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Research of Intelligent Monitoring System of Tower Crane Based On RFID Xijian ZHENG1, a, Jinbao ZENG2, b and Hong ZHANG3, c 123School of Traffic and Mechanical Engineering, Shenyang Jianzhu University, Shenyang China 110168 axijianzheng@sina.com, bfenzonzeng@163.com, cyiren630@163.com Keywords: Tower cranes group; RFID; Anti-collision; Internet of Things Abstract: To ensure the efficiency and safety of the construction, it needs to monitor the real-time work status of single tower crane and between each other.
However, due to the factors such as unreasonable optimal configuration of tower cranes, lower collaboration efficiency and unable to issue warning signals when encounter dangerous situations, construction progress would be affected or even lead to construction incidents.
Coupled with its advantages of small size, strong anti-interference ability, non-contact transmission, no barrier reading as well as larger data storage, and combined with the characteristics that there are many obstacles in construction sites and many electromagnetic waves generated by the electrical and mechanical equipments, there will certainly be a good prospect of application for RFID technology in the wireless communication system of group controlling of the tower cranes. 2 Hardware System Design of Wireless Communication System Fig. 1 The hardware system block diagram of tower crane The design of the hardware system structure includes the microprocessor (C8051F020), I / O expansion module (for digital-to-analog conversion), the buzzer alarm module (for hazard warning), relay control parking module (for emergency stop of tower crane), GPRS module (for long-distance wireless communication), RFID wireless communication module (for signal acquisition and data transmission) and
The tower crane's hardware system block diagram is shown in Figure 1. 3 Application of RFID Technology in Wireless Communication System of Group Controlling of the Tower Cranes During the operations of the tower cranes group, accidents such as tower crane collisions often occur because of the factors of irrational allocation of resources, poor coordination between the tower cranes and unable to send timely early warning signals when tower cranes are close, which cause huge property losses and casualties.
Mechanical Engineering and Automation.

Deficiencies mainly reflect in: laboratory experiment for test is more costly; experimental conditions is limited; need large quantities of sample, and the experimental results are affected by the product batch and cost factors, etc.
Due to the size of the enterprise production scale is determined by how much production is, so the efficiency of enterprise production is not the same. 4.3 Conduct heat dissipation maintain for electrical automation control equipment Temperature is the most common factors in equipment operation lead to low control equipment reliability index.
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Introduction SiCp/Al composites have excellent mechanical characteristics such as high intensity and stiffness ratio, low coefficient of hot expand and good conductivity, which have been more researched and have good application in new composites.
Material of experiment SiCp/Al composites CY1110，mechanical characteristics as Table 1 Table 1 Mechanical characteristics of SiCp/Al composites material Volume fraction Vf(%) Modulus elasticity E [Gpa] flexural strength f [Mpa] SiC particle size [μm] CY111 56 220 400 60 Measuring equipment: YDX－III9702 three dimensional milling dynamometer which is developed and produced by Dalian University of Technology .
The signals acquired in the experiment include not only grinding force signal but interference signals such as noises , for being influenced by many factors in grinding process.
Analysis of constructed grinding force ratio The grinding force which evaluates the grinding property of the material is an important data in grinding process.
There are several factors to affect the grinding force ratio, it is not only related with the material of the grinding wheel, but also it differs according to the characteristics of the grain materials.

Recently the issue is again being raised for the newly developed pretreatment technology using nanofiltration (NF) membrane which has special separation properties owing to the charge characteristics of its surface separation layer.
Conventionally, physically pretreatments such as mechanical filtration and sand filtration are used.
However, for SWRO, scaling is the most urgent factor which is caused by the divalent ions (Ca2+, Mg2+, and SO42-) in seawater, and UF is not effective for the separation of divalent ions.
Therefore, it can be deduced that not only charge exclusion but also steric hindrance effect have affect the rejection of the divalent ions considerably.
For SWRO desalination, scaling is one of the most important influencing factors, the feed of SWRO should have lower concentration of both sulfate and Ca2+ ions, and the NF membrane should have higher rejection of sulfate ions and Ca2+ions.

