M—H2O系中溶液态物质的优势区域图

Ｍ－Ｈ２Ｏ系中各溶液态物质在电势－ＰＨ平面内的优势区是Ｐｏｕｒｂａｉｘ图的一个重要内容。各物质的优势区大小由溶液态各物质的活性元素（Ｍ）的总浓度Ｔ（Ｍ）决定;只有当各物质均含有相同数目的活性元素（Ｍ）时,它们各自的优势区大小才与无关。Ｔ（Ｍ）一定时,Ｅ－ＰＨ平面内各点（ＰＨ,Ｅ）所对应的各物质的浓度可用改进的“二分法”求出。求出了Ｃｕ－Ｈ２Ｏ系及不同总浓度Ｔ（Ｓ）和Ｔ（Ｃｒ）时简化的Ｓ－Ｈ２Ｏ系和     

M-H_2O系中溶液态物质的优势区域图

M -H2 O系中各溶液态物质在电势 pH平面内的优势区是Pourbaix图的一个重要内容。各物质的优势区大小由溶液态各物质的活性元素 (M)的总浓度T(M)决定 ;只有当各物质均含有相同数目的活性元素 (M)时 ,它们各自的优势区大小才与总浓度T(M)无关。T(M)一定时 ,E -pH平面内各点 (pH ,E)所对应的各物质的浓度可用改进的“二分法”求出。求出了Cu -H2 O系及不同总浓度T(S)和T(Cr)时简化的S -H2 O系和Cr-H2 O系各自的优势区域图。结果表明 ,随着T (S)的增加 ,S -H2 O系中较高级多硫化物的优势区增大 ,且移向低电势区 ;Cr -H2 O系中随T(Cr)的改变而变化最明显的是Cr3 ,Cr(OH) 3,Cr(OH) -4 ,和Cr3(OH) 5 4的优势区。     

关于最小广播图研究

广播是网络上信息的传播过程。在这个过程中一个结点将信息传给所有其他的结点。本文确定Ｂ（１９）的值。另外还给出Ｂ（２－＾ｋ－ｊ），ｊ＝１，２，３，４的下界，并确定Ｂ（２＾５－１）和Ｂ（２＾５－２）的值。     

MeX—Me‘X2系熔盐相图中间相平衡液相线的计算机预报

应用原子参数－人工神经网络方法，预测ＭｅＸ－Ｍｅ’Ｘ２型熔盐系相图中与ＭｅＭｅ’Ｘ３或Ｍｅ２Ｍｅ’Ｘ４两种中间化合物固相成平衡时的液相线，结果与实测值颇符合。     

具有同一交工期和指数加工时间的单机随机调度

本文研究具有同一交工期和指数加工时间，目标函数是期望的未完工费用的单机随机调度问题，即ｌ１Ｘｊ－ｅｘｐ（λｊ）ｄ１Ｅ（ΣＩＣｊ）工件的最优排序是按ＩＣｊλｉ非升的排序，得到了排序可交换及未完工费用的等价性附加结果。     

技嘉GA-6CX主板性能测试

最近,我们得到了一块必须使用 ＲＤＲＡＭ的８２０主板技嘉ＧＡ－６ＣＸ,技嘉ＧＡ－６ＣＸ赢得英国ＰＣ Ｐｌｕｓ四月号杂志“最佳效能”的奖项。这块主板在我们的测试中,几乎是以一面倒的优势,超越其使用ＳＯＲＡＭ的双胞胎兄弟ＧＡ－６ＣＸＣ,及使用４４０ＢＸ芯片组的华硕Ｐ３Ｂ－Ｆ。ＣＡ－６ＣＸ的超频能力也相当惊人,与华硕的Ｐ３Ｃ－ＬＳ不相上下。 技嘉ＧＡ－６ＣＸ主机板和另一款ＧＡ－６ＣＸＣ主机板都是使用英特尔８２０芯片组。两者唯一的不同是,ＧＡ－６ＣＸ必须搭配ＲＤＲＡＭ使用,而ＧＡ－６ＣＸＣ多了一颗８２８０…     

