摘要：This paper presents a small-sized and practical-use-oriented CAD Drawing System, which is developed by using the designing thoughts and technology of OOP and C++ Language. The System has found its successful applications in the teaching system and the monitoring and controlling system

摘要：Texture pattern mapping is one of the most important techniques for high quality image syn- thesis. It can largely enhance the visual richness of raster-scan images. In this paper is presented a new method of mapping planar texture pattern onto beta-spline curved surfaces——bilinear mapping method which can map planar texture pattern onto curved surfaces with less distortion, and also can fulfill the geometric transformation of the texture pattern on the curved surfaces by operating the pattern win- dow. It is valuable to both CAD/CAM in artistic field and computer graphics.

摘要：The principle of the fire alarm system and the implementation techniques of its computer graphic display are presented. With the help of the designing thoughts and technology of OOP, a Fire Alarm System (FAS) has been developed by using visual C++ language. The system has been put into use in many important buildings and has played an important role in monitoring and controlling the fire.

摘要：为解决设计过程中,三位四通方向阀设计周期长、加工成本高等问题,提出一种基于SimulationX和Simulink的仿真测试平台。在SimulationX中搭建三位四通阀的仿真模型,将模型导入到Simulink中进行仿真,根据仿真数据自动绘制出三位四通方向阀在时域和频域的特性曲线,最后将仿真曲线与实验所得曲线进行了对比。结果表明:该平台能较好地模拟阀的真实工作特性,对设计和生产具有指导意义。

摘要：In this paper a new method of texture pattern mapping onto free-form surfaces with less distortion and higher suitability is *** named CF Mapping Method is based on the Ap- proximate Development Principle and Equidistance Correspondence *** is adaptable to various kinds of free-form surfaces with slight ***,by operating the pattern window ,dif- ferent artistic treatments——translation,rotation,reflection,sealing,*** be ***- edly,it is very practical in the CAD/CAm of artistic scope.

摘要：This paper considers the construction of a rational cubic B-spline curve that willinterpolate a sequence of data points x'+ith specified tangent directions at those points. It is emphasisedthat the constraints are purely geometrical and that the pararnetric tangent magnitudes are notassigned as in many' curl'e manipulation methods. The knot vector is fixed and the unknowns are thecontrol points and x'eightsf in this respect the technique is fundamentally different from otherswhere knot insertion is ***. the theoretical result3 for the uniform rational cubic B-spline are presented. Then. in theplanar case. the effect of changes to the tangent at a single point and the acceptable bounds for thechange are established so that all the weights and tangent magnitUdes remain positive. Finally, aninteractive procedure for controlling the shape of a planar rational cubic B-spline curve is presented.

摘要：目的建立多重PCR和纳米孔测序相结合的检测方法,为实现消化道病原体现场高灵敏度快速检测奠定基础。方法通过设计消化道病原体特异性引物,验证引物特异性,优化多重PCR扩增条件,构建快速建库测序体系,对病原体的检测灵敏度进行评价。结果建立的12种消化道病原体多重PCR检测体系可以对所有靶序列进行有效扩增。经测序检测,当引物池中每条引物浓度为0.1μmol/L时,12种病原体混合DNA模板和3种轮状病毒A、B、C的混合RNA样品检测灵敏度均可达到103拷贝/ml。结论该方法可在短时间内完成消化道病原体的鉴定,提升突发公共卫生事件中现场病原体检测效率,有望在疫情防控中发挥重要作用。

摘要：目的通过对多重PCR扩增条件的优化和纳米孔测序中病原微生物检测特异性及灵敏度的评价,建立一种由多重PCR和纳米孔测序技术相结合的检测技术体系,满足对呼吸道病毒现场快速检测鉴定的需求。方法首先针对呼吸道病毒设计特异性引物,其次优化PCR扩增条件,建立快速测序体系,最后对不同浓度的病原体进行扩增与测序鉴定,评价检测体系的灵敏度。结果优化后的多重PCR检测体系在退火温度为55℃、引物添加浓度为0.1µmol/L时,可同时检出25种呼吸道病毒,检测灵敏度可达1×104拷贝/ml,整体检测时间在4 h以内。结论该方法简单快捷,能够实时获取扩增片段的序列信息,特异性强,灵敏度较高,有望为呼吸道病原体的快速筛选和现场检测鉴定提供有力技术支撑。