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Prediction of Load-Displacement Curve of Flexible Pipe carcass Under Radial Compression Based on Residual Neural Network

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China Ocean Engineering 2023年第1期37卷 42-52页

作者： YAN Jun LI Wen-bo Murilo Augusto VAZ LU Hai-long ZHANG Heng-rui DU Hong-ze BU Yu-feng State Key Laboratory of Structural Analysis for Industrial Equipment Department of Engineering MechanicsDalian University of TechnologyDalian 116024China Ningbo Research Institute of Dalian University of Technology Ningbo 315016China Ocean Engineering Program Federal University of Rio de JaneiroRio de Janeiro 21941-901Brazil

The carcass layer of flexible pipe comprises a large-angle spiral structure with a complex interlocked stainless steel cross-section profile, which is mainly used to resist radial load. With the complex structure of the carcass layer, an equivalent simplified model is used to study the mechanical properties of the carcass layer. However, the current equivalent carcass model only considers the elastic deformation, and this simplification leads to huge errors in the calculation results. In this study, radial compression experiments were carried out to make the carcasses to undergo plastic deformation. Subsequently, a residual neural network based on the experimental data was established to predict the load-displacement curves of carcasses with different inner diameter in plastic states under radial compression.The established neural network model’s high precision was verified by experimental data, and the influence of the number of input variables on the accuracy of the neural network was discussed. The conclusion shows that the residual neural network model established based on the experimental data of the small-diameter carcass layer can predict the load-displacement curve of the large-diameter carcass layer in the plastic stage. With the decrease of input data, the prediction accuracy of residual network model in plasticity stage will decrease.

关键词： flexible pipe carcass radial compression experiment load−displacement curves residual neural network

Effect of Using Israel Napier Grass in Feed Ration on Growth Performance of Local Chicken of Cambodia

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Journal of Environmental Science and Engineering(B) 2024年第1期13卷 47-52页

作者： Sophea Rous Tola Ka Sokha Thim Sath Keo Kouch Theng Kampong Cheuteal Institute of Technology Prasat Sambour District 060403Kampong Thom ProvinceCambodia Faculty of Veterinary Medicine Royal University of AgriculturePhnom Penh 12400Cambodia

This study investigated the effect of Israel grass in feed formulation on growth performance of local chicken.The study was conducted from October 2023 until January 2024 in Kampong Chheutel Institute of Technology.The CRD(Completely Randomized Design)was used with 4 treatments and 4 replications.The local chicks were purchased from local famer at 1 day old and kept in whole pen by feeding commercial feed.At 21 days old the total 320 chicks were allocated into experimental treatments.The 4 feed formulas based on the level of Israel grass added such as 0,5%,7%and 9%,were called T1(control),T2,T3 and T4 respectively.The result showed that body weight gain,feed intake,ADG(Average Daily Gain)and FCR(Feed Conversion Ratio)in all treatments were not significantly different(p>0.05).However,there was strong correlation between living weight with carcass of al treatments,but no difference among carcass percentage of local chicken for all different diet in this study.In conclusion,the Israel grass did not affect growth performance of local chickens and can be used to replace some expensive feed ingredient,such as rice bran.

关键词： Israel grass growth performance carcass local chickens

Effects of carcass weight, sex and breed composition on meat cuts and carcass trait in finishing pigs

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Journal of Integrative Agriculture 2023年第5期22卷 1489-1501页

作者： XIE Lei QIN Jiang-tao RAO Lin CUI Deng-shuai TANG Xi XIAO Shi-jun ZHANG Zhi-yan HUANG Lu-sheng State Key Laboratory for Pig Genetic Improvement and Production Technology Jiangxi Agricultural UniversityNanchang 330045P.R.China

Pork cutting is a very important processing in promoting economic appreciation across the swine business chain. The goal of this research is to determine the proportion and weight of meat cuts, as well as to analyze the effects of carcass weight, sex and breed composition on meat cuts. Simultaneously, we investigate the correlation between meat cuts, carcass traits and meat quality traits. To assess 17 meat cut traits, 12 carcass traits and 6 meat quality traits, we sample 2 012 pigs from four breeds, including Landrace(LD), Yorkshire(YK), Landrace Yorkshire(LY), and Duroc Landrace Yorkshire(DLY). The results showed that carcass weight, sex and breed composition have significant effects on the weight and proportion of most meat cuts. The proportion of cuts for muscle and bone decrease as carcass weight grows, whereas the proportion of cuts for fat increases. Moreover, the thickness of four-point backfat was significantly increasing(Pcarcass weights, indicating that large amount of intaking energy in the late finishing stage was used for fat deposition. Besides, the proportion of Shoulder cut(SC) and Back fat(BF) in barrows was significantly higher(Pcarcass length, significantly longer(Pcarcass traits were low or not significant(P>0.05). The effects of carcass weight, sex and breed composition on the meat cuts, meat quality and

