MOF-74 building unit has a direct impact on toxic gas adsorption

Metal organic framework (MOF-74) analogs have been synthesized using cobalt, magnesium, nickel, and zinc metal centers. The capability of these materials to remove ammonia, cyanogen chloride, and sulfur dioxide from air has been evaluated via fixed-bed breakthrough testing in both dry and humid conditions. Octane breakthrough tests were performed to determine the physisorption capacities of the materials. All materials were stored in air prior to use. Dynamic breakthrough capacities of the analogs were compared to 13X zeolite and BPL activated carbon. The impact of the metal center on the adsorption behavior is illustrated with each analog providing different ammonia and cyanogen chloride adsorption capacities. The results provide an important step in the assessment of the potential of MOFs to function as porous adsorbent materials.     

Multi-Objective Optimization of Indigo Carmine Removal by an Electrocoagulation/GAC Coupling Process in a Batch Reactor

A coupling process between Electrocoagulation (EC) and GAC was employed to separate dyes from aqueous solutions. The removal of an indigoid dye, namely C.I. Acid Blue 74, was tested. A novel approach for optimizing EC-based techniques is presented. In addition to maximizing removal efficiency, minimizing consumptions of energy and electrode materials were also targeted by means of multi-objective optimization in order to reduce the specific costs. A very good cost-efficiency feature of EC/GAC coupling process operated under optimal conditions to treat wastewater from dyestuff has been revealed. The independent variables considered were the current density, influent pH, contact time, granular activated carbon dose, and initial dye concentration. Simple maximization of color removal efficiency and multi-objective optimization were compared. Two different constraints were considered for each type of optimization. The determined costs outline the cheapness feature of the EC/GAC system as a potential dye wastewater treatment technology.     

The influence of dislocation distribution density on curvature and interface stress in epitaxial thin films on a flexible substrate

We consider the problem of relaxation of coherency stresses by lattice misfit dislocations, which can be represented as edge dislocations uniformly distributed along the interface, and can be associated with the concept of dislocation density according to the mathematical theory of continuous distributions of dislocations. The orientation of dislocation line density is constrained within the plane of epitaxial layer and the Burgers vector density within the same plane is considered as a local variable of the problem. Under the external stress-free conditions the system is then enforced to satisfy the boundary conditions according to the geometry of the epitaxial film and the substrate together with the corresponding compatibility conditions. The dislocation density tensor is then connected with the deformation and rotation tensors and subsequently with the curvature of the system. The closed form solution of the problem is given for a generic one-dimensional case.     

基于AT89S52的32路沙阻相位差检测系统

传统的相位差测量需要采用多片中小规模集成电路,不仅电路复杂,而且测量相位差的精度不高,在实际应用中存在着许多不足之处,本文结合沙阻测湿实际工程,介绍了利用廉价、使用方便的单片机AT89S52来检测32路沙阻相位差系统,给出了该测量系统的接口电路,其主要由信号发生电路、32路沙阻选择电路,相位差检测电路和液晶显示模块电路四大部分组成,并阐述了其实现原理,给出了其Protues仿真数据和实际的测试数据,为后续工程提供相位参数。     

The problem of windfarm location: A social multi-criteria evaluation framework

Although wind energy has the green image, the location of windfarms is always a source of local conflicts. Opposition may depend on the extensive land use of windfarms, their possible impacts on tourism or their visual impact, as well as NIMBY (Never In My Back-Yard) behavior. On the other hand, some social actors are normally in favor of wind parks because they perceive them as a possibility of development or simply a source of income. In these situations, the management of the energy policy process involves many layers and kinds of decisions, and requires the construction of a dialogue process among many social actors, individual and collective, formal and informal, local and non-local. This implies that the political and social framework must find a place in evaluation exercises. This is the objective of social multi-criteria evaluation (SMCE). In this article, SMCE is proposed as a general framework for dealing with the problem of wind park location. The major strength of SMCE is the possibility of integrating both socio-economic and technical dimensions inside a coherent framework. A real-world case study is used as an illustrative example.     

VPX和ATCA机箱管理关系及异同

通过深入研究基于多协议交换总线（ Verstatile Protocol Switch Bus, VPX）机箱管理和高级通信计算架构（ Advanced Telecom Computing Architecture, ATCA）系统机箱管理规范,结合开发VPX和ATCA机箱管理的经验,总结和提炼出二者机箱管理的异同,以利于读者在学习和开发VPX机箱管理应用时,能够对VPX机箱管理有一个迅速的认识和理解,并能够充分借鉴和利用ATCA机箱管理开发的经验和成果。对比分析结果表明, VPX机箱管理是在ATCA机箱管理的基础上派生和发展而来。     

Coarsening of Boundary-element Spaces

In this paper, we will present composite boundary elements (CBE) for classical Fredholm boundary integral equations. These new boundary elements allow the low-dimensional discretisation of boundary integral equations where the minimal number of degrees of freedom is independent of the, possibly, huge number of charts which are necessary to describe a complicated surface. The applications are threefold: (a) The coarse-grid discretisation by composite boundary elements allow the use of multigrid algorithms for solving the fine-grid discretisation independently of the number of patches which are necessary to describe the surface. (b) If the accuracy requirements are moderate, the composite boundary elements allow the low-dimensional discretisation of the integral equation. (c) A posteriori error indicators can be applied already to a low-dimensional discretisation, which do not resolve the domain, to obtain a problem-adapted discretisation.     

FSK制式来电显示的几种解码方式比较

主要探讨基于FSK制式的主叫号码来电显示的几种解码方式,详细介绍专用电路解调、锁相环解调和数字信号处理器(DSP)软件解调的识别方式,给出相应理论依据和实验数据,最后分析各种解码方式的优缺点.     

桩西特低渗油田注水水质软化处理工艺

胜利桩西油田桩 74块油藏高温、高压、低渗 ,回注污水钙镁含量高 ,引起地层严重结垢 ,因此桩 74站采用了苛性钠软化回注污水工艺。讨论了NaOH软化水的原理。主要考虑NaOH与Ca(HCO3 ) 2 的沉淀反应 ,确定了NaOH加量以及中和需要的盐酸加量。在矿化度 984 8mg/L、含钙 2 84mg/L、含镁 2mg/L的桩 74站污水中加入4 70mg/L的NaOH ,30mg/L的助沉剂 ,使钙镁含量降至 16 .6mg/L ,pH值由 7.0升至 12 .0。污水在 pH =7.0、钙镁含量≤ 15 0mg/L及 pH =80、钙镁含量 <10 0mg/L时 ,175℃ (地层最高温度 )下的结垢率很低。软化并中和后的污水腐蚀率比原水略有增大 ,且随 pH值升高 (5 .5～ 9.5 )而增大。该污水软化工艺已在装备有三级精细过滤装置的桩 74站投入应用 ,前 3个月回注污水的 pH值为 5 .5～ 8.5 ,钙镁含量为 4 .1～ 4 0 .1mg/L ,含油量为 0～ 3.6mg/L ,悬浮物含量为 1.0～ 2 .0mg/L。图 1表 4参 1。