钴,镍萃取平衡数学模型及串级萃取过程最优化计算

本文把ＣｏＣｌ２－ＮｉＣｌ２－Ｈ２Ｏ－Ｒ３Ｒ’ＮＣｌ萃取平衡体系的实验数据关联为数学模型，对萃取过程进行串级模拟和最优化计算，并在日处理０．９Ｍ＾３料液的生产性试验中得到验证。计算得到的主要工艺参数，两相出口的主要指标，各组分浓度及分配比的逐级分布都与试验结果基本相符。     

基于ＳＱＬ的ＸＭＬ查询的有效实现

讨论了关系数据库中利用ＳＱＬ语句实现ＸＭＬ查询的问题,首先提出了一个利用映射信息（映射图）将带正则路径表达式的ＸＭＬ查询重写为一组简单路径查询的算法,该过程中的一个关键问题的Ｋleene表达式不能直接利用映射图重写,为此,提出了利用路径实例的统计信息来扩展Ｋleene表达式的算法,然后,进一步描述了将简单路径表达式查询重写为ＳＱＬ查询的方法,这些算法在ＸＭＬ－关系系统原型ＶＸＭＬＲ中实现,初步性能研究表明提出了方法是有效的。     

身份证号码从15位快速转变为18位的算法

目前使用的身份证号码是１５位：ＸＸＸＸＸＸ－ＹＹ—ＭＭ—ＤＤ－ＸＸＸ,其中的ＹＹ是持证人的出生年份的后两位,例如１９６８年出生,则ＹＹ＝６８,ＭＭ是出生月份,从１到１２,ＤＤ是出生的日期,从１到３１。改成的１８位是：ＸＸＸＸＸＸ－ＹＹＹＹ－ＭＭ—ＤＤ－ＸＸＸ—Ｚ,是将ＹＹ改为ＹＹＹＹ,即表示“公元”的前两位也保留,例如１９６８年出生,则ＹＹＹＹ＝１９６８,Ｘ升位前后都不变,另末尾再加一位校验位Ｚ,对该让我们不做讨论。但是,如果是手工来做修改,效率将十分低。本文结合数据库本身的函数和命令,可以让计…     

西蒙MT-RJ新型光纤连接头

西蒙公司的全线ＭＴ－ＲＪ产品是一种提供通用 和高性能的光纤连接的设备。西蒙的ＭＴ－ＲＪ连接头把光纤的所有优势压缩在一个只有ＳＣ连接头三分之一大小的双工连接头内，现场端接快速方便，使用经证明的无环氧／无需磨光法，只需２分钟，平均每芯光纤小于１分钟。 这种产品提供广泛的ＭＴ－ＲＪ产品种类解决方案，西蒙ＭＴ－ＲＪ工作区适配器产品与西蒙公司现有的ＭＡＸ、ＣＴ、ＳＭ盒及ＦＯＢ系列光纤产品兼容，可以在一个面板或连接盒内同时安装铜缆和光纤。在电信间，西蒙ＭＴ－ＲＪ快速压入式适配器小板可装入西蒙ＲＩＣ，ＳＷＩＣ２…     

Thermodynamic assessment and database for the Cu–Fe–O–S system

The previously obtained thermodynamic databases for the Cu–Fe–S, Cu–Fe–O, Fe–O–S and Cu–O–S ternary systems have been combined and used to predict thermodynamic equilibria in the quaternary Cu–Fe–O–S system. The available experimental data were compared with model predictions. Minor modifications of model parameters were required to better describe the experimental points in the quaternary system; the effect of these changes was verified in the ternary subsystems. The procedure was developed to calculate the isothermal sections of the phase diagram of the quaternary system inside the tetrahedron. The liquid phase over the whole composition range from metallic liquid to sulfide melt to oxide melt has been described by a single model developed within the framework of the quasichemical formalism. The obtained self-consistent set of model parameters can be used as a basis for the development of a thermodynamic database for simulation of copper smelting and converting.     

