检索结果-南通市图书馆

Development and verification of the higher-order mode neutron flux calculation code HARMONY2.0

在线全文

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2025年第1期36卷 207-225页

作者： Er-Pin Zhang Zi-Ning Ni Nian-Biao Deng Jin-Sen Xie Yong Liu tao yu School of Nuclear Science and Technology University of South ChinaHengyang 421000China Key Laboratory of Advanced Nuclear Energy Design and Safety Ministry of EducationHengyang 421000China Science and Technology on Reactor System Design Technology Laboratory Nuclear Power Institute of ChinaChengdu 610213China

Higher-order modes of the neutron diffusion/transport equation can be used to study the temporal behavior of nuclear reactors and can be applied in modal analysis, transient analysis, and online monitoring of the reactor core. Both the deterministic method and the Monte Carlo(MC) method can be used to solve the higher-order modes. However, MC method, compared to the deterministic method, faces challenges in terms of computational efficiency and α mode calculation stability, whereas the deterministic method encounters issues arising from homogenization-related geometric and energy spectra *** on the higher-order mode diffusion calculation code HARMONY, we developed a new higher-order mode calculation code, HARMONY2.0, which retains the functionality of computing λ and α higher-order modes from HARMONY1.0, but enhances the ability to treat complex geometries and arbitrary energy spectra using the MC-deterministic hybrid two-step strategy. In HARMONY2.0, the mesh homogenized multigroup constants were obtained using OpenMC in the first step,and higher-order modes were then calculated with the mesh homogenized core diffusion model using the implicitly restarted Arnoldi method(IRAM), which was also adopted in the HARMONY1.0 code. In addition, to improve the calculation efficiency, particularly in large higher-order modes, event-driven parallelization/domain decomposition methods are embedded in the HARMONY2.0 code to accelerate the inner iteration of λ∕α mode using OpenMP. Furthermore, the higher-order modes of complex geometric models, such as Hoogenboom and ATR reactors for λ mode and the MUSE-4 experiment facility for the prompt α mode, were computed using diffusion theory.

关键词： Neutron diffusion equation Higher-order modes Global homogenization Two-step method Domain

Wideband high gain millimeter wave antenna based on wavy power divider for millimeter wave radar sensor

在线全文

学校读者我要写书评

暂无评论

The Journal of China Universities of Posts and Telecommunications 2025年

作者： Zhang Shuanggen yu tao Wang yulan Zhou Ran Cheng Zhihua School of Integrated Circuit Science and Engineering， Tianjin University of Technology

In this paper， a broadband high gain millimeter wave radar array antenna based on a wavy power divider is proposed. The radar antenna comprises a wavy power divider and a 10-element array antenna. By adjusting the wavy radius of the power divider， the surface current of the power divider is altered， resulting in better impedance matching with the antenna. This ultimately leads to a significant improvement in bandwidth performance. The 410 millimeter wave radar antenna loaded with wavy power divider exhibits an approximate enhancement of 3 GHz compared to traditional microstrip power divider antennas， and an average gain increase of 2.42 dB within the vehicle millimeter wave radar frequency band relative to the improved gradient power divider structure. The 410 millimeter wave radar antenna loaded with wavy power divider possesses the characteristics of high gain and broad bandwidth.

关键词：

InNi alloy-induced interface effect promoting the parallel electron transfer: improved photothermal catalytic CO2 hydrogenation

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China Chemistry 2025年

作者： Haoyu Zhang yuhang Li yu Nie Xinyu Dou Haodong Ji Xin Tan Jinhua Ye tao yu School of Chemical Engineering and Technology Tianjin University Eco-environment and Resource Efficiency Research Laboratory School of Environment and Energy Peking University Shenzhen Graduate School School of Environmental Science and Engineering Tianjin University Advanced Catalytic Materials Research Center School of Materials Science and Engineering Tianjin University Research Center for Solar Driven Carbon Neutrality Hebei University

Photothermal catalytic CO2hydrogenation is an effective means of utilizing carbon ***,it is severely limited in terms of kinetics and ***,it is necessary to meticulously design catalysts to solve this ***,a sandwich structured NiO@InNi/In2O3is designed to intrinsically regulate the direction of photogenerated carriers transfer,resulting in a CO yield of 42.97 mmol g-1h-1(1290.3μmol h-1) with a selectivity near to 100%.InNi alloy favors the collection of photogenerated carriers by the parallel way and enhancement of the adsorption and activation of *** grown on the surface of InNi alloy not only improves the adsorption of H2and provides sufficient H+for the reaction,but also makes InNi alloy more stable during the reaction *** photothermal effect caused by In2O3accelerates the transfer of photogenerated carriers and increases the surface temperature of the catalyst,thereby synergistically promoting the reaction from a kinetic *** work ameliorates the kinetic and thermodynamic limitations of the photothermal catalytic CO2hydrogenation process through rationally designing the electron transfer direction of the sandwich structured catalysts to parallel way.

