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A well-known outcome of down-scaling into micrometer dimensions is the dominance of surface over bulk phenomena. When designing micro-scale systems, the ability to understand and modify surface properties is of utmost importance. A key concept is the “programmable surface” - an interface whose properties can be controlled with high spatial and temporal resolution. This presentation introduces several...
The semiconductor- and the new growing up micro and nano manufacturing industry needs more and more precise drive systems with a high accuracy positioning behavior for their production. For example to inspect wavers of the new 32/28 nm Clarkdale and Arandale Chip series from Intel, waver inspection systems are required which stabilizes the moved waver within a 3-dimensional cube of 10nm. The new 22/20...
This paper introduces the establishment and simplification of the temperature field and the general calculation method of temperature stress of the prestressed concrete box girders. Data from some research was extracted and the relative errors of the calculation and observation were compared. We indicate that the study of temperature field and thermal stress of prestressed concrete box girders is...
In order to improve the ignition reliability of small scale liquid rocket, a multipoint electric ignition method has been proposed. A pulse electric ignition device with the sequence circuit is designed which is composed of ignition sequence circuit model and boosting circuit model. The operational principle of the pulse ignition device has been analyzed.
Integration and Informatization management of engineering project is the effective way to improve project management. How to use the limited resource and the lowest cost to implement integrated management is the goal of the project manager. On the ground of analyzing characteristics of modern chemical engineering project design, This paper focuses on quality control, progress control and coordination...
In order to improve the structural performance of a five-axis gantry milling machine, a design idea of adopting parallel optimum design for key components and complete machine was investigated. Using CAE (Computer Aided Engineering) software, the finite element analysis model of the five-axis gantry milling machine key components and the complete machine were established. Then the static stiffness...
The topology optimization of YKS5120B-3 NC gear shaper machine tool bed is completed based on ANSYS with the shape envelope of the whole tool bed as solution domain and the minimum static compliance as objective function. The optimal topology model of the tool bed is obtained. And then the tool bed model is reconstructed in Pro/E and re-tested by static and dynamic analysis in ANSAYS. The re-tested...
This paper forms the CAD mathematical model for the working line of parallel indexing cam through the analyzing of the principle of parallel indexing cam, at the same time, gives the specific designing calculation procedure, thus reduces the complex designing, abbreviates the designing period, increasing the designing precision.
The concern of keeping balance with ecological environment and historic context is the dominant trend of modern urban design in theory and practice. This paper is based on the project of "Urban Design for the Core Area of Jingzhou High-Tech Industrial Development Zone". The question is around how to design for a city with natural features and historic context, or how to include in this urban...
Now the state norms of the bridge falsework have not yet been promulgated, and falsework design theory is seriously inadequate, which make it hard to guarantee the stability of bridge falsework and results in a series of bridge falsework collapse accidents in recent years. Based on the test of overall stability of the bridge falsework, AHP is used to give scoring weight to effect factors-the scoring...
Mathematical modeling represents an efficient method allowing us to examine properties of a researched object. This article will present the design of an analytic model of a jet engine (MPM-20 engine in particular) that will be used to set the operational envelope of the engine for further use in a control system that will be limited by this envelope.
With the constantly development of large space, the fire prevention of large space building is also increasingly important, but the traditional fire extinguishing system can not satisfy the requirements of fire extinguishing of interior large space. An intelligent fire extinguishing system of interior large space that using the single chip microcomputer SPCE061A as the main controller was designed...
New trends of urban design have been formed in digital and ecological age.Taking the urban design of Changfeng culture business core of Taiyuan as an example,the paper discusses the new concept in the aspects of ecology, humanities, charm, digital, sustainability,etc. It points out that digital technology and eco-technology will usher in a new revolution of urban design field . Urban design will achieve...
This paper focuses on complete and systematic application of discrete-event simulation in Distribution Center (DC) design procedure. A framework of simulation application in DC design is given on basis of extensive literature review. Six main steps of DC design and specific aspects for each step in which simulation is always helpful are involved in this framework. Four kinds of functions of simulation...
This paper presented an innovative use of a variable steel-concrete composite section for the main arch ribs to take combined advantages of steel and concrete strength. And vertical erection method that can significantly simplify and accelerate arch bridge construction with better structure integrity and higher stability during construction is developed. Since steel construction is superior to RC...
The diversity of railway gauge is caused by historical reasons, and its shortcomings have been exposed to Modern railway transportation. At present, the solutions to Logistics and transport issues between different gauge railways are mainly to change transport equipment. And different ways to replace Bogie will affect the size of the frontier transshipping station, operating efficiency and investment...
The purpose of this study was to compare comfort and risk between common bedding system and adjusted postures in continuous and separated given postures. Eighteen subjects took part in the measurement on flat bed and two types of adjustable care beds. Motion limitation and subtle influencing factors were also identified according to reflection of subjects. A virtual man-bed system was established...
According to the demand of exploitating the poor-thin oil layer in Daqing oilfield, retrievable bridge plug is designed. The seal capacity and the clamping function which are respectively accomplished through the seal ring and the slip are the key techniques of bridge plug. For the aim of designing the seals better to generate an effective sealing effect against the well wall, firstly, the sealing...
Establishment of the optimal objective function is the first and a vital step for optimum design. The foundation pit engineering design is a procedure of multi-objective optimization and multi-objective decision. Some of these objectives can be quantitatively calculated, while others cannot. In order to make a comprehensive analysis of the effects of various factors on the optimum design of foundation...
Base isolation is one of the most promising alternatives among the structure control methods. In recent decades, base isolation has been seriously considered for civil structures, such as buildings and bridges, subjected to ground motion. Seismic isolation technique had been applied successfully abroad, especially in Japan, and buildings with seismic isolation design had good performances in the earthquakes...
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