Recalculation Method Research Articles

РАЗРАБОТКА ОРГАНИЗАЦИОННО-ТЕХНИЧЕСКИХ РЕШЕНИЙ ПО ПОВЫШЕНИЮ КАЧЕСТВА ПРОЦЕССОВ РАСПРЕДЕЛЕНИЯ ГАЗОМОТОРНОГО ТОПЛИВА ДЛЯ ОБСЛУЖИВАЮЩИХ ПРОИЗВОДСТВ

The article is devoted to the current problem of improving resource-saving processes in service industries of industrial enterprises. With the development of the practice of switching industrial vehicles to gas engine fuel, the issue of accounting for supplied gas becomes relevant. The purpose of the article is to develop organizational and technical solutions to improve the quality of gas engine fuel distribution processes for supporting subsystems of industrial enterprises in terms of metrological support for accounting for resource consumption. The main research methods are the analysis of normative and regulatory documents, a comparative analysis of methods and methods for organizing gas distribution processes, a method of system design for measuring resource consumption. As a means of measuring the amount of supplied resources, Coriolis mass meters are used, where mass flow and density are measured by the direct method, and volume flow by the recalculation method. The article substantiates the feasibility of switching the service subsystems of industrial enterprises to gas engine fuel due to its lower cost, the presence of main and distribution gas pipelines, reducing the impact on the environment, and increasing the service life of the motor engine. Disadvantages of known methods for checking gas dispensers have been identified, namely the need to bleed gas from cylinders into the atmosphere after each operation of filling and weighing cylinders, the need to deliver heavy cylinders and scales to gas pressure stations, as well as the need to decommission gas dispensers during verification of filling cylinders. . A model of a mobile automobile gas refueling station has been proposed, which differs from the existing ones in that a reference meter block is installed directly after the refueling unit, with the help of which the commercial metering system of the gas filling station is verified. This method of organizing the process of distribution of gas motor fuel within the gas filling infrastructure of an industrial enterprise can significantly improve the quality of work of transport subsystems of enterprises: increase the accuracy of gas consumption control, eliminate downtime of industrial transport, and provide the ability to take into account the seasonality of fuel consumption.

RADIATION PROTECTION IN THE NUCLEAR MEDICINE CENTER FROM PET RADIONUCLIDE

The purpose of this article is to present a methodology for determining sufficiency of the wall thickness to protect patients from the non-therapeutic effects of a medical source of ionizing radiation and calculating its increase in a way alternative to the use of the Monte Carlo method. The article is based on a case with a specific source of 18F activity of 4 Сi in a tungsten container with a wall thickness of 29.5 mm, which are used in the Center of Nuclear Medicine of the Republic of Kazakhstan. The objectives of the study are the following: calculation of the exposure dose rate from a radionuclide source of certain activity; calculation of the multiplicity of the dose attenuation rate to ensure human safety and establishing the necessary thickness of protection from the opted building material. The results of these calculations may differ depending on the method of direct and reverse recalculation of various radiation doses units, and therefore the conclusion suggests the most optimal of them in terms of physical efficiency, economic feasibility and regulatory performance. Operational dosimetry solves the problem of implementing the ALARA principle, problems of optimizing radiation safety are solved. Reducing the dose load on a person is achieved by reducing the operating time, increasing the distance to the radiation source and using a protective screen. The article describes the choice of protective material and its thickness for protection against radionuclide sources.

Review and practice of optimal structural design and selection of structural systems

The article describes the analysis of the optimal structural design and selection of structural systems and analyzes the technical and economic indicators of various design solutions. An important step in solving the design optimization problem is the correct choice of the optimality indicator. In the works included in the review, various optimality criteria are adopted. For example, the criterion for the minimum weight is justified when the structure's material is homogeneous. The issues of choosing a quality criterion when optimizing the design of a structure for minimum weight are also given a place. Comparing various recalculation methods while minimizing the weight of a structure under conditions of permissible stresses and displacements in certain load cases, the work looks at a nonlinear programming method and algorithms based on optimality criteria and a "mixed method" based on combining recalculation and nonlinear programming methods. In modern conditions, the restructuring and reorientation of the economy of the Republic, when the need arises for structures that allow placing medium and small enterprises, and in areas with the minimum level of employment, the problem arises of choosing a certain constructive solution that allows the construction of facilities with minimal labor costs, cost, the earliest possible payback and while ensuring seismic resistance. In this regard, various design solutions' technical and economic indicators are analyzed.

