bluuebunny/crossref_metadata_2025 huggingface dataset:
Enhanced Water Quality Prediction in the Yellow River Basin: Application of the SSA-RBF Model
Authors: Wu Minning , Blancaflor Eric B.
Published: May 2024

Watershed water quality monitoring is of great significance in water environment protection and management, and this paper proposes a water quality prediction model based on RBF neural network. Aiming at the parameter optimisation of RBF water quality prediction model, we propose to apply the sparrow search algorithm to optimise the parameters of the RBF model, aiming to improve the global search ability and convergence speed of the model. The characteristics of water quality parameters in the Shaanxi section of the Yellow River Basin were analysed using the model. Comparison with the RBF prediction algorithm is made, and the SSA-RBF prediction algorithm can significantly improve the prediction performance of the RBF model.
Research on current situation of farmland runoff pollution and ecological treatment technology
Authors: Tao Zhihang , Liu Guangbin
Published: May 2024

Farmland runoff pollution, caused by excessive use of fertilizers and pesticides, poses serious threats to water quality and aquatic ecosystems. To address this issue, various ecological treatment technologies have been developed and applied, such as vegetated ditches, constructed wetlands, and bioaugmentation techniques. These systems aim to reduce nutrient and pesticide concentrations in runoff water and enhance soil quality and biodiversity. This study reviews the current state of farmland runoff pollution and the existing ecological treatment methods. It also presents the results of our comparative analysis of the performance and efficiency of different treatment systems across multiple study sites with diverse climatic conditions. We demonstrate that ecological treatment technologies can effectively remove pollutants from runoff water and improve soil properties and microbial activity. We also discuss the implications and challenges of applying these technologies for agricultural sustainability and environmental protection.
Convolutional neural network for predicting the TOC content of source rocks in the Shahejie Formation, Liaohe Western Depression
Authors: Zhai Ting , Zhang Jiaqi , Sun Xinyu
Published: May 2024

The total organic carbon (TOC) content is an important index to evaluate the quality of hydrocarbon source rocks. It is proposed that accurate and effective prediction methods of TOC content are beneficial to the progress of conventional and unconventional oil and gas exploration research. The Liaohe western depression is rich in oil and gas resources. Among them, the Shahejie Formation Section 4 is the main oil-generating layer, and a comprehensive and accurate evaluation of its organic matter content can provide ideas for shale oil exploration in this area. Based on this, this article proposes three methods for quantitative prediction of TOC content in the Shahejie Formation Section 4 in the Liaohe western depression: simple linear regression, ΔLogR, and convolutional neural network (CNN) simulation, which has different correlation coefficients of 0.3, 0.55, and 0.88. Compared with the laboratory sample analysis and testing results, the prediction results of the three methods show that the CNN simulation method is more reliable and accurate for predicting TOC content. Therefore, this method is more suitable for evaluating hydrocarbon source rocks in the Liaohe western depression and has great potential for application in the evaluation of hydrocarbon resources in the future.
Research on Horizontal Directional Drilling Scheme for Large Cross Section Submarine Cable Crossing Hard Rock
Authors: Wu Fenqian , Huang Xiaoyu , Qiu Haoci , Lin Shaoyuan , Chen Xiaoxiang
Published: May 2024

With the increasing number of submarine cable projects, the terrain and geological conditions of the landing section are becoming increasingly complex, and the traditional implementation of trench burial is becoming increasingly difficult. A landing construction plan for large-section power cables suitable for steep terrain and rugged rock formations is studied and proposed based on sorting out existing submarine cable landing plans. Using directional drilling construction machinery ideal for rock formations, natural cable protection pipes are formed in rock formations after dragging and expanding the holes, meeting submarine cable protection’s safety and economic requirements. In the climbing section of the submarine cable from the seabed to the rock hole, measures such as bottom sandbag raising and top rock throwing security are adopted to avoid vortex-induced vibration and erosion caused by the cable hanging in the climbing section. The construction plan of the directional drilling passage through hard rock and the construction and protection plan of the submarine cable do not affect the current situation of the existing coastal reefs and can effectively protect the submarine cable from external damage, achieving green and environmentally friendly construction.
Research on the influence of relative humidity on the purification efficiency of sponge activated carbon system purification system
Authors: Qiao Chunzhen , Zhao Ruijie , Hao Jinxin , Pan Yuyi , Tian Yuzhe , Zhao Nanyu
Published: May 2024

An indoor air purification system coupled with adsorption and heat storage was designed based on a prefabricated building, which has the advantages of high purification efficiency, does not take up indoor space and does not require additional power consumption. It has been shown that the relative humidity has a significant impact on the purification effect of particulate matter. Using sponge activated carbon as adsorption material, the effect of different relative humidity on the purification efficiency of PM2.5 and PM10 was experimentally studied, and the purification effect of the purification system on PM2.5 and PM10 under various relative humidity conditions was analyzed. The results show that in the relative humidity interval of 20%-70%, with the increase of relative humidity, the sponge activated carbon purification system shows an increasing trend in the purification efficiency of PM2.5, and the effect on the purification efficiency of PM10 is not obvious.
Study on Tritium Production and Effluent Source Term for HPR1000
Authors: Li Huaibin , Cao Chengque
Published: May 2024

