股权制衡使公司内部控制更有效吗？——基于通信设备制造业上市公司案例的思考

早前内部控制的研究主要集中于概念框架、影响因素及公司治理失效案例方面,缺乏重点考察股权制衡这一因素对内部控制的作用机理。股权结构是公司治理的基础,不同的股权结构决定了不同的企业治理结构,最终决定了企业内部控制的有效性。相对股权分散和一股独大的股权结构,股权制衡可优化公司内部控制。     

蓄电池生产线极板上料装置

针对蓄电池生产线包封工序中存在大量手工上料,铅粉危害操作人健康,提出了极板自动上料的方案,分析比较 各方案的优缺点,设计了极板上料装置。极板上料装置投入运用后,解决了极板包片机上料的瓶颈,降低了工人劳动强 度,提高了劳动生产率     

定长米粉切割装置

针对米粉在加工过程中出现切割面不平整、切削效率低、工作强度大等问题设计了一种定长米粉切割装置。该 装置动力元件选择交流电机,传动元件选用具有吸振与缓振功能的V型带轮传动,执行元件设计为一种四齿间歇性运动 圆盘结构,辅助元件为长方形机架与米粉进给装置,并对整机结构进行三维机构运动学仿真,结果表明所设计的定长米 粉切割装置机构设计合理,工作过程平稳可靠。     

Community older adults’ attitude towards the use of assistive devices

This study investigates how older adults’ attitude patterns affect assistive devices’ (AD) use in a small-household context of Singapore. Community older adults with physical limitations (n = 481) completed face-to-face interviews for 90 min. Latent Profile Analysis analysed multiple indicators of attitudes towards ADs. Three groups were classified: positive attitude group (PAG); negative attitude group (NAG); and unwillingness to pay for ADs (UPG). PAG was most likely to use ADs, while UPG was least likely to use ADs. The findings are expected to help older adults age in place by improving equal distribution of technology resources that assist with daily tasks and activities.     

On some new randomized item sum techniques

A recent quantified version of item count technique (ICT), called the item sum technique (IST), was developed by Trappmann et al. (2014 Trappmann, M., I. Krumpal, A. Kirchner, and B. Jann. 2014. Item sum—A new technique for asking quantitative sensitive questions. Journal of Survey Statistics and Methodology 2 (1):58–77. doi:10.1093/jssam/smt019.[Crossref] , [Google Scholar]). In this method, two subsamples are required to obtain reliable data on the sensitive issues. In this article, we propose three alternative item sum techniques by utilizing an additional randomization device. The main advantage associated with the current study is that in order to estimate population sensitive parameters, it requires only one sample to obtain reliable data on quantitative sensitive issue without jeopardizing the privacy of participants. Furthermore, it reduces the cost, effort, and time as compared to usual IST. It is also free from the requirement of finding optimum subsample sizes as in the usual IST. The mean and variance of these proposed estimators are also derived and compared with those of the usual IST. Through algebraic and nnumerical comparsions, it is observed that the proposed techniques perform better than the usual IST. Moreover, the proposed randomized IST 3 is observed to be unconditionally more effeicient than the proposed IST 1 and IST 2.     

做好多媒体管理工作 促进教学改革

多媒体在大学教学改革中的作用日益凸显,然而随着多媒体的出现,多媒体管理也随之出现了一些问题。文章通过对这些问题的分析,提出了相应的对策。     

新型全自动打印机共享服务器的研制

分析了目前各种自动打印机共享器存在的不足，设计出一种新型的全自动打印机共享器，阐述了其特点和工作原理．     

大气湍流引发图像畸变的校正研究

用CCD(电荷耦合器件)拍摄远距离目标时,大气湍流使得图像发生畸变,导致CCD无法有效的用于远距离目标的识别与监控。由此该文分析了大气湍流的原理及对图像的主要影响,提出了克服大气湍流影响的有效方法,实验证明,取得较好的效果。     

易安词抒情方式散论

直抒胸臆与曲折见情是易安词中的两种抒情方式,而曲折见情这种抒情方式又是建立在触景生情,设景抒情,创造“微观世界”以抒情及取象引喻、言此意彼等抒情手段的基础上的。     

焊头机构运动建模与仿真技术的研究

为了开发高速高精度焊头机构,确保全自动LED键合机的整机性能,在完成运动方案和结构参数设计后,研究了运用Pro/Engineer运动仿真模块Mechanism/Pro对整个焊头机构进行运动建模的技术与方法,包括机构模型创建、驱动控制等,进行了机构运动仿真;并对仿真结果进行了分析,验证了所设计的焊头机构的可行性和合理性。成功地将设计出的焊头机构应用到整机设备开发,满足了整机功能和性能的要求。该设备已投入实际生产运行。