Predictions on the solubility and equiscale line of water content for the quaternary system (Li+Na+Cl+SO4+H2O) at 298.15 K

Pitzer ion-interaction theory is widely used to calculate the solubilities of salt–water systems. In the paper, the solubilities and equiscale lines of water contents of the reciprocal quaternary system (Li+Na+Cl+SO₄+H₂O) at 298.15 K were calculated using Pitzer theory and Harvie, Møller, Weare solubility modeling approach (HMW model). In this predictive calculation, the quasi-Newton and dichotomy methods were used to solve the system of simultaneous equations of the equilibrium expressions among solid and liquid phases, and to obtain the ionic molalities, Jänecke indices of phase diagram and the Jänecke indices of the equiscale lines of water contents in the reciprocal quaternary system. Based on the Jänecke indices, the dry-salt phase diagram and the equiscale lines of water-phase diagram were plotted. The predictive phase diagram via the theoretical calculation agrees well with the experimental phase diagram except for the phase region of double salt 2 (Li₂SO₄·Na₂SO₄, Db2). Distributions of equiscale lines of water-phase diagram on the dry-salt diagram of the reciprocal quaternary system reflect that phase areas of double salts of Db1 and Db2 bear maximal water contents. The predictive phase diagram and equiscale lines of water-phase diagram are often necessary in the technological design of chemical engineering for the utilization of inorganic salts in salt lake brines.     

矿物与岩石的可见-近红外光谱特性综述

矿物和岩石的系统光谱学研究是当今高光谱遥感发展的基础。在简要介绍了吸收光谱产生的电子过程和振动过程机理后,系统归纳了主要矿物类型和岩石类型的可见-近红外光谱特征。认为矿物的吸收光谱主要由二价、三价铁离子和过渡族元素的电子跃迁以及晶体场效应等电子过程产生;此外,还可以由水分子、Al-OH、Mg-OH、碳酸根的振动过程及卤化物的色心和硫化物的导带产生;岩石的吸收光谱都是杂质、包体、蚀变及替代成分产生的,主要为铁、水和羟基、碳酸根、硼酸根的光谱。最后指出,不同物理、化学环境下的矿物光谱特征变异研究在将来的高光谱遥感地质勘察中将变的更为重要。     

高选择性氢气和液化气元件的研制

作者以共沉淀法制备的γ－Fe2O3为气敏基料,通过多种金属氧化物的掺杂,研究了杂质的离子半径、元件电负性对元件氢气灵敏度的影响,并定量地研究了Ag2O掺杂特性,通过其掺杂修饰和用掺有PtO的Al2O3表面涂层修饰,研制出了高选择性氢气和液化气敏感元件。     

元胞自动机交通流NS模型相图研究

基于开放边界条件下元胞自动机交通流NS模型,模拟入口概率[α]、出口概率[β]、车辆最大速度[Vmax]以及随机慢化概率[ρ]对系统流量[J]的影响,根据不同流相中流量[J]的变化规律,建立NS模型的相图。结果表明,车辆最大速度在一定范围内的增加能提高系统流量,车辆的随机慢化概率在小于临界随机慢化概率[ρc]时,不会对系统流量造成影响,而超过[ρc]时,随机慢化概率越大,对系统流量的反作用越明显。[Vmax]和[ρ]决定系统相图。当[Vmax=5],[ρ<ρc]时,系统相图只由自由流相和堵塞流相构成,自由流相和堵塞流相被一条曲线分开;[ρ>ρc]时,最大流相出现,最大流相区域随着[ρ]增大而增加。     

The equilibrium phase diagram of the pentaerythritol-pentaglycerine-2-amino-2methyl-1,3, propanediol (PE-PG-AMPL) system

