[Objective]In response to climate change,the energy supply side is inevitably shifting from high-carbon to low-carbon sources.The natural gas and new energy industries are collaborating and have created multi-level integration scenarios.In this study,the symbiosis theory was applied to elucidate the symbiosis mechanism and synergistic strategies between the two industries,aiming to foster the development of the new energy industry relying on the natural gas industry chain,maximize their symbiotic value,and facilitate the low-carbon transition of the energy system.[Methods]Using the analytical framework of symbiosis theory,theoretical deductions were conducted to identify the symbiosis mechanism between the natural gas and new energy industries.A symbiotic system was constructed based on three elements:symbiotic units,symbiotic environment,and symbiotic models.Additionally,a symbiotic model classification matrix,combining symbiotic organization and behavior models,was introduced to analyze the interactive status,behavioral patterns,and evolutionary trends at various symbiotic interfaces.[Results]The natural gas and new energy industries share a strong foundation for symbiosis.Supported by a favorable symbiotic environment,they establish multi-dimensional interfaces across areas such as peak shaving through gas power generation,transportation,urban heating,oil and gas exploration,and the entire hydrogen energy industry chain.However,based on energy flow characteristics,interactive status,and behavioral patterns at these interfaces,the current level of symbiotic organization and mutual benefit remains relatively low.In various symbiotic models,the natural gas industry concedes some benefits to the new energy industry.[Conclusion]To achieve effective synergy between the two industries,the following strategies are recommended:(1)Strengthen symbiotic units by creating scenarios that deliver economic,social,and environmental benefits,fostering complementary relationships,and advancing positive symbiotic development.(2)Expand two-dimensional symbiotic interfaces,particularly by exploring full-industry-chain collaboration between natural gas and hydrogen energy.(3)Optimize the symbiotic environment by improving institutional mechanisms,advancing hydrogen-blended natural gas terminal utilization technologies,and training interdisciplinary low-carbon energy professionals.(4)Clearly define symbiotic roles to achieve harmonious collaboration and guide the evolution of symbiotic models toward higher levels of integration and mutual benefit.(2 Figures,2 Tables,34 References)

The urgent global transition toward low-carbon energy systems has highlighted the need for systematic planning of hydrogen refueling stations (HRS) to facilitate clean energy adoption. This study develops an integrated framework for regional HRS layout optimization and carbon emission assessment, considering population distribution, land area, and hydrogen demand. Using Hainan Province as a case study, the model estimates regional hydrogen demand, determines optimal HRS deployment, evaluates spatial coverage and refueling distances, and quantifies potential carbon emission reductions under various renewable energy scenarios. Model validation with Haikou demonstrates its reliability and applicability at the regional scale. Results indicate pronounced spatial disparities in hydrogen demand and infrastructure requirements, emphasizing that prioritizing station deployment in densely populated urban areas can enhance accessibility and maximize emission reduction. The framework offers a practical, data-efficient tool for policymakers and planners to guide early-stage hydrogen infrastructure development and supports strategies for regional decarbonization and sustainable energy transitions.

with the rapid development of urbanization, the number of non-residential users of gas consumption continues to increase, and the corresponding security wind direction and problems are increasing. By combing the gas safety management process of non-residential users in large-scale urban gas enterprises, embedding the whole life cycle management process, improving the quality of gas safety management of non-residential users, eliminating some potential safety hazards and reducing the accident development rate, at the same time for other enterprises in the same industry to provide reference.

