GLCM based extraction of flame image texture features and KPCA-GLVQ recognition method for rotary kiln combustion working conditions

According to the pulverized coal combustion flame image texture features of the rotary-kiln oxide pellets sintering process,a combustion working condition recognition method based on the generalized learning vector(GLVQ) neural network is proposed.Firstly,the numerical flame image is analyzed to extract texture features,such as energy,entropy and inertia,based on grey-level co-occurrence matrix(GLCM) to provide qualitative information on the changes in the visual appearance of the flame.Then the kernel principal component analysis(KPCA) method is adopted to deduct the input vector with high dimensionality so as to reduce the GLVQ target dimension and network scale greatly.Finally,the GLVQ neural network is trained by using the normalized texture feature data.The test results show that the proposed KPCA-GLVQ classifer has an excellent performance on training speed and correct recognition rate,and it meets the requirement for real-time combustion working condition recognition for the rotary kiln process.     

语义Web服务的自动化组合方法：研究综述

语义Web服务的提出是为了解决Web服务资源在语义Web中的智能化整合问题,而语义Web服务的自动化组合技术作为这个整合过程中的一个关键技术正在蓬勃发展。本文考察了来自人工智能领域、形式化方法和自动推理等领域的众多服务组合方案,讨论了各种方法的原理和优劣之处,并探索了将来的研究工作和趋势。     

Synthesis, structure characterization and photocatalytic properties of two new uranyl naphthalene-dicarboxylate coordination polymer compounds

Two new uranyl-organic coordination compounds, UO₂(NDC)[(CH₃)₂SO)]₂ (1) and [UO₂(NDC)(CH₂OH)₂] (2) (H₂NDC = 1,4-naphthalene dicarboxylate), have been synthesized from the solutions of dimethyl sulfoxide (DMSO) and ethylene glycol (EG), respectively, through a volatilization method. Single-crystal X-ray diffraction analyses show that compound 1 consists of novel straight chains modified by pairs of DMSO molecules, whereas compound 2 features one-dimensional zigzag chains which are cross-linked by non-coordinating solvent molecules through hydrogen bonding interactions, forming a two-dimensional network. Both 1 and 2 decompose rhodamine B (RhB) molecules efficiently under the irradiation of UV and visible light.     

A novel 3D network coordination polymer consisting of paddlewheel Co3 clusters connected by PO4 and 4-pyridinecarboxylate

The synthesis, structural characterization and preliminary magnetic studies of a novel coordination polymer with paddlewheel Co₃ clusters are reported firstly. In the polymer, Co₃ clusters are covalently linked through PO₄ tetrahedra and 4-pyridinecarboxylate (4-pya) ligands into interpenetrated three-dimensional network.     

用描述逻辑进行语义Web服务组合

针对面向服务功能的语义Web服务组合问题,特别是经典的人工智能规划方法无法有效地处理Web服务执行过程中动态产生的新个体,以及基于服务匹配的方法则无法充分利用服务I/O参数类型之间大量的语义关联等关键问题,通过动态逻辑和描述逻辑之间的对比研究,采用描述逻辑公理来刻画Web服务的IOPR(inputs,outputs, preconditions and results),扩展了基于动态逻辑的人工智能规划方法,提出了把语义Web服务组合问题转化为描述逻辑推理问题的方法,克服了经典的人工智能规划方法中的困难和基于服务匹配的服务组合方法的缺点.     

Harris Hawk Optimization Algorithm Based on Cauchy Distribution Inverse Cumulative Function and Tangent Flight Operator

