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Design and optimization of quadrupole and sextupole magnets for Shenzhen Innovation Light-source Facility storage ring
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作者 Zhu Jiawu Zhang Miao Wang Yong 《强激光与粒子束》 北大核心 2025年第7期83-90,共8页
As an advanced 4^(th) generation synchrotron radiation facility,the Shenzhen Innovation Light-source Facility(SILF)storage ring is based on multi-bend achromat(MBA)lattices,enabling one to two orders of magnitude redu... As an advanced 4^(th) generation synchrotron radiation facility,the Shenzhen Innovation Light-source Facility(SILF)storage ring is based on multi-bend achromat(MBA)lattices,enabling one to two orders of magnitude reduction in beam emittance compared to the 3^(rd) generation storage ring.This significantly enhance the radiation brightness and coherence.The multipole magnets of many types for SILF storage ring are under preliminary design,which require high integral field homogeneity.As a result,a dedicated pole tip optimization procedure with high efficiency is developed for quadrupole and sextupole magnets with Opera-2D^(■)python script.The procedure considers also the 3D field effect which makes the optimization more straightforward.In this paper,the design of the quadrupole and sextupole magnets for SILF storage ring is first presented,followed by a detailed description of the implemented pole shape optimization method. 展开更多
关键词 synchrotron radiation facility quadrupole magnet sextupole magnet pole shape optimization
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Approximation Algorithms for the Priority Facility Location Problem with Penalties 被引量:2
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作者 WANG Fengmin XU Dachuan WU Chenchen 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2015年第5期1102-1114,共13页
develop a mentation This paper considers the priority facility primal-dual 3-approximation algorithm for procedure, the authors further improve the location problem with penalties: The authors this problem. Combining... develop a mentation This paper considers the priority facility primal-dual 3-approximation algorithm for procedure, the authors further improve the location problem with penalties: The authors this problem. Combining with the greedy aug- previous ratio 3 to 1.8526. 展开更多
关键词 Approximation algorithm facility location problem greedy augmentation PRIMAL-DUAL
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Fuzzy-AHP-Based Comprehensive Evaluation on Facility Management System of High-Rise Office Buildings 被引量:2
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作者 ZHANG Peihong,WANG Kan,WAN Huanhuan,MA Zhongjiao(School of Environment Engineering,Shenyang Jianzhu University,Shenyang,China,110168) 《沈阳建筑大学学报(自然科学版)》 CAS 北大核心 2011年第2期324-330,共7页
The present building facility management status in China resulted in many problems such as high energy consumption,failure of automation control,services failure and poor indoor air quality.Based on questionnaires and... The present building facility management status in China resulted in many problems such as high energy consumption,failure of automation control,services failure and poor indoor air quality.Based on questionnaires and interviews to professional engineers and building users,a comprehensive evaluation index system was established on facility management of high-rise office buildings.A Fuzzy AHP based upon hierarchy criteria system was established.A Fuzzy AHP Evaluation Model on Facility Management System was set up;α-cut analysis was introduced and incorporated with expert knowledge together,which made