Subjects: Statistics >> Social Statistics submitted time 2024-05-18 Cooperative journals: 《中国科学院院刊》
Abstract： Digital platform is the most important form of organization in the digital era. How to clarify the boundary between platform autonomy and government regulation so as to exert the order maintenance function of platforms effectively is the key issue in the region of the digital economy governance. This study firstly introduces the basic model of platform autonomy and the regulatory challenges it faces, basing on the background of the emergence of digital platform autonomy. Secondly, through a comparative analysis of the regulatory theories and legal policies of the digital platform autonomy in the European Union and the United States, this study summarizes the advantages and disadvantages of different models. Finally, aiming at the fuzzy boundary of digital platform autonomy in China, as well as the dilemma between over-tolerance and over-regulation in government regulation, on the basis of the reconstruction of the governance boundary, this study puts forward policy recommendations such as changing extensive rigid supervision to prudent and flexible regulation, changing mandatory supervision to cooperative regulation, changing after supervision to whole-process regulation; at the same time, the study proposes to strengthen the compliance capacity building of digital platforms, in order to promote the standardized and healthy sustainable development of China’s platform economy.
Subjects: Digital Publishing >> New Media submitted time 2023-10-08 Cooperative journals: 《中国传媒科技》
Abstract：【目的】信息化时代的到来对新闻行业的发展具有积极促进作用。新闻行业已经逐渐从传统新闻的采集模式转变成了互联网时代的新闻采集模式。在这一背景下，如何快速准确地获取到所需要的新闻素材已经成为当前新闻行业所面临的一个重要问题。【方法】文章结合信息化时代背景，分析新闻素材挖掘技术在新闻行业中的应用场景与应用优势，剖析新闻素材挖掘技术的关键技术，从信息获取、素材处理、媒体监测、舆情分析和事件报道五个方面论述新闻素材挖掘技术的具体应用。【结果】利用相关技术来对海量信息进行挖掘处理，快速准确地获取所需要的新闻素材，提升工作效率。【结论】随着技术的不断进步和创新，新闻素材挖掘技术将会有更多的应用场景得到开发和实现，有效促进我国媒体行业更加健康快速的发展。
Subjects: Medicine, Pharmacy >> Clinical Medicine submitted time 2023-09-21
Abstract： Sarcopenia is a comprehensive disease of aging induced decline in skeletal muscle mass and strength and represents a major health challenge for the elderly. Accumulating evidence suggests that mitochondrial dysfunction plays a key role in the pathogenesis of sarcopenia. Lifestyle interventions, such as exercise, nutrition, and medications for sarcopenia are limited, and solutions to maintain and improve skeletal muscle health are urgently proposed. Mitochondrial transplantation (MTP) is an emerging therapeutic tool for the treatment of tissue damage due to mitochondrial dysfunction. Given the role of mitochondria in skeletal muscle function and metabolism, mitochondrial transplantation may be a novel strategy for the treatment of sarcopenia. In this review, we summarize the mitochondrial related molecular mechanisms leading to sarcopenia, discussing mitochondrial transplantation as a possible therapeutic option.
Peer Review Status:
Awaiting Review
Subjects: Medicine, Pharmacy >> Preventive Medicine and Hygienics submitted time 2023-04-19 Cooperative journals: 《中国全科医学》
KOU, Ruxin
MEI, Kangni
BI, Yuqing
CHEN, Tong
DENG, Shengen
XING, Jiarun
WANG, Qianqian
WANG, Mengxue
LI, Wei
Abstract： Background In recent years，China has attached great importance to strengthening the development of general practitioner（GP）workforce and primary care service system. To innovate the incentive mechanism for GP training and employment and improve the training system for GPs，the government has also promulgated a series of policies and put forward major reform measures involving many aspects. Objective To analyze and evaluate the fairness of distribution of general practitioner（GP）resources in China，and to provide theoretical support for scientific and equitable allocation of GP resources. Methods Data were sourced from five volumes of China Health and Family Planning Statistical Yearbook（2017—2021），China Health Statistical Yearbook（2017—2021），and China Statistical Yearbook（2017—2021）in June 2022，including the number of GPs，the number of people registered as general medicine professionals，the number of people who obtained the General Practitioner Certificate after training，the number of GPs per 10 000 population，and the number of practicing（assistant）physicians in China，in each geographical division（eastern，central or western），and in each regionin，and the annual gross domestic product（GDP），gross regional product（GRP），and the year-end total population data of each region during 2016 and 2020. Additionally，the total land area of each region was extracted from the China ABC column on the website www.gov.cn.The Lorenz curve and the Gini coefficient were used to analyze the fairness in the distribution of GP resources. The Theil index was used to analyze differences in the distribution of GP resources in eastern，central and western China. Results The number of GPs in China increased from 209 083 in 2016 to 408 820 in 2020，showing a growth rate 95.53%. In 2020，the proportion of GPs among all practicing（assistant）physicians reached 10.01%（408 820/4 085 689），and the number of GPs per 10 000 population was 