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Online since: January 2021
Authors: Jin Chang Ning
In the continuous distribution area of mobile sand dunes in the hinterland of Taklimakan Desert, pure Aeolian sand is adopted at the upper part of the mobile sand dunes with a height of about 15m in the composite longitudinal sand ridges, with the number a (geographic coordinates of the sampling point: N39º17'26.2 ",E83º46'29.4").
On the edge of the desert where mobile dunes are scattered or partially distributed in patches, in the now dried-up ancient river course and in the woodland where Populus euphratica is sparsely growing, silty extremely fine sand due to river siltation (called silty soil in some literatures) is adopted and separated by sieving. only the part less than <0.075mm is used in the test, and the number is z (geographic coordinates of sampling point: N40º49'06.1",E84º17'48.2").
It can be seen that: 1) The relative positions and changing trends of the Surface vibration compaction curve and the Heavy compaction curve are quite consistent, mainly shown in: ①When the content of the Powder clay is less, such as 16.3%, 20%, 25%, 30%, 35%, the gradation of the sample is improved with the increase of the content of the Powder clay, and the increased powder clay is mainly filled in the pores between the sand grains, so that the compaction density is obviously improved on the whole ...
On the edge of the desert where mobile dunes are scattered or partially distributed in patches, in the now dried-up ancient river course and in the woodland where Populus euphratica is sparsely growing, silty extremely fine sand due to river siltation (called silty soil in some literatures) is adopted and separated by sieving. only the part less than <0.075mm is used in the test, and the number is z (geographic coordinates of sampling point: N40º49'06.1",E84º17'48.2").
It can be seen that: 1) The relative positions and changing trends of the Surface vibration compaction curve and the Heavy compaction curve are quite consistent, mainly shown in: ①When the content of the Powder clay is less, such as 16.3%, 20%, 25%, 30%, 35%, the gradation of the sample is improved with the increase of the content of the Powder clay, and the increased powder clay is mainly filled in the pores between the sand grains, so that the compaction density is obviously improved on the whole ...
Online since: November 2015
Authors: S.N. Grigoriev
If the substrate is fed with pulses of 20 μs and an amplitude of 30 kV with a repetition rate of 25 Hz, deposits a dark purple nanocomposite coating with the width of the interface noticeably greater than 1 μm, and a hardness of 5000 HV, consisting of grains of TiN and Ti2N (more recent) with sizes less than 10 nm.
It can amount to hundreds of electron volts, and this electron can form inside the chamber the number of ions Nε = εо/W, where W is the cost of gas ionization.
When λN > a, the number n of ions formed in the trap of fast electrons created by ionization of gas in the cathode layer by one electron emitted by the cathode, equals to n = C(d/a)N2, (5) where N = eUc/W– the maximum number of ions formed by the one cathode emitted electron, and the coefficient C depends on N and linearly increases from C = 0.2 for N = 10 to C = 0.36 for N = 20 and C = 0.5 for N = 30.
In this case, the number of ions formed by them is less than N, and to keep the magnitude of the discharge current is necessary, increasing the cathode drop Uc, to increase the width d and the volume of the cathode layer, and hence the number n of ions formed by fast electrons from the layer.
Therefore, the number of ions turning into the fast molecules in the layer 16 is negligible.
It can amount to hundreds of electron volts, and this electron can form inside the chamber the number of ions Nε = εо/W, where W is the cost of gas ionization.
When λN > a, the number n of ions formed in the trap of fast electrons created by ionization of gas in the cathode layer by one electron emitted by the cathode, equals to n = C(d/a)N2, (5) where N = eUc/W– the maximum number of ions formed by the one cathode emitted electron, and the coefficient C depends on N and linearly increases from C = 0.2 for N = 10 to C = 0.36 for N = 20 and C = 0.5 for N = 30.
In this case, the number of ions formed by them is less than N, and to keep the magnitude of the discharge current is necessary, increasing the cathode drop Uc, to increase the width d and the volume of the cathode layer, and hence the number n of ions formed by fast electrons from the layer.