[Objective] Oil and gas enterprises not only serve as a major driving force in low-carbon energy transformation but also represent a crucial domain for achieving both economic development and carbon emission reduction. Therefore, their high-quality development holds significant importance in advancing carbon peaking and carbon neutrality in an orderly manner. [Methods] Considering the evolving landscape aimed at achieving the “dual carbon” goals and the emerging development trends within oil and gas enterprises, this paper integrates relevant theories and findings from literature research to discuss the connotations and characteristics of high-quality development of these enterprises. It provides a comprehensive examination of the opportunities and challenges encountered in the current developmental phase and explores the viable paths to promote high-quality development in oil and gas enterprises under the guidance of the “dual carbon”goals. [Results] The implications of high-quality development within oil and gas enterprises in the context of “dual carbon” were clarified as follows: Oil and gas enterprises leverage their full resources to invigorate the development momentum by transforming development modes and optimizing development structure, with the goal of overcoming bottlenecks in energy and environmental factors, to reconstruct a highquality development value system that encompasses economic, social, and environmental aspects and fosters development characterized by low-carbon, rationality, innovation, and sustainability. Key challenges impeding their progress include the formidable pressure of emission reduction, inadequacies in ensuring energy supply, and deficiencies in technological innovation. The paths identified to foster their highquality development involve focusing on energy conservation and emission reduction, deepening industrial restructuring, promoting application innovations in the digital economy, expediting advancements in green technology, reinforcing capital support, accelerating the nurturing of green talents, creating a long-term management system, and enhancing collaboration in the environmental field. [Conclusion] Amidst the backdrop of “dual carbon”, it becomes imperative for oil and gas enterprises to proactively initiate measures to align with evolving development requirements, striving for coordinated progress in securing energy supply and advancing green, low-carbon transformations while reconstructing the value system for high-quality development.

Recognizing the critical role of oil and gas resources as strategic assets and acknowledging the increasing emphasis on green development and social responsibility driven by international energy agreements and the “dual carbon” strategy, this study addresses the urgent need for a robust employee evaluation framework within China’s petroleum sector. While existing systems often prioritize competence-based indicators, they frequently overlook the crucial aspect of employee Moral Quotient (MQ). This research focuses on developing and validating a holistic, scientifically grounded, multi-dimensional, and dynamic MQ evaluation index system tailored specifically for Chinese petroleum enterprises. The study employed a mixed-methods approach, integrating a comprehensive literature review, semi-structured interviews with industry experts, and robust quantitative techniques, including the Analytic Hierarchy Process (AHP) and the entropy weight method. A two-round Delphi study, involving 18 experts from six provinces across China, ensured broad representation and facilitated the construction of the evaluation index system and the determination of indicator weights. The Delphi process achieved a high degree of expert consensus, evidenced by a 100% questionnaire response rate in both rounds, expert authority coefficients of 0.851 and 0.879, respectively, and Kendall’s coefficient of concordance of 0.243 and 0.247 (p < 0.01), respectively, demonstrating strong reliability and scientific validity. The resulting MQ evaluation index system comprises eight first-level indicators and thirty-three s-level indicators, encompassing key dimensions of employee morality relevant to the petroleum industry. This comprehensive system provides a robust and objective tool for employee selection, training, performance evaluation, and career development within Chinese petroleum enterprises, supporting informed decision-making in human resource management and fostering a culture of ethical conduct and sustainable development. Furthermore, the developed framework offers valuable insights and serves as a potential model for petroleum enterprises and other resource-intensive industries globally seeking to integrate MQ assessment into their human capital management strategies.

This paper summarizes the current research status and future outlook of direct hydrogen production technology from seawater in China. With the growth of global energy demand and prominent environmental problems, hydrogen energy has been attracting attention as a kind of clean energy. The research on direct hydrogen production from seawater in China involves various fields such as electrolysis of water, photoelectrochemistry, electrocatalysis, membrane technology and polygeneration technology, and has made progress in demonstration projects, joint test bases, system integration and optimization, and industrial chain development. Technology application scenarios include offshore oil platforms, coastal islands, ocean development and protection, emergency energy supply and industrial parks. Looking ahead, China will focus on technology development priorities such as high-efficiency catalysts, advanced membrane technology, intelligent control systems, optimization of multi-generation technology, application of new energy integration technology, exploration of low-cost materials and improvement of seawater pretreatment technology. At the same time, it will promote the large-scale application and industrialization of seawater direct hydrogen production technology by constructing large-scale demonstration projects, perfecting industrial chain, expanding policy support and financing channels, strengthening international cooperation and technical exchanges, building human resources, as well as market promotion and application scenario expansion.

