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Stage-specific nutritional management and developmental programming to optimize meat production

Journal of Animal Science and Biotechnology 2023年第2期14卷 451-464页

作者： Liang Zhao xiangdong Liu Noe A Gomez Yao Gao Jun Seok Son Song Ah Chae Mei‑Jun Zhu Min du College of Animal Science and Technology Nanjing Agricultural University210095 NanjingPR China Nutrigenomics and Growth Biology Laboratory Department of Animal SciencesWashington State UniversityWA 99164 PullmanUSA Laboratory of Perinatal Kinesioepigenetics Department of ObstetricsGynecology and Reproductive SciencesUniversity of Maryland School of MedicineMD 21201 BaltimoreUSA School of Food Science Washington State UniversityWAPullmanUSA.

Over the past few decades,genetic selection and refined nutritional management have extensively been used to increase the growth rate and lean meat production of ***,the rapid growth rates of modern breeds are often accompanied by a reduction in intramuscular fat deposition and increased occurrences of muscle abnor‑malities,impairing meat quality and processing *** stages of animal development set the long‑term growth trajectory of ***,due to the seasonal reproductive cycles of ruminant livestock,gestational nutrient deficiencies caused by seasonal variations,frequent droughts,and unfavorable geological locations nega‑tively affect fetal development and their subsequent production efficiency and meat ***,enrolling live‑stock in nutritional intervention strategies during gestation is effective for improving the body composition and meat quality of the offspring at *** crucial early developmental stages include embryonic,fetal,and postnatal stages,which have stage‑specific effects on subsequent offspring development,body composition,and meat *** review summarizes contemporary research in the embryonic,fetal,and neonatal development,and the impacts of maternal nutrition on the early development and programming effects on the long‑term growth performance of *** the developmental and metabolic characteristics of skeletal muscle,adipose,and fibrotic tissues will facilitate the development of stage‑specific nutritional management strategies to optimize production efficiency and meat quality.

关键词： Adipose tissue Embryonic development Fetal programming Fibro/adipogenic progenitors Marbling Nutritional regulations Skeletal muscle

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Energy-Efficient Multi-Mode Clusters Maintenance(M^2CM) for Hierarchical Wireless Sensor Networks

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China Communications 2017年第6期14卷 1-12页

作者： xiangdong Hu Zhulin Liu College of Automation Chongqing University of Posts and Telecommunications Chongqing 400065 China

How to energy-efficiently maintain the topology of wireless sensor networks(WSNs) is still a difficult problem because of their numerous nodes,highly dynamic nature,varied application scenarios and limited *** energy-efficient multi-mode clusters maintenance(M2CM) method is proposed based on localized and event-driven mechanism in this work,which is different from the conventional clusters maintenance model with always periodically re-clustered among the whole network style based on time-trigger for hierarchical WSNs.M2 CM can meet such demands of clusters maintenance as adaptive local maintenance for the damaged clusters according to its changes in time and space field.,the triggers of M2 CM include such events as nodes' residual energy being under the threshold,the load imbalance of cluster head,joining in or exiting from any cluster for new node or disable one,*** on neighboring relationship of the damaged clusters,one can start a single cluster(inner-cluster) maintenance or clusters(inter-cluster) maintenance program to meet diverse demands in the topology management of hierarchical *** experiment results based on NS2 simulation show that the proposed method can significantly save energy used in maintaining a damaged network,effectively narrow down the influenced area of clusters maintenance,and increase transmitted data and prolong lifetime of network compared to the traditional schemes.

关键词： hierarchical iterative clustering multi-mode event-driven adaptive energy-efficient

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Special Lateral Increase in a Permian Rugose Coral Kepingophyllum aksuence Wu et Chow

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Acta Geologica Sinica(English Edition) 2011年第2期85卷 465-470页

作者： ZHANG Feng WANG xiangdong Chongqing Museum of Natural History Chongqing 400700 China Graduate School of the Chinese Academy of Sciences Beijing 100049 China State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and Palaeontology the Chinese Academy of Sciences Nanjing 210008 China

Well-preserved specimens of Kepingophyllum aksuence Wu et Chow were collected from Early Permian strata in western Tarim Basin, Xinjiang. More than 100 serial thin sections were made for this study. Kepingophyllum aksuence displays a unique increase pattern. The bud appears in lonsdaleoid dissepiments between the corallites where the wall of parent corallite disappears and the area becomes aphroid. This increase pattern is different from other lateral increases of most colonial rngose corals, and therefore has taxonomic significance to differentiate Kepingophyllidae from other compound rugose corals. It is also discussed that Kepingophyllum aksuence has a high ＂reproductive integration＂, which means a rapid growth of buds during the offsetting process. Kepingophyllum was possibly originated from Ivanovia and was also a probable ancestor of Wentzellophyllum, which is supported here by more or less the similarity of the blastogeny in different stages of three taxa.