2.9. The Gini coefficients measuring demographic，economic，and geographical distribution inequalities of GP resources were 0.235，0.178，0.722，respectively for 2016，0.231，0.170 and 0.726，respectively for 2017，0.225，0.161 and 0.729，respectively for 2018，0.177，0.147 and 0.714，respectively for 2019，and 0.157，0.136，and 0.707，respectively，for 2020.Overall，the Lorenz curve measuring the inequality in the distribution of GP resources by demographics or economy had lower degree of curvature than that by geography. A reduction was found in Theil index measuring unequal demographic, economic or geographical distribution of GP resources in 2020 compared with that in 2016（from 0.047 to 0.020；from 0.022 to 0.013；from 0.482 to 0.428）. Conclusion During the five years，the distribution of GP resources in China presented the following features：the number of GPs increased rapidly and became an important part of the workforce of practicing（assistant）physicians，the registration rate of GPs gradually increased，and the total GP resources showed a continuous growth，but the ratio of GPs per 10 000 population was still unsatisfactory，great inter-region differences existed in the distribution of GP resources，and the equity of the distribution of GP resources by geography was more unsatisfactory than by demographics or economy.
Subjects: Other Disciplines >> Synthetic discipline submitted time 2023-03-28 Cooperative journals: 《中国科学院院刊》
Abstract： The development and application of science and technology have always been guided by the needs of the country and the demands of the people. Science and technology poverty alleviation is a key part of poverty alleviation. According to the characteristics of poor mountainous areas in China, the Institute of Hydrobiology, Chinese Academy of Sciences has summed up the “poverty alleviation mode of ecological fishery” in poverty alleviation practice, which scientifically use water resources for ecological fish breeding. Reasonable construction of ecological fish communities can ensure water quality and generate income by aquaculture. It will promote the development of aquaculture industry in poor areas and help to complete the task of poverty eradication. This paper summarizes and reflects on the practice of poverty alleviation in the city Enshi of Hubei Province and Liupanshui of Guizhou Province.
Subjects: Psychology >> Social Psychology submitted time 2023-03-28 Cooperative journals: 《心理科学进展》
Abstract： Structural equation modeling (SEM) is an important statistical method in social science research. In the first two decades of the 21st century, great progress has been made in methodological research on SEM in China’s mainland. The publications cover five aspects: model development, parameter estimation, model evaluation, measurement invariance and the special data processing in SEM. SEM development includes the research on measurement models, structural models, and complete models, as well as the SEM in population heterogeneity studies and longitudinal studies. The research on the measurement models involves bi-factor model, exploratory structural equation model, measurement models for special design (e.g., random intercept factor analysis model, fixed-links model, and the Thurston model), and formative measurement models. The research on the structural models involves the actor-partner interdependence model. The research on the complete models focuses on item parceling. The SEM in the study of population heterogeneity involves latent class/profile model, factor mixture model, and multi-level latent class model. The SEM in longitudinal studies includes models describing development trajectories and differences, such as the latent growth model, the piecewise growth model, the latent class growth model, the growth mixture model, the piecewise growth mixture model, the latent transition model and the cross-lagged model. The publications on parameter estimation methods mainly involve the introduction of methodology (including the partial least square method and the Bayesian method) and the comparison of different parameter estimation methods. Advances in the model evaluation include fit indices and their corresponding critical values, selection of fit indices, model evaluation criteria beyond fit indices, and comparison and selection among alternative models. The development of measurement invariance involves three topics: (1) the introduction of different models with testing process and model evaluation criteria for measurement invariance analysis; (2) measurement invariance analysis in a particular model or data (e.g., second order factor model and ordered categorical data); (3) new methods of measurement invariance analysis (e.g., alignment and projection method). In addition, research into special data processing methods in SEM addresses issues of missing data, non-continuous data, non-normal data, and latent variable scores. Finally, recent advances in SEM methodological research abroad are introduced to help researchers understand some cutting-edge topics in this field, which offers implications for future directions of SEM methodological research.
