Research and implementation on WNXD database storage strategy

For the drawbacks of NativeXML, such as low data storage performance, low efficiency of querying and updating, a new kind of semi-structured information storage model, named WNXD, is proposed. The dynamic invert-sorting technique and data imaging mechanism are introduced to combine the record and the page storage mode, three structured indexes are established to achieve structural and dynamic growth with different ways. A practical storage mode is created to provide a comprehensive access strategy from global to local, and from elements, attributes to values, which guarantees effective and complete data storage, especially for the data with different types. The query number decreases I/O and the system performace is improved.     

潍坊地区一次强冰雹天气成因分析

为了避免冰雹灾害给社会造成不必要的损失,达到防灾减灾的目的,更好地做好冰雹天气预报,笔者利用常规观测资料、雷达和FY-2E卫星TBB资料,对2012年6月初潍坊市出现的一次典型冰雹天气过程进行了成因分析。结果表明：此次冰雹天气过程发生在东北冷涡和前倾槽的环流背景下,强烈的上升运动为此次天气提供了动力条件,地面中小尺度辐合线是此次冰雹天气的触发机制。适宜的0℃层和-20℃层高度及大的环境风垂直切变有利于雹粒的增长。另外,此次天气发生在对流云团发展最旺盛的时段,位置位于大于232 K的冷云盖移动方向的前端到等温线梯度大值区附近,这对冰雹天气落区的预报有较好的指示意义。     

Application of BP Neural Networks in Inventory Dynamic Modeling

The authors establish an original inventory model based on BP neural networks in dynamic environment using the inventory history data, and overcome the net overfitting problem occurred with insufficient samples by using early stopping method. After a simple-relation inventory model training is attained, they get inventory model and analyze it dynamically by reconstructing the model after getting new sample data. An example is provided to illustrate the model. The theoretical evidence is provided for the inventory system to make management decision.     

And/or Dag Method in Dynamic Design and Maintenance of Data Warehouse

A data warehouse (DW) is taken as a set of materialized views defined over base relations. It is dynamic entity that evolves continually over time .As time passes, new queries can be made into new views to be added to the DW. Data Warehouse is expressed as and/or dag can describe the relations between queries in DW preferably. Thus, the design of DW can simulate the problem of state space search, relevant exchange rule may define state exchange rule. It can achieve the dynamic design of DW by exchanging and predigesting of state space search. A dynamic design way is proposed to add the new views to the DW by an example.     

海上大风延伸期预报研究进展

海上大风是海洋产业的重大灾害性天气,而延伸期预报是世界性难题。目前,延伸期预报主要分成动力延伸、低频振荡、经验波传播、数理统计、气候扰动分解和集合预报等6种方法,以动力延伸中的数值模式和低频振荡中的MJO监测诊断最为流行。随着大数据时代的到来,基于大数据分析,以数值预报产品为基础的集合预报成为未来业务发展的重点方向。这6种方法都可以用于海上大风等重大灾害性天气预报,许多学者尝试较多的是气候扰动分解、低频振荡中的低频天气图等方法中的溯源技术,通过找到源头,实现重大灾害性天气的延伸期预报。     

广东省增城市农业资源数据服务系统构建

随着国家农业信息化建设的进行,农民对农业信息资源的需求持续增加,迫切需要发展“一站式”的农业服务系统。以广东省增城市为研究区,基于Web GIS 技术和B/S 结构构建了面向农民生产全过程的农业资源数据综合服务系统。系统可实现对气象、土壤、水资源、农情、农业服务机构等多种信息的展示、查询与分析。该系统的构建为相关系统的开发提供了一种思路。     

CLDAS数据在早稻低温冷害监测中的应用

本研究旨在实现水稻低温灾害的实时动态监测,改善目前遥感数据在南方地区应用受云雨天气影响受限的现状。利用CLDAS气温数据,结合遥感水稻种植本底信息,参考低温冷害监测指标,选取广西典型早稻低温冷害过程进行监测试验。试验结果表明：利用CLDAS气温分量数据可对区域气温变化状况进行有效的动态监测,结合水稻种植空间分布信息,可实现精细化的水稻受灾面积及等级监测。CLDAS反演的气温精度较高,与气象台站实测气温误差多小于0.5℃。CLDAS和遥感数据结合可为水稻精细化低温冷害监测提供一种新的有效途径。     

Dynamic Data Exchange for Collaborative Design Based on Internet

The dynamic data exchange is the key to the realization of the collaborative design based on Internet. The features of data for collaborative design based on Internet are analyzed. The data transformation, the data transmission and the data transaction of collaborative design based on Internet are researched. The system configuration and organization mode of dynamic data exchange for collaborative design Internet-based are developed, in which, STEP serves as the product data exchange standard, and ORACLE is the kernel database of the system, so that each of the CAD systems can synchronously access the ORACLE database, share and exchange the design information. The STEP-ORACLE serves as the organizing mode of dynamic data exchange for the collaborative design based on Internet, which realizes the real-time exchange and consistency of the dynamic data between the different platforms and CAD systems.     

