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Structural Health Monitoring by Accelerometric Data of a Continuously Monitored Structure with Induced Damages
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作者 Giada Faraco Andrea Vincenzo De Nunzio +1 位作者 Nicola Ivan Giannoccaro Arcangelo Messina 《Structural Durability & Health Monitoring》 EI 2024年第6期739-762,共24页
The possibility of determining the integrity of a real structure subjected to non-invasive and non-destructive monitoring,such as that carried out by a series of accelerometers placed on the structure,is certainly a g... The possibility of determining the integrity of a real structure subjected to non-invasive and non-destructive monitoring,such as that carried out by a series of accelerometers placed on the structure,is certainly a goal of extreme and current interest.In the present work,the results obtained from the processing of experimental data of a real structure are shown.The analyzed structure is a lattice structure approximately 9 m high,monitored with 18 uniaxial accelerometers positioned in pairs on 9 different levels.The data used refer to continuous monitoring that lasted for a total of 1 year,during which minor damage was caused to the structure by alternatively removing some bracings and repositioning them in the structure.Two methodologies detecting damage based on decomposition techniques of the acquired data were used and tested,as well as a methodology combining the two techniques.The results obtained are extremely interesting,as all the minor damage caused to the structure was identified by the processing methods used,based solely on the monitored data and without any knowledge of the real structure being analyzed.The results use 15 acquisitions in environmental conditions lasting 10 min each,a reasonable amount of time to get immediate feedback on possible damage to the structure. 展开更多
关键词 Structural health monitoring damage detection vibration measurements stochastic subspace identification
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Combined fascia iliaca compartment block and monitored anesthesia care for geriatric patients with hip fracture: Two case reports 被引量:1
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作者 Li Zhan Yu-Jie Zhang Jing-Xian Wang 《World Journal of Clinical Cases》 SCIE 2021年第27期8268-8273,共6页
BACKGROUND Major hip surgery usually requires neuraxial or general anesthesia with tracheal intubation and may be supplemented with a nerve block to provide intraoperative and postoperative pain relief.CASE SUMMARY Th... BACKGROUND Major hip surgery usually requires neuraxial or general anesthesia with tracheal intubation and may be supplemented with a nerve block to provide intraoperative and postoperative pain relief.CASE SUMMARY This report established that hip surgical procedures can be performed with a fascia iliaca compartment block(FICB)and monitored anesthesia care(MAC)while avoiding neuraxial or general anesthesia.This was a preliminary experience with two geriatric patients with hip fracture,American Society of Anesthesiologists status III,and with many comorbidities.Neither patient could be operated on within 48 h after admission.Both general anesthesia and neuraxial anesthesia were high-risk procedures and had contraindications.Hence,we chose nerve block combined with a small amount of sedation.Intraoperative analgesia was provided by single-injection ultrasound-guided FICB.Light intravenous sedation was added.Surgical exposure was satisfactory,and neither patient complained of any symptoms during the procedure.CONCLUSION This report showed that hip surgery for geriatric patients can be performed with FICB and MAC,although complications and contraindications are common.The anesthetic program was accompanied by stable respiratory and circulatory system responses and satisfactory analgesia while avoiding the adverse effects and problems associated with either neuraxial or general anesthesia. 展开更多
关键词 Fascia iliaca compartment block monitored anesthesia care GERIATRIC Hip fracture ULTRASOUND-GUIDED Case report
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Applications of Monitored Natural Attenuation in Contaminated Soil and Groundwater 被引量:1
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作者 Li Xiaoping Cheng Xi 《Meteorological and Environmental Research》 CAS 2014年第5期31-35,共5页
Restoration of contaminated soil and groundwater could be divided into two phases. The first phase takes aim at reducing human being's health risks by active remediation, while the second phase aims at eliminating ec... Restoration of contaminated soil and groundwater could be divided into two phases. The first phase takes aim at reducing human being's health risks by active remediation, while the second phase aims at eliminating ecological risks by natural attenuation (NA). Because of cost-effective and sustainable cleanup, monitored natural attenuation (MNA) and enhanced natural attenuation (ENA) have been gaining more attention recently, especially in the respects of ecological risk-oriented contaminated land management and a follow-up measure after active remediation. The uses and procedures of MNA for contaminated site cleanup and remediation in USA and EU were introduced firstly, and then possible applications of MNA in China were suggested. More developments and practices of MNA and ENA for managing contaminated sites in China are expected. 展开更多
