美国蒙特克莱尔州立大学内部管理机制及特点

研究美国高等教育的管理模式。以蒙特克莱尔州立大学的管理机制为例,探讨该大学共同治理、分权制衡、管理充分民主化、突出学术主体地位的管理特色。美国大学在管理过程中也存在诸多问题,但其分权式管理模式便于权力间的互相监督和互相制约。为我国大学的管理改革提供有效参考。     

High-efficiency aircraft antiskid brake control algorithm via runway condition identification based on an on-off valve array

The aircraft antiskid braking system is an important hydraulic system for preventing tire bursts and ensuring safe take-off and landing. The brake system adjusts the force applied on the brake discs by controlling the brake pressure. Traditional aircraft antiskid braking systems achieve antiskid performance by controlling the braking pressure with an electrohydraulic servo valve. Because the pilot stage of an electrohydraulic servo valve is easily blocked by carbonized hydraulic oil, the servo valve would become a dangerous weak point for aircraft safety. This paper proposes a new approach that uses an on-off valve array to replace the servo valve for pressure control. Based on this new pressure control component, an efficient antiskid control algorithm that can utilize this discontinuous feature is proposed. Furthermore, the algorithm has the ability to identify the runway circumstances. To overcome the discontinuity in the process of using an on-off valve array, the Filippov framework is introduced. The conditions of convergence of the system are also discussed. The results of the digital simulations and the hardware-in-the-loop (HIL) braking experiments are used to verify the efficiency and stability of the proposed control algorithm. The method also proves that the on-off valve array can replace the servo valve perfectly as a new type of antiskid braking pressure control component.     

高校工会与新时期师德师风建设

通过分析新时期师德师风建设存在的问题及原因,阐述了高校工会在师德师风建设中的地位、作用,并对如何提高师德师风教育的有效性提出了教育、制度、组织、示范等四项工程。     

学校文化在高校管理中的作用——对高校本科教学评估的反思

全国高校教学评估工作在很大程度上促进了各高校的工作，但也应看到，还有一些评价标准、内容存在的问题不容忽视，其中学校文化在高校改革与发展中具有不可替代的重要作用。笔者建议，从凸显学校文化的价值观、营造和谐的校园文化以及倡导以人为本的管理体制等几方面着手，使高校的管理工作更加高效，有序。     

浅谈高校财务预算的编制与执行

高校财务预算是财务管理的核心，一切财务活动都是对预算执行情况的反映。因此，编制科学、合理的预算，就要遵循一定的编制原则，按照一定的方法，使预算更加接近实际，切实可行。     

影响大学生心理素质的因素及大学生心理问题分析

在当今社会,我国大学生心理健康问题已经十分突出,已成为全社会关注的重点问题.根据大学生的特点,分析引起不良心理素质的因素和主要的心理问题,是做好大学生心理健康教育的前提条件.     

论新时期高校学报编辑的创新意识和历史责任

当社会发展进入高科技信息为主导的知识经济时期,高校学报发展面临着机遇和挑战,学报编辑只有认清形势、优化编辑意识、提高服务意识、全方位提高自身素质,依靠编辑强烈的责任心和过硬的业务本领,才能承担历史赋予的责任。     

Experimental investigation on dynamic response of flat blades with underplatform dampers

One test rig with three blades and two Under-Platform Dampers (UPDs) is established to better understand the dynamical behavior of blades with UPDs. A pre-loaded spring is used to simulate the centrifugal load acting on the damper, thereby achieving continuous adjustment of the pressing load. UPDs with different forms, sizes and materials are carefully designed as experimental control groups. Noncontact measurement via a laser Doppler velocimeter is employed and contact excitation which is performed by an electromagnetic exciter is adopted to directly obtain the magnitude of the excitation load by a force sensor mounted on the excitation rod. Particular attention is paid to the influence of the contact status of the contact surfaces, e.g. the pressure-sensitive paper is used to measure the effective contact area of the UPDs. The experimental variables are selected as the centrifugal force, the amplitude of the excitation force, the damper mass, the effective contact area, and the damper material. The Frequency Response Function (FRF) of the blade under different experimental parameters is obtained by slow frequency sweep under sinusoidal excitation to study the influence of each parameter on the dynamic characteristics of the blade and the mechanism analysis is carried out combined with the experimental results.     

高校开展软式排球运动的可行性探讨

为了开展高校体育的健身娱乐 ,改变学生对体育课的偏见和态度 ,提高学生的学习兴趣 ,合理的安排体育学科的科目 ,软式排球运动作为一种新兴的体育项目 ,已逐渐在世界各地得到普及与推广 ,并以其健身性、娱乐性、观赏性 ,难度小 ,重量轻的多种优点 ,很快被广大的师生和民众所接受。为了使排球运动项目在学校体育中的开展 ,吸引更多的学生参加体育锻炼 ,所以有必要在高校体育课上开设软式排球运动项目     

高校图书馆网络安全及应对策略

进入二十一世纪以来,全球性的网络化、信息化进程正改变着人们的生活方式,各高校的图书馆也建立了自己的网络,自己的数字图书馆。但是随之计算机病毒,网络入侵等危害互联网的因素也危害到了各大高校的图书馆网络。本文对威胁高校图书馆网络安全的因素做了简要介绍并对防范措施进行了说明。