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Ferric nitrate could greatly improve the ability of bio-treatment properties for sediment.
Due to various mechanical, physical, chemical and biological processes the phosphorus from these particles can be released into the water again.
The change of redox potential in sediments was one of the most important factors controlling P mobility.
Hence, it follows that after the addition of nitrate; the nitrate should be used as an electron acceptor and greatly improved the ability of bio-treatment properties of sediment.
It can greatly improve the ability of bio-treatment properties for sediment.

In particular, the frictional behavior between the sheet metals affects the geometrical formation of the clinched joint significantly.
Since the test setup is one of the instrumented tests, an independent consideration of the influencing factors is possible.
Furthermore, the occurring friction is influenced by various factors that are relevant in forming processes, for example contact pressure, relative speed, temperature and surface change due to abrasion or adhesion wear.
A separation of the specimens using machine cutting processes, wire erosion or water jet cutting is not reasonable, as this processes use cooling lubricants or other media, which may change the surface condition or friction properties.
Numerical simulation was used to determine the properties of such a mounting.

Mechanism Description Quantitative Contribution Factors Affecting Contribution Examples Ion Exchange Exchange metal ions with cations (e.g., Na⁺, K⁺) on the adsorbent surface. 30-50% of total HM removal, depending on functional groups.
Functional groups' availability, metal ion properties.
When incorporated into the synthesis process, the size of MNPs can be tuned to the nanoscale to improve the final composite's chemical reactivity and mechanical properties, as shown in Table 3.
Competitor ions decrease adsorption efficiency by occupying the active sites or changing the surface properties, affecting the nanocomposites' performance.
However, factors such as agglomeration, leaching of functional groups and volatile synthesis volumes significantly affect their effectiveness.

Poor applicability of traditional processing technology, difficult to process and high processing costs affect the overall growth of the using of Nomex honeycomb material [4].
With the Nomex honeycomb composite material properties, this paper proposed the NC cutting method based on ultrasonic vibration, analyzed the curved surface forming principle and established an error analysis model.
The basic principle of ultrasonic cutting is to use an electronic ultrasonic generator, which first creates an ultrasound with the frequency 20~30kHz, then the ultrasonic-mechanical converter placed inside the ultrasonic cutting head converts the ultrasonic vibration with weak amplitude and energy into mechanical vibration of same frequency, and the resonance amplifier gets amplitude and energy that is strong enough and can meet the requirements of cutting parts, finally transfers to the cutting tool placed on the top of the ultrasonic cutting head for the cutting process of composite material.
Tool path generation is by the parts geometry model, to calculate the tool position and produce processing trajectory, according to the selected cutting machine, cutting tool, feed method, mechanical allowance and other factors.
Hong Soon H:Mechanical behavior and failure process during compressive of honeycomb composite at elevated temperatures.

Introduction Joints are the main influencing factor for the deformation, failure and instability of surrounding rocks.
Currently, few attempts have been done on the stability of tunnels affected by joint sets with different orientations and overburden pressures.
Without original state of strain energy, this elastic body is considered as an optimal material to simulate the actual behaviours of physical and mechanical properties of a geological body after diagenesis.
Studies shown the main cause of the deformation and failure of the tunnels are the mechanical performance of the shear slip and deformation of joints due to excavation and the overburden pressure.
Its mechanical essences are the continued deformation and the repeated failure of joints in varied stress field caused by excavation and overburden pressures.

To optimize the mechanical properties of alloys it is important to know the response of precipitates to thermomechanical treatments.
The nucleation rate J is expressed as      −=     −      ∆ − = t J t kT G NZJ S C τ τ β exp exp exp * * , (2) where Z is the Zeldovich factor, β* is the atomic attachment rate, NC is the number of potential nucleation sites, ∆G* is the critical nucleation energy, k is the Boltzmann constant, T is the absolute temperature, t is the time and τ is the incubation time.
The phase fraction of the M23C6 and Laves Phase is divided by a factor of ten to get a more concise diagram.
The M6C and MC carbides seem to be only weakly affected by the tempering treatment.

