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Higher-mode effect on the seismic responses of buildings with viscoelastic dampers

Earthquake Engineering and Engineering Vibration 2002年第1期1卷 119-129页

作者： meng-hao tsai Department of Civil Engineering Taiwan UniversityChinese Taipei Postdoctoral Research Fellow

In conventional modal analysis procedures,usually only a few dominant modes are required to describe the dynamic behavior of multi-degrees-of-freedom *** number of modes needed in the dynamic analysis depends on the higher-mode contribution to the structural response,which is called the higher-mode *** modal analysis approach, however,may not be directly applied to the dynamic analysis of viscoelastically damped *** is because the dynamic properties of the viscoelastic dampers depend on their vibration ***,the structural stiffness and damping contributed from those dampers would be different for each *** this study,the higher-mode effect is referred to as the response difference induced by the frequency-dependent property of viscoelastic dampers at higher *** analysis procedures for buildings with viscoelastic dampers distributed proportionally and non-proportionally to the stiffness of the buildings are developed to consider the higher-mode *** studies on shear-type viscoelastically damped building models are conducted to examine the accuracy of the proposed procedures and to investigate the significance of the higher-mode effect on their seismic *** damper models are used to estimate the peak damper forces in the proposed procedures. Study results reveal that the higher-mode effect is significant for long-period viscoelastically damped *** higher-mode effect on base shear is less significant than on story acceleration *** difference of the seismic response usually occurs at the top ***,the higher-mode effect may not be reduced by decreasing the damping ratio provided by the viscoelastic *** practical application,it is realized that the linear viscous damping model without considering the higher-mode effect may predict larger damper forces and hence,is on the conservative side.

关键词： model analysis viscoelastic dampers higher-mode effect

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A cellulose-based lithium-ion battery separator with regulated ionic transport and high thermal stability for extreme environments

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Nano Research 2025年第1期18卷 315-322页

作者： Kun-Peng Yang Song Xie Zi-meng Han hao-Cheng Liu Chong-Han Yin Wen-Bin Sun Zhang-Chi Ling Huai-Bin Yang De-Han Li Qing-Fang Guan Shu-Hong Yu Department of Chemistry New Cornerstone Science LaboratoryInstitute of Biomimetic Materials&ChemistryAnhui Engineering Laboratory of Biomimetic MaterialsDivision of Nanomaterials&ChemistryHefei National Research Center for Physical Sciences at the MicroscaleUniversity of Science and Technology of ChinaHefei 230026China Institute of Innovative Materials Department of Materials Science and EngineeringDepartment of ChemistrySouthern University of Science and TechnologyShenzhen 518055China

Separators play a critical role in lithium-ion ***,the restrictions of thermal stability and inferior electrical performance in commercial polyolefin separators significantly limit their applications under harsh ***,we report a cellulose-assisted self-assembly strategy to construct a cellulose-based separator massively and *** an ultrahigh ionic conductivity in electrolytes of 3.7 mS·cm^(-1) and the ability to regulate ion transport,the obtained separator is a promising alternative for high-performance lithium-ion *** addition,integrated with high thermal stability,the cellulose-based separator endows batteries with high safety at high temperatures,greatly expanding the application scenarios of energy storage devices in extreme environments.

关键词： lithium-ion batteries bio-inspired materials battery separators cellulose nanofiber ultrahigh ionic conductivity high safety

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止血带在导航系统下行全膝关节置换的应用时机选择:一项单中心、回顾性分析

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中国组织工程研究 2025年第15期29卷 3159-3164页

作者：潘浩杨梦刘国强河北省沧州中西医结合医院河北省中西医结合骨关节病研究重点实验室河北省沧州市061000

背景:传统全膝关节置换过程中应用止血带的时机已有明确报道,随着关节相关技术不断精进,导航系统下全膝关节置换应用止血带的时机却鲜有报道。目的:评估采用全程与半程止血带对Brainlab导航系统下行全膝关节置换疗效的影响。方法:回顾... 详细信息

背景:传统全膝关节置换过程中应用止血带的时机已有明确报道,随着关节相关技术不断精进,导航系统下全膝关节置换应用止血带的时机却鲜有报道。目的:评估采用全程与半程止血带对Brainlab导航系统下行全膝关节置换疗效的影响。方法:回顾性分析2022年1-12月在河北省沧州中西医结合医院行导航系统下全膝关节置换患者的资料,选择符合条件的145例患者进行分析,按松开止血带时机分为全程组(n=71)和半程组(n=74)。收集患者一般资料、围术期情况、术后膝关节周围肿胀情况、下肢深静脉血栓发生情况、目测类比评分、美国特种外科医院膝关节评分和关节遗忘评分,评估膝关节功能并进行比较。结果与结论:①与半程组相比,全程组患者的手术时间更短、下肢深静脉血栓发生率更高、术后膝关节肿胀情况更重(P0.05);④提示采用导航系统行全膝关节置换的患者中,半程使用止血带隐匿性失血量少、术后患肢肿胀程度及下肢深静脉血栓发生率低,膝关节功能恢复更快。

