供水管道泄漏信号检测系统设计

针对供水管道泄漏信号检测与泄漏点定位问题,设计了一种基于压电加速度传感器的供水管道泄漏信号检测系统。检测系统由两个振动信号采集终端和基于Matlab的上位机软件组成。从泄漏信号特点出发,对振动信号采集终端的前置信号转换电路、带通滤波电路和ADC数据采集电路进行了分析和设计。同时,对单片机程序和上位机软件的设计原理和功能进行了分析说明。采用VC-02振动校准仪和模拟供水管网,对系统的微弱振动信号采集功能和泄漏点定位功能进行了测试。测试结果表明,系统能准确采集加速度不低于0.01g（1g=9.80m/s^2）的微弱振动信号,对10m长的UPVC管道进行泄漏点定位的最大相对误差为3.97%,平均相对误差为3.51%。     

含有一维p-Laplacian算子的非线性两点边值问题的可解性

考察了含有一维p-Laplacian算子的非线性两点边值问题：{（φp（u＇（t）））＇＋f（t,u（t）,u＇（t））=0,0≤t≤1 u＇（0）=A,u（1）=B的可解性。通过应用Schauder不动点定理,得到了这类方程的解的几个存在性定理。主要结果表明：如果非线性项在其定义域的某个有界子集上的“高度”是适当的,那么该问题必存在解或正解。     

国家体育馆屋盖滑移支撑转换变形分析

国家体育馆在滑移施工过程中一个非常关键的步骤是七点支撑转变为三点支撑,文章给出两种转换方案,分析此过程中结构的位移、支撑架反力、杆件应力的变化情况。     

非间断软件回归测试模型研究

软件测试是开发过程的重要环节。回归错误在开发过程中严重影响着开发的效率,其隐匿特性也使得测试比较困难。因此,本文提出一种非间断测试的模型,用于加强对回归错误的管理,节约不必要的无谓工作时间,提高软件开发的效率。这种模型对用户开发行为进行模拟和推测,在经过大量的数据训练后,寻找测试行为、错误发生等开发动作的捕获点,从而找到最佳的测试策略。在不影响开发人员工作的前提下,可对当前最新的代码进行测试,最大程度上避免回归错误长期隐藏在前期代码中,保持整个开发过程的稳步前进。     

秸秆灰特性的研究

按照D1102-84灰分标准测定方法,对小麦、水稻、玉米、黄豆、高粱、棉花等几种秸秆样本进行了工业分析;在ZRC2000智能灰熔点测定仪上对不同秸秆进行了灰熔点测试;在不同的温度和停留时间下,在马弗炉上对不同秸秆进行了热灼烧试验.结果表明:秸秆挥发分含量较高,灰熔点比较低,无机碱金属析出量随着温度的升高和停留时间的增加而增加.     

AU-aware Algorithm for 3D Facial Reconstruction

As a critical task in computer vision and animation, 3D face reconstruction can provide 3D model structures and rich semantic information for multi-modal facial applications. However, monocular 2D facial images lack depth information and the parameters of the predicted facial model are not reliable, which causes poor reconstruction results. We propose to employ facial Action Unit (AU) and key facial points which are highly correlated with model parameters as a bridge to guide the regression of model-related parameters and thus solve the ill-posed monocular face reconstruction. Based on existing face reconstruction datasets, we provide a complete semi-automatic labeling scheme for facial AUs and construct a 300W-LP-AU dataset. Furthermore, a 3D face reconstruction algorithm based on AU awareness is put forward to realize end-to-end multi-tasking learning and reduce the overall training difficulty. Experimental results show that the algorithm can improve the face reconstruction performance, with high fidelity of the rebuilt facial model.     

宋祖英海外独唱音乐会的文化策划探讨

文章对宋祖英两场海外独唱音乐会的成功举办,从定位、卖点、后续市场等几方面进行了分析,进而对其把握文化策划的原则和要点进行了探讨,力求为“2006—2008海外中国年”的成功举办提供借鉴。     

地震勘探中断层解释与断点组合方法的讨论

分析了当前地震勘探断层解释中存在的问题,指出断层解释中必须将定量因素的量值标注清楚、准确,同时要参考指导因素,对断层进行合理解释和断点平面上的合理组合。总结了地震勘探断层解释的基本原则,并对断层解释提出了几点建议。     

室内设计与产品设计的整合

室内设计与产品设计是相关于人的设计的两个不同的领域。室内设计不仅是对空间、界面等人与环境的关系问题的把握与设计,也是对室内产品的设计与布置;而产品设计不仅要考虑人,还要考虑到与人所在环境的协调一致性。室内设计与产品设计互为补充,共同发展。在我国,健全市场机制、调整企业经营模式以及改革设计教学模式是促进室内设计与产品设计融合发展的有效途径。     

Detonation propagation in narrow gaps with various configurations

In general all detonation waves have cellular structure formed by the trajectory of the triple points.This paperaims to investigate experimentally the propagation of detonation in narrow gaps for hydrogen-oxygen-argonmixtures in terms of various gap heights and gap widths.The gap of total length 1500 mm was constructed bythree pair of stainless plates,each of them was 500 mm in length,which were inserted in a detonation tube.Thegap heights were varied from 1.2 mm to 3.0 mm while the gap widths were varied from 10 mm to 40 mm.Variousargon dilution rates were tested in the present experiments to change the size of cellular structure.Attempts havebeen made by means of reaction front velocity,shock front velocity,and smoked foil to record variations of cel-lular structure inside the gaps.A combination probe composed of a pressure and an ion probe detected the arrivalof the shock and the reaction front individually at one measurement point.Experimental results show that thenumber of the triple points contained in detonation front decreases with decrease in the gap heights and gapwidths,which lead to larger cellular structures.For mixtures with low detonability,cell size is affected by a cer-tain gap width although conversely cell size is almost independent of gap width.From the present result it wasfound that detonation propagation inside the gaps is strongly governed by the gap height and effects of gap widthis dependent on detonability of mixtures.