ECS-100 DCS在褐煤提质生产中的应用

简单介绍Web Field ECS-100系统特点及LCC技术的生产流程,重点分析控制系统的总体设计方案、系统配置以及在LCC装置中的应用情况。     

电网企业全寿命周期成本管理

电网资产具有初始投资大、运行成本高、服役时间长的特点。电网企业开展资产全寿命周期成本管理,可以解决传统管理模式中电网资产规划、设计建设、运营、退役各管理环节衔接问题,在电网安全运行的前提下,实现资产全寿命周期成本最低。电网资产的全寿命周期成本是企业的各个成本项目与管理关系的总成,以电网资产形成点为分界点,将企业总成本划分为基建成本、生产成本两个阶段,提出全寿命周期成本视角下的电网企业成本管理体系。     

DFC在我国汽车产品设计中的应用

描述面向成本设计（Design for cost）的概念以及我国汽车工业的现状,通过对汽车全生命周期的分析,阐述在我国汽车企业中实施面向成本设计的必要性.介绍在汽车设计阶段所需要的成本估算方法,并提出基于CAD/CAPP模型的汽车成本估算框架体系,这将有助于提高我国自主品牌汽车的市场竞争力.     

恒频移相LCC谐振变换器的设计

采用交流法对移相式LCC谐振变换器进行了稳态分析，用MATLAB软件绘制了电压转换比M与ωs／ωr、Cp／Cs品质因数Q及移相角θ之间的关系曲线，并利用PSIM软件对变换器进行了仿真。仿真和实验结果表明，开关器件零电压开通，可减少开关损耗，有利于提高效率。     

近30年中国东部气温对土地覆被变化的敏感性

利用1979?2010年中国东部295个气象站点近30年逐年各月的月平均气温数据, 分析气象站站点周围3 km土地覆被变化和相应气温变化, 研究中国东部地表土地覆被变化对站点气温变化的影响。结果表明: 近30年研究区域内草地锐减, 城市剧烈扩张, 林地显著增加; 站点气温年平均变化率在-0.2~0.9℃/10a之间, 区域气温年平均变化率为0.38℃/10a; 不同土地覆被上的气象站点气温变化率明显不同, 按城市、农田、草地、林地的顺序依次减小; 区域气温变化是多种覆被共同作用的结果; 土地覆被变化并非局地气温上升的唯一原因, 却深刻地影响着局地年气温变化率。     

Partial melting of the dry mafic continental crust: Implications for petrogenesis of C-type adakites

C-type adakites have been commonly considered as a result of partial melting of the mafic lower continental crust (LCC) at high pressure, as supported by high P-T experiments on hydrous basalts. However, because the mafic eclogitic LCC is generally dry, experiments on water-bearing materials cannot be used to constrain the melting processes of the dry mafic LCC. Due to the lack of systematic melting experimental studies on dry mafic rocks at crustal pressures, MELTs software was applied to simulating melting of the dry mafic LCC at 1–2 GPa. Comparison of model results with experimental data indicates that, when melting degree is greater than 20%, melts from the dry mafic LCC at 1–3 GPa cannot produce the C-type adakitic melt with high SiO₂ content (~70%). Although the limited experimental results about dry mafic rock melting at 1–2 GPa in the literature suggest that low degree melting (<10%) cannot produce silicic melt either, MELTs software simulation shows that, at pressure >1.8 GPa, low-degree melting can produce dacitic melt with high K₂O/Na₂O (~1) if SiO₂ content of the melt is controlled by residual garnet. Furthermore, the simulation also suggests that, if pressure is <1.8 GPa, abundant plagioclase (plg) in the residual phase may decrease SiO₂ content in the melt to below 62%, much lower than that of the C-type adakites observed in eastern China. Given the high P-T conditions required to produce melts with high SiO₂ and extremely low HREE contents, such melts could easily be contaminated by other crustal-derived melts, implying that the C-type adakites from eclogite melting could be less commonly observed in the outcrops than previously believed. Besides the interpretation that garnet fractionates Sr, Y, and REE, high Sr/Y and La/Yb could be also produced by multiple ways such as inheriting the source features and fractional crystallizing clinopyroxene (cpx). Therefore, it may be problematic using high Sr/Y and La/Yb as criteria to identify adakites. Instead, REE patterns with strong depletion of HREE relative to MREE (e.g. high Gd/Yb) could be a better parameter to identify the role of garnet and thus adakites. Finally, geochemical models based on MELTs simulation indicate that Eu anomaly cannot be simply used to constrain the role of plg in magmatism because Eu anomaly in the melt is a function of source characteristics, oxygen fugacity (fO₂) of magmatic systems, and plg/mafic minerals mode ratio.     

一种基于LCC算法的新型RS码译码器

相比于传统的硬判决译码算法,RS码软判决译码算法能够获得更大的编码增益,但硬件实现较为复杂. 针对这一问题,本文在LCC软判决译码算法的基础上提出了一种改进型校验子算法,可在不影响译码性能的前提下大幅降低硬件复杂度. 仿真结果表明,本文设计的RS(255, 239)码η=3译码器,在BPSK调制下通过AWGN信道,相比于现有基于校验子的RS码译码器结构,硬件资源消耗减少20%. 采用SMIC 0.18 μm CMOS工艺实现,芯片面积仅为0.81 mm2.      

The Optimum Replacement of Weapon

The theory of LCC (Life Cycle Cost) is applied in this paper. The relation between the economic life of weapon and the optimum replacement is analyzed. The method to define the optimum replacement time of weapon is discussed.     

基于小波神经网络的装备寿命周期费用估算方法

首先简要介绍了寿命周期费用概念以及进行寿命周期费用估算的意义。其次分析了常用估算方法的优缺点,再次通过介绍小波及小波变换的原理和方法,建立了适用于武器装备研制费用的小波神经网络结构.结合某型装备研制费用,进行了数据仿真。仿真结果表明本文方法是可行的。     

基于Google地图 API的典型供电模型实用化配置研究

为提高配电网络的供电可靠性以及转供能力,结合福建地区的地域以及负荷分布特性,在已有供电模型研究的基础上,提出多链式、多三角形以及含链式和三角形的链式群综合供电模型,在谷歌地图API导入地图的基础上生成可视化的供电架构,构建相应的供电模型,分别基于线路容量最大利用率Ωmax分析、面向全寿命周期成本(LCC)的二进制离散粒子群以及Banyan网络构成理念等方法对供电模型进行实用化优化配置研究.实例测试以及现场应用表明,本文的研究及软件的开发应用为配电网的规划提供了科学、合理、可靠的手段和依据.