体温过低对豚鼠耳蜗电图-脑干听觉诱发电位综合波的影响

目的：探讨体温过低对耳蜗电图-脑干听觉诱发电位综合波(ECochG-BAEP SW)的影响。方法：体表物理降温法逐步降低豚鼠体温(36～25℃)，观察脑干听觉诱发电位(BAEP)、耳蜗电图(ECochG)和ECochG—BAEPSW的波形、波峰潜伏期(PL)、波峰间潜伏期(IPL)和波幅随体温降低的变化。结果：从体温36℃到25℃，ECochG-BAEPSW波形始终兼具：BAEP和ECochG两者的特点，有十分明显突出的1波；与BAEP和ECochG一致，ECochG-BAEPSW的PL和IPL随体温降低而逐步延长；与BAEP的Ⅰ、Ⅱ、Ⅲ波和ECochG的N1、N2波波幅相似，ECochG-BAEPSW的1、2、3波波幅也在体温过低至30～29℃开始出现显著降低。结论：体温过低时ECochG-BAEP SW有BAEP和ECochG相似的显著改变，且始终兼具两者波形特点。     

脑干听觉诱发电位对高血脂病人的诊断应用

目的:探讨脑干听觉诱发电位(BAEP)检查用于高血脂的诊断价值。方法:对76例高血脂病例和54例血脂正常者进行BAEP检查进行比对。结果:高血脂组与对照组BAEP测定的潜伏期(PL)和波间期(IPL)均检出异常。结论:血脂增高对听力障碍有很大影响。BAEP检查对该病有一定的诊断价值。     

糖尿病大鼠脑干听觉诱发电位波幅间比率的动态变化

目的：探讨脑干听觉诱发电位(BAEP)的波幅问比率在糖尿病大鼠中的动态变化。方法：采用链脲佐菌素(SIZ)腹腔注射法，建立实验性糖尿病(ED)动物模型。在成模前后按时间顺序连续10周动态观测BAEP的波幅间比率的变化。结果：与正常对照组相比，ED组大鼠在病程2周时出现BAEP Ⅰ、Ⅲ、Ⅳ、Ⅴ波幅增高；在病程4周时出现BAEP各波波幅增高；病程6周时BAEP Ⅰ、Ⅱ、Ⅲ、Ⅳ波幅增高；病程8～10周时：BAEP Ⅰ、Ⅲ、Ⅳ、Ⅴ波幅增高。病程8周后BAEPⅤ／Ⅰ波幅比率下降；病程10周后BAEPⅢ与Ⅴ波幅比率降低；Ⅴ与Ⅰ、Ⅳ与Ⅰ波幅比率明显降低。结论：糖尿病大鼠BAEP的波幅和波幅比率有明显变化，这有助于糖尿病中枢神经病变的早期诊断。     

体温过低对大鼠脑干听觉诱发电位快慢成分的影响

目的：探讨体温过低对大鼠脑干听觉诱发电位快慢成分的影响。方法：计算机平均叠加技术颅表记录大鼠脑干听觉诱发电位（BAEP）快慢成分，体表物理降温法逐渐降低大鼠体温，传感探头式数字体温计监测大鼠直肠温度，体温每降低1℃测试1次BAEP快慢成分，观察波峰潜伏期（PL）、波峰间潜伏期（IPL）和波幅的变化。结果：随体温逐渐降低（36－25℃），BAEP快慢成分PL逐渐延长，快成分I－Ⅲ、Ⅱ-Ⅳ和I－Ⅳ IPL也逐渐延长，但两者波幅未随体温降低而发生规律性显著变化。结论：体温过低对大鼠BAEP的快慢成分均有显著影响。     

针刺配合穴位注射对小头畸形儿童智商、脑干听觉诱发电位的影响

目的:观察针刺配合穴位注射对小头畸形儿童智商(IQ)、脑干听觉诱发电位(BAEP)的影响,并分析其相关性。方法:治疗小头畸形儿童32例,针刺以头三针为主,配合体针及穴位注射疗法。治疗前后对患儿进行智商(IQ)、脑干听觉诱发电位(BAEP)的测定。结果:治疗后患儿言语IQ、操作IQ和总IQ均有明显提高(P<0.01);BAEP有改善者20例,无改善者12例,且BAEP改善与IQ提高的肯德尔(Kendall)等级相关系数tau_b=0.515(P<0.01)。结论:针刺配合穴位注射可明显提高小头畸形儿童IQ水平,改善异常的BAEP,且BAEP的改善与IQ的提高具有相关性。     

普通大学生与体育系大学生脑干听诱发电位的研究

本文对普通大学生与体育系大学生脑干听觉诱发电位进行了初步的研究,结果表明:(1)人体左右两耳脑干听诱发电位各波间没有明显差异;(2)体育组峰潜伏期、波间时程(除Ⅰ、Ⅱ和Ⅲ—Ⅴ)较普通组延长,波幅较普通组增高。     

动态脑电图联合脑干听觉诱发电位在脑卒中患者预后评估中的应用价值

目的探讨动态脑电图联合脑干听觉诱发电位在脑卒中患者预后评估中的应用价值.方法选取脑卒中患者152例,随机分为观察组和对照组,每组各76例.观察组患者选用动态脑电图结合脑干听觉诱发电位进行监测,对照组患者选用常规脑电图进行监测,对比两组患者预后评估结果和预后评估中价值.结果观察组患者中真阴性和真阳性的例数均明显多于对照组,差异具有统计学意义(P0.05);观察组患者中假阴性和假阳性的人数均明显少于对照组,差异具有统计学意义(P0.05).观察组患者检测的敏感性、特异性、错误率均明显高于对照组,准确率明显低于对照组,差异具有统计学意义(P0.05).结论动态脑电图联合脑干听觉诱发电位能够有效增加脑卒中患者预后评估的特异性和敏感性,提高评估的准确率,值得在临床治疗中推广使用.     