Applications of the integrated system for the section measure in the mountain highways

Based on road design information, we derived coordinates of arbitrary points in the pile and cross sectional azimuth which may guide global positioning system (GPS) surveying in section surveys. Also, we introduced Windows CE technology into the measurement process, using embedded programming for the GPS real time data process. It emphasizes designing the functional components of GPS data communications, data displays and cross sectional surveys. The software system may be used to produce the liberal station, real time dynamic display, and indoor and outdoor work processing. This system has been used in the Shanghai Chengdu West Road Item. The results show that the integrated system of indoor and outdoor works for real time kinematic (RTK) surveying in a mountain highway could simultaneously process indoor surveys and outdoor data.     

Dynamic data exchange based on STEP-OODB for network-supported collaborative design

This paper analyzes the features of data for network-supported collaborative design, researches the data transformation, the data transmission and the data transaction of collaborative design. The system configuration and organization mode of dynamic data exchange for network-supported collaborative design are developed, in which, STEP serves as the product data exchange standard, what's more, Object-Oriented Database (OODB) is the kernel database of the system, so that each of the CAD systems can synchronously access the OODB, share and exchange the design information. The STEP-OODB serves as the organizing mode of dynamic data exchange for the network-supported collaborative design based on Internet, which realizes the real-time exchange and consistency of the dynamic data among the cross-platforms and CAD systems.     

Stress wave effect in numerical simulation on rock breaking under high pressure water jet

The evolvement of rock damage struck by a high pressure water jet is characterized by nonlinear properties, thus making it a complicated dynamic problem. Based on a nonlinear finite element and elastic plasticity theory, a computational model was established. The dynamic load striking the rock by a high pressure water jet was simulated by the dynamic contact method. Furthermore, the propagation of a stress wave in the same rock was simulated at different impact velocities. The results show that the propagation velocity of a stress wave is proportional to the impact velocity of the high pressure water jet. The effects of a stress wave in sandstone and coal impacted by high pressure water jets of the same velocity were simulated.The effect of a stress wave in coal was stronger than in sandstone, while the region of propagation of stress wave in coal was smaller.     

Seismic Responses of Cylindrical Reticulated Mega-structure under Traveling Wave Excitations

Considering the significant influence of spatial correlation in long-span spatial structures, seismic response analyses of traveling wave excitations in cylindrical reticulated mega-structure were conducted under one-dimensional and multidimensional severe earthquake by using dynamic time-history method. Elastoplastic displacement and stress, stress range, distribution and development of yield members of the structure under traveling wave excitations were researched via inputting horizontal transverse wave and longitudinal wave separately firstly. Then traveling wave effects of the structure were studied under different dimensional earthquake inputting and different spans. It is shown that the response effects under traveling wave excitations differ from that under simple support excitations and the diversity changes under different earthquake inputting and different span, which proves that the effect of traveling wave excitations should be taken into account under different earthquake inputting in long-span spatial structures.     

运用噬菌体随机七肽库筛选与CRN特异结合的多肽

CORYNE（CRN）对拟南芥(Arabidopsis thaliana)茎尖分生组织干细胞的分裂分化的调控具有重要作用。为了研究与CRN胞内激酶区相互作用的肽,探讨与CRN胞内激酶区相互作用的关键位点,本实验采用了亲和淘选噬菌体随机七肽库的方法。通过四轮亲和淘选后随机挑取10个克隆进行DNA测序,经ELISA鉴定后,得到1个与CRN胞内激酶区特异结合的七肽,其序列为TLTELVR。研究结果表明,利用噬菌体展示技术成功淘选到了与CRN胞内激酶区特异结合的七肽,为进一步研究与CRN胞内激酶区相互作用的分子奠定了基础。     

A fault data recording system design for hybrid electric vehicles

A data recording system for fault diagnosis of hybrid electric vehicles was studied by taking the integrated starter and generator (ISG) hybrid electric vehicle as the investigation object. The fault diagnosis communication net was established using a CAN bus and a K line. As designed, the system hardware structure included a CPU processing module, a communication module, and a USB recording module. With the system requirements and characteristics in mind, special circuit design and analysis of USB mass storage module were carried out based on the hardware scheme and software design. In the running test, the fault data recording system worked stably, and the data was recorded integrally and correctly. At the same time, the online display data accurately reflected the vehicle's running status.     

