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Introduction Risk caused by uncertain factors, because of the large scale construction project, cycle is long, numerous participants and complex technology, causing the effect of the uncertain factors on the construction project is more outstanding, risk and multiplication, so you need to implement effective risk management to reduce the risk or reduce the risk of losses, to ensure the project to reach the expected aim [1].
High-rise housing construction project construction safety risk identification In high-rise building construction engineering is used to identify the risks of the construction process, should follow the scientific risk identification procedures, as shown in Fig 1: Information collecting Determine the risk events and their consequences Classified risk factors Compile the risk list Fig.1 The flow chart of risk identification Common high-rise housing construction project construction safety risk High-rise housing construction project construction safety accident form varied, according to statistics, in recent years, the main forms of safety accidents have a fall, objects, mechanical damage, collapse, electric shock, fire, etc., concrete as shown in Fig.2.
Machinery and equipment aging or slight fault, still run use caused by mechanical equipment parts or fly out of a material d.
People throw waste cuts 3) machine, and crane accidents used in high-rise building construction is a great variety of mechanical equipment, such as excavators, cranes, processing machinery, power rotation device and derrick, etc., the site of the project construction conditions, related professional technology will affect the normal use, in the process of operation will be affected by any carelessness caused casualties. 4) to get an electric shock accident high-rise housing construction project construction site has a large number of electrical machinery and equipment and power lines, live electricity environment is relatively poor, hard to avoid because of the rain, water splash, wind and other adverse conditions cause electrical equipment failure, leakage phenomenon, causing accidents and the lack of electricity safety distance, illegal operation, safety electricity management system is lax, etc are the main factors of electric shock injuries.
The grey comprehensive evaluation method.In 1982, professor Deng Julong first put forward the grey system theory (GST) [6], in grey theory, black said the unknown information, white said known information, gray says part of the information known, some information is unknown, its core idea is: make the most of constitute the original data matrix, after transformation and bleaching to get more information, so as to explain the purpose of the evaluation object properties [6].

However, the main problem with the admixed powder is on the affected final density and mechanical properties [10].
This is because of the dynamic material properties of the sample during sintering.
A number of factors influenced the deviations between samples with the same lubricant.
Forno, “Influence of processing parameters on the mechanical properties of Electro-Sinter-Forged iron based powders,” Jmade, vol. 93, pp. 458–466, 2016
Larsson, “Tribological Properties of Lubricants Used in PM Process.”

As part of the research project, this paper gives the supplement study of the mix proportion and basic properties of C50 fair-faced concrete, and summarizes the experimental results of the apparent quality of C30 and C50 fair-faced concrete affected by the mold releases.
As affected by multi-factors of concrete itself and external conditions, the apparent quality of fair-faced concrete relied in a large extent on the transparent painting [4-6], it is necessary to develop the technology making fair-faced concrete to an idealized level.
Their properties were introduced at earlier published paper [7].
As the requirement of real urban bridge construction, to find out the suitable mix proportion and verify the basic properties of C50 fair-faced concrete, eleven mix proportions of concrete were designed as list in Table 1.
[9] GB/T 50081-2002: Standard for Test Method of Mechanical Properties on Ordinary Concrete (China Building Industry Press, Beijing, 2002)

Additionally, this study seeks to determine the optimal 3D printing parameters that balance mechanical integrity, biocompatibility and degradation properties.
The selected parameters included nozzle temperature, printing speed, layer height and printing orientation, as these factors significantly influence print quality and structural fidelity.
One possible explanation is that different orientations alter the way layers are deposited and bonded, affecting how heat is retained or dissipated during printing [16].
A review on coronary artery disease, its risk factors, and therapeutics.
Printing parameter optimization of PLA material concerning geometrical accuracy and tensile properties relative to FDM process productivity.

