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拜城油鸡公鸡A-FABP基因多态性及其与生产性能的相关性分析

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中国畜牧兽医 2017年第1期44卷 141-147页

作者：邵勇钢臧长江曾伟丹王彦钦新疆农业大学动物科学学院乌鲁木齐830052

试验旨在研究拜城油鸡公鸡中脂肪型脂肪酸结合蛋白(adipocyte fatty acid binding protein,A-FABP)基因的多态性及其与生产性能的相关性,寻找可用于拜城油鸡选育的分子遗传标记。随机选取92只6周龄拜城油鸡公鸡,采用PCR-RFLP方法检测A-F... 详细信息

试验旨在研究拜城油鸡公鸡中脂肪型脂肪酸结合蛋白(adipocyte fatty acid binding protein,A-FABP)基因的多态性及其与生产性能的相关性,寻找可用于拜城油鸡选育的分子遗传标记。随机选取92只6周龄拜城油鸡公鸡,采用PCR-RFLP方法检测A-FABP基因的多态性。每种基因型选取15只体重相近的个体随机分为3组,每组每种基因型个体各5只,分别在12、18、24周龄时屠宰并对生产性能指标进行测定。结果显示,在拜城油鸡公鸡中检测到A-FABP基因有3种基因型:AA、AB、BB,BB为优势基因型,B为优势等位基因,不符合哈代-温伯格平衡定律(P0.05);18周龄时,BB基因型肌间脂宽显著高于AA基因型(P<0.05),BB和AB基因型腹脂重极显著高于AA基因型(P<0.01),腹脂率显著高于AA基因型(P<0.05);24周龄时,BB基因型体重、肌间脂宽、腹脂重均显著高于AA基因型(P<0.05)。推测A-FABP基因可以作为与拜城油鸡公鸡脂肪性状相关的候选标记之一。

关键词：拜城油鸡 A-FABP基因多态性生产性能

Genesis of geothermal water in the hinterland of Guanzhong Basin， China: Insight from hydrochemical and isotopic analysis

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Journal of Earth Science 2025年

作者： Jiangxia Wang Panpan Xu Hui Qian yongqi zang Qiming Wang Zhiyuan Ma School of Water and Environment， chang'an University Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of the Ministry of Education， chang'an University Key Laboratory of Eco-hydrology and Water Security in Arid and Semi-arid Regions of Ministry of Water Resources， chang'an University

The Guanzhong Basin， located in Shaanxi Province， China， has abundant geothermal resources in its hinterland. Focusing on typical thermal reservoir structural units， namely the Xianli fault-step (XL) and Xi'an depression (XA)， this study reveals the genesis of geothermal water by combining hydrochemistry and environmental isotopes. The geothermal waters of XL uniformly correspond to the Na-Cl type with high contents of major ions， while the geothermal water of XA has complex hydrochemical types. The quartz geothermometer (with maximum steam loss) and Na-K-Ca geothermometer are recommended for XL and the quartz geothermometer (with no and maximum steam loss) and Na-K geothermometer for XA. Their temperature ranges are 99-159℃ and 93-146℃， respectively. The circulation depth of geofluids in XL and XA range from 2579 to 4766 m and from 2541 to 4330 m， with mean apparent ages of 21543 and 20345 yr B.P.， respectively. The geothermal water in XL originates from a mixture of sedimentary water and ancient infiltration water， and its formation mode was the vertical heat conduction with cooling process. In contrast， the geothermal water in XA originates from the dual process of cooling and mixing， with the process being dominated by ancient infiltration water and supplementation by modern infiltration water.

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Stepwise assembly to construct stable copper(I) cluster-based circularly polarized luminescent MOFs

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Science China Chemistry 2025年

作者： Jing-Wen Xie Meng-Ting Wang Yan Jin Si Li Jian-Hua Qin Shuang-Quan zang Tomas C.W.Mak College of Chemistry Henan Key Laboratory of Crystalline Molecular Functional Materials Zhengzhou University College of Chemistry and Chemical Engineering Luoyang Normal University Department of Chemistry The Chinese University of Hong Kong

Circularly polarized luminescence （CPL） materials have been extensively studied in recent years owing to their widespread applications in 3D display,optical storage,optical anti-counterfeiting,and biological imaging,***（I） clusters have emerged as a promising candidate for CPL materials,driven by their cost-effectiveness,superior luminescent properties,precise structure,and low ***,the poor environmental stability of copper（I） clusters renders their synthesis and preservation challenging,thereby significantly impeding their ***,we have designed and synthesised a chiral double-coordinated ligand in order to construct copper（I） cluster nodes that can be further *** anticipated,by utilizing stepwise assembly strategy,a Cu4cluster node co-modified by chiral alkynyl ligands and triphenylphosphine was further assembled with Cd2+ions to obtain 2D layers structure,L/*** L/D-Cu4-Cd exhibits excellent stability and optical properties,including bright yellow emission,solvent-responsive luminescence,and CPL activity with a maximum glumup to 2.0×10-3,which shows potential applications in the WLED and *** interestingly,the material also exhibits deflection ability towards different wavelengths of linearly polarized light,showing certain potential in the preparation of circular polarizer.

