Inverse Analysis Determining Interfacial Properties Between Metal Film And Ceramic Substrate With An Adhesive Layer

In the present study, peel tests and inverse analysis were performed to determine the interfacial mechanical parameters for the metal film/ceramic system with an epoxy interface layer between film and ceramic. Al films with a series of thicknesses between 20 and 250 mu m and three peel angles of 90 degrees, 135 degrees and 180 degrees were considered. A finite element model with the cohesive zone elements was used to simulate the peeling process. The finite element results were taken as the training data of a neural network in the inverse analysis. The interfacial cohesive energy and the separation strength can be determined based on the inverse analysis and peel experimental result.

亚轨道飞行器航程控制的末端能量管理方法

提出一种针对小能量亚轨道飞行器在无动力返回末端区域的多参数耦合、能量航向分离控制、动势能匹配衰减的精确控制的末端能量管理方法.以动能、势能作为约束条件,以航程作为优化指标,采用能量控制方法实时生成能量剖面,根据飞行器名义能量/航程在能量剖面中的位置确定迎角,最终生成三个姿态角.仿真结果表明用这种方法得到了良好的制导结果.

一种基于JMX的远程作业管理系统设计与实现

文章提出了一种新型远程作业管理系统框架.该框架基于JMX架构,融合了基于企业权限映射模型的安全机制、JSF（Java Server Face）的可视化框架等多项技术,有效地改进了传统的作业管理系统的可扩展性差、安全机制不足和缺乏统一、完善的系统管理三点不足.并基于该框架实现了国家863项目“远程作业管理系统”,实现了灵活的系统组件动态配置,基于企业权限映射模型的高安全和可视化管理界面,比较了实现系统和传统系统的优点,讨论了其中涉及到的关键技术.

一种面向TTCN-3测试系统的共享内存管理框架

为了提高TTCN-3测试组件间通信的性能,在基于TTCN-3的基础测试平台上设计并实现了一套支持动态切换内存管理策略的共享内存管理框架,并在该框架下实现了三套不同的共享内存分配和自动回收策略.框架能够根据系统运行时刻的共享内存统计特征在这些策略中选择性能预期最好的一套,并动态地将当前内存管理策略切换为该套方案.在基础测试平台上运行一系列并发测试用例表明,该框架能提升内存管理以及整个系统的平均性能.

eta production off the proton in a Regge-plus-chiral quark approach

A chiral constituent quark model approach, embodying s- and u-channel exchanges, complemented with a Reggeized treatment for the t channel is presented. A model is obtained allowing data for pi(-)p ->eta n and gamma p ->eta p to be described satisfactorily. For the latter reaction, recently released data by the CLAS and CBELSA/TAPS Collaborations in the system total energy range 1.6 less than or similar to W less than or similar to 2.8 GeV are well reproduced by the inclusion of Reggeized trajectories instead of simple. and. poles. The contribution from "missing" resonances, with masses below 2 GeV, is found to be negligible in the considered processes.

