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Online since: July 2014
Authors: Cheng Liu
With social variables equal in the two communities, the influence of the environmental configuration is then implicated to some extent as a causal factor to explain the differing crime rates in the two communities.
There is little doubt that areas affect people as well as people affecting areas.
By incorporating seating areas, picnic areas, porches and other amenities in open spaces, the legitimate users will participate in the activity and maintain ownership of the property.
Security lighting Lighting is an important factor in controlling crime.
There are much more effective ways to ensure safety, such as caring neighbors who watch out for your property.
There is little doubt that areas affect people as well as people affecting areas.
By incorporating seating areas, picnic areas, porches and other amenities in open spaces, the legitimate users will participate in the activity and maintain ownership of the property.
Security lighting Lighting is an important factor in controlling crime.
There are much more effective ways to ensure safety, such as caring neighbors who watch out for your property.
Online since: October 2007
Authors: Günter Gottstein, Dmitri A. Molodov, Sheila Bhaumik, Xenia Molodova
However, recent experiments
revealed that the impact of a magnetic field is not confined to magnetically anisotropic metals
but can also be observed in a material with magnetically isotropic properties.
According to the classical JMAK model of recrystallization [14-16] for homogeneous nucleation at a constant rate and isotropic nucleus growth the recrystallization time can be written as 1 1 4 4 v 3 N R 3 0 0 Q 3Q 3 t Nv exp 3 N v 4kT − + π = = ⋅ π & & & (1) where N& and v are the rates of nucleation and nucleus growth, NQ& and vQ are the activation enthalpies of nucleation and nucleus growth, 0N& and 0v are the respective preexponential factors.
It is unlikely that the nucleation rate can be affected by an external magnetic field, since in particle containing Al-alloys nucleation is site saturated, i.e. occurs at particles at the very beginning of recrystallization.
It is known, however, that a magnetic field can induce the motion of dislocations without any external mechanical stress [17, 18].
Therefore, it is reasonable to assume that also the mobility of grain boundaries can be affected by a magnetic field.
According to the classical JMAK model of recrystallization [14-16] for homogeneous nucleation at a constant rate and isotropic nucleus growth the recrystallization time can be written as 1 1 4 4 v 3 N R 3 0 0 Q 3Q 3 t Nv exp 3 N v 4kT − + π = = ⋅ π & & & (1) where N& and v are the rates of nucleation and nucleus growth, NQ& and vQ are the activation enthalpies of nucleation and nucleus growth, 0N& and 0v are the respective preexponential factors.
It is unlikely that the nucleation rate can be affected by an external magnetic field, since in particle containing Al-alloys nucleation is site saturated, i.e. occurs at particles at the very beginning of recrystallization.
It is known, however, that a magnetic field can induce the motion of dislocations without any external mechanical stress [17, 18].
Therefore, it is reasonable to assume that also the mobility of grain boundaries can be affected by a magnetic field.
Online since: October 2015
Authors: Natalino Gattesco, Ingrid Boem
The mechanical characteristics of the GFRP wires and of the connectors are summarized in Table 1.
A material safety factor equal to γM = 1.0 was considered for the global seismic analysis of the building.
Plastic hinge properties.
The mechanical properties of URM are in agreement with the values for existing masonry reported in table C8A.2.1 of the Italian Recommendations “Circolare 2 febbraio 2009, n. 617” [25], annex of the Italian building code [26].
On the compressive strengths, it is assumed that the reinforcement does not affect these parameters, as evidenced in some preliminary tests carried out by the authors.
A material safety factor equal to γM = 1.0 was considered for the global seismic analysis of the building.
Plastic hinge properties.
The mechanical properties of URM are in agreement with the values for existing masonry reported in table C8A.2.1 of the Italian Recommendations “Circolare 2 febbraio 2009, n. 617” [25], annex of the Italian building code [26].
On the compressive strengths, it is assumed that the reinforcement does not affect these parameters, as evidenced in some preliminary tests carried out by the authors.
Online since: May 2023
Authors: Satyendra N. Shukla, Pratiksha Gaur, Ripul Mehrotra
Some of the characterization techniques that were used extensively to study MOF properties are discussed here.
4.1.
Through powder XRD, the network structure and crystalline properties of any material are described.
The DFT models (Density Functional Theory) were used to analyze these pore properties [46]. 4.4.
While in some cases, O2 was used to study the oxidative properties of MOFs.
Yallur, (2022) Synthesis, Structural and Optical Properties of Co Doped Sm2O3 Nanostructures.
Through powder XRD, the network structure and crystalline properties of any material are described.
The DFT models (Density Functional Theory) were used to analyze these pore properties [46]. 4.4.
While in some cases, O2 was used to study the oxidative properties of MOFs.
Yallur, (2022) Synthesis, Structural and Optical Properties of Co Doped Sm2O3 Nanostructures.
