Microstructure and wear resistance of Fe-Cr-Ti-C reactive plasma cladding coating

Fe-Cr-Ti-C composite powder was synthesized by precursor carbonization-composition process using the mixture of ferrotitanium, chromium, iron powder and precursor sucrose as raw material. And then the Fe-Cr-Ti-C coating was prepared by reactive plasma cladding method. Microstructure of the samples was observed by scanning electron microscope （SEM）, the phases were determined by X-ray diffraction （XRD）, and the wear resistance was evaluated under dry sliding wear test conditions at room temperature. Results indicate that the composite coating consists of primary austenite and dendritic eutectic austenite, chrysanthemum-shaped eutectic （Cr, Fe ） 7 C3 and TiC carbide. TiC presents the gradient distribution and different shapes in the coating, corresponding to equiaxial structure both in fusion zone and central zone, while it presents dendritic structure on the surface, respectively. The wear mass loss is insensitive to load for the coating while it increases rapidly for Q235 steel base metal in this test. The wear mass loss ofQ235 steel is 14 times as that of the composite coating under applied load of 40 kg.

Comparison of the photo-acclimation potential of fl oating and benthic thalli of Sargassum horneri(Phaeophyta)during autumn and winter

Sargassum horneri is a foundational species and an important contributor to the fl oating seaweed stock along the northeastern coast of Asia.In this study,benthic and fl oating thalli of S.horneri were collected from Changdao Island(37°54′N,120°43′E),Bohai Bay,China.We conducted an in-situ and an indoor experiment to study the acclimation potential in S.horneri to abiotic conditions at sea surface in autumn and winter.Both benthic and fl oating thalli were cultured in situ for two months(from October to December)at diff erent depths:0 m above sea level(masl)and 3 m below sea level(mbsl),and their growth rate,biochemical content,and photosynthetic performance were compared.During the fi rst month of culture,the relative growth rate of fl oating thalli was 2-fold greater than that of benthic thalli at 0 masl.The photosynthetic rate of most thalli was signifi cantly higher at 0 masl than at 3 mbsl.In the indoor experiments,fl oating and benthic thalli were exposed to high light intensity(400μmol photons/(m^(2)·s)photosynthetically active radiation(PAR))for 21 d,and their photo-acclimation capacities were compared.Under high light intensity,the two types of thalli showed low maximum quantum yield(F_(v)/F_(m))and light utilisation effi ciency(α)but high light saturation point(E_(k)).Floating thalli showed higher photosynthetic rate and photoprotective ability than benthic thalli at high light intensity.The eff ective quantum yield of photosystem II[Y(II)]of both types of thalli recovered after a 6-day treatment with low light intensity(40μmol photons/(m^(2)·s)).These fi ndings suggest that S.horneri is highly acclimated to the sea surface environment,which possibly contributes to its rapid accumulation and long free-fl oating periods at the sea surface.

Syntheses and Characterizations of Two New Coordination Polymers Based on Dicarboxylate and Nitrogen-contained Mixed Ligands

Two new carboxylate coordination polymers [Ni（2,3＇-oba）（bib）]n] and [Mn（2,4＇-oba）（bib）0.5]n（2,3＇-oba = 2-（3-carboxyphenoxy）benzoic acid,2,4＇-oba = 2-（4-carboxyphenoxy） ben-zoic acid and bib = 1,4-bis（2-methyl-imidazol-yl）butane） have been synthesized and characterized by elemental analysis,IR and X-ray single-crystal diffraction studies.Compound 1 crystallizes in monoclinic,space group P21/c,while compound 2 in the triclinic space group P.Compound 1 displays a one-dimensional ladder-like chain.The dinuclear paddle-wheel secondary building units（SBUs） constructed by four 2,4＇-oba2-ligands in compound 2 are linked by bib into a 2D（4,4） layer structure.