The natural gas industry is crucial for the carbon emission reduction, energy security, and structural transformation of China’s energy system. Therefore, the high-quality development of the industry can inject impetus for the green transformation of the economy and society, construction of a new type of energy system, technological innovation, and international cooperation. This study analyzes the basis for and major challenges faced by the high-quality development of China’s natural gas industry. Specifically, the weak links in the high-quality development of the natural gas industry is mainly manifested in the insufficient supply capacity, incomplete market mechanism, and lack of innovation capabilities regarding key technologies and equipment. In this regard, the study proposes a path for the high-quality development of China’s natural gas industry: (1) guaranteeing the safe supply of natural gas, (2) improving the market system of the natural gas industry, (3) promoting the upgrading of technologies and equipment in the natural gas industry, and (4) accelerating the green and low-carbon development of the natural gas industry. This aims to innovate the development ideas of the natural gas industry and better satisfy the requirements for realizing high-quality economic development, guaranteeing energy security, promoting carbon peaking and carbon neutralization, and achieving balanced industrial development.

Abstract Green technology innovation is the fundamental guarantee to achieve the dual-carbon goal and an important driving force for the sustainable economic development of provinces along the "Belt and Road". Based on the data of 17 provinces along the Belt and Road from 2011 to 2020, this paper uses the super-efficiency SBM model and Malmquist index to measure and evaluate the efficiency of green technology innovation. The results show that from 2011 to 2020, the efficiency of green technology innovation in the provinces along the "Belt and Road" shows a fluctuating upward trend as a whole, and there are large differences among regions. Spatially, it shows the characteristics of "high east, low west" and "high south, low north". There are obvious development differences and differences between the southeast region and other regions. The average value of Malmquist index in provinces along the Belt and Road is greater than 1. The overall development situation is good. Malmquist index is mainly affected by pure technical efficiency and technological progress. Finally, suggestions for regional development and improvement of green technology innovation efficiency are put forward.

The "Belt and Road Initiative" (BRI) has been put forward for ten years, during which energy cooperation has always been a key focus. Driven by energy revolution and China's economic mode transition, energy cooperation has new characteristics of the era, that is, its quality is getting higher. Based on the goal of "high-quality energy cooperation", this paper discusses the achievements of energy cooperation among BRI countries over the past ten years, analyzes the existing issues, and focuses on the state, enterprises, financial institutions, and the society to achieve a comprehensive evolution of high-quality energy cooperation through multi-level collaboration.

开展致密气规模效益开发对标管理分析,是向标杆学习先进经验从而提升致密气勘探开发水平的重要途径.四川盆地致密气勘探开发对标管理的关键是提出对比对象、构建一套科学合理的对标指标体系,并开展对比分析.研究结果表明:1)北美圣胡安盆地致密气可作为四川盆地致密气勘探开发对比的标杆对象;2)四川盆地致密气勘探开发对比可从资源、技术、经济、政策、管理5个方面筛选指标建立对标指标体系;3)四川盆地致密气具有巨大的资源潜力和可观的规模储量,但致密气勘探开发技术仍然面临巨大的挑战,在经济效益、扶持政策、管理模式等方面与标杆对象还存在差距,在一定程度上制约了致密气产业发展.四川盆地应加快致密气勘探开发一体化步伐,油气企业应该建立对标管理长效机制,持续丰富和完善对标指标体系,通过学习先进、查找差距、补齐短板来提高致密气勘探开发水平.

An organic polymer cathode called poly(anthraquinone-alt-benzene) (PAQB) is in-situ synthesized between the monomers of 2,6-dibromoanthraquinone and 1,4-benzenediboronic acid bis(pinacol) ester based on the matrix of carbon nanotube (CNT), leading to the growth of a polymer on CNT (PAQB@C) and the better formation of electron transportation network. After optimization, the sample (PAQB@C) of PAQB grown on 2 wt% CNT shows the best results in Li-ion batteries. In half cells, PAQB@C shows the average discharge potential around 2.2 V (vs. Li+/Li) and peak discharge capacity of 184 mAh g-1, stably running for 1000 cycles. In full cells with the Liintercalated graphite (LiC6) as the anode, PAQB@C can deliver the peak discharge capacity of 187 mAh g- 1 cathode and peak energy density of 374 Wh kg-1cathode. And the full cells can show the long lifespan for over 2500 cycles. To the best of our knowledge, the comprehensive performance of PAQB@C is one of the best organic cathodes reported in Li-ion batteries.