ВИЗНАЧЕННЯ ОПТИМАЛЬНИХ КООРДИНАТ РОЗМІЩЕННЯ РОЗПОДІЛЬЧИХ ЦЕНТРІВ НА ВІДРІЗКУ ДОРОГИ

One of the optimization tasks in logistics chains is determining the optimal number and location of distribution centers, which allows companies to reduce delivery costs, shorten delivery time, and ensure more reliable and stable delivery of goods to consumers. This, in turn, increases customer satisfaction and contributes to the formation of high customer loyalty to the business. Additionally, optimal placement of distribution centers helps reduce road congestion and decrease emissions of harmful substances, promoting sustainable development and environmental preservation. The study analyzed the peculiarities of the methods used in sales logistics for determining the optimal location of distribution centers. The limitations of existing methods for determining the optimal coordinates for locating distribution centers on a road segment were substantiated. The validity of the constraint that the coordinates of distribution centers should coincide with the coordinates of certain customers of the distribution centers was confirmed. A suitable method for solving practical problems was proposed for finding optimal solutions regarding the service area and location of two or more distribution centers on a road segment. The proposed method assumes that the coordinates of the distribution centers coincide with the coordinates of individual consumers. The functionality of the method was demonstrated through a case study. The method was tested on thirty-three examples where eleven customers of distribution centers were located on a 100 km road segment. Each example contained unique values of indicators such as "customer's cargo turnover for a period" and "freight transportation tariff." In all cases, the results of the proposed method in the study matched 100% with the results of the method of complete recalculation (MCR). The method presented in the study for determining the optimal coordinates for locating distribution centers on a road segment is considered reliable. Further research should involve testing the method on examples with a larger number of customers and a larger number of distribution centers.

Поддержка принятия решений по планированию образовательного процесса на основе ситуационного подхода и метода рационализации времени обучения

PURPOSE. According to the authors’ point of view, the situational approach to decision-making in training system (pedagogical system) can be applied to formalize the decision-making process for managing this organizational system, and it will allow using various methods, ways of modeling and calculating the main indicators of its functioning. The proposed approach concentrates management activities of a chief based on the existing combination of input indicators and the performance results of the specified system. At the same time, it is possible to exclude to a certain extent the subjectivity introduced by students and their groups into decision-making process. The method of sequential recalculation of learning time on the totality of learning stages makes it possible to rationalize the planning of the educational process. The hypothesis of the research is that the model of pedagogical system functioning can be formally defined by means of implementing its function, which allows students to acquire new qualities from a variety of professionally significant qualities R on the basis of their basic qualities from a variety of Z. METHODS. As a mathematical apparatus, set-theoretic methods, methods of mathematical analysis, as well as methods of mathematical statistics have been used. FINDINGS. The presented approach and method make it possible to increase the efficiency of decisions made and implemented in a managed pedagogical system, which as a whole allows rationalizing and improving its work. RESEARCH APPLICATION FIELD. The proposed method is applicable both in implementing basic educational programs and advanced professional education programs, carried out in traditional forms and with the use of distance learning techniques. CONCLUSIONS. The situational approach allows applying formal methods to the pedagogical system, and the proposed method of learning time rationalization assumes reducing the total training time with the priotirization of individual disciplines and the parameters which are not subject to change.

The Calculation Method of Ice Melting Schemes’ Relay Protection Settings and Clarification of the Ice Depositions Control Method on Steel Lightning Protection Wires

The method of current values calculation of overcurrent and undercurrent relay protections included in the complex of relay protection of ice melting schemes by alternating current on steel lightning protection wires of overhead transmission lines is analysed. A comparison with the generally accepted method, called the element-by-element method, is made. The element-by-element method is based on using the parameters of all the elements included in the ice melting scheme to calculate the maximum and minimum melting currents, from which the corresponding protections must be adjusted. These parameters have a significant variation, especially the active and internal reactive resistances of steel lightning protection wires at alternating current, what increases the calculation error. The proposed method, called the recalculation method, is based on the use of the trial melting mode parameters, carried out annually in the autumn season on lightning protection wires, with a duration up to 2 minutes. In difference to the usual practice, the trial melting has to be carried out 2 times with different currents. According to the parameters of the mode the settings of relay protection are recalculated using the given methods. The methodological and additional errors of the new method are estimated, that shows proposed method advantage. The parameters of the trial melting mode can be used to specify the methodology for remote control of ice formation (the length of the ice formation zone).

