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Physiological responses of Ross 308 broiler chickens fed graded levels of Moringa oleifera leaf meal (MOLM): some aspects of haematology and serum biochemistry

Physiological responses of Ross 308 broiler chickens fed gra...

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作者： Mojanaga, Morwaledi Morategi Cornelia University of South Africa

学位级别：博士

The high cost of feed materials and feed additives in developing nations has elicited interest in the search for sustainable alternatives. Moringa (Moringa oleifera), one of such sustainable alternatives is a tropical plant that has its usefulness investigated in this study. A 42-day study was designed to determine the response of Ross 308 broilers to dietary Moringa oleifera leaf meal supplementation. The Moringa oleifera leaves used for the study were analysed for proximate, mineral and composition as well as phytochemical contents before being incorporated in the diet. Day-old Ross 308 broiler chicks (n = 500) were allotted to five treatments in completely randomized design with each treatment replicated five times and each replicate having 20 chicks. The birds were subjected to diets supplemented with Moringa oleifera leaf meal at 0, 25, 50, 75 and 100 g/kg feed at both starter and finisher stage, respectively and designated as T1, T2, T3, T4 and T5. Moringa oleifera leaf meal level that supported optimum production and physiological variables was modelled using the quadratic function. At day 42, three birds per replicate were slaughtered to evaluate carcass and organ yields. Result of the proximate composition revealed that MOLM is rich in protein (32.37%) and neutral detergent fibre (52.16%). Mineral assay indicated that MOLM was high in calcium, sodium, potassium, sulphur and iron. Daily feed intake (FI), average daily gain (ADG) and feed conversion ratio were the same among the treatments with the exception of starter broilers on diet T1 that had higher ADG (p<0.05) than those on the other diets. Final live weight (FLW), mortality and gizzard weight were influenced (p<0.05) by Moringa oleifera leaf meal supplementation. Moringa oleifera leaf meal supplementation had no effect on parameters measured. Moringa oleifera leaf meal supplementation at 39.98 and 35.80 g/kg feed supported optimum FLW and ADG at starter phase and 46.88 g/kg feed MOLM supported optimum

关键词： Moringa leaf Growth performance Blood characteristics Carcass and organ yields optimization function Broiler chickens

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Simulation and optimization research on good-sized auto fitting production-inventory system

Simulation and optimization research on good-sized auto fitt...

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IEEE International Conference on Automation and Logistics

作者： Wang, Xuping Zhao, Hai Shang, Hongyan Dalian Univ Technol Inst Syst Engn Dalian Liaoning Peoples R China Changan Univ Sch Econ & Management Xian Peoples R China

ISBN: (纸本)9781424415304

Good-sized auto fittings Production-Inventory system has following drawbacks: overfilled warehouse, low efficiency of supply chain management and high logistics cost such as holding cost, ordering cost and so on. To solve these problems, this paper proposes a new simulation model and a new optimization model. Then the optimization model calculates the value of adaptive function by running the simulation model, outputting of which is controlled by these decision-making variables: products' safety stocks, material ordering batch and controlling strategy of the system's productivity. Finally, a case is designed. Running the simulation model and optimization model for three days, we get optimal solution of this case. Comparison between enterprise data and result of the case validates the simulation and optimization model. The model proposed in this paper can help third party logistics for auto business to lower logistics cost.

关键词： simulation and optimization good-sized auto fittings optimization function resources allocation

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Wideband Characterization of Single Parabolic Cylindrical Compact Range for Linear Array Feeds 14

Wideband Characterization of Single Parabolic Cylindrical Co...

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14th International Symposium on Antennas Propagation and EM Theory

作者： Yang, Ke Wang, Zhengpeng Beihang Univ Sch Elect & Informat Engn Beijing Peoples R China

ISBN: (纸本)9798350353129;9798350353136

Compact antenna ranges test (CATR) are commonly used for antenna testing and radar cross section measurements. The single parabolic cylindrical reflector (SPCR) compact range with a linear array feed can enhance aperture efficiency while maintaining high-quality quiet zone performance, thereby reducing the cost of measuring large equipment. This paper investigates the wideband characteristics of SPCR compact range. Firstly, the system design of the SPCR compact range with a linear array feed is introduced. Next, the wideband optimization function and optimization methods are discussed. Full-wave simulations and system experiments in the sub-6G operating frequency band are then conducted. The designed compact range achieves a high-quality quiet zone with an aperture efficiency of 60-70%, demonstrating the effectiveness and feasibility of the proposed method.

关键词： Compact antenna ranges test (CATR) quiet zone linear array optimization function

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PARALLEL MOTION ESTIMATION USING AN ANNEALED HOPFIELD NEURAL-NETWORK

PARALLEL MOTION ESTIMATION USING AN ANNEALED HOPFIELD NEURAL...