Under the background of multiple challenges such as regional energy, environment, climate and economy, ASEAN "10+5" should explore new paths of energy cooperation. High-quality energy cooperation has its profound history, theory and realistic logic, which is reflected in the starting point, process and result of cooperation. Examining the present situation, predicament and foundation of bilateral and multilateral energy cooperation in ASEAN "10+5" region, it is found that although regional energy cooperation has made great progress, it faces difficulties such as fragmented cooperation, overlapping mechanism, poor environment, unstable relationship, concentrated content and structural imbalance. China should base itself on solving practical problems and cooperating for high-quality development, and explore a series of improvement and innovation strategies on the concept, relationship, goal, mode, environment, content, scope, structure, subject and benefit of regional energy cooperation, so as to enhance the stability,rationality, effectiveness, sustainability and toughness of energy cooperation.

巨额融资所带来的高昂融资费用,推高承包商的总成本,严重挤压其利润空间.承包商迫切需要对项目现金流进行优化,提高资金配置效率,降低融资费用.此外,为了应对不确定性干扰,承包商通常花费事前成本为活动添加时间缓冲,以保证进度计划稳定性,以减少事后变更和调整费用.因此,本文研究随机活动工期下考虑缓冲成本及效用的融资费用最小化项目调度优化研究,旨在为承包商生成具有一定鲁棒性的融资费用最小化基准进度.首先,界定研究问题并构建优化模型,在此考虑为活动插入时间缓冲所带来的成本及效用.其次,设计VNTS混合算法对模型进行求解,提炼相关性质以提高算法搜索效率,并在算例集合上进行算法测试.最后,通过案例对本文研究进行说明.研究结果可以为随机活动工期下承包商控制融资费用、提高项目收益,提供定量化决策支持.

为了保证我国能源安全、加大低碳能源发展、助推"双碳"目标实现,基于能源绿色转型、能源供给侧结构性改革以及中国石油西南油气田公司打造"天然气大庆"的背景,提出了构建"一带一路"成都国际天然气产业园区(以下简称园区)的设想.研究结果表明:①从理论与实践分析认为,"一带一路"沿线国家丰富的油气资源,四川良好的天然气产业基础和雄厚的科研实力,是成都建立国际天然气产业园区的潜力与优势;②建立成都国际天然气产业园区理论价值是现行国际产业园区理论的创新与拓展,实践价值在于促进"一带一路"天然气产业的可持续发展;③园区应具有平台、整合、带动、辐射等多功能定位,充分体现高标准、绿色低碳、开放包容、现代化、共享、共赢、共生的特点;④园区以政府搭台,绿色引领、企业主导,园区支撑,产业链合作、金融配套、全球开放的多元主体互动与联合机制,集天然气及可再生能源各要素的全面有机合作.结论认为:建立成都际天然气产业园区意义重大、并且必要可行,应尽快落地和实施.

The clean energy industry is not only an important fulcrum for promoting the green development of international energy cooperation, but also an inexhaustible driving force for global environmental governance and the energy transition. Therefore, it is of great significance to vigorously develop clean energy. First, the development of clean energy is a new trend in the transition of the energy structure. The vigorous development of clean energy can guarantee a stable energy supply to a certain extent, ease the pressure on the energy supply, and improve the consumption structure, which is currently overly dependent on coal and petroleum.