Online since: April 2016
Authors: Jie Chen, Yong Liu
Backfilling materials and the aggregate in cemented filling material is mainly river sand and mud, and by the pipe gravity or pump pressure to underground stope, so aggregate contains a certain amount of mud on the rheological properties of the transmission.
Reference [1] Henghu Sun, Jiang Linhua,etc.High water consolidated filling mining [M].Beijing:mechanical industry press,1998:1-12
Properties of concrete incorporating fly ash and ground granulated blast-furnace slag[J].
Mechanical properties of paste filling material is the first step of the experiment [J].
Strength of paste filling material is impact factor analysis[J].
Reference [1] Henghu Sun, Jiang Linhua,etc.High water consolidated filling mining [M].Beijing:mechanical industry press,1998:1-12
Properties of concrete incorporating fly ash and ground granulated blast-furnace slag[J].
Mechanical properties of paste filling material is the first step of the experiment [J].
Strength of paste filling material is impact factor analysis[J].
Online since: May 2006
Authors: Junji Ikeda, Takefumi Nakanishi, Giuseppe Pezzotti
Especially,
alumina/alumina total hip arthroplasty has shown its very low-wear property.
Therefore, it is possible to control the residual stress in the alumina matrix, which strongly influences the mechanical properties, by controlling grain size, or in turn, by sintering temperature.
The change in the residual stress field of the alumina matrix and in grain size with changing sintering temperature did not affect phase stability under water vapor conditions.
Transformation toughening was one of the factors contributing to better wear resistance of JMM-ZTA in Pin-on-Flat wear test under high load condition.
Therefore, it is possible to control the residual stress in the alumina matrix, which strongly influences the mechanical properties, by controlling grain size, or in turn, by sintering temperature.
The change in the residual stress field of the alumina matrix and in grain size with changing sintering temperature did not affect phase stability under water vapor conditions.
Transformation toughening was one of the factors contributing to better wear resistance of JMM-ZTA in Pin-on-Flat wear test under high load condition.
Online since: June 2015
Authors: Li Jun Fang, Tong Cao, Hong Kun Liu, Chang Li
Thermogravimetric Experimental Study on Combustion Performance of Co-firing of Sludge, Coal and Biomass in Micro-oxygen-rich Environment
Lijun FANG, Tong CAO*, Hongkun LIU , Chang LI
College of Energy Power and Mechanical Engineering, North China Electric Power University, Baoding Hebei China, 071003
fanglijun2009@163.com, caotong2014@163.com
240019597@qq.com,1024248550@qq.com
Keywords: Sludge/Coal/Biomass; Micro-oxygen enrichment environment; Co-firing; Thermogravimetric analysis method
Abstract.
The caloric value from high to low ranks for lignite, biomass, sludge and can preliminarily forecast that sludge is easier to burn, but not burn completely and its combustion products may affect the combustion performance of mixed samples.
So the activation energy can be obtained by the slope and frequency factor can be obtained by the intercept.
There may be many reasons: Simplifying the reaction mechanism formula when calculating the activation energy, using a first-order reaction, but the actual reaction mechanism is very complex, the first order reaction not enough to fully response dynamic characteristics of sample; The activity different of sludge and coal and biomass in each main temperature range, the interaction between the various components, calculating the activation energy by using the whole temperature range , this affecting the accuracy of activation energy; compared to combustion reaction in the air, the mutual impact between the components increasing and the mutual independence decreasing because of the change of oxygen concentration in micro-oxygen-rich environment, thus affecting the reactivity of the sample.
Combustion of sludge coal water slurry and emission property of contaminants, J.
The caloric value from high to low ranks for lignite, biomass, sludge and can preliminarily forecast that sludge is easier to burn, but not burn completely and its combustion products may affect the combustion performance of mixed samples.
So the activation energy can be obtained by the slope and frequency factor can be obtained by the intercept.
There may be many reasons: Simplifying the reaction mechanism formula when calculating the activation energy, using a first-order reaction, but the actual reaction mechanism is very complex, the first order reaction not enough to fully response dynamic characteristics of sample; The activity different of sludge and coal and biomass in each main temperature range, the interaction between the various components, calculating the activation energy by using the whole temperature range , this affecting the accuracy of activation energy; compared to combustion reaction in the air, the mutual impact between the components increasing and the mutual independence decreasing because of the change of oxygen concentration in micro-oxygen-rich environment, thus affecting the reactivity of the sample.
Combustion of sludge coal water slurry and emission property of contaminants, J.
Online since: September 2013
Authors: Kan Lai, Hua Zhang, Jun Lai, Yan Gao, Wei Shi
The traditional materials of firefighter uniform normally focus on the fire resistance property of the materials, so it mostly uses the fire resistance nature of the organic or high temperature resistant fiber, which normally contains aromatic or the stepped heterocyclic chain structure[1], and the fire resistance property, high temperature resistance property and physical and mechanical properties of fiber are excellent, but normally the spinnability and dyeing property is worse which cause the static problem serious during the production, so the manufacture cost is high.
