Optimization of quantitative reverse transcription PCR method for analysis of weakly expressed genes in crops based on rapeseed Front Plant Sci. 2022 Aug 9: ... the higher water content in some tissues and therefore problems with their grinding and other factors. For allopolyploid rapeseed, the presence of two genomes, often with different ...

Yilmaz et al. [20] proposed a thin-curved compressor blade repair method based on reverse engineering, free-form surface modeling from point cloud. Wang et al. ... and NURBS curves are used to fit the grinding path. 3) A pose optimization method considering robot manipulability and trajectory pose difference as the optimization …

The FDM process parameters are optimized using multi-objective optimization to maximize the mechanical strength of copper reinforced ABS composite parts. In the present research, it has been found that Genetic Algorithm is an efficient tool for performing multi-objective optimization of complex problems of FDM process.

The robot trajectory for the grinding operation of a turbine blade surface is determined using the isoscallop height method and material removal profile (MRP). …

The expert system analyses the experimental results and applies the NSGA-II optimization method to suggest a set of grinding parameters to grind a surface with …

The grinding and classification process is one of the key sub-processes in mineral processing, which influences the final process indexes significantly and determines energy and ball consumption of the whole plant. Therefore, optimal control of the process has been very important in practice. In order to stabilize the grinding index and improve …

The grinding circuit investigated in the current study is a two-stage grinding circuit (Fig. 2) in which two overflow type mills are arranged in series and operated under wet condition.The run-of-mine ore was crushed to 10 mm, and it was then fed to the first ball mill, which was closed by a rake classifier.The second mill operated in a combined …

Grinding degree planning and contact force control are applied to adaptively adjust grinding degree. In order to more sufficiently utilize computational resources to minimize grinding path length, DACS is designed and applied in optimal sorting algorithm to make the latter gradually improve its optimization capability by self-optimization.

Abstract: In view of the current situation of narrow cement particle size distribution and low efficiency in the vertical grinding process of new dry cement production process, the research and application dynamics of online cement quality detection, internal pressure difference optimization setting and modeling and control of the vertical grinding …

A case study of a systematic approach to grinding circuit steady-state optimization is presented. After an overall review of the flow-sheet, two operating circuits were prepared for detailed testing.

The proposed method can reduce the average profile error by 33.5 %, improve the machining efficiency by 20.5 %, and decrease the average surface …

Internal traverse grinding (ITG) has shown its great potential in precision machining of valves in fuel supply systems. When grinding such valves, long grinding wheels with small diameter are necessary. However, the poor stiffness of grinding wheels causes large deflection of wheel quill during grinding, resulting in deviation between …

This paper introduces a new optimum method for internal plunge grinding by using the material removal model based on the power signals that were extracted from machine wheel spindle. An automatic grinding cycle optimization functional module is proposed to improve the process grinding efficiency while ensuring component quality …

Process Optimization of Robotic Grinding to Guarantee Material Removal Accuracy and Surface Quality Simultaneously Dingwei Li, Dingwei Li Huazhong University of Science and Technology. School of Mechanical Science and Engineering, State Key Laboratory of Intelligent Manufacturing Equipment and Technology, Huazhong University …

Machining of advanced glass ceramics is of great importance and is a challenging task for the modern industries. In this study, a new hybrid technique of grinding-aided electrochemical discharge drilling (G-ECDD) is attempted which combines the grinding action of a rotating abrasive tool and thermal melting action of …

An experimental programme based on statistical analysis was used for optimizing the reverse Rotation of silica from non-magnetic spiral preconcentrate of Kudremukh iron ore. Flotation of silica with amine and starch as the Rotation reagents was studied to estimate the optimum reagent levels at various mesh of grind. The …

1. Introduction. Grinding is an important precision machining process to efficiently produce finished components with good surface quality and high accuracy (Arafat et al., 2021).Nowadays, about 43% of grinding tools have been installed out of the total machines in production (Singh et al., 2020)paring with other machining processes, …

Grinding in reverse, frustrated! Greetings! I have a 09 Challenger R/T w/6spd manual just reached 33k miles. I began to noticed that it was very hard to get out of gear at times, hard to shift into 5th, and last problem to pop up was it began to grind while going into reverse. I immediately stopped driving it and made an appointment with the ...

Therefore, the objective of this research was to use these tools in a hybrid way in the prediction and multiobjective optimization of the grinding process of superalloys. In addition, the methodology used differs in ANN topology and in the way it integrates with NSGA-II. Another particularity is the mapping that the proposed model …

Just started this morning at a traffic signal. As I was coming to a complete stop, the truck started surging and I thought it was going to stall. I put it in N and the idle came back up to normal. I then switched into D and it didn't want to go into gear unless I stepped on the gas pedal (up to about 1,200rpm), then it sorta slammed into 1st.

The hybrid particle swarm optimization regards the entire grinding process parameters (from rough grinding, semi-finish grinding, finish grinding to spark-out grinding) as a whole, and realizes the parameter optimization by considering multiple objectives and constrains. The establishment of the response surface model of surface …

Thirdly, an optimization method, including profile optimization and grinding wheel wear optimization, is proposed for the calculation of the grinding wheel profile. ... the main method of reverse ...

Grinding plays an important role in mining, construction, metallurgy, chemical, coal and other basic industries. In terms of beneficiation, grinding is the most energy consuming operation. So, reasonable grinding conditions according to the properties of ores is the key to obtain good grinding results and reduce energy …

The results demonstrated that applying the Gaussian heat source model and response surface optimization yielded the optimal solution, with a maximum deviation of 1.37% between the simulation and optimization results. By selecting a grinding depth (ap) of 0.40 mm, wheel speed (vs) of 40.00 m/s, and feed rate (vx) of 0.036 mm/s as the …

The target 80 percent passing size of the grinding circuit product is a convenient reference point, as it is often used to express the grind size objective. This size is close to the modal value of typical size distributions of ground material (Gaudin, 1939), and also roughly approximates the classifier cut size (Mular and Jull,1980; Arterburn ...

To solve this problem, a new trajectory planning method based on reverse compensation of profile error for robotic belt grinding is proposed in this paper, which can significantly improve the machining efficiency and profile accuracy of the blisk. The …

Industrial grinding processes always involve multiple sequential passes, such as rough, semi-rough, semi-finish, finish, and spark-out, for the surface and geometrical accuracy generation. The design of multi-pass grinding process parameters usually requires in-depth heuristic knowledge or complex process modeling. However, when …

Chen selected the grinding machine bed, spindle, and wheel seat as the optimization object, and took the performance of the grinding machine as the goal, and used the structural optimization method, the sensitivity analysis method, and the parametric experimental design and analysis method to realize the optimal design of the …

Reducing carbon emissions during belt grinding is of great significance for environmentally friendly production in the manufacturing industry. In this paper, in order to better grinding aero-engine titanium …

The physical or empirical modeling of the grinding process and the effects of its parameters on the workpiece quality is sophisticated. This is due to the extreme complexity of the process. So far, no remarkable success could be made by the proposed models to achieve a reliable and effective design and control of the process. This article …