Papers by Keyword: Response Surface Analysis

Abstract: The surface roughness is monitored using the cutting force and the cutting temperature in the ball-end milling process by utilizing the response surface analysis with the Box-Behnken design. The optimum cutting condition is obtained referring to the minimum surface roughness, which is the spindle speed, the feed rate, the depth of cut, and the tool diameter. The models of cutting force ratio and the cutting temperature are proposed and developed based on the experimental results. It is understood that the surface roughness is improved with an increase in spindle speed, feed rate and depth of cut. The cutting temperature decreases with an increase in tool diameter. The model verification has showed that the experimentally obtained surface roughness model is reliable and accurate to estimate the surface roughness.

Abstract: Biomass pyrolysis is a good high-value process of biomass conversion. Study on the pyrolysis products of crushed cotton stalks pyrolysis experiments in the self-made airtight equipment. The effects of three factors (pyrolysis temperature,pyrolysis heating rate and pyrolysis holding time) were investigated by using the mass of the solid products yield as the indexes .Box-Benhnken design ( BBD ) and response surface methodology ( RSM) were adopted to obtain the optimum parameters on the basis of results of single-factor experiments.The results show that: when pyrolysis temperature is 500°C.the heating rate is 9°C/min and holding time is 1h,solid products yield 33.4123%, liquid products yield 36.5699%, and gaseous products yield 30.0178%.

Abstract: This paper is concerned with the modeling of both endpoint temperature and carbon content for BOF steelmaking. First, a linear regression predictive model is constructed based on the linear regression analysis method. Next, the response surface analysis method is used to construct a nonlinear predictive model. The significant contribution of this paper is that response surface analysis is proposed for constructing the predictive model of BOF steelmaking. Finally, experiment simulation results show the effectiveness and advantages of the proposed methods.

Abstract: Response surface analysis was applied to optimize the processing of preparing the heat-resistance of the cotton stalks bast fiber reinforced PLA composite. Effects of all factors were evaluated and three factors were selected, which were addition of TAIC, mass fraction of fibers and length of fibers. Subsequently, response surface analysis based on Box-Behnken experimental design was employed to evaluate the interactive effects of three factors. One mathematical model for the processing of composites as functions was established. The results showed that the optimal processing was that the addition of TAIC was 2.1%, the mass fraction of fibers was 26.7%, the length of fibers was 11.7mm, and the HDT of composite was 161.39°C. Under the optimal conditions, the true value was close to the predicted value.

Abstract: Using electrochemical oxidation method treats the acid red 3R simulation wastewater, investigates the influence of current density, electrolyte concentration, pH-value and aeration and their interaction on the removal rate of chroma. Through the design of Box-Benhnken Design(BBD) and the response surface analysis, the influence sequence of all variables is current density > aeration > electrolyte concentration > pH-value, the influence sequence of all interaction is electrolyte concentration-aeration > current density-aeration ,electrolyte concentration-pH value > current density-pH value > pH value-aeration > current density-electrolyte concentration. Ultimately, the optimal value is 98.4915% under the condition of current density of 6.51mA/cm2,electrolyte concentration of 0.04mol/L,pH-value of 4.17 and aeration of 0.24m3/h.

Abstract: Ceramic coatings based on sol-gel method have increasingly gained much attention in recent times. In order to ascertain important experimental factors (variables) influencing surface properties, such as adhesion, pencil hardness and advancing contact angle (non-stick) of sol coatings, a 2_6-1-factorial screening design with six experimental variables, precursor mole ratio, low surface energy polymer concentration, silane coupling agent (SCA) concentration, silica nanoparticles concentration (SNP’s),curing temperature and three responses ( surface properties) were investigated. The results indicate that silane coupling agent concentration, SNP’s concentration and their interaction were the most significant experimental factors influencing advancing contact angle. None of the experimental factors studied were statistically significant with respect to hardness and adhesion.

Abstract: The preparation technology of tilapia protein hydrolysates by building single factor test and response surface methodology (RSM) were defined. The effect of hydrolysis temperature, pH, the additive quantity of Alcalase, the ratio of liquid-to-solid on degree of hydrolysis (DH), TCA-soluble nitrogen index (TCA-NSI) and yield of acid-solubility peptide (YASP) by regression model was obtained by response surface analysis. Regression model indicated that the optimal condition hydrolyzed animal protein of tilapia meat by proteinase was described as following：hydrolysis temperature 54.30°C, pH 8.77, the additive quantity of Alcalase 2.4L was 3702U/g, the ratio of liquid-to-solid was 3.06, hydrolysis time 1 hour. Under such conditions, the DH(%), TCA-NSI(%) and YASP(%) reached 33.63%, 22.10%, 64.55%, respectively. Experiment result showed that the predictive value and experimental value was small deviation and indicated that regression model was reasonable and reliable.

Abstract: The Response Surface Analysis using the BBD (Box-Behnken Design) design (Design Expert, Cabit Information Technology Co., Ltd) was applied in identifying the optimal process parameters for the separation and purification of fennel oil using molecular distillation technology. The experiments were carried out based on single factor analysis (feeding rate, evaporation temperature and film wiping speed). The dependent variable second-order regression equation was obtained. The optimal conditions were identified as: feeding rate = 2 drops/second, evaporation temperature = 50°C and film wiping speed = 215 rpm. The concentration of anisole in the extraction under the optimized condition reached 86.69%.

Abstract: One kind of cheese kneading experiment test rig was designed, which can imitates artificial kneading movement. Response surface method was used to enhance the performance of the machine. It was investigated that the influence of crank rolling velocity, crank length and crank angle on kneading quality and efficiency. The results show that factors influence the working efficiency list in order as follows: the crank rolling velocity, the angle between a connecting bar and a kneading bar, the crank length. The best combination of optimised parameters are: the crank rolling velocity is 62r/min, the crank length is 28mm, the angle between a connecting bar and a kneading bar is 125°.

Abstract: In order to realize the environmental hazard, this paper presents the investigation of the machinability of ball-end milling process with the dry cutting, the wet cutting, and the mist cutting for aluminum. The relations of the surface roughness, the cutting force, and the cutting parameters are examined based on the experimental results by using the Response Surface Analysis with the Box-Behnken design. The in-process cutting force is monitored to analyze the relations of the surface roughness and the cutting parameters. The proper cutting condition can be determined easily referring to the minimum use of cutting fluid, and the minimum surface roughness and cutting force of the surface plot. The effectiveness of the obtained surface roughness and cutting force models have been proved by utilizing the analysis of variance at 95% confident level.