During the operation of nuclear power plants, fuel fission and activation of boron and lithium in reactor coolant will produce a certain amount of tritium, which is difficult to be removed by conventional waste treatment system, and will cause certain harm to human body in the form of internal irradiation after entering the environment. In this paper, by analyzing the main sources of tritium production, the calculation model and key parameters of tritium production are evaluated, the tritium production and gas-liquid effluent source terms are obtained for HPR1000. The result shows that the activation of boron-10 in the reactor coolant is the main source of tritium production, accounting for about 66%, followed by the contribution of secondary source rods, accounting for about 30%. The gas and liquid effluents of tritium meets the requirements of GB6249-2011. The results can be used as a reference for environment impact assessment and determination of application value of tritium effluent.
Full-cycle prediction of gas production variations in gas wells using different production methods
Authors: Gao Wei , Hua Zhongzhi , Liu Yang , Liu Liping , Cheng Jiarui
Published: May 2024

Gas production from gas wells is affected by formation pressure and wellbore outflow during gas production. To increase the daily gas production and obtain smooth and efficient gas production gas wells, methods such as wellbore shut-in pressure recovery and foam injection and drainage for gas production are usually adopted. In this paper, the gas-carrying liquid model, capacity prediction model, and pressure recovery model are utilized to establish a full-cycle production prediction method for newly developed gas wells. Combining the initial development pressure, gas production, and water production parameters of the gas well, the gas production prediction is obtained for the next few years. Meanwhile, the implementation time of the forced drainage method is calculated and obtained.
Research on high-precision accounting methods for regional carbon emissions under the peak carbon target
Authors: Liu Nian , Tang Bao , Dong Zheng , Zhang Rui , Zhao Xiaofeng
Published: May 2024

In recent years, the level of digitalization and intelligence in the energy sector has profoundly changed the management mode of the energy sector. However, in the process of promoting the digital transformation of the energy sector, we also face some difficulties. One of the main manifestations is the lack of energy data sharing, and the difficulty of realizing the convergence and integration of various types of energy data. In addition, there is insufficient mastery of customer-side energy use data and a lag in the perception of customer demand, which requires the improvement and enhancement of energy efficiency diagnosis and energy saving services. At the same time, we have not yet established advanced digital technology monitoring means to grasp the user’s energy use and carbon emissions in real time. Therefore, this paper proposes the study of high-precision accounting methods for regional carbon emissions under the carbon peak goal. Based on the energy consumption and production activities of each region, a greenhouse gas emission inventory is compiled, so that carbon emissions can be accurately calculated. The high-precision accounting method of carbon emissions is analyzed, and by establishing a more complete database and model, and constructing a regional online monitoring system under the peak carbon target, we aim to improve the efficiency of data acquisition and processing, as well as how to combine carbon emission accounting with the peak carbon target, in order to provide support for the formulation of a more effective emission reduction policy. The testing experiments after flow and CO2 concentration measurements show that the accuracy of the experiments on regional carbon emissions is as high as 97.5%.
Experimental Study on Activated Sulfur Selection from High Alkalinity Lead Zinc Flotation Tailings
Authors: Gao Tengyue , Li Guangsheng , Zhu Xingfu , Ji Qiang
Published: May 2024

This article takes the flotation tailings of a high sulfur lead-zinc mine in Inner Mongolia as the research object. XRD and BPMA automatic process mineralogical analysis systems are used to analyze the mineral composition of the tailings, and experimental research is conducted on the comprehensive recovery of pyrite through activated flotation. The results showed that using concentrated sulfuric acid as an activator, ethyl xanthate and isoamyl xanthate as a combination collector, and adopting a flotation process of “one coarse, one sweep, and two fine”, a concentrate product with a yield of 9.31% and a sulfur grade of 37.78% can be obtained, and the sulfur recovery rate in the concentrate can reach 77.13%; The comprehensive recovery and utilization of sulfur in the original flotation tailings have been achieved.
The influence of methane blending ratio on the spontaneous combustion characteristics of high-pressure hydrogen leakage
Authors: Luo Zhenmin , Luo Chuanxu
Published: May 2024

Adding CH4 to high-pressure H2 is considered one of the effective and convenient measures to reduce high-pressure H2 leakage and spontaneous combustion, which is conducive to improving the safety of H2 energy storage. Based on the independently built high-pressure hydrogen leakage and self ignition experimental platform, the influence of CH4 on the critical self ignition pressure and flame of high-pressure H2 leakage and self ignition was tested. The results indicate that the addition of methane can effectively increase the critical spontaneous combustion pressure. When 20% CH4 is added, the critical self ignition pressure can be increased by 151.58%. Under similar discharge pressure conditions, the flame velocity in the pipeline decreases from 1224.64m/s for pure H2 to 1024.07m/s for 10% CH4. In addition, after mixing CH4, the dispersion time of the jet flame is advanced, the flame duration is shortened, and the flame brightness is reduced. There are two main reasons for the mixed inhibition of spontaneous combustion by CH4. On the one hand, it reduces the Mach number of shock wave propagation, thereby lowering the ignition temperature. On the other hand, the activity of the fuel system decreases, and the heat required for self ignition increases.
An Analysis of land-use Carbon Emissions in Dongguan City Under the Background of Carbon Neutrality and Peak-Carbon
Authors: Lin Jie
Published: May 2024