关键词： carcass meat cuts carcass traits commercial pig meat quality

Residual feed intake in beef cattle and its association with carcass traits, ruminal solid-fraction bacteria, and epithelium gene expression

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Journal of Animal Science and Biotechnology 2018年第4期9卷 878-890页

作者： Ahmed A.Elolimy Mohamed K.Abdelmegeid Joshua C.McCann Daniel W.Shike Juan J.Loor Mammalian NutriPhysioGenomics Department of Animal SciencesUniversity of Illinois Department of Animal Sciences University of Illinois Faculty of Veterinary Medicine Kafrelsheikh University Division of Nutritional Sciences Illinois Informatics Institute University of Illinois

Background: Residual feed intake(RFI) describes an animal's feed efficiency independent of growth performance.The objective of this study was to determine differences in growth performance, carcass traits, major bacteria attached to ruminal solids-fraction, and ruminal epithelium gene expression between the most-efficient and the least-efficient beef cattle. One-hundred and forty-nine Red Angus cattle were allocated to three contemporary groups according to sex and herd origin. Animals were fed a finishing diet in confinement for 70 d to determine the RFI category for each. Within each group, the two most-efficient(n = 6; RFI coefficient =-2.69 ± 0.58 kg dry matter intake(DMI)/d) and the two least-efficient animals(n = 6; RFI coefficient = 3.08 ± 0.55 kg DMI/d) were selected. Immediately after slaughter, ruminal solids-fraction and ruminal epithelium were collected for bacteria relative abundance and epithelial gene expression analyses, respectively, using real-time PCR.Results: The most-efficient animals consumed less feed(P = 0.01; 5.03 kg less DMI/d) compared with the leastefficient animals. No differences(P > 0.10) in initial body weight(BW), final BW, and average daily gain(ADG) were observed between the two RFI classes. There were no significant RFI × sex effects(P > 0.10) on growth performance.Compared with the least-efficient group, hot carcass weight(HCW), ribeye area(REA), and kidney, pelvic, and heart fat(KPH) were greater(P ≤ 0.05) in the most-efficient cattle. No RFI × sex effect(P > 0.10) for carcass traits was detected between RFI groups. Of the 10 bacterial species evaluated, the most-efficient compared with least efficient cattle had greater(P ≤ 0.05) relative abundance of Eubacterium ruminantium, Fibrobacter succinogenes, and Megasphaera elsdenii, and lower(P ≤ 0.05) Succinimonas amylolytica and total bacterial density. No RFI × sex effect on ruminal bacteria was detected between RFI groups. Of the 34 genes evaluated in ruminal epithelium, the mostefficient cattle had greater(P ≤ 0.05) abundance

关键词： Beef cattle carcass Gene expression Growth RFI Ruminal bacteria Ruminal epithelium Sex

Substitution of ramie (Boehmeria nivea) for alfalfa in improving the carcass and meat quality of Liuyang Black goats

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Animal Nutrition 2021年第3期7卷 688-694页

作者： Shaoxun Tang Yao He Peihua Zhang Jinhe Kang Qiongxian Yan Xuefeng Han Zhiliang Tan Hongrong Wang Duanqin Wu Lihuai Yu Min Wang Chuanshe Zhou Jinzhen Jiao CAS Key Laboratory for Agro-Ecological Processes in Subtropical Region National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry ProductionHunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic ProcessSouth-Central Experimental Station of Animal Nutrition and Feed Science in the Ministry of AgricultureInstitute of Subtropical AgricultureThe Chinese Academy of SciencesChangshaHunan410125China College of Animal Science and Technology Yangzhou UniversityYangzhouJiangsu225009China Institute of Bast Fiber Crops Chinese Academy of Agricultural SciencesChangshaHunan410205China College of Animal Science and Technology Hunan Agricultural UniversityChangshaHunan410128China