关键词 Contaminated soil Contaminated groundwater monitored natural attenuation APPLICATION China
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针刺联合Monitored Rehab Systems下肢智能运动训练系统对卒中偏瘫患者平衡及步行功能的影响 被引量:2
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作者 陈双钱 毛显禹 《浙江中西医结合杂志》 2022年第4期339-342,共4页
脑卒中是常见脑血管疾病,具有发病率高、致残率高等特点[1-2]。随着社会进步,医疗水平提升,脑卒中患者存活率增加,但大约有80%脑卒中患者会伴随运动功能障碍,其中以偏瘫为主,伴随步行能力下降、平衡协调功能障碍、运动能力下降等,严重... 脑卒中是常见脑血管疾病,具有发病率高、致残率高等特点[1-2]。随着社会进步,医疗水平提升,脑卒中患者存活率增加,但大约有80%脑卒中患者会伴随运动功能障碍,其中以偏瘫为主,伴随步行能力下降、平衡协调功能障碍、运动能力下降等,严重影响患者日常生活,增加患者家庭及社会负担[3-4]。Monitored Rehab Systems为闭链训练方式,可训练患者肢体控制、肌肉协同及关节匹配度,常用于下肢功能训练。针刺是中医外治疗法。本研究旨在观察观察针刺联合Monitored Rehab Systems下肢智能运动训练系统对卒中偏瘫患者平衡及步行功能影响,报道如下。 展开更多
关键词 针刺 monitored Rehab Systems训练 下肢智能运动训练系统 脑血流动力学 平衡功能 步行功能
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Clopidogrel Anergy and Monitored 被引量:1
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作者 刘泽霖 《血栓与止血学》 2014年第1期1-1,共1页
Clopidogrel Anergy2003 Germany Müller et at 105 patients with stable coronary artery disease using clopidogrel for PCI,about5%of patients showed no response to the drug,which is defined as platelets in the 20μmo... Clopidogrel Anergy2003 Germany Müller et at 105 patients with stable coronary artery disease using clopidogrel for PCI,about5%of patients showed no response to the drug,which is defined as platelets in the 20μmol/L ADP under the action of its aggregation only on the basis of the inhibition rate of 10%or less.These people postoperative thrombosis,showing the drug has resisters,and postoperative thrombosis related.2004 SchrPat the current 展开更多
关键词 CLOPIDOGREL ANERGY monitored
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METAL ION SUBSTIUTION OF Cd_5Zn_2-METALLOTHIONEINEIN WITR CUPROUS ION MONITORED BY ̄1HNMR
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作者 Wei Qiang GU Ming FENG +1 位作者 Yun Hua WANG ZhongXian HUANG(Department of Chemistry.Fudan University,Shanghai 200433) 《Chinese Chemical Letters》 SCIE CAS CSCD 1994年第11期953-954,共2页
Rat Liver Cd5Zn2-metallothionein isoforms were titrated with cuprous ion and monitored by 1H NMR Initial replacement occurred in β-domain followed by α-domain.MT exhibited well-defined structure under 10 mole equiva... Rat Liver Cd5Zn2-metallothionein isoforms were titrated with cuprous ion and monitored by 1H NMR Initial replacement occurred in β-domain followed by α-domain.MT exhibited well-defined structure under 10 mole equivalents cuprous ion. 展开更多
关键词 SUBSTIUTION OF BY METAL monitored HNMR Cd5Zn2 ZN
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A case of AML after allo-PBSCT whose microchimerism status in microsate llite DNA markers was monitored for prediction of early relapse and evaluation of effectiveness of DLI treatment
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《中国输血杂志》 CAS CSCD 2001年第S1期413-,共1页
关键词 AML A case of AML after allo-PBSCT whose microchimerism status in microsate llite DNA markers was monitored for prediction of early relapse and evaluation of effectiveness of DLI treatment DNA CASE
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Microsurgerical treatment of PCA aneurysms via subtemporal approach monitored by microvascular Doppler(10 cases report)
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作者 孙雪波 《外科研究与新技术》 2011年第3期198-198,共1页
Objective To summarize the clinical features of intracranial aneurysms of posterior cerebral artery (PCA) ,and the surgical approaches and operative skills to treat them . Methods The aneurysms arose from the P1 segme... Objective To summarize the clinical features of intracranial aneurysms of posterior cerebral artery (PCA) ,and the surgical approaches and operative skills to treat them . Methods The aneurysms arose from the P1 segment in 3 patients,the P2 segment in 5 patients and the P3 segment in 2 patients. 展开更多
关键词 PCA cases report Microsurgerical treatment of PCA aneurysms via subtemporal approach monitored by microvascular Doppler
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Analysis of monitored ground support and rock mass response in a longwall tailgate entry 被引量:4
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作者 G.S.Esterhuizen D.F.Gearhart I.B.Tulu 《International Journal of Mining Science and Technology》 SCIE EI CSCD 2018年第1期43-51,共9页
