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Multi-objective Optimization of Co-cured Composite Laminates with Embedded Viscoelastic Damping Layer

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Journal of Materials Science & Technology 2009年第5期25卷 708-712页

作者： lijian pan boming zhang Fuhong Dai Centre for Composite Materials and Structure Harbin Institute of Technology Harbin 150080 China

Presented herein is a methodology for the multi-objective optimization of damping and bending stiffness of cocoured composite laminates with embedded viscoelastic damping layer. The embedded viscoelastic damping layer is perforated with a series of small holes, and the ratio of the perforation area to the total damping area is the design variable of the methodology. The multi-objective optimization is converted into a single-objective problem by an evaluation function which is a liner weigh sum of the two sub-objective functions. The proposed methodology was carried out to determine the optimal perforation area ratios of two viscoelstic layers with different perforation distance embedded in two composite plates. Both the optimal perforation area ratios are approximate to 2.2%. However, the objective value of the plate with greater perforation distance in embedded viscoelatic layer is much greater.

关键词： Composite laminates Viscoelastic damping layer Co-cured Multi-objective optimization

预氧化处理对12Cr铁素体/马氏体钢耐Pb-Bi腐蚀性能的影响

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金属学报 2024年第5期60卷 639-649页

作者：潘霞张洋鹏董志宏陈胜虎姜海昌戎利建中国科学院金属研究所沈阳110016 中国科学技术大学材料科学与工程学院沈阳110016 中国科学院金属研究所中国科学院核用材料与安全评价重点实验室沈阳110016

针对液态Pb-Bi共晶(LBE)冷却快堆开发了一种新型高硅12Cr铁素体/马氏体钢,为进一步增强其耐Pb-Bi腐蚀性能,提升燃料组件的安全性,采用预氧化法对其进行了表面防护处理,表征了预氧化膜的结构,分析了预氧化处理对12Cr铁素体/马氏体钢耐55... 详细信息

针对液态Pb-Bi共晶(LBE)冷却快堆开发了一种新型高硅12Cr铁素体/马氏体钢,为进一步增强其耐Pb-Bi腐蚀性能,提升燃料组件的安全性,采用预氧化法对其进行了表面防护处理,表征了预氧化膜的结构,分析了预氧化处理对12Cr铁素体/马氏体钢耐550℃饱和氧LBE的腐蚀性能的影响。结果表明,该钢在720℃、1%O_(2)+99%N_(2)气氛中预氧化1 h时形成的氧化膜主要是(Fe,Cr)_(2)O_(3)和MnCr_(2)O_(4)氧化物,此氧化膜可有效阻止钢中Fe元素的向外扩散和LBE中O元素的向内扩散,进而提升了材料的耐LBE腐蚀性能。但由于Mn较高的扩散速率和在LBE中较高的溶解度,预氧化膜中的Mn元素会逐渐扩散和溶解至LBE,导致部分氧化膜失效并形成局部腐蚀区,当LBE腐蚀1000 h后,合金表面的局部腐蚀区可达60%。本工作揭示了新型高硅12Cr铁素体/马氏体钢中预氧化膜的微观结构、保护效果和失效机制,为进一步提升其预氧化膜的有效性和稳定性指明了方向。

关键词： Pb-Bi共晶冷却快堆铁素体/马氏体钢表面处理 Pb-Bi腐蚀预氧化膜

Recent progress of radionuclides separation by porous materials

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Science China Chemistry 2024年

作者： Yinghui Xie Long Yu Long Chen Cheng Chen Li Wang Fenglei Liu Yun Liao Peng zhang Tao Chen Yihui Yuan Yuexiang Lu Boyang Huang Hui Yang Suhua Wang Shuao Wang lijian Ma Feng Luo Yunhai Liu Baowei Hu Hongqing Wang Duoqiang pan Wenkun Zhu Ning Wang Zhe Wang Liang Mao Shengqian Ma Xiangke Wang State Key Laboratory of Marine Resource Utilization in South China Sea Collaborative Innovation Center of Marine Science and Technology Hainan University Institute of Nuclear and New Energy Technology Tsinghua University State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Department of Chemistry University of North TexasDenton Guangdong Provincial Key Laboratory for Green Agricultural Production and Intelligent Equipment School of Environmental Science and Engineering Guangdong University of Petrochemical Technology School of Life Science Shaoxing University College of Environmental Science and Engineering North China Electric Power University State Key Laboratory of Radiation Medicine and Protection School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions Soochow University College of Chemistry Sichuan University School of Chemistry and Materials Science East China University of Technology School of Chemistry and Chemical Engineering University of South China Frontiers Science Center for Rare Isotopes Lanzhou University State Key Laboratory of Environment-friendly Energy Materials National Co-innovation Center for Nuclear Waste Disposal and Environmental Safety Sichuan Civil-military Integration Institute School of National Defence & Nuclear Science and TechnologySouthwest University of Science and Technology