Subjects: Materials Science >> Materials Science (General) submitted time 2023-03-19 Cooperative journals: 《金属学报》
Abstract： In recent years, there have been great efforts focused on joining ceramics to metals to establish processes for a wide range of industrial uses. Several important problems, however, still remain unsolved. Among them, how to produce atomic bonds at ceramic/metal interfaces and how to minimize the residual stress due to large thermal expansion mismatch between two constituents are the most critical. The thermal expansion mismatch effect is a serious problem because, even if a strong interface could be achieved, joints with large residual stress are easily broken. Therefore, it is desirable to reduce the magnitude of the residual stress. Some researchers have succeeded in achieving a strong joint between alumina and stainless steel by using a soft metallic interlayer. In this study, the effects of interlayers of nickel, copper and copper coated with nickel on the microstructure and shear strength of alumina ceramic and 1Cr18Ni9Ti stainless steel bonding with Ag-Cu-Ti filler metal were investigated. The results indicated that, when using copper as an interlayer, sufficient interfacial reaction between the ceramic and the filler metal could obtain. However, when using nickel as an interlayer, resulting in an insufficient reaction between the ceramic and the filler metal and the formation of large amount Ni3Ti intermetallic compounds, and thus, the strength of the joint decreased heavily. It is very interesting that when using copper coated with Ni, the existence of the small amount of nickel didn't affect the activity of titanium in the filler metal, meanwhile, it decreased the effect of the filler metal on the solubility of copper. Compared with copper and Ni interlayer, this interlayer could reduce interfacial residual stress more effectively. And the shear strength of 109 MPa was obtained when the thickness of Cu was 0.2 mm coated with 30 μm thick nickel.
Subjects: Medicine, Pharmacy >> Clinical Medicine submitted time 2023-01-30 Cooperative journals: 《中国全科医学》
Abstract：
Background Chronic diseases have the characteristics of long course and prolongation, and the increase in incidence seriously threatens people's physical and mental health. At present, although some researchers have discussed the influencing factors of the incidence of chronic diseases, there are few studies on the influencing factors of chronic diseases managed by the elderly themselves. Objective To understand the factors affecting the vulnerability of the self-management system of chronic disease in community-based elderly in Shandong Province, and to provide a theoretical basis for improving the self-management level of chronic disease in community-based elderly.Methods A multi-stage stratified random sampling method was used to sample 2650 elderly people over the age of 65 in Shandong Province for a questionnaire survey, and the main influencing factors were identified by comprehensive univariate analysis and multiple stepwise regression analysis.Results In the sensitivity dimension, the influencing factors such as personal characteristics, occupational types, and economic status of the elderly in the community were statistically significant. In the dimension of coping ability, the influencing factors such as self-monitoring, self-cognition, and self-discipline were statistically significant.Conclusion The vulnerability of chronic disease self-management systems for the elderly in the community is influenced by a variety of factors. Activities that include strengthening community health education can be carried out to change the health perceptions of the elderly themselves; Carry out activities to respect and love the elderly and create a good atmosphere for the elderly; Targeted measures such as improving the community's own service capacity and providing more accurate health services to reduce the vulnerability of the chronic disease self-management system for the elderly in the community.
Subjects: Nursing >> Nursing submitted time 2022-11-06
Abstract： Objective To investigate the method and practice management of clinical teaching for nursing students in the endocrinology department of a certain Traditional Chinese Medicine(TCM) hospital, and to provide reference for quality improvement of nursing teaching and practice. Methods According to the method of clinical teaching, Totally 100 nursing students who participated in the internship during June 2019 and June 2021 were divided into the control group (n=20, receiving conventional teaching) and observation group (n=20, receiving case-based teaching). All nursing students participated in the final assessment consisting of theoretical and practical test at the end of internship. A self-made questionnaire was used to investigate the students ‘satisfaction with clinical teaching. Results Nursing students in the observation group achieved higher scores of theoretical and practical tests than those in the control group, with a significant difference (P＜0.01). The score of satisfaction assessment in the observation group were higher than that in the control group, with a significant difference (P＜0.01). Conclusion The case-based teaching method is effective to improve nursing students’ motivation in learning and clinical practice skills.
