他操控了时间

对于一般人而言,一只名表意味着身份的象征。仿佛一个人的价值可以由品牌的知名度、价格的昂贵所衡量、代替和增值。但反过来说．名人同样可以赋予一块普通的表以非凡的纪念意义，因此身价倍增．成为收藏家和拍卖会上的宠儿。名表，不是名牌表，而是名人戴过的表。这同样体现了商品的交换价值。

逃离“象牙塔”——不确定性时代的大学与知识生产

近年来,随着高等教育的嬗变和经济形势的下行,高校的生态也发生了深刻变化。由于就业压力使然,在高度不确定性的助推下,越来越多的毕业生涌向体制内。而随着“非升即走”等人事制度的普遍推行,高校教职对青年学子的吸引力大幅降低。学术体制遭遇了系统性挑战。现行体制过于强调审计文化、量化考核和项目化管理,这在短期内拉升高校学术产出的同时,也明显抑制了知识生产活动的原创性,加大了高校教师的额外负担。这对知识生产系统的可持续发展产生了深远影响。在此形势下,整个高校系统的知识生产亟待调整,有必要切实推进人事制度和评价体系等方面的纵深变革,重建一种更友善、更具创新活力的智识环境。

Time-delayed bilateral teleoperation using wave variable with prediction in three channel control architecture

This paper proposes a novel method for incorporating wave domain prediction in a three-channel(3CH)architecture,which is the optimal architecture from a transparency point of view,to overcome the poor transparency problem of using the wave variable method in a time-delay teleoperation system.A 3CH teleoperation control architecture is established by selecting parameters of the 4CH architecture sensibly for the system without force sensor in the master side.The communication channel is divided into a two-port model by combining force and velocity information reasonably to extend the wave variable method to a 3CH architecture.Then the I/O signal of the two-port model is transformed into wave variable.A predictor is added to the wave domain of the master side to further improve the transparency of the system,and a regulator is designed to ensure the passivity of the predictor.Experimental results show that the proposed method can guarantee stability and improve the transparency of the teleoperation system with time-delay.

以后动画构筑行为艺术——谢德庆的早期实践

谢德庆是最早利用后动画方式创作的艺术家之一,他的成名作《打卡》中便采用了这一方式。将宏观的时间,通过行为及动画压缩到微观,改变了时空维度,这是这个作品呈现的方式。