution at which the material can be understood. Hotspot maps were also produced for each material to show where reuse activities are most spatially concentrated.
Influence of carrier effect on Pd/Al2O3 for methane complete catalytic oxidation
Authors: Peng Shengpan , Ma Ziran , Ma Jing , Wang Hongyan , Chen Jingyun , Wei Hui , Li Yonglong , Ao Zhimin , Wang Baodong 
Published: August 2022

Pd/Al2O3 catalysts modified by different chemical elements (Mg, Si, Ce, and Zr) were tested for methane (CH4) catalytic combustion, and PdO nanoparticles loaded on modified Al2O3 were systematically studied. These conditions assess the carrier effects of Pd/Al2O3 and acid strength influences on CH4 combustion. We observed carrier effects on activation energy through tuning Pd 3d binding energies (BEs) and on pre-exponential factors (A) through Pd dispersion and acidity on supports. When the BE of Pd 3d5/2 is 337.3 eV, PdO nanoparticles loaded on modified Al2O3 have excellent activity in cracking the C−H bond of CH4, which leads to the lowest activation energy (Ea), regardless of the size effect of the PdO nanoparticle. Furthermore, a theoretical construction that acid sites on catalysts promote the reversible elementary step (2Pd−OH ↔ Pd−O* + Pd* + H2O) right shifts improving the A dependency on the quantity of exposed Pd* and Pd−O*. As a result, Al2O3, as the carrier, not only modifies the electronic characteristics and size of supported PdO nanoparticles but also participates in the reaction process via acid sites on the surface of Al2O3.
Safety and Efficacy of Contemporary Drug-Eluting Stents in Patients With ST-Segment Elevation Myocardial Infarction and a High Ischemic Risk
Authors: Lee Oh-Hyun , Kim Yongcheol , Son Nak-Hoon , Cho Deok-Kyu , Kim Jung-Sun , Kim Byeong-Keuk , Choi Donghoon , Hong Myeong-Ki , Jeong Myung Ho , Jang Yangsoo 
Published: August 2022

BackgroundIn patients with ST-elevation myocardial infarction (STEMI) with a high risk of ischemic events, the safety and efficacy of drug-eluting stent (DES) are unclear.MethodsBased on the nationwide, multicenter, prospective registry, we selected 1,592 patients who underwent primary percutaneous coronary intervention (PCI) with everolimus-(EES) and zotarolimus-eluting stent (ZES) for STEMI with a high risk of an ischemic event. The occurrence of target lesion failure (TLF) for 3 years, defined as the composite of cardiac death, target vessel myocardial infarction (TV-MI), and ischemia-driven target lesion revascularization (ID-TLR), was evaluated.ResultsThe prevalence of high ischemic risk features was observed in 43.4% (2,744/6,325) of overall patients with STEMI. Among them, a total of 1,078 and 514 patients were treated with EES and ZES, respectively. At 3 years, the risk of TLF was not significantly different between the two groups (p = 0.93). In addition, the incidence of cardiac death, TV-MI, ID-TLR, and definite/probable stent thrombosis (ST) were also not different between the two groups. Moreover, elderly patients (age &gt; 75 years) and PCI for the left main disease were identified as independent predictors of TLF.ConclusionImplantation of EES or ZES provided comparable clinical outcomes in STEMI patients and high ischemic risks.
Cardiac resynchronization therapy in heart failure patients by using left bundle branch pacing
Authors: Gu Ying , Li Yanming , Zhu Ying , Lin Xiuyu , Tian Tian , Zhang Qigao , Gong Jianbin , Wang Lei , Li Jianhua 
Published: August 2022