Research on Computer Vision Detection Technology and Applications on Machinery Manufacturing and Automation

In this paper, we conduct research on general computer vision detection technology and the applications on machinery manufacturing and automation. Mechanical design manufacturing and the automation has profound connotation and good development prospects. Master its development trend can be more clear understanding of mechanical design and manufacturing and its automation in the future, it will open up a broader space for development. The development of modern science and basic technology, greatly promote the cross of different subjects and general penetration, the technology of the mechanical industry structure, product structure, function and structure, mode of production and the management system has changed dramatically.

On the Planning of Chinese Marine High-tech Industry Demonstration Zones:From the Perspective of Supply-side Structural Reform

China’s national agricultural high-tech industry demonstration zones focus on supply-side structural reform in their overall plan of development.This paper selected the China’s marine industry as its research subject and analyzes its current situation and major problems.After summarizing the current researches of China’s marine industry parks,from the perspective of supply-side structural reform,this paper specifies the tasks and objectives of the construction of the marine hi-tech industry demonstration zones.The overall planning of the demonstration zones must set distinctive developmen as its orientation,and we should emphasize innovation-driven and green development,devise a functional zoning that embraces marine-land and allround integration,and seek mechanism innovations that could invigorate the inner drive of development.The paper also puts forward the major principles that the planning of marine hi-tech industry demonstration zones should obey in the context of supply-side structural reform.

Exploration and Research on the Category Management for the Chain Retail Enterprises： Taking Jiajiayue as Example

In this paper, we conduct research on the category management for chain retail enterprises while taking Jiajiayue as the example. Category management theory research has more than ten years history, its core has been basically mature theory. The future study of category management focuses more on how to make the category management theory and be combined closely with the enterprise actual and pays more attention to the effect of the implementation and effect. Implementing category management investment return period is how to curve and how to evaluate the effect of the category management. The supermarket of the category management innovation is a huge project without a reasonable and predictable return that will be conducive to category management decision-making is unfavorable to the supermarket profits change after the implementation of category management right evaluation. Under this background, we propose our novel perspective on the corresponding issues to form the better theoretical analysis on the issues that is meaningful.

Research on the Logistics Cost and Enterprise Operation Efficiency with the Influences on International Trade

In this paper, we conduct research on the logistics cost and enterprise operation efficiency with the influences on international trade. With the deepening of the reform of the market economic system in our country, and the advancement of the reform of state-owned enterprises and government function transformation, the company is out of the shackles of the planned economy as the main body of market competition, at the same time, government regulators and investors in a state-owned capital market, all kinds of financial intermediaries and the information intermediary organizations, as well as the associated with the interests of closely linked to the enterprise value creation main body, including business owners and operators have yet to establish a timely to adapt to the market economy system. With this guidance, we propose the novel international trade paradigm for the companies that will enhance the efficiency of the general management.

Research on the Construction Mode of Mechanical and Electrical Integration of Intelligent Control System based on Multi-agent Technique

In this paper, we conduct research on the construction mode of mechanical and electrical integration of intelligent control system based on the multi-agent technique. The development of the modem science and technology has greatly promoted the cross of different subjects and infiltration, caused the technological transformation and revolution in the field of engineering. In the field of mechanical engineering, because of rapid development of microelectronics technology and computer technology to the mechanical industry and its mechanical and electrical integration, which is formed by the penetration of the technology of mechanical industry structure, product, organization, function and structure, mode of the production and management system, great changes have taken place in industrial production by the mechanical electrification ＂ushered in the development of＂ mechatronics ＂as the characteristics of the stage. Our research combines the multi-agent technique to propose the new paradigm for mechanical and electrical integration which is innovative.

Copper（Ⅱ） Acetylacetonate： An Efficient Catalyst for Huisgen- Click Reaction for Synthesis of 1,2,3-Triazoles in Water

An efficient and green copper（Ⅱ） acetylacetonate-catalyzed protocol for the Huisgen-click reaction in water at 100℃ has been established. The protocol was not only suitable for the reaction between organic azides and alkynes, but also suitable for one-pot three-component reaction among alkyl halides, NaN3 and alkynes.