"Three-in-One" Ecological Development and Efficient Utilization Model of Aggregates

Green mining and the formation of an effective and efficient development model have become key issues that aggregates enterprises around the world need to solve urgently.On the basis of analyzing the development status of aggregates industry in Xiluodu area,the paper studied the main problems faced in the construction of green aggregates mines at present,and proposed a"three-in-one"ecological,intelligent and efficient green mine construction model for"ecological development","green logistics"and"solid waste recycling"of aggregates.The study has certain theoretical value and practical significance for the construction of green aggregates mine in Xiluodu area.

Conversion of carbon dioxide to valuable petrochemicals:An approach to clean development mechanism

The increase of atmospheric carbon dioxide and the global warming due to its greenhouse effect resulted in worldwide concerns. On the other hand, carbon dioxide might be considered as a valuable and renewable carbon source. One approach to reduce carbon dioxide emissions could be its capture and recycle via transformation into chemicals using the technologies in C1 chemistry. Despite its great interest, there are difficulties in CO2 separation on the one hand, and thermodynamic stability of carbon dioxide molecule rendering its chemical activity low on the other hand. Carbon dioxide has been already used in petrochemical industries for production of limited chemicals such as urea. The utilization of carbon dioxide does not necessarily involve development of new processes, and in certain processes such as methanol synthesis and methane steam reforming, addition of CO2 into the feed results in its utilization and increases carbon efficiency. In other cases, modifications in catalyst and/or processes, or even new catalysts and processes, are necessary. In either case, catalysis plays a crucial role in carbon dioxide conversion and effective catalysts are required for commercial realization of the related processes. Technologies for CO2 utilization are emerging after many years of research and development efforts.

Selecting method of districts with science and technology program’s priority support and its positive analysis

According to growth pole theory, this paper puts forward that when allocating regional science and technology (S&T) innovation resources based on S&T program, should abide the principle that important area receives priority support; Meanwhile, it designs method to ascertain district S&T advantage and S&T innovation resources utilizing efficiency as well as S&T developing speed by using component analysis and DEA method, and then constructs three-dimension selecting model,by which a positive research on Heilongjiang is made, the purpose of which is to offer scientific method support and decision-making foundation for making regional S&T program.

Urban development and resource endowments shape natural resource utilization efficiency in Chinese cities

Improving the efficiency with which natural resources are utilized is an indispensable for achieving sustainable development and carbon neutrality. By analyzing the utilization efficiency of energy, water, and land, we established a comprehensive natural resource utilization efficiency index(NRUEI). We then calculated the 2016 index for 165 cities in China,and investigated what caused it to vary. We found three main results:(1) the NRUEI varied greatly across China and there were significant positive correlations between urban energy utilization efficiency(EUE), water utilization efficiency(WUE) and land utilization efficiency(LUE);(2) the NRUEI showed a significant positive correlation with a city’s population size,economy(Gross Domestic Product(GDP)), and the level of urban social development(GDP per capita);(3) cities in East China have the highest natural resource utilization efficiency,while cities in Northeast China have the lowest. These results indicate that China’s increasing urban development is associated with rising natural resource utilization efficiency and that the city’s endowment of natural resources is an important factor affecting that efficiency. Further, the results showed that the determinants of a city’s NRUEI differed in large and small cities. Lastly, our results suggest that improving EUE is key for improving NRUEI in urban China, and different efficiencies can be improved intertwined. A major takeaway of this study is that there is great potential for improving natural resource utilization efficiency in Chinese cities and we include city-specific suggestions for efficiency improvements.

Ways to Achieve Sustainable Development for the Steel Enterprises

Sustainable development strategy is the only choice for steel companies in China. Starting with environment protection, energy-saving and integrated resource utilization, supported by technology advancement and environmental investment, sustainable development strategy can be implemented to drive the circular economy. Thereby, the responsibility to realize the long-term harmony and synergy between society and enterprises is taken by Baosteel.

