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Among all multiferroic materials, BiFeO3 (BFO) is one of the rare multiferroic materials, exhibiting both ferroelectric and antiferromagnetic properties at room temperature with its relatively high Neel temperature (TN = 653 K) and Curie temperature (TC = 1103 K) [5].In past decades, many efforts have been made to synthesize single phase BFO.
For sol–gel route, bismuth nitrate (Bi(NO3)3·5H2O) and iron nitrate (Fe(NO3)3·9H2O) were used as starting materials, citric acid as chelating agent, and 2-methoxyethanol as solvent.
For hydrothermal route, bismuth nitrate and ferric chloride (FeCl3·6H2O) were used as starting materials, potassium hydroxide (KOH) as  mineralizer.
Song, Synthesis of BiFeO3 nanoparticles by a low-heating temperature solid-state precursor method, Materials Research Bulletin 48 (2013) 383-388
Chen, Synthesis of pure-phase BiFeO3 nanopowder by nitric acid-assisted gel, Materials Letters 124 (2014) 242-244

The Positron Annihilation Lifetime (PAL) technique provides information about electron densities and the Doppler broadening of annihilation radiation (DBAR) measurement gives only qualitative information about the momentum density for materials under study [1, 2].
The PAL spectra in materials typically exhibit three lifetime components.
The �\ decreases with increasing the frequency verifying the fact that, for polar materials (PVC), the initial value of �\ is high but as the frequency of the a.c. field is raised, the value of �\ begins to drop.
This is not the bulk dielectric constant but rather is due to the free charge motion within the materials and is sometimes known as “space-charge polarization” [6].
Prochazka, Materials Structure 8 (2001), p. 55 [2] E.

Rujijanagul* Department of Physics, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand *rujijanagul@yahoo.com Keywords: Dielectric permittivity, Phase transition, PZT-PZN-PNN ceramics Abstract.
Introduction In the last decade, normal ferroelectric such as lead zirconate titanate [PbZr1−xTixO3, PZT] has become an important commercially produced piezoelectric materials.[1-3] Excellent piezoelectric properties of PZT have been observed in compositions close to the morphotropic phase boundary(MPB Zr:Ti ,52:48). [1-3] Locating the MPB for the ferroelectric materials is very important for making the phase diagram and for obtaining excellent electrical properties.
Acknowledgements This work was supported by The Thailand Research Fund (TRF), National Metal and Materials Technology Center (MTEC), Faculty of Science and Graduate School Chiang Mai University, and Commission on Higher Education (CHE) Thailand.
Herbert : Electroceramics Materials Properties and Applications (Chapman and Hall, New York, 1990)
Halliyal: Journal of American Ceramics Society Bull. (1987)

Moscow 119977 GSP-1, Kosygin st.4, Russia, shant@chph.ras.ru 7 Materials Science Division, Research Laboratory for Nuclear Reactors, PRESTO/CRESTJST, Tokyo Institute of Technology, Ookayama, Meguro, Tokyo 152-8550, Japan, jonoe@nr.titech.ac.jp ���� -G[YQTFU-G[YQTFU-G[YQTFU-G[YQTFU�����Positron, Doppler-broadening, Fullerene, C60, C70, nanotube� ���� #DUVTCEV�#DUVTCEV�#DUVTCEV�#DUVTCEV�� Coincidence Doppler-broadening spectroscopy was applied to C60 and C70 fullerenes and other carbon phases, such as nanotubes and graphites.
Remarkable differences were observed in the Doppler-broadening of the positron annihilation �-rays in these materials, which reflect the different densities distribution of the momentum for electrons annihilated with positrons.
On the other hand, after the discovery of C60 and C70 fullerenes, positron annihilation lifetime was also examined for those materials[1, 2, 3].� In a previous report, we reported our first measurement of� the positron lifetime and Doppler-broadening of the annihilation � ray[4].� At that time, although we measured the Doppler-broadening of the annihilation � -ray using just a single Ge detector, we were able to observe a difference in the Dopplerbroadening spectrum of C60, C70, nanotubes and graphite.
To clarify those differences, we tried to examine those materials using the coincidence Doppler-broadening method.
This would reflect the different positron distributions in those materials caused by their geometric structure.

Introduction 　　Building doors and windows are important building materials in construction and the main component of the wall of the structure.
Doors and windows materials selection At present in China the window frame materials are commonly used in wood, plastic (PVC), aluminum alloy and steel.
The heat conduction coefficient of the 4 window frame materials listed in table 1.
Strategic Management Journal, 2012(21):102-103
The Era of Science and Technology，2012：48-49.