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Conference on Visual Communications and Image Processing 94

作者： KIM, Y ELECTR & TELECOMMUN RES INST TAEJONSOUTH KOREA

ISBN: (纸本)081941638X

An annealed Hopfield neural network has been shown to solve an image segmentation problem and good image segmentation was successfully achieved. In this paper, a new motion estimation algorithm using an annealed Hopfield neural network is developed. Motion estimation process can simply be described as finding the corresponding pixels in the consecutive images. optimization function E_me1 equals E_g to achieve this simple process is defined first. This optimization function finds the motion vector for a given pixel in a frame by finding a corresponding pixel in the next frame. However, the image sequence usually contains the noise. In this case, only finding the corresponding pixels does not work well in estimating the correct vector field. To make the motion vectors smooth within a moving object and to make the motion vectors different between the objects moving in different directions, weak continuity constraints terms, E_me2 equals E_d + E_s + E_p, are added to the previously defined optimization function E_me1, resulting in E_me equals E_me1 + E_me2. E_me2 controls the smoothness of the detected motion vectors within objects as well as maintains the motion vector boundaries between the objects moving to the different directions. Simulation are done for the synthetic image sequence and the real image sequence.

关键词： HOPFIELD NEURAL NETWORK ANNEALING SCHEDULE MOTION ESTIMATION optimization function VECTOR FIELD GLOBAL OPTIMUM

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Selection of the Optimum Damping Coefficient for Torsional Vibration Dampers for Crankshafts of Reciprocating Internal Combustion Engine 6th

Selection of the Optimum Damping Coefficient for Torsional V...

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6th International Conference on Industrial Engineering, ICIE 2020

作者： Gots, A.N. 87 Gorky Street Vladimir600000 Russia

ISBN: (纸本)9783030548131

The paper presents the free oscillation analysis of the reduced torsional system in the crankshaft of a six-cylinder piston internal combustion engine with a liquid or rubber (internal friction) damper mounted on the toe. Installing a torsional vibration damper on the sock of the crankshaft changes the frequency of free oscillations, and in addition, when installing a rubber damper, another mass of the torsional system is added with the coefficient of rigidity of the rubber layer and the moment of inertia of the damper flywheel. At the same time, for liquid torsional vibration damper, the flywheel which has no direct connection with the toe of the crankshaft, for the calculation of free oscillations to the moment of inertia of the sock it is necessary to add a half the moment of inertia of the flywheel. The order of selection of optimal damping coefficients, namely the moments of inertia of the damper flywheel and damping coefficients of silicone fluid, is considered. For the rubber (internal friction) damper, the necessary parameters include the moment of inertia of the flywheel, the stiffness coefficient of the rubber layer and the damping coefficient. The free oscillations are considered in a complex form, which allows obtaining a function after the transition to real values that can be taken as a function of optimizing the parameters of the liquid or rubber damper. In this case, at the optimum damping or maximum energy dissipated in the damper, the amplitude of torsional oscillations of the crankshaft toe is reduced as much as possible. Using this approach allows for a significant reduction in the number of calculations with different damping coefficients and chooses the most optimal results. © 2021, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Damping coefficient Flywheel moment of inertia optimization optimization function Torsional oscillations Torsional vibration damper

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Material Characterization of Weld Toe Region Using Digital Image Correlation

Material Characterization of Weld Toe Region Using Digital I...

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作者： ANDREA DEZO CHALMERS UNIVERSITY OF TECHNOLOGY

学位级别：硕士

Material models, properties of steel, the changes that occur during welding and different testing procedures were investigated as a starting point of the thesis work. The thesis project investigated the feasibility of using digital image correlation (DIC) in the process of material calibration. This consisted of the examination of local material properties at the weld toe of a welded joint, using digital image correlation in order to obtain the true strain field over the investigated area. The real stress-strain curves of the three material regions at the weld toe, namely, the weld material, base material and heat affected zone were obtained by means of material calibration, using an optimization function in Matlab, combined with the structural analysis capability of Abaqus. Since all weld geometries are significantly different, and the investigated area is very local, the accuracy of the Abaqus model is very important. Thus, in order to ensure a good correlation between the real test specimens and the Abaqus model, the test specimens were 3D scanned, and the obtained contour line was used in the creation of the model. The difficulty of the task arises from the presence of three different materials in a region where stress concentration is also present. Therefore, a test-run of the material calibration was performed on a statically loaded plate having a hole in the middle, serving as source of stress concentration and consisting of two materials. The results showed that deviation between the obtained stress-strain curves and the reference stress-strain curves was under 5 %, proving that the proposed material calibration procedure worked well. The DIC was performed on three test specimens, two of which were loaded statically and one was subjected to cyclic loading. One of the statically tested specimens was in its as welded state, while the other together with the cyclically loaded test specimen were treated with High Frequency Mechanical Impact (HFMI) treatment. The

关键词： Digital image correlation (DIC) Material calibration optimization function 3D scanning Weld toe Base material (BM) Heat affected zone (HAZ) Weld material (WM) High Frequency Mechanical Impact (HFMI) treatment

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Operating Strategies and Disturbance Characterization for DC Microgrids

Operating Strategies and Disturbance Characterization for DC...