关键词： Coral Kepingophyllum aksuence lateral increase blastogeny taxonomy evolution

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MANUFACTURER'S UNIFORM PRICING AND CHANNEL CHOICE WITH A RETAIL PRICE MARKUP COMMITMENT STRATEGY

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Journal of Systems Science and Systems Engineering 2014年第1期23卷 111-126页

作者： Huihui Liu Ming Lei xiangdong Liu Guanghua School of Management Peking University China Center for International Economic Exchanges

The paper studies channel choice decisions in a multi-channel supply chain under a strategy where there is an ex-ante commitment made on the retail price markup. The market demand is uncertain and dependent on the price and sales efforts. The results show that in any channel structure, when making order decisions the retailer only examines the price ratio and the fluctuation size of random demand, rather than the channel cost and the retailer＇s marketing efficiency. When the retail price rises, the manufacturer is willing to increase inventory quantity for direct sales, because the manufacturer＇s profit margin is higher in direct channel. The increase in demand fluctuation only affects the degree of channel preference but doesn＇t change the manufacturer＇s channel choice. No matter in which level the price ratio is, when the sales efficiency of retail channel is not high or the demand proportion of direct channel is low, the manufacturer and the retailer will be both apt to choose a dual-channel structure. Then adding a direct channel becomes a marketing strategy, rather than a competitor of the retail channel, and helps the supply chain win more market demand.

关键词： Uniform pricing marketing/sales effort channel choice newsvendor model dual channelsupply chain

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Disturbance observer based time-varying sliding mode control for uncertain mechanical system

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Journal of Systems Engineering and Electronics 2012年第1期23卷 108-118页

作者： Binglong Cong xiangdong Liu Zhen Chen School of Automation Beijing Institute of Technology Beijing 100081 P. R. China Key Laboratory for Intelligent Control ＆ Decision on Complex Systems Beijing Institute of Technology Beijing 100081 P. R. China

It is now well known that the time-varying sliding mode control （TVSMC） is characterized by its global robustness against matched model uncertainties and disturbances. The accurate tracking problem of the mechanical system in the presence of the parametric uncertainty and external disturbance is addressed in the TVSMC framework. Firstly, an exponential TVSMC algorithm is designed and the main features are analyzed. Especially, the control parameter is obtained by solving an optimal problem. Subsequently, the global chattering problem in TVSMC is considered. To reduce the static error resulting from the continuous TVSMC algorithm, a disturbance observer based time-varying sliding mode control （DOTVSMC） algorithm is presented. The detailed design principle and the stability of the closed-loop system under the composite controller are provided. Simulation results verify the effectiveness of the proposed algorithm.

关键词： mechanical system time-varying sliding mode control (TVSMC) global sliding phase global chattering disturbance observer.

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Application of subfossil cladocerans(water fleas) in assessing ecological resilience of shallow Yangtze River floodplain lake systems(China)

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Science China Earth Sciences 2018年第9期61卷 1157-1168页

作者： Giri KATTEL Ke ZHANG xiangdong YANG State Key Laboratory of Lake Science and Environment Nanjing Institute of Geography and LimnologyChinese Academy of Sciences Environmental Hydrology and Water Resources Group Department of Infrastructure EngineeringThe University of Melbourne

Majority of shallow floodplain lake ecosystems of the middle and lower reaches of the Yangtze River(China) have gone through serious eutrophication problems over the recent past. The severe environmental deterioration accompanied by cyanobacterial blooms have become major water resource management challenges in the region. An advanced research method is urgently needed to tackle these challenges. The concept of ecological resilience address pressing questions of non-linear dynamics, threshold effects and regime shifts in shallow floodplain lakes, and help manage the ecosystem effectively. Palaeolimnological techniques are important for assessing long term resilience and associated thresholds effects of shallow lake ecosystems. However, the lack of reliable proxy methods available, the assessment of long term ecological resilience of shallow Yangtze River lake systems has become increasingly difficult. Cladocerans(water fleas) play a central role in lacustrine food webs by responding to external drivers and internal ecosystem processes in lakes. Their subfossils are well preserved and becoming one of potential proxy indicators of lake ecosystems change for a longer time scale. This study explores the potential application of subfossil cladocerans and their ephippia in assessing a long term ecological resilience and help better management strategies of lake ecosystems and water resources of the middle and lower reaches of the Yangtze River in China.

