Search results

As a new type of detector material, the CdZnTe (CZT) crystal has the advantages such as a wide energy gap, a large average atomic number, the strong ability to stop X- ray and high resistivity.
It shows that there are dislocation and grain boundary defects near the interface, which may be due to the mechanical polishing on the CZT surface.

Assuming there are n students joined network test, then the difficulty of the i-th questions can be expressed as follows: (2) In formula (2), is the j-th student's score of the i-th question, Assuming the i-th question’s full score is assumed to 1, denoted as a correct answer, wrong answer recorded as 0, the formula (2) can be simplified as follows: (3) In formula (3), is the students’ number of the i-th questions answered correctly.
Perform the above-mentioned mutation probability calculations, create random numbers between [0, 1], compare it with the mutation probability, if the mutation probability is greater than the corresponding random number, perform the mutation operation.
Key Technologies Implementation 3.1 Database connection pool To solve the frequent allocation of resources, efficiency caused by the release, used the database connection pool technology, by setting the maximum number of connections the connection pool to prevent the system from endless establish a connection with the database.
Of particular importance is the connection pool management mechanism by monitoring the number of database connections usage, provided reference for system development and testing and performance tuning.
Fine-Grained Tournament Selection Operator in Genetic Algorithms.

Introduction The greatest number defects in seamless pipes production is formed at stage of piercing workpiece.
The number of mesh elements was 40,000, for a more accurate calculation of the shape change during cutting, a density window was created in direct cutting zone with a particle size ratio of 2, i.e. in this zone, size of the elements is 2 times smaller, therefore, their number is the same number of times larger.
The moment of intensive cutting workpiece is performed during the calculation steps numbered from 24 to 42.
Chodór, Modelling of guillotining process of grain oriented silicon steel using FEM, AIP Conference Proceedings. 2078 (2019) 020080

Two and four weeks after inoculation, in two out of four columns (one each sterile and biological), 1.2 g of finely ground NPR (<36 µm grain size) was dispersed evenly on top of the lignite.
Before the NPR addition and after 2, 4 and 10 weeks 1 g wet weight lignite was removed from the centre of the columns to quantify acidophilic iron-oxidizing, acidophilic sulfur-oxidizing prokaryotes, acidophilic and neutrophilic heterotrophs with the most probable number (MPN) technique [14].
NPR led concurrently to a reduction in the number of acidophilic iron oxidizers.
The number of sulfur-oxidizing acidophiles was also reduced due to addition of NPR, although their numbers were generally low.
The Most Probable Number Method and Its Uses in Enumeration, Qualification, and Validation, Journal of Validation Technology, Summer 2010.

And therefore it cannot be well used, resulting in a large number of accumulations, so it occupies space and pollutes the environment, and the titanium resources cannot be utilized.
While promoting perovskite grain growth, therefore it can be obtained titanium concentrate by beneficiation, and completed selective separation of enrichment phase perovskite.
And to some extent it adjusts the slag composition after smelting, thus a large number of slag can be effectively used, and the content of TiO2 in the residual is reduced.
Some technology can handle a large number of Ti-bearing blast furnace slag and is applied well, but due to not extract the valuable element titanium, the waste of titanium resources is caused.
Therefore, in order to search for the process of a low cost, not causing secondary pollution, high production efficiency and handling a large number of Ti-bearing blast furnace slag, further research is needed.

At present there are a large number of concepts, revealed a number of regularities connecting the material microstructure with its physical and mechanical properties.
To identify the grains boundaries and particles of carbide phases was applied chemical etching thin sections in 4 % alcohol solution of nitric acid (time of etching to 5-7 min.).
Two carbide types could be seen in the BS-mode image: very bright colored carbides containing higher-atomic-number elements and grey carbide containing lower-atomic-number element.
In other words, along with the tungsten and molybdenum atoms in М6С carbide can be up to 2/3 of iron atoms from the total number of metallic atoms.