BackgroundLeft bundle branch pacing (LBBP) is emerging as an effective alternative to achieve cardiac resynchronization therapy (CRT) and improve heart function. The purpose of our study was to investigate the feasibility and efficacy of LBBP in heart failure patients with left ventricular ejection fraction (LVEF) &lt;50% and left bundle branch block (LBBB).MethodsAll patients with complete LBBB and LVEF &lt;50% were retrospectively included in the study from April 2018 to April 2021 and underwent CRT via LBBP implantation. ECG, pacing parameters, the New York Heart Association (NYHA) functional class, echocardiographic measurements, and complications were recorded and analyzed at implant and during follow-up of 1, 6, and 12 months.ResultsLeft bundle branch pacing was successful in all 34 patients (mean age 65.6 ± 11.2 years, 67.6% men). A significant decrease in QRS duration (QRSd) was observed after the LBBP operation for 1 month (153.2 ± 1.7 vs. 111.9 ± 2.6 ms, p &lt; 0.01). LBB capture threshold and R-wave amplitude remained stable at 12-month follow-up when compared with implantation values (0.62 ± 0.13 V @ 0.4 ms vs. 0.73 ± 0.21 V @ 0.4 ms, 12.02 ± 5.68 mV vs. 8.58 ± 4.09 mV, respectively). LVEF increased significantly (35.28 ± 1.70% vs. 51.09 ± 1.71%, p &lt; 0.01) accompanied with reduced left ventricular end-diastolic dimension (LVEDd; 65.3 ± 1.99 vs. 53.58 ± 2.07 mm, p &lt; 0.01) and left atrial dimension (LAD; 49.03 ± 1.32 vs. 40.67 ± 1.58 mm, p &lt; 0.01). Normalized LVEF (LVEF ≥ 50%) was found in 70.5% of patients at 12 months. The NYHA classification, brain natriuretic peptide (BNP), and 6-minute walk test (6MWT) were significantly improved at follow-up of 12 months (all p &lt; 0.01 vs. baseline). No deaths or heart failure hospitalizations were observed during the follow-up period.ConclusionThe current work suggested that LBBP was feasible with a high success implantation rate and effective to correct LBBB and improved left ventricular structure and function with a low and stable pacing threshold.
A prognostic exosome-related LncRNA risk model correlates with the immune microenvironment in liver cancer
Authors: Su Duntao , Zhang Zeyu , Xu Zhijie , Xia Fada , Yan Yuanliang 
Published: August 2022

Background: Emerging studies have shown the important roles of long noncoding RNAs (lncRNAs) in the occurrence and development of liver cancer. However, the exosome-related lncRNA signature in liver cancer remains to be clarified.Methods: We obtained 371 tumor specimens and 50 normal tissues from the TCGA database. These samples were randomly divided into the training queue and verification queue. The exosome-related lncRNA risk model was verified by correlation analysis, Lasso regression analysis, and Cox regression analysis. The differences in the immune microenvironment in the two risk groups were obtained by analyzing the infiltration of different immune cells.Results: Five exosome-related lncRNAs associated (MKLN1-AS, TMCC1-AS1, AL031985.3, LINC01138, AC099850.3) with a poor prognosis were identified and used to construct the signature. Receiver operating curve (ROC) and survival curves were used to confirm the predictive ability of this signature. Based on multivariate regression analysis in the training cohort (HR: 3.033, 95% CI: 1.762–5.220) and validation cohort (HR: 1.998, 95% CI: 1.065–3.751), the risk score was found to be an independent risk factor for patient prognosis. Subsequently, a nomogram was constructed to predict the 1-, 3-, 5-years survival rates of liver cancer patients. Moreover, this signature was also related to overexpressed immune checkpoints (PD-1, B7-H3, VSIR, PD-L1, LAG3, TIGIT and CTLA4).Conclusion: Our study showed that exosome-related lncRNAs and the corresponding nomogram could be used as a better index to predict the outcome and immune regulation of liver cancer patients. This signature might provide a new idea for the immunotherapy of liver cancer in the future.
The striking mimics between COVID-19 and malaria: A review
Authors: Konozy Emadeldin Hassan E. , Osman Makarim El-fadil M. , Ghartey-Kwansah George , Abushama Hind Mohamed 
Published: August 2022

ObjectivesCOVID-19 is a transmissible illness triggered by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Since its onset in late 2019 in Wuhan city of China, it continues to spread universally, leading to an ongoing pandemic that shattered all efforts to restrain it. On the other hand, in Africa, the COVID-19 infection may be influenced by malaria coinfection. Hence, in this review article, we aimed to give a comprehensive account of the similarities between COVID-19 and malaria in terms of symptoms, clinical, immunological, and molecular perspectives.MethodologyIn this article, we reviewed over 50 research papers to highlight the multilayered similarities between COVID-19 and malaria infections that might influence the ontology of COVID-19.ResultsDespite the poor health and fragile medical system of many sub-Saharan African countries, they persisted with a statistically significantly low number of COVID-19 cases. This was attributed to many factors such as the young population age, the warm weather, the lack of proper diagnosis, previous infection with malaria, the use of antimalarial drugs, etc. Additionally, population genetics appears to play a significant role in shaping the COVID-19 dynamics. This is evident as recent genomic screening analyses of the angiotensin-converting enzyme 2 (ACE2) and malaria-associated-variants identified 6 candidate genes that might play a role in malaria and COVID-19 incidence and severity. Moreover, the clinical and pathological resemblances between the two diseases have made considerable confusion in the diagnosis and thereafter curb the disease in Africa. Therefore, possible similarities between the diseases in regards to the clinical, pathological, immunological, and genetical ascription were discussed.ConclusionUnderstanding the dynamics of COVID-19 infection in Sub-Saharan Africa and how it is shaped by another endemic disease like malaria can provide insights into how to tailor a successful diagnostic, intervention, and control plans that lower both disease morbidity and mortality.