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英语原文共 8 页, 一种生成难以反转的负数据库的细粒度算法 摘要:负数据库(NDB)是一种新的隐私保护和信息隐藏技术。它通过存储互补集而不是原始数据来隐藏信息。为了保护隐藏的信息,NDBs应该是难以逆转的。在本文中,我们提出了K-hidden算法来生成难以反转的NDBs(称为K-hidden-NDBs)。K-hidden算法比现有的负数据库生成算法可以用一种更细粒度地方式进行控制。此外,在基于局部搜索策略的SAT求解器方面,我们正式证明了K-hidden-NDBs比典型p-hidden算法生成的NDBs更难以反转。此外,我们证明当NDBs的大小相同时,K-hidden-NDB(根据局部搜索策略)可以比q-hidden-NDB(由q-hidden算法生成的NDBs)更难以反转。最后,对于单元子句的启发式求解,我们证明了K-hidden-NDB可以和q-hidden-NDB一样难以逆转。 关键词:隐私保护;信息隐藏;负数据库;K-SAT
Cultivation of Network Ecological Civilization Consciousness of College Students Chundi Lan*, Haixia He School of Marxism, Jiangxi Normal University, Jiangxi Nanchang,330022, China *aLancd2013@jxnu.edu.cn Abstract The cultivation of college students network ecological civilization consciousness is to cultivate college students positive network ecological security consciousness, civilized network participation consciousness, noble network moral consciousness, good network legal consciousness and good network behavior habit. Cultivating college students awareness of network ecological civilization is conducive to the formation of good Internet habits, physical and mental health,network power and the realization of the goal of beautiful China. However, there are some problems in the cultivation of college students network ecological civilization consciousness, such as the shortage of network ecological civilization environment and the insufficient integration of net
英语原文共 11 页, 自动上料机械手设计 机械工业是国民的装备部,是为国民经济提供装备和为人民生活提供耐用消费品的产业。不论是传统产业,还是新兴产业,都离不开各种各样的机械装备,机械工业所提供装备的性能、质量和成本,对国民经济各部门技术进步和经济效益有很大的和直接的影响。机械工业的规模和技术水平是衡量国家经济实力和科学技术水平的重要标志。因此,世界各国都把发展机械工业作为发展本国经济的战略重点之一。 工业机械手是近几十年发展起来的一种高科技自动化生产设备。工业机械手的是工业机器人的一个重要分支。它的特点是可通过编程来完成各种预期的作业任务,在构造和性能上兼有人和机器各自的优点,尤其体现了人的智能和适应性。机械手作业的准确性和各种环境中完成作业的能力
英语原文共 6 页, 附录 A 译文 生成式设计在机械臂开发中的应用 伊曼纽尔·弗兰卡兰萨,亚历克·费内奇,保罗·库塔哈尔 马耳他大学工业与制造工程系,马耳他,MSD2080 摘 要 随着网络物理生产系统的出现,协作制造环境中对机器人技术的利用也呈上升趋势。满足这种需求的其中一种方法是通过制造可以由中小型企业使用的更便宜,可定制的机器人来使机器人大众化。为了解决这个问题,本研究着眼于使用快速原型技术来开发可在网络物理生产系统中实现可定制的机械臂。因此,这项研究为设计连接的快速原型机械臂提供了一种方法。这种方法同时考虑了实现机械臂所需的软件和硬件开发。此外,生成设计是一种基于进化和人工智能的方法,用于设计机器人关节之间的链接模块。该组件已被认为是使用该方法进行设
英语原文共 26 页, 已接受手稿 文章 在铝基材料激光3D打印过程中,增材多层特征对热力学、应力和微观结构发展的影响 Donghua,Dongdong Gu,Reinhart Poprawe,Mujian xia PII:S2095-9273(17)30247-5 DOI: http://dx.doi.org/10.1016/j.scib.2017.05.007 型号: SCIB 134 出现在:科学公报 收到日期:2017年1月11日 修订日期:2017年4月1日 受理日期:2017年5月2日 请引用本文如下:戴博士,顾博士,R.Poprawe,M.Xia,在铝基材料激光3D打印过程中,增增多层特征对热力学、应力和微观结构发展的影响,《科学公报》(2017年),doi:http://dx.doi.org/10.1016/j.scib.2017.05.007 这是已接受出版的未经编辑的手稿的 PDF 文件。作为为客户提供的服务,我们提供本手稿的早期版本。手稿在以最终形式出版之前,将进行复制编辑、排版和审查结果证明。请注
Spur gear optimization by using genetic algorithm a b s t r a c t This paper involves about the optimization of spur gear set for its center distance, weight and tooth deflections are taken as an objective functions and the decision variable such as module, face width and number of teeth on pinion, and subjected to constraints namely, bending stress, contact stress. Since it is multi-objective function with constraints is very difficult to optimize using conventional optimization techniques, used non-traditional optimization technique called Genetic algorithm. Non-traditional algorithms are very difficult to solve manually. Solutions for the non-traditional methods can be obtained by computerizing algorithms using “C” language. The results are calculated by using “C” language for three materials namely Cast Iron, C-45 and Alloy steel (15Ni2 Cr1). Introduction Gears are used in most types of machinery and vehicles for the transmission of power. The