Introduction It is well known that the quenching can improve the mechanical properties of metallic materials.
References [1] N.Lior: Journal of Materials Processing Technology(2004), 155-156, p. 1881-1888
[3] Xu Zuyao: The Principle of Phase Transformation, Science Press(1988), Beijing, China
[5] Heming Cheng , Jianbin Xie and Jianyun Li: Computational Material Science(2004), 29(2004),p.453-458
[6] Liu Zhuang: Science Press(1996), Beijing, China

In fact, Magnesium alloys as structural materials are widely used in atmospheric environments, but literature on atmospheric corrosion is scarce [3].
The materials used for extrusion process were cut from as-cast EW75 magnesium ingots.
Materials and Design 2011, 32: 1194-1199 [3] LiJing Yang, YanFang Li, YingHui Wei, et al.
Corrosion Science 2008, 50: 166-177 [9] Ting Li, Zhiwei Du, Kui Zhang, et al.
Journal of Alloys and Compounds 2013, 574: 174-180 [10] Lindstrom R, Svensson J E, Johansson L G.

Nickel oxide is one of the more popular electrochromic materials after tungsten oxide.
Sol-gel deposited electrochromic NiO films can be made by busing different precursor materials.
Acknowledgements This work was financially supported by key project on nano-materials science of Anhui Province (No. 01402006), and Nature Science Foundation of Anhui Province under project 01041404, which are gratefully acknowledged.
，Molecule-based Materials.Shanghai, Shanghai Science & Technology Press, Shang Hai , 2001,p242 [14] Wruck D A,Rubin M., J.
Wang , Materials Chemistry and Physics Vol.77 (2002) , p.384 [16] Crandell R S,Faughuan B W.

Study on household registration management system Ying Li1,a, Hong Yan2,b, Meihua Wang3,c , Shimin Zhang4,d 1Institute of Information Science & Engineering,Hebei University of Science and Technology,Shijiazhuang Hebei,China 2College of Polytechnic, Hebei University of Science and Technology,Shijiazhuang Hebei,China 3Institute of Information Science & Engineering,Hebei University of Science and Technology,Shijiazhuang Hebei,China 4Institute of Information Science & Engineering,Hebei University of Science and Technology,Shijiazhuang Hebei,China ajszxly@126.com, by1h1y2h2@sina.com, cwmhvbst@126.com, dzhshm@hebust.edu.cn Keywords: household registration management ;ASP.NET; SQL SERVER;IIS;Browser/Server Abstract.
It is a series of cockamamie works to register,inquire,count and fill the reports of the university household register information .As the increasing of students’entrance and graduation in every campus each year,the management of the university household register information will cost more and more manpower and material resources,meanwhile, manual labor management is affected by many factors and is easy to produce ambiguity and bring difficulties to recognize,it is obviously not adapt to the need of university household register,so computer and network mamagement are necessary and urgent[3].
Acknowledgements This work was financially supported by the Hebei Province Science and Technology Planning Projects(06213533).
Journal of Yunnan Police Officer Academy, No. 4(2007),p. 109–112 [3] Zongyao Yang: Reform ing the System ofDom iciliary Transfer ofUniversity Students.Journal of Wuhan University of Science and Technology,Vol 8, No. 1(2006),p. 48-50 [4] Jinshan Yu and Hui Lin: SQL Server 2000/2005 database development example introduction and improve.Publishing House of Eletronics Industry(2005) [5] Chaoyang Shen and Yanhao Song: Asp.net and relational database technology senior guidelines.China WaterPower Press(2005) [6] Zhaohui XU and Yinting Fan: Design and Implementation of MVC Design Pattern in ASP.NET Application.Journal of Southwest University of Science and Technology,Vol. 22, No. 3(2007),p. 83-86,91 [7] Gongwen Chen: Implementation of Service-oriented Development Framework Based on .NET.

Preparation and Characterization of excellent flame retarded rigid polyurethane foams Anzhen Zhang a, Yihe Zhang＊b State Key Laboratory of Geological Processes & Mineral Resources, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences (Beijing), Beijing 100083, China azaz1987@126.com,*bzyh@cugb.edu.cn Keywords: Rigid Polyurethane foam; Flame retardant; APP; EG; RP; DMMP; TCEP.
Polyurethane foam was the best performance of insulation materials, with low thermal conductivity, strong adhesion, and well water resistance. 49% of building insulation materials was the polyurethane foams materials in Europe and the United States, but there was less than 10% in China [1].
Experimental Materials.
This dilution was useful for the mixing of the raw materials and the foaming process, making a better foam structure.
Morgan in: Fire Retardancy of Polymeric Materials, Second Edition, US：CRC Press (2009), p.765