Peer Review Status:Awaiting Review
Subjects: Psychology >> Statistics in Psychology Subjects: Psychology >> Psychological Measurement submitted time 2022-03-08
Abstract：
In the first two decades of the twenty-first century, the hotspots of the methodological research on structural equation models (SEM) in China's mainland generally involve the following five aspects: model development, parameter estimation, model evaluation, measurement invariance and special data processing. Remarkably, there is more progress in model development (i.e., different variations of SEM) amongst the above aspects. After an overview of the background knowledge of these hotspots, we presented the main research topics and methodological achievements under each hotspot. We also discussed the recent progress of the foreign methodological studies on SEM and the future research directions.
Peer Review Status:Awaiting Review
Subjects: Computer Science >> Integration Theory of Computer Science submitted time 2020-09-28 Cooperative journals: 《计算机应用研究》
Abstract： To improve the channel utilization and throughput performance of cognitive radio networks (CRNs) , this paper proposed a new adaptive spectrum handoff strategy , which emphasized the priority of primary user and considered the influence of the arrival rate of the primary user(PU) on the communication of the secondary user(SU) and limited the interference power of the secondary user to the primary user, and SUs adapted to a reactive or a proactive handoff strategy accordingly. This adaptive handoff strategy established the Markov chains between primary and secondary users, and gave the steady-state probabilities respectively. From the steady-state probability and throughput under different states , derived the analytic expressions of system throughput and channel utilization. And established a Markov chain for the transmission between secondary users, derived the time to transfer control information between secondary users. Numerical results show that the proposed adaptive handoff strategy has higher throughput and channel utilization than the CSMA-based random access approaches, and can be used to derive the time to transfer control information between secondary users.
Subjects: Geosciences >> Other Disciplines of Geosciences submitted time 2019-09-09 Cooperative journals: 《干旱区研究》
Abstract： 为了揭示中亚高山地区大气降水稳定同位素的时空分布特征，开展不同尺度下干旱区水文循环的研究，分析了亚洲中部天山、昆仑山、祁连山地区18个站点的降水氢氧稳定同位素资料。结果表明：天山、昆仑山和祁连山地区降水稳定同位素季节变化较为明显，表现出夏半年高、冬半年低的变化趋势。3个地区降水稳定同位素的空间分布也呈现出显著的季节差异。除昆仑山外，天山和祁连山大气降水线方程的斜率均低于全球大气降水线，说明这些地区的降水受到较强的蒸发影响。研究区各站点降水稳定同位素均呈显著的温度效应，区域内降水量效应不明显。春、夏季昆仑山地区3站点的降水δ18O高程效应较明显，降水δ18O随海拔上升而降低，其余地区没有明显的高程效应。除昆仑山地区西合休外，亚洲高山地区氘盈余(d值)总体表现出冬半年高，夏半年低的变化趋势。
Subjects: Environmental Sciences, Resource Sciences >> Basic Disciplines of Environmental Science and Technology submitted time 2019-08-02 Cooperative journals: 《干旱区地理》
Abstract：干旱作为频发的全球性自然灾害之一，造成了严重的社会、经济和生态环境问题。以西藏主要耕作区为研究区，2001—2015年MODIS、TRMM和SRTM-DEM数据为数据源，利用植被状态指数（VCI）、温度条件指数（TCI）和降水状态指数（PCI）等模型参量，采用空间主成分分析方法构建区域干旱综合监测模型，对模型精度和可靠性进行检核验证，并以所建模型对研究区2001—2015年逐月干旱进行识别，采用地理时空分析方法对研究区干旱变化特征及趋势进行研究。结果表明，干旱综合监测指数（DCMI）能够较好地反映区域土壤相对湿度与标准化降水蒸散指数（SPEI）的变化，干旱综合监测模型具有较好的适用性；研究区全年干旱频率在空间分布上呈现出西高东低的特征，大部分地区干旱频率小于20%，约12.41%的区域干旱频率超过20%；从不同等级干旱发生频率来看，日喀则市为轻旱、中旱易发区，重旱易发区则集中于日喀则市和昌都市的中部及东部地区；区域月际干旱频率空间格局差异较大，全年干旱易发生于1、8、11月等月份，局部地区干旱易发月份存在差异；区域年内旱情变化趋势差异性较大，10月~次年9月，旱情加剧区域呈现出随月份变化由耕作区东部向西部逐渐转移的趋势。
Subjects: Environmental Sciences, Resource Sciences >> Basic Disciplines of Environmental Science and Technology submitted time 2019-06-13 Cooperative journals: 《干旱区地理》
Abstract：基于典型高寒内陆河——提孜那甫河流域的6个不同海拔自设气象站的2012—2016年气温数据，分析了该地区不同海拔区域近地表气温的时间变化特征和空间变异特征。结果表明：（1） 低、中、高山区均温均可被sine函数高度拟合（R2>87%），且随海拔增高气温波动减弱，时间变化延迟，气温变幅差异减小。（2） 日均温与月均温最低值出现月份不同步，且这一情况在海拔相对较高区更易出现。（3） 年内尺度不同区域气温空间差异：D1区（麻扎—库地）在秋、冬季最大；D3区（库地达坂—西合休）在春、夏、秋最小；D4区（西合休/库地达坂—莫木克）在夏季最大，冬季最小；D5区（莫木克—江卡）在春季最大，相关分析结果表明：气温空间分异受海拔影响大。研究结果将对提高高寒山区气候特征认知及改善冰雪水循环模拟具有重要促进意义。
Subjects: Computer Science >> Integration Theory of Computer Science submitted time 2019-01-03 Cooperative journals: 《计算机应用研究》