A comprehensive monitoring program was conducted to measure the rock mass displacements, support response, and stress changes at a longwall tailgate entry in West Virginia.Monitoring was initiated a few days after dev... A comprehensive monitoring program was conducted to measure the rock mass displacements, support response, and stress changes at a longwall tailgate entry in West Virginia.Monitoring was initiated a few days after development of the gateroad entries and continued during passage of the longwall panels on both sides of the entry.Monitoring included overcore stress measurements of the initial stress within the rock mass, changes in cable bolt loading, standing support pressure, roof deformation, rib deformation,stress changes in the coal pillar, and changes in the full three-dimensional stress tensor within the rock mass at six locations around the monitoring site.During the passage of the first longwall, stress measurements in the rock and coal detected minor changes in loading while minor changes were detected in roof deformation.As a result of the relatively favorable stress and geological conditions, the support systems did not experience severe loading or rock deformation until the second panel approached within 10–15 m of the instrumented locations.After reaching the peak loading at about 50–75 mm of roof sag, the cable bolts started to unload, and load was transferred to the standing supports.The standing support system was able to maintain an adequate opening inby the shields to provide ventilation to the first crosscut inby the face, as designed.The results were used to calibrate modeled cable bolt response to field data, and to validate numerical modeling procedures that have been developed to evaluate entry support systems.It is concluded that the support system was more than adequate to control the roof of the tailgate up to the longwall face location.The monitoring results have provided valuable data for the development and validation of support design strategies for longwall tailgate entries. 展开更多
关键词 LONGWALL MINING SUPPORT Tailgate Monitoring COAL MINING
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Features of long-term health monitored strains of a bridge with wavelet analysis 被引量:3
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作者 Zejia Liu,Bin Jiang,Liqun Tang,Yiping Liu,Chunyu Zhang,and Yinghua Li School of Civil Engineering and Transportation,State Key Laboratory of Subtropical Building Science,South China University of Technology,Guangzhou 510640,China 《Theoretical & Applied Mechanics Letters》 CAS 2011年第5期27-30,共4页
This paper analyses the five years’ monitored strains collected from a long-term health monitoring system installed on a bridge with wavelet transform.In the analysis,the monitored strains are pre-processed,features ... This paper analyses the five years’ monitored strains collected from a long-term health monitoring system installed on a bridge with wavelet transform.In the analysis,the monitored strains are pre-processed,features of the monitored data are summarized briefly.The influences of the base functions on the results of wavelet analysis are studied simultaneously.The results show that the db wavelet is a good mother wavelet function in the analysis,and the order N should be larger than 20,but less than 46 in decomposing the monitored strains of the bridge.According to the strain variation features of concrete bridge,the proper decomposition level is 4 in the wavelet multi-resolution analysis.With the present method,the strains caused by random loads and daily sunlight can be accurately extracted from the monitored strains.The decomposed components of the monitored strains show that the amplitudes of the strains caused by random loads,daily sunlight,and annual temperature effect,are about 5 με,25 με,and 50 με respectively.The structural response under random load is smaller than the other parts. 展开更多
关键词 health monitoring systems wavelet analysis signal processing BRIDGE
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Distribution changes of woody plants in Western Iran as monitored by remote sensing and geographical information system:a case study of Zagros forest 被引量:1
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作者 Mansour Karkon Varnosfaderani Rasoul Kharazmi +3 位作者 Aliakbar Nazari Samani Mohammad Reza Rahdari Seid Hamid Matinkhah Nasrollah Aslinezhad 《Journal of Forestry Research》 SCIE CAS CSCD 2017年第1期145-153,共9页
The status of woody plants in dry-land systems is a fundamental determinant of key ecosystem processes. Monitoring of this status plays an important role in understanding the dynamics of woody plants in arid and semi-... The status of woody plants in dry-land systems is a fundamental determinant of key ecosystem processes. Monitoring of this status plays an important role in understanding the dynamics of woody plants in arid and semi-arid ecosystems. The present study determined the dynamism of the Zagros forests in Iran using Remote Sensing and Geographic Information System techniques and statistical science. The results show that the density of trees varied from 10 to 53 % according to the physio- graphic and climatic conditions of semi-arid regions. The best and lowest correlation between vegetation indices and forest density were obtained for the global environmental monitoring index (GEMI; R2 = 0.94) and soil adjust vegetation index (R2 = 0.81), respectively. GEMI is used to monitor land use changes over a 10-year period. Results show that 2720 ha2 of forest have been destroyed by human interference and tillage on steep slopes during this period which also resulted in the loss of the fertile soil layer. GEMI determined the areas with a biomass of trees and could normally separate border regions with low bio- mass density of trees from regions without canopy cover. The results revealed that assessment of forest and vegetation cover in arid and semi-arid arduous forest regions using satellite digital numbers and ordinary sampling is subject to uncertainty. A stratified grouping procedure should be established to increase the accuracy of assessment. 展开更多