强流扇聚焦回旋加速器中空间电荷效应的研究

本文比较系统地介绍了扇聚焦回旋加速器内部的束流动力学及其注入系统的一般理论，并结合两台具体的扇聚焦回旋加速器的设计讨论了在回旋加速器以及静电反射镜内空间电荷效应对束流的影响。第一章简单介绍了回旋加速器的发展历史及分类、强流回旋加速器的应用，加速器驱动系统ADS(Accelerator Driving System)、能量放大器EA(Energy Amplifier)方案以及本文工作的主要内容。第二章首先介绍了扇聚焦回旋加速器的基本理论，包括扇聚焦回旋加速器内的轨道理论(静态平衡轨道及加速轨道性质)以及相空间的描述方法等。然后详细讨论了回旋加速器内空间电荷效应的影响及研究方法，包括空间电荷作用下粒子的运动方程、空间电荷电场的不同种类、求解空间电荷电场的基本方法和模型以及空间电荷效应对束流轨道特性和相空间传输特性的影响等。在本章的第4节中，介绍了两台强流扇聚焦回旋加速器(50MeV-6mA H_2~+超导扇聚焦回旋加速器和17MeV-2mA H~-扇聚焦回旋加速器)的具体设计步骤和计算结果,讨论了这两台扇聚焦回旋加速器中加速轨道和相空间的传输以及空间电荷效应的影响。最后，简单介绍了设计时所使用的两个计算程序AGORA_SCE和CINEZ_SCE。第三章首先简单介绍了用于扇聚焦回旋加速器的各种注入方法以及在轴向注入时所采用的不同种类的静电偏转镜。然后详细介绍了目前最常用的螺旋扇型静电偏转镜的基本工作原理，如参考粒子的运动轨道及偏转镜的光学性质等，讨论了螺旋线型静电偏转镜中空间电荷效应的影响。最后仍然以50MeV-6mAH_2~+和17MeV-2mA H~-这两台扇聚焦回旋加速器为例，对它们的静电偏转镜进行了设计，并分别研究了它们在空间电荷效应影响下的轨道特性及相空间传输特性。第四章简单介绍了工作中所用到的一些计算工具，如三维电磁场计算程序MAFIA以及等时场分析程序EQUIL，并给出了17MeV-2mA H~-扇聚焦回旋加速器的等时场的计算结果。论文的最后部分简单总结了本文的工作，并提出了今后进一步的工作设想。

Causes and consequences of changes in nutrient structure in the Jiaozhou Bay

Concentrations and ratios of nutrients in Jiaozhou Bay, China, have changed much in the past decades, with trends indicating an increase in nitrogen and a decrease in silicate. Statistical analysis has shown that the long-term variations of nutrients are associated with agricultural activities, precipitation, and anthropogenic factors. Stoichiometric calculations indicate that the nutrient structure has become more and more unbalanced. There has been almost no possibility for nitrogen limitation since the 1980s, the probability of P limitation has increased, and the probability of Si limitation has also increased markedly from the 1980s to the 1990s. As a consequence of changes in nutrient structure, a decrease in the abundance of net phytoplankton was evident, whereas total chlorophyll a levels have remained roughly unchanged at around 3.55 mu g/L. Thus, it is likely that smaller species have taken the niche vacated by the larger species. Changes in phytoplankton size and species composition may ultimately lead to various functional and structural changes at the system level.

基于以太网的工业控制网络

应用传统现场总线的工业控制网络无法实现办公室自动化与工业自动化的无缝结合 .由于以太网在确定性、速度和优先法则等方面性能的提高 ,阻碍以太网应用于实时控制环境的难点已被解决 .以太网早已成为商业管理网络的首要选择 ,那么它应用于企业现场设备控制层是控制网络发展的趋势 ,将极大地促进信息从传感器到管理层的集成

鞍钢冷轧厂制造执行系统研究

鞍钢新轧钢股份有限公司冷轧厂制造执行系统(MES)覆盖了从接收用户合同到产品发货的整个生产经营活动。接收用户合同后,系统自动生成优化的主生产计划、要料计划和机组作业计划,在生产过程中,系统对生产状况进行全面跟踪,对出现的异常情况进行合理调度,并且,冷轧MES与上游厂、公司ERP、过程控制系统和厂级管理系统连成一体,协同工作。该软件在实际应用中取得了令人满意的效果。