关键词：

Small modifications of endo-functionalized cavities lead to large changes in molecular interaction in water

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China Chemistry 2025年第1期68卷 369-376页

作者： Song-Meng Wang Hao Nian Yan-Fang Wang Li-Shuo Zheng yu-tao Zheng Yi-Wei Dong Liping Huang Xiaoping Wang Wei Jiang Liu-Pan Yang Department of Chemistry Southern University of Science and TechnologyShenzhen 518055China School of Pharmaceutical Science Hengyang Medical SchoolUniversity of South ChinaHengyang 421001China School of Chemistry and Pharmaceutical Sciences State Key Laboratory for Chemistry and Molecular Engineering of Medicinal ResourcesGuangxi Normal UniversityGuilin 541004China

Studying molecular recognition in aqueous environments is crucial for understanding biological ***,we present a series of N-doped endo-functionalized anthracene-based cavities by introducing inward-directed pyridine *** subtle modifications can significantly affect the binding properties of these receptors,which is similar to the mutations in biological *** theoretical calculations and molecular recognition experiments demonstrated that these“mutations”have an impact on the hydrophobicity and charge distribution of the hosts,consequently significantly influencing molecular *** is crucial for understanding the intricate mechanisms of molecular-level interactions in biological receptors.

关键词： host-guest interaction hydrophobic effect endo-functionalized cavity mutation pyridine

行政执法意义上公法规范域外适用制度的逻辑展开

在线全文

学校读者我要写书评

暂无评论

东南大学学报(哲学社会科学版) 2025年第01期27卷 84-94+151页

作者：余涛东南大学法学院

在行政执法意义上，公法规范域外适用的一般逻辑尚未被学界所重点研究。公法规范域外适用制度的主要特征是贯彻国家意志并伴以利益衡量。公法规范域外适用的步骤是先判断行政机关有无域外执法管辖权，再判断行政机关是否应当启动域外执... 详细信息

在行政执法意义上，公法规范域外适用的一般逻辑尚未被学界所重点研究。公法规范域外适用制度的主要特征是贯彻国家意志并伴以利益衡量。公法规范域外适用的步骤是先判断行政机关有无域外执法管辖权，再判断行政机关是否应当启动域外执法管辖权，最后是实体性公法规范的适用。判断行政机关有无域外执法管辖权的标准是看特定的公法法典中是否规定了域外执法管辖权规范，如果有规定，则行政机关享有域外执法管辖权，反之则否。理性人标准是判断行政机关应否启动域外执法管辖权的一般标准。在实体性公法规范的域外适用环节，行政机关应从构成要件的符合性和有责性两方面对域外对象进行双层审查；通过双层审查后，行政机关还应对处罚的必要性和可行性进行判断。

关键词：公法规范域外适用理性人行政执法

Molecular mechanism of pancreatic ductal adenocarcinoma:The heterogeneity of cancer-associated fibroblasts and key signaling pathways

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Oncology 2025年第2期16卷 18-28页

作者： Zhong-yuan Hu Ding Ding yu Song Ya-Feng Deng Cheng-Ming Zhang tao yu First School of Clinical Medicine Shaanxi University of Chinese MedicineXianyang 712000Shaanxi ProvinceChina College of Acupuncture and Massage Shaanxi University of Chinese MedicineXianyang 712000Shaanxi ProvinceChina Graduate School Guangzhou University of Chinese MedicineGuangzhou 510000Guangdong ProvinceChina Digestive Department I Shaanxi Provincial Hospital of Traditional Chinese MedicineXi’an 710000Shaanxi ProvinceChina

Pancreatic ductal adenocarcinoma stands out as an exceptionally fatal cancer owing to the complexities associated with its treatment and diagnosis,leading to a notably low five-year survival *** study offers a detailed exploration of epidemiological trends in pancreatic cancer and key molecular drivers,such as mutations in CDKN2A,KRAS,SMAD4,and TP53,along with the influence of cancer-associated fibroblasts(CAFs)on disease *** particular,we focused on the pivotal roles of signaling pathways such as the transforming growth factor-βand Wnt/β-catenin pathways in the development of pancreatic cancer and investigated their application in emerging therapeutic *** study provides new scientific perspectives on pancreatic cancer treatment,especially in the development of precision medicine and targeted therapeutic strategies,and demonstrates the importance of signaling pathway research in the development of effective therapeutic *** studies should explore the subtypes of CAFs and their specific roles in the tumor microenvironment to devise more effective therapeutic methods.