医疗机构采购岗位廉政建设工作质效认可度分析

目的 探讨如何约束医疗机构廉洁风险防控领域采购重点岗位人员行为,全力预防和减少腐败行为的发生。方法 通过营造廉洁教育环境、加强专业技能培训、规范接待来访人员管理三方面加强医院廉政建设,采用问卷形式对医院采购业务关联人员开展全面调查,运用SPSS 19.0统计学软件进行统计学分析。结果 医院采购业务关联人员对于廉政风险防控系列举措质效整体评价分值为(4.87±0.38)分;不同部门、年龄、工作年限对廉政风险防控系列举措质效认可度影响差异有统计学意义(P <0.05);财务纪检审计分值为(4.53±0.45)分、临床医技及研究机构分值为(4.72±0.46)分,低于部门整体均值(4.79±0.16)分;年龄> 45~55岁及> 55岁分值分别为(4.76±0.44)分、(4.65±0.45)分,低于各年龄段整体均值(4.79±0.09)分;工作年限> 15年分值为(4.77±0.43)分,低于工作年限整体均值(4.83±0.04)分。超过50%的调查对象认为廉政风险防控能力的提升需从持续加强营造廉洁教育环境方面入手。结论 通过三方面措施确实可以有效提高医院廉政风险防控能力;通过分析不同属性人员对廉政建设工作质效认可度差异及调查对象对廉政建设具体措施建议,可以为进一步提高廉政风险防控能力明确方向,为医疗机构健康、有序高质量发展保驾护航。

东北黑土区典型县域农牧系统养分流动特征分析

在保障粮食安全的前提下,东北黑土区作物和畜牧生产的耦合促进了农业绿色发展。本研究选择位于东北黑土区的吉林省农安县为研究区域,以农牧系统为研究边界,通过实地调研、统计数据和文献,结合食物链养分流动模型(NUFER:NUtrient flows in Food chains,Environment and Resources use)定量分析1990—2020年农牧系统氮磷养分流动、利用效率和环境损失,探究气候和社会经济因素对氮磷排放的驱动作用,并设置平衡施肥(减少化肥施用)和有机肥替代(提升有机物料替代)两种情景评估该县减排潜力。结果表明,相对于1990年,2020年农安县农牧体系氮磷输入量分别下降45%和23%,其中化肥施用是最大的输入项。作物和农牧系统养分利用率波动增加,而畜禽系统养分利用率下降并逐渐趋于稳定。农牧体系氮磷损失量较1990年分别减少41%和增加29%。农田氨挥发、径流侵蚀和畜禽粪便直排为主要排放途径。通过平衡施肥和有机替代,土壤氮磷积累处于较低水平,至2030年农安县化学氮肥有80%的减施潜力,化学磷肥有85%的减施潜力,且氮磷养分环境排放均减少67%,作物和农牧系统养分利用率均增长50%以上。综上,农安县农牧体系未来可通过增加秸秆和粪便还田量提升化肥减施潜力。东北黑土区应继续深化化肥零增长政策,推行有机废弃物资源化利用,实现农牧系统协同优化发展。

南水北调中线工程水源区环境规制对经济高质量发展的影响

为研究南水北调中线工程水源区环境规制通过水资源利用对区域发展质效的影响,基于2005—2022年南水北调中线工程水源区12个城市的面板数据,构建基准回归模型、中介效应模型和门槛效应模型,实证分析了环境规制、水资源利用效率和经济高质量发展之间的关系。结果表明:环境规制对经济高质量发展具有正向促进效应,该促进效应在不同区域间存在异质性,环境规制的促进作用在用水量小的地区更加显著,而在用水量大的地区,丰富的水资源限制了环境规制对经济高质量发展的促进作用;在环境规制影响区域,水资源利用效率在经济高质量发展过程中发挥出显著的中介作用,水资源利用效率中介效应占环境规制总促进效应的比例为13.5%;水资源利用效率在环境规制对经济高质量发展影响中具有门槛效应,当水资源利用效率超过4.3后,环境规制对经济高质量发展的促进效应显著增强。