关键词： Subfossil cladoceran Yangtze River lake system Food web Ecological resilience Regime shift Threshold

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交通场景下的大型车辆右转停车检测方法研究

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计算机工程与应用 2025年第1期61卷 352-360页

作者：王依凡董振江陈向东南京邮电大学计算机学院南京210023

随着大型车辆右转必停的新交规逐步实施,针对现有的监管方式存在效率较低的问题,提出了一种大型车辆右转停车检测方法。对YOLOv7-tiny检测模型进行改进,在ELAN模块中引入注意力机制,以提升大型车辆的检测性能。设计了一种新的大型车辆... 详细信息

随着大型车辆右转必停的新交规逐步实施,针对现有的监管方式存在效率较低的问题,提出了一种大型车辆右转停车检测方法。对YOLOv7-tiny检测模型进行改进,在ELAN模块中引入注意力机制,以提升大型车辆的检测性能。设计了一种新的大型车辆右转车道定位方法,通过自适应探测车道,提高了其在不同监控视角下的定位准确性。对大型车辆的运动轨迹进行序列数据转换,并采用结合加权平均的中值滤波算法,有效降低了原始数据的噪声。在滑动窗口损失函数中引入权重因子,进一步提升了检测方法的鲁棒性。实验结果表明,改进后的大型车辆检测模型在自制数据集和公开数据集上均取得了性能提升,大型车辆右转车道定位方法具有更强的泛化能力,并且检测到的停车时间覆盖率达到了97.4%。

关键词：大型车辆检测车道定位滤波算法损失函数停车时间检测

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Trajectory reshaping based guidance with impact time and angle constraints

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Chinese Journal of Aeronautics 2016年第4期29卷 984-994页

作者： Zhao Yao Sheng Yongzhi Liu xiangdong School of Automation Beijing Institute of Technology Key Laboratory for Intelligent Control and Decision of Complex Systems Beijing Institute of Technology

This study presents a novel impact time and angle constrained guidance law for homing missiles. The guidance law is first developed with the prior-assumption of a stationary target, which is followed by the practical extension to a maneuvering target scenario. To derive the closed-form guidance law, the trajectory reshaping technique is utilized and it results in defining a specific polynomial function with two unknown coefficients. These coefficients are determined to satisfy the impact time and angle constraints as well as the zero miss distance. Furthermore, the proposed guidance law has three additional guidance gains as design parameters which make it possible to adjust the guided trajectory according to the operational conditions and missile's capability. Numerical simulations are presented to validate the effectiveness of the proposed guidance law. (C) 2016 Chinese Society of Aeronautics and Astronautics. Production and hosting by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license.

关键词： Guidance Homing missiles Impact angle Impact time Trajectory reshaping

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Impact of preparation conditions on hydrogen storage performance of metallic Ti-doped NaAlH_4

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Rare Metals 2006年第z1期25卷 266-272页

作者： KANG xiangdong WANG Ping CHENG Huiming Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China

Contrary to the popular opinion, it has been found that metallic Ti powder can be directly utilized as dopant precursor to prepare catalytically enhanced NaAlH4 through mechanical milling. As a novel method for preparation of catalytically enhanced NaAlH4, direct metallic Ti-doping possesses practical advantage over the state-of-the-art doping technology: elimination of the inactive by-products and the gas impurities that are highly detrimental to fuel cell operation. A systematic investigation along this new approach was performed under various preparation conditions, including different starting materials, milling atmosphere and milling time. The materials thus prepared under different conditions were found to share some common features, while at the meantime, differ significantly from each other on hydrogen storage performance. A comprehensive understanding of these results provides valuable insight into a series of fundamental questions in catalytically enhanced Ti-NaAlH4 system.

关键词： hydrogen storage materials NaAlH4 metallic Ti precursor

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Stochastic maximum principle for partially observed forward-backward stochastic differential equations with jumps and regime switching

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Science China(Information Sciences) 2018年第7期61卷 106-118页

作者： Shuaiqi ZHANG Jie XIONG xiangdong LIU School of Economics and Commerce Guangdong University of Technology Department of Mathematics University of Macau Department of Mathematics Southern University of Science and Technology Department of Statistics Jinan University

In this article, we consider the partially observed optimal control problem for forward-backward stochastic systems with Markovian regime switching. A stochastic maximum principle for optimal control is developed using a variational method and filtering technique. Our theoretical results are applied to the motivating example of the risk minimization for portfolio selection.

关键词： partial information Markovian regime-switching stochastic maximum principle forwardbackward stochastic differential equation(FBSDE)

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