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铁路隧道TBM施工物料运输方式对比分析

隧道建设（中英文） 2024年第5期44卷 1077-1085页

作者：齐梦学曾绍毅杨庆辉刘卓郭志龙中铁十八局集团隧道工程有限公司重庆400700 中铁十八局集团有限公司天津300222

为便于选择TBM施工物料运输方式,以铁路隧道为工程背景,首先,简要总结有轨运输和无轨运输2种运输方式的特点及其工程应用情况;然后,根据施工实践拟定典型工况,研究典型工况下的运输方案及设备配置,并从设备配置和工期2个方面对有轨运输... 详细信息

为便于选择TBM施工物料运输方式,以铁路隧道为工程背景,首先,简要总结有轨运输和无轨运输2种运输方式的特点及其工程应用情况;然后,根据施工实践拟定典型工况,研究典型工况下的运输方案及设备配置,并从设备配置和工期2个方面对有轨运输和无轨运输进行详细对比分析。研究结果表明:1)有轨运输和无轨运输在铁路隧道TBM施工中技术上都是可行的,总工期无明显差异。2)我国配合TBM施工的内燃机车质量明显不高且突破难度较大,应努力提升电动机车的工程适应性、可靠性、耐久性以及人性化设计;同时,需要规范有轨运输设备配置要求、轨道铺设和维护质量,以提升有轨运输的效率。3)需要研究适合TBM施工工况且成本低、通用性好的无轨运输设备。

关键词：铁路隧道 TBM 物料运输有轨运输无轨运输

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我国对外文化传播能力提升论略

新疆社会科学 2022年第1期 121-129,148页

作者：张秉福齐梦雪山东科技大学公共课教学部山东泰安271021 淄博矿业集团有限责任公司党校山东淄博255120

提升我国对外文化传播能力,能够增强中华文化的国际影响力,塑造我国良好的国际形象,坚定我国民众的文化自信,促进世界文化繁荣发展。然而,我国的对外文化传播能力建设还存在主体职责不清、内容结构失衡、渠道效能不高、受众分析不足等... 详细信息

提升我国对外文化传播能力,能够增强中华文化的国际影响力,塑造我国良好的国际形象,坚定我国民众的文化自信,促进世界文化繁荣发展。然而,我国的对外文化传播能力建设还存在主体职责不清、内容结构失衡、渠道效能不高、受众分析不足等突出问题。文章认为,为有效改进和创新对外文化传播实践,应当明晰传播职责,保障对外文化传播供给;调整传播内容,优化对外文化传播结构;拓宽传播渠道,提升对外文化传播效能;深化受众分析,更好满足海外受众文化需求。

关键词：对外文化传播能力意义问题对策

基于网络结构约简的配电网多日负荷曲线聚类方法

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电力系统自动化 2023年第5期47卷 35-43页

作者：祁梦雪梅林珏昊李知艺辛焕海浙江大学电气工程学院浙江省杭州市310027

新型电力系统背景下,配电网末梢负荷波动态势复杂,负荷曲线聚类是简化负荷波动特性分析的有效手段。针对配电网末梢负荷,主流的单日负荷曲线聚类忽略了日间波动的差异性,而采用多日负荷曲线难以达到理想的聚类效果。鉴于此,提出一种基... 详细信息

新型电力系统背景下,配电网末梢负荷波动态势复杂,负荷曲线聚类是简化负荷波动特性分析的有效手段。针对配电网末梢负荷,主流的单日负荷曲线聚类忽略了日间波动的差异性,而采用多日负荷曲线难以达到理想的聚类效果。鉴于此,提出一种基于网络结构约简理念的多日负荷曲线聚类新思路。首先,通过水平可视图方法生成聚类用户的负荷时间序列多层伴生网络;其次,针对所建立多层伴生网络的结构冗余性进行评估并对相似层进行聚合;最后从趋势效果、波动态势和社会属性3个方面对多日负荷曲线聚类结果进行可解释性分析。算例实验表明,相比于主流聚类方法,该方法能够高效处理多日配电网末梢负荷曲线聚类问题,且具有聚类过程免调参、聚类结果可解释性强等优势。

