An improved LP model for energy optimization of the integrated iron and steel plant with a cogeneration system in China

In an integrated iron and steel plant with a cogeneration system, recycled energy is continuously transported into the cogeneration system and the electricity is continuously generated, and both of them could not be stored for a long time. Moreover, the generation and consumption of electricity is irregular, which may bring about more unexpected imbalances. Therefore, it is a crucial issue to schedule the entire energy system by optimizing the operation of energy utilization, which includes the raw energy in the production system, the generation electricity in the cogeneration system and the recycled energy in these two systems. In this paper, an improved Linear Programming model for energy optimization in the integrated iron and steel plant with a cogeneration system is established. The improved model focuses on controlling the whole energy flow and scheduling the whole energy consumption in the entire energy system between the production system and cogeneration system through optimizing all kinds of energy distribution and utilization in an integrated iron and steel plant with a cogeneration system. Case study shows that the improved model offers the optimal operation conditions at the higher energy utilization, lower energy cost and lower pollution emissions.     

论加强协商民主的制度化与实效性

随着我国改革进入深水区,利益多元化、社会矛盾愈加凸显了协商民主的重要性.但协商民主理论还不完善,需要用制度化来规范和保证,作为协商民主的主渠道——人民政协发展与协商民主的步调还不相适应.这就要求我们在实践中积极探求制度化,在协商民主实践中找准角色定位,避免形式主义,积极发挥人民政协作用,不断推进社会主义协商民主发展.     

网关控制器BootLoader系统设计

为实现某款车用网关控制器的实车应用程序更新功能、方便实车调试,设计了基于CAN总线的BootLoader系统.介绍了BootLoader系统实现的基本思路及具体实现方式,详细分析了以飞思卡尔控制器XET256为平台的存储空间分配、地址表示方式、存储空间擦除与写入方法.基于以CAN标准协议为基础的简单自定义命令和S19文件协议,实现了BootLoader与上位机之间信息的交互.试验结果表明,该BootLoader系统能够正确实现应用程序的更新及引导应用程序的执行,提高了网关控制器实车调试效率.     

Dendrite growth and micromechanical properties of rapidly solidified ternary Ni-Fe-Ti alloy

The rapid solidification of undercooled liquid Ni_(45)Fe_(40)Ti_(15)alloy was realized by glass fluxing technique.The microstructure of this alloy consists of primaryγ-(Fe,Ni)phase and a small amount of interdendritic pseudobinary eutectic.The primaryγ-(Fe,Ni)phase transferred from coarse dendrite to fragmented dendrite and the lamellar eutectic became fractured with the increase of undercooling.The growth velocity ofγ-(Fe,Ni)dendrite increased following a power relation with the rise of undercooling.The addition of solute Ti suppressed the rapid growth ofγ-(Fe,Ni)dendrite,as compared with the calculation results of Fe-Ni alloy based on LKT model.The microhardness values of the alloy and the primaryγ-(Fe,Ni)phase increased by 1.5 times owing to the microstructural refinement caused by the rapid dendrite growth.The difference was enlarged as undercooling increases,resulting from the enhanced hardening effects on the alloy from the increased grain boundaries and the second phase.     

（1-uv）-CONSTACYCLIC CODES OVER Fp＋uFp＋vFp＋uvFp

Constacyclic codes are an important class of linear codes in coding theory.Many optimal linear codes are directly derived from constacyclic codes.In this paper,（1 — uv）-constacyclic codes over the local ring Fp ＋ uFp ＋ vFp ＋ uvFp are studied.It is proved that the image of a（1 — uv）-constacyclic code of length n over Fp ＋ uFp ＋ vFp ＋ uvFp under a Gray map is a distance invariant quasi-cyclic code of index p2 and length p3n over Fp.Several examples of optimal linear codes over Fp from（1 — uv）-constacyclic codes over Fp ＋ uFp ＋ vFp ＋ uvFp are given.     

本科院校外语实验技术队伍调查分析

随机选取国内60个本科院校,调研了外语实验技术队伍的数量和结构,队伍的管理,工作与收入,学习与科研等。同时也初步调查了实验技术设备的现状,以及实验室常规工作中存在的问题。根据调查数据,指出了队伍中比较突出的一些现状问题。     

Acylation of nitriles to β-ketonitriles catalyzed by a heterometallic alkoxide cluster of neodymium and sodium： NdNa8（O^tBu）10（OH）

Catalytic acylation of nitriles with esters in the presence of 10 mol% NdNa8(OtBu)10(OH) is developed.The procedure is suitable for both enolizable and nonenolizable esters and affords β-ketonitriles in moderate to high yields.The heterometallic alkoxide cluster NdNa8(OtBu)10(OH) is structurally characterized by X-ray diffraction,and a mechanism for the production of β-ketonitriles using the cluster is proposed and verified.     

基于卫星产品保证的并行工程的研究

针对在产品保证基础上实施并行工程，简述了卫星研制串行工程和并行工程之间的概念和关系，并通过建立在卫星研制过程中无产品保证要求和有产品保证要求两种条件下串行工程和并行工程的模型，从质量、成本、效率等方面来比较、分析和刻画卫星研制过程中实施并行工程的思想和作用；在此基础上分析了在实际中实施并行工程的条件。     

文学张力:形成机制的探寻

文学张力的形成机制是重复与对比机制。对比,意味着变化和差异,导致审美空间的扩展,是两极的强化扩张;重复,意味着回旋与复归,导致有机整体的凝聚,是两极的强化聚合。二者又都遵循渐进发展的强度控制原则。     

Simultaneous mineralization of CO2 and recovery of soluble potassium using earth-abundant potassium feldspar

CO2 capture and storage(CCS) is an important strategy in combatting anthropogenic climate change.However,commercial application of the CCS technique is currently hampered by its high energy expenditure and costs.To overcome this issue,CO2 capture and utilization(CCU) is a promising CO2 disposal method.We,for the first time,developed a promising method to mineralize CO2 using earth-abundant potassium feldspar in order to effectively reduce CO2 emissions.Our experiments demonstrate that,after adding calcium chloride hexahydrate as an additive,the K-feldspar can be transformed to Ca-silicates at 800 C,which can easily mineralize CO2 to form stable calcium carbonate and recover soluble potassium.The conversion of this process reached 84.7%.With further study,the pretreatment temperature can be reduced to 250 C using hydrothermal method by adding the solution of triethanolamine(TEA).The highest conversion can be reached 40.1%.The process of simultaneous mineralization of CO2 and recovery of soluble potassium can be easily implemented in practice and may provide an economically feasible way to tackle global anthropogenic climate change.