关键词 Monitoring Woody plants Vegetation index RS GIS Zagros forest Iran
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Natural and artificial landscape change in a Dutch Estuary: Partially monitored with low budget method (a study in the fourth dimension) 被引量:1
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作者 Isaak Zonneveld 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2003年第2期152-154,共3页
This study includes some aspects of the shift in the Dutch attitude in relation to water during the past millennia from defense to attack to keeping the balance(“co-evolution'). It has a special focus on the fres... This study includes some aspects of the shift in the Dutch attitude in relation to water during the past millennia from defense to attack to keeping the balance(“co-evolution'). It has a special focus on the freshwater tidal part, which embraces the largest seaport of the world: Rotterdam, as well as the largest national park of the Netherlands. It reports especially about a young mans endeavor in half a century real time monitoring of some land(scape) units with simple means. 展开更多
关键词 LANDSCAPE Dutch Estuary low budget method landscape monitoring
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Time-varying Reliability Analysis of Long-span Continuous Rigid Frame bridge under Cantilever Construction Stage based on the Monitored Strain Data 被引量:1
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作者 Yinghua Li Kesheng Peng +1 位作者 Lurong Cai Junyong He 《Journal of Architectural Environment & Structural Engineering Research》 2020年第1期5-16,共12页
In general,the material properties,loads,resistance of the prestressed concrete continuous rigid frame bridge in different construction stages are time-varying.So,it is essential to monitor the internal force state wh... In general,the material properties,loads,resistance of the prestressed concrete continuous rigid frame bridge in different construction stages are time-varying.So,it is essential to monitor the internal force state when the bridge is in construction.Among them,how to assess the safety is one of the challenges.As the continuous monitoring over a long-term period can increase the reliability of the assessment,so,based on a large number of monitored strain data collected from the structural health monitoring system(SHMS)during construction,a calculation method of the punctiform time-varying reliability is proposed in this paper to evaluate the stress state of this type bridge in cantilever construction stage by using the basic reliability theory.At the same time,the optimal stress distribution function in the bridge mid-span base plate is determined when the bridge is closed.This method can provide basis and direction for the internal force control of this type bridge in construction process.So,it can reduce the bridge safety and quality accidents in construction stages. 展开更多
关键词 Continuous rigid frame bridge Structural health monitoring Construction stage Punctiform time-varying reliability Strain data preprocessing
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Multiobjective maintenance optimization of the continuously monitored deterioration system
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作者 Changyou Li Minqiang Xu +1 位作者 Song Guo Rixin Wang 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2010年第5期791-797,共7页
With the development of the monitoring technology,it is more and more common that the system is continuously monitored.Therefore,the research on the maintenance optimization of the continuously monitored deterioration... With the development of the monitoring technology,it is more and more common that the system is continuously monitored.Therefore,the research on the maintenance optimization of the continuously monitored deterioration system is important.The deterioration process of the discussed system is described by a Gamma process.The predictive maintenance is considered to be imperfect and formulated.The expected interval of two continuous preventive maintenances is derived.Then,the maintenance optimization model of the continuously monitored deterioration system is presented.In the model,the minimization of the expected operational cost per unit time and the maximization of the system availability are the optimization objectives.The improved ideal point method with the normalized objective functions is employed to solve the proposed model.The validity and sensitivity of the proposed multiobjective maintenance optimization model are analyzed by a numerical example. 展开更多
关键词 monitoring continuously multiobjective decision maintenance optimization AVAILABILITY COST normalized ideal point method.