Determination of the mechanical properties of 3d-printed polymer products by methods of structural mechanics

Mathematical models of stress-strain state (SSS) for modeling tests of polymer composite samples obtained by fused deposition modeling (FDM) in approximations of isotropic and orthotropic media are formulated. An algorithm for solving the inverse SSS problem to determine the effective mechanical properties in the orthotropic approximation of composite products printed by the FDM method has been developed. Numerical models have been developed to solve inverse SSS problems to determine the effective orthotropic mechanical properties of composite products with different degrees of reinforcement, obtained using additive technologies based on the FDM method. The grid convergence of the developed numerical models by the method of double recalculation is investigated. It is established that the used mesh of geometric models of product samples leads to errors in determining the vector of the modulus of elasticity in the range of 0–3.19%, and the vector of the shear modulus does not exceed 0.05–0.2%. Numerical experiments to determine the effective mechanical properties of samples of composite polymeric materials in the approximation of orthotropic homogeneous medium were performed. The obtained results are compared with the data of calculations by analytical dependences to determine the effective mechanical properties of composite materials. It is shown that the results of numerical studies agree satisfactorily with the corresponding data obtained from analytical dependences in the range of 0.081–5.696%. It is established that all three components of the vectors of modulus of elasticity and shear increase with the degree of reinforcement. The largest increase is observed for the components of vectors and , which is due to the reinforcement in the direction , and the difference between the values ​​of the components of vectors and and and is due to the cross-sectional asymmetry of the strand. Dependences for operative prediction of effective orthotropic mechanical properties of composites based on PLA + KEVLAR 29 within the limits of change in the volume fraction of reinforcing fibers up to 5% are obtained. To develop new composite materials with predetermined properties, it is not necessary to perform multivariate, rather complex and cumbersome numerical experiments in solving the inverse SSS problem.

Towards Flexible and Truthful Incentive for Multichannel Allocation in DSA

Due to its potential of increasing spectrum utilization, dynamic spectrum access (DSA) is a promising platform to solve the so-called spectrum shortage problem, caused by a huge proliferation of wireless applications and services. Because of good allocation efficiency and fairness, auction based mechanisms have been extensively studied in DSA, in which truthfulness is a critical property to guarantee that each bidder can obtain her maximal utility by bidding with her true valuation of bidding spectrum. However, existing spectrum auction mechanisms on homogenous channels strictly require bidders to bid one channel or multiple channels with continuous demands, and does not consider the noncontinuous demands for channels. In this paper, we propose THIMBLE, the first TrutHful Incentive Mechanism for flexiBle muLtichannEl allocation by considering bidders’ continuous/noncontinuous demands for channels and spatial reusability. Specifically, bidders using the same channel without interference are formulated to a group, and a group bid recalculation method is presented for noncontinuous group bids. Next, a winner selection and charging method based on group bids is designed to achieve truthfulness. Extensive simulation results show that THIMBLE achieves not only truthfulness in continuous and noncontinuous channel demand cases, but also as good spectrum allocation efficiency as existing spectrum auction mechanisms.

Fear of Missing Out Scale – A Nationwide Representative CAWI Survey in Poland

Fear Of Missing Out (FOMO) is a growing problem that arouses interest from scientists, media and recipients. Therefore, finding a universal way to calculate the scale of the phenomenon can not only become a common tool for estimating the extent of FOMO occurrence in any country, but also can be considered for managing this phenomenon. The article presents the results of measuring the FOMO scale in Poland in 2018. The project applied a Computer Assisted Web Interview survey of the representative sample (N=1060) of Poland’s internet users aged 15 years plus. Three groups of ‘FOMO level’ characteristics were determined (age was the most influential variable). The original method of recalculation of the FOMO scale results from figures to percentage data was developed in order to present the FOMO scale index. The FOMO items showed good internal consistency and reliability Cronbach’s α = .89, thus complementing previous international studies.