Harris Hawk Optimization (HHO) algorithm is a new population-based and nature-inspired optimization paradigm, which has strong global search ability, but its diversified local search strategies easily make it fall into local optimum. In order to enhance its search mechanism and speed of convergence, an new improved HHO algorithm based on the inverse cumulative function operator of Cauchy distribution and tangent flight operator was proposed. The proposed two operators are used as scale factors to control the step size. The walk path of Cauchy inverse cumulative integral function shows that its trajectory step length is relative to the average, which can further enhance the search stability of the algorithm. The Tangent flight has the function of balanced exploitation and exploration, and enhances the convergence ability of the algorithm. In order to verify the performance of the proposed algorithm, the 30 benchmark functions of the 2017 Institute of Electrical and Electronic Engineers (IEEE) Conference on Evolutionary Computation (CEC2017) and two practical engineering design problems are adopted to carry out the simulation experiments. On the other hand, the covariance matrix adaptation evolutionary strategies (CMA-ES), arithmetic optimization algorithm (AOA), butterfly optimization algorithm (BOA), bat algorithm (BA), whale optimization algorithm (WOA), sine cosine algorithm (SCA), and the proposed HHO algorithms were used for comparison experiments. Simulation results show that the proposed the Cauchy-distribution and Tangent-Flight Harris Hawk Optimization (CTHHO) Algorithm has strong optimization capability.

     

Eu3+ and Lysine Co-intercalated α-Zirconium Phosphate and Its Catalytic Activity for Copolymerization of Propylene Oxide and CO2

A novel composite material, α-Zr(HPO₄)₂·1.5Lysine:0.06Eu³⁺ (designated ZLE), has been prepared through intercalation of L-lysine (Lys) molecules and Eu³⁺ ions into between the layers of α-Zr(HPO₄)₂ (α-ZrP). It is proposed that the ZLE material contains Eu complexes lying between adjacent layers of Lys molecules which are attached on the inner surface of α-ZrP, and the Eu³⁺ ions are coordinated by carboxyl groups of Lys molecules. The ZLE composite in combination with Al(i-Bu)₃ and glycerin has been used as a catalyst for the copolymerization of propylene oxide (PO) and CO₂, and the catalytic system exhibits performance superior to the previously reported Y(P₂₀₄)₃-Al(i-Bu)₃-glycerin system.     

硅溶胶-凝胶化反应在陶瓷胶态成型中的应用

研究了一种新的凝胶成型工艺,将硅溶胶-凝胶特性成功运用于陶瓷部件胶态成型.该成型过程是正硅酸乙酯(TEOS)在强碱性条件下水解得到硅溶胶,硅溶胶通过凝胶化反应生成Si-O-Si网络空间结构的凝胶,进而固定悬浮体中陶瓷颗粒形成陶瓷坯体.运用该方法成型得到的坯体具有较高的强度,均匀的显微结构.此外,该方法具有毒性低,固化速度快等优点.     

Mixed-bonded open-framework aluminophosphates and related layered materials

The structural features, the synthesis and the role of templates in the synthesis for mixed-bonded open-framework aluminophosphates and related layered materials will be reviewed in this article. These aluminophosphate materials differ from the (4,2)-connected aluminophosphates and zeolites in that they contain TO₅ and/or TO₆ primary building units or terminal T-O bonds (T stands for Al or P). The extra ligands for the TO₅ and TO₆ units in the aluminophosphates with framework Al/P = 1 are either bridging OH groups or H₂O molecules in most cases whereas the terminal T-O bonds are either P-OH or P=O species with P=O bonds being prevalent in layered aluminophosphates. Most of TO₅ or TO₆ containing aluminophosphates are prepared using a cyclic amine or a diamine as the structure directing agent (template), and the aluminophosphates with Al/P<1 or the layered materials tend to form from an alcoholic medium. Both synthetic conditions and templates play a critical role in determining the composition and structural feature of these materials. This revised version was published online in August 2006 with corrections to the Cover Date.     

Nitrogen-doped graphene microtubes with opened inner voids: Highly efficient metal-free electrocatalysts for alkaline hydrogen evolution reaction

A facile method was developed to fabricate nitrogen-doped graphene microtubes (N-GMT) with ultra-thin walls of 1–4 nm and large inner voids of 1–2 μm. The successful introduction of nitrogen dopants afforded N-GMT more active sites for significantly enhanced hydrogen evolution reaction (HER) activity, achieving a current density of 10 mA·cm^–2 at overpotentials of 0.464 and 0.426 V vs. RHE in 0.1 and 6 M KOH solution, respectively. This HER performance surpassed that of the best metal-free catalyst reported in basic solution, further illustrating the great potential of N-GMT as an efficient HER catalyst for real applications in water splitting and chlor-alkali processes.

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