Introduction With the rapid development of the automotive industry, the number of waste tires increased dramatically,so the processing of waste tires and other rubber products become an important problem for the sustainable development and environmental management.Admixing rubber into cement concrete,and it improves the toughness of concrete,noise and vibration reduction and shock resistance.Studies have shown that mixing rubber will lead to rapid decrease of concrete’s compressive,tensile and flexural strength [1].With the mixing of rubber, the compressive strength of concrete decreased, therefore, the rubber modified concrete has been put on the agenda.
The Manufacture And Maintenance Of Test Piece Count and metage the quantity of every materials,according to the mix proportion.put sand,cement,and rubber into agitator in proper order,stir in 60 seconds,then blend the water with water reducer,latex,tributyl phosphate,ethylene glycol slowly,stir in 30 seconds together,put breakstone into agitator last,stir in 120 seconds,after that,pour out the mixture and test slumps.water and other additive should be mixed well-distributed by velocity mixing,the slumps barrel should be wash clearly,stuff one third of the slumps barrel when stuffing everytime,in test.Test Piece for experiment is normal,adopt the method of stiring and jolt ramming by machine.according to (GB/T50081-2002)[4],after stuff the model,vibration close-grained to form concrete,take Test Piece into maintaining box, and then the form was removed after 24 hours, immediately moved then into the conservation of
Table1 Basic mechanics performance index of concrete Specimen number Rubber content（%） Compressive strength Tensile strength Flexural strength Strength (MPa) Increment (%) Strength (MPa) Increment (%) Strength (MPa) Increment (%) DC 0 60.35 14.1 5.25 15.6 7.53 21.0 MDC 68.88 6.07 9.11 NRC-A 5 55.42 11.5 4.86 14.8 7.27 17.3 MRC-A 61.79 5.58 8.53 NRC-B 52.84 9.1 4.77 10.9 7.05 18.4 MRC-B 57.63 5.29 8.35 NRC-A 10 49.61 10.3 4.49 15.1 6.83 21.4 MRC-A 54.74 5.17 8.29 NRC-B 46.92 10.5 4.31 14.8 6.52 23.9 MRC-B 51.83 4.95 8.08 NRC-A 15 46.45 7.4 4.29 14.7 6.57 21.2 MRC-A 49.88 4.92 7.96 NRC-B 43.07 10.4 4.03 17.9 6.22 24.9 MRC-B 47.53 4.75 7.77 NRC-A 20 40.79 12.3 3.88 20.9 6.05 25.5 MRC-A 45.81 4.69 7.59 NRC-B 39.02 13.4 3.76 21.8 5.92 24.5 MRC-B 44.25 4.58 7.37 The Performance of Tension and Compression Ratio The tension and compression ratio is a specific value of compressive strength and splitting tensile strength, The performance of tension
Fund 1 Liaoning Province Department of education project (Project Name: rubber modified cement concrete pavement performance study; the project number: L2012424); 2 Liaoning natural fund project (Project Name: road rubber modified experimental study; performance of concrete cement project number: 2013020087); 3 Shenyang Science and Technology Project (project Name: Crumb Rubber modified cement Concrete Pavement Performance application Technology); 4 in Liaoning province innovation teams in Higher Education Project (Project Name: environmental geotechnical engineering; project number: LT2012021).

., their researches is showed that the performance of metallized gel propellants is related to the amount and grain size of metal power added.
The critical Reynolds number of the Non-Newtonian fluids is provided by Dodge and Metzner and is described by [15]: (1) Where is the power law or rate index.
In the present works the critical Reynolds number is approximate to the value 2362, but the maximum Reynolds number is closed to the value 30, so the flowing process in cylindrical tubes is considered as laminar flow.
For a cylindrical coordinate system, based on the above assumptions (, , ) the continuity equation is given as: (2) The momentum conservation equations in the, and directions respectively, are described by: (3) (4) (5) Definition: the non-dimensional pressure, P, the Reynolds number, Re, the velocity components, νi, and the shear stress components, τij, are defined by: , , , Governing equation: (6) (7) (8) (9) Where r, z, θ are the cylindrical coordinate system orientation, ρ is the fluid density, Re is the Reynolds number.

The pore size is mainly between 10~30 µm and the average grain diameter is 20 µm.
Table 3 Number of live bacteria in different testing solution Testing solution Controls Filtrate Suspension The number of living bacteria[cfu·mL -1] 1.43×109 9.24×106 1.86×105 In order to investigate the antibacterial mechanism of Ag-antibacterial white carbon black containing lanthanum, 0.1 ml of bacterial liquid is inoculated in 15ml of nutrient agar (control sample), antibacterial material suspension and antibacterial material filtrate, respectively.
After culturing at 37°C for 24h, the number of survival bacteria is computed.
From Table 3, it can be seen clearly that the number of survival bacteria in antibacterial material filtrate is obviously decreased compared with that of control sample.
Furthermore, by comparing the numbers of survival bacteria between filtrate and suspension, in which the bacteriostasis power of suspension is stronger than that of filtrate, we can suggest that the contact antibacterial action was effective besides the stripping antibacterial action in the suspension, which indicates that the antibacterial mechanism of our materials can be proposed by the combination of stripping and contact antibacterial mechanism. 4 Conclusions The white carbon black carrier was prepared by the sol-gel method system, and the Ag-inorganic antibacterial material containing lanthanum was synthesized by adhering to Ag + and lanthanum nitrate on the white carbon black carrier under the certain condition.

They are: efficient request distribution, fine-grain load balancing, effective memory utilization, optimized processing of popular objects, and minimal network resource consumption in coordinating the web server nodes.
This is especially important to the dispatcher approach because the overhead in the Dispatcher limits the maximum number of requests that the cluster can accept.
The following are load metrics widely used: the number of tasks in the target running queue, target response time, the percentage of free memory, the percentage of free CPU time, the shifting rate of CPU contest, the average load in one minute, etc.
We use RSC but not commonly used current task number (current linking number), because the capability of each web server varies greatly, and thus current task number cannot reflect the real load capability of the system accurately, and the efficiency of processing various tasks would be more diverse with the different ways of HTTP request combination.