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New Discovery of Holocene Activity along the Weixi-Qiaohou Fault in Southeastern Margin of the Tibetan Plateau and its Neotectonic Significance

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Acta Geologica Sinica(English Edition) 2018年第6期92卷 2464-2465页

作者： chang Zufeng zang Yang and chang Hao Yunnan Earthquake Agency Kunming650224China

Objective The lateral extrusion eastward of the Tibetan Plateau leads to the formation of the Sichuan–Yunnan block, which is the most representative active block in the southeastern margin of the Tibetan Plateau, characterized by strong and frequent seismicity(Li Ping et al., 1975; Zhang Peizhen et al., 2003; Li yong et al., 2017). Its eastern boundary is composed of sinistral faults including the Xianshuihe, Xiaojiang faults, etc., and the western

关键词： New Discovery of Holocene Activity along the Weixi-Qiaohou Fault in Southeastern Margin of the Tibetan Plateau and its Neotectonic Significance

Study on performance degradation and failure analysis of machine gun barrel

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Defence Technology（防务技术） 2020年第2期16卷 362-373页

作者： Xiaolong Li Lei Mu yong zang Qin Qin School of Mechanical Engineering University of Science and Technology BeijingBeijing100083China

An increase in the use of the gun barrel will cause wear of the inner wall,which reduces the muzzle velocity and the spin rate of the *** off-bore flight attitude and trajectory of the projectile also change,affecting the shooting power and the *** ballistic data of a high-speed spinning projectile are required to study the performance ***,based on the barrel’s accelerated life test,the whole process of projectile shooting is reproduced using numerical simulation technology,and key information on the ballistic performance change at each shooting stage are *** have shown that in the later stages of barrel shooting,the accuracy of shooting has not decreased ***,it is found that the angle of attack of the projectile increases as the wear of the barrel *** maximum angle of attack reaches 0.106 rad when the number of shots reaches ***,elliptical bullet hole has appeared on the target at this shooting *** combining external ballistic theory with simulation results,the primary reason of this phenomenon is found to be a significant decrease in the muzzle spin rate of the *** the end of the barrel life,the projectile muzzle spin rate is 57.5%lower than that of a barrel without wear.

关键词： Wear of the inner wall Accelerated life test Numerical simulation Ballistic performance End of the barrel life

Model for the Whole Roller Leveling Process of Plates with Random Curvature Distribution Based on the Curvature Integration Method

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Chinese Journal of Mechanical Engineering 2019年第3期32卷 145-155页

作者： Ben Guan Chao Zhang yong zang Yuan Wang School of Mechanical Engineering University of Science and Technology BeijingBeijing 100083China Institute of Artificial Intelligence University of Science and Technology BeijingBeijing 100083China

A model based on the curvature integration method has been applied in an online plate leveling system. However, there are some shortcomings in the current leveling models. On the one hand, the models cannot deal with the leveling process of plates with a random curvature distribution. On the other hand, the current models are suitable only for stable leveling processes and ignore the biting in and tailing out stages. This study presents a new plate-leveling model based on the curvature integration method, which can describe the leveling process of plates with random curvature distribution. Further, the model is solved in two cases in order to take the biting in and tailing out stages into consideration. The proposed model is evaluated by comparing with a plate leveling experiment. Finally, the leveling process of a plate with a wave bent is studied using the proposed model. It is found that the contact angles vary greatly during the biting in and tailing out stages. However, they are relatively steady during the 5 roller leveling stage. In addition, the contact angle of roller No. 2 is the smallest, which is close to 0. Roller leveling can effectively eliminate bending in the plate, but there are regions in the head and tail of the plate, where roller leveling is not effective. The non-leveling region length is about 2 times that of the roller space. This study proposes a quasi-static plate-leveling model, which makes it possible to analyze the dynamic straightening process using a curvature integration method. It also makes it possible to analyze the straightening process of a plate with random curvature distribution.

