Product Assembly Cost Estimation Based on Artificial Neural Networks

1　ＩｎｔｒｏｄｕｃｔｉｏｎＤｕｒｉｎｇｔｈｅｐｒｏｄｕｃｔｄｅｓｉｇｎｓｔａｇｅ ,ｉｔｉｓｎｅｃｅｓｓａｒｙｔｏｅｓｔｉｍａｔｅｐｒｏｄｕｃｔｃｏｓｔｓｏｔｈａｔｗｅｃａｎｕｓｅｔｈｉｓｉｎｆｏｒｍａｔｉｏｎｔｏｅｖａｌｕａｔｅｔｈｅｐｒｏｄｕｃｔｄｅｓｉｇｎｅｃｏｎｏｍｉｃａｌｌｙ ,ｔｏａｄｊｕｓｔｔｈｅｄｅｓｉｇｎｓｃｈｅｍｅｔｏｒｅｄｕｃｅｃｏｓｔｉｎｔｉｍｅａｎｄａｓａｃｏｎｓｅｑｕｅｎｃｅｔｏｃｏｎｔｒｏｌｔｈｅｐｒｏｄｕｃｔｃｏｓｔｅｆｆｅｃｔｉｖｅｌｙ .Ｔｈｅｐｒｏｄｕｃｔｃｏｓ…     

A New Method for Rolling Element Bearing Fault Diagnosis Based on Cyclostationary Theory

1　ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｃｙｃｌｏｓｔａｔｉｏｎａｒｙｓｉｇｎａｌｉｓａｓｐｅｃｉａｌｋｉｎｄｏｆｎｏｎ ｓｔａｔｉｏｎａｒｙｓｉｇｎａｌ,ｉｎｗｈｉｃｈｔｈｅｓｔａｔｉｓｔｉｃｓｖａｒｙｗｉｔｈｔｉｍｅｐｅｒｉｏｄｉｃａｌｌｙｏｒｐｏｌｙｐｅｒｉｏｄｉｃａｌｌｙ (ｗｉｔｈｍｕｌｔｉｐｌｅｉｎｃｏｍｍｅｎｓｕｒａｔｅｐｅｒｉｏｄｓ) .Ｔｈｅｕｎｉｑｕｅｃｈａｒａｃｔｅｒｉｓｔｉｃｓｈｏｗｓｔｈａｔｔｈｅｍｅｔｈｏｄｓｂａｓｅｄｏｎｃｙｃｌｏｓｔａｔｉｏｎａｒｙｔｈｅｏｒｙｎｅｃｅｓｓａｒｉ…     

Grey System Judgment on Reliability of Mechanical Equipment

1　ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｒｅｌｉａｂｉｌｉｔｙｏｆｍａｃｈｉｎｅｅｑｕｉｐｍｅｎｔｗａｓａｇｅｎｅｒａｌｌｙｃｏｎｃｅｒｎｅｄｐｒｏｂｌｅｍｏｎｃｈｏｏｓｉｎｇｔｙｐｅｓ ,ｕｓｅａｎｄｍａｉｎｔｅｎａｎｃｅｏｆｅｑｕｉｐｍｅｎｔａｎｄｓｏｏｎｉｎｔｈｅｗｈｏｌｅｃｏｕｒｓｅ.Ｔｈｅｍａｃｈｉｎｅｅｑｕｉｐｍｅｎｔｃｏｎｓｉｓｔｅｄｏｆａｃｏｍｐｌｉｃａｔｅｄｓｙｓｔｅｍ .Ｗｈｅｎｃｈｏｏｓｉｎｇｔｈｅｔｙｐｅｓ ,ｉｔｃｏｕｌｄｃａｒｒｙｏｕｔｏｐｔｉｍｕｍｄｅｃｉｓｉｏｎ ｍａｋｉｎｇｏ…     

A Numerical Tele-service System and its Realization on a PC-PLC Network

1　ＩｎｔｒｏｄｕｃｔｉｏｎＴｅｌｅ ｓｅｒｖｉｃｅｓｙｓｔｅｍｓｉｎｔｈｅｄｏｍａｉｎｏｆｍａｎｕｆａｃｔｕｒｉｎｇｒｅｆｅｒｓｔｏｓｙｓｔｅｍｓｔｈａｔａｒｅｍｏｎｉｔｏｒｉｎｇａｎｄｃｏｎｔｒｏｌｌｉｎｇｒｅｍｏｔｅｐｒｏｄｕｃｔｉｏｎｐｒｏｃｅｓｓｅｓ,ａｎｄｉｎｔｅｒｖｅｎｉｎｇａｎｄｍａｉｎｔａｉｎｉｎｇｔｈｅｍｗｈｅｎｎｅｃｅｓｓａｒｙ .Ｆｒｏｍｔｈｅｖｉｅｗｏｆａｆｌｅｘｉｂｌｅｍａｎｕｆａｃｔｕｒｉｎｇｓｙｓｔｅｍ (ＦＭＳ) ,ａｔｅｌｅ ｓｅｒｖｉｃｅｓｙｓｔｅｍｆｏｒｍａｎｕｆａ…     