Evaluation of Grinding Wheel Surface Shape on Difference Multiple Helical Dressing Condition

In the grinding process, a grinding wheel surface is a tool that is directly applied to the workpiece. As the condition of the grinding wheel surface is determined by its dressing conditions, the ability to accurately measure the grinding wheel surface with an applied dressing would enable the prediction of the ground surface characteristics of the workpiece as well as the determination of optimum dressing conditions. Recently, a new dressing method called the multiple helical dressing was proposed, which has led to improvements in the grinding performance. However, there is still no method to quantitatively evaluate the changes in the grinding wheel surface condition caused by multiple helical dressings. In this study, we measured the grinding wheel surface applied with multiple helical dressings using a so-called measured focus position recalculation method to determine whether we can quantitatively evaluate the measured dressing grooves generated on the grinding wheel surface by multiple helical dressings, and the resultant undulated grinding wheel surface shapes. We ground an actual workpiece to demonstrate the effects of changes in the grinding wheel surface shape due to multiple helical dressings on the ground surface of the workpiece. The experimental results show that our proposed measuring method can accurately measure the changes in the grinding wheel surface condition due to multiple helical dressings. We also proposed a method to evaluate the dressing grooves to prove that we can quantitatively evaluate the measurement results of dressing grooves generated by multiple helical dressings. In addition, we evaluated undulated grinding wheel surface shapes as its cylindricities by extracting only the undulation shapes generated by multiple helical dressings. Finally, we performed groove grinding with a grinding wheel applied with multiple helical dressings to reveal the relationship between the ground surface of the workpiece and the grinding wheel surface condition, which demonstrated the effectiveness of multiple helical dressings.

Investigation of the real gas conversion method for a low-temperature methane compressor

In this work, a study was made of methods for converting a real gas from a full-scale compressor to a model one for low-temperature pure methane using the equations of state of a real gas Benedict-Webb-Rubin and Peng-Robinson. In the course of the work, the features of recalculation methods were studied, a model of an air compressor was selected, corresponding in parameters to a model of a low-temperature methane compressor using the theory of similarity, using similarity criteria. Also, in this work, the features of the application of various equations of state were studied when describing the model of a low-temperature methane compressor, as well as the features that arise when this model is converted to an air model analogue. Data were obtained on the possibility of applying the proposed methods on real units, and the invariance of the method with respect to the used equations of state of a real gas for pure methane at temperatures from 150 to 300 K and a division of 0.2 MPa was proved. At the final stage of the work, comparative characteristics of two models of natural methane compressors were obtained, based on different equations of real gas, describing the medium and two models of model compressors using air as a working medium and being model analogs of the above units.

Newton projection method as applied to assembly simulation

In this paper, we consider Newton projection method for solving the quadratic programming problem that emerges in simulation of joining process for assembly with compliant parts. This particular class of problems has specific features such as an ill-conditioned Hessian and a sparse matrix of constraints as well as a requirement for the large-scale computations. We use the projected Newton method with a quadratic rate of convergence and suggest some improvements to reduce the solving time: a method for solving the system of linear equations, so-called constraint recalculation method, and compare different approaches for step-size selection. We use the duality principle to formulate alternative forms of the minimization problem that, as a rule, can be solved faster. We describe how to solve the considered nonlinear minimization problem with the nonsmooth objective function by modifying Newton projection method and employing subgradients. In addition, we prove the convergence of the suggested algorithm. Finally, we compare Newton projection method with the other quadratic programming techniques on a number of assembly simulation problems.

Conversion methods for modified Jaffe reaction assays of serum creatinine.

Background:Modifications in Jaffe serum creatinine (sCr) assays question the suitability of the results for direct comparison.Methods:sCr in adult in-patients was routinely measured either by SRM 909-standardized/noncompensated (method A) or isotope dilution mass spectrometry traceable/compensated method (reference). We converted values by method A into values by the reference using a formula provided by the manufacturer [Beckman Coulter (BC)] and traditional equating methods.Results:The BC-based conversion and linear equating resulted in underestimated sCr values, whereas equipercentile equating (EE) provided sCr with not significantly different distribution from the reference values. Proportions of patients with renal impairment did not differ between the reference and EE-converted sCr, as opposed to BC-recalculated values. Three percent of patients were classified into better renal function category when applying BC versus EE conversion.Conclusions:Equipercentile equation was a more accurate method for recalculation of sCr obtained from different Jaffe reaction assays than the linear equating or the BC linear formula. This study emphasizes the importance of the derivation sample specificity when applying research results to other real-world populations.