关键词： Pancreatic cancer Fibroblasts Signaling pathways Tumor microenvironment

“螺旋转译”渐进式更新机制研究——以南京荷花塘历史文化街区为例

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

城市规划 2025年第1期49卷 69-78页

作者：袁雨龙于涛南京大学建筑与城市规划学院南京大学建筑与城市规划学院城市与区域规划系中国城市规划学会城乡治理与政策研究专业委员会

“小规模、渐进式”更新模式逐渐成为当今城市更新理论与实践的主流。探讨行动者网络理论的“螺旋转译”理念,指出渐进式更新有螺旋上升之义,应呼应网络变化动态调整规划。调研南京荷花塘历史文化街区,通过访谈梳理街区更新的行动者类... 详细信息

“小规模、渐进式”更新模式逐渐成为当今城市更新理论与实践的主流。探讨行动者网络理论的“螺旋转译”理念,指出渐进式更新有螺旋上升之义,应呼应网络变化动态调整规划。调研南京荷花塘历史文化街区,通过访谈梳理街区更新的行动者类型和目标,构建行动者网络,发现其“螺旋转译”过程存在导致更新规划难以实施落地的问题。最后,根据荷花塘“螺旋转译”渐进式更新机制提出优化策略,以期推动更新规划的理念创新与进步。

关键词：螺旋转译渐进式更新行动者网络历史文化街区南京荷花塘

平面集成TVS二极管对半导体桥火工品换能元性能的影响因素

在线全文

学校读者我要写书评

暂无评论

含能材料 2025年第1期33卷 73-81页

作者：陶禹任王磊周彬王军南京理工大学化学与化工学院江苏南京210094

为探究平面集成瞬态抑制二极管(TVS)对半导体桥(SCB)火工品换能元性能的影响因素以及规律,通过电容放电发火实验,研究了平面集成TVS二极管的并联数量与击穿电压对半导体桥火工品换能元的电爆性能的影响,并通过500 pF/500Ω/25 kV静电放... 详细信息

为探究平面集成瞬态抑制二极管(TVS)对半导体桥(SCB)火工品换能元性能的影响因素以及规律,通过电容放电发火实验,研究了平面集成TVS二极管的并联数量与击穿电压对半导体桥火工品换能元的电爆性能的影响,并通过500 pF/500Ω/25 kV静电放电实验,研究了其对半导体桥火工品换能元的静电可靠性能的影响。结果表明,当激励能量使单个平面集成TVS二极管单位时间吸收的能量接近上限时,增加平面集成TVS二极管并联数量会延长SCB火工品换能元的爆发时间,影响SCB火工品换能元正常爆发,反之,若激励能量不足以使单个平面集成TVS二极管单位时间吸收的能量接近其上限,则SCB火工品换能元爆发性能不会随并联平面集成TVS二极管的数量变化而变化;当激励电压大于平面集成TVS二极管的击穿电压时,TVS二极管击穿电压越低,SCB火工品换能元的爆发时间越长,爆发能量越大,甚至影响SCB火工品换能元正常爆发;降低平面集成TVS二极管的击穿电压、增加并联数量都能够提高SCB火工品换能元的静电可靠性能;设计桥区尺寸为350μm(W)×100μm(L)×2μm(H)的抗静电集成半导体桥芯片时可以集成两个击穿电压略低于14 V或一个击穿电压略高于7 V的TVS二极管。

关键词：抗静电集成半导体桥芯片火工品 TVS二极管电爆性能

电力市场环境下超大城市虚拟电厂的建设理念与创新实践

在线全文

学校读者我要写书评

暂无评论

电网技术 2025年第1期49卷 103-112,I0050页

作者：汤军高洪超余涛康重庆国网上海市电力公司上海市浦东新区200122 新型电力系统运行与控制全国重点实验室(清华大学) 北京市海淀区100084

随着新型电力系统加快构建,虚拟电厂(virtual power plant,VPP)作为新型能源体系中的关键组成,为电力系统安全保供和节能降碳提供了重要支撑。然而,虚拟电厂的技术形态和应用场景愈发多元,规模化发展存在标准化制约,及时总结和归纳虚拟... 详细信息

随着新型电力系统加快构建,虚拟电厂(virtual power plant,VPP)作为新型能源体系中的关键组成,为电力系统安全保供和节能降碳提供了重要支撑。然而,虚拟电厂的技术形态和应用场景愈发多元,规模化发展存在标准化制约,及时总结和归纳虚拟电厂的发展理念、建设路径和技术实践,将有利于推动技术协同和行业发展。鉴于此,该文以超大城市虚拟电厂为典型用例,首先从形式、政策、市场以及标准4个方面进行归纳梳理,详细讨论了虚拟电厂顶层设计理念。其次,从精准响应、区域协同、快速调频3个维度探究了虚拟电厂多时空调控技术体系,支持上海虚拟电厂常态化运营。然后,介绍了上海市VPP规模化示范应用成效,可为超大城市级虚拟电厂的发展建设和创新实践提供参考。最后,通过对上海市虚拟电厂建设运营前景分析,凝练出其发展路径。

关键词：虚拟电厂超大城市顶层设计发展路径创新实践