高能气体压裂过程中CO气体浓度扩散规律

针对低渗透油气田在高能气体压裂增产措施中CO气体中毒事件,运用现场数据和数学模拟方法通过对CO气体流动、扩散等的综合研究,建立了CO井筒流动及大气扩散模型。同时,也考察了井筒压力、气油比、大气稳定度等主要因素对CO气体扩散的影响。通过现场实例计算,证实模型具有较高的准确性,对合理、有效地开发油气田及煤层气的开发具有重要的实际意义。     

浅谈如何更好地推行工程量清单计价规范

《建设工程工程量清单计价规范》的颁布实施,是工程建设领域的一件大事,为了更好的推行和施行计价规范,应做好多方面的工作。     

Degradation Behaviors of Metal-Induced Laterally Crystallized n-Type Polycrystalline Silicon Thin-Film Transistors Under DC Bias Stresses

Device degradation behaviors of typical-sized n-type metal-induced laterally crystallized polycrystalline silicon thin-film transistors were investigated in detail under two kinds of dc bias stresses: hot-carrier (HC) stress and self-heating (SH) stress. Under HC stress, device degradation is the consequence of HC induced defect generation locally at the drain side. Under a unified model that postulates, the establishment of a potential barrier at the drain side due to carrier transport near trap states, device degradation behavior such as asymmetric on current recovery and threshold voltage degradation can be understood. Under SH stress, a general degradation in subthreshold characteristic was observed. Device degradation is the consequence of deep state generation along the entire channel. Device degradation behaviors were compared in low V_d-stress and in high V_d-stress condition. Defect generation distribution along the channel appears to be different in two cases. In both cases of SH degradation, asymmetric on current recovery was observed. This observation, when in low V_d-stress condition, is tentatively explained by dehydrogenation (hydrogenation) effect at the drain (source) side during stress     

江西省都昌县2000年旱情的思考

通过都昌县2000年旱情及受灾情况的分析，揭示了产生这种现象的原因，并且提出了相应解决问题的对策。     

Total transfer capability computation for multi-area power systems

This paper presents a method for multi-area power system total transfer capability (TTC) computation. This computation takes into account the limits on the line flows, bus voltage magnitude, generator reactive power, voltage stability, as well as the loss of line contingencies. The multi-area TTC problem is solved by using a network decomposition approach based on REI-type network equivalents. Each area uses REI equivalents of external areas to compute its TTC via the continuation power flow (CPF). The choice and updating procedure for the continuation parameter employed by the CPF is implemented in a distributed but coordinated manner. The proposed method leads to potential gains in the computational efficiency with limited data exchanges between areas. The developed procedure is successfully applied to the three-area IEEE 118-bus test system. Numerical comparisons between the integrated and the proposed multi-area solutions are presented for validation.     

基于图像灰度统计分布的高炉温度场动态定标算法

通过高炉红外图像建立料面温度场是判断高炉煤气流分布形态的一种有效方法,温度定标是建立温度场的基本问题之一.在高炉复杂、恶劣的环境下,本文以高炉十字测温为基础,通过热电偶温度数据和图像对应区域的灰度分布统计,动态地建立温度定标关系.算法具有较好的自适应性,实际生产运行表明,温度定标关系较好地适应了高炉炉况的不确定性,准确地反映了高炉温度场的变化情况.     

思林水电站引水隧洞竖弯段开挖施工技术

思林水电站地下厂房引水发电系统共布置4条引水隧洞,隧洞典型开挖断面大、竖弯段部位地质条件复杂,施工期安全问题突出;特别是隧洞竖弯段异型部位施工质量要求高,超欠挖难以控制,加之工期紧,因而施工难度大。本文对思林水电站引水隧洞施工过程中如何确保隧洞竖弯段的开挖进度和质量,同时又确保施工安全作了较详细的介绍。     

氮化镓低维纳米结构的制备与表征

主要是以氧化镓为原料,通过气相沉积法,制备出GaN纳米线和纳米带.通过X-射线衍射（XRD）,扫面电镜（SEM）和高分辨透射电镜（HRTEM）等测试手段对其形貌进行了表征和分析.研究了实验过程中工艺条件的改变对所制备GaN纳米结构形貌特征的影响.对两种GaN纳米材料的拉曼散射光谱进行了分析.     

Structure and Magnetic Properties of LaCo_(13-X)M_X Intermetallic Compounds

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烷基化原料预加氢工艺应用分析

由于来自催化裂化装置的烷基化原料中所含有的丁二烯在烷基化反应中可生成重质油,使产品干点上升,辛烷值下降,并使酸耗增加.针对这种状况,齐鲁石化公司研究院和胜利炼油厂联合开发了QSH-01烷基化原料预加氢催化剂及其相应的工艺技术,来脱除原料中丁二烯.笔者对该工艺技术及其应用作了阐述,并对该技术的应用前景作出分析.