1^#750m^3高炉停炉实践

莱钢1^#750m^3高炉安全服役12年，采用空料线打水回收煤气停炉，整个过程安全、顺利、快速停炉。残铁口位置选定准确，残铁基本放净，为高炉大修创造了良好条件。     

Dopant segregation in SOI Schottky-barrier MOSFETs

We present experimental results on silicon-on-insulator Schottky-barrier MOSFETs with fully silicided NiSi source and drain contacts. Dopant segregation during silicidation was used to improve the device characteristics: on-currents, significantly higher than without dopant segregation as well as an almost ideal off-state are demonstrated in n-type as well as p-type SB-MOSFETs. Temperature dependent measurements show that the effective Schottky-barrier height in devices with segregation can be strongly lowered. In addition, we investigate the dopant segregation technique with simulations. Comparing simulations with experiments it turns out that the spatial extend of the segregation layer is on the few nanometer scale which is necessary for ultimately scaled devices. Furthermore, the use of ultrathin-body SOI in combination with ultrathin gate oxides results in an even further increased transmission through the Schottky barriers and consequently leads to strongly improved device characteristics. As a result, the dopant segregation technique greatly relaxes the requirement of low Schottky-barrier silicides for high performance transistor devices.     

某深基坑降水方案及涌水事故处理

详细说明了武汉地区某车站的降水及防水设计,并就施工过程中遇到的涌水事件,对设计方案进行补充和修正,对今后此种地质条件下深基坑工程的降水防水设计有良好的借鉴作用。     

Barrier Lyapunov functions for the output tracking control of constrained nonlinear switched systems

In this paper, we investigate the output tracking control problem of constrained nonlinear switched systems in lower triangular form. First, when all the states are subjected to constraints, we employ a Barrier Lyapunov Function (BLF), which grows to infinity whenever its arguments approach some finite limits, to prevent the states from violating the constraints. Based on the simultaneous domination assumption, we design a continuous feedback controller for the switched system, which guarantees that asymptotic output tracking is achieved without transgression of the constraints and all closed-loop signals remain bounded, provided that the initial states are feasible. Then, we further consider the case of asymmetric time-varying output constraints by constructing an appropriate BLF. Finally, the effectiveness of the proposed results is demonstrated with a numerical example.     

海河防潮闸除险加固泄流规模分析

根据海河防潮闸现状过流能力复核成果及防洪排涝规划体系要求,从水工结构设计、施工技术的可能性和经济合理性,以及对闸下清淤工程、运行管理等方面的影响,分析除险加固的泄流规模。     

Analysis of the stress and interfacial reactions in Pt/Ti/SiO2/Si for use with ferroelectric thin films

The microstructure of the Pt/Ti/SiO₂/Si structure has been investigated by scanning and transmission electron microscopy. Pt films of 100 nm thickness deposited by sputtering or evaporation onto unheated substrates gave complete coverage of the underlying Ti layer and showed a granular and faceted structure with grains ∼20 nm in diameter. They did not exhibit hillocks or surface TiO_x formation. X-ray diffraction was used to examine the film stress through use of the sin²ψ method with bulk values for the elastic constants (v=0.39, E=162 GPa). The as-deposited sputtered film had a compressive stress of ∼540 MPa, while the evaporated films had tensile stresses of ∼630 MPa. The films then received a 400°C rapid thermal anneal (RTA) for 90 s and a subsequent RTA of 650°C for 30s. Further investigation of the film stresses and microstructure were made after each annealing step. After the low temperature anneal, the film stress for the sputtered film became tensile. Plan-view sections examined by transmission electron microscopy (TEM) showed that the as-deposited sputtered films were dense but became porous after annealing. Initially, the evaporated films had a less dense microstructure, but were more stable with annealing. Little change in the stress for the evaporated film was observed after this initial low temperature annealing step. Additional annealing of the evaporated and sputtered samples caused complete consumption of the Ti layer including some TiO_x formation from the underlying SiO₂ layer and marked interaction with the Pt; however, little change in the stress was found. The surface of the Pt film revealed larger grains, but otherwise remained unaffected. The underlying phase changes were minimized once the Ti layer had reacted with the Pt. Due to the ratio of the layers, Pt:Ti of 2:1, the surface of the Pt was unaffected.     

南钢8号高炉炉墙结厚分析及处理

南钢炼铁新厂8号高炉（2 000m3）由于原料质量的不稳定、渣系的变化,上下部操作调剂的不匹配等原因造成炉身部位圆周方向结厚,通过采取＂降料线打水,强力疏松边缘气流,调整风口配置＂等措施,历时42天,炉墙粘结脱落,炉型规整,炉况恢复正常。     

The effect of small dose of topiroxostat on serum uric acid in patients receiving hemodialysis

Introduction : Topiroxostat, a recently developed xanthine oxidase inhibitor, is expected to have fewer adverse effects than allopurinol because it has different mechanism of action from alloprinol. However, its dosage, usage and safety have not been established in patients with impaired renal function or those undergoing dialysis at the development since no studies was conducted in these patients. Methods : Cross over clinical trial using 3 months of allopurinol and topiroxostat on 27 maintain Japanese HD patients were carried out. The effects on oxidative stress status of both drugs were also evaluated by measuring oxidation reduction potential. Findings : Twenty‐five of twenty‐seven patients completed study. The mean serum uric acid levels in the topiroxostat‐treated arm was significantly lower than it in the allopurinol‐treated arm time‐dependently (P < 0.0001). Corrected oxidative stress ratio defined as biological antioxidant potential/diacron reactive oxygen metabolites was significantly increased in topiroxostat‐arm (*P = 0.0035), but not in allopurinol‐arm (P = 0.1429). No significant difference was seen in diacron reactive oxygen metabolites, biological antioxidant potential, static oxidation‐reduction potential, and capacity oxidation‐reduction potential between pre and post treatment of both drugs. Discussion : It is suggested that a low dose of topiroxostat decreased serum uric acid sufficiently to maintain it below 7.0 mg/dL in patients receiving hemodialysis.     

Barrier properties of carbon films deposited on polymer-based devices in aggressive environments

The physical and chemical properties of diamond-like carbon (DLC) and carbyne-containing films on different substances, in particular on plastic materials, are advantageous for a great number of novel applications. These coatings, which possess the necessary mechanical characteristics of high adhesion to the plastic substrate material, chemical inertness and biocompatibility, have been proved to be hypoallergenic. In present paper, we report on the use of DLC and carbyne-containing films, formed by different ion-assisted methods, for strengthening and protecting of the surface of polymer-based medical products and for providing new functional properties. The medical products examined are: probes of different type, catheters, drainage tubes, polymer contact lenses and contact lens cases. It is shown that the DLC and carbyne-containing films are biocompatible, possess high chemical inertness to biological media of the human body, and provide the necessary rigidity to products. Antibacterial activity, a wide range of contact wetting angle changes, and a wide range of optical and colour characteristics open unlimited possibilities for the improvement of medical wares. Results on the mechanical properties of probes and contact lenses coated by carbon films, both from in vitro and clinical testing, are also presented.     

新型功能性食品添加剂——植物甾醇类

植物甾醇,包括甾烷醇及其酯的形式,是一类具有降低血清胆固醇作用的功能因子。本文介绍了它的分类、物化性质、生理活性、产品开发方面的概况。