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Concentration Variation and Morphological Types of PM2.5 in Suburban of Yinchuan City CHEN Wu1,2, DONG Faqin1*, DENG Yuequan2, DAI Qunwei1,3, HUANG Yunbi1,3, ZHOU Shiping1,3 1 Key Laboratory of Solid Waste Treatment and the Resource Recycle, Ministry of Education, Southwest University of Science and Technology, Mianyang，China 621010 2 School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, China 3 School of Environment and Resource, Southwest University of Science and Technology, Mianyang, China *Corresponding author: DONG Faqin , E-mail address: fqdong@swust.edu.cn Keywords: PM2.5; mass concentration variation; morphology type; SEM Abstract.
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The results showed that active corrosion occurred on the rusted specimen covered with many thin spherical shells of solid material.
It reveals the reddish brown layer of the rusted specimen, which is covered with many thin spherical shells of solid material, indicating active corrosion occurring on the rusted specimen.
Reddish brown powdery material was observed underneath the dark shell and presence of shallow pits was found.
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Material models An overall analysis model consists of three types of materials: mortar, coarse aggregate and aggregate-mortar interface.
Acknowledgment The author would like to thank for the financial support received from National Science Foundation of China(grant No. 50908026)and Post-Doctoral Science Foundation of China (grant No. 20080441117; 200902541).
Ueda: Journal of Advanced Concrete Technology.
Yasuo：Journal of Structural Engineering.
Rusch:ACI Journal.

The main properties make them suitable for a variety of applications, where the presence of high temperatures and chemical aggression does not allow the use of metallic or polymeric materials.
Several studies demonstrate that it is appropriately combining raw materials and processing techniques; these negative aspects can be minimized [8-9].
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These conventional wood dryers function under the basis of convective heat transfer from circulating hot air to the surface of wood followed by subsequent conductive heat transfer from the surface to the centre of wood thus it takes weeks and months to dry materials [4].
Materials and methods A.
Islam: ‘A Review on Quality Enhancement of Oil Palm Trunk Waste by Resin Impregnation: Future Materials’, BioResources, 2013, 8 (2), 3136-3156
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The test setup used in this paper is GWY-2000 wear testing machine, developed by Lanzhou Institute of Chemical Physics, Chinese Academy of Science.
The grinding materials are Si3N4 ceramic balls, whose diameter is 10mm.
According to the theory of molecular and mechanical meshing mechanism, during the wear process, the plastic deformation of materials make the wear surface tallied, contact area increased, and great dislocations form work-hardening to increase the hardness and wear resistance of test materials.
(a) Sample 1 (b) Sample 2 (c) Sample 3 Fig. 1 The wear appearances under lower amplification From Fig.1 it can be seen that there exists adhesive wear and the white area is the softer metal materials (In this case these materials are TFHS-1 steel samples because the ceramic balls used in the testing have much higher hardness).
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Introduction Honeycomb paperboard is wildly used as packaging materials.
It holds many advantages compared with other package materials owing to the hexagon core structure and as a recycled green material.
There had been some researches on the mechanical behavior of honeycomb materials.
Packaging Technology and Science.
Journal of the Structural Division, 2002 ,102 (9) :701 - 717

From which 229 papers have been accepted for presentation at the conference and will be published by TTP, in Applied Mechanics and Materials (AMM) Journal (ISSN: 1660-9336), which is online available in full text via the platform www.scientific.net.
Wang, Pohang University of Science and Technology, Korea X.
Zhang, Henan Institute of Science and Technology, China H.
Gao, Henan Institute of Science and Technology, China G.
Zhang, Henan Institute of Science and Technology, China H.

The result indicated that the point of the highest temperature located on the middle of firebox which under the dangerous temperature of the material; under thermal stress effect, the max displacement of the piston did not exceed the clearance between piston and cylinder liner, but the non-roundness at the third ring reached 0.08mm, which had some influence on the pressurize and lubricate of piston; under thermal-mechanism coupled effect, the point of max stress located on the interface of the seat of the pin and the pin hole, so as the top on the pin hole and inner on the seat of pin, so it was recommended to set rib between cervix and the seat of pin of piston to enhance the practical carrying capacity of the seat of the pin.
The max stress in the whole stress field was 127.75MPa which was under the ultimate press of the material: 230MPa.
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