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某1000MW超超临界机组不同配汽方式对经济性的影响研究

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汽轮机技术 2024年第5期66卷 389-392,397页

作者：夏芃葛宇孙嘉张进杨洪亮余海鹏杨文正蒋国安国家能源集团泰州发电有限公司泰州225327 哈尔滨汽轮机厂有限责任公司哈尔滨150046 中电神头发电有限责任公司朔州036800 国能南京电力试验研究有限公司南京210023

基于某1000MW超超临界机组,分别对喷嘴调节、全周进汽+节流调节、全周进汽+补汽阀调节等配汽方式进行了变工况计算分析,结果表明不同配汽方式对机组变工况性能影响主要体现在主汽压力和高压缸效率变化上,进而影响机组热耗率。针对该机... 详细信息

基于某1000MW超超临界机组,分别对喷嘴调节、全周进汽+节流调节、全周进汽+补汽阀调节等配汽方式进行了变工况计算分析,结果表明不同配汽方式对机组变工况性能影响主要体现在主汽压力和高压缸效率变化上,进而影响机组热耗率。针对该机组全年负荷率分布情况进行了综合经济性分析,得出了该机组经济性最优的配汽方式。

关键词： 1000MW超超临界汽轮机配汽方式经济性

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权重化QR分解的正交匹配追踪算法硬件实现

电子学报 2024年第5期52卷 1534-1542页

作者：王玺梁文凯杨虹张红升刘挺牟晓霜张磊余柏汕黎淼重庆邮电大学光电工程学院重庆400065

为在小型化、低成本的硬件平台实现正交匹配追踪(Orthogonal Matching Pursuit,OMP)算法,针对OMP算法中最小二乘法的问题,该文构造一个确定性的传感矩阵,提出一种低复杂度、低资源的权重化QR分解的OMP(Weighted QR decomposition OMP,WQ... 详细信息

为在小型化、低成本的硬件平台实现正交匹配追踪(Orthogonal Matching Pursuit,OMP)算法,针对OMP算法中最小二乘法的问题,该文构造一个确定性的传感矩阵,提出一种低复杂度、低资源的权重化QR分解的OMP(Weighted QR decomposition OMP,WQR-OMP)算法硬件结构,在ZYNQ 7020型号芯片上搭建WQR-OMP SOC系统.WQR-OMP算法在传感矩阵进行QR分解后,根据三角矩阵R中元素的分布特性,通过权重化运算只保留主对角线上的元素而其他余元素归零,得到对角矩阵D,然后近似计算稀疏向量的解.实验结果表明:与基于QR分解的OMP(QR decomposition OMP,QR-OMP)和Batch-OMP算法的硬件结构相比,WQR-OMP算法硬件结构的重构速度更快、存储资源更少.在压缩率为0.25的条件下,WQR-OMP SOC系统对256×256分辨率图像的重构时间为400 ms左右,其速率比仅使用ARM处理器的重构速率提高了约6.3倍.与其他现有研究对比,该系统在Block RAM存储资源消耗较少的情况下,进一步提升了重构速度,适用于存储资源受限的硬件平台.

关键词：正交匹配追踪算法最小二乘权重化 QR分解 ZYNQ 7020

Bolstering Ties China-Cambodia Dialogue on Cultural and Economic Exchanges in Phnom Penh

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China Report ASEAN 2024年第10期9卷 56-57页

作者： Zhang yu 不详

On the afternoon of September7,the ChinaCambodia Dialogue on Cultural and Economic Exchanges,themed"building a China-Cambodia community with a shared future in the new era,"took place in Phnom Penh,capital of *** Zhanyuan,president of China International Communications Group (CICG),and Kha Leng,Secretary of State of the Ministry of Commerce of Cambodia,delivered speeches at the *** Pheaktra,Minister of Information of Cambodia,delivered an address via *** Cong,Minister Counselor of the Embassy of China in Cambodia,and Chhean Leang,Secretary of State of the Ministry of Information of Cambodia,also *** Wenge,president of the CICG Center for Asia-Pacific,presided over the opening ceremony.