up the optimism index λ.The fuzzy optimum crisp weight of each criterion was resulted from data-mining.Case investigations were processed in high-rise office buildings in Shenyang.The results illustrated that indoor air quality,thermal comfort and life cycle cost were the most important indexes in the evaluation of Facility Management System of high rise office buildings.Residents in high-rise buildings in Shenyang pay less attention to maintenance management and environment protection.By comparison with the analysis result of Export Choice,Fuzzy AHP-based evaluation model could act as a scientific reference for the establishment of governmental standards in facility management area in building. 展开更多
关键词 building facility management evaluation index Fuzzy AHP indoor air quality thermal comfort
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THE DGW-I FURNACE A MATERIALS PROCESSING FACILITY IN "SZ-2" SPACECRAFT 被引量:1
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作者 WANG Jinchang LIU Yan +4 位作者 AI Fei YU Qiang REN Juanxi TAN Xiaochen CEI Weixing 《空间科学学报》 CAS CSCD 北大核心 2002年第z1期154-158,共5页
The DGW-I is a new material processing facility developed in China,which was firstly carried into orbit in November 1999 by the SZ-1 spacecraft and then in January 2001 carried by SZ-2 into space again,and successfull... The DGW-I is a new material processing facility developed in China,which was firstly carried into orbit in November 1999 by the SZ-1 spacecraft and then in January 2001 carried by SZ-2 into space again,and successfully processed 6 samples of materials,including 3 samples of alloys,2 of semiconductors and 1 sample of oxide crystal. 展开更多
关键词 MICROGRAVITY Space material science Material processing facility
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Detuning effect corrections using octupoles in diffraction-limited storage ring
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作者 Xuan Shouzhi Tian Shunqiang +2 位作者 Liu Xinzhong Gong Yihao Mao Linglong 《强激光与粒子束》 北大核心 2025年第7期72-82,共11页
The next generation of synchrotron radiation light sources features extremely low emittance,enabling the generation of synchrotron radiation with significantly higher brilliance,which facilitates the exploration of ma... The next generation of synchrotron radiation light sources features extremely low emittance,enabling the generation of synchrotron radiation with significantly higher brilliance,which facilitates the exploration of matter at smaller scales.However,the extremely low emittance results in stronger sextupole magnet strengths,leading to high natural chromaticity.This necessitates the use of sextupole magnets to correct the natural chromaticity.For the Shanghai Synchrotron Radiation Facility Upgrade(SSRF-U),a lattice was designed for the storage ring that can achieve an ultra-low natural emittance of 72.2 pm·rad at the beam energy of 3.5 GeV.However,the significant detuning effects,driven by high second-order resonant driving terms due to strong sextupoles,will degrade the performance of the facility.To resolve this issue,installation of octupoles in the SSRF-U storage ring has been planned.This paper presents the study results on configuration selection and optimization method for the octupoles.An optimal solution for the SSRF-U storage ring was obtained to effectively mitigate the amplitude-dependent tune shift and the second-order chromaticity,consequently leading to an increased dynamic aperture(DA),momentum acceptance(MA),and reduced sensitivity to magnetic field errors. 展开更多
关键词 Shanghai Synchrotron Radiation facility Upgrade OCTUPOLE amplitude-dependent tune shift dynamic aperture momentum aperture