胜利勘探数据中心及勘探辅助决策系统研究

In the paper through extensive study and design, the technical plan for establishing the exploration database center is made to combine imported and self developed techniques. By research and repeated experiment a modern database center has been set up with its hardware and network having advanced performance, its system well configured, its data store and management complete, and its data support being fast and direct. Through study on the theory, method and model of decision an exploration decision assistant schema is designed with one decision plan of well location decision support system being evaluated and put into action. 1. Study on the establishment of Shengli exploration database center Research is made on the hardware configuration of the database center including its workstations and all connected hardware and system. The hardware of the database center is formed by connecting workstations, microcomputer workstations, disk arrays, and those equipments used for seismic processing and interpretation. Research on the data store and management includes the analysis of the contents to be managed, data flow, data standard, data QC, data backup and restore policy, optimization of database system. A reasonable data management regulation and workflow is made and the scientific exploration data management system is created. Data load is done by working out a schedule firstly and at last 200 more projects of seismic surveys has been loaded amount to 25TB. 2. Exploration work support system and its application Seismic data processing system support has the following features, automatic extraction of seismic attributes, GIS navigation, data order, extraction of any sized data cube, pseudo huge capacity disk array, standard output exchange format etc. The prestack data can be accessed by the processing system or data can be transferred to other processing system through standard exchange format. For supporting seismic interpretation system the following features exist such as auto scan and store of interpretation result, internal data quality control etc. the interpretation system is connected directly with database center to get real time support of seismic data, formation data and well data. Comprehensive geological study support is done through intranet with the ability to query or display data graphically on the navigation system under some geological constraints. Production management support system is mainly used to collect, analyze and display production data with its core technology on the controlled data collection and creation of multiple standard forms. 3. exploration decision support system design By classification of workflow and data flow of all the exploration stages and study on decision theory and method, target of each decision step, decision model and requirement, three concept models has been formed for the Shengli exploration decision support system including the exploration distribution support system, the well location support system and production management support system. the well location decision support system has passed evaluation and been put into action. 4. Technical advance Hardware and software match with high performance for the database center. By combining parallel computer system, database server, huge capacity ATL, disk array, network and firewall together to create the first exploration database center in China with reasonable configuration, high performance and able to manage the whole data sets of exploration. Huge exploration data management technology is formed where exploration data standards and management regulations are made to guarantee data quality, safety and security. Multifunction query and support system for comprehensive exploration information support. It includes support system for geological study, seismic processing and interpretation and production management. In the system a lot of new database and computer technology have been used to provide real time information support for exploration work. Finally is the design of Shengli exploration decision support system. 5. Application and benefit Data storage has reached the amount of 25TB with thousand of users in Shengli oil field to access data to improve work efficiency multiple times. The technology has also been applied by many other units of SINOPEC. Its application of providing data to a project named Exploration achievements and Evaluation of Favorable Targets in Hekou Area shortened the data preparation period from 30 days to 2 days, enriching data abundance 15 percent and getting information support from the database center perfectly. Its application to provide former processed result for a project named Pre-stack depth migration in Guxi fracture zone reduced the amount of repeated process and shortened work period of one month and improved processing precision and quality, saving capital investment of data processing of 30 million yuan. It application by providing project database automatically in project named Geological and seismic study of southern slope zone of Dongying Sag shortened data preparation time so that researchers have more time to do research, thus to improve interpretation precision and quality.

工程地质三维建模与可视化技术应用开发

Synthetic Geology Information System (SGIS) is an important constituent part of the theory of Engineering Geomechanics Mate-Synthetic (EGMS), and is the information system more suited for the collection, storage, management, analysis and processing to the information coming from engineering geology,' geological engineering and geotechnical engineering. Its contents involve various works and methods of the investigation, design, and construction in different stages of the geological engineering. Engineering geological and three-dimensional modeling and visualization is the fundamental part of the SGIS, and is a theory, method and technique by which, adopting the computer graphics and image processing techniques, the data derived from engineering geological survey and the calculated results obtained from the geomechanical numerical simulation and analysis are converted to the graphics and images displayed on the computer screen and can be processed interactively. In this paper, the significance and realizing approaches of the three-dimensional modeling and visualization for the complex geological mass in the engineering geology are discussed and the methods of taking advantage of the interpolation and fitting for the scattered and field-surveyed data to simulate the geological layers, such as the topography and earth surface, the groundwater table and the stratum boundary, are researched into. At the mean time, in mind the characteristics of the structure of the basic data for three-dimensional modeling, its visual management can be resolved into the engineering surveyed database management module, plot parameter management module and data output module and the requirement for basic data management can be fulfilled. In the paper, the establishment and development of the three-dimensional geological information system are probed tentatively, and an instance of three-dimensional visual Engineering Distribution Information System (EDIS), theConstruction Management Information System for an airport, in which the functions, such as the real-time browse among the three-dimensional virtual-reality landscapes of the airport construction from start to finish, the information query to the airport facility and the building in the housing district and the recording and playback of the animation sets for the browse and the takeoff and landing of the planes, is developed by applying the component-mode three-dimensional virtual-reality geological information system (GIS) software development kits (SDK), so the three-dimensional visual management platform is provided for the airport construction. Moreover, in the gaper, integrated with the three-dimensional topography visualization and its application in the Sichuan-Tibet Highways, the method of the digital elevation model (DEM) data collection from the topographic maps is described, and the three-dimensional visualization and the roaming about the terrain along the highway are achieved through computer language programming. Understanding to the important role played by the varied and unique topographical condition in the gestation and germination of the highly-dense, frequently-arising and severely-endangered geological hazards can be deepened.