关键词： Leveling Curvature integration method Curvature Contact angle Deflection

Tandem Strip Mill's Multi-parameter Coupling Dynamic Modeling Based on the Thickness Control

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Chinese Journal of Mechanical Engineering 2015年第2期28卷 353-362页

作者： PENG Yan ZHANG Yang SUN Jianliang zang yong National Engineering Research Center for Equipment and Technology of Cold Rolling Strip Yanshan University School of Mechanical Engineering University of Science and Technology Beijing

The rolling process is determined by the interaction of a number of different movements,during which the relative movement occurs between the vibrating roll system and the rolled piece,and the roll system＇s vibration interacts with the strip＇s deformation and rigid *** many parameters being involved leads to a complex mechanism of this coupling *** testing and analyzing the vibration signals of the mill in the rolling process,the rolling mill＇s coupled model is established with comprehensive consideration of the coupling interaction between the mill＇s vertical vibration,its torsional vibration and the working roll＇s horizontal vibration,and vibration characteristics of different forms of rolling mill＇s vibration are analyzed under the coupling *** comprehensive attention to the relationship between the roll system,the moving strip and the rolling parameters＇dynamic properties,and also from the strip thickness control point of view,further research is done on the coupling mechanism between the roll system＇s movement and the moving strip＇s characteristics in the rolling *** a result,the law of inertial coupling and the stiffness coupling effect caused by different forms of the roll system＇s vibration is determined and the existence of nonlinear characteristics caused by the elastic deformation of moving strip is also ***,a multi-parameter coupling-dynamic model is established which takes the tandem strip mill as its research object by making a detailed kinematics analysis of the roll system and using the principle of virtual *** coupling-dynamic model proposes the instruction to describe the roll system＇s movement,and analyzes its dynamic response and working stability,and provides a theoretical basis for the realization of the strip thickness＇dynamic control.

关键词： tandem strip mill dynamic characteristics moving strip roll system

Roll System and Stock's Multi-parameter Coupling Dynamic Modeling Based on the Shape Control of Steel Strip

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Chinese Journal of Mechanical Engineering 2017年第3期30卷 614-624页

作者： Yang ZHANG Yan PENG Jianliang SUN yong zang National Engineering Research Center for Equipment and Technology of Cold Rolling Strip Yanshan University School of Mechanical Engineering University of Science and Technology Beijing

The existence of rolling deformation area in the rolling mill system is the main characteristic which dis- tinguishes the other machinery. In order to analyze the dynamic property of roll system＇s flexural deformation, it is necessary to consider the transverse periodic movement of stock in the rolling deformation area which is caused by the flexural deformation movement of roll system simul- taneously. Therefore, the displacement field of roll system and flow of metal in the deformation area is described by kinematic analysis in the dynamic system. Through intro- ducing the lateral displacement function of metal in the deformation area, the dynamic variation of per unit width rolling force can be determined at the same time. Then the coupling law caused by the co-effect of rigid movement and flexural deformation of the system structural elements is determined. Furthermore, a multi-parameter coupling dynamic model of the roll system and stock is established by the principle of virtual work. More explicitly, the cou- pled motion modal analysis was made for the roll system. Meanwhile, the analytical solutions for the flexural defor- mation movement＇s mode shape functions of rolls are discussed. In addition, the dynamic characteristic of the lateral flow of metal in the rolling deformation area has been analyzed at the same time. The establishment ofdynamic lateral displacement function of metal in the deformation area makes the foundation for analyzing the coupling law between roll system and rolling deformation area, and provides a theoretical basis for the realization of the dynamic shape control of steel strip.

关键词： Roll system Rolling deformation area Coupling dynamic model Mode shape function - Lateraldisplacement function

Energy Storage Properties of Phase change Materials Prepared from PEG/CPP

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Chinese Chemical Letters 2005年第10期16卷 1375-1378页

作者： Ya Nan zang En yong DING Key Laboratory of Cellulose and Lignocellulosics Chemistry Guangzhou Institute of Chemistry Chinese Academy of Sciences Guangzhou 510650 Graduate School of the Chinese Academy of Sciences Beijing 100039

New kinds of solid-solid phase change materials have been prepared in our laboratory. In these materials, the rigid polymer chlorinated polypropylene is taken as skeletons and the flexible polymer polyethylene glycol 6000 and polyethylene glycol 10000 are taken as functional chains. Results show that chlorinated polypropylene grafted by polyethylene glycol 10000 has greater enthalpy than chlorinated polypropylene grafted by polyethylene glycol 6000.

关键词： Polyethylene glycol chlorinated polypropylene phase change materials.