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Facile preparation of Fe/N-based biomass porous carbon composite towards enhancing the thermal decomposition of DAP-4 被引量:1
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作者 Er-hai An Xiao-xia Li +5 位作者 Cun-juan Yu Ying-xin Tan Zi-jun Fan Qing-xia Li Peng Deng Xiong Cao 《Defence Technology(防务技术)》 SCIE EI CAS CSCD 2024年第1期288-294,共7页
Fe/N-based biomass porous carbon composite(Fe/N-p Carbon) was prepared by a facile high-temperature carbonization method from biomass,and the effect of Fe/N-p Carbon on the thermal decomposition of energetic molecular... Fe/N-based biomass porous carbon composite(Fe/N-p Carbon) was prepared by a facile high-temperature carbonization method from biomass,and the effect of Fe/N-p Carbon on the thermal decomposition of energetic molecular perovskite-based material DAP-4 was studied.Biomass porous carbonaceous materials was considered as the micro/nano support layers for in situ deposition of Fe/N precursors.Fe/Np Carbon was prepared simply by the high-temperature carbonization method.It was found that it showed the inherent catalysis properties for thermal decomposition of DAP-4.The heat release of DAP-4/Fe/N-p Carbon by DSC curves tested had increased slightly,compared from DAP-4/Fe/N-p Carbon-0.The decomposition temperature peak of DAP-4 at the presence of Fe/N-p Carbon had reduced by 79°C from384.4°C(pure DAP-4) to 305.4°C(DAP-4/Fe/N-p Carbon-3).The apparent activation energy of DAP-4thermal decomposition also had decreased by 29.1 J/mol.The possible catalytic decomposition mechanism of DAP-4 with Fe/N-p Carbon was proposed. 展开更多
关键词 Biomass materials Porous carbon DAP-4 Thermal decomposition Facile method
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基于MOF的软件体系结构分析结果集成框架 被引量:6
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作者 陈湘萍 黄罡 +2 位作者 宋晖 孙艳春 梅宏 《软件学报》 EI CSCD 北大核心 2012年第4期831-845,共15页
运行在网络环境下的软件在自适应过程中,需要集成多种分析方法来进行分析、规划和决策.由于自适应的决策程序或者设计人员以SA(software architecture)模型作为解析和理解分析结果的上下文,这使得分析结果与SA模型的集成尤为重要.但是,... 运行在网络环境下的软件在自适应过程中,需要集成多种分析方法来进行分析、规划和决策.由于自适应的决策程序或者设计人员以SA(software architecture)模型作为解析和理解分析结果的上下文,这使得分析结果与SA模型的集成尤为重要.但是,现有的分析方法集成框架多关注于提供输入、执行分析、从而得到分析结果的过程,对分析结果的集成关注不够.针对分析结果与SA模型集成中元模型、模型和视图3个层次的挑战,提出一种软件体系结构分析结果集成框架.框架使用MOF(meta-object facility)元建模技术提供ADL(architectural descriptionlanguage)的扩展机制;使用自动生成模型转换实现SA模型与分析结果的合成;使用代码生成技术扩展建模工具为扩展后的ADL提供模型视图.最后以3种分析方法——两种可靠性评估方法和容错风格的规划方法为例,使用集成框架将其加以集成并应用于Ecperf系统的SA模型的分析中,从而展示集成框架的可行性和有效性. 展开更多
关键词 软件体系结构 模型驱动 MOF(meta-object facility)
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基于MDA的TRISO-Model模型管理方法及应用 被引量:6
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作者 袁峰 李明树 《软件学报》 EI CSCD 北大核心 2007年第7期1612-1625,共14页
TRISO-Model(tridimensional integrated software development model)是为处理软件开发的复杂性和动态性而提出的三维集成软件开发方法学,其中,多维模型之间的语义一致性维护以及对模型应用中公共操作部分的重用,提出了基于一致语义进... TRISO-Model(tridimensional integrated software development model)是为处理软件开发的复杂性和动态性而提出的三维集成软件开发方法学,其中,多维模型之间的语义一致性维护以及对模型应用中公共操作部分的重用,提出了基于一致语义进行模型管理的需求.给出了基于MDA(model driven architecture)进行模型管理的方法MDA-MMMethod(MDA based model management method),应用MDA的4层模型管理结构,基于MDA核心标准MOF(meta object facility)所提供的公共语义基础管理模型和元模型,MDA-MMMethod支持各种MDA模型操作标准实现在TRSIO-model应用中的重用.开发了相应的支持系统MDA-MMSystem(MDA based model management system),应用于SoftPM的项目实践中.与传统方法相比,模型应用的开发效率得到了显著提高,同时降低了开发成本.最后,给出了模型融合的应用实例介绍. 展开更多
关键词 TRISO-model(tridimensional integrated software development model) MDA(model driven architecture) MOF(meta object facility)元建模 模型转换
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How does stiffness of trabecular meshwork affect outflow resistance in human eyes?