Abstract： In order to improve the accuracy of radar target recognition, this paper proposes a high resolution range profile (HRRP) recognition method based on deep belief network (DBN) . Firstly, the method uses a restricted Boltzmann machine (RBM) to perform layer-by-layer unsupervised training on HRRP data. The network parameters are updated according to the contrast divergence (CD) algorithm, and the DBN depth is designed by the reconstruction error method. Then, the DBN model parameters are supervised and fine-tuned through a back propagation (BP) mechanism. Finally, based on the model, the classification and recognition of HRRP is realized. The experimental results show that compared with the traditional neural network, the recognition accuracy and noise robustness of the deep belief network based on this paper are significantly improved, and the recognition accuracy can be improved by 8.5%.
Subjects: Computer Science >> Integration Theory of Computer Science submitted time 2018-05-20 Cooperative journals: 《计算机应用研究》
Abstract： In order to solve the problem that the poor tracking accuracy of correlation filter algorithm under occlusion condition, this papre proposed a kernelized correlation filter tracking method using joint multiple blocks estimation. Firstly, it divided the target into several blocks adaptively according to the geometric features of the initial frame tracking box, and each block using the KCF method for tracking independently to get a combined confidence map. Then it took the location and scale of previous frame target as priori information sampling the search area, meanwhile, the weight density of the confidence map in the sample box is used as the observation value, achieve optimal estimation the candidate target using particle filter algorithm. Finally, blocks with lower confidence levels back-project to previous frame for occlusion detection to prevent template update mistakenly. The qualitative and quantitative experiment results shows that compared with the original KCF algorithm, the tracking accuracy of the proposed method improves about 10% and it is robust to occlusion and scale change in some degree.
Subjects: Mechanical Engineering >> Mechanical Manufacture and Automation submitted time 2018-03-16
Abstract：根据移栽蔬菜田间锄草作业工况和要求，基于视觉伺服控制技术，设计了电驱锄草机器人系统。该系统以中小功率拖拉机为配套动力，由伺服电动机驱动月牙形锄草刀护苗锄草和对行，减少了能耗与污染物排放，提高了系统伺服特性。机器视觉系统实时采集田间图像并处理，对作物进行识别与定位。控制器结合视觉系统获取的刀苗距、锄草机器人前进速度、锄刀相位角度及机器人横向偏差信息，利用智能伺服驱动器精确控制锄草刀避苗和对行。试验表明，在前进速度不高于1.5km/h、作物株距不小于0.35m工况下，伤苗率小于10%，田间杂草锄净率约为90%。
Peer Review Status:Awaiting Review
Subjects: Medicine, Pharmacy >> Preclinical Medicine submitted time 2017-12-07 Cooperative journals: 《南方医科大学学报》
Abstract： Objective To investigate the value of the junction fragments between the breakpoints of introns in identifying deletional Duchenne muscular dystrophy (DMD) carriers. Methods A DMD family (including the index patient III2 and the suspected carrier II3) and a sporadic DMD case (including the patient II1 and his mother I2) were studied. The patient III2 of the DMD family was identified as having exons 31-43 deletion of the DMD gene, and the sporadic patient II1 had exons 45-54 deletion. A PCR-based genome-walking method was used to locate the breakpoints in the corresponding introns. The junction fragments of the patients and their female relatives waiting for a diagnosis were amplified by PCR with primers adjacent to the deletion junctions. Results PCR amplification yielded identical positive results for the female suspected carrier II3 of and the index patient of the DMD family, and the former was thus diagnosed as a carrier of DMD. PCR amplification of the sporadic patient’s mother I2 showed a negative result, but the patient II1 had a positive result, so that the patient's mother was excluded as being a carrier of DMD. Conclusion Routine PCR technique for detecting the junction fragments allows identification of carriers among female relatives of patients with deletional DMD.