脑干听觉诱发电位波形分形建模,验证与算法优化

脑干听觉诱发电位是声觉器官受刺激后产生的一种生物电，反映了相应感觉通路及神经元群的活动，可用作听力阈值的客观判断，也可对多种耳疾和脑部病变作出诊断，因而成为当今临床医学和生物医学信号处理中的一个重要课题。文中介绍了脑干听觉诱发电位潜伏期（Ｌ）与刺激声强（Ｉ）之间关系曲线的作用，及其拟合建模和回归算法优化，还用实例数据对选定的拟合曲线模型进行了回归方差分析验证。     

椎基底动脉缺血的脑干听觉诱发电位98例临床分析

目的：为了解椎基底动脉缺血患者的脑干听觉诱发电位的改变．方法：使用国产广州威迭公司WD-4000型肌电图，诱发电位仪对98例椎基底动脉缺血的患者进行检查．结果：异常率为65.21％，其中以Ⅲ～Ⅴ波间期延长显著。其次为Ⅲ～Ⅴ／Ⅰ～Ⅲ波型改变。异常率分别为59.11％和53％，同时本检查还显示1侧耳异常．结论：脑干听觉诱发电位的测定时椎基底动脉缺血患者的诊断有一定的帮助．     

脑干听觉诱发电位波形分析建模、验证与算法优化

脑干听觉诱发电位是声觉器官受刺激后产生的一种生物电，反映了相应感觉通路及神经元群的活动，可用作听力阈值的客观判断，也可对多种耳疾和脑部病变作出诊断，因而成为当今临床医学和生物医学信号处理中的一个重要课题．文中介绍了脑干听觉诱发电位潜伏期（Ｌ）与刺激声强（Ｉ）之间关系曲线的作用，及其拟合建模和回归算法优化，还用实测数据对选定的拟合曲线模型进行了回归方差分析验证．     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

Exciton Seebeck in Molecular Systems

Various applications relevant to the exciton dynamics,such as the organic solar cell,the large-area organic light-emitting diodes and the thermoelectricity,are operating under temperature gradient.The potential abnormal behavior of the exicton dynamics driven by the temperature difference may affect the efficiency and performance of the corresponding devices.In the above situations,the exciton dynamics under temperature difference is mixed with     

Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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An on-line scaling method for improving scalability of a database cluster

The explosive growth of the Internet and database applications has driven database to be more scalable and available, and able to support on-line scaling without interrupting service. To support more client's queries without downtime and degrading the response time, more nodes have to be scaled up while the database is running. This paper presents the overview of scalable and available database that satisfies the above characteristics. And we propose a novel on-line scaling method. Our method improves the existing on-line scaling method for fast response time and higher throughputs. Our proposed method reduces unnecessary network use, i.e. , we decrease the number of data copy by reusing the backup data. Also, our on-line scaling operation can be processed parallel by selecting adequate nodes as new node. Our performance study shows that our method results in significant reduction in data copy time.     

An improved R-tree based on childnode''s probability

R-Tree is a good structure for spatial searching. But in this indexing structure,either the sequence of nodes in the same level or sequence of traveling these nodes when queries are made is random. Since the possibility that the object appears in different MBR which have the same parents node is different, if we make the subnode who has the most possibility be traveled first, the time cost will be decreased in most of the cases. In some case, the possibility of a point belong to a rectangle will shows direct proportion with the size of the rectangle. But this conclusion is based on an assumption that the objects are symmetrically distributing in the area and this assumption is not always coming into existence. Now we found a more direct parameter to scale the possibility and made a little change on the structure of R-tree, to increase the possibility of founding the satisfying answer in the front sub trees. We names this structure probability based arranged R-tree (PBAR-tree).     

Integrating GIS Web services based on mediating architecture

The geographic information service is enabled by the advancements in general Web service technology and the focused efforts of the OGC in defining XML-based Web GIS service. Based on these models, this paper addresses the issue of services chaining,the process of combining or pipelining results from several interoperable GIS Web Services to create a customized solution. This paper presents a mediated chaining architecture in which a specific service takes responsibility for performing the process that describes a service chain. We designed the Spatial Information Process Language (SIPL) for dynamic modeling and describing the service chain, also a prototype of the Spatial Information Process Execution Engine (SIPEE) is implemented for executing processes written in SIPL. Discussion of measures to improve the functionality and performance of such system will be included.     

Tracking data management using topology of moving object database system for moving object constrained trajectory in LBS application

Advances in wireless technologies and positioning technologies and spread of wireless devices, an interest in LBS (Location Based Service) is arising. To provide location based service, tracking data should have been stored in moving object database management system (called MODBMS) with proper policies and managed efficiently. So the methods which acquire the location information at regular time intervals then, store and manage have been studied. In this paper, we suggest tracking data management techniques using topology that is corresponding to the moving path of moving object. In our techniques, we update the MODBMS when moving object arrived at a street intersection or a curved road which is represented as the node in topology and predict the location at past and future with attribute of topology and linear function. In this technique, location data that are corresponding to the node in topology are stored, thus reduce the number of update and amount of data. Also in case predicting the location,because topology are used as well as existing location information, accuracy for prediction is increased than applying linear function or spline function.