Cross-section control of stacked nanowires formed by Bosch process and oxidation

The cross-sectional shape of the stacked silicon nanowires (SiNWs) formed by the Bosch process and stress-limited oxidation is studied in this paper. Under the condition of high temperature oxidation, the resulting nanowires highly resemble the initial shapes resulting by the Bosch process. The effects of etching and passivation in the Bosch process are modeled to provide a guideline to control the cross-section of the stacked nanowires.     

On Global Robust Stability of a Class of Delayed Neural Networks with Discontinuous Activation Functions and Norm-Bounded Uncertainty

This paper considers the problem of global robust stability of a class of uncertain delayed neural networks with discontinuous activation functions. The uncertainties are assumed to be norm-bounded. In the form of linear matrix inequality (LMI), a new sufficient condition is obtained for the robust stability of this class of neural networks based on Lyapunov–Krasovskii stability theory as well as Filippov theory. Our conditions are independent of the delay and easy to check. A numerical example is given to show the effectiveness and superiority of our results.     

螺杆式机组油分离器的设计、应用分析及发展方向

系统地介绍螺杆式机组油分离器的工作原理,详细分析螺杆式机组油分离器的设计原则、应用分析案例及发展方向,给出一些经验参数和实例,可供制冷设备生产厂商及设计院、用户参考。     

常压装置基准能耗计算与节能分析

通过计算中原油田石油化工总厂常压装置的基准能耗、能耗因数,并与国外同类型先进装置的用能水平进行了对比。分析了常压装置能耗高的原因,提出了节能改造措施。改造后加热炉排烟温度由210℃下降到185℃,建立了低温热回收系统,与催化装置实现了热原料互供,换热终温提高到295℃,装置实际能耗由11.03kg标煤/t下降到9.5kg标煤/t。     

萨中油田注水井化学浅调剖效果评价

注水井化学浅调剖剂是在高渗透层形成凝胶体以堵塞岩石孔隙,降低其渗透率,有效地控制水的锥进.大庆油田采油一厂应用的浅调剖剂主要是低初始黏度的LV调剖剂,该调剖剂最大的优点是破胶时间长,可达到2年以上.注水井化学调剖后,随着注水结构的改善,井区连通油井见到控水效果.统计分析相连通的196口未措施油井,对比调剖后的增油效果,从中可以看出,平均单井日增油0.35 t,日降水1.47 m3,目前累计增油1.2×104t,降水5.2×104m3.     

Tubular membrane cathodes for scalable power generation in microbial fuel cells

One of the greatest challenges for using microbial fuel cells (MFCs) for wastewater treatment is creating a scalable architecture that provides large surface areas for oxygen reduction at the cathode and bacteria growth on the anode. We demonstrate here a scalable cathode concept by showing that a tubular ultrafiltration membrane with a conductive graphite coating and a nonprecious metal catalyst (CoTMPP) can be used to produce power in an MFC. Using a carbon paper anode (surface area Aan = 7 cm2, surface area per reactor volume Aan,s = 25 m2/m3), an MFC with two 3-cm tube cathodes (Acat = 27 cm2, Acat,s = 84 m2/m3) generated up to 8.8 W/m3 (403 mW/m2) using glucose [0.8 g/L in a 50 mM phosphate buffer solution (PBS)], which was only slightly less than that produced using a carbon paper cathode with a Pt catalyst (9.9 W/m3, 394 mW/m2; Acat= 7 cm2, Acat,s= 25 m2/m3). Coulombic efficiencies (CEs) with carbon paper anodes were 25-40% with tube cathodes (CoTMPP), compared to 7-19% with a carbon paper cathode. When a high-surface-area graphite brush anode was used (Aan = 2235 cm2, Aan,s = 7700 m2/m3) with two tube cathodes placed inside the reactor (Acat = 27 cm2, Acas, = 93 m2/m3), the MFC produced 17.7 W/m3 with a CE = 70-74% (200 mM PBS). Further increases in the surface area of the tube cathodes to 54 cm2 (120 m2/m3) increased the total power output (from 0.51 to 0.83 mW), but the increase in volume resulted in a constant volumetric power density (approximately 18 W/m3). These results demonstrate that an MFC design using tubular cathodes coated with nonprecious metal catalysts, and brush anodes, is a promising architecture that is intrinsically scalable for creating larger systems. Further increases in power output will be possible through the development of cathodes with lower internal resistances.     

羊绒混纺纱的开发生产

介绍了羊绒与精梳棉混纺的原料选择，工艺流程，生产工艺及关键技术措施，并阐明了成纱质量测试情况。     

伴大豆球蛋白胃蛋白酶水解肽对双歧杆菌增殖的影响

大豆种子的贮藏蛋白主要由2种球蛋白组成,伴大豆球蛋白(conglycinin)是其中一种,它由3个不同的亚基组成。文中对伴大豆球蛋白进行了分离纯化,并研究了其体外经过胃蛋白酶水解后的肽对双歧杆菌增殖的影响。结果表明,分离纯化的伴大豆球蛋白纯度为90.13％,可供生理功能的研究,经胃蛋白酶水解后的肽能够促进双歧杆菌的增殖,表现出一定的生物活性作用。     

磷化液总酸度的研究

引进了净总酸度的概念，在大量实验数据的基础上，利用回归统计方法，探讨了锌系磷化液中净总酸度与ＣＺｎ２＋和ＣＨ２ＰＯ－４的定量函数关系，举例说明在实际生产中的应用。     

天然彩色棉针织产品的设计

以天然彩色棉的原料搭配和针织物组织结构的创新为切入点，列举了部分天然彩色棉针织新产品开发的实例，并对其方法和途径进行了探讨分析。