通过语言任务和功能磁共振成像研究人类小脑功能

Since the 19th century, people have long believed that the function of cerebellum was restricted to fine motor control and modulation. In the past two decades, however, more and more studies challenged this traditional view. While the neuroanatomy of the cerebellum from cellular to system level has been well documented, the functions of this neural organ remain poorly understood. This study, including three experiments, attempted to further the understanding of cerebellar functions from different viewpoints. Experiment One used the parametric design to control motor effects. The activation in cerebellum was found to be associated with the difficulty levels of a semantic discrimination task, suggesting the involvement of the cerebellum in higher level of language functions. Moreover, activation of the right posterior cerebellum was found to co-vary with that of the frontal cortex. Experiment Two adopted the cue-go paradigm and event-related design to exclude the effects of phonological and semantic factors in a mental writing task. The results showed that bilateral anterior cerebellum and cerebral motor regions were significantly activated during the task and the hemodynamic response of the cerebellum was similar to those of the cerebral motor cortex. These results suggest that the cerebellum participates in motor imagination during orthographic output. Experiment Three investigated the learning process of a verb generation task. While both lateral and vermis cerebellum were found to be activation in the task, each was correlated a separate set of frontal regions. More importantly, activations both in the cerebellum and frontal cortex decreased with the repetition of the task. These results indicate that the cerebellum and frontal cortex is jointly engaged in some functions; each serves as a part of a single functional system. Taken these findings together, the following conclusions can be drawn: 1.The cerebellum is not only involved in functions related to speech or articulation, but also participates in the higher cognitive functions of language. 2.The cerebellum participates in various functions by supporting the corresponding regions in cerebral cortex, but not directly executes the functions as an independent module. 3.The anterior part of cerebellum is related to motor functions, whereas the posterior part is involved in cognitive functions. 4.While the motor functions rely on the engagement of both sides of the cerebellar hemispheres, the higher cognitive functions mainly depend on the right cerebellum.

Intersubband absorption energy shifts in 3-level system for asymmetric quantum well terahertz emitters

Intersubband absorption energy shifts in 3-level system stemming from depolarization and excitonlike effects are investigated. Analytically, the expressions we derive present good explanations to the conventional 2-level results and bare potential transition energy results; and numerical results show that they are more exact than the previous studies to describe the 3-level system depolarization and excitonlike shift (DES) character especially for higher carrier density (more than 8 x 10(11) cm(-2)). One interesting detail we find is that the "large blue" DES becomes "slight redshift" in the low doping limit (less than 1.9 x 10(11) cm(-2)), which may be neglected by the previous studies of intersubband transitions. Temperature character of DES in the step well structure is also numerically studied. Finally the above are applied to calculate asymmetric step quantum well structures. The two main functional aspects of terahertz (THz) emitters are discussed and several basic optimizing conditions are considered. By adjusting the well geometry parameters and material composition systematically, some optimized structures which satisfy all of the six conditions are recommended in tables. These optimizations may provide useful references to the design of 3-level-based optically pumping THz emitters.