The common textile fiber such as cotton, wool, silk, linen and synthetic fiber such as polyester, polyamide, polypropylene fiber, viscose, acrylic, etc, their nature high temperature resistance and fire resistance property is worse, but after the chemical modification or flame-proof treatment, these fibers are given the certain fire resistance property.
The additive amount of Aramid fiber 1414 into batts almost doesn’t affect on the heat stability, and due to the density of Langlun 1313 smaller compared with Langlun 1414 [6], in the condition of the same weight, the batts thickness decrease and heat stability also decrease with the additive amount of Aramid fiber 1414 increased.
The difference of the heat conductivity coefficient of Aramid fiber 1313 and Aramid fiber 1414 is too small, therefore, the batts integral structure becomes the most important factor that effect on the TTP value, means that the differences of the fiber construction manner and the static gas layer generated cause the TTP value changes.
(In Chinese) [6] Yan Liu, Yongjun Sun, Shiguang Liu: Discussion on Physical and Chemical Properties of Domestic Aramid Fibers. 6, 2005, p. 1-3.
The common textile fiber such as cotton, wool, silk, linen and synthetic fiber such as polyester, polyamide, polypropylene fiber, viscose, acrylic, etc, their nature high temperature resistance and fire resistance property is worse, but after the chemical modification or flame-proof treatment, these fibers are given the certain fire resistance property.
The additive amount of Aramid fiber 1414 into batts almost doesn’t affect on the heat stability, and due to the density of Langlun 1313 smaller compared with Langlun 1414 [6], in the condition of the same weight, the batts thickness decrease and heat stability also decrease with the additive amount of Aramid fiber 1414 increased.
The difference of the heat conductivity coefficient of Aramid fiber 1313 and Aramid fiber 1414 is too small, therefore, the batts integral structure becomes the most important factor that effect on the TTP value, means that the differences of the fiber construction manner and the static gas layer generated cause the TTP value changes.
(In Chinese) [6] Yan Liu, Yongjun Sun, Shiguang Liu: Discussion on Physical and Chemical Properties of Domestic Aramid Fibers. 6, 2005, p. 1-3.
Online since: October 2010
Authors: Wen Zhong Qu, Li Xiao, Qian Jin Wang
SEREP (System Equivalent Reduction-Expansion Process) method was used to
conduct the prediction research and the procedure was elaborated in detail theoretically first, then
several simulations were carried on to demonstrate the prediction procedure, inspect the accuracy
under various loads and investigate the factors which may influence the accuracy including the
number of modes used in the prediction, the noise, and the measured points.
Therefore, in the field of aerospace and mechanical engineering, structural vibration test is always considered as one of the most important means to verify that if the products or structures have good adaptability to the vibration environment, and to assess their dynamic performance.
As for the material property, Young's modulus E=70Gpa, Poisson's ratio ν=0.3, density ρ=2700 kg/ m3.In the element model (Fig 2(a)), 231 nodes and 200 elements were generated, S4R element type was used when calculated using the finite element software ABAQUS 6.9.
CASE 3 : the Noise Experimental noise is another important issue that could affect the successful implementation of the prediction algorithm.
Therefore, in the field of aerospace and mechanical engineering, structural vibration test is always considered as one of the most important means to verify that if the products or structures have good adaptability to the vibration environment, and to assess their dynamic performance.
As for the material property, Young's modulus E=70Gpa, Poisson's ratio ν=0.3, density ρ=2700 kg/ m3.In the element model (Fig 2(a)), 231 nodes and 200 elements were generated, S4R element type was used when calculated using the finite element software ABAQUS 6.9.
CASE 3 : the Noise Experimental noise is another important issue that could affect the successful implementation of the prediction algorithm.
Online since: September 2014
Authors: Jin Wang
So we should strengthen propaganda, first from the city area, eventually spread to the countryside.
1.2 Design of low level
The thermal comfort of residential building design is relatively backward, need to residential building design means learning developed area, the government promote the construction of energy-efficient design unit, but is not a complete set of low energy consumption and thermal comfort of residential design manual, or have some design atlas but not advanced enough, the main reason is the following two points, one is the northern Jiangsu area construction of higher learning quantity is less, and the intellectual property rights can not be protected, the architectural design of scientific research personnel enthusiasm is not high.
Expectation Building thermal environment of residential directly affect the comfort of occupants.
Green building through a variety of factors inside and outside space design of buildings, the material energy in the internal building ecological systematic circulation use, and obtain an efficient, low consumption, less waste, less pollution, ecological balance of the built environment.
Beijing: Mechanical Industry Press. 2005,p.48.
Expectation Building thermal environment of residential directly affect the comfort of occupants.
Green building through a variety of factors inside and outside space design of buildings, the material energy in the internal building ecological systematic circulation use, and obtain an efficient, low consumption, less waste, less pollution, ecological balance of the built environment.
Beijing: Mechanical Industry Press. 2005,p.48.