Ramie(Boehmeria nivea)is noted for the production of a large biomass that has a high protein content and is rich in antioxidants.It may thus serve as a high-quality forage material to replace alfalfa and improve the meat quality of farmed animals.In this study,we evaluated the carcass characteristics and meat quality of goats when 0,35%,75%,and 100%of dietary alfalfa was replaced with ramie.Crude protein content(linear,P<0.0001)and key muscle color values at 24 h after slaughter decreased with increasing ramie levels.The content of most individual amino acids,non-essential amino acids(NEAA),total amino acids(TAA),branched chain amino acids(BCAA),functional amino acids(FAA),and flavor amino acids(DAA)decreased(P<0.05)with increasing dietary ramie.The diet in which 35%of alfalfa was replaced with ramie yielded meat with the highest amino acid content,whereas the fatty acid profile was unaffected by the inclusion of ramie.These results indicate that ramie could be used as a potential dietary forage resource for goats,and that substituting 35%of alfalfa with ramie,which is equivalent to 126 g/kg DM content,would be optimal in terms of goat meat quality.

关键词： Goat Meat quality Ramie Alfalfa carcass

Supplementation of different fat sources affects growth performance and carcass composition of finishing pigs

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Journal of Animal Science and Biotechnology 2018年第4期9卷 949-956页

作者： Yanhong Liu Dong Yong Kil Victor G.Perez-Mendoza Minho Song James E.Pettigrew Department of Animal Science University of CaliforniaDavisCAUSA Department of Animal Sciences University of IllinoisUrbanaILUSA Department of Animal Nutrition and Physiology Chung-Ang UniversityAnseongSouth Korea Pancosma QuincyILUSA Department of Animal Science and Biotechnology Chungnam National UniversityDaejeonSouth Korea

Background: There are various fat sources with different energy values and fatty acid compositions that may affect growth performance and carcass composition of grow-finishing pigs. A higher net energy was recently reported in choice white grease compared with soybean oil. Therefore, two experiments were conducted to determine whether practical responses confirm that difference between choice white grease and soybean oil, and to extend the observations to other fat sources.Results: In Exp. 1, pigs fed fats had lower(P < 0.05) average daily feed intake in phase II and overall period,greater(P < 0.05) gain:feed in phase I, phase II, and overall period than pigs fed the control diet. Pigs fed fats tended(P = 0.057) to have thicker backfat depth at the last rib than those fed control. Pigs fed 6% fats had greater(P < 0.01) gain:feed in phase II and overall period than pigs fed 3% fats. During phase I, pigs fed choice white grease grew faster(P < 0.05) than pigs fed soybean oil. In Exp. 2, pigs fed dietary fats(soybean oil, choice white grease, animal-vegetable blend, palm oil, or tallow) had greater(P < 0.01) gain:feed in each phase and overall period, greater(P < 0.01) average daily gain in phase I, but lower(P < 0.01) average daily feed intake in phase II an overall than pigs fed the control diets. The choice white grease also increased(P < 0.05) average daily gain during phase I compared with soybean oil. Pigs fed palm oil had thicker(P < 0.05) backfat depth at the 10 thrib than those fed soybean oil, animal-vegetable blend, or tallow.Conclusions: Inclusion of 6% dietary fat improved feed efficiency of finishing pigs, while different fats produced different practical results that may be consistent with their different energy values. Results from the early stage indicate that dietary fats with relatively more saturated fatty acids may provide greater energy than those with relatively more unsaturated fatty acids for growing pigs.

关键词： carcass composition Dietary fats Energy values Finishing pigs Growth performance

Effects of melatonin implantation on carcass characteristics, meat quality and tissue levels of melatonin and prolactin in Inner Mongolian cashmere goats

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Journal of Animal Science and Biotechnology 2019年第4期10卷 1081-1088页

作者： Tao Duan Ziyuan Wu Huan Zhang Ying Liu Yan Li Wei Zhang State Key Laboratory of Animal Nutrition College of Animal Science and TechnologyChina Agricultural UniversityBeijing 100193People’s Republic of China Beijing Sunlon Livestock Development Company Beijing 100076People’s Republic of China College of Animal Science Zhejiang UniversityHangzhou 310085People’s Republic of China