The “Peak-Carbon and Carbon Neutrality” targets proposed by China are formulated with a strategic consideration of coordinating both international and domestic contexts. Aligned with these goals, our study delves into Dongguan, a pivotal city in southern China, focusing on its challenges and opportunities in mitigating climate change and achieving carbon neutrality. Utilizing three periods of remote sensing image data (2002, 2012, and 2022) and applying the carbon emission coefficient method, the research specifically investigates the role of land-use types and transitions in influencing carbon emissions and emission intensity in Dongguan. Notably, the study identifies construction land-use as a significant contributor to carbon emissions, hindering the attainment of carbon neutrality and peak-carbon objectives. The findings prompt the proposal of targeted policies to address this issue and promote sustainable land-use practices, providing a more precise lens on the interplay between land use and carbon emissions in Dongguan.
Study on Carbon Emission Impacts and Carbon Emission Reduction of Land Use Changes in the Yangtze River Delta Region from 2005-2020
Authors: Qi Haoran , Yang Wanyu , Feng Xiaoxuan , Liu Xuyue
Published: May 2024

The article investigated the characteristics of land use and land cover and their effects on carbon emissions in the Yangtze River Delta region from 2005 to 2020 and predicted carbon emissions in the next ten years. The results show that the land use in the region is spatially territorial and quantitatively stable, with the area of cultivated land and forest land decreasing, the area of construction land and unused land increasing, and the area of grassland, forest land, and water not changing much; the degree of land use in the region tends to increase, and the areas with high degree are the economically developed eastern urban agglomerations, while the low degree is the western mountainous areas; The spatial variability of regional carbon emission intensity is changing, with the total amount showing an upward trend, the distribution direction converging toward coastal areas, and the spatial development direction of “northwest-southeast” expanding more intensely than “northeast-southwest”; the model predicts that carbon emissions will still be on an upward trend in the next ten years. Based on this, measures such as optimizing the land use structure and comprehensive development of woodland-grassland agglomerations are necessary to achieve carbon reduction targets.
Research progress of leachate treatment in waste transfer station
Authors: Fu Yuan , Su Dexin , Ma Sai , Xiao Yan
Published: May 2024

The garbage leachate generated by the waste transfer station has the characteristics of scattered water sources, relatively small water quantity, large fluctuations in water quality and quantity, and high concentrations of organic matter, ammonia nitrogen, suspended solids, and other pollutants. These characteristics make it prone to environmental hazards. This paper analyzes the characteristics and hazards of leachate from waste transfer stations and introduces the current research status of physico-chemical, biological, and combined treatment of leachate from waste transfer stations. Meanwhile, this paper introduces engineering practices for leachate treatment in waste transfer stations, offering a valuable reference for research and engineering practices in this field. Finally, this review discusses pretreatment, economic, low-carbon, and high-efficiency treatment methods and facilities, the recovery of valuable elements, energy recycling technologies, and the demand outlook for high-standard deep treatment processes.
Analysis on application status of CCUS technology in emission reduction of modern coal chemical project in chemical industry
Authors: Zhan Yu
Published: May 2024

To gain a deeper understanding of the current application status of carbon capture, utilization, and storage (CCUS) technology in modern coal chemical projects aimed at reducing emissions in the chemical industry, a study on the application of CCUS technology in emission reduction in the chemical industry was proposed. This article provides a detailed summary of the application status of CCUS technology in the global chemical industry, comprehensively sorts out its technical classification and characteristics, and deeply analyzes the carbon emission characteristics of modern coal chemical industry. On this basis, a comprehensive analysis was conducted on the main technical, economic, and policy issues faced by the modern coal chemical industry in promoting the application of CCUS technology. Through the analysis and research of these issues, some suggestions have been made, including strengthening top-level planning, focusing on solving CCUS technology challenges, enhancing policy support, etc., to promote better progress in the modern coal chemical industry in carbon capture technology engineering demonstration and low-carbon development.
Evaluation and Comparison of Research Methods on Driving Factors of Carbon Emission in Industrial Parks
Authors: Ma Ruiguang , Liu Shixu , Hu Can , Wu Gang , Ma Tiannan , Wang Ziyun , Dong Daoze
Published: May 2024

As the primary territories of regional carbon emission and energy consumption, most industrial parks only simply stack technology and policy under the urgent goal of emission reduction and carbon reduction. As a result, certain measures may even have negative impacts. As the primary means to determine the characteristics of carbon emissions in industrial parks, studying the driving factors of carbon emissions and proposing targeted measures can effectively achieve the carbon emission reduction goals. However the mechanism analysis of driving factors of carbon emission in industrial parks is the important means to study the characteristics of carbon emission. The selection of driving factors is many and complicated, and the selection of mechanism analysis methods is different, so it is difficult to have a comparison of research results Based on the quantitative relationship model between carbon emissions and driving factors and the method of action mechanism analysis in industrial parks, this paper evaluates and compares the relevant studies, summarizes their advantages and disadvantages, and makes relevant comments and prospects. For providing reference for the practice of driving factors of carbon emission in industrial parks, and put forward the basis for the research of carbon emission prediction.
Critical applications of scandium and progress in the extraction of different scandium resources
Authors: Su Wenrou , Tan Xiaolin , Wang Zhanzhao
Published: May 2024