英语原文共 10 页, 外文翻译 机器人机械手 工业机器人机械手是在生产环境中用以提高生产效率的工具,它能做常规乏味的装配线工作,或能做那些对于工人来说是危险的工作,例如:第一代工业机器人机械手是用来在核电站中更换核燃料棒,如果人去做这项工作,将会遭受有害射线的辐射。工业机器人机械手亦能工作在装配线上将小元件装配到一起,如将电子元件安放在电路印刷板,这样,工人就能从这项乏味的常规工作中解放出来。机器人机械手也能按程序要求用来拆除炸弹,辅助残疾人,在社会的很多应用场合下履行职能。 机器人机械手可以认为是将手臂末端的工具、传感器和手爪移动到程序指定位置的一种机器。当机器人机械手到达位置后,它将执行某种任务。这些任务可以是焊接、密封、机器装料、拆
英语原文共 8 页, 基于自适应非线性算法的智能小车的运动控制 摘要 为了提高智能小车的运动性能,本文设计了一个基于自适应非线性算法的智能小车运动控制系统。本系统由硬件系统和软件系统组成。硬件系统由弹性悬架和伺服机构组成,软件系统主要基于伺服驱动器的自适应控制算法,通过软件编程实现机器人的运动控制。为了测试系统运动控制的可靠性和稳定性,笔者分别对系统进行了MATLAB仿真实验和电机转速测试实验。实验结果表明,该系统具有较高的可靠性和稳定性,可广泛用作研发平台。 关键词 智能小车;自适应控制;伺服驱动;MATLAB仿真;速度检测 目 录 1. 介绍 - 1 - 2. 方法 - 1 - 2.1 可变增益(VG)控制 - 2 - 2.2 自适应前馈 - 2 - 3. 材料系统 - 3 - 3.1 硬件系统 - 3 - 3.1.1弹性悬架 - 3 - 3.
Mechanical Design and Manufacturing Processes Mechanical design is the application of science and technology to devise new or improved products for the purpose of satisfying human needs. It is a vast field of engineering technology which not only concerns itself with the original conception of the product in terms of its size, shape and construction details, but also considers the various factors involved in the manufacture, marketing and use of the product. People who perform the various functions of mechanical design are typically called designers, or design engineers. Mechanical design is basically a creative activity. However, in addition to being innovative, a design engineer must also have a solid background in the areas of mechanical drawing, kinematics, dynamics, materials engineering, strength of materials and manufacturing processes. As stated previously, the purpose of mechanical design is to produce a product which will serve a need for man. Inventions, disco
CHINESE JOURNAL OF MECHANICAL ENGINEERING Effects of Semi-floating Ring Bearing Outer Clearance on the Subsynchronous Oscillation of Turbocharger Rotor Abstract: Semi-floating ring bearing(SFRB) is developed to control the vibration of turbocharger rotor. The outer clearance of SFRB affects the magnitude and frequency of nonlinear whirl motion, which is significant for the design of turbocharger. In order to explore the effects of outer clearance, a transient finite element analysis program for rotor and oil film bearing is built and validated by a published experimental case. The nonlinear dynamic behaviors of rotor-SFRB system are simulated. According to the simulation results, two representative subsynchronous oscillations excited by the two bearings respectively are discovered. As the outer clearance of SFRB increases from 24 mu;m to 60 mu;m, the low-frequency subsynchronous oscillation experiences three steps, including a strong start, a gradual recession and a co
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