求解平面转子本征问题的因式分解方法

讨论了平面转子的可因式分解性,用因式分解的方法求解了平面转子的本征问题,并计算了均匀强电场下平面转子的能级和波函数。     

Numerical simulation and comparison of electrical characteristics between uniaxial strained bulk and SOI FinFETs

In this paper, electrical characteristics of 25 nm strained fin-typed field effect transistors (FinFETs) with oxide-nitride-stacked-capping layer are numerically studied. The FinFETs are fabricated on two different wafers, one is bulk silicon and the other is silicon-on-insulator (SOI) substrate. A three-dimensional device simulation is performed by solving a set of density-gradient-hydrodynamic equations to study device performance including, such as the drain current characteristics (the I_D-V_G and I_D-V_D curves), the drain-induced barrier height lowering, and the subthreshold swing. Comparison between the strained bulk and SOI FinFETs shows that the strained bulk FinFET is promising for emerging multiple-gate nanodevice era according to the manufacturability point of view.     

无功补偿与技术降损简述

就技术线损结合吕梁电网实际进行实例分析，根据电力电容器并联补偿原理和电力系统中的无功设备。提出补偿办法。     

炉内空气分级低NO_x燃烧技术

通过对氮氧化物生成机理的分析,论述了降低氮氧化物生成的基本途径和炉内空气分级燃烧脱硝的基本原理。通过实例考察了火上风量、径向空气分布、炉内氧量、炉内负荷和三次风投停对氮氧化物排放量的影响,说明炉内空气分级燃烧技术是降低煤粉炉NOx排放量的有效方法。     

限制空调出风温度的削峰实效分析

以上海市小陆家嘴金融贸易区为研究对象,通过对2004年空调实施限温措施后的负荷数据与未实施该措施的2001~2003年的负荷数据进行比较分析,考察限制空调出风温度为26℃对地区电力负荷的影响,探讨限制空调出风温度对削减夏季峰值负荷的可行性。     

Silicon-Germanium Structure in Surrounding-Gate Strained Silicon Nanowire Field Effect Transistors

In this paper we numerically examine the electrical characteristics of surrounding-gate strained silicon nanowire field effect transistors (FETs) by changing the radius (R_SiGe) of silicon-germanium (SiGe) wire. Due to the higher electron mobility, the n-type FETs with strained silicon channel films do enhance driving capability (∼8% increment on the drain current) in comparison with the pure Si one. The leakage current and transfer characteristics, the threshold-voltage (V_t), the drain induced barrier height lowering (DIBL), and the gate capacitance (C_G) are estimated with respect to different gate length (L_G), gate bias (V_G), and R_SiGe. For short channel effects, such as V_t roll-off and DIBL, the surrounding-gate strained silicon nanowire FET sustains similar characteristics with the pure Si one.     

单相变压器供电的高压钠灯降压节电试验

城市道路照明负荷是单相负荷,将原三相变压器供电改由单相变压器供电,组成V／V0-V/V单相变压器-高压钠灯节电照明系统,降低了低压配网损耗,工程造价相对减少,提高了供电可靠性,同时可以达到下半夜路灯自动降压节电的节电效果。     

辛伐他汀的研究

辛伐他汀是洛伐他汀经半合成而得到的降胆固醇药。它是一种非活性的内酯化前体药物 ,通过肝脏水解成活性代谢产物或其衍生物而起作用 ,用于治疗高胆固醇血症。大量临床试验结果表明 ,辛伐他汀能够显著降低冠心病的发病率、死亡率 ,具有有效的调脂作用 ,副作用少 ,长期应用耐受性好 ,是最有效的降低LDL C药物之一。四川抗菌素工业研究所研制的辛伐他汀生产技术达到国际先进水平     

Obstacle avoidance tracking control with antiswing and tracking errors constraint for underactuated automated lifting robots with load hoisting/lowering

The existing automated lifting robot technology focuses merely on motion control and ignores the surrounding environment. In practice, obstacles inevitably exist in the movement path of the automated lifting robot, which affects construction safety. Furthermore, due to the underactuated characteristics of the automated lifting robot, the load can be difficult to control when it swings violently, which undoubtedly poses huge challenges to obstacle avoidance trajectory planning and controller design. In this paper, an obstacle avoidance trajectory and its tracking controller with antiswing and tracking errors constraint are proposed. To ensure accurate load positioning and effective obstacle avoidance, the proposed control method introduces a four-segment polynomial trajectory interpolation curve to construct an obstacle avoidance trajectory based on analyzing the geometric relationship between variables. To improve the transient coupling control performance of the system, combined with the passive analysis of the automated lifting robot system, this method constructs a potential function that limits the tracking error and a coupling signal that enhances the coupling relationship between the system variables. Barbalat's lemma and Lyapunov techniques are used to analyze the stability of the system. Simulation and experimental results show that the proposed control method can significantly suppress or even eliminate load oscillation, accurately locate the load, avoid obstacles, improve the safety and efficiency of the working automated lifting robot, and have strong robustness to changes in system parameters and the addition of external disturbances.     

变频调速器在溶铝炉上的应用

西方通过对连铸连轧熔铝炉的工况分析,主要介绍了变频调速器的熔炼过程中的节能应用,并开创了高粘度重油使用变频技术的先例,为铝加工生产节能降耗开辟了新途径。