肥料产品绿色智能设计思路

肥料是支撑农业绿色发展转型的重要载体。我国化肥行业存在能源消耗高、绿色清洁技术少、肥料与农业需求脱节等问题。针对现有问题,根据张福锁院士提出的“绿色智能肥料”新理念,从肥料绿色化、智能化设计角度提出一种产品设计思路,对创制在资源属性、能源属性和环境属性方面实现养分资源充分利用的绿色智能肥料产品进行探索性讨论。

LIBS测量飞灰含碳量的研究现状及展望

飞灰含碳量是评价燃煤锅炉燃烧效率的重要参数之一,实现其在线测量对于提高燃煤机组节能水平与智能化发展具有重要意义。激光诱导击穿光谱(LIBS)作为一种具有竞争力的在线快速测量技术,在飞灰含碳量测量方面的应用已取得了较大进步。本文综述了LIBS测量燃煤飞灰含碳量的基础研究进展,根据测量时飞灰样品形态差异,梳理了LIBS在不同测量模式下的测量参数优化方法;总结了目前LIBS测量飞灰含碳量的光谱数据处理方法和定量分析算法的发展趋势;回顾了在实际工业中LIBS测量飞灰含碳量的应用现状,并对未来研究方向进行了展望。

Understanding the change of land space utilization efficiency with different functions and its coupling coordination: A case study of Urban Agglomeration in the Middle Reaches of the Yangtze River, China

Land spaces function in capacities of urban development,agricultural production,and ecological conservation,among many others.Research of land space utilization efficiency(LSUE)and coupling coordination relationships among its subsystems are significant for sustainable land space development.In this study,taking the Urban Agglomeration in the Middle Reaches of the Yangtze River(UAMRYR)as the study area,we establish a measurement index system to evaluate the LSUE(2000–2018)and analyze its coupling coordination degree by utilizing an improved coupling coordination model.The main results include the following.(1)The average efficiency levels of urban space and agricultural space in the UAMRYR increased 2000–2018,while the average efficiency of ecological space declined.(2)The spatial pattern of the LSUE values varied greatly,with the distributions of high-efficiency and low-efficiency levels significantly different.(3)The coupling degree of LSUE includes three types,i.e.,high-level coupling,break-in,and antagonism.Each coupling degree type was characterized by change over time.(4)The proportion of areas with high coupling coordination and moderate coupling coordination increased from 2000 to 2018,while the proportion of areas with basic coupling coordination,moderate imbalance,and serious imbalance declined during this period.Given that the spatial differentiation of the LSUE and its coupling coordination,it is necessary to implement a differential land space development strategy in the UAMRYR.This study is helpful to promote the efficient utilization and coordinated development of land space utilization systems.

关于存量时代提高房地产流通和使用效率的几点思考

房地产供求关系发生重大变化,标志着房地产市场进入了存量房交易为主的新发展阶段,提高房地产流通和使用的效率成为新阶段的重要任务。本文总结了房地产市场新发展阶段的新矛盾、新重心和新特点,分析了贯穿新发展理念要把握的规律、要认清的现实和要坚持的原则。提出构建新发展格局要优化的调控政策、完善的市场制度,以及采取的具体措施。

西凉灌区高效节水灌溉工程供需水平衡分析

黄土高原区水资源紧缺,为了确保农业节水项目科学布设,文章对项目区水资源状况及开发利用、可供水量和节水灌溉模式、农业灌溉制度、农作物需水量等进行了探讨和计算,采用供需平衡法对项目区需水平衡进行了论证,得出项目区水资源富余,可以实施西凉灌区节水灌溉工程,为天水地区农业节水灌溉工作开展提供了保障。

桂西锰资源开发现状及锰产业发展分析

当前,全球锰产品需求巨大。桂西要充分利用锰资源优势,把锰业做大,让锰工业在国民经济发展中发挥重要作用。同时,要加强对锰矿资源的合理开发与有效保护,整顿锰矿秩序,加快资源整合,调整开发结构,实现优质优用,进一步提升资源节约集约利用水平,促进资源高效利用。本文结合桂西锰资源开发现状,分析锰产业发展的必要性,展望锰产业发展趋势,提出锰产业发展的初步思路和建议,以推动桂西锰产业实现高质量发展。