关键词：导航系统全膝关节置换止血带膝关节功能关节遗忘评分

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Recent advances in SERS detection of perchlorate

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Frontiers of Chemical Science and Engineering 2017年第3期11卷 448-464页

作者： Jumin hao Xiaoguang meng Center for Environmental Systems Stevens Institute of Technology 1 Castle Point Terrace Hoboken NJ 07030 USA NovelTech JMC Inc. 409 Minnisink Road Suite 208 Totowa NJ 07512 USA

Perchlorate has recently emerged as a wide- spread environmental contaminant of healthy concern. Development of novel detection methods for perchlorate with the potential for field use has been an urgent need. The investigation has shown that surface-enhanced Raman scattering （SERS） technique has great potential to become a practical analysis tool for the rapid screening and routine monitoring of perchlorate in the field, particularly when coupled with portable/handheld Raman spectrometers. In this review article, we summarize progress made in SERS analysis of perchlorate in water and other media with an emphasis on the development of SERS substrates for perchlorate detection. The potential of this technique for fast screening and field testing ofperchlorate-contaminated environmental samples is discussed. The challenges and possible solutions are also addressed, aiming to provide a better understanding on the development directions in the research field.

关键词： perchlorate SERS detection substrate mod-ification nanostructure

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Bullous pemphigoid associated with acquired hemophilia A: A case report

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World Journal of Clinical Cases 2025年第4期13卷 28-33页

作者： Su-Ye Hu meng-Can Li Zi-Jia hao Xu-Ya Chai Pei-Sai Li Yang Liu Li-Xia Liu Ying Xu Pan-Pan Yang Ling-E Li Department of Dermatology Shijiazhuang Traditional Chinese Medicine HospitalShijiazhuang 050051Hebei ProvinceChina Graduate School Hebei University of Traditional Chinese MedicineShijiazhuang 050051Hebei ProvinceChina Department of Pathology Shijiazhuang Traditional Chinese Medicine HospitalShijiazhuang 050051Hebei ProvinceChina

BACKGROUND Acquired hemophilia A (AHA) is a rare and potentially severe bleeding disordercaused by circulating autoantibodies against factor Ⅷ (FⅧ). In approximately50% of the patients, the condition is associated with autoimmune diseases,cancers, medication use, pregnancy, and the post-partum period. Bullous pemphigoid(BP) is a chronic autoimmune subepidermal blistering disease associatedwith tissue-bound and circulating autoantibodies against BP antigens 180 (BP180)and 230 (BP230). AHA-associated BP has a high mortality rate;hence, the understandingof this disease must *** SUMMARY A 69-year-old man presented with erythema, blisters, blood blisters, and crustsaccompanied by severe pruritus for more than 20 days, and ecchymosis andswelling on his left upper arm for 3 days. Pathological examination revealed asubepidermal blister that contained eosinophils. Laboratory tests showed that theBP180 autoantibody levels had increased, isolated activated partial thromboplastintime was notably prolonged (115.6 s), and coagulation FⅧ activity wasextremely low (< 1.0%). Furthermore, the FⅧ inhibitor titer had greatlyincreased (59.2 Bethesda units). Therefore, the patient was diagnosed as having BP associated with AHA, prescribed 0.05% topical halometasone cream, and transferred to a higher-level hospitalfor effective treatment;however, he died after 2 *** AHA associated BP is rare, dangerous, and has a high mortality rate. Therefore, its timely diagnosis and effectivetreatment are necessary.

关键词： Bullous pemphigoid Acquired hemophilia A Acquired hemophilia A FactorⅧ Case report

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A Cellular Automata Based Verifiable Multi-secret Sharing Scheme Without a Trusted Dealer

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Chinese Journal of Electronics 2017年第2期26卷 313-318页

作者： LI meng YU Jia hao Rong College of Computer Science and Technology Qingdao University Shandong Provincial Key Laboratory of Computer Network

We proposed a verifiable multi-secret sharing scheme without a *** use cellular automata,having the properties of linear computations and parallel computations,to construct our *** linear computational property makes it possible to build a scheme without the assistance of a trusted dealer,and the parallel computational property contributes to the high efficiency of the *** function is used to realize the verification of shares,which also makes our scheme more *** security of the scheme is also analyzed.

关键词： Multi-secret sharing Verifiability Trusted dealer Cellular automata Hash function

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Theoretical and experimental investigation on novel 2D maglev servo proportional valve

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Chinese Journal of Aeronautics 2021年第4期34卷 416-431页

作者： Bin meng hao XU Jian RUAN Sheng LI Key Laboratory of Special Purpose Equipment and Advanced Manufacturing Technology Ministry of Education Zhejiang University of TechnologyHangzhou 310018China