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作者 Fan Yuan Lucinda J.Camras +2 位作者 W.Daniel Stamer David Epstein Pedro Gonzalez 《医用生物力学》 EI CAS CSCD 北大核心 2013年第S1期86-88,共3页
Purpose Ocular hypertension is the primary risk factor for development of glaucoma and the only modifiable endpoint<sup>[1,2]</sup>.Clinical trials involving thousands of patients have shown consistently t... Purpose Ocular hypertension is the primary risk factor for development of glaucoma and the only modifiable endpoint<sup>[1,2]</sup>.Clinical trials involving thousands of patients have shown consistently that lowering intraocular pressure(IOP)in those with glaucoma,whether or not their IOP is above normal,slows vision loss.IOP elevation is the result of diminished outflow facility in the conventional outflow pathway;and the highest resistance to aqueous humor outflow resides in the juxtacanalicular tissue(JCT)layer of trabecular meshwork(TM)and the inner wall of Schlemm’s canal(SC).However,mechanisms of outflow facility decrease in glaucomatous eyes remain to be determined. 展开更多
关键词 OUTFLOW TRABECULAR glaucoma INTRAOCULAR facility consistently STIFFNESS CANAL lowering ENDPOINT
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Australian Family Physician 2015年5月目次选登
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作者 本刊编辑部 《中国全科医学》 CAS CSCD 北大核心 2015年第18期2216-2216,共1页
Type 2 diabetes and obesity in young adults青年2型糖尿病和肥胖·Glucose-lowering medicines for type 2 diabetes2型糖尿病降血糖药物·The introduction of insulin in type 2 diabetes mellitus2型糖尿病胰岛素介绍... Type 2 diabetes and obesity in young adults青年2型糖尿病和肥胖·Glucose-lowering medicines for type 2 diabetes2型糖尿病降血糖药物·The introduction of insulin in type 2 diabetes mellitus2型糖尿病胰岛素介绍·Continuous glucose monitoring and pumps持续的血糖监测和抽送·Diet and diabetes饮食和糖尿病·Residential aged care facility residents:training issues for Australian general 展开更多
关键词 AUSTRALIAN 降血糖药物 PHYSICIAN MEDICINES facility Family lowering GLUCOSE OBESITY young
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Adaptive Signal Conditioning Technology in Fighter Weapon System Test
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作者 范惠林 侯满义 +1 位作者 耿振野 徐洪吉 《Defence Technology(防务技术)》 SCIE EI CAS 2009年第4期317-320,共4页
In order to realize the real-time and precise test for a weapon system of a certain type of fighter,a signal classification method according to attributes is proposed,common input channels for multiple signals are con... In order to realize the real-time and precise test for a weapon system of a certain type of fighter,a signal classification method according to attributes is proposed,common input channels for multiple signals are configured optimally,and a test adapter and an adaptive signal conditioning module is designed. The hardware of conditioning module can be configured flexibly and the programmable test range can be adjusted owing to programmable multiplexer. An FPGA adaptive filter is designed by the calculated filter coefficient vectors with LMS method to solve the problem of parallel test of fighter weapon system in electromagnetic interference environment. The adaptive signal conditioning technology is characterized by high efficiency,precision and integration. Its application makes the test system successful to conduct real-time and parallel test for a weapon system,which is developed based on VXI bus and virtual-instrument technology. 展开更多
关键词 ground-based facility and technical support of aviation fighter weapon system test signal conditioning ADAPTIVE FILTER
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Microgravity Material Research in China:2012–2014
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作者 WANG Yuren DAI Guoliang +5 位作者 WANG Jing FENG Shaobo LUO Xinghong ZHOU Yanfei CHEN Lidong YU Yude 《空间科学学报》 CAS CSCD 北大核心 2014年第5期757-764,共8页
During 2012–2014, the main research activities from microgravity material research were focused on, which include study of microgravity effects on collagen fibrillogenesis and HAP crystallization, microgravity experi... During 2012–2014, the main research activities from microgravity material research were focused on, which include study of microgravity effects on collagen fibrillogenesis and HAP crystallization, microgravity experiments using drop tube, and research of thermoelectric materials for space.This paper summarizes all these activities. 展开更多
关键词 Collagen fibrillogenesis CRYSTALLIZATION MICROGRAVITY Refractory alloy facility
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WORLD NEWS IN BRIEF (October 1-15, 1991)
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《国际展望》 北大核心 1991年第20期32-32,共1页
Philippine President Corazon Aquino announced on October 2 she will give the United States no more than three years to leave Subic Bay naval base, abandoning plans for a referendum to save the facility.