Investigation of the Effect of the Plasma Thin-Film Coating System Si−O−C−N on the Surface Hardening of High-Speed Steel

The results of studying changes in the strength properties of the surface of a tool product from high-speed steel (HSS) of the W6Mo5Cr4V2 type after its hardening by the application of the Si−O−C−N micron plasma coating system are presented. The study is conducted by comparing the properties of the surface, evaluated by the same methods before and after coating. In this case, the sample goes through a complete cycle of mechanical and heat treatment designed for the product before coating. The results of evaluation of the adhesive strength of the coating using the proposed method of recalculation are given, and the correspondence between the index of destruction of the coating of the VDI 3198: 1992-08 technique and the delamination coefficient is obtained. The study itself is carried out by indenting and scratching the surface with HV, HRC and HRB-type indenters in the load variation range of 0.1–200 N, which makes it possible to simulate different levels of contact pressure in the surface layer of the substrate and at the base–coating interface. It is shown that the application of a thin-film coating of the Si−O−C−N system by the plasma method makes it possible, in addition to standard heat treatment of HSS steel, to increase the surface resistance to penetration and scratching with harder bodies. The causes of the obtained positive effect are analyzed and the limits of the expediency of applying plasma hardening depending on the contact task are described. These results make it possible to consider the method of the additional plasma hardening of HSS steel as promising for implementation.

Adjoint‐based sensitivity analysis of circulating liquid fuel system for the multiphysics model of molten salt reactor

The strongly coupled behaviors between neutronics and thermal-hydraulics of liquid-fueled molten salt reactors make it difficult to evaluate system behaviors, due to the transport of precursors along moving fuel. Extending an adjoint-based method on the multiphysics approach, different assumptions on temperature dependencies of nuclear and thermophysical properties of salt are included in the local sensitivity analysis of a circulating liquid fuel system. Local sensitivity of various types of system response in steady-state is analyzed for 39 parameters including coupling models, reactor design values, and kinetic constants of delayed neutron and decay heat precursors for a simplified 1D model of molten salt fast reactor. Extended adjoint-based sensitivity analysis method for MSR is successfully validated achieving 1.38% deviation on average between a recalculation and adjoint method, comparing local sensitivities to all parameters. Also, it takes 66.3 times less in computational time compared with the recalculation method for evaluating the sensitivity of the same type of system response. The importance of all the parameters to the system response is analyzed according to the assumptions on temperature dependencies to nuclear data and salt properties. The most influencing ones are fission energy-related terms, and their importance increases when temperature dependencies are taken into account, compared with constant properties. Changes of influences on the sensitivity are investigated from the relative changes of the parameter values in various system response types, and it implies the importance to consider the multiphysics modeling on the local sensitivity analysis.

Measurement of grinding wheel surface shape by measured focus position recalculation method

Measurement of grinding wheel surface shape by measured focus position recalculation method

Improving the accuracy of emission inventories with a machine-learning approach and investigating transferability across cities

ABSTRACT This study presents a novel method for integrating the output of a microscopic emission modeling approach with a regional traffic assignment model in order to achieve an accurate greenhouse gas (GHG, in CO2-eq) emission estimate for transportation in large metropolitan regions. The CLustEr-based Validated Emission Recalculation (CLEVER) method makes use of instantaneous speed data and link-based traffic characteristics in order to refine on-road GHG inventories. The CLEVER approach first clusters road links based on aggregate traffic characteristics, then assigns representative emission factors (EFs), calibrated using the output of microscopic emission modeling. In this paper, cluster parameters including number and feature vector were calibrated with different sets of roads within the Greater Toronto Area (GTA), while assessing the spatial transferability of the algorithm. Using calibrated cluster sets, morning peak GHG emissions in the GTA were estimated to be 2,692 tons, which is lower than the estimate generated by a traditional, average speed approach (3,254 tons). Link-level comparison between CLEVER and the average speed approach demonstrates that GHG emissions for uncongested links were overestimated by the average speed model. In contrast, at intersections and ramps with more congested links and interrupted traffic flow, the average speed model underestimated GHG emissions. This proposed approach is able to capture variations in traffic conditions compared to the traditional average speed approach, without the need to conduct traffic simulation. Implications: A reliable traffic emissions estimate is necessary to evaluate transportation policies. Currently, accuracy and transferability are major limitations in modeling regional emissions. This paper develops a hybrid modeling approach (CLEVER) to bridge between computational efficiency and estimation accuracy. Using a k-means clustering algorithm with street-level traffic data, CLEVER generates representative emission factors for each cluster. The approach was validated against the baseline (output of a microscopic emission model), demonstrating transferability across different cities .