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作者： Leonard-Albert, Miles University of South Carolina

学位级别：M.S., Master of Science/Master of Surgery

The present state of the electrical grid is unable to meet the demands of transmission. Digital twin technology provides a promising solution to this problem by allowing for analysis and control of distributed energy resources. This thesis presents initial work towards development of a digital twin for a DC power system. Two versions of the DC power system are created and evaluated against randomly generated load profiles. System performance is evaluated on the basis of the quantity of the load that is unserviced by the generation and energy storage. Energy storage operating strategies that modify the model to prioritize different aspects of the system are introduced, along with a discussion of the effects of the modifications. A preliminary optimization function is discussed that will be used to control the system. From this optimization function, key information that is needed for the digital twin can be determined. This work also introduces two additional works that will require adjustments as the digital twin is developed. The first measures the ability of the system to withstand disturbances. The second presents a decision matrix to examine the trade-off between the number of pulses that the system is capable of producing and the magnitude of those pulses.

关键词： DC microgrids Digital twin technology optimization function

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Mit :: Lcs :: Tr :: Mit-Lcs-Tr-113

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2016年

Mit :: Lcs :: Tr :: Mit-Lcs-Tr-113 by published by

关键词： assume column computational complexity cover double column feasible flow finite alphabet flow iff mit-lcs-tr-113 node node cover nodes optimization function polynomial polynomial time reduction reduction space subset subset sum three literals

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Depth-aware total variation regularization for underwater image dehazing

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SIGNAL PROCESSING-IMAGE COMMUNICATION 2021年 98卷 116408-116408页

作者： Ding, Xueyan Liang, Zheng Wang, Yafei Fu, Xianping Dalian Maritime Univ Informat Sci & Technol Sch Dalian 116026 Peoples R China Pengcheng Lab Shenzhen 518055 Guangdong Peoples R China

Underwater images often show severe quality degradation due to the light absorption and scattering effects in water medium. This paper introduces a scene depth regularized underwater image dehazing method to obtain high-quality underwater images. Unlike previous underwater image dehazing methods that usually calculate a transmission map or a scene depth map using priors, we construct an exponential relationship between transmission map and normalized scene depth map. An initial scene depth is first estimated by the difference between color channels. Then it is refined by total variation regularization to keep structures while smoothing excessive details. An alternating direction algorithm is given to solve the optimization problem. Extensive experiments demonstrate that the proposed method can effectively improve the visual quality of degraded underwater images, and yields high-quality results comparative to the state-of-the-art underwater image enhancement methods quantitatively and qualitatively.

关键词： Underwater image dehazing optimization function Normalized scene depth

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GIFM: An Image Restoration Method With Generalized Image Formation Model for Poor Visible Conditions

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IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING 2022年 60卷 1页

作者： Liang, Zheng Zhang, Weidong Ruan, Rui Zhuang, Peixian Li, Chongyi Anhui Univ Sch Internet Hefei 230039 Peoples R China Henan Inst Sci & Technol Sch Informat Engn Xinxiang 453003 Henan Peoples R China Univ Sci & Technol Beijing Sch Automat & Elect Engn Key Lab Knowledge Automat Ind Proc Minist Educ Beijing 100083 Peoples R China Nanyang Technol Univ Sch Comp Sci & Engn Singapore 639798 Singapore

Recently, image restoration has attracted considerable attention from researchers, and these methods generally restore degraded images based on the atmospheric scattering model (ATSM) and retinex model (RM). The two models only take into the single attenuation process during imaging, thereby introducing undesirable results. To deal with this issue, we propose an image restoration method based on a generalized image formation model (GIFM). First, unlike the existing image restoration methods, we rebuild a novel image formation model, which describes the light attenuation process that includes the light source-scene path and scene-sensor path. Second, we construct an objective optimization function to decompose a degraded image into a color distorted component and color corrected component, and an augmented Lagrange multiplier-based alternating direction minimization algorithm is provided to solve the optimization problem. Finally, we fully consider the advantages of the small-scale neighborhood and large-scale neighborhood in image restoration, and an image itself brightness-based weighted fusion strategy is proposed to balance brightness enhancement and contrast improvement. Extensive experiments on three image enhancement datasets show that our GIFM achieves better results than state-of-the-art methods. Experiments further suggest that our GIFM performs well for image restoration of extreme scenes, keypoint detection, object detection, and image segmentation.

关键词： Image restoration Atmospheric modeling Image color analysis Attenuation optimization Imaging Brightness Image formation model image restoration optimization function weighted fusion

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