关键词 facility Philippine LEAVE naval NEWS EARLIER TOUGH ENJOY FIGHTING headed
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Damage assessment of the target area of the island/reef under the attack of missile warhead 被引量:12
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作者 Cheng-lin Zhai Xiao-wei Chen 《Defence Technology(防务技术)》 SCIE EI CAS CSCD 2020年第1期18-28,共11页
Under the background of vigorously developing facilities of island/reef in the world,the economic value and strategic significance of the island/reef have become increasingly important.Unfortunately,they may easily be... Under the background of vigorously developing facilities of island/reef in the world,the economic value and strategic significance of the island/reef have become increasingly important.Unfortunately,they may easily become the attacking target of missiles in the war time.Therefore,aiming at the damage quantification of the targets in the island/reef under the missile attacking,a macroscopic damage assessment model for the target area is proposed in this paper.The model focuses on the construction of the assessment model framework.Firstly,the analytic hierarchy process and the grey relational analysis are applied to measure the importance of each target in the region through four indicators of the target hazard,striking urgency,damage advantage and mission relevance,respectively.Secondly,based on the damage mechanism of shock wave and fragments to target,the corresponding damage model is established,and the damage grade of each target in the evaluated area is obtained according to the damage criteria and grading standard.Finally,the model obtains the overall damage grade of the target area by employing the fuzzy comprehensive evaluation method,with synthesizing the importance and the damage grade of each target.Through the verification of an example,it demonstrates the certain feasibility of the model and provides a certain basis and reference for the subsequent research. 展开更多
关键词 Island/reef facilities Shock wave FRAGMENT DAMAGE assessment Fuzzy COMPREHENSIVE evaluation method
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Facile Preparation of Polypeptides:Moisture Insensitive and Superfast Ring Opening Polymerization of N-Carboxyanhydrides 被引量:3
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作者 栾世方 《材料导报》 EI CAS CSCD 北大核心 2019年第1期1-2,共2页
(a)NCA polymerization initiated by LiHMDS or other initiators in THF,initiator i)n-hexylamine,ii)HMDS,iii)bipyNi(COD);(b)LiHMDS-initiated open vessel polymerization of BLGNCA at 26 mg and 2 g scale;(c)GPC traces of po... (a)NCA polymerization initiated by LiHMDS or other initiators in THF,initiator i)n-hexylamine,ii)HMDS,iii)bipyNi(COD);(b)LiHMDS-initiated open vessel polymerization of BLGNCA at 26 mg and 2 g scale;(c)GPC traces of poly-BLG at variable DP;(d)Reaction rates of LiHMDS and hexylamine initiated BLGNCA polymerization in THF with NCA:initiator ratio of 100∶1 and initial NCA concentration at 0.2 mol/L;(e)CD spectra of poly-BLG at variable DP prepared from LiHMDS-initiated NCA polymerization. 展开更多
关键词 FACILE PREPARATION polypeptides:moisture insensitive
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New Applications of ELF Survey Meter for Investigation of Electric and Magnetic Safety in Uranium Conversion Facilities
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作者 Alireza Hajian 《地学前缘》 EI CAS CSCD 北大核心 2009年第S1期62-62,共1页
