基于Android系统的金标试条定量检测仪的研制

介绍了一种基于Android系统的手持式金标试条定量检测仪。该检测仪以手机及其自制外壳为核心硬件平台,通过手机摄像头采集试条图片,利用人机交互程序和图像处理程序,结合图像处理技术对金标试条进行定量检测。实验结果表明:该仪器对金标试条进行定量检测具有可行性。     

超声辐射下酸性离子液体催化合成1,1-二乙酸酯

室温无溶剂超声辐射下,以功能化酸性离子液体[C3SO3Hnhm][HSO4]为催化剂、芳香醛和乙酸酐为原料合成1,1-二乙酸酯。通过单因素试验优化了反应条件,研究了该离子液体的重复使用性能及催化剂的底物适用性。结果表明,当苯甲醛与乙酸酐的摩尔比为1∶2.3,20℃超声辐射反应15 min,催化剂用量为苯甲醛物质的量的1%时,收率可达96%以上;[C3SO3Hnhm][HSO4]重复使用5次,其催化活性下降不明显;将[C3SO3Hnhm][HSO4]用于其他芳香醛的催化,收率为84%~98%。     

Mo-ZrO_2金属陶瓷耐蚀性能与组成的关系

用金属Mo粉和ZrO2粉,在1600℃下烧结制备了Mo摩尔百分数分别为60%、50%和40%的3种Mo-ZrO2金属陶瓷试样.在Ar保护气氛下,分别用1550℃的IF钢和CaO-Al2O3-MgO预熔渣将3种试样侵蚀2h.用SEM分别比较了试样在钢液和熔渣侵蚀后断口形貌的变化,用EDS分析了钢液侵蚀后试样的边缘处、距边缘0.25,0.5和1mm处的元素组成.结果表明,Mo含量为40%的试样耐钢液侵蚀能力最强,随着Mo含量的增多,金属陶瓷耐钢液侵蚀性能逐渐减弱;Mo含量为60%的试样耐熔渣侵蚀性能较好,随着Mo含量的减少,金属陶瓷耐熔渣侵蚀性能逐渐减弱.     

Algebraic method for the design of output deadbeat controller

Based on the deadbeat model approach and the technique of output spectra matching, an algebraic method for the design of an approximate deadbeat controller with a specified configuration has been proposed. The chosen controller is determined by solving a set of simultaneous algebraic equations. One example is given to show the characteristic features of this approach.     

《住宅建设通用规程》颁布实施的思考

近年来，住宅工程质量一直是群众投诉的热点之一，而住宅裂缝和渗漏等通病带给业主的是烦恼、气愤和无奈：带给开发商的是诚信和形象的贬值：带给施工单位的是维修和损失；带给政府的是无尽的的投诉、上访甚至“闹事”、一个看似简单的问题不仅影响了开发商和建筑行业的健康发展，更影响了社会的诚信与和谐．     

Application of shifted Chebyshev series to the optimal control of linear distributed-parameter systems

By use of a particular property of the shifted Chebyshev series, the optimal control of a distributed-parameter system is simplified into the optimal control of a linear time-invariant lumped-parameter system. Next, a directly computational formulation for evaluating the optimal control and trajectory of a linear distributed-parameter system is developed. The formulation is straightforward, and convenient for digital computation. An illustrative example is given to demonstrate the applicability of the proposed method     

无损检测机器人可逆直流驱动控制研究

针对核反应堆无损检测机器人主立柱驱动需求,研发一款4kW逻辑无环流可逆直流驱动器,提出一种设计DLC（无环流逻辑控制器）的新方法,采用分段PID控制算法解决系统非线性问题,并对驱动器EMC性能进行测试。应用结果表明,DLC工作稳定可靠,驱动器调速性能良好,EMI低,不影响系统中超声传感器的正常工作。     

天然气再燃技术在电厂锅炉的应用

介绍了天然气再燃低NOx技术的原理与特点．研究分析了天然气再燃效果的影响因素：包括天然气投入的比例、空气的化学当量比、再燃区的温度、烟气在再燃区的停留时间等．提出了天然气再燃气技术应用于电厂锅炉设计与改造时必须考虑的各种因素和需要解决的问题．     

基于改进型FFT算法的逆变器波形控制技术

介绍了一种基于改进型FFT算法的逆变器波形控制技术,分析了系统的工作原理,详细探讨了控制系统的参数设计方法,并得出了试验结果。     

Analysis and identification of non-linear systems via shifted Jacobi series

Based on shifted Jacobi series, algorithms have been established for the analysis and identification of non-linear systems described by a Hammerstein model consisting of a single-valued non-linearity followed by a linear plant. Moreover, the parameter estimation of a certain non-linear lumped system is also presented. By using the shifted Jacobi expansion for the analysis, the solution of a non-linear state equation is reduced to the solution of a linear algebraic matrix equation. For the identification, by expanding the measured input-output data into the shifted Jacobi series the unknown parameters of the non-linear system are estimated through the least-squares method. Examples are given to demonstrate the usefulness of this approach.