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Most proximity-based multi-view clustering methods are sensitive to the initial proximity matrix, where the clustering performance is quite unstable when using different initial proximity matrixes. This problem is defined as the initial value sensitivity problem. Since clustering is an unsupervised learning task, it is unrealistic to tune the initial proximity matrix. Thus, how to overcome the initial value sensitivity problem is a significant but unsolved issue in the proximity-based multi-view clustering. To this end, this paper proposes a novel multi-view proximity learning method, named multi-view consensus proximity learning (MCPL). On the one hand, by integrating the information of all views in a self-weighted manner and giving a rank constraint on the Laplacian matrix, the MCPL method learns the consensus proximity matrix to directly reflect the clustering result. On the other hand, different from most multi-view proximity learning methods, in the proposed MCPL method, the data representatives rather than the original data objects are adopted to learn the consensus proximity matrix. The data representatives will be updated in the process of the proximity learning so as to weaken the impact of the initial value on the clustering performance. Extensive experiments are conducted to demonstrate the effectiveness of the proposed method.

A new biological deodorization technology which is used in Tianjin Jizhuangzi Sewage Plant was introduced in this paper. The geographical position of Jizhuangzi Wastewater Treatment Plant is special. The plant has been surrounded by the living area. The problem of odor to people has been serious until a new deodorization technology is used. It is a source deodorization technology used special filler through vaccination, induction and catalytic to removed the malodorous sources. A special microbial incubator is used to culture and proliferate effective deodorant microorganisms on activated sludge sewage in the biological pool of the plant and then the sludge containing deodorant microbial reflowed to the wastewater inlet. The malodorous substances in the water are removed through adsorption, cohesion, biotransformation degradation and so on by the deodorant microbial. The case indicates that this technology is effective in practice and good for popularization. And this technology with simple process showed significant effect compared with other deodorant technologies and was more secure and convenient to build and run with low cost.

Wood plastic composite (WPC) of wood flour (WF), high density polyethylene (HDPE), maleic anhydride-grafted polyethylene (MAPE) and lubricant was prepared by extrusion, and then exposed to different temperatures to evaluate the effects of freezing and thermal treatment on its dimensional and mechanical properties. At elevated temperatures, WPC expanded rapidly initially, and then contracted slowly until reaching an equilibrium state. Treatment at 52°C and relative humidity of 50% for 16 days improved the mechanical properties of WPC: flexure, tensile strength, and izod unnotched impact strength increased by 8%, 10% and 15%, respectively. Wide-angle X-ray diffraction (XRD) tests showed that the degree of crystalization of HDPE in WPC declined with increasing treatment temperature.

A rod-packing, breathing MOF (1), with two crystalline structural intermediates (1 a and 1 b; H(2) btca = benzotriazole-5-carboxylic acid) has been investigated. An underlying net approach for analyzing possible breathing MOFs, and a set of geometric parameters that can quantitatively describe such a breathing structural feature, are suggested. The 3D luminescent MOF is a promising candidate for specific sensors with exceptional sorption capacity.

Two coordination compounds, Cu(pim) (1) and Cu2(ppt)·1.5H2O (2) (Hpim = 2-(4-pyridyl)-imidazole, H2ppt = 5-(4-pyridyl)-1H-1,2,4-triazole-3-thiol), based on ligands with a “T”-shaped structural unit were reported here. 1 presents a 2D layer network, whereas 2 shows a MOF containing a 1D tubular channel, which are constructed utilizing a similar unit to the 2D layer in 1, representing a new strategy to construct tubular frameworks. Furthermore, basic properties such as photoluminescence and gas adsorption have been investigated as well.

Hydrolyzed Kevlar fibers (KFs) were compouded into high-density polyethylene (HDPE) with wood flour (WF) by twin-screw/single-screw extruder to investigate the reinforcement effects of KFs on the mechanical properties of conventional WF/HDPE composites. Maleated HDPE (MAPE) was used as a compatibilizer. The mechanical properties significantly improved as the KFs loading increases in the presence of 4% MAPE, such as tensile strength 14.7%, tensile modulus 12.4%, flexural strength 22.2%, flexural modulus 22.4%, and impact strength 41.7% with 2 wt.% KFs compared to WF/HDPE composite with MAPE. The fiber matrix morphology of the interface region in the composites was examined using scanning electron microscopy (SEM).

A series of Ag(I) coordination oligomers with Ag-Ag distances tuned by amine auxiliary ligands were designed and synthesized. Their dual emissions could be adjusted by changing either excitation energy or temperature. The emission assignments were clarified by both experimental and DFT evidence herein.

