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In this paper a genetic algorithm four-dimension data assimilation system was applied to the more complex MM5 model, we verify the performance of the genetic algorithm assimilation system, we take the a heavy rainfall process during 04-05, July, 2003 as the experimental research object, and carry out data assimilation experiment of actual observation data, compare the experimental results of the genetic algorithm assimilation system and MM5 adjoint model assimilation system with the experimental results without assimilation, the following is the result:genetic algorithm assimilation system is used not only in a barotropic primitive equation but also in the complex model, MM5, for example, in the ideal experiment the result of the genetic algorithm assimilation system is better than the MM5 adjoint model assimilation system, in the assimilation experiment of actual observation data, whichever assimilation system is used, the initial field of numerical prediction model is effectively improved and the prediction effect of physical field and rainfall are somewhat enhanced.
本文将遗传算法的四维同化系统运用到更复杂的MM5模式中,在理想实验中验证遗传算法同化系统的性能,并以2003年7月4日"南京暴雨"作为研究对象,进行了实际观测资料的同化,并将遗传算法同化系统和MM5伴随模式同化系统得到的结果跟未同化的结果进行了比较,结果如下:遗传算法同化系统不仅可以用在正压原始方程模式上,同样也可以用在MM5等复杂模式上,理想实验证明了遗传算法同化系统优于MM5伴随同化系统,在实际观测资料同化中,采用两种方法的同化系统都能有效地改善数值预报模式的初始场,能在一定程度上提高物理量场和降水量的预报效果。
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Results: All rats in experiment group devloped CAG at the end of 12 weeks with the following Pathological changes of CAG such as thin mucosa layer, thick muscle layer, decreased glandes, soakaging inflammation cells in microscope and with the time prolonging, the atrophy of gastric mucosa became more serious; In normal control group and normal feeding group, the IL-6 and IL-8 content in blood serum are the same at every time point; In experiment group, IL-6 became increased from 4wk and kept high level from 4wk to l2wk and had significant difference compared with normal controls.
结果:灌胃至12wk时出现胃粘膜层变薄,固有层腺体减少,固有层纤维结缔组织增生,粘膜肌层明显增生,慢性炎细胞浸润等萎缩性胃炎表现,随著热盐水灌胃时间的延长,32wk胃粘膜萎缩程度明显加重;正常对照组和正常餵养组大鼠各时间点血清IL-6,IL-8含量基本相同。
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The system terminal is designed to discern the identity to experiment operator through reading the IC card, and gather corresponding terminal operation information , through the communication with the control centre, realize a series of intelligent management of laboratory ,such as the platform power of the experiment opened automatically , long-range experiment performance rating and labware maintaining,etc..
系统终端主要设计用来通过读取IC卡对实验人进行身份识别,并采集相应的终端操作信息,通过与控制中心的通信,实现实验平台电源自动开启,远程实验成绩评定,实验室设备的科学维护等一系列实验室智能化管理。
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The three steps are feasibility experiment, match experiment of the main effect factors and experiment of oil indraft performance. During the experiments, for the complexity of flow field inside the shell, we had encountered with many difficult problems.
3根据溢油回收人工水母装置模型的旋涡理论分析,从简单到复杂设计了三个不同阶段的试验方案;可行性试验、主要参数匹配试验和吸油特性试验。
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Structural Experiment is a basic subject in the Structural Engineering Major, which weighs heavy to the studying researchers on the experimental data accompanied by the former researchers" achievement and lucubration. And the experimental scope is expanding wider, so that making full use of each laboratory"s experimental equipment to conduct the collaborative experiment is also the developing trend. With the rapid development of the computer and network technology, hardware technique has provided the accessible condition for the Structural Experiment, and database technique has offered the convenience and possibility for the experimental results and datas save and data exchange.