Scandium can used in unique electronic or alloying materials such as aluminum-scandium alloys, magnesia-scandium alloys, laser glasses, superconductors and electronic components. However, there is no single scandium mine in the world. Scandium is usually associated with other minerals and is found in very low amounts. Therefore, it is very difficult to obtain scandium and it is of great significance to explore the appropriate extraction process for the production of scandium. This paper highlights key applications of scandium, resource characterization, and production advances with less polluting. It provides environmentally friendly methods for improve scandium product recovery, and optimize the existing process.
Design Capability Evaluation and System Development for Power Transmission and Transformation Engineering
Authors: Yang Jiarui , Bian Rong , Wang Tingting , Huang Jiangqian , Wang Shuhong
Published: May 2024

Power transmission and transformation engineering is a pivotal aspect of power grid construction and an important link to power grid planning. It holds substantial relevance to the economic to the economic, social, and environmental benefits of China’s power construction. Consequently, the design of power transmission and transformation engineering, as the source of power transmission and transformation project construction, holds notable importance. In this paper, the evaluation system of design capability for power transmission and transformation engineering was established from the dimensions of basic hard strength, design bearing capacity, result quality control, deviation control, and technological innovation capacity. The weight of the evaluation indicators of the design capacity of power transmission and transformation engineering is determined based on advanced design units and data analysis combined with expert experience. On this basis, the corresponding evaluation system of design capability was developed. The application of this system provided accurate basic data for the evaluation of design capabilities in power transmission and transformation engineering. The design capability assessment report issued can help provincial companies comprehensively evaluate the design capabilities of various design units, thereby promoting standardized management of design units.
Optimization and Simulation Analysis of Furnace Structure for Regenerative Thermal Oxidizer
Authors: Niu Yaoyu , Zhang Yan , Shi Zhicheng , Chi Guanghui , Yu Xiaodong , Zhu Tan
Published: May 2024

Volatile Organic Compounds (VOCs) significantly threaten the atmospheric environment. Currently, common methods for the recovery and treatment of VOCs include adsorption, solution absorption, photocatalytic oxidation, and high-temperature oxidation. Among them, the Regenerative Thermal Oxidizer (RTO) is a scheme for high-temperature oxidation treatment of VOCs, which applies aerospace heat transfer and combustion technology to the treatment of VOCs, and the removal efficiency of VOCs can reach over 99%. Considering the high temperature and possible instantaneous overpressure during the combustion process, a three-dimensional flow model of the bottom air distribution chamber and heat storage chamber was established to solve the technical difficulties of the gas flow field in the existing RTO and improve the safety and stability of the overall flow. Simulated the gas flow field and analysed the distribution pattern of the gas flow rate. In response to the uneven distribution of airflow caused by the pipeline layout, orifice plates were installed at the bottom of the furnace, and various orifice plate designs were considered. The results indicate that adding slanted orifice plates can improve flow conditions and enhance safety while meeting practical needs.
Applications of ZnSe quantum dots for solar energy harvesting
Authors: Li Xingyu
Published: May 2024

To reduce the large usage of fossil fuels, scholars have made great efforts to develop green energy such as wind energy, biomass energy, and solar energy. Solar energy has special benefits, thus solar energy harvesting technologies including solar cells, luminescent solar concentrators, photocatalysis have been studied widely. It is meaningful to study the working principle of those technologies. For the special properties of ZnSe, different kinds of nanostructure of it have been used for solar energy harvesting. Among them, since quantum qot structure has some specific characters, the application of it for solar energy harvesting are worthwhile to mention. This study aims to introduce solar cells, luminescent solar concentrators, photocatalysis technologies and the applications of ZnSe quantum dots for them. It found that ZnSe quantum dots enhanced the behavior of Si nanowire solar cells. Besides, the outstanding performance of luminescent solar concentrators based on InP/ZnSe quantum dots is partly own to ZnSe shell structure. Moreover, some quantum dots including ZnSe shell structure behave good photocatalytic H2 evolution performances. At the same time, the nanostructures of the quantum dots mentioned are shown.
Formula system of reduce pressure and increase injection working fluid in Tamtsag oilfield
Authors: Li Jinfu
Published: May 2024