Background: Implantation of goats with melatonin can induce cashmere growth and significantly increase cashmere production performance. However, the impact of melatonin implantation on the carcass characteristics,meat quality and related hormone levels in muscle and viscera of cashmere goats has not been studied. This experiment was conducted to determine the effects of melatonin implantation of cashmere goats during the nongrowing period on meat quality and related hormone levels in the tissues. It aimed to provide a theoretical basis for the practical application of melatonin in cashmere goat production systems.Results: Melatonin implantation(2 mg/kg live weight) had no influence(P > 0.05) on daily weight gain, carcass weight, dressing percentage, loin muscle area, or the p H, moisture level, crude fat(except for Gluteus muscle) and amino acid content of muscles of cashmere goats. After implantation for 1 month, shear force of Longissimus dorsi and water loss rate of Longissimus dorsi and Biceps femoris of cashmere goats were increased(P 0.05) on the melatonin or prolactin contents of kidney, heart, spleen, liver, Longissimus dorsi, Biceps femoris and Gluteus muscles. Melatonin content of lung tissue was lowered(P carcass quality. A few meat quality indices i.e., shear force, water loss rate, ∑n-3 PUFA, ∑n-6 PUFA, and crude protein content of Longissimus dorsi;water loss rate, cooking yield and crude protein content of Biceps femoris;ether extract, crude protein content of Gluteus;were affected br

关键词： carcass characteristics Cashmere goat Meat quality Melatonin

Dietary sources and levels of selenium supplements affect growth performance,carcass yield,meat quality and tissue selenium deposition in broilers

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Animal Nutrition 2019年第3期5卷 256-263页

作者： Reza Bakhshalinejad Ahmad Hassanabadi Robert A.Swick Department of Animal Science Faculty of AgricultureFerdowsi University of MashhadMashhad 91775-1163Iran School of Rural Science and Agriculture University of New EnglandArmidaleNSW 2351Australia

This study examined the effects of sources and levels of selenium(Se)on performance,carcass parts yield,meat quality and tissue Se concentration in broilers.A total of 960 one-day-old male broilers were divided into 8 treatments in a 4 x 2 factorial arrangement.Chicks were penned in groups of 20 with6 pens per group.Selenium sources were sodium selenite(SS),Se enriched yeast(SY),DLselenomethionine(SM)and nano-selenium(NS)and dietary supplemental Se levels were 0.1 and0.3 mg/kg diet.The average daily gain(ADG),average daily feed intake(ADFI),feed:gain ratio,mortality,and carcass parts yield were not affected by dietary treatments.The level of 0.3 mg/kg Se decreased lightness and increased yellowness of the breast and thighs(P<0.001).Nano-selenium improved yellowness,redness and meat quality(P<0.05).The interactive effects of sources and the levels of Se affected Se retention(P<0.001).Inorganic Se showed poor retention compared to other sources of Se;and NS showed equal retention with the organic sources.With consideration to meat quality responses,NS had a more signific:ant positive effect compared to SS as an inorganic source of Se.Overall,NS and organic sources of Se resulted in better meat quality compared with the inorganic source.Moreover,the highest Se retention percentage was achieved by supplementation of NS followed by organic sources at0.1 mg/kg compared to SS.

关键词： Broiler chickens Selenium Performance carcass yield Meat quality Selenium retention

Dietary β-glucan supplementation improves growth performance,carcass traits and meat quality of finishing pigs

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Animal Nutrition 2019年第4期5卷 380-385页

作者： Junqiu Luo Dafu Zeng Long Cheng Xiangbing Mao Jie Yu Bing Yu Daiwen Chen Institute of Animal Nutrition Sichuan Agricultural UniversityKey Laboratory of AnimalDisease Resistance NutritionMinistry of EducationChengdu 611130China Sichuan Synlight Biotech Ltd. Chengdu 610041China Faculty of Veterinary and Agricultural Sciences Dookie Campus 3647The University of MelbourneParkvilleVIC3052Australia

This experiment was conducted to investigate growth performance,carcass traits and meat quality of finishing pigs with dietary β-glucan supplementation.A total of 96 healthy pigs(Duroc x Landrace x Yorkshire;initial average BW=25 kg) were randomly allocated into 4 dietary treatments with 6 replicates per treatment and 4 pigs per replicate.The control group was fed a basal diet,and the experimental diets were supplemented with 50,100 and 200 mg/kg Agrobacterium sp.ZX09β-glucan,respectively.The experiment lasted 103 d.The basal diet supplemented with 100 mg/kg β-glucan significantly increased average daily gain and feed conversion ratio,probably due to the improved digestibility of dry matter,gross energy and crude protein(P carcass length(P carcass length,and pork quality of finishing pigs.

关键词： Growth performance β-glucan carcass traits Meat quality Finishing pigs