The presence of DCHM did not modify neither the degree of conversion to low-crystallinity HA nor the measured setting times of the CPCs, however, the amount of incorporated microparticles considerably affected the degree of porosity (macropores of 200 µm) and interconnectivity of the cement matrix.
On the base of their properties, the CPCs pastes can easily fill osseous cavities of any geometry, which leads to an optimal tissue-biomaterial contact [2].
These are promising results in order to employ these calcium phosphate cements in bone restorations under low mechanical stresses.
The presence of DCHM did not modify neither the degree of conversion to low-crystallinity HA nor the measured setting times of the CPCs, however, the amount of incorporated microparticles considerably affected the degree of porosity (macropores of 200 µm) and interconnectivity of the cement matrix.
Burger: Transforming growth factor-β1 incorporation in a calcium phosphate bone cement: material properties and release characteristics; J.

Therefore, different activation energies and pre-exponential factors are obtained in the two different temperature ranges.
Combinatorial Research of NiMnGa Alloys Mechanical Properties.
The mechanical property of NiMnGa alloys is important for practical applications.
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Martensitic transformation and mechanical properties of Ni49+xMn36–xIn15 (x= 0, 0.5, 1.0, 1.5 and 2.0) alloys, Materials Science and Engineering: A 646 (2015) 57-65

Introduction Grain size can be regarded as a key microstructural factor affecting nearly all aspects of the physical and mechanical behavior of polycrystalline metals [1].
The hot pressing and sintering processes always be associated with grain coarsening, which leads to deterioration of the mechanical properties of the component [4].
This indicates a significant degree of inhomogeneity in the distribution of mechanical properties across the disc cross section.
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Rassoul, "Influence of HPT on the Consolidation Behavior and Mechanical Properties of AA6061-SiCp Composites Powders", Supplemented Proceeding: Volume 1, Mat.

It was established arc current is the most important factor affecting the layer geometry.
Mechanical properties close to the boundary (hardness and connection strength) appeared to be sufficient [34].
Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing. 651, 18-26.
[35] Liu L.M., Zhuang Z.L., Liu F. and Zhu M.L., (2013) Additive manufacturing of steel-bronze bimetal by shaped metal deposition: interface characteristics and tensile properties.
Mechanical and tribological properties of a metal wall grown by an electric arc method in an atmosphere of shielding gas.

Treatment causes some changes in the properties of the substrate such as a reduction of the % water uptake (up to 15%) as well as an increase in the elastic modulus (up to 10%). 1.
Since the application of consolidants in building materials greatly affects their physico-chemical and physico-mechanical characteristics, they must satisfy certain specifications [1].
During the preparation process, some certain critical parameters are affecting the properties of the final solution both in the liquid and solid phases.
Velo-Simpson, “Particle-modified consolidants: A study on the effect of particles on sol-gel properties and consolidation effectiveness, Journal of Cultural Heritage 8 (2007) 1-6
Padavettan, Synthesis of Silica Nanoparticles by Sol-Gel: Size-Dependent Properties, surface Modification, and Applications in Silica-Polymer Nanocomposites- A Review, Hindawi Publishing Corporation Journal of Nanomaterials V. (2012)

Spinel NiFe2O4 is a good magnetic material, but apply properties were affected by the average size of the particles.
At present, several techniques have been developed to prepare NiFe2O4 nanoparticles, including sol–gel method[4-6] ,Hydrothermal method[7,8],shock wave method[9],mechanical alloying[10],SHS[11,12]and etc[13,14].
The carbon-adsorb auto combustion method was a good powder prepared technology which use of the activated carbon can adsorb anions and cations from the solution,due to the special geometry structure and chemical properties of the activated carbon surface, and then the nanoparticles obtained through dryness process and thermal treatment.
The TEM images were obtained on a JEM-1005X transmission electron microscope.The magnetic properties of the NiFe2O4 nanoparticles was analyzed with 7340-type vibrating sample magnetometer.
The reaction mechanism of carbon-adsorb The adsorption of activated carbon mainly come from the inhomogeneous geometry structure and chemical properties of the activated carbon surface.