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Maintenance Management Research of a Large-span Continuous Rigid Frame Bridge Based on Reliability Assessment by Using Strain Monitored Data 被引量:1
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作者 Yinghua Li Kesheng Peng +2 位作者 Junyong He Qiangjun Shuai Gang Zou 《Journal of Architectural Environment & Structural Engineering Research》 2021年第2期20-31,共12页
When the bridge components needing maintenance are the world problem at present,and the health monitoring system is considered to be a very help­ful tool for solving this problem.In this paper,a large number of s... When the bridge components needing maintenance are the world problem at present,and the health monitoring system is considered to be a very help­ful tool for solving this problem.In this paper,a large number of strain data acquired from the structural health monitoring system(SHMS)installed on a continuous rigid frame bridge are adopted to do reliability assessment.Firstly,a calculation method of punctiform time-dependent reliability is proposed based on the basic reliability theory,and introduced how to cal­culate reliability of the bridge by using the stress data transformed from the strain data.Secondly,combined with“Three Sigma”principle and the basic pressure safety reserve requirement,the critical load effects distribu­tion function of the bridge is defined,and then the maintenance reliability threshold for controlling the unfavorable load state which appears in the early operation stage of this type bridge is suggested,and then the combi­nation of bridge maintenance management and health monitoring system is realized.Finally,the transformed stress distribution certifies that the load effects of concrete bridges practically have a normal distribution;as for the concrete continuous rigid frame bridge with C50 strength grade concrete,the retrofit reliability threshold should be valued at 6.13.The methodology suggested in this article can help bridge engineers do effective maintenance of bridges,which can effectively extend the service life of the bridge and bring better economic and social benefits. 展开更多
关键词 Structural health monitoring Punctiform time-varying reliability Critical load effects distribution function Maintenance reliability threshold Continuous rigid frame bridge “Three Sigma”principle
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Pathogenesis, diagnosis, and treatment of epilepsy: electromagnetic stimulation-mediated neuromodulation therapy and new technologies
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作者 Dian Jiao Lai Xu +3 位作者 Zhen Gu Hua Yan Dingding Shen Xiaosong Gu 《Neural Regeneration Research》 SCIE CAS 2025年第4期917-935,共19页
Epilepsy is a severe,relapsing,and multifactorial neurological disorder.Studies regarding the accurate diagnosis,prognosis,and in-depth pathogenesis are crucial for the precise and effective treatment of epilepsy.The ... Epilepsy is a severe,relapsing,and multifactorial neurological disorder.Studies regarding the accurate diagnosis,prognosis,and in-depth pathogenesis are crucial for the precise and effective treatment of epilepsy.The pathogenesis of epilepsy is complex and involves alterations in variables such as gene expression,protein expression,ion channel activity,energy metabolites,and gut microbiota composition.Satisfactory results are lacking for conventional treatments for epilepsy.Surgical resection of lesions,drug therapy,and non-drug interventions are mainly used in clinical practice to treat pain associated with epilepsy.Non-pharmacological treatments,such as a ketogenic diet,gene therapy for nerve regeneration,and neural regulation,are currently areas of research focus.This review provides a comprehensive overview of the pathogenesis,diagnostic methods,and treatments of epilepsy.It also elaborates on the theoretical basis,treatment modes,and effects of invasive nerve stimulation in neurotherapy,including percutaneous vagus nerve stimulation,deep brain electrical stimulation,repetitive nerve electrical stimulation,in addition to non-invasive transcranial magnetic stimulation and transcranial direct current stimulation.Numerous studies have shown that electromagnetic stimulation-mediated neuromodulation therapy can markedly improve neurological function and reduce the frequency of epileptic seizures.Additionally,many new technologies for the diagnosis and treatment of epilepsy are being explored.However,current research is mainly focused on analyzing patients’clinical manifestations and exploring relevant diagnostic and treatment methods to study the pathogenesis at a molecular level,which has led to a lack of consensus regarding the mechanisms related to the disease. 展开更多