Prediction of surface fracture of 6061 Al processed by equal-channel angular pressing Qing Zhou1, a, Wenjie Chen1,b , Jun Xu1,c and Yupeng Duan1 1College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, No. 29, Yudao St., Nanjing, Jiangsu Province, China, 210016 aanzhouqing@nuaa.edu.cn, bcwj048@163.com, cxujun621@126.com Keywords: Equal-channel angular pressing; fracture; mechanical properties; Cockcroft and Latham criterion; 6061 Al Abstract.
Although these studies offer promising results, comprehensively investigating the fractures that form during multi-pass ECAP is necessary to maximise ECAP workability, improve ECAP efficiency, and understand the damage mechanism of ECAP-processed materials. 6061 Al is an aluminium alloy that has been extensively used in ECAP processing to realise ultrafine grain sizes (e.g. [7]) and improve mechanical properties (e.g. [8]).
After ECAP, the tensile properties and the cross-section hardness of the ECAP bars were tested.
The damage factors were large and concentrated at the upper and lower parts of the samples(Fig. 3).
The maximum damage factors were almost inversely proportional to the applied back-pressure (Fig. 4).

Foitzik1 1 TH Wildau, Institut for Applied Bioscience, Hochschulring 1, 15745 Wildau, Germany 2 Department of Industrial Engineering, University of Rome “Tor Vergata”, 00133 Rome, Italy Via del Politecnico, 1, 00133 Rome, Italy Keywords: ESPI, Ferro Fluids, Nanoparticles, HeLa, Detection of Displacement Abstract The determination of mechanical properties can provide insight into complex biochemical processes such as the cell cycle and even the progression of diseases.
Several applications have been developed to analyze the linkages between mechanical properties and the cellular state.
Results One important factors which influences the deformation is the applied time of excitation.
As seen in figure 6, a refraction artifact affects all obtained results.
Mechanical models for living cells - a review.

Because the functional properties are effected it significantly affects load-bearing and kinematic patterns on the lumbar spine [11].
But also environmental and genetic factors contribute to degeneration of the disc and its ultimate mechanical failure [12, 13, 14].
These three factors influence each other.
Figure 9 shows the table of material properties.
[23] S Asano, K Kaneda, S Umehara., The mechanical properties of the human L4-5 functional spinal unit during cyclic loading.

Thermophysical Properties.
The basic thermophysical properties are shown in Table 1.
The density is one of most relevant parameters of thermo-physical properties, which can determine the zone of Soft Reduction in the range of possibilities.
Table 1 The list of thermophysical properties.
(3) The soft reduction and other factors together will affect the solidification process, the mechanism is very complex and other further works needs to do.

The resulting model allows us to quantify the influence of rheological factors on the completeness of the water-oil displacement and to calculate the performance, taking into account the component composition of the hydrocarbon phases.
Taking the Samara Region oil fields as an example, the article shows that the quality of design is unsatisfactory when the bundled software being used does not take into account specific non-Newtonian properties of the high-viscosity oil.
Any high-viscosity oil has structural and mechanical properties and behaves as a non-Newtonian fluid, depending on the concentration of high molecular substances, the component analysis of casing head gas, permeability and temperature.
An unfavourable combination of these factors leads to an increase in viscosity, deceleration of the oil filtration rate, and the progressive bed water influx.
This means that in a certain range of pressure gradients, the rates of water influx will be actively influenced by the viscoplastic properties of the oil along with the rock filtration properties.

Regulation of Mechanical Properties of Advanced PCM Products with the Aid of Catalysts I.V.
Recently, during manufacturing products from PCM, there are various ways to reduce the influence of these factors: assembly of parts by gluing together several prefabricated thin-walled parts, using double-sided heating during molding, controlling heating modes and time of the part exposure (step heating).
Therefore, the change in flexural strength allows us to estimate the effect of the temperature gradient on the mechanical properties of the matrix [2, 3,11].
Reducing the anisotropy of the physical-mechanical properties of the matrix helps to reduce internal stresses in parts made of PCM, also it reduces distortion of parts due to the effect of residual stresses.
Golovkin et al, Polymeric composite materials: structure, properties, technology: studies manual, St.