Subjects: Biology >> Zoology submitted time 2017-10-23 Cooperative journals: 《动物营养学报》
Abstract：本试验旨在比较2种不同剂型酸化剂对哺乳母猪生产性能、初乳成分和肠道菌群结构的影响。试验选择30头体况相近、预产期接近的2～4胎长大二元杂交母猪，随机分成3个组，每组10个重复，每个重复1头母猪。在试验期间各组母猪分别饲喂基础饲粮（对照组）、基础饲粮+0.3%吸附型酸化剂（A组）、基础饲粮+0.1%微囊型酸化剂（B组）。预试期7 d（母猪分娩前7天）、正试期26 d（从母猪分娩开始至泌乳结束）。结果表明：与对照组相比，A组和B组母猪的泌乳期平均日采食量分别提高4.9%（P＞0.05）和5.3%（P＞0.05），仔猪断奶均重分别提高2.6%（P＞0.05）和7.4%（P＜0.05）。A组和B组的母猪初乳中乳脂、乳蛋白、尿氮素、免疫球蛋白G和免疫球蛋白A含量均高于对照组（P＞0.05），而乳糖含量则低于对照组（P＞0.05）。与对照组相比，B组母猪饲粮蛋白质消化率显著提高（P＜0.05），且粪便中大肠杆菌数量显著降低（P＜0.05）；A组母猪粪便中大肠杆菌数量显著降低（P＜0.05）。由此可见，微囊型酸化剂在提高仔猪断奶重以及哺乳母猪饲粮蛋白质消化率和改善肠道菌群结构方面有一定功效，而吸附型酸化剂在改善哺乳母猪肠道菌群结构方面有一定功效。
Subjects: Biology >> Zoology submitted time 2017-10-10 Cooperative journals: 《动物营养学报》
Abstract：本文旨在研究在基础饲粮中添加过瘤胃蛋氨酸（RPMet）、过瘤胃赖氨酸（RPLys）对荷斯坦奶公牛生长性能和胴体化学成分的影响，探讨用RPMet和RPLys替代部分饲粮粗蛋白质的可行性。试验采用完全随机设计，选择12月龄左右，体重、体尺相近的健康奶公牛25头，随机分为5组，每组5头。对照组饲喂基础饲粮，4个试验组M15、L30、M15+L30、LCP组分别在基础饲粮中添加RPMet 15 g/d、RPLys 30 g/d、RPMet 15 g+RPLys 30 g/d、RPMet 15 g+RPLys 30 g/d（同时降低饲粮粗蛋白质2.20%）。预试期10 d，正试期150 d。结果表明，与对照组相比：1）基础饲粮中添加RPMet和RPLys对奶公牛干物质采食量无显著影响（P＞0.05）；L30、M15+L30、LCP组末重和平均日增重显著增加（P＜0.05），且均以M15+L30组最高，但M15+L30组与LCP组无显著差异（P＞0.05）；M15+L30和LCP组料重比显著降低（P＜0.05），以M15+L30组最低，这2组间差异不显著（P＞0.05）。2）M15+L30和LCP组奶公牛胸围和胴体中粗蛋白质含量显著提高（P＜0.05），这2组间差异不显著（P＞0.05）。3）M15+L30和LCP组奶公牛胴体中必需氨基酸苏氨酸、亮氨酸、精氨酸的含量显著提高（P＜0.05），这2组间差异不显著（P＞0.05），M15+L30组异亮氨酸含量显著提高（P＜0.05）；M15+L30和LCP组奶公牛胴体中非必需氨基酸中天冬氨酸、丝氨酸、谷氨酸、甘氨酸、丙氨酸、半胱氨酸、脯氨酸以及总氨基酸含量显著提高（P＜0.05），L30和M15+L30组酪氨酸含量显著提高（P＜0.05），这2组间均无显著差异（P＞0.05）。由此可见，饲粮中添加RPMet和RPLys在一定程度上提高了奶公牛的生长性能，增加胴体中蛋白质的合成和氨基酸沉积，且添加RPMet 15 g+RPLys 30 g/d能够在一定程度上替代部分饲粮粗蛋白质（2.20%）。
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