基于Zigbee技术足球跑位监控系统

为实现对足球场上运动员跑位的系统训练, 需要电子技术的帮助。在研究前人实验结果基础上, 提出了一种基于Zigbee技术的足球跑位监控系统, 能达到设备的高实时性、 高定位精度以及方便组网等要求。通过在实验室模拟环境下的数据测试, 结果达到了预期目标。     

EBZ255掘进机故障诊断及维护

针对EBZ255型掘进机结构特点,分析了EBZ255型掘进机液压系统、润滑系统存在的问题,给出了改进方案和措施,设计了电缆跑位装置,防止电缆被挤压,提高了掘进机工作效率。     

浅谈足球无球进攻队员的跑动

在攻防这对矛盾中,要破坏对方攻守平衡,取得本方进攻的优势,有意识的进攻性跑位是足球比赛中重要的进攻手段之一。积极有效的跑位是全队保持进攻体系的重要方式,有意识的跑位是构成进攻战术的重要环节之一。在进攻中,多位无球队员的主动跑位,首先可以创造更多的进攻点,从而形成进攻的立体层次,为进攻的发起人提供更多的选择面,其次为进攻赢得处于主动地位的时间与空间。     

普通高校足球专选生在进攻性无球跑位战术教学中的现状

在普通高校足球专选生的教学中,进攻性无球跑位的战术教学是重要内容之一,本文对教学的现状进行了分析,提出培养学生的进攻性无球跑位战术意识,挖掘其创造性思维的潜在能力,有利于让学生真正进入一个用脑踢球的状态,使之在教学与训练中获得智慧的“结晶”和最宝贵的“运动精髓”,从而促使足球专选课的教学水平得以提高。     

Robocup中截球模块的设计

RoboCup是一个标准问题,通过它可以来评价各种理论、算法和框架等.在RoboCup仿真组的比赛中,截球动作做为防守的基础,具有非常重要的地位和作用.本文通过将跑位和截球动作结合,设计出较为有效的截球模块.     

广州市业余基层足球联赛裁判员执法问题分析

足球裁判员在执法基层业余足球比赛的过程中,应根据参赛运动员自身比赛的特点,裁判员采用机动灵活的跑位,提高合理地运用竞赛规则能力.在执法配合上要求裁判员随时进行多种途径交流,灵活的运用规则掌握判罚尺度,对有异议的判罚做出简短的规则解释,以促进广州市业余基层足球联赛的健康发展.     

气雾化法制备非球形铜基钎料的研究

通过在钎料基体中添加合金元素、控制雾化气体压力与合金液过热度等方法制各了非球形铜基钎料:大面积平板复合钎焊时,如果钎料粉末颗粒形状为球形,则会由于球形钎料易于滚动导致焊件跑位,增加了工件焊前装配难度.采用非球形粉末钎料于大面积平板复合钎焊,简化了焊前工件装配工序,且焊接效果优于球形铜基钎料.     

嵌入式人脸检测系统平台设计与实现

描述了基于S3C2410的人脸检测系统的平台设计及实现过程,主要包括人脸检测系统的硬件架构搭建及软件平台设计实现.将Adaboost人脸检测算法在该硬件环境上的运行,得到了较好的效果.该系统为嵌入式系统的开发提供了一个范例,达到了系统体积小,成本低,速度快、可靠性高的目的.     

SQCF一类混沌系统的高增益观测器同步方法

针对SQCF(simplest quadratic chaotic flow)模型类的不确定混沌性系统,基于高增益观测器的方法,讨论了混沌同步设计方法.通过在观测器中加入滑模项来抑制未知干扰的影响,以此设计了一个鲁棒高增益观测器.高增益的选取基于一代数Riccati方程的解,为此讨论了Riccati方程解的存在性.设计滑模增益,使系统达到并保持在滑模面上.基于坐标变换和Lyapunov稳定性理论,证明了同步的收敛性.针对一个SQCF混沌系统进行了仿真设计,仿真结果表明了该方法的有效性.     

多媒体技术在篮球教学中的应用

多媒体技术处理的信息可以呈现出多样化和多维化,使讲授内容不再局限于单调狭小的范围,有更加充分自由的空间,使那些抽象难懂,用语言不易表达的内容变得生动具体一目了然.对一些连续复杂的技术动作和战术跑位还可以利用多媒体计算机虚拟技术在屏幕上进行分解或组合,再加以图标、亮点予以重点显示,以利于学生理解吸收.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

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…     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

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。     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

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

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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     

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