MECHANO-ACTIVATED SURFACE MODIFICATION OF CALCIUM CARBONATE PARTICLES IN AQUEOUS MEDIUM

Ｆｉｎｅｌｙｇｒｏｕｎｄｃａｌｃｉｕｍｃａｒｂｏｎａｔｅｈａｓｂｅｅｎｗｉｄｅｌｙａｐｐｌｉｅｄａｓｔｈｅｆｉｌｌｅｒｍａｔｅｒｉａｌ．Ｈｏｗｅｖｅｒ,ｉｔｉｓｅｓｓｅｎｔｉａｌｔｏｍａｋｅｔｈｅｈｙｄｒｏｐｈｉｌｉｃｃａｌｃｉｕｍｃａｒｂｏｎａｔｅｐａｒｔｉｃｌｅｓｃｏｍｐａｔｉｂｌｅｗｉｔｈｔｈｅｍａｔｒｉｘ,ｓｕｃｈａｓｐｌａｓｔｉｃｓ,ｒｕｂｂｅｒａｎｄａｄｈｅｓｉｖｅｓ．Ｓｕｒｆａｃｅｍｏｄｉｆｉｃａｔｉｏｎｉｓｃｏｍｍｏｎｌｙｕｓｅｄｔｏａｃｈｉｅｖｅｔｈｉｓｐｕｒｐｏｓｅ．Ｓｕｒｆ…     

Testing Research of Accumulator Performance in the Hydro-pneumatic Suspension of a Vehicle

1　ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅａｃｕｍｕｌａｔｏｒｉｓａｋｅｙｃｏｍｐｏｎｅｎｔｉｎｈｙｄｒｏ ｐｎｅｕｍａｔｉｃｓｕｓｐｅｎｓｉｏｎ .Ｉｔｉｓｎｏｔａｃｏｍｐｏｎｅｎｔｏｆａｃｃｕ ｍｕｌａｔｉｖｅｅｎｅｒｇｙｔｒａｄｉｔｉｏｎａｌｌｙｂｕｔａｓｐｒｉｎｇｃｏｍｐｏｎｅｎｔｓｉｍｉｌａｒｔｏａｓｔｅｅｌｐｌａｔｅｓｐｒｉｎｇ[7] .Ｉｔｓｐｅｒｆｏｒ ｍａｎｃｅｄｉｒｅｃｔｌｙａｆｆｅｃｔｓｔｈｅｓｔｉｆｆｎｅｓｓｐｅｒｆｏｒｍａｎｃｅｏｆｔｈｅｈｙｄｒｏ ｐｎｅｕｍａｔｉｃｓｕｓｐｅｎｓｉｏｎ .…     

A Modified Cost Estimation Formulae for Calculating Manufacturing Cost of Injection Part/Mold

1　ＩｎｔｒｏｄｕｃｔｉｏｎＴｏｔｈｅｉｎｊｅｃｔｉｏｎｐａｒｔｍａｎｕｆａｃｔｕｒｅｒｓａｎｄｉｎｊｅｃｔｉｏｎｍｏｌｄｍａｎｕｆａｃｔｕｒｅｒｓ,ｉｔｗｉｌｌｂｅｏｆｇｒｅａｔｅｃｏｎｏｍｉ ｃａｌｖａｌｕｅｓｔｏｄｅｃｉｄｅｔｈｅｍａｎｕｆａｃｔｕｒｉｎｇｃｏｓｔｓａｓｅａｒｌｙａｓｐｏｓｓｉｂｌｅ.Ｉｔｃａｎｒｅｄｕｃｅｔｈｅｃｏｓｔ,ｅｎｈａｎｃｅｔｈｅｍａｎｕｆａｃｔｕｒｉｎｇｅｆｆｉｃｉｅｎｃｙ ,ａｎｄｉｍｐｒｏｖｅｔｈｅｂｅｎｅｆｉｔｓｏｆｔｈｅｆａｃｔｏｒｙ .Ｉｔｉｓｏｂｖｉｏｕｓ…     