The separation of radionuclides is critical for the sustainable development of nuclear energy. It is urgent to design and prepare functionalized materials for efficient radionuclides separation. Porous materials are considered excellent candidates for the separation of radionuclides under complex conditions due to their high specific surface areas, tunable pore structures and controllable functionalities. In this review, we summarized the design, preparation and functionalization of porous materials and their application for separation of radionuclides in the past five years, discussed the separation performance and analyzed the structure-activity relationship between various radionuclides and porous materials, and systematically clarified their characterization and mechanism of different type porous materials. We also introduced the detection, irradiation and chemical toxicity of different reflective radionuclides.

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黏弹阻尼层共固化复合材料不同温度下的阻尼性能

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复合材料学报 2008年第1期25卷 168-172页

作者：潘利剑张博明戴福洪哈尔滨工业大学复合材料与结构研究所哈尔滨150006

采用共固化工艺制备了以丁腈橡胶为黏弹性阻尼层的复合材料,应用动态机械分析仪(DMA)测定了该材料损耗因子的温度谱,并对不同温度环境下该材料的阻尼性能和阻尼机制进行了分析。结果表明:当温度处于阻尼层玻璃态和高弹态区时,共固化复... 详细信息

采用共固化工艺制备了以丁腈橡胶为黏弹性阻尼层的复合材料,应用动态机械分析仪(DMA)测定了该材料损耗因子的温度谱,并对不同温度环境下该材料的阻尼性能和阻尼机制进行了分析。结果表明:当温度处于阻尼层玻璃态和高弹态区时,共固化复合材料损耗因子较小且随温度变化不大;当温度处于阻尼层黏流态区时,共固化复合材料的损耗因子迅速增加到最大值后变小,最大损耗因子为19.2%,约为未插入黏弹阻尼层复合材料的13倍;共固化过程中阻尼层损耗因子的减小,使共固化复合材料的阻尼性能降低,并在阻尼层的黏流态区其损耗因子明显小于预报结果;界面阻尼的影响提高了共固化复合材料的阻尼性能,并在阻尼层的玻璃态区其损耗因子大于预报结果。

关键词：复合材料黏弹阻尼层损耗因子共固化

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能量管理系统中在线动态安全评估的研究

清华大学学报（自然科学版） 1999年第3期39卷 45-48页

作者：潘志宏张伯明张毅威清华大学电机工程与应用电子技术系

在线动态安全评估是能量管理系统（ＥＭＳ）中的重要功能，文章在ＥＭＳ中实现了一种实用的快速在线暂稳分析方法，通过在广西系统中实际运行证明，结合时域仿真法和直接法的综合法是一种可行的在线动态安全评估方法。分析和改进了预估... 详细信息

在线动态安全评估是能量管理系统（ＥＭＳ）中的重要功能，文章在ＥＭＳ中实现了一种实用的快速在线暂稳分析方法，通过在广西系统中实际运行证明，结合时域仿真法和直接法的综合法是一种可行的在线动态安全评估方法。分析和改进了预估－校正法，保证暂稳分析方法在多重多时段复杂故障下的快速性和准确性。设计了考虑电力系统复杂模型的在线动态安全评估系统的基本结构和功能，指出时域仿真法是在复杂模型下进行动态安全评估不可缺少的高精度决策工具。

关键词：能量管理系统动态安全评估 TSA 电力系统 EMS

RePhine: An Integrative Method for Identification of Drug Response-related Transcriptional Regulators

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Genomics, Proteomics & Bioinformatics 2021年第4期19卷 534-548页

作者： Xujun Wang Zhengtao zhang Wenyi Qin Shiyi Liu Cong Liu Georgi ZGenchev lijian Hui Hongyu Zhao Hui Lu SJTU-Yale Joint Center for Biostatistics and Data Science Department of Bioinformatics and BiostatisticsSchool of Life Science and BiotechnologyShanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of Cell Biology CAS Center for Excellence in Molecular Cell ScienceShanghai Institute of Biochemistry and Cell BiologyShanghai 200031China Department of Bioengineering University of Illinois at ChicagoIL 60607USA Department of Genetics School of MedicineYale UniversityNew HavenCT 06511USA Department of Medical Informatics Columbia UniversityNew YorkNY 10032USA Bulgarian Institute for Genomics and Precision Medicine Sofia 1000Bulgaria Department of Biostatistics Yale School of Public Health.New HavenCT 06511USA Institute of Science and Technology for Brain-Inspired Intelligence Fudan UniversityShanghai 200433China Center for Biomedical informatics Shanghai Children’s HospitalShanghai 200040China

