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The article discusses the photocatalytic properties of titanium dioxide and its use in various industries.
Introduction Ensuring the durability and aesthetics of construction facilities, as well as environmental issues are very important factors associated with the search for modern and innovative materials and technologies [1-3].
Thanks to its specific properties, such as high mechanical strength, low weight and corrosion resistance, it is widely used in the aerospace and aviation industry [4], automotive industry [5], medicine [6,7], and recently also in civil engineering [8-10].
TioCem® cement contains nano-sized titanium dioxide of a polymorph anatase variation, which has photocatalytic properties.
Its physical and mechanical properties allow it to be used in the production of concrete and precast on the same basis as standard consumer cement

the Human Engineering Analysis of the Racing Wheelchair Tianmin Guan 1, a, Lei Lei 2,b and Jiangbo Li3,c 1 School of Mechanical Engineering, Dalian Jiaotong University, Dalian 116028, China ag2000tm@yahoo.com.cn, bleileidalian@163.com, clijiangbo_ok@126.com Keywords: the Racing Wheelchair; the human engineering analysis; CATIA.
In order to improve the human engineering properties for the racing wheelchair, using the CATIA Human Engineering Analysis module, this paper established the human body 3-D model, analyzed the eligibility of the hold and the extend for the racing wheelchair, analyzed and evaluated the comfort of three typical sports postures of human body.
The Establishment of the Human Body Model The human body model is established based on human body parameters, it is an effective tool which describes morphological characteristics and mechanical properties of human body, it is also an indispensable auxiliary tool that can be used to research, analyze, evaluate, and test the man-machine system.
The reasonable human movement postures could reach the requirement of the human force, the unreasonable ones could cause fatigue, evoke occupational diseases and affect the match result during to energy over-consumption.
In this paper, the upper limb of the 3-D human body for the racing wheelchair model had three sports postures, which contained: initial posture when driving the wheelchair, one of Middle postures when driving the wheelchair, and open posture of both arms when leaving the wheelchair, these three postures we edited are shown in Fig.6. 1) Initial posture 2) Middle posture 3) Open posture Fig.6 Three sports posture edit Because the comfort is a subjective feeling, that is the comprehensive feeling of pain, fatigue, and force and so on, which is influenced by various physiological factors such as the joint angle, muscle tissue pressure and blood circulation block.

Based on the above thinkig, since the 1980s, Architectural Design Institute of Northeast China, Zhejiang University,etc have made some preliminary discussions of the physical and mechanical properties of AAC and the seismic behavior of the block wall and the block masonry structure[1~7].
Vertical pressing stress impact Many domestic and abroad researches have shown that vertical pressing stressσ0 is one of the important factors that influence masonry shear strength.
The vertical pressing stress decides the masonry shear failure feature and also directly affects the masonry shear strength..
(3)The vertical pressing stress decided the masonry shear failure form and also directly affected the masonry shear strength.

The emergence of this phenomenon, in addition to the management, manufacturing quality products and promotions and other causes, one of the main reasons is that NC machine varieties, properties and structure of production in our country is not advanced, new product development cycle is long, which can not be timely according to the needs of users to provide satisfactory products.
But the overall scheme of machine tool in the traditional design often depends on the " wisdom ", randomness, become the key factors affecting the quality of the products, along with the development of CAD technology, computing technology and design methodology, and the need of market competition, must develop both based on knowledge, overall scheme and scientific analysis and prediction virtual design software
Structure design is in the overall layout of the program to determine the basic design, the main shape and size on the mechanical structure, the same analogy and generative design two.

., on the microstructure and mechanical properties of magnesium alloys.
The deformation behaviors and microstructures evolution were affected by the stresses states and strains distribution in the deformation zone.
The frictional factor was 0.4, poison ratio was 0.35, yield stress was 80MPa, and the tangent model was 5MPa.
If the twins can not propagate uniformly to other grains, deformation will concentrate to certain twin bands with high Schmid factor, and the twin bands will transform into shear bands which can lead to the fracture of matrix.
The stress states in the roll bite zone affected the behavior of twin nucleation, propagation and twin bands intersection behaviors.

As noticed by Wang et al. [6], the following difficulties inherent in the dynamic-based methods should be overcome: (1) there are many factors, e.g. stiffness, mass and damping affecting the precision of test data and numerical solutions.
Hence, most of the dynamic identification algorithms unavoidably assume that there is no damping and the damage will not cause the variation in mass. (2) For modal testing, it is usually difficult to obtain the obvious and accurate mode shapes on some stiff civil structures. (3) Some methods, which detect damages through the changes of stiffness properties of structures, require the high-orders of modal data that are difficult to be obtained accurately.
Mechanical Systems and Signal Processing, 18(6) (2004), p. 1381-1399

Table 1 Mechanical property of roof and floor of 10 rock formation Position Rock property E 104Mpa ν σb /Mpa RM /Mpa σc /Mpa Pressure plate /Mpa Roof Mudstone 1.00 0.16 6.7 0.8 3.2 \ Floor Mudstone 3.20 0.31 7.6 1.2 5.6 1.55 During mining in working face, by conventional mine pressure observation method , “the three volume”, roof and floor and the characteristics of deformation and damage of coal seam were observed and analyzed.
Soft strata has good flexibility ,is easy to bend ,the caving is quite different from caving in hard strata, the caving height is not only affected by the mining height, but also affected by the advance speed ,supporting intensity factors.

Mechanical properties of titanium alloys are strongly interlinked with their microstructures developed during thermomechanical processing and final heat treatments [10].
Step cooling in furnace was affecting the growth of α lamellas and precipitating secondary α-platelets.
Elshaer, Microstructure and mechanical properties of cast and heat treated Ti−6.55Al−3.41Mo−1.77Zr alloy, Transactions of Nonferrous Metals Society of China, vol. 23, (2013), pp. 3517-3524
Zeng, Crack initiation and mechanical properties of TC21 titanium alloy with equiaxed microstructure, Materials Science & Engineering A, vol. 586, (2013), pp. 215-222
Yao, Microstructure and mechanical properties of TC21 titanium alloy by near-isothermal forging, Transactions of Nonferrous Metals Society of China, vol. 25, (2015), pp. 72-79

Fatigue is influenced by numerous factors such as the type of stresses, environment, temperature, etc.
These factors bring complexity in fatigue life prediction.
Concentration would be more on the mechanical properties of the human teeth, and so the data gotten would be based on some of the mechanical properties of the teeth.
Yu, “Review of research on the mechanical properties of the human tooth,” Int.
[24] “Mechanical Properties of Dental Materials | Pocket Dentistry.”

Nerve growth factor receptor (NGFR) p75 were applied to identify OECs by immunostaining.
OECs could secret various neurotrophic factors and signal molecules, such as brain-derived neurotrophic factor (BDNF), nerve growth factor (NGF), glia cell line-derived neurotrophic factor (GDNF) and NT-4/5 [4], which could imposed on the microenvironment.
The nanofibers orientation in SF tube affects the mechanical property of SF tube.
In order to get an intuitive and three-dimensional cell morphology, SEM was applied to observe the adhesion and spreading properties of OECs on different materials. samples were rinsed with PBS for three times and respectively fixed in 4% glutaraldehyde and 1% osmic acid for 1h.