Therefore, the number of ions turning into the fast molecules in the layer 16 is negligible.
Online since: December 2022
Authors: Mohammad Smadi, Omar Bataineh
The reduction in impact toughness shown in the same figure was likely due to the amount of precipitation that occurred is not high which leads to fractures, shiny, and grains became more brittle.
Different epoch numbers with ranges between 500 and 100000 data points were tested to investigate the error dependence on the number of epochs used.
It can be seen from this figure that at epoch number 40,000, RMSE reaches a steady state value at a minimum of less than 0.05.
Each model's hidden layer's number was 5,3,1; training time equal 50,000, and other parameters were set to default.
` Fig. 8: Iteration number against Root mean square error.
Different epoch numbers with ranges between 500 and 100000 data points were tested to investigate the error dependence on the number of epochs used.
It can be seen from this figure that at epoch number 40,000, RMSE reaches a steady state value at a minimum of less than 0.05.
Each model's hidden layer's number was 5,3,1; training time equal 50,000, and other parameters were set to default.
` Fig. 8: Iteration number against Root mean square error.
Online since: December 2011
Authors: Qi Hong Zhu, Hong Xia Xia
At the same time, the number of the withered leaves in group C is also increased.
On the eighth day, the leaves in group A begin to be withered and the number of withered leaves in group B and group C is also increased.
In the following days, the number of dead plants will be increased as time goes on.
A great number of radicals have been accumulated and the content of the membranous peroxidation products has been increased.
Nan Ming,Wang Hanning,Zhang Jinwen,etal Effects of low-temperature on physiological and biochemical indexes in different grain types of maize seeds[J].Journal of Gansu Agricultural University, 45(6) (2010) 71~74 [25].
On the eighth day, the leaves in group A begin to be withered and the number of withered leaves in group B and group C is also increased.
In the following days, the number of dead plants will be increased as time goes on.
A great number of radicals have been accumulated and the content of the membranous peroxidation products has been increased.
Nan Ming,Wang Hanning,Zhang Jinwen,etal Effects of low-temperature on physiological and biochemical indexes in different grain types of maize seeds[J].Journal of Gansu Agricultural University, 45(6) (2010) 71~74 [25].
Online since: July 2007
Authors: Marios Tsezos
Microbial cell surface
and internal organelles offer a large number of active functional groups and possible physicochemical
mechanisms of interaction (e.g. complexation, coordination, chelation, ion exchange,
adsorption, microprecipitation, reduction-oxidation) with soluble metal and metalloid species, [10].
Describing biosorption as a set of chemical reactions of metal species with the cell functional groups, although gives better mechanistic approach to the phenomenon, has a drawback due to the fact that the number of the functional groups are not discrete and the metal - functional group stability constants are rarely known accurately.
The operation of the filter is based on the fact that sand grains act as support carrier material for biomass immobilisation.
Describing biosorption as a set of chemical reactions of metal species with the cell functional groups, although gives better mechanistic approach to the phenomenon, has a drawback due to the fact that the number of the functional groups are not discrete and the metal - functional group stability constants are rarely known accurately.
The operation of the filter is based on the fact that sand grains act as support carrier material for biomass immobilisation.
Online since: February 2012
Authors: Wolfgang Staufner, Daniel Wortberg, Andreas Magnus Sulzberger, Marion Merklein
The increasing number of new lightweight materials, both non-metallic as well as metallic, increasingly support the trend toward lightweight construction.
With this new method a lot of complex aluminum parts can be realized in high numbers.
Merklein: Enhanced Formability of Ultrafine-Grained Aluminium Blanks by Local Heat Treatments.
With this new method a lot of complex aluminum parts can be realized in high numbers.
Merklein: Enhanced Formability of Ultrafine-Grained Aluminium Blanks by Local Heat Treatments.
Online since: September 2011
Authors: Veluswamy Muthuraman, Raju Ramakrishnan
But the full potential utilization of this process is not completely solved because of its complex stochastic nature and more number of variables involved in this operation.