渔业生产大数据助推渔业高质量发展建设研究

渔业生产大数据是在养殖、捕捞、加工、流通、管理等活动中产生的原始性数据,对提升渔业科技创新能力、推动渔业转型升级、促进渔业绿色高质量发展具有重要的引导作用和使用价值。本研究以中国渔业高质量发展为根本出发点,分析渔业生产大数据中心的特点与应用需求,提出涵盖数据采集、传输、存储、应用全链条的渔业生产大数据中心体系架构,围绕渔业生产大数据采集监测网、资源调度分中心和数据主中心制定渔业生产大数据中心建设的总体方案,并基于大数据应用视角,明确渔业生产大数据中心建设的总体目标、标准体系、规划布局与实施路径。研究表明,建设由水产养殖监测网、海洋捕捞监测网、加工流通监测网、水产养殖分中心、海洋捕捞分中心、加工流通分中心、市场监测分中心、管理服务分中心及渔业生产大数据主中心构成的分布式工程体系,形成渔业生产过程动态监测与态势感知能力,对提升我国渔业生产与管理水平、加快数据融合应用、实现渔业创新高质量发展具有重要意义,可为进一步具体开展渔业生产大数据中心建设提供设计蓝图。     

Analysis of Seismic Dynamic Responses of Tunnel throughFault Zone in High Earthquake Intensity Area

Based on dynamic time history analysis, dynamic response behavior of an un supported tunnel through fault zone which was simulated by interface and solid elements was studied under uniform input earthquake wave excitation. The analyses of response behaviors, including displacement difference, acceleration magnification, and plastic zones and so on, were carried out when earthquake wave excitation was input along transverse, longitudinal and vertical of tunnel respectively. The results show that simulation method for fault zone is effective; the earthquake causes obvious displacement difference at fault zone and surrounding rock contacting part. The maximal displacement difference reaches to 51.8mm under transverse uniform input earthquake wave excitation. And the displacement difference under vertical and longitudinal is only 44.3% and 23.1% of the transverse value, respectively; the acceleration magnification in fault zone is significantly greater than that in surrounding rock. Shear failure zone appears at the fault zone and surrounding rock contacting part, and it is especially prominent under input longitudinal earthquake wave excitation. It is proposed that fault zone has significantly influence on the dynamic performance of tunnel. The fault zone and the transitional zones are the control zones of seismic design when tunnel passes through fault zone, thus, the study on the anti seismic measures should be further strengthened.     

农田蒸散量模型构建及蒸散状况分析

笔者以辽宁省为例,利用1981~2002年间18个代表站点常规气象资料与土壤湿度观测资料,建立了不同供水条件下农田蒸散量的模拟模型,计算了自然条件下的农田蒸散量的变化。结果表明,辽宁省农田蒸散量年内呈单峰形变化,峰值出现在玉米抽雄开花期。农田蒸散量区域分布中间高四周低,趋势与自然降水分布不一致。农田蒸散量年际间呈波动性变化,多水年农田蒸散量明显高于正常年,90年代辽宁中部、辽东、辽南、辽北地区农田蒸散量呈逐年上升趋势,辽西地区农田蒸散量呈逐年下降趋势。     

Angular Acceleration Measurement System and Its USB Data Acquisition

The angular acceleration of a rotary shaft is one of the most important parameters for revolution which is widely employed in practical applications. The principles and approaches for measuring angular mechanism, acceleration were studied to find a feasible way to obtain the accurate and successive value of angular acceleration. A new type of data acquisition device with USB module was developed based on microcontroller AT09S8515 and USB interface controlling IC PDIUSBD12. It was convenient to test the width of rotary speed signal by using the unique function of the microcon-troller for automatically capturing the rising or falling edge of a square wave.     

Analysis of Failure Behaviors in Glass under Shock Loading

The failure wave phenomena in glass media under shock loading are analyzed. The propagating mechanism and dynamic characteristics of failure wave and the property of failure layer are revealed. On the basis of experimental analysis, a damage accumulating model determinated by partial stress impulse is proposed, which describes the phenomenon of failure delay in materials being done with the Heaviside function. The propagating procedure, the evolution characters of transverse stress and longitudinal compression strain in failure layer are simulated. Furthermore a phenomenon is revealed that the failure wave velocity decreases after reflection of rarefaction wave at the boundary of failure layer.