关键词 DIAGNOSIS drug treatment ELECTROENCEPHALOGRAPHY epilepsy monitoring EPILEPSY nerve regeneration NEUROSTIMULATION non-drug interventions PATHOGENESIS prediction
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Assessing the corrosion protection property of coatings loaded with corrosion inhibitors using the real-time atmospheric corrosion monitoring technique
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作者 Xiaoxue Wang Lulu Jin +8 位作者 Jinke Wang Rongqiao Wang Xiuchun Liu Kai Gao Jingli Sun Yong Yuan Lingwei Ma Hongchang Qian Dawei Zhang 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS 2025年第1期119-126,共8页
The atmospheric corrosion monitoring(ACM)technique has been widely employed to track the real-time corrosion behavior of metal materials.However,limited studies have applied ACM to the corrosion protection properties ... The atmospheric corrosion monitoring(ACM)technique has been widely employed to track the real-time corrosion behavior of metal materials.However,limited studies have applied ACM to the corrosion protection properties of organic coatings.This study compared a bare epoxy coating with one containing zinc phosphate corrosion inhibitors,both applied on ACM sensors,to observe their corrosion protection properties over time.Coatings with artificial damage via scratches were exposed to immersion and alternating dry and wet environments,which allowed for monitoring galvanic corrosion currents in real-time.Throughout the corrosion tests,the ACM currents of the zinc phosphate/epoxy coating were considerably lower than those of the blank epoxy coating.The trend in ACM current variations closely matched the results obtained from regular electrochemical tests and surface analysis.This alignment highlights the potential of the ACM technique in evaluating the corrosion protection capabilities of organic coatings.Compared with the blank epoxy coating,the zinc phosphate/epoxy coating showed much-decreased ACM current values that confirmed the effective inhibition of zinc phosphate against steel corrosion beneath the damaged coating. 展开更多
关键词 atmospheric corrosion monitoring technology corrosion inhibitor COATING carbon steel corrosion protection
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Monitored anesthesia care and asleep-awake-asleep techniques combined with multiple monitoring for resection of gliomas in eloquent brain areas:a retrospective analysis of 225 patients
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作者 San-Zhong Li Ning Su +8 位作者 Shuang Wu Xiao-Wei Fei Xin He Jiu-Xiang Zhang Xiao-Hui Wang Hao-Peng Zhang Xiao-Guang Bai Guang Cheng Zhou Fei 《Chinese Neurosurgical Journal》 CAS CSCD 2023年第2期88-97,共10页
Background:Awake craniotomy(AC)has become gold standard in surgical resection of gliomas located in eloquent areas.The conscious sedation techniques in AC include both monitored anesthesia care(MAC)and asleep-awake-as... Background:Awake craniotomy(AC)has become gold standard in surgical resection of gliomas located in eloquent areas.The conscious sedation techniques in AC include both monitored anesthesia care(MAC)and asleep-awake-asleep(AAA).The choice of optimal anesthetic method depends on the preferences of the surgical team(mainly anesthesiologist and neurosurgeon).The aim of this study was to compare the difference in physiological and blood gas data,dosage of different drugs,the probability of switching to endotracheal intubation,and extent of tumor resection and dysfunction after operation between AAA and MAC anesthetic management for resection of gliomas in eloquent brain areas.Methods:Two-hundred and twenty-five patients with super-tentorial tumor located in eloquent areas underwent AC from 2009 to 2021 in Xijing Hospital.Forty-one patients underwent AAA technique,and the rest one-hundred eighty-four patients underwent MAC technique.Anesthetic management,dosage of different drugs,intraoperative complications,postoperative outcomes,adverse events,extent of resection and motor,and sensory and language dysfunction