The dry friction and wear behavior of WC–Co cemented carbides, exhibiting 6 to 12 wt. % cobalt as binder phase and average carbide grain sizes ranging from 0.3 up to 2.2 μm, combined with various surface finishing variants of WEDM, was evaluated by performing linearly reciprocating pin-on-flat sliding experiments against WC–Co cemented carbide using normal contact loads of 15 N up to 35 N and a sliding velocity of 0.3 m/s [8].In this present study an artificial neural network (ANN) model was developed, to predict the performance characteristics of WEDM process when machining WC-Co composite, since this is one of the frequently machined material for the tool and die application and to obtain the complex shapes, usage of WEDM is advisable.
E (MSE) = å E (p) (8) Results and Discussion The four critical learning parameters of neural network, namely the training cycle, number of neurons in the hidden layer, learning rate, and the momentum factor, are selected as the control factors.
The dry friction and wear behavior of WC–Co cemented carbides, exhibiting 6 to 12 wt. % cobalt as binder phase and average carbide grain sizes ranging from 0.3 up to 2.2 μm, combined with various surface finishing variants of WEDM, was evaluated by performing linearly reciprocating pin-on-flat sliding experiments against WC–Co cemented carbide using normal contact loads of 15 N up to 35 N and a sliding velocity of 0.3 m/s [8].In this present study an artificial neural network (ANN) model was developed, to predict the performance characteristics of WEDM process when machining WC-Co composite, since this is one of the frequently machined material for the tool and die application and to obtain the complex shapes, usage of WEDM is advisable.
E (MSE) = å E (p) (8) Results and Discussion The four critical learning parameters of neural network, namely the training cycle, number of neurons in the hidden layer, learning rate, and the momentum factor, are selected as the control factors.
Online since: August 2013
Authors: Zhong Zong
Virtual domain combinatorial double auction can not only easily solving the problem of the monopolistic advantages in the one-way auction, but also reducing the number of transactions and transaction costs in the two-way auction of items with one single attribute.
3.1 Building combinatorial auction trust based on the virtual domain
In each virtual domain, there is a grid resource auctioneer.
To the resource customer, when the supply of one resource grows in number, then reduces the quoted price.
Construction of Peer-to-Peer Multiple-Grain Trust Model[J].
To the resource customer, when the supply of one resource grows in number, then reduces the quoted price.
Construction of Peer-to-Peer Multiple-Grain Trust Model[J].
Online since: March 2020
Authors: S.K. Kargapol’tsev, V.I. Shastin
From the practical perspective, the “melting” mode is inexpedient for this type of mating, as it becomes necessary to restore the surface state by honing and removing a significant part of the nitrided layer, since at the same time the number of permissible cylinder repairs is reduced.
It is known that with a decrease in grain size and an increase in the level of dispersion (amorphization), for most iron-carbon alloys, the friction coefficient decreases and the bearing capacity of the modified layer increases, the breaking-in period decreases [8–10].
Based on these provisions, one can formulate a number of important structural and technological recommendations both in the production and in the repair of the studied CPG elements.
It is known that with a decrease in grain size and an increase in the level of dispersion (amorphization), for most iron-carbon alloys, the friction coefficient decreases and the bearing capacity of the modified layer increases, the breaking-in period decreases [8–10].
Based on these provisions, one can formulate a number of important structural and technological recommendations both in the production and in the repair of the studied CPG elements.
Online since: November 2012
Authors: Chi Li, Jing Jing Zhang, Li Ping Gao
There have been a large number of research results on the mechanical responses of the Pavement-subgrade system under vehicle load.
In this figure, the down arrow shows the action point of the wheel load and the letter stand for horizontal node number.
[2] Malla, Ramesh B.; Joshi, Shraddha: Subgrade resilient modulus prediction models for coarse and fine-grained soils based on long-term pavement performance data[J].
In this figure, the down arrow shows the action point of the wheel load and the letter stand for horizontal node number.
[2] Malla, Ramesh B.; Joshi, Shraddha: Subgrade resilient modulus prediction models for coarse and fine-grained soils based on long-term pavement performance data[J].