The racemic conglomerate (1P-NH3 + 1M-NH3) and enantioenriched bulk samples (1P-H2O or 1M-NH3) of Co(II) metal–organic frameworks were obtained from achiral precursors under different solvothermal conditions. The bulk homochirality was generated through asymmetrical crystallization in the absence of any chiral additives confirmed by single crystal X-ray diffraction and CD spectroscopy.

Suppressing or eliminating spiral waves in an excitable medium is of practical significance. In this paper, the parametric wave is used to eliminate the spiral wave in an excitable medium modeled by Barkley equations. We found that the parametric wave could push the spiral tip out of the medium, thereby eliminating the spiral wave. Interestingly, parametric waves with particular amplitude and wave velocity could make the spiral tip drift along straight lines, which may correspond to efficient suppression of the spiral wave. Numerical results show that the drift velocity increases with the amplitude of the parametric wave prominently, while the frequency does not influence V significantly. The drift direction is determined by both the amplitude and frequency of the parametric wave. The parametric wave can push the spiral to drift along a totally different direction, even the opposite one, depending on the amplitude and frequency.

We present the best possible lower and upper bounds for the Neuman-Sándor mean in terms of the convex combinations of either the harmonic and quadratic means or the geometric and quadratic means or the harmonic and contraharmonic means.

Three cupric coordination assemblies [Cu(btca)(H(2)O)(2)] (1), [Cu(btca)(H(2)O)(3.5)](8)·16H(2)O (2), and [Cu(2.5)(btca)(1.5)(Hbtca)(0.5)(μ-Cl)(0.5)(μ(3)-OH)(H(2)O)]·H(2)O (3) have been solvothermally synthesized by cupric salts and a bifunctional ligand benzotriazole-5-carboxylic acid (H(2)btca) in different solvent medium. These complexes were structurally characterized by X-ray diffraction analyses and further identified by infrared spectra (IR), elemental analyses, powder X-ray diffraction (PXRD), and thermogravimetric analyses (TGA). Single crystal structural analysis shows that these coordination compounds assembled by the almost same reactants present diverse dimensional crystal structures, wherein 1 possesses two-dimensional (2D) layers with (4.8(2)) topology, the zero-dimensional (0D) neutral metallomacrocycle with flat octagonal geometry in 2 connects each other through hydrogen bonding to extend to be a three-dimensional (3D) nanotubular network, and 3 exhibits 3D framework with 1D honeycomb channels constructed by the strip-shaped chains containing [Cu(5)(μ(3)-OH)(2)(btca)(4)](-) pentaclusters bridging to the adjacent Cu(6)(btca)(12)(6-) cages. The diversity of these structures mainly stems from the versatile coordination modes of the anionic ligand in each compound, especially the 1,2,3-triazolate group: bidentate μ(1,2) bridging mode in 1, bidentate μ(1,3) bridging mode in 2, and tridentate μ(1,2,3) bridging mode in 3, respectively. Furthermore, the magnetic properties of 1-3 have been investigated as well.

In the title compound, C15H13N3O4, the pyridine and benzene rings are nearly coplanar [dihedral angle = 4.92 (12)°]. The maximum deviation from the best least-squares plane calculated for the main molecular skeleton is 0.1722 (1) Å for the carbonyl O atom. In the crystal, intermolecular O—H...O hydrogen bonds connect the molecules into a chain, while π–π stacking interactions between the pyridine and benzene rings [centroid–centroid distance = 3.9162 (8) Å and offset angle = 27.20°] complete a two-dimensional network.

In the title compound, C15H13N3O4, the pyridine and benzene rings are nearly perpendicular [dihedral angle = 84.24 (5)°]. In the crystal structure, classical O—H...N hydrogen bonding between the OH group of the carboxyl unit and a neighbouring pyridine ring N atom and N—H...O hydrogen bonding between the imine NH group and a neighbouring O atom of an acyl unit, together with complementary non-classical C—H...O hydrogen bonds between carboxyl O atoms and neighbouring CH groups, link the molecules into a three-dimensional system.

In the title compound, [CoCl(2)(C(13)H(9)Cl(2)N(3)O(2))(2)(C(12)H(8)N(2))]·CH(3)OH, the Co(II) atom is octahedrally coordinated by two N atoms from the pyridyl rings of the tridentate N'-(3,5-dichloro-2-hydroxy-benzyl-idene)pyridine-4-carbohydrazide (H(2)L) ligand, two N atoms from the 1,10-phenanthroline ligand and two chloride ions. The acyl-hydrazone groups are not involved into the coordination of the metal ion. In the crystal packing an extended three-dimensional network formed by N-H⋯Cl, N-H⋯O, O-H⋯N, O-H⋯N and O-H⋯Cl hydrogen bonds is observed.