关键词：配电网负荷曲线聚类网络结构约简

Recent advances in multifunctional shape memory photonic crystals and practical applications

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Nano Research 2024年第1期17卷 79-96页

作者： Yong qi Shufen Zhang State Key Laboratory of Fine Chemicals Frontier Science Center for Smart MaterialsDalian University of TechnologyDalian 116024China

Shape memory photonic crystals(SMPCs)are smart composite materials with changeable structural color integrated by shape memory polymer and photonic *** can produce one or more temporary shapes through nanoscale deformation,memorizing current *** can be recovered to their original shapes or some intermediate states under external stimuli,accompanied by the variation of structural *** porous carriers with built-in sensing properties,SMPCs promoted the interdisciplinary development of nanophotonic technology in materials science,environmental engineering,biomedicine,chemical engineering,and ***,the recent progress on multifunctional SMPCs and practical applications,including traditional and cold programmable SMPCs,is summarized and *** primary concern is shape programming at the nanoscale that has demonstrated numerous attractive functions,including smart sensing,ink-free printing,solvent detection,reprogrammable gradient wetting,and controllable bubble transportation,under variations of the surface *** aims to figure out the nanoscale shape memory effects on structural color conversion and additional performance,inspiring the fabrication of the next generation of ***,perspectives on future research directions and applications are also *** is believed that multifunctional SMPCs are powerful nanophotonic tools for the interdisciplinary development of numerous disciplines in the future.

关键词： photonic crystal shape memory structural color cold programmable shape recovery

Geometric Constraints for Global Regularity of 3D Shear Thickening Fluids

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Acta Mathematicae Applicatae Sinica 2024年第1期40卷 205-210页

作者： Jia-qi Yang Research&Development Institute of Northwestern Polytechnical University in Shenzhen Shenzhen518063China Key Laboratory for Mechanics in Fluid Solid Coupling Systems Institute of MechanicsChinese Academy of SciencesBeijing100190China

We consider the relation between the direction of the vorticity and the global regularity of 3D shear thickening *** is showed that a weak solution to the non-Newtonian incompressible fluid in the whole space is stron... 详细信息

关键词： direction of the vorticity non-Newtonian fluid global regularity

Understanding the spatial interaction of ultrasounds based on three-dimensional dual-frequency ultrasonic field numerical simulation

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China Foundry 2024年第1期21卷 29-43页

作者： Zhao-yang Yin qi-chi Le Yan-chao Jiang Da-zhi Zhao qi-yu Liao qi Zou Key Lab of Electromagnetic Processing of Materials Ministry of EducationNortheastern UniversityShenyang 110819China School of Materials Science and Engineering Northeastern UniversityShenyang 110819China

A transient 3D model was established to investigate the effect of spatial interaction of ultrasounds on the dual-frequency ultrasonic field in magnesium alloy *** effects of insertion depth and tip shape of the ultrasonic rods,input pressures and their ratio on the acoustic field distribution were discussed in ***,the spacing,angle,and insertion depth of two ultrasonic rods significantly affect the interaction between distinct *** a result,various acoustic pressure distributions and cavitation regions are *** spherical rods mitigate the longitudinal and transversal attenuation of acoustic pressure and expand the cavitation volume by 53.7%and 31.7%,respectively,compared to the plate and conical *** the input pressure will enlarge the cavitation region but has no effect on the acoustic pressure distribution *** acoustic pressure ratio significantly affects the pressure distribution and the cavitation region,and the best cavitation effect is obtained at the ratio of 2:1(P15:P20).

关键词： dual-frequency ultrasonic numerical model acoustic pressure spatial interaction magnesium alloy

Adaptive sampling for corrugated plate digitization using a laser displacement sensor

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Science China(Technological Sciences) 2024年第5期67卷 1510-1523页

作者： WU ChengXing qi qi CHEN BaiJin YANG JiXiang DING Han State Key Laboratory of Intelligent Manufacturing Equipment and Technology School of Mechanical Science and EngineeringHuazhong University of Science and TechnologyWuhan430074China State Key Laboratory of Intelligent Manufacturing Equipment and Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan430074China