结构实验是结构工程专业的一门基础学科,而且随着研究的深入,前人的研究成果,特别是研究试验数据对于继续研究的人员来说有特别重要的意义,并且实验规模也在不断扩大,充分利用各个实验室的实验设备条件进行协同实验也是发展趋势,随着计算机技术以及网络技术的飞速发展,硬件技术都为这一切提供了可行的条件,数据库技术为结构实验提供了保存实验结果、实验数据以及实验数据交换提供了便利和可能。
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In the temperature sensing, the theory of fiber Bragg grating temperature sensing has first been proposed, the characteristic of the FBG temperature sensing was analyzed, it was deduced that the sensitivity coefficients of first-order and second-order ,and experimental findings was protracted, the gained polynomial better inosculate with the theory value. The experiment was processed in the low temperature , the thermo-optic coefficient was emended in the polynomial of the normal temperature ,the result was accorded with the sensing character of the normal and low temperature ,and it was resolved that the theory account of the normal and low temperature did not accord with the experiment.
在温度传感方面,主要从光纤布拉格光栅的温度传感模式出发,对光纤布拉格光栅的温度传感特性进行了分析,推导出了光纤光栅的一阶与二阶温度灵敏度系数,并对实验数据进行了拟和,所得多项式和理论值吻合的很好,并对低温传感进行了实验,将在常温下得出的多项式进行了热光系数的修正,所得的结果同时符合常温与低温的传感特性,解决了低温与常温情况下的理论计算与实验的不一致性。
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According to local resources linking with the reality of teaching in analytic Chemistry experiment, the au lay the reform plan of teaching in analytic chemistry experiment and suggest to classify the course of analytic chemistry experiment.
结合资源,联系分析化学实验教学现状,提出了分析化学实验教学的改革计划方案。主张将分析化学实验课程分为三个层次:基础分析实验———实际应用型实验———知识创新型实验
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This article that focuses on the systematic and in-depth research in the current primal problem about abnormal burst pressure reservoir depress burst pressure has procured following main fruits:1 It forms the method which could obtain massive vertical static state mechanics parameters.2 In a foundation of acquisition of rock mechanics parameters,apply bent lamella that as mechanical model along with characteristic of actual geologic characteristics to analysis curvature for anticlinal strcture, get homologous tectonic stress value throug relation between the curvature and stress and different principal curvature in anticlinal structure,consequently set up laminational stress model for anticline reservoir. The block lamination for existed fracturing date has formed method of setting up mechanical model of lamination terrestrial stress by abtaining the block tectonic stress coefficients which are got by complex utilization test, laboratory test and fracturing date playback.3 Analysesing the main reason which lead to high burst pressure by considering the characteristic of reservoir geology,reservoir,and rock mechanics and reservoir damage,etc.Establishing burst pressure quantitative prediction model which provide gist for depressing construction risk and optimizing construction craft under the condition of open hole completion ,gun-perforated completion and damaged reservoir.4 Provding theoretical basis for interpreting acidification pretreatment which could depress busrt pressure by finding the relation between the influencing factors and rock machanics parameters and analysing the factors that have effect on rock mechanics parameters. Expounding the mechanism of reaction of mixed monomineral and acid from the angle of microcosmic element, evaluating quantitatively acid sensilility of different kinds of mineral effectively, and determing the first-order reaction dynamical equation of each mineral.5 Revealing rock mechanics property chage as a result of acid flooding in different condition by sandstone traumata experiment in different temperatures which combined with rock mechanics triaxial stress experiment.6 Associating damage mechanics with sandstone acidizing, established sandstone damage mechanics model in the foundation of the recognition on the rock mechanics parametric variation which is caused by acid-rock reaction in both macroscopic view and microscopic view ,also demonstrated those processes and quantitative estimated the acid busrt pressure to direct the site operation.