Elementary Analysis on the Technological Features of an Engineering Equipment Facile Diagnosis System

1　ＩｎｔｒｉｄｕｃｔｉｏｎＴｈｅｔｅｃｈｎｏｌｏｇｙｏｆｅｎｇｉｎｅｅｒｉｎｇｅｑｕｉｐｍｅｎｔｆａｕｌｔｄｉａｇｎｏｓｅｓｉｎＣｈｉｎａｅｘｐｅｒｉｅｎｃｅｄｔｈｒｅｅｓｕｃｃｅｓｓｉｖｅｄｅ ｖｅｌｏｐｉｎｇｓｔａｇｅｓ.Ｅａｃｈｓｔａｇｅｈａｓｉｔｓｒｅｐｒｅｓｅｎｔａｔｉｖｅｄｉａｇｎｏｓｉｓｔｅｃｈｎｏｌｏｇｙｔｈａｔｃａｍｅｆｒｏｍｔｈｅｍｕｌｔｉ ｓｕｂｊｅｃｔｉｎｔｅｒｃｒｏｓｓ.Ａｔｔｈｅｂｅｇｉｎｎｉｎｇ ,ｔｈｅｐｒｏｂｌｅｍｏｆｍｏｎｉｔｏｒｉｎｇｔｈｅｒｕｎｎｉｎｇｓｔａｔ…     

Energy Method in the Safety Assessment of a Building under Workshop Vibration

1　ＩｎｔｒｏｄｕｃｔｉｏｎＦｏｒｇｉｎｇｗｉｌｌｃａｕｓｅｂｉｇｉｍｐａｃｔｏｒｖｉｂｒａｔｉｏｎ ,ｗｈｉｃｈｗｉｌｌａｆｆｅｃｔｔｈｅｗｏｒｋｓｈｏｐｂｕｉｌｄｉｎｇ’ｓｓａｆｅｔｙｔｈｒｏｕｇｈｔｈｅｐｒｏｐａｇａｔｉｏｎｏｆｔｈｅｆｏｕｎｄａｔｉｏｎａｎｄｓｏｉｌｉｎｔｗｏｗａｙｓ.Ｏｎｅｉｓｔｏｃａｕｓｅｕｎｅｖｅｎｓｕｂｓｉｄｅｎｃｅｏｆｔｈｅｂｕｉｌｄｉｎｇ’ｓｐｉｌｌａｒｆｏｕｎｄａｔｉｏｎ .Ｔｈｅｏｔｈｅｒｉｓｔｏｃａｕｓｅｔｈｅｖｉｂｒａｔｉｏｎｒｅｓｐｏｎｓｅｏｆｔｈｅｂｕｉ…     

On the Method of Air Jet Cooling in Green Manufacturing

1　ＩｎｔｒｏｄｕｃｔｉｏｎＧｒｅｅｎｍａｎｕｆａｃｔｕｒｉｎｇｉｓａｍｏｄｅｒｎｍａｎｕｆａｃｔｕｒｉｎｇｍｏｄｅｗｈｉｃｈｃｏｎｓｉｄｅｒｓｂｏｔｈｔｈｅｅｎｖｉｒｏｎｍｅｎｔａｌｉｍｐａｃｔａｎｄｔｈｅｃｏｓｔｏｆｒｅｓｏｕｒｃｅｓ.Ｉｔｉｎｖｏｌｖｅｓｔｈｅｗｈｏｌｅｐｒｏｄｕｃｔｌｉｆｅｐｅｒｉｏｄ ,ｅｖｅｎｍｕｌｔｉｐｌｅｌｉｆｅｐｅｒｉ ｏｄｓ.Ｔｈｅｅｓｓｅｎｃｅｏｆｇｒｅｅｎｍａｎｕｆａｃｔｕｒｉｎｇｉｓｔｈｅｅｍｂｏｄｉｍｅｎｔｏｆｔｈｅｓｕｓｔａｉｎｅｄｄｅｖｅｌｏｐｍｅｎｔｓ…     

Hardmetals

Uncertainties of supply, diminishing resources and prospects of improved properties have stimulated research on finding substitutes for the constituents in tungsten-carbide/cobalt hardmetals and for finding replacements. The direction of the research varies in different countries and for different applications. The materials involved are hardmetals containing alloy binder phases or complex carbo-nitrides, or are cermets or toughened ceramics.     