Transcriptional regulators(TRs)participate in essential processes in cancer pathogenesis and are critical therapeutic *** of drug response-related TRs from cell line-based compound screening data is often challenging due to low m RNA abundance of TRs,protein modifications,and other confounders(CFs).In this study,we developed a regression-based pharmacogenomic and Ch IP-seq data integration method(Re Phine)to infer the impact of TRs on drug response through integrative analyses of pharmacogenomic and Ch IP-seq *** Phine was evaluated in simulation and pharmacogenomic data and was applied to pan-cancer datasets with the goal of biological *** simulation data with added noises or CFs and in pharmacogenomic data,Re Phine demonstrated an improved performance in comparison with three commonly used methods(including Pearson correlation analysis,logistic regression model,and gene set enrichment analysis).Utilizing Re Phine and Cancer Cell Line Encyclopedia data,we observed that Re Phinederived TR signatures could effectively cluster drugs with different mechanisms of *** Phine predicted that loss-offunction of EZH2/PRC2 reduces cancer cell sensitivity toward the BRAF inhibitor *** validation confirmed that pharmacological EZH2 inhibition increases the resistance of cancer cells to PLX4720 *** results support that Re Phine is a useful tool for inferring drug response-related TRs and for potential therapeutic *** source code for Re Phine is freely available at https://***/coexps/Re Phine.

关键词： Pharmacogenomics ChIP-seq Transcriptional regulator BRAF inhibitor resistance Drug resistance

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分布计算的遗传算法在无功优化中的应用

电力系统自动化 2001年第12期25卷 37-41页

作者：潘哲龙张伯明孙宏斌程亮清华大学电机系北京100084 南通供电局江苏南通226006

为了快速有效地求解电力系统无功优化问题 ,提出了一种分布式并行计算的遗传算法。它采用主从方式来组织局域网内的多台机器进行并行计算——由 1台主机进行选择和遗传操作 ,并根据负荷均衡的原则调度多台从机计算潮流以给出个体适应值... 详细信息

为了快速有效地求解电力系统无功优化问题 ,提出了一种分布式并行计算的遗传算法。它采用主从方式来组织局域网内的多台机器进行并行计算——由 1台主机进行选择和遗传操作 ,并根据负荷均衡的原则调度多台从机计算潮流以给出个体适应值。根据无功优化的特点 ,为了增加算法并行度 ,就编码方案、基于多目标函数的适应度求解和遗传操作等方面对遗传算法进行了详尽的设计。文中还着重分析了并行处理效率的相关问题。算例表明该方法不仅取得了较好的优化效果。

关键词：并行计算遗传算法无功优化分布计算电力系统

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基于可信性理论的模糊潮流方法

电力系统自动化 2007年第17期31卷 21-25页

作者：汪皓吴文传张伯明潘坚跃清华大学电机系电力系统国家重点实验室北京市100084 杭州电力局浙江省杭州市310009

目前的模糊潮流算法基于模糊集理论,但需要严格的数学理论基础和测试标准。可信性理论是研究模糊现象的数学分支,它建立了与概率论相对应的模糊论公理化体系。基于可信性理论提出一种通用模糊潮流算法,该算法不仅能够给出潮流结果的可... 详细信息

目前的模糊潮流算法基于模糊集理论,但需要严格的数学理论基础和测试标准。可信性理论是研究模糊现象的数学分支,它建立了与概率论相对应的模糊论公理化体系。基于可信性理论提出一种通用模糊潮流算法,该算法不仅能够给出潮流结果的可能性分布及其期望值和方差等数字指标,而且能够统计设备越限期望值和系统风险值。一方面,该方法使得模糊潮流的计算结果能进行直观的分析比较,提高了实用性;另一方面,该方法具有严格的数学基础,所以可以成为模糊潮流的测试标准。以6节点系统和某实际地区电网的算例表明了所提出的方法的合理性和有效性。

关键词：模糊潮流可信性理论模糊模拟

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DTS中动态实时仿真研究

电力系统自动化 2000年第10期24卷 5-8,13页

作者：戴仁昶潘哲龙孙宏斌张毅威张伯明清华大学电机系北京100084

为提高调度员培训仿真器 ( DTS)中动态仿真的实时性 ,对动态仿真程序的各个环节进行了实时性改进 ,针对地调 DTS动态仿真的特点 ,提出了故障操作 -继电保护 -故障操作的动态仿真方式 ,对实际系统的算例表明所提方法的有效性。

关键词：调度员培训仿真器实时仿真电力系统 DTS