本文针对目前异常破裂压力储层降低破裂压力的主要问题展开较为系统和深入的研究,取得了以下主要成果:1形成了利用测井资料,结合室内岩芯测试结果,获取静动岩石力学参数的相关性特征,从而获得纵向上大量静态力学参数的方法。2在获取了岩石力学参数的此基础上,利用弯曲薄板作为力学模型,结合区块实际地质特征对背斜构造进行曲率分析,通过曲率与应力的关系,利用背斜构造不同部位的主曲率求得相应的构造应力值,从而建立起背斜储层的分层应力模型;对已有压裂资料的区块分层,形成了综合利用测试、室内实验、压裂资料反演获得该区块构造应力系数,建立起分层地应力的力学模型的方法。3综合考虑储层地质、油藏、岩石力学特性和储层伤害等因素,分析造成高破裂压力的主要原因,综合利用岩石力学、弹性力学等知识,建立了裸眼完井、射孔完井条件下以及储层受到伤害后的储层破裂压力定量预测模型,为降低施工风险和优化施工工艺提供了依据。4完成了物性、岩性影响岩石力学参数的因素分析,找出了各影响因素和岩石力学参数之间的关系,为从机理上解释酸化预处理降低破裂压力提供了理论基础;从微观元素的角度阐述了单矿物与酸反应的机理;并在此基础上,有效评价了各种矿物的酸敏感性,定量确定了岩石中各矿物的一级反应动力学方程。5完成了不同温度下的酸液类型、酸液浓度、注酸量等一系列砂岩损伤实验,结合岩石力学三轴应力实验,系统揭示了在不同条件下注酸而引起的岩石力学性质变化。6将损伤力学与砂岩酸化相结合,在宏观、微观两个方面认识酸岩反应引起岩石力学参数变化基础上,建立了砂岩损伤力学模型,并对其进行验证,在此基础上定量计算酸化后的破裂压力,有效指导现场施工
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Environment radon is mainly from rock and soil in geological environment, but the research is not connected with geological environment now. On the basis of physical field, the theoretical distribution model of radon in soil and exchange model of earth—air are set up by using Fick diffusion law and Dacy law, and then the research of environment radon is linked with geological environment. This paper described how the evry parameter of the theoretical model influence the radon concentration in air. The results of research indicat that molecule diffusion of radon is different from it's eddy form. Under the condition of surface radon source, the model experiment is used to study the transportation and distribution of radon in medium. The data of experiment show the relationship between radon and depth can be described by exponent. If the radioelement is well—distributtion, the concentration of radon in different depth or in different point at the same depth change with time, but the accumulated exhalation amount of radon at different point on the surface of model are close in relative long time. The author studied the exchange of radon between mediums and verified the theoretical models too.
环境氡主要来自岩石、土壤,而目前环境氡研究中与地质环境结合很少,为此作者以物理场为基础,运用气体运移的费克扩散定律和达西定律,建立起壤中氡浓度分布与大地—大气间氡交换理论模型,首次在理论上将环境氡与地质环境结合起来;论文中从理论上讨论了模型中各参数对空气中氡浓度的影响,发现空气中氡运移的分子扩散方式和湍流扩散方式存在明显差异;通过面状氡源条件下的氡运移模型实验,研究了介质中氡的运移与分布,实验数据表明氡浓度随深度的变化规律可用指数函数描述,在放射性元素分布均匀的条件下,介质中不同深度和同一深度不同点的氡浓度随时间而变,但介质表面不同点在较长时间内向空气中累计释放的氡的量是相近的;同时研究了不同介质间氡的交换,并验证了所建立的理论模型;运用理论模型预测青岛市城区壤中氡浓度、江西临川一住宅区空气中氡浓度及江西二个测区的区域空气中氡浓度分布,取得了较好的效果。
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After finishing holistic analyses, and considering the specific and relative research on database technique"s application in the remote structural collaborative experiment, this thesis explores and discusses that the proposed database organization scheme can promote the efficiency of the data"s reposting in the Remote Structural Collaborative Experiment, the efficiency of the remote data exchange, and puts out the improving design compared with the NCREE system, that is to use middleware to realize the separation of the experimental process and DBMS and to set up buffer pool to solve the problems, such as to solve network replacement by getting back the experiment.
在完成了整体分析设计之后,针对数据库技术在远程结构协同实验中的应用作了具体的相关研究,探讨了本文提出的数据库组织方案在远程协同实验中可以提高数据入库效率以及远程数据交换效率以及对比NCREE系统设计提出了改进的设计思想,即采用中间件以实现试验进程与DBMS分离以及设立缓冲池以解决网络复位而要恢复试验等问题,并且还研究了在协同实验中分析中的常用数值积分算法,并着重探讨分析了算子分裂算法。
- 推荐网络例句
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According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.
曝气设备的动力效率在叶轮转速为120rpm~150rpm时取得最大值,此时氧利用率和充氧能力也具有较高值。
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The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.
稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世,形体几无变化。
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When I was in school, the rabbi explained everythingin the Bible two different ways.
当我上学的时候,老师解释《圣经》用两种不同的方法。