Tamtsag Oilfield is a low-permeability oilfield. In the actual production process, there will be “high water injection pressure and high injection difficulty”. In order to improve the waterflood development effect of low permeability reservoir, the selection of working fluid plays a key role. By measuring the interfacial tension between the working fluid and crude oil, combined with the depressurization and injection performance evaluation test, the anion-non-ionic surfactant working fluid system suitable for the characteristics of the Tamtsag reservoir was prepared. Under the condition that the formation water pH of oil formation in the Block 21 of Tamtsag oilfield is 7.5 and the salinity is 3000 mg/L, the injection increasing formula selected in this paper is: 0.9 % coconut oil diethanolamide+0.7 % sodium dodecylbenzene sulfonate+0.5 % anhydrous ethanol+3 % clay stabilizer. For cores with permeability lower than 80 mD, the depressurization rate can reach more than 25 %; For cores with permeability less than 15.9 mD, the depressurization rate can reach more than 30 %. The working fluid system can effectively improve the effect of increasing injection in Tamtsag Oilfield.
Does environmental protection tax law accelerate energy transition? Evidence from electrification of 262 cities in China
Authors: Wang Yunming , Chen Wenzhe , Hu Zuhui , Yang Shiyu , Zhao Lunan , Liu Jinwei , Chen Bin
Published: May 2024

While global climate risk is increasing substantially with greenhouse gas emission, energy transition is a key approach to alleviate this concern. This paper constructs the difference in difference model (DID) and the difference-in-differences based propensity score matching model (PSM-DID) to estimate the effects of China’s Environmental Protection Tax Law on energy transition and its transmission path. The empirical results show that (1) China’s Environmental Protection Tax Law can promote energy transition through electrification, and this conclusion is still valid after a series of robustness tests. (2) China’s Environmental Protection Tax Law can facilitate energy transition by improving both the quantity and the quality of industrial structure upgrading. The findings of this paper not only enrich the literature on the energy transition and environmental tax designs in developing countries but also provide an empirical reference for the government to promote energy transition orderly by implementing environmental tax.
Adjusting energy polices based on the Energy Trilemma Index
Authors: Wu Shuai
Published: May 2024

In response to the imperative of climate change, global governments are steering energy systems towards sustainability. However, this transition encounters challenges from climate, geopolitical, and economic factors. Decision-makers must craft adaptive policies to address these complexities. This study proposes a method, utilizing the Energy Trilemma Index, to adjust energy goals and policies. Drawing on World Energy Council data spanning 2000 to 2022 for 124 countries, the Analytic Hierarchy Process refines policies at strategic, indicator, and operational levels. Using China as a case study, the study recommends that decision-makers prioritize environmental investment, equitable resource distribution, and strengthened energy security.
Granularity Optimization for Efficient Energy Consumption Monitoring in Subway Stations for Enhanced Energy Management
Authors: Guan Bowen , Yang Haobo , Liu Yanbin , Gao Huan , Wang Xinke
Published: May 2024

Efficient energy data management forms a critical foundation for unlocking the carbon reduction potential of subway systems, holding significant importance in advancing urban processes towards lowcarbon and clean environments. Low-precision sampling is difficult to reflect the actual energy consumption of the station, and high-precision sampling has high requirements for the data storage and transmission capacity of the monitoring system. In order to determine the appropriate sampling accuracy, this study analyses the power load fluctuation characteristics of stations on a subway line in the North China Plain and optimizes the sampling granularity for achieving minimal data storage requirements while effectively capturing energy consumption fluctuation information. The findings indicate that a higher sampling granularity for power load monitoring is advisable during the summer to capture the frequent fluctuation characteristics of ventilation and air-conditioning system energy consumption. For a typical underground station, it is recommended to use a sampling interval of 5 min in summer and 15 min or longer in other seasons. For a typical elevated station, a sampling interval of 10 min is recommended in summer, and 20 min or longer in other seasons.
Elevating Extreme Weather Forecasting Precision Through the NEMY Generation Framework
Authors: Yan Yi
Published: May 2024

This paper presents an innovative methodology known as New Extreme Meteorological Years (NEMY) for comprehensively understanding extreme weather patterns. In contrast to conventional approaches, NEMY meticulously accounts for meteorological parameters, their respective weights, and explores critical factors such as intensity, duration, and the establishment of dynamic thresholds. This dynamic and adaptable framework facilitates precise simulations of extreme weather conditions. In an era characterized by climate change, where preparedness and mitigation of extreme weather impacts are imperative, this research holds paramount significance. The heart of this study revolves around the development and examination of the NEMY framework, which significantly enhances the accuracy in simulating extreme weather scenarios. It is worth emphasizing that, within the context of this paper, the consideration of both the intensity and duration of extreme weather events, as well as the meticulous discussion on the establishment of dynamic thresholds, are central to our approach. The importance of this framework extends beyond meteorology, with practical implications for assessing wind and solar energy resources. This paper not only outlines the methodology of NEMY but also vividly discusses the critical aspects of accounting for the intensity and duration of extreme weather events, as well as the nuanced process of dynamically setting thresholds. Furthermore, it demonstrates the application of NEMY in energy assessment, thereby contributing significantly to the global energy revolution. Additionally, it underscores the urgency of climate change adaptation and mitigation. The subsequent sections delve deeper into the NEMY framework’s design, testing, and potential applications, with a particular focus on the intricate considerations of extreme weather event intensity, duration, and dynamic threshold establishment.
Based on the Carbon Emission Accounting System: Low-Carbon Electricity Intelligent Management Technology
Authors: Si Jianan , Li Hujun , Deng Fangzhao , Liu Fang , Deng Zhenli
Published: May 2024

