微透水岩体单孔抽水试验渗透系数的分析——以西非某水电站为例

抽水试验成本较高,耗时长,而单孔抽水试验获取的试验数据有限,且紊流、井损等因素对水位影响较大,从而影响参数计算精度;同时,实际抽水试验常在多种复杂边界条件下进行,如试验孔有临河时,需结合多种含水层模型,使实际抽水试验条件尽可能与理论模型条件相近,选择合适的模型计算,相互比较验证,求取岩土体渗透系数;将计算成果与有其他水文地质试验结果比较,综合确定渗透系数,进一步提高了岩土体渗透系数的合理性。     

双标倒垂孔的施工与控制

介绍了目前比较成功的倒垂孔钻孔、钻孔偏斜、保护管安装、双金属标的埋设及安装等施工方法和控制措施。     

高炉水渣系统转鼓控制的应用

分析了转鼓速度与转鼓转矩、转鼓内液位间的关系,建立了相关量间的数学模型,利用渣曲线的分段函数和转鼓内液位与转鼓转速的分段函数的合成来控制转鼓.针对控制系统对控制器参数的依赖,提出了经典开环、PID控制策略,并对控制方式进行了比较分析,得出了“应根据不同的现场情况灵活处理,才能达到最佳的控制效果”的结论.     

对一种新型供热收费模式的探讨

在总结现有供热收费模式特点的基础上提出了一种新型的供热收费模式--三部制收费模式,给出了三部制收费模式的计算方法.     

高炉喷煤用烟气炉的优化设计

为解决现有烟气炉燃烧不充分、炉膛蓄热能力差、出口烟气混合不均匀以及烟气混合段容易发红变形等问题,从燃烧器设计、内衬砌筑以及混合室结构进行了一系列优化,通过改进有效提高了烟气炉的热效率以及烟气系统的稳定性。     

Optimal allocation for electric vehicle charging stations using Trip Success Ratio

This paper proposes a new model for optimally allocating Plug–in Electric Vehicle (PEV) Charging Stations (CSs) in the network. The model considers Trip Success Ratio (TSR) in order to enhance CS accessibility for PEV drivers. Diversity of usage and different driving habits are considered in the presented model, as well as different trip types (In-city, Highway). The allocation model has two stages: modeling TSR to estimate Charging Station Service Range (CSSR), and the CS allocation stage. In the first stage, the service range of charging stations has been estimated using TSR with consideration of the uncertainty of trip distances (In-city, Highway) and the uncertainty in the Remaining Electric Range (RER) of PEVs. The estimated CSSR is utilized in the CS allocation stage in order to optimize the CS location set that covers the network with a certain guaranteed TSR level. The allocation problem has been formulated as the Maximum Covering Location Problem (MCLP) in order to make the optimal decision for allocating CSs in the network.     

河钢邯钢7号高炉近年高炉技术进步

河钢邯钢7#高炉,现有效容积2 000 m3。高炉克服设备缺陷大,高炉强化水平受到限制等因素,针对七高炉自身特点,我们通过解放思想、开拓思路,要求公司形成铁前以高炉为中心的理念,提高外围保障能力。并逐步加强了高炉的操作与管理的标准化、制度化推进,进一步优化上下部调剂,自2008年7月第二代炉役开炉以来,炉况保持长期稳定顺行,各项指标稳定在较好水平,炉况在外界条件变化时维持稳定局面,条件向好具备顺行局面的基础上采取积极争取指标措施,取得一定的技术进步,良好效果,尤其2011年以来利用系数2.5以上,实现了高炉长周期的稳定顺行。     

���ڹ��˹�դ�ĸ�¯��ȴ����̬ʵ���е�������

基于高炉冷却壁光纤光栅热态实验的基本原理,分析了光纤光栅传感器在高炉冷却壁在线监测中的优势。对高炉冷却壁以光纤光栅为传感器的热态实验进行了系统误差分析,并探讨了系统误差产生的可能原因。通过实验数据分析,得到冷却壁表面温度和热应力与以光纤光栅传感器输出的波长之间的关系。对热态实验数据进行误差和不确定度的分析,从而确定数据的可靠性,为实验数据的修正和准确性判断提供了依据。     

Distribution network planning integrating charging stations of electric vehicle with V2G

Accompanied by the popularization of EVs, the planning of electric vehicle (EV) charging stations becomes an important concern of distribution network planning. In this paper, the load density method is introduced to determine the optimal capacity of the EV charging stations in the areas to be planned, and the difference between 1 and the weight coefficients obtained by the analytic hierarchy process (AHP) method is used to calculate the cost coefficients of the charging station. The objective function of the optimal distribution network planning model should be the minimal cost of the fixed investments, the operational costs and the maintenance costs including the substations, charging stations and feeders. In this model, the effect of vehicle-to-grid (V2G) is considered, i.e., the EV is respectively treated as both the load and the source. Moreover, the electricity price volatility has been taken into consideration. In this case, EV owners can be guided to charge and discharge EV orderly. The ordinal optimization approach is applied to get the best solution. The results of the case study based on IEEE 54 nodes model show the feasibility and effectiveness of the proposed model.     

VENTEC深孔钻系统在C620上的成功应用

论述了英国哈镘公司(HAMMOND)生产的HD3000型VENTEC深孔钻系统在C620上的成功应用经验,对VENTEC深孔钻系统的构成、工作原理、在车床上的安装以及系统在使用过程中易产生的各类故障等问题进行了分析总结和详细论述。