Subjects: Other Disciplines >> Synthetic discipline submitted time 2023-03-28 Cooperative journals: 《中国科学院院刊》
Abstract： The development of scientific research in the Guangdong-Hong Kong-Macao Greater Bay Area is unbalanced and inadequate, and its contribution to technological innovation is insufficient to meet the huge demand for industrial innovation in the Greater Bay Area. This paper tries to clarify the coordination relationship between scientific research and industrial innovation in the Guangdong-Hong Kong-Macao Greater Bay Area since 1997 by constructing the scientific research-industrial innovation coordination data sets, correlation index and relative development index for ten industries in the area. This paper analyzes the evolution and interaction rules of scientific research and industrial innovation in the Guangdong-Hong Kong-Macao Greater Bay Area, and puts forward corresponding countermeasures. The research found that scientific research and industrial innovation in the Guangdong-Hong Kong-Macao Greater Bay Area showed an overall upward trend while the coordinating level varies from industry to industry. Among the ten industries analyzed in this paper, communication technology and integrated circuit have reached a high level of coordination; marine engineering equipment is still in the primary coordination stage; and other industries are at a good level of coordination. The scale advantage and competitive advantage of scientific research are dynamic for the improvement of coordination level, which suggests that we should combine the scale effect and competitive advantage of innovation, pay high attention to originality and leadership, and strive to form the special and preponderant advantage of regional scientific research.
Subjects: Other Disciplines >> Synthetic discipline submitted time 2023-03-28 Cooperative journals: 《中国科学院院刊》
Abstract： In the Outline Development Plan for the Guangdong-Hong Kong-Macao Greater Bay Area, it is pointed out that the Guangdong-Hong Kong-Macao Greater Bay Area (GBA) should “develop a vibrant and internationally competitive first-class bay area and world-class city cluster, and build a role model of high-quality development.” This study compares the industrial development of GBA and three other world-class bay areas. It is found that GBA possesses the fundamental conditions for developing into an international first-class bay area in total scale, but the equality of economic growth is not high. Regionalization and industrialization are the main characteristics of the area, and the high-end service industry has huge development space. The industrial segmentation pattern between Hong Kong, Macao and nine cities of Guangdong is serious, and the cooperation potential is great. Therefore, the industrial isomorphism between nine cities of Guangdong Province needs to be further coordinated and solved. In the future, it is necessary to further promote regional coordinated development and enhance the international competitiveness and influence of the bay area through expanding opening-up.
Subjects: Biology >> Zoology submitted time 2018-12-24 Cooperative journals: 《动物营养学报》
Abstract：本试验旨在研究全混合日粮粗饲料水平对奶牛挑食行为、瘤胃内环境及血清指标的影响。选用12头泌乳中期[泌乳时间（119±26） d]经产荷斯坦奶牛[体重（629±46） kg]，随机分为4组，每组中1头安装瘤胃瘘管，按4×4拉丁方设计，饲喂粗饲料水平分别为40%、50%、60%和70%（干物质基础）的4种全混合日粮。共进行4期动物试验，每期试验21 d。结果表明：饲粮粗饲料水平对奶牛挑食行为有显著（P40%时，奶牛喜食粒度0.05）。随饲粮粗饲料水平的增加，瘤胃液外流速度和瘤胃固相外流速度显著线性增加（P0.05）；血清胰岛素样生长因子-1（IGF-1）含量显著线性增加（P<0.01），瘦素（LEP）和非酯化脂肪酸（NEFA）含量有线性增加趋势（0.05≤P<0.10），血清生长激素（GH）和胰岛素（INS）含量有线性降低的趋势（0.05≤P<0.10）。综上所述，饲粮粗饲料水平是影响奶牛挑食行为、瘤胃内容物及血清指标的重要因素。
Subjects: Biology >> Zoology submitted time 2017-10-10 Cooperative journals: 《动物营养学报》
Abstract：本试验旨在研究全混合日粮（TMR）饲喂泌乳奶牛群摄入养分偏离的原因分析及对生产性能的影响。选取30个高产牛群，每个牛群采样5 d。采取牛群TMR及剩料样品，进行养分分析和颗粒分级评定，计算各指标的变异系数。记录产奶量，取奶样测乳成分。多元线性回归分析养分、颗粒的变异系数与牛群生产性能的关系。结果表明：30个牛群饲喂的TMR产奶净能（NEL）和粗蛋白质（CP）、中性洗涤纤维（NDF）、酸性洗涤纤维（ADF）、微生物蛋白质（MCP）、瘤胃非降解蛋白质（RUP）、瘤胃能氮平衡（RENB）、小肠可消化粗蛋白质（DCPSI）、钙（Ca）含量分别为6.56 MJ/kg和16.22%、35.71%、21.38%、77.84 g/kg、92.15 g/kg、14.77 g/kg、104.04 g/kg、1.43%，其中高于配方目标的指标有NDF(1.94%)、Ca(0.57%)、RUP（5.03 g/kg）、RENB（6.95 g/kg），低于配方目标的指标有CP(-0.36%)、ADF(-1.54%)、NEL(-0.12 MJ/kg)、MCP(-7.71 g/kg)、DCPSI(-2.12 g/kg)（正值表示提高，负值表示降低）。观测期内，RUP[（16.26±7.10）%]、MCP[(22.78±13.38)%]、RENB[(64.29±34.29)%]3种养分的变异系数大于10%，其他养分的变异系数均小于10%。长、中、短、细4类颗粒含量的变异系数分别为(15.78±9.25)%、(9.12±7.86)%、(6.00±4.00)%、(11.15±9.62)%。回归分析表明，TMR养分和颗粒度变异影响产奶量和乳成分，NEL变异系数每升高1个百分点，产奶量下降3.662 kg/d；长颗粒变异系数每升高1个百分点，产奶量下降0.124 kg/d，乳脂率升高0.012%。结果提示，TMR饲喂泌乳奶牛摄入养分因投料不准确、加工质量不稳定、搅拌不均匀、挑食等与配方养分产生差异。TMR加工质量稳定性影响到产奶量和乳成分，其中NEL、DCPSI、RENB的变异影响产奶量，长颗粒变异影响产奶量和乳脂率。
Subjects: Biology >> Zoology submitted time 2017-10-10 Cooperative journals: 《动物营养学报》
Abstract：限制性氨基酸研究是泌乳奶牛研究的一个热点之一，关于其影响乳蛋白合成途径而进行的一系列体内外研究表明：底物效应可能不是主要原因，更重要的是氨基酸及其构成作为信号因子对神经内分泌和细胞内信号通路的影响。本文从乳蛋白合成的影响因素入手，概括了氨基酸供给、激素分泌及二者相互作用对乳蛋白合成的调节，以期为阐明氨基酸供给影响乳蛋白合成的途径提供一定理论参考。
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