Molecular dynamics simulations of microstructural properties of CaO–SiO2–TiO2 fluorine-free slag systems

The microstructural properties of F-free slag, the CaO–SiO₂–TiO₂ (CST) systems, are investigated by molecular dynamics (MD) simulations. The results show that in the CST system, the average bond length of Si–O remains in 1.61?Å. The addition of TiO₂ contributes to the increase in the concentrations of 4-coordinated Si and 4-coordinated Ti. Increasing the amount of CaO decreases the proportion of bridging oxygen (BO) atoms and the degree of network connectivity (Q³ and Q⁴), suggesting the simplification of melt polymerisation. Substituting CaO with SiO₂ and maintaining a constant TiO₂ level causes the microstructure of the slag to become more complex. Both SiO₂ and TiO₂ contribute to the more complex structures of the melts. Simultaneously, Si–O–Ti linkages are more favourable than Si–O–Si or Ti–O–Ti linkages. Thus, TiO₂ is regarded as network former in terms of its structure within CST system when the content of TiO₂ excessed 28 mass%.     

Incentives for early adoption of carbon capture technology: Further considerations from a European perspective

This note details two comments on a recent policy proposal in Comello and Reichelstein (2014) aimed at favoring the early adoption of Carbon Capture (CC) technology in the next generation of thermal-based power plants to be installed in the United States. First, we examine the implications of a worst-case scenario in which no new CC is adopted internationally beyond what is in place in 2014. Second, we show the potential, under the original proposed subsidy, for the emergence of coordination failures capable of hampering the desired early CC deployment. We propose and evaluate modified schedules of tax-credits sufficient to overcome these concerns. These additions strengthen the argument in the original article: namely, though higher incentive levels are necessary, our findings confirm that the cost of the proposed policy is not out of reach.     

SiP协调设计和PI解析(6)

概述了SiP(系统封装)协调设计和PI解析:(1)协调工程(下);(2)电源供给电路;(3)SSD噪声;(4)旁路电容。     

Synthesis of 4-arms hydroxy-functionalized PMMA-b-PE through combining free radical polymerization with coordination polymerization

The copolymerization of MMA with ethylene was promoted by metallocene complex in the presence of initiator tetra(2,3-epoxy propoxy)silane (I_s), reducing agent Zn and cocatalyst MAO, combining free radical polymerization with coordination polymerization via sequential monomer addition strategy in one-pot to produce 4-arms hydroxy-functionalized PMMA-b-PE. The effects of polymerization conditions such as temperature, time, ethylene pressure and Al/Ti molar ratio on the polymerization performance were investigated. 4-Arms hydroxy-functionalized PMMA-b-PE was obtained by solvent extraction and determined by GPC, MALLS, DSC, FT-IR, WAXD and ¹H(¹³C) NMR. The DSC result indicated that the 4-arms hydroxy-functionalized PMMA-b-PE had one T_g at 87.0 °C and one T_m at 117.0 °C which attributed to T_g of PMMA segment and T_m of PE segment, respectively. The microstructure of 4-arms hydroxy-functionalized PMMA-b-PE was further confirmed by WAXD, FT-IR, and ¹³C NMR analysis. These results demonstrated that the obtained 4-arms block copolymer consisted of PMMA segment and crystalline PE segment.     

产业园区高清卡口智能协同监控系统设计与实施

高清卡口智能协同监控系统采用数字高清摄像机采集进出入园区车辆的图像信息,通过公安专用光纤网络协同传输至公安局指挥中心的数字分析系统,进行信息协同处理和信息协同发布与更新,及时发现布控车辆及犯罪嫌疑人员,实现快速处置。     

矿业可持续发展的灰色动态评价

本文建立了基于灰色系统理论的矿业可持续发展动态评价模型，提出了以发展趋势和协调性评价为基本内涵的动态评价思路，并以我国有色金属矿业为例进行了矿业可持续发展动态评价实证研究。所用的方法及建模思路对其他类似产业乃至整个国民经济系统的评价也是适用的。     

纳米抛光碳化硅压力对相变影响的分子动力学模拟

为了研究纳米抛光碳化硅时压力变化对表面的影响规律,建立了金刚石磨粒纳米抛光碳化硅的分子动力学模型,数值模拟了纳米尺度下的碳化硅抛光过程,具体分析了抛光压力线性增大过程中的配位数为1至6的原子数量的变化规律,揭示了线性改变抛光压力对被加工表面相变的影响规律,仿真结果表明:压力是诱导碳化硅相变的主要因素,当抛光压力增大时,...     

A new (3,4,7)-connected topology framework based on [Cd2(CO2)3O4N2] second building unit

A new 3D coordination polymer [Cd₂(L³)(BTC)(H₂O)] (1) (HL³ = 3,5-bis(pyridin-3-ylmethoxy)benzoic acid, H₃BTC = 1,3,5-benzenetricarboxylic acid), has been isolated under hydrothermal condition and characterized by single-crystal X-ray diffraction. Compound 1 is constructed from Cd₂-based second building units (SBUs) [Cd₂(CO₂)₃O₄N₂] and displays a 3D (3,4,7)-connected net with (4²·6)(4³·6³)(4⁵·6¹¹·8⁵) topology. In addition, the photoluminescent spectra indicate compound 1 may be a good candidate for blue-luminescent materials.     

Two Novel Metal Phosphonate Compounds: Different One-Dimension Chain Structures Constructed by Imidazole and 1-Aminoethylidenediphosphonic Acid

Hydrothermal reactions of 1-aminoethylidenediphosphonic acid (AEDPH₄), imidazole (Im) and divalent metal oxides afforded two novel phosphonate compounds: Zn₂(AEDP)(Im)₃·H₂O (1), Cd₃(AEDPH)₂(Im)₅·Im (2). Compounds 1 and 2 are both one-dimensional (1-D) coordination polymers that illustrate different chain motifs. Compound 1 features a zigzag double chain structure while compound 2 has a distorted square-chain structure. Both compounds are further extended to form three-dimensional (3-D) supramolecular structures via hydrogen bonds. The effect of degree of deprotonization of AEDPH₄ on the structural types of the final products is also discussed. Electronic supplementary material The online version of this article (doi:) contains supplementary material, which is available to authorized users.     

突变理论在作战体系结构稳定性分析中的应用

提出作战体系结构主导度、协同度、破击度的概念及量化方法。将作战体系结构所处的状态分为稳定状态、混乱状态、崩溃状态,并以作战体系结构所处的状态为状态变量,崩溃状态对应于状态变量的最小值,混乱状态对应于状态变量的中间值,稳定状态对应于状态变量的最大值。以主导度、协同度、破击度为控制变量,建立燕尾突变分析模型,并进行实例分析。该方法为定量研究非对称作战的有效性问题提供了一种新思路。