Polyalcohols and amines have been considered as potential thermal energy storage materials, owing to their energetic solid-solid phase transitions. In this paper, we present equilibrium phase diagram of Pentaerythritol (PE)–Pentaglycerine (PG)– 2-amino-2methyl-1,3, propanediol (AMPL) ternary system that has been thermodynamically assessed using the CALPHAD method. A special class of, so called, “Plastic Crystals” have tetrahederally configured molecules with O–H⋯O or N–H⋯O layered or chained bonds in the low temperature phase, and store latent heat of transformation during solid-solid phase change in orientationally disordered crystals at higher temperatures. For example, in polyalcohols, there are O–H⋯O bond rotations around the C–C bonds that are responsible for storing large amounts of solid state phase change energy. Several binary equilibrium phase diagrams of polyalcohols, amines and combination thereof have been calculated and experimentally validated. We only know of three ternary phase diagram of these plastic crystals reported, to the best of knowledge. In the thermodynamic calculations of thePE-PG-AMPL system, we used the binary phase diagram experimental data for the optimization and calculation of excess energies. The binary systems have been optimized using regular and sub-regular solution models. The binaries as well as the ternary system have been calculated from room temperature to the liquid phase. The solution phases are modeled as substitutional solutions, in which the excess Gibbs energies are expressed by the Redlich–Kister–Muggianu polynomial. There is a very good agreement between previously reported experimental data and the calculated phase diagrams.     

Dynamic polar diagram

The polar diagram [C.I. Grima, A. Márquez, L. Ortega, A new 2D tessellation for angle problems: The polar diagram, Computational Geometry 34 (2006) 58-74] of a set of points on the plane and the contracted dual of polar diagram (CDPD) [B. Sadeghi Bigham, A. Mohades, The dual of polar diagrams and its extraction, in: International Conference of Computational Methods in Sciences and Engineering ICCMSE, vol. 7, Greece, 2006, pp. 451-454] have been introduced recently. In this paper, we introduce the Dynamic Polar Diagram and present an algorithm to find it using CDPD and a hash structure for point location problem. In the dynamic polar diagram, the points can be added to or removed from the point set. For this problem, a brute-force method runs in O(nlogn) time and also there is a sketch of an algorithm in [C.I. Grima, A. Márquez, L. Ortega, A new 2D tessellation for angle problems: The polar diagram, Computational Geometry 34 (2006) 58-74] that takes O(n) time in all cases (best, average and worst). In our approach, we first determine an area out of which the polar diagram does not change due to insertion or deletion of a site. Then we present a new algorithm to solve the problem in O(kp) time where kp is the number of the sites whose polar regions are affected by the new addition or deletion of p.     

Neural network prediction of bioleaching of metals from waste computer printed circuit boards using Levenberg-Marquardt algorithm

The applicability of artificial neural network (ANN) to predict the bioleaching of metals using from computer printed circuit boards (CPCB) and the influence of process parameters were studied. The influence of process parameters initial pH (1.6-2.4), pulp density (2%-13%), and the initial volume of Inoculum (5%-25%) were investigated on the rate of bioleaching of metals from CPCB. Network inputs were fed as initial pH, pulp density, and inoculum volume and with the extraction of Cu, Ag, and Au as output. The ANN was developed using the Levenberg-Marquardt algorithm and trained for modeling and prediction. The most fitting architectures for Cu, Ag, and Au were [4-5-5-2-1], [4-7-5-2-1], [4-7-1-1-1] trained with Levenberg-Marquardt algorithm, respectively. The R values were observed to be 0.996, 0.997, and 0.993 for Cu, Ag, and Au extraction predictions, respectively. The genetic algorithm model defined by ANN was used to achieve maximum extraction rates for Cu, Au, and Ag. The predicted data showed that there is a great capability of using ANN for the prediction of Cu, Ag, and Au extraction from CPCB through bioleaching process. Hence, the ANN model can be used to control the operational conditions for improved metals extraction through bioleaching.