after operation were compared between MAC and AAA.Result:There was no significant difference in gender,KPS score,MMSE score,glioma grade,type,and growth site between the patients in the two groups,except the older age of patients in MAC group than that in AAA group.During the whole process of operation,there were greater pulse pressure difference(P=0.046),shorter operation time(P=0.039),less dosage of remifentanil(P=0.000),more dosage of dexmedetomidine(P=0.013),more use of antiemetics(81%,P=0.0067),lower use of vasoactive agent(45.1%,P=0.010),and lower probability of conversion to general anesthesia(GA,P=0.027)in MAC group than that in AAA group.Blood gas analysis showed that PetCO2(P=0.000),Glu concentration(P=0.000),and PaCO2(P=0.000)were higher,but SPO2(P=0.002)and PaO2(P=0.000)were lower in MAC group than that in AAA group.In the postoperative recovery stage,compared with that of AAA group,the probability of dysfunction in MAC group at 1,3,5,and 7 days after operation was lower,which were 27.8%vs 53.6%(P=0.003),31%vs 68.3%(P=0.000),28.8%vs 63.4%(P=0.000),and 25.6%vs 58.5%(P=0.000),respectively.Conclusion:Compared with AAA,it seems that MAC has more advantages in the management for resection of gliomas in eloquent brain areas,and MAC combined with multiple monitoring such as cerebral cortical mapping,neuronavigation,and ultrasonic detection is worthy of popularization for the resection of gliomas in eloquent brain areas. 展开更多
关键词 monitored anesthesia care(MAC) Asleep-awake-asleep(AAA) Retrospective analysis Eloquent areas GLIOMAS
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Pricing Continuously Monitored Barrier Options under the SABR Model:A Closed‐Form Approximation
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作者 Nian Yang Yanchu Liu Zhenyu Cui 《Journal of Management Science and Engineering》 2017年第2期116-131,共16页
The stochastic alpha beta rho(SABR)model introduced by Hagan et al.(2002)is widely used in both fixed income and the foreign exchange(FX)markets.Continuously monitored barrier option contracts are among the most popul... The stochastic alpha beta rho(SABR)model introduced by Hagan et al.(2002)is widely used in both fixed income and the foreign exchange(FX)markets.Continuously monitored barrier option contracts are among the most popular derivative contracts in the FX markets.In this paper,we develop closed-form formulas to approximate various types of barrier option prices(down-and-out/in,up-and-out/in)under the SABR model.We first derive an approximate formula for the survival density.The barrier option price is the one-dimensional integral of its payoff function and the survival density,which can be easily implemented and quickly evaluated.The approximation error of the survival density is also analyzed.To the best of our knowledge,it is the first time that analytical(approximate)formulas for the survival density and the barrier option prices for the SABR model are derived.Numerical experiments demonstrate the validity and efficiency of these formulas. 展开更多
关键词 SABR model Continuously monitored barrier option Survival density Closed‐form approximation Stochastic volatility
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Crustal motion of Chinese mainland monitored by GPS 被引量:10
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作者 朱文耀 王小亚 +12 位作者 程宗颐 熊永清 张强 叶叔华 马宗晋 陈俊勇 许厚泽 魏子卿 赖锡安 刘经南 金标仁 任金卫 王琪 《Science China Earth Sciences》 SCIE EI CAS 2000年第4期394-400,共7页
: To measure and monitor the crustal motion in China, a GPS network has been established with an average side length of 1 000 km and with more than 20 points on the margins of each major tectonic block and fault zone ... : To measure and monitor the crustal motion in China, a GPS network has been established with an average side length of 1 000 km and with more than 20 points on the margins of each major tectonic block and fault zone in China. Three campaigns were carried out in 1992,1994 and 1996, respectively by this network. Here we present, for the first time, the horizontal displacement rates of 22 GPS monitoring stations distributed over the whole China and global IGS stations surrounding China, based on these GPS repeated measurements. From these results by GPS, we have obtained the sketch of crustal motion in China. 展开更多
关键词 CRUSTAL MOTION in China GPS monitoring.
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