In this paper it has been presented the ELF Survey Meter and its application for investigation of presence of electric and magnetic fields strength in uranium conversion facilities,especially to investigate the effect... In this paper it has been presented the ELF Survey Meter and its application for investigation of presence of electric and magnetic fields strength in uranium conversion facilities,especially to investigate the effect of electric and magnetic sources on the operation of electrical controllers like PLC instruments, electrical drivers and actuators which are sensitive to presence of electrical and magnetic fields and also the effect of high voltage power lines 展开更多
关键词 ELF SURVEY METER URANIUM CONVERSION facilities electrical and MAGNETIC safety
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FOREWORD
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作者 ZHAO Zhengguo 《中国科学技术大学学报》 CAS CSCD 北大核心 2016年第7期530-530,共1页
The'International Workshop on e+e-collisions fromtoψ'(PHIPSI15),was held at University of Science and Technology of China(USTC),Hefei,China,from Wednesday,September 23 to Saturday,September 26,2015.This is ... The'International Workshop on e+e-collisions fromtoψ'(PHIPSI15),was held at University of Science and Technology of China(USTC),Hefei,China,from Wednesday,September 23 to Saturday,September 26,2015.This is the 10 th workshop in a series,which started in Karlsruhe in 1996 and continued in Novosibirsk(1999),SLAC(2001),Pisa(2003),Novosibirsk(2006),Frascati(2008),Beijing(2009), 展开更多
关键词 Hefei WORKSHOP continued facilities FOREWORD NSFC GAMMA PUZZLE COMMITTEE carrying
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FOREWORD
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作者 ZHAO Zhengguo 《中国科学技术大学学报》 CAS CSCD 北大核心 2016年第4期256-256,共1页
The'International Workshop on e+e-collisions from Ф to ψ'(PHIPSI15),was held at University of Science and Technology of China(USTC),Hefei,China,from Wednesday,September 23 to Saturday,September 26,2015.This ... The'International Workshop on e+e-collisions from Ф to ψ'(PHIPSI15),was held at University of Science and Technology of China(USTC),Hefei,China,from Wednesday,September 23 to Saturday,September 26,2015.This is the 10th workshop in a series,which started in Karlsruhe in 1996and continued in Novosibirsk(1999),SLAC(2001),Pisa(2003),Novosibirsk(2006),Frascati(2008)。 展开更多
关键词 Hefei WORKSHOP continued facilities NSFC FORWARD PUZZLE COMMITTEE carrying VIOLATION
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FOREWORD
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作者 ZHAO Zhengguo 《中国科学技术大学学报》 CAS CSCD 北大核心 2016年第5期344-344,共1页
The'International Workshop on e^+e^-collisions fromφtoψ'(PHIPSI15),was held at University of Science and Technology o{China(USTC),He{el,China,{rom Wednesday,September 23 to Saturday,September 26,2015.This is... The'International Workshop on e^+e^-collisions fromφtoψ'(PHIPSI15),was held at University of Science and Technology o{China(USTC),He{el,China,{rom Wednesday,September 23 to Saturday,September 26,2015.This is the 10th workshop in a series,which started in Karlsruhe in 1996 and continued in Novosibirsk(1999),SLAC(2001),Pisa(2003),Novosibirsk(2006),Frascati(2008), 展开更多
关键词 continued WORKSHOP facilities Hefei NSFC
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FOREWORD
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作者 ZHAO Zhengguo 《中国科学技术大学学报》 CAS CSCD 北大核心 2016年第6期446-446,共1页
The'International Workshop on e^+e^- collisions from Ф to ψ'(PHIPSI15),was held at University of Science and Technology of China(USTC),Hefei,China,from Wednesday,September 23 to Saturday,September 26,2015.Th... The'International Workshop on e^+e^- collisions from Ф to ψ'(PHIPSI15),was held at University of Science and Technology of China(USTC),Hefei,China,from Wednesday,September 23 to Saturday,September 26,2015.This is the 10th workshop in a series,which started in Karlsruhe in 1996 and continued in Novosibirsk。 展开更多
关键词 Hefei WORKSHOP continued facilities FORWARD NSFC GAMMA PUZZLE COMMITTEE carrying
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