This paper discusses the possibility of combining low-carbon intelligent power management technology with carbon emission accounting systems in the context of the pressing global climate change. The article emphasizes the crucial role of these technologies in promoting sustainable power system development. It introduces the basic principles of carbon emission accounting and its application in the electricity industry, highlighting how the integration of intelligent power management with emission accounting can help reduce carbon emissions. Furthermore, the paper provides insights into algorithm development and real case studies, demonstrating the effectiveness of these methods. In summary, this integrated approach supports a cleaner, more sustainable energy future.
Research on Evaluation Method of Temporary Road Scheme in Mechanized Construction of Transmission Line
Authors: Zhu Xuemei , Ye Minquan , Feng Jiayao , Ke Ye , Wang Ying , Chen Chen
Published: May 2024

During the construction of overhead transmission lines, it is difficult for construction equipment to arrival the site, and it is difficult to evaluate the optimal approach comprehensively. In this paper, the evaluation of construction temporary road schemes is built, and a multi-dimensional evaluation index system covering the indicators such as technical factors, economy, environment, safety is constructed. The weight of each evaluation index is determined by analytic hierarchy process (AHP), and the comprehensive score of the scheme is obtained, so as to realize the comprehensive ranking of the approach scheme, which can help make decisions of the optimal approach scheme.
Energy Consumption Characteristics Study of Surface Meteorological Observation Station in North and South China
Authors: Cao Yujing , Sun Zhaobin , Zheng Qi , Zhu Chuanhai , Liao Rongwei
Published: May 2024

Surface meteorological observation is one of the most important sources of primary data for the meteorological sector and are crucial to the accuracy of weather forecasting. China’s meteorological authorities have built a dense network of surface observation stations, which require a considerable amount of electrical energy to keep the network running normally. There has been a lack of analytical studies dedicated to the energy consumption of surface meteorological observation stations domestically and internationally. This paper selects measured energy consumption data of 4 surface meteorological observation stations in two typical provinces (autonomous regions) in the north and south China over the past two years, and proposes, for the first time, to use the average power of the surface meteorological observation station, adopts the electrical energy consumption calculation method, carries out energy consumption calculation and analysis by month, sub-region and season, derives the characteristics of energy consumption changes of the surface meteorological observation station, and proposes energy saving and consumption reduction measures.
Error estimates for a mixed finite element method for the Maxwell’s transmission eigenvalue problem
Authors: Wang Chao , Cui Jintao , Sun Jiguang
Published: May 2024

In this paper, we analyze a numerical method combining the Ciarlet-Raviart mixed finite element formulation and an iterative algorithm for the Maxwell’s transmission eigenvalue problem. The eigenvalue problem is first written as a nonlinear quad-curl eigenvalue problem. Then the real transmission eigenvalues are proved to be the roots of a non-linear function. They are the generalized eigenvalues of a related linear self-adjoint quad-curl eigenvalue problem. These generalized eigenvalues are computed by a mixed finite element method. We derive the error estimates using the spectral approximation of compact operators, the theory of mixed finite element method for quad-curl problems, and the derivatives of eigenvalues.
Trends im Substanzkonsum
Authors: Moesgen Diana
Published: May 2024

Liebe Leserinnen und Leser

haben Sie den gleichen Eindruck? Trends im Substanzkonsum scheinen nicht nur für
Fachkräfte aus der Suchthilfe interessant zu sein, sondern auch für die breite
Öffentlichkeit, die sich regelmäßig an Filmen und Serien erfreut, die einschlägige
Bewegungen im Substanzgebrauch aufgreifen. Als ein Beispiel ist die Dramaserie
„Painkiller“ auf Netflix zu nennen, die den Ursprung und die Folgen der Opioid-Krise
in den Vereinigten Staaten aus der Sicht von Betroffenen und Verantwortlichen
erläutert. Konsum von verschreibungspflichtigen Opioiden in den USA, ein neuer Trend
im Substanzkonsum? Wohl kaum. Vor mehr als zwanzig Jahren war er ein neuer Trend,
der dann zu einer persistierenden Herausforderung für das dortige Versorgungssystem
geworden ist. Und hierzulande? In den letzten Monaten häuft sich die mediale
Berichterstattung zum Thema Crack. Die Droge scheint sich rasant auszubreiten und
stellt das hiesige Versorgungssystem vor die Aufgabe, den Betroffenen ein passendes
Behandlungsangebot zu unterbreiten.
Ösophagusstenose infolge eines persistierenden rechten Aortenbogens
bei 2 Katzen
Authors: Mackus Lena , Masche Anja , Höpfner Robert , Schmerbach Kay
Published: May 2024

