湿法冶炼浸出过程H∞优化控制研究与设计

应用H∞优化控制方法对锌湿法冶炼浸出过程进行H∞优化控制器设计,同时,讨论了如何把浸出过程控制问题转化为H∞优化控制问题、浸出过程的输入输出量和H∞标准控制问题各量之间的关系及其物理意义.通过仿真实验,给出了几种情况下的仿真曲线,并进行了分析,从而得出结论.     

Effect of H_2 dilution on the structure and properties of nc-CrC/a-C:H coatings deposited by a hybrid beams system

Nanocomposite Cr C/hydrogenated amorphous carbon(nc-CrC/a-C:H) coatings were deposited by a hybrid beams system comprised of a hollow cathode ion source and a cathodic arc ion-plating unit with varying H_2 flow rates. The influences of H_2 flow rates on the morphologies, microstructures, and properties of the coatings were systematically studied. The morphologies and microstructures of the coatings were characterized by SEM, AFM, XPS, Raman spectroscopy, GIXRD, and HRTEM. The mechanical and tribological properties were measured by a nano-indenter, scratch tester, and ball-ondisk tribometer. The wear tracks were evaluated using 3D profilometer, optical microscope, and EDS analysis. It has been found that a moderate H_2 flow rate can effectively smooth the surface, enlarge the fraction of a sp~3 bond, and improve the properties. The coating exhibits the highest hardness and elastic modulus at the H_2 flow rate of 40 sccm. A superior combination of adhesion strength,friction coefficient, and wear resistance can be achieved at the H_2 flow rate of 80 sccm.     

金属拱型屋面板的开发与应用

简要介绍了武钢Ｗ６６６金属拱型层面板的开发、设计、试验研究及应用情况,探讨了理论分析的方法和应用前景。     

Invariant Deformation Element Model Interpretation to the Crystallography of Diffusional Body-Centered-Cube to Face-Centered-Cube Phase Transformations

The crystallography of body-centered-cube to face-centered cube (bcc-to-fcc) diffusion phase transformations in a duplex stainless steel and a Cu-Zn alloy, including long axis, orientation relationship (OR), habit plane (HP), and dislocation spacing, is successfully interpreted with one-step rotation from the Bain lattice relationship by applying a simplified invariant line (IL) analysis. It is proposed that the dislocation slipping direction in the matrix plays an important role in controlling the crystallography of precipitation.     

城市“社区化”产住一体的新回归模式

中国城市增长的重要形态是郊区型开发区扩张,这种扩张,因功能单一而容易导致城市居民就业与居住的高度分离,并引发了一系列城市社会问题。反之,社区化形态的都市产业空间与生活开发,有助于实现产住一体化,以及产业、居住、商业、生活功能的聚合,从而更好地实现城市集约化、便利化和精明化增长。     

M16C62在μC/OS-II嵌入式系统中的应用

μC/OS-Ⅱ是一个源码公开的实时嵌入式操作系统,它的特点在于公开的源代码,很强的移植性,占先式多任务,每个任务有单独的栈,中断管理及很强的稳定性与可靠性等,目前越来越受到实时嵌入式系统设计者的关注,本文详细讲述了如何把μC/OS-II操作系统移植到M16C62单片机中,并给出了以M16C62单片机为核心处理器构成的一个实时多任务系统的设计方案。     

A novel intelligent verification platform based on a structured analysis model

An intelligent verification platform based on a structured analysis model is presented.Using an abstract model mechanism with specific signal interfaces for user callback,the unified structured analysis data,shared by the electronic system level design,functional verification,and performance evaluation,enables efficient management review,auto-generation of code,and modeling in the transaction level.We introduce the class tree,flow parameter diagram,structured flow chart,and event-driven finite state machine as structured analysis models.As a sand table to carry maps from different perspectives and levels via an engine,this highly reusable platform provides the mapping topology to search for unintended consequences and the graph theory for comprehensive coverage and smart test cases.Experimental results show that the engine generates efficient test sequences,with a sharp increase in coverage for the same vector count compared with a random test.     

Preparation and structure of fluorinated/non-fluorinated polyacrylate gradient emulsion blend film

The emulsion blend method, which is environmentally friendly and energy saving, was used to prepare a compositional gradient film of fluorinated/non-fluorinated polyacrylate in this paper. The size and glass-transition temperature (T_g) of the emulsion particles were designed to enhance the driving force of their selective congregation and promote the formation of gradient structure. The structures and surface properties of the obtained films were characterized. The results showed that when the fluorinated components have much smaller particle size and higher T_g than those of fluorine-free polyacrylate components, the gradient structures formed in the direction across the film thickness of the films. The concentration of the fluorinated component increased gradually from film-glass interface to film-air interface in the blend film, making the surface free energies of the two sides of the gradient film distinctively different.