关键词： sided Minister Secretary

Single transition-metal atoms anchored on a novel Diracdispersiveπ-πconjugated holey graphitic carbon nitride substrate:computational screening toward efficient bifunctional OER/ORR electrocatalysts

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Rare Metals 2024年第8期43卷 3819-3832页

作者： Chun-Yao Fang Xi-Hang Zhang Qiang Zhang Di Liu Xiao-Meng Cui Jing-Cheng Xu Cheng-Long Shi Meng-yu Yang College of Science University of Shanghai for Science and TechnologyShanghai 200093China School of Materials and Chemistry University of Shanghai for Science and TechnologyShanghai 200093China

Nonprecious-metal-group single-metal-atom catalysts with bifunctional catalytic capabilities toward the oxygen evolution reaction(OER)and oxygen reduction reaction(ORR)are highly sought after in energy-conversion and storage ***,producing renewable and sustainable energy sources remains ***,single-transition metal atoms anchored onπ-πconjugated two-dimensional(2D)graphitic carbon nitride substrates formπ-d conjugated conductive channels that enhance the overall electrocatalytic ***,firstprinciples calculations were carried out to design and demonstrate a novel macropore graphitic carbon nitride(gC_(10)N_(3))as a promising 2D electrocatalyst substrate to support single-transition metal(TM,from Sc to Au).The"donation-acceptance"charge interaction in the TM-N_(2)moiety effectively balances the adsorption strength of oxygenated intermediates in Ni@g-C_(10)N_(3)and Rh@gC_(10)N_3,making them effective bifunctional OER/ORR electrocatalysts with IrO_(2)/Pt-beyond overpotentials being as low as 0.39/0.38 V and 0.54/0.44 V,***,they possess high stability and conductivity and are less susceptible to oxidation and corrosion under working *** guarantees high activity under ambient ***,the origin of the OER/ORR activity of TM@g-C_(10)N_(3) is explained using multilevel descriptors:intrinsic(p,Bader charge,integral crystal orbital Hamilton population(ICOHP),bond length,and d-band center(εd).In particular,for optimal Ni@g-C_(10)N_(3),the clear hybridization between the Ni-d orbital and surface O-p orbital causes the paired electrons to occupy the bonding *** enables OH~*to be adsorbed on the Ni@g-C_(10)N_(3),thereby achieving the highest catalytic performance.

关键词： First-principles calculation Oxygen evolution reaction Oxygen reduction reaction Bifunctional electrocatalysts Single-metal-atom electrocatalysts

Carbon enhanced nucleophilicity of Na_(3)V_(2)(PO_(4))_(3):A general approach for dendrite-free zinc metal anodes

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Journal of Energy Chemistry 2024年第4期91卷 203-212页

作者： Sijun Wang Lingzi Hu Xiaohui Li Dan Qiu Shunhang Qiu Qiancheng Zhou Wenwen Deng Xiaoying Lu Ze Yang Ming Qiu Ying yu Institute of Nanoscience and Nanotechnology School of Physical Science and TechnologyCentral China Normal UniversityWuhan 430079HubeiChina School of Material Science and Engineering Suzhou University of Science and TechnologySuzhou 215000JiangsuChina Faculty of Science and Technology Technological and Higher Education Institute of Hong KongHong KongChina

Zincophilic property and high electrical conductivity are both very important parameters to design novel Zn anode for aqueous Zn-ion batteries(AZIBs).However,single material is difficult to exhibit zincophilic property and high electrical conductivity at the same ***,originating from theoretical calculation,a zincophilic particle regulation strategy is proposed to address these limitations and carbon coated Na_(3)V_(2)(PO_(4))_(3)is taken as an example to be a protective layer on zinc metal(NVPC@Zn).Na_(3)V_(2)(PO_(4))_(3)(NVP)is a common cathode material for Zn-ion batteries,which is *** materials not only offer an electron pathway to help Zn deposition onto NVPC surface,but also enhance the zinc nucleophilicity of Na_(3)V_(2)(PO_(4))_(3).Hence,this hybrid coating layer can tune zinc deposition and resist side reactions such as hydrogen generation and Zn metal ***,a symmetrical battery with NVPC@Zn electrode displays highly reversible plating/stripping behavior with a long cycle lifespan over 1800 h at2 mA cm^(-2),much better than carbon and Na_(3)V_(2)(PO_(4))_(3)solely modified Zn *** the Na_(3)V_(2)(PO_(4))_(3)is replaced with zincophobic Al2O3or zincophilic V2O3,the stability of the modified zinc anodes is also *** strategy expands the option of zincophilic materials and provides a general and effective way to stabilize the Zn electrode.