Research of the effect of wing icing on its aerodynamic characteristics using CFD methods

During the flight under certain atmospheric conditions, ice accretion can be formed on the surfaces of the aircraft, which negatively affects the aerodynamic aircraft performance. The most effective way of this effect researching is to conduct flight tests or studies in a wind tunnel. However, these methods spend a lot of money and time for preparing, experimenting, and processing the results.The use of computer hardware and specialized software can significantly reduce the calculating time of the aerodynamic performance of the aircraft under ice accretion conditions. However, the use of such methods of calculation requires preliminary research to identify the parameters of the calculation and the result processing method, which gives the most accurate result.In this work, the problem of transport aircraft wings` aerodynamic characteristics calculation under natural ice conditions by means of CFD method was considered; solver parameters for the correct determination of lift coefficient, drag coefficient and critical angle of attack were found.The computational predictions with different turbulence models and wind tunnel research data were compared.The optimal method for recalculation of airfoil characteristics to finite span wing characteristics was determined. The empirical formula for drag coefficient correction was obtained.The possibility of using certain turbulence models to calculate various aerodynamic coefficients of a wing in icing conditions was analyzed.

THE RECALCULATING TECHNIQUE THE HEAT-HYDRAULIC CHARACTERISTICS OF DIRECT-FLOW CYLINDRICAL STEAM GENERATORS OPERATING ON A FREON COOLANT, WITH THE BOUNDARY CONDITIONS OF THE SECOND KIND FOR THE BOUNDARY CONDITIONS OF THE FIRST KIND

The article is devoted to the development of a method for recalculating the thermal-hydraulic characteristics of direct-flow cylindrical steam-generating channels operating on a Freon coolant from the boundary conditions of the second kind for the boundary conditions of the first kind. The need for the development of such recalculation procedure is due to the presence in the literature of calculated dependences describing the heat transfer during evaporation of the coolant in porous channel for boundary conditions of the second kind, while the practical plan problems are often conditioned by other boundary conditions, in particular boundary conditions of the first kind. To clarify the essence of the recalculating method, the article briefly summarizes the calculated dependencies for computation of heat transfer and pressure drop in steam generating smooth-walled channels operating on a Freon heat carrier. The proposed method of recalculation is based on the use of the method of successive approximations when calculating the total amount of heat that is necessary for the phase transition process of evaporation. The final goal of the recalculation technique was to create a program for calculating the heat-hydraulic efficiency of direct-flow cylindrical steam generators operating on a Freon coolant. The proposed recalculation technique makes it possible to calculate in such steam generators for boundary conditions of the first kind next thermal-hydraulic characteristics: the channel length necessary for complete evaporation of the heat carrier; power required for pumping the coolant and the total amount of heat transferred to the coolant during the evaporation process.

A spill data aware memory assignment technique for improving power consumption of multimedia memory systems

As embedded memory technology evolves, the traditional Static Random Access Memory (SRAM) technology has reached the end of development. For deepening the manufacturing process technology, the next generation memory technology is highly required because of the exponentially increasing leakage current of SRAM. Non-volatile memories such as STT-MRAM (Spin Torque Transfer Magnetic Random Access Memory), PCM (Phase Change Memory) are good candidates for replacing SRAM technology in embedded memory systems. They have many advanced characteristics in the perspective of power consumption, leakage power, size (density) and latency. Nonetheless, nonvolatile memories have two major problems that hinder their use it the next-generation memory. First, the lifetime of the nonvolatile memory cell is limited by the number of write operations. Next, the write operation consumes more latency and power than the same size of the read operation. This study describes a compiler optimization technique to overcome such disadvantages of a nonvolatile memory component in hybrid cache memories. A hybrid cache is proposed to overcome the disadvantages using a compiler. Specifically, to minimize the number of write operations for nonvolatile memory, we present a data replacement technique that considers the locations of the register spill data. Many portions of the memory accesses are yielded by the spill data of a register allocator in an optimizing compiler. Such spill data can be partially removed using a recalculation method. Thus, we implemented an optimization technique that rearranges the data placement with recalculation to minimize the write instructions on the nonvolatile memory. Our experimental results show that the proposed technique can reduce the average number of spill codes by 20%, and improves the energy consumption by 20.2% on average.