“一带一路”中国区域水资源利用效率与经济社会发展关系评估

选取“一带一路”中国区域17个省(区、市)2010—2020年的面板数据,通过引入超效率SBM模型评估水资源利用效率,并运用Tapio脱钩模型分析水资源利用效率与经济社会发展间的协同状态。结果表明:17个省(区、市)水资源利用效率均值大体呈东南>西南>西北>东北的格局,且大致可划分为3个梯队,其中青海、重庆、广东和宁夏的水资源利用效率均值在11年间均超过1.0000,均值最低的是新疆,仅为0.0935。从核密度分布结果来看,整体区域内水资源利用效率总体差距有一定程度的缩小。分别以3年和整个研究时段为窗宽分析水资源利用效率与经济社会发展适配状态,结果显示适配状态具有阶段性变化特征,呈现较强空间差异;其中,吉林协同性最好,海南、青海、陕西、广西和重庆5个地区表现为强脱钩状态,其余省(区、市)大多为弱脱钩状态,需在确保经济增长和推进城镇化的同时,推动水资源利用效率的提升。

新经济时代塑料工业高质量发展与数字化转型的思考

本文分析塑料工业面临的环境保护压力和资源利用效率问题,强调绿色制造和循环经济模式的重要性,讨论了数字化技术(如物联网、大数据和人工智能)在提升生产效率、优化供应链管理和促进产品创新中的应用前景。提出了政策建议和发展策略,推动塑料工业的数字化升级,为实现可持续发展目标奠定基础。

油田长关低效井地热资源的开发与利用

在国家双碳目标的大背景下,油田大力发展清洁能源替代下的低碳生产路径,并充分开发利用油田独有的长关井地热资源,成为了重要的研究方向和实践领域。以海拉尔油田某作业区为研究对象,采用同轴换热改造技术及热泵技术,实现了该作业区周边长关井地热能的开发与利用。结合工艺设计及数学模型建立,对该作业区周边长关井地热资源进行了系统性评估,区域内岩热资源储量为18.6×10^(8)GJ,可采地热资源量为4.6×10^(8)GJ,折合标准煤约6320×10^(4)t。根据评估结果制定出相应的作业区供暖替代方案,将距生活区锅炉房1.5 km范围内的20口长关井改造成地热井,替代原有的燃油锅炉供暖,可节约原油1424 t/a,节约标煤1588.3 t/a,CO_(2)减排4399.5 t/a,节约运行费用301.5万元/a。在充分研究油田长关井综合性质的基础上,结合先进的地热能源开发技术,可以有效提高能源利用率并减少环境污染,对未来地热资源的开发与利用具有重要借鉴意义。

土建工程中绿色施工技术与可持续发展策略

本文核心在于探讨土木工程中绿色施工与可持续发展的现状、挑战及推进策略。通过文献与案例分析,揭示了绿色施工理念在实践中的应用障碍和政策空白,指出普及不足与缺乏具体政策支持是主要困难。进一步识别并讨论了促进发展的策略,包括深化绿色理念认识、完善管理规定、发展绿色资源和优化施工方案等。案例分析显示,这些策略对减少碳排放和提高资源效率具有显著效果,旨在为土木工程领域提供绿色施工的实践参考。

城市土地利用规划对城市可持续发展的影响

本文对相关研究文献进行了分析,探讨了城市土地利用规划对城市可持续发展的影响。城市土地利用规划在促进城市可持续发展中具有重要的作用:引导土地的合理使用,优化城市空间布局,提高资源利用效率,促进环境保护,以及推动经济发展和社会进步。然而,当前城市土地利用规划在实践中还存在一些问题和挑战,包括规划执行不力和决策过程不透明、利益冲突等。因此建议加强城市土地利用规划的科学性、民主性和透明度,提高规划的实施效果,以推动城市可持续发展。