关键词： Zinc-ion batteries Zinc anode Carbon enhanced nucleophilicity Zincophilic particle regulation

The Poet in Our Hearts

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中印对话（英文版） 2024年第1期38卷 46-48页

作者： yu Longyu the Center for Indian Studies at Shenzhen University

The 100th anniversary of Rabindranath Tagore's visit to China is highly significant to the history of cultural exchange between China and foreign countries,to modern China-India relations,and to the development of mod... 详细信息

关键词： anniversary India visit

Elucidating the interplay of ferroptosis-related genes in keloid formation:Insights from bioinformatics analysis

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Chinese Journal of Plastic and Reconstructive Surgery 2024年第2期6卷 57-64页

作者： Zikai Qiu Mingzi Zhang Wenchao Zhang Loubin Si Nanze yu Xiaojun Wang Department of Plastic and Reconstructive Surgery Peking Union Medical College HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing100730China

Background:Keloids are benign skin tumors characterized by fibroblast proliferation,tumor-like biological behavior,and excessive deposition of extracellular matrix in wounded ***,a type of programmed cell death,is critical in tumor *** aimed to investigate the role of ferroptosis in keloid ***:We downloaded public high-throughput sequencing raw count data(GSE92566),containing three normal skin and four keloid samples,from the Gene Expression Omnibus ***-related genes were obtained from the Ferroptosis database *** ferroptosis-related differentially expressed genes(FRDEGs)were obtained by merging differentially expressed genes with ferroptosis-related *** FRDEGs were then used for Gene Ontology,Kyoto Encyclopedia of Genes and Genomes,Gene Set Enrichment Analysis,proteinprotein interaction(PPI)network,and microRNA(miRNA)-mRNA network ***,real-time quantitative polymerase chain reaction(RT-qPCR)was performed to validate our ***:We found 25 FRDEGs,including 8 up-regulated and 17 down-regulated *** enrichment analysis revealed that the Hippo and transforming growth factorβsignaling pathways were significantly upregulated in *** contrast,regulation of the peroxisome proliferator-activated receptor signaling pathway,glutathione metabolism,and unsaturated fatty acid metabolic process were *** and FRDEGs hub networks were constructed using the STRING database and Cytoscape *** hub genes were identified,including PLA2G6,RARRES2,SNCA,CYP4F8,CDKN2A,ALOX12,FABP4,ALOX12B,NEDD4,and *** constructed a miRNA-mRNA network,which predicted hsa-mir-155-5p,hsa-let-7b-5p,hsa-mir-124-3p,hsa-mir-145-5p,hsa-mir-328-3p,hsa-mir-24-3p,and hsa-mir-10b-5p as the most connected miRNAs regulating ferroptosis in ***,we verified the expression levels of the hub genes by RT-qPCR,which confirmed that ALOX12,ALOX12B,and CYP4F8 expression were reduced i

关键词： Keloid Ferroptosis Bioinformatics Fatty acid metabolic process

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End of An Em

China Weekly 2024年第1期 32-34页

作者： yu Xiaodong 不详

Chinese officials and scholars bid farewell to Henry Kissinger and the bygone era of stable relations between China and the US that the famous strategist helped to build and sustain.

关键词： officials of stable

China Cultural Center in Sofia Holding the 2nd China-Bulgaria Martial Arts Culture Festival

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China & The World Cultural Exchange 2024年第6期 9-10页

作者： yu Cheng 不详

On April 26,on the occasion of the arrival of the"World Tai Chi Day",the"Bulgaria Youth Cup"-the 2nd China-Bulgaria Martial Arts Culture Festival co-sponsored by China Cultural Center in Sofia,the Bulgarian Ministry of Youth and Sports,and the Bulgarian Martial Arts Association officially kicked off in Sofia,the capital of *** event attracted a total of 17 young martial arts teams all over Bulgaria,with nearly 300 *** two days of intense competition,local Taijiquan experts and professional martial arts judges selected the winners of seven groups,such as Tai Chi and Wing Chun.

关键词： Mart Youth intense