The surface quality of a corrugated plate directly determines the heat transfer property of the thermal power mechanical *** detection methods are impractical for real-world production,being slow and *** contrast,the point laser displacement sensor,employing the optical triangle method,emerges as a promising device for assessing parts with variable curvature and highly reflective *** its benefits,high-density sampling by an innate frequency introduces challenges such as data redundancy and a poor signal-to-noise ratio,potentially affecting the efficiency and precision of subsequent data *** address these challenges,adjustable frequency data sampling has been developed for this sensor,allowing adaptive sampling for corrugated plate *** process begins with surface digitization to extract discrete points,which are transformed into intersection curves using the B-spline fitting ***,dominant points are identified,considering multigeometric constraints for curvature and arch ***,the sampling signal is adjusted based on the distribution information of dominant *** results indicate that the proposed method effectively minimizes redundant sampling without compromising the accurate capture of essential geometric features.

关键词： corrugated plate laser displacement sensor adaptive sampling dominant point curvature arch height

Cosmological Constraints on Neutrino Masses in Light of JWST Red and Massive Candidate Galaxies

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Research in Astronomy and Astrophysics 2024年第4期24卷 7-12页

作者： Jian-qi Liu Zhi-qi Huang Yan Su School of Physics and Astronomy Sun Yat-sen UniversityZhuhai 519082China CSST Science Center for the Guangdong-Hong Kong-Macao Greater Bay Area Zhuhai 519082China

The overabundance of the red and massive candidate galaxies observed by the James Webb Space Telescope(JWST)implies efficient structure formation or large star formation efficiency at high redshift z~*** the scenario of a low or moderate star formation efficiency,because massive neutrinos tend to suppress the growth of structure of the universe,the JWST observation tightens the upper bound of the neutrino *** A cold dark matter cosmology and a star formation efficiency∈[0.05,0.3](flat prior),we perform joint analyses of Planck+JWST and Planck+BAO+JWST,and obtain improved constraints∑m_(ν)<0.196 eV and ∑m_(ν)+<0.111 eV at 95% confidence level,*** on the above assumptions,the inverted mass ordering,which implies ∑m_(ν)≥0.1 eV,is excluded by Planck+BAO+JWST at 92.7% confidence level.

关键词： (cosmology:)cosmological parameters galaxies:abundances galaxies:formation neutrinos

Transcriptome Analysis of Heterosis in Survival in the Hybrid Progenies of‘Haida No.1’and Orange-Shelled Lines of the Pacific Oyster Crassostrea gigas

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Journal of Ocean University of China 2024年第1期23卷 199-208页

作者： YANG Hang LI qi Key Laboratory of Mariculture Ministry of EducationOcean University of ChinaQingdao 266003China

Heterosis has been exploited to enhance the yield and adaptability in various shellfish species;however,the molecular basis of it remains *** Pacific oyster Crassostrea gigas is one of the most economically important aquaculture species,and its productive traits can be improved by ***,an intraspecific cross between orange shell(O,10th generation)and‘Haida No.1’(H,13th generation)of *** was performed to assess the heterosis of survival *** rates of hybrid family(OH)and inbred families(HH and OO)were compared at larval stage,and eyed-pediveliger larvae of three families were subjected to transcriptome *** analysis results of best-parent heterosis and mid-parent heterosis showed that the hybrid family exhi-bited a high heterosis in survival relative to the parental *** OH-M(OH ***)and OH-P(OH ***)had 425 and 512 dif-ferentially expressed genes(DEGs),*** enrichment analysis of these DEGs revealed that the significantly enrich-ed genes function in virion binding,C-type lectin receptor signaling pathway,cellular defense response and other immune-related pro-cesses,which involves perlucin-like protein,CD209 antigen-like protein,ZNFX1,caspase-3 and acan *** differentially ex-pressed genes in OH-M and OH-P,together with the immune-related processes mentioned above may play an important role in the larval survival of *** addition,three genes(CYP450,fucolectin and perlucin-like)are associated with the orange shell and low survival of maternal oyster *** findings provide support for the application of hybrid with superior survival and will facilitate the understanding of heterosis formation in the Pacific oyster.

关键词： Crassostrea gigas survival rate heterosis transcriptome