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电力杆塔与5G站址开展共享共建，对提高资源利用效率、降低电信企业成本具有现实意义。构建电力杆塔与5G站址规划以及典型应用场景的规模化匹配方法，对于优化提升电力杆塔共享匹配度，摸底电力杆塔资源共享潜力，做好电力杆塔共享资源大范围推广后的统筹优化至关重要。针对电力杆塔和5G站址，构建了基于站距和站高的规模化匹配方法，以及考虑技术、政策和商业约束等情景的匹配度测算方法，并以福州长乐全域为例进行实证分析。结果显示，不同场景下电力杆塔和5G站址的匹配度差别较大，市人口密集区、工业园区匹配度可达50%，高铁沿线匹配度不足10%。若进一步考虑技术、政策、商业约束要素，则匹配度将进一步缩小，在四重要素叠加下，匹配度约为14%。虽然匹配程度不足，但考虑到全国电力杆塔和5G站址体量巨大，依然具备较大的共享潜力和良好的合作空间。

针对无线通信传统接收机的信道估计和译码分开处理是次优的问题,文章提出了一种联合信道估计和极化码译码的接收机模型。根据极化码译码器级联的循环冗余校验码的校验信息,接收机将译码器中部分硬判决信息再编码,然后将得到的码字反馈到信道估计器中,此时相当于接收机挑选了部分码字比特作为导频,信道估计器根据新的导频重新进行信道估计。文章提出的接收机模型及算法不仅减少了信道估计中导频的开销,还使得信道估计和译码两个过程相互促进,从而改善了极化码的误帧率。仿真结果表明,当归一化多普勒等于0.02时,文章提出的基于硬判决反馈的接收机相比于传统的接收机有2 dB的性能增益。

首先简要概述英国交直流输电网的发展现状，然后从交流和直流规划两方面阐述了其理念和方法。交流电网规划方面包括未来电力能源情景的选择和制定、电网模型的建立、未来电网需求分析、电网规划技术性和经济性分析等，直流输电系统规划方面包括直流输电系统对交流输电网潮流阻塞成本的影响、直流输电规划的参考成本以及直流输电系统的经济性分析等，并分别给出了实践案例。最后结合英国电网规划的理念和方法，提出了其对中国电网规划的借鉴意义，以为中国未来电网规划工作提供对比和参考。

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Objective The aim is to study the deactivation mechanism of waste lubricating oil hydrogenation catalyst. Methods Taking NiMo/y-Al2O3 catalyst as the research object, the catalyst and oil before and after hydrogenation were characterized and analyzed, so as to find out the cause of catalyst deactivation. Results The catalyst showed superior initial hydrogenation activity, and the removal rates of sulfur (S), nitrogen (N) and chlorine (Cl) could reach 83.6%, 81.7%, and 99.7%, respectively. However, with the progress of the reaction, the activity of the catalyst decreased seriously from the 4th week. The characterization of the catalyst before and after the reaction showed that the specific surface area and pore volume of the catalyst decreased significantly after the reaction, and the silicon content in the catalyst composition increased significantly after the reaction, Conclusions The reason for the decrease of catalyst activity was neither the loss of active metal nanoparticles, nor the damage of catalysts microstructure, but with the hydrogenation reaction, the silicon in the oil was gradually deposited on the catalyst surface after hydrogenation, resulting in the active site being covered and unable to contact with the reactants. On the other hand, the accumulation of silicon in the fixed bed pipeline limited the mass transfer and heat transfer efficiency, and reduced the reactivity. [ABSTRACT FROM AUTHOR]

The structure characteristic of polyvinylidene fluoride membrane and graphene oxide was main introduced, respectively, and the advantages of organic-inorganic hybrid membrane were analyzed. The preparation method of GO/PVDF membrane were stated in detail, including solution casting method, electrospinning method, chemical grafting method, vacuum filtration method and so on. Based on the recent research status, the advantages and disadvantages of the above methods were analyzed. Then, the effects of GO on pore size, hydrophilicity and hydrophobicity, membrane flux, rejection, and mechanical properties of membrane were expounded. And the applications of GO/PVDF membrane in water treatment and other potential applications were reviewed. It was found that the solution casting method was simple and short, and the membrane produced by the chemical grafting method had a stable bond between each component and a long service time, while the membrane produced by the electrostatic spinning method had a large specific surface area and high porosity. The capillary action of the GO lamellar capillarity occurred, and the smaller particles would pass through the GO lamellar at a faster speed, the membrane flux was improved in macroscopic view. GO also improved surface finish, reduced the impurities blockage and pollution, and then improving service life of GO/PVDF membrane. The research direction and development trend of GO/PVDF membrane was prospected, thus would provide theoretical basis and technical support for the construction of efficient and stable PVDF separation membrane. [ABSTRACT FROM AUTHOR]

The marine-terrestrial interlaced zone serves as a crucial spatial hub linking the functional zoning of both land and sea areas. Optimizing the ecological function, economic function, and national security function of the marine-terrestrial interlaced zone is of significant importance for promoting the coordination between land and sea functional oriented zoning and achieving their mutual beneficial interaction. It also contributes to enhancing the economic, social, and environmental benefits, effectively allocating resources, and advancing social sustainability. Building upon the clarification of the current development status and characteristics of China's marine-terrestrial interlaced zone, the research systematically examines the key issues existing in the coordination between land and sea functional oriented zoning at the marine-terrestrial interlaced zone. Furthermore, it puts forward key construction tasks and development pathways aimed at enhancing the coordination functions of the marine-terrestrial interlaced zone. [ABSTRACT FROM AUTHOR]

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