数字油气田是石油天然气企业依托油气田数字化为基础,充分利用工业互联网大数据和对应软件平台为支撑,加快促进石油天然气一体化发展模式进程的主要方向.为了解决传统数字油气田信息管理单一、信息数据丢失、安全管控僵硬等问题对油气田产业链产生的影响,基于BGM(BIM+GIS+MES)大数据架构,提出了更具直观性、互联性、保真性、参与性的新数字油气田应用平台实施方案.研究结果表明,新的数字油气田平台具有优势:构建以油气田数据为基础的多方协同智慧管理平台,解决了油气田各阶段数据丢损、远程管控和责任追溯的问题;利用大数据算法对油气田深入数据进行挖据分析,并将油气田各阶段数据进行集合、优化和平台显示.在对传统的数字油田数据进行整合后,构建出油气田生产与设施智慧管理平台,并针对性地提出建设过程中出现的应用难点和保障措施.

Since the second industrial revolution, the widespread use of various fossil fuels, such as coal, oil and natural gas, has boosted the rapid development of society and economy. However, the greenhouse gases emitted by the extensive use of energy have caused more and more serious environmental problems. In this context, optimization of the energy structure and accomplishment of the carbon-reduction targets are not just the focus and difficulty faced by China but even by the world. As a center in southwest China and a big province in energy consumption, Sichuan province’s energy consumption structure in the future will deeply influence its development under the background of accelerating industrialization and urbanization. And furthermore, the study on the relationship between energy consumption structure and carbon emissions in Sichuan province also provides a theoretical basis for the establishment of development planning in Southwest China. This paper is composed of the following parts: firstly, the characteristics of energy structure in Sichuan Province are analyzed by collecting the data of energy production and consumption over the years. Then, using the calculation method provided by IPCC, this paper calculates the carbon emissions generated by fossil energy consumption in Sichuan Province from 2005 to 2019, and analyzes its characteristics and trends. Finally, by analyzing the characteristics of the energy endowment and fossil energy consumption structure of Sichuan Province, this paper puts forward the “coal-gas transition balance theory” to discuss the impact of fossil energy consumption transition on carbon emissions, and provides guidance and ideas for the realization of emission reduction.

Energy is the focus of the "Belt and Road" Cooperation and the main battlefield for carbon peak and carbon neutrality. With the implementation of the "dual carbon" strategic goals, energy will inevitably develop towards low-carbon development at an accelerated pace. On the basis of elaborating on the connotation of the "dual carbon goals", this paper studies and analyzes the challenges in the process of the low-carbon energy development under the "Belt and Road Initiative", makes an in-depth analysis of the factors that restrict the low-carbon energy development under the "Belt and Road Initiative", and puts forward corresponding countermeasures and suggestions accordingly.

"双碳"目标和能源绿色转型背景下,"一带一路"绿色能源合作成为当前学术界和产业界关注的焦点,能源领域的绿色创新合作为"一带一路"绿色能源高质量发展带来全新契机.论文分别从能源市场、能源环境、合作主体、合作要素几方面,探讨了"一带一路"能源绿色创新合作的驱动力.能源市场和环境的变化是外部推力,合作主体是主要推力,绿色能源资源和绿色技术是主要的内部推力,研究结果为推动"一带一路"能源绿色创新高效合作提供了依据.

Bullwhip effect is prevalent in supply chains, creating supply and inventory risks that affect marketing, supply and production. However, there are limited researches on the optimization of chemical supply chain inventory management. In order to solve the above problem, this paper took the sulfur product supply chain of a sulfur plant as an example, combined with the idea of system dynamics, and systematically studied the inventory control strategy in the distributor-retailer two-level inventory system constituted by the supply chain. Firstly, the causal loop diagram was drawn according to the system relationship between variables in the two-level supply chain, and then the system dynamics model of sulfur product supply chain was formed. Finally, problems existing in the supply chain were explored through simulation, and optimization suggestions were submitted. It can be concluded from the simulation results that there was bullwhip effect in the sulfur product supply chain, and the delay of transportation time and the change of inventory adjustment time would have an impact on the inventory level of each node enterprise in the supply chain. Therefore, the method of building an information sharing platform, implementing visual information management, and adopting logistics transportation service outsourcing could enhance the information exchange among node enterprises, so as to improve the operational efficiency of the entire product supply chain.