This paper presents a novel two-dimensional maglev servo proportional cartridge valve(2 D maglev valve),where a contactless maglev coupling is introduced between electro-mechanical converter and valve body to realize functions of force transmission,spool position feedback and linear-rotary motion *** configuration can effectively reduce cost of both valve manufacturing and electro-mechanical converter,while still maintain features of 2 D valve such as null pilot leakage,high power-to-weight ratio and excellent anti-pollution ***,the characteristic equation of the valve is derived using linear theory,and the stability criterion is established for parameter *** influences of crucial structural parameters such as initial height of overlapping area,width of high-pressure and low-pressure holes,acting radius of magnetic force,pitch angle of maglev coupling,length of sensitive chamber and system pressure on the dynamic response are investigated based on AMESim numerical *** prototype valve is then designed and manufactured and a special test rig is *** no-load flow characteristic,load flow characteristic,leakage characteristic,amplitude and phase frequency characteristics and step response under different system pressures are *** experimental results are in a good agreement with the simulated *** an over-damped system,the prototype valve has excellent working stability,which can reach a no-load flow rate of 105.9 L/min with hysteresis of 3.51%,amplitude bandwidth of 28.7 Hz and phase bandwidth of 42.8 Hz under 21 *** research indicates that the 2 D maglev valve can be a potential solution of flow rate control valve for flight control surface system of civil aircraft with high pressure and large flow rate application.

关键词： Dynamic characteristic 2D valve Maglev coupling Servo proportional valve Stability criterion

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Influence of ammonia and Brown gas injection on the iron ore sintering characteristics under biochar substitution

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Particuology 2024年第11期94卷 16-28页

作者： Laiquan Lv Jiankang Wang Hanxiao meng hao Zhou State Key Laboratory of Clean Energy Utilization Institute for Thermal Power EngineeringZhejiang UniversityHangzhou310027China

The influence of ammonia and Brown gas injection on the iron ore sintering characteristics was explored through sintering pot experiments based on biochar substitution to increase biochar substitution proportion and reduce fossil energy *** dividing the high-temperature stage of the sintering bed,the heating rate and cooling rate were calculated,and the reasons for poor sintering quality under a high biochar substitution ratio were *** results showed that under the 40%biochar substitution ratio,the cooling rate of the sintering bed significantly increased,the high-temperature duration time was short,and the sintering quality deteriorated *** injection of 0.5–1%vol ammonia or 1–2%vol Brown gas can reduce the cooling rate,prolong the high-temperature duration,and optimize the sintering *** on 1%vol ammonia or 2%vol Brown gas injection,reducing the proportion of biochar with equal calorific value further increases the sintering comprehensive index,which means that using 1%vol ammonia or 2%vol Brown gas injection to assist sintering can reduce the proportion of coke usage to 60%,while the proportion of biochar substitution is 33.76%and 32.47%,*** research results provide an effective solution for low-carbon sintering.

关键词： NH_(3)injection Brown gas injection Biochar substitution Iron ore sintering Coke consumption reduction

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Nonlinear Dynamic Characteristics of Turbulent Non-Premixed Acoustically Perturbed Swirling Flames

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Journal of Thermal Science 2022年第3期31卷 882-894页

作者： ZHOU hao TAO Chengfei meng Sheng CEN Kefa State Key Laboratory of Clean Energy Utilization Zhejiang UniversityHangzhou310027China

The main objective of this article was to experimentally investigate the dynamic response of diffusion flame under acoustic excitation in a laboratory-scale *** parametric variations of the burner,the burner inlet length and variation of the airflow rate,were *** results were analyzed through nonlinear time series analysis and several resonance characteristics were *** indicate that the flame-acoustic resonance only appears under certain frequencies together with the fuel tube *** characteristics of the combustion chamber and air inlet in the non-premixed burner indicate quasi-periodic or limit cycle oscillations,***-acoustic resonance would trigger the frequency and amplitude mode-transition in ***,the intermittency of flame heat release was observed under variation of inlet length and airflow rate in the burner;the 445 mm case shows more frequency peaks and fluctuations than the 245 mm *** typical flame forms were examined during the flame-acoustic resonance conditions,evolves from wrinkled flames to diverged flames,then evolves to reattached flames and finally to blow-off *** study proposed the practical application of nonlinear time-series analysis method as a detection tool for flame-acoustic resonance in laboratory non-premixed burners,which could contribute to the detection and prevention of potential thermoacoustic instabilities or resonance structure failures of industrial ***,this study demonstrates an alternative to conventional linear tool for the characterization of nonlinear acoustic resonance in industrial boilers.

关键词： flame-acoustic resonance non-linear time series analysis non-premixed burners intermittency dynamic characteristics

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Restricted Arc-Connectivity of Harary Digraphs

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Journal of the Operations Research Society of China 2024年第2期12卷 540-547页

作者： Jun-hao Zhang Ji-Xiang meng College of Mathematics and System Science Xinjiang UniversityUrumqi 830046XinJiangChina

The h-restricted arc-connectivity of a digraph is an important parameter to measure fault-tolerance of interconnection *** paper determines that the h-restricted arc-connectivity of the Harary digraph D=G(n;1,2,.:,k)i... 详细信息

关键词： Restricted arc-connectivity λ_(h)(D) Super-λ_(h) λ_(h)-Atom λ_(h)-Superatom

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