Eine 3 Monate und eine 4 Jahre alte Katze wurden aufgrund von Regurgitieren in
der Klinik vorgestellt. Der Katzenwelpe zeigte die Symptomatik mit Beginn der
Aufnahme von festem Futter und war im Vergleich zu den Wurfgeschwistern in der
Entwicklung zurückgeblieben. Die 4-jährige Katze zeigte eine plötzliche
Symptomatik seit 5 Tagen und war bei gutem Ernährungs- und Pflegezustand. Die
röntgenologische Kontrastuntersuchung zeigte bei beiden Katzen eine Dilatation
des Ösophagus mit einer Anschoppung von weichteildichtem Material kranial der
Herzbasis. Das ventrodorsale Röntgenbild des Thorax der 4-jährigen Katze zeigte
eine Dextroposition der Aorta und eine geringgradig ausgeprägte fokale
Linkskurve der Trachea. Bei dem Katzenwelpen bestand aufgrund der
echokardiografischen Untersuchung und des hierbei sichtbaren rechtsseitigen
Verlaufes der Aorta der Verdacht auf eine Ringanomalie mit Dextroposition der
Aorta. Ein abnormer Fluss im Truncus pulmonalis im Sinne eines persistierenden
Ductus arteriosus konnte nicht dargestellt werden. Aufgrund der plötzlich
auftretenden Symptomatik der ausgewachsenen Katze, ohne vorherigen Auftretens
von Regurgitieren, wurden am Tag der Vorstellung eine Endoskopie zum Ausschluss
einer intraluminalen Verlegung des Ösophagus und eine Entleerung des Ösophagus
durchgeführt.

Die Computertomografie konnte bei dieser Katze zusätzlich eine aberrante Arteria
subclavia sinister diagnostizieren. Beide Katzen wurden erfolgreich
operiert.

Die junge Katze zeigte einen sehr guten postoperativen Verlauf. Ein halbes Jahr
nach der Operation wurde von den Besitzern kein Regurgitieren mehr beobachtet.
Die adulte Katze zeigte bei den Kontrollen bis zum Fäden ziehen ein sehr gutes
Allgemeinbefinden ohne Regurgitieren nach der Futteraufnahme. Daten über den
weiteren Verlauf liegen nicht vor.
Laryngeal and oropharyngeal adenocarcinoma with pulmonary metastases
in a common raven (Corvus corax)
Authors: Westhoff Katharina M. , Fischer Dominik , Jäger Kathrin , Trinkaus Katja , Ziegler Ute , Lierz Michael
Published: May 2024

A captive 15-year-old male common raven (Corvus corax) was presented for
post-mortem examination. It had been previously presented to a local
veterinarian due to a 3–4 weeks long history of abnormal respiratory sounds.
Upon admission, the bird demonstrated severe dyspnea and a massive amount of
mucous in the oropharynx. After symptomatic treatment, dyspnea deteriorated
dramatically, and euthanasia was elicited because of poor prognosis. The
necropsy revealed a 2.65 x 2.15 x 2.18 cm expansile and poorly delineated
cauliflower-shaped mass around the glottis and extending inside the tracheal
lumen. Additionally, a dilated salivary gland in the adjacent tissue and
multifocal reddish-fleshy areas in the lung parenchyma were detected.
Histopathological examination identified the mass as moderately differentiated,
tubular adenocarcinoma with invasive growth and moderate to marked cellular
atypia and numerous mitoses. The presumptive origin of the neoplasia was one of
the salivary glands. Multiple metastases were identified in the lung both
macroscopically and histologically. Bacterial culture and molecular testing for
West Nile and Usutu viruses were negative. To the authors’ knowledge, this is
the first report of metastatic laryngeal and oropharyngeal adenocarcinoma in a
common raven.
Risk Phenotypes, Comorbidities, Pharmacotherapy, and
Electroconvulsive Therapy (ECT) in a Cohort with Difficult-to-Treat Depression
in Comparison to an Unmedicated Control Group
Authors: Maier Hannah B. , Borchert Anton , Neyazi Alexandra , Moschny Nicole , Schülke Rasmus , Bundies Gabriel L. , Folsche Thorsten , Gaspert Anastasia , Seifert Johanna , Bleich Stefan , Scherf-Clavel Maike , Unterecker Stefan , Deckert Jürgen , Frieling Helge , Weber Heike
Published: May 2024

Background Approximately 15–25% of depressed patients suffer from
difficult-to-treat depression (DTD). Patients with DTD require a thorough
examination to avoid the oversight of treatable (psychiatric/somatic)
comorbidities or (pseudo-)resistance to antidepressant drugs (ADs).
Polymorphisms of the cytochrome P450 (CYP) enzymes 2D6 and 2C19, which play a
major role in the metabolism of ADs, may contribute to resistance to ADs.
Patients with DTD might benefit from electroconvulsive therapy (ECT).

Methods We enrolled 109 patients with DTD and 29 untreated depressed
controls (UDC). We assessed risk phenotypes, comorbidities, and treatment,
including ECT. We also performed pharmacokinetic analyses of CYP2D6 and
CYP2C19.

Results DTD patients significantly more often suffered from comorbid
psychiatric diseases, especially ICD-10: F40-F48 (DTD:40.4%, UDC:17.2%, OR
11.87, p=0.011) than UDC patients. DTD patients receiving ECT were more
likely to achieve remission (37.7% vs. 11.8%, OR=3.96, p=0.023).
Treatment with ADs did not differ between remitters and non-remitters. No
significant differences were observed in the distribution of CYP2D6 and
CYP2C19 variants between both groups.