声纳动态测向的数据处理方法

提出白噪声多项式最优线性移动平滑滤波算法应用于分离声纳测向精度测量数据中的真实信号和随机噪声,并通过滤波方差比给出对随机误差的压缩程度;对声纳测向精度海上动态测量计算公式给出了完整的理论证明,并推导出更加精确的计算公式。试验结果表明,上述方法对声纳测向精度数据有效、适用。     

自适应时延估计在蛙人超短基线定位中的应用

蛙人超短基线(Ultra-Short Base Line, USBL)定位设备实现浅水环境下高精度定位的关键技术之一是精确的时延估计。由于自适应时延估计方法具备环境自适应能力强的特点,文章将混合调制的拉格朗日直接时延估计方法应用于蛙人USBL定位时的高精度测向上,它可以在信标信号中心频率已知的情况下将小数时延滤波器调制到信号中心频率处,以较低的阶数提供更高的时延估计精度;并根据USBL阵型和信号自身的特点,对混合调制的拉格朗日直接时延估计在低信噪比下的具体使用模式进行了探讨和仿真验证;结果显示,所采用的自适应时延估计方法可以在中低信噪比下提供1°～3°的定位测向精度。     

Construction Principles of an Earth Strain-Metering Antenna

Technical Physics Letters - The principles of construction of an Earth strain-metering antenna on the territory of Russia designed for recording and direction finding of oscillations and waves of a...     

基于方向余弦参量的物坐标系与世界坐标系间的坐标变换

借助物体上三点建立了物坐标系,并给出了其坐标轴的方向余弦计算式。利用矢量代数的方法,推导出以方向余弦为参量的物坐标系到世界坐标系的坐标变换矩阵;利用矩阵求逆的方法,推导出世界坐标系到物坐标系的坐标变换矩阵。作为推论,推导出两种特殊情况的坐标变换矩阵。文中推出的物坐标系与世界坐标系间的两个变换矩阵可作为任意两个坐标系间的坐标变换矩阵,故具有通用性。     

2.4GHz无线电波的相位干涉测向研究

讨论了利用相位差测量2.4 GHz入射电磁波方位角和仰角的方法.在理想情况下分别对接收天线为三元阵和五元阵时对测向系统进行仿真,针对其测向精度比较二者的优劣性.对于五元阵接收到的信号所具有的“相位模糊”问题,采用“虚拟基线法”解相位模糊,提高测向精度.     

Qualitätskontrolle von Rohren aus HDPE

Quality Control of HDPE Pipes. Trials are reported made with the aim of finding an correlation between creep rupture test results obtained with two different types of testing samples: Pipes under internal pressure and tensile rods cut out of these pipes in a longitudinal direction.     

A method for determining the fatigue critical plane for biaxial random vibration in the frequency domain

This paper provides a direct method to determine the critical plane orientation for biaxial random vibration. The critical plane is obtained by finding the direction that maximizes the normal stress variance. It is found that the shear stress is uncorrelated with the normal stress in this orientation. Furthermore, the direction of maximal normal stress is shown to coincide with the principal direction in the case of proportional stress components. Spectral fatigue damage methods proposed in recent literature involve a Monte Carlo enumeration step to find the critical plane orientation. By using the proposed technique, computationally expensive enumeration methods are avoided and greater accuracy in the fatigue damage estimate may result.     

Mechanical Buckling Analysis of Composite Panels with/without Cutouts

A simplified analytical solution suitable for simple stacking sequences was developed using the Euler buckling theory,the structure’ s equations of equilibrium and laminate panel mathematical formulation.Comparing these results with numerical results reveals the accuracy of the method and even more,allows us to validate the numerical analysis.Therefore,two important results are obtained:a simplified analytical solution for the buckling problem and validation of the numerical results.Another important and novel finding is related to the influence of the angle ply orientation and of the cutouts,on the buckling load.Under symmetrical boundary conditions and loading case,rectangular panels with elliptical cutouts,give better results for 90° oriented plies than for 0 oriented ones.With a compression load applied in the X direction,and with material properties 10 times better in X direction than in Y direction,the best results are obtained when the load is aligned with the Y direction associated to the material reference frame.Moreover,panels with cutouts seem to behave better than panels without cutouts under certainply orientation angles.     

磁性油墨的研究进展

综述国内外磁性油墨的研究现状.分析了磁性油墨中的强磁性材料、连接料、填充料和添加料的各种分类、配比及各组分作用,探讨了磁性油墨的研究方向,首次指出:在今后的研究中应该采用纳米级的磁性颜料和复合磁性颜料,选用合成树脂作为连接料,并应重点研究添加料与磁性油墨性能的关系.