CaP surfaces were observed to present differing morphologies and roughness (Ra) values that depended on either mechanical preparation or the use of a sputter deposited underlying titanium metal layer.
These in vitro studies also showed cell response to be significantly affected by the presence of the titanium interlayer.
Employing RF magnetron sputtering to deposit coatings of sub-micron thickness implies that the underlying substrate topography is a critical factor in defining the nature of the deposited bioceramic layer.
Hence, key coating properties, and thereby the resultant biofunctionality, may be significantly influenced by both the choice of sputtering conditions and the nature of the underlying substrate surface.
Key properties, such as surface roughness and contact angle have been determined and correlated with the condition of the underlying native substrate.

Research on cutting vibration in high-speed milling nickel-base superalloy Can Zhao1,a*,Zibiao Wang1,b,Xuehui Wang1,Wang Xi1,Yangyang Shi1 1School of Mechanical Engineering, Heilongjiang University of Science Technology,NO.2468 PuyuanRoad, Harbin 150022, China azhaocan_hist@163.com,bbiao0529@sina.cn Keywords:Ceramics Tool; High-speed; Milling; Superalloy; Vibration Abstract: Nickel-base superalloy GH4169 is a kind of alloy with high intensity, heat-stability and heat-fatigability, so that is often used to aerospace field, but which has poor machinability.
But its processing manufacturability is poor, when using ceramic cutting tool in the process of high speed milling of GH4169 that was investigated with high cutting temperature, large deformation, strain hardening tendency, because of the intermittent cutting, large cutting force and vibration is intense, and the brittleness of ceramic cutting tool led to tool wear, seriously affect the service life of cutting tools, also can produce noise harm to operators which greatly limits the processing conditions and efficiency.
The cutting force most affected by the axial depth of cut, so that the vibration should be most affected by the axial depth of cut significantly.
GH4169 superalloy as workpiece material [4] (material properties are shown in Table 1), before processing the workpiece material through the solution and aging heat treatment, the testing process is the bottom of the workpiece clamping vise.
Tool selection model Salon cc6060 ceramic blade (specific parameters in Table 2), mounted on a 64mm diameter cutter head, cutter helix angle is zero, with the inclination of 6 °, when the milling tool and workpiece tangent feed, material removal from thin to thick, the tool can reduce the impact on the workpiece, climb the opposite, so I chose milling, GH4169 at 650 ℃, still has a high performance, while above 800 ℃, the material properties will be a sharp decline, while the high temperature ceramic tool in this still has good hardness, according to this critical point, in order to make the cutting process to produce high temperatures in the process of cutting a small amount of choice, high line speeds, dry cutting.

The bending angle depends on the input laser energy, the speed at which it traverses the sample width, as well as the mechanical and thermal properties of the material.
Experimental A series of test samples 200mm in length, 60mm in width and 8mm in thickness were cut from standard stock hot rolled mild steel flat bar (material composition and mechanical properties given in Table 1).
C Mn P S Si Al Chemical composition 0.22 max 1.6 max 0.04 max 0.05 max 0.5 max 0.1 Tensile Strength [MPa] Yield Strength [MPa] Hardness HV50 Elongation % Mechanical properties 450 (min) to 620 (max) Actual 300 (min) Actual Actual (160) 20 Table 2.
Through-thickness mapping of the microstructure indicates the cusp of the heat affected zone (HAZ) to be limited to the width of the laser beam [5].
This also creates conditions for dynamic recrystallization which in combination with phase transformation are the key factors leading to grain refinement.

The solved problem and the object of performed analyses The technical issue solved in this paper is the investigation of the effects and the factors that led to permanent plastic deformation and occurrence of cracking in the structure of the locomotive, the excessive deterioration of the axle gripping, the drive mechanisms and the braking systems of the shunting locomotive.
Later, it turned out, that the used drive systems, braking and wagon interconnection significantly affected the movement of the whole set and were one of the major sources of potential problems.
They represented significant technical risk factors causing progressive damage of observed critical elements of the locomotive and the source of the technical problems that have arisen.
The determining fact was the knowledge that under experimental measurements it was not possible to perform a deeper analysis of the effects of the particular parameters on the dynamic properties of the system such as: · size of braking force, · clearance in the couplers, · train set speed before braking and others.
This will cause the decrease of shocks and shift at mechanical braking.