基于FPGA的宽幅单PASS多喷头驱动研究

针对多PASS印刷模式输出速度低和当前单PASS模式成本高的缺点,系统采用由多个小型喷头组成喷头阵列 构成单PASS印刷模式,该方法不仅可以避免多PASS模式与当前单PASS模式的缺点,而且更加灵活。利用FPGA高 速、灵活的优势实现了对大量印刷数据的缓存与异步读写操作,在FPCA内部实现了多喷头的并行驱动。实验结果表 明,该系统可以实现高速、持续地宽幅面印刷输出,证明了设计的可行性与正确性。     

精密谐波传动系统的动态模型研究(英文)

提出了精密控制系统中谐波齿轮传动的新的数学模型,该模型综合研究了摩擦和传动挠性的影响。模型用函数描绘了谐波传动的特性,分析了谐波传动中电机一侧和载荷一侧的摩擦力,将复杂的非线性摩擦力表述为位置和速度的函数,摩擦力中的平均摩擦用二次函数表示,周期性变化的部分用傅里叶级数描述,试验数据和仿真结果的一致性证明了该模型的有效性。     

案例式项目驱动的《电子技术基础》教学方法探析简

《电子技术基础》课程涉及的理论范围广,实践性较强,知识更新快,传统教学方法无法适应课程的特点。提出了项目驱动结合案例式教学方法,将企业化的项目驱动方法引入课堂,培养学生的综合能力和实践动手能力。同时在理论教学中结合案例式教学方法,激发学生兴趣,启发学生主动思考,缩短理论与实践的距离。     

文学创作内驱力概念辨析

文学创作内驱力是一个极为复杂而又众说纷纭的概念范畴,从其内涵、本质、特征、历时性、内在结构等方面看,文学创作内驱力是一个多层次、多维度的纵横交错的有机系统,是人所独具的一种激发、推动和维持主体从事文学创作的内在驱策力,一种富有创造性的、生生不息的内在生命力。     

ASP三元复合体系宏观流变特征研究

利用HAAKE RV-100旋转流变仪和TR-1加压式毛管粘度计,在10^-1s^-1~10⁴s^-1的剪切速率范围内,测定了不同配方的三元复合体系的流变特性。流变数据处理结果认为,三元复合体系流变性可用Carreau模型来描述。研究结果显示,在所研究的条件下(碱浓度0.5%~1.5%、聚合物浓度800 mg/L~1200 mg/L、表面活性剂浓度800~1200 mg/L),三元复合体系表现出类似于聚合物溶液的流变特征,在低剪切速率和高剪切速率下,体系表现出牛顿流体特征;在中等剪切速率下,呈现剪切变稀的流变特性。随着碱、表面活性剂浓度的增加,三元复合体系的零剪切粘度下降,剪切变稀性能减弱。     

"液压传动"课程教学探讨

"液压传动"课程是机械制造专业的一门重要专业基础课,既有较深的理论性,又有很强的实践性。文章分析了该课程的特点,对教学方法、实践教学的改革进行了探索与实践,总结出多种教学方法,这些方法有助于提高教学质量,推动现代课堂教学改革。     

房地产企业参建保障房的利益驱动和主要风险

我国保障房建设任务非常繁重,在房地产调控趋于严厉、保障房建设力度显著加大的双重背景下,房地产企业参建保障房,尤其是廉租房和公租房,由于目前并没有形成成熟的盈利模式,很难形成强烈的直接利益驱动。但其间接利益却是多元的。房企参建保障房,还存在诸多不确定性,企业难以进行有效把握和控制。研究认为,有实力的开发企业可以适度参与保障房（经济适用房和限价房）建设。在这一过程中,尤其要注意与政府的协调公关以及开发进度和成本控制。     

简论金代契丹族二税户及驱奴

本文对金代契丹族二税户和驱奴的变化、地位以及生活状况做进一步探讨和分析,认为金代契丹二税户和驱奴尽管有很多被放良,但是依然大量存在,他们的地位还很低下,从事繁重的劳役。     

Thirty Points About Motivation From Skinner’s Book Verbal Behavior

Skinner discussed the topic of motivation in every chapter of the book Verbal Behavior (1957), usually with his preferred terminology of “deprivation, satiation, and aversive stimulation.” In the current paper, direct quotations are used to systematically take the reader through 30 separate points made by Skinner in Verbal Behavior that collectively provide a comprehensive analysis of his position regarding the role of motivation in behavior analysis. In addition, various refinements and extensions of Skinner''s analysis by Jack Michael and colleagues (Laraway, Snycerski, Michael, & Poling, 2003; Michael, 1982, 1988, 1993, 2000, 2004, 2007) are incorporated, along with suggestions for research and applications for several of the points.     

Planning a cost-effective cellular manufacturing process—a case study

The drive key is one of the most important high-precision components of aircraft braking systems. In this paper, a cost-effective drive key manufacturing process is developed. This proposed manufacturing process makes use of near net shape manufacturing, CNC machining, and cellular manufacturing methods. To make the proposed process a reality, proper engineering changes of the parts along with group technology are applied to the product design, in conjunction with the pro posed manufacturing methods. In addition, a general spread sheet program is developed for each style of fixture module to assist in part program coding. Moreover, statistical process control (SPC) is implemented to verify product quality and accept the product at the point of manufacture. It is observed that the implementation of the proposed drive key cellular manufacturing process results in a tremendous improvement in quality, throughput and productivity as well as a drastic reduction in manufacturing operations, workholding fixtures, cutting tools, and inspection media.