Conclusion Patients with DTD appear to experience comorbid neurotic stress
and somatoform disorders (ICD-10: F40 – F48) more frequently. Therefore, a
comprehensive differential diagnosis is crucial when patients do not respond
sufficiently to antidepressant medication. Genotyping CYP2D6 and
CYP2C19 should be considered.
Association Between HLA-DRB1 Alleles and Gravesʼ Disease in Asian
Populations: A Meta-Analysis
Authors: Li Wenyi , Ke Tingyu , Wang Jia , Zhu Fangling , Chi Yan
Published: May 2024

Graves’ disease (GD) is an autoimmune disease that primarily affects the thyroid
gland. It is the most common cause of hyperthyroidism. Genetic studies have
shown that human leukocyte antigen (HLA) plays an important role in the
development of GD. In this article, we performed a meta-analysis determined to
evaluate the relationship between HLA-DRB1 alleles and GD. This meta-analysis
included 9 studies (3582 cases in the case group and 23070 cases in the control
group) and 27 alleles was performed. The combined results showed that, compared
with the control group, GD patients have a significant increase in the frequency
of DRB1*1403 (OR=2.50, 95% CI=1.78–3.51, pc<0.0001) and have a significant
decrease in frequencies of DRB1* 0101 (OR=0.45, 95% CI=0.34–0.59, pc<0.0001)
and DRB1*0701 (OR=0.44, 95% CI=0.35–0.55, pc<0.0001). The meta-analysis
indicated that, in Asian populations, DRB1*1403 is a risk allele for GD, and
DRB1*0101 and DRB1*0701 are protective against the occurrence of GD. We
surprisingly discovered that the susceptibility alleles for GD in Asian
populations are completely different from Caucasians and the protective alleles
for GD in Asians are quite similar to those of Caucasians. The results of our
study may provide new opportunities for gene-targeted therapy for GD in Asian
populations.
Twelve Steps to Optimize Scar Outcomes in External Rhinoplasty
Authors: Soto-Galindo Germán A. , Saghir Meshari , Apaydin Fazil
Published: May 2024

A well-healed scar extends beyond a mere superficial concern, reflecting the precision and care underlying the surgery. This study addresses the lack of recent literature on the complete closure technique for external rhinoplasty scars, emphasizing its potential impact on patient satisfaction and overall aesthetic quality. The main purpose of this article was to introduce and assess the efficacy of a novel closing suture technique for external rhinoplasty and emphasize on 12 specific steps for wound closure. A cohort of 104 patients who underwent external rhinoplasty utilizing the proposed closing suture technique were evaluated. Standardized photographic documentation and scar assessment were performed using the Vancouver–Manchester scale, considering notching, skin level differences, pigmentation, and overall appearance. The surgical approach involved a combination of vertical mattress and interrupted simple sutures, creating an effective closure framework. Analysis revealed an absence of poor scars, with 83.6% classified as good. Note that 65.5% of the good scars achieved a perfect 6-point score. While one moderate scar scored 3 points, the majority demonstrated optimal outcomes. Clinical photographs further illustrated the technique's success, showcasing imperceptible scars and reinforcing the efficacy of the complete closure approach. Our study introduces and assesses the efficacy of the complete closure technique for external rhinoplasty scars. The approach consistently yields positive outcomes, with an emphasis on almost imperceptible scars. While not achieving a 100% imperceptible scar rate, this study underscores the need for ongoing research to refine techniques and enhance patient satisfaction in external rhinoplasty. The proposed technique contributes significantly to scar management practices and encourages further exploration within the evolving landscape of rhinoplasty.
Case Report on Caries Assessment Using Intraoral Scanner Compared with Bitewing Radiographs
Authors: Siew Bernard , Enax Joachim , Meyer Frederic
Published: May 2024

Dental caries remains one of the main reasons patients seeing their dentist. They either show up for preventive measures, diagnostics, or treatment of present caries lesions. To date, diagnostics are performed visually, supported by using bitewing radiographs. While radiographic diagnostics should only be performed on a biannual basis, and some caries process will not be seen with visual diagnostics, there remains a lack in regular checkups. Therefore, different technical applications can be used for regular diagnostics. One of those is the near-infrared imaging (NIRI) technology. In this case report, a patient presented with incipient caries lesions. These lesions were diagnosed visually, radiographically, and using NIRI. After diagnosis of incipient caries lesions, the patient was advised to use a hydroxyapatite toothpaste and a hydroxyapatite gel for the remineralization of the lesions and prevention of caries progression. The patient was followed up for 6 months with regular checkups in between. Visual diagnostics and NIRI were used to detecting the caries progress. After 6 months, bitewing radiographs were used in addition. In this clinical investigation we were able to show for the first time that NIRI and bitewing radiographs are able to detect and follow incipient caries lesions. Additionally, this study highlights that hydroxyapatite-containing oral care products are able to arrest and remineralize the caries process.