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Effect of Pelleted Total Mixed Ration with Different Concentrate-roughage Ratios on Production Performance and Serum Biochemical Parameters of Fattening Hainan Black Goats

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Animal Husbandry and Feed Science 2019年第1期11卷 4-8页

作者： Liu Quanwei Wang Feng Wei Limin Tan Shuyi Sun Ruiping huang Lili Xing Manping Zheng xinli Institute of Animal Science and Veterinary Medicine Hainan Academy of Agricultural Sciences Haikou 571100 China Hainan Key Lab of Tropical Animal Reproduction Breeding and Epidemic Disease Research Haikou 571100 China

[Objective] This paper was to study effects of pelleted total mixed ration with different concentrate-roughage ratios on production performance and serum biochemical parameters of fattening Hainan black goats.[Method] Thirty-six fattening Hainan black goats with the same genetic background and similar initial weight of(14.08±0.13) kg were randomly assigned into three treatments. Goats were fed with Juncao + concentrate(control group), pelleted total mixed ration I(concentrate: roughage 50 ∶50, group Ⅰ) and Ⅱ(concentrate: roughage 45∶55, group Ⅱ), respectively. The test lasted 45 d.[Result] The final weight, daily gain and feed intake of rams in experimental group Ⅰ were significantly higher than those of control group and experimental group Ⅱ(P0.05).[Conclusion] When the concentrateroughage ratio of pelleted total mixed ration was 50∶50, the fattening effect of Hainan black goat was better, and the serum total protein and glucose levels were evidently improved.

关键词： Fattening Hainan black goat Pelleted total mixed ration Concentrate-roughage ratio Production performance Serum biochemical parameters

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图书情报硕士跨专业生源现状及成因分析

图书馆学研究 2019年第8期 9-13页

作者：尚新丽黄若尧郑州大学信息管理学院

简述图书情报硕士及其跨专业生源的概念,利用相关调查数据和第一手资料呈现我国图书情报硕士跨专业生源现状,从准入门槛低、学制短、图书情报专业的冷门性、专业相关性、学历镀金方面分析跨专业生源形成的原因。

关键词：图书情报硕士跨专业生源研究生教育

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长周期变转速下入口油温对高速轻载涡轮增压器转子振动特性影响

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机械工程学报 2020年第21期56卷 131-139页

作者：宾光富黄源钟新利杨峰毛征宇湖南科技大学机电工程学院湘潭411201 宁波丰沃涡轮增压系统有限公司宁波315336

高速轻载涡轮增压器转子系统的入口油温在长周期变转速运行条件下会产生动态变化,从而改变转子系统振动特性甚至导致非线性振动事故。以某型汽油机用高速轻载涡轮增压器转子为研究对象,分析浮环轴承内油膜最小厚度与偏心率随入口油温参... 详细信息

高速轻载涡轮增压器转子系统的入口油温在长周期变转速运行条件下会产生动态变化,从而改变转子系统振动特性甚至导致非线性振动事故。以某型汽油机用高速轻载涡轮增压器转子为研究对象,分析浮环轴承内油膜最小厚度与偏心率随入口油温参数的变化规律,构建涡轮增压器转子-浮环轴承系统动力学有限元模型,采用Newmark积分法分析转子系统的非线性瞬态响应,结合涡轮增压器升速实验,得到不同入口油温下转子系统三维振动瀑布图与Colormap频谱图,探究入口油温对转子系统振动响应特性的影响。结果表明:随着入口油温从50℃增至130℃时,内油膜最小厚度会减少,环速比与偏心率会增加,内油膜振荡幅值逐渐降低,但出现内油膜振荡与外油膜涡动的轴颈转速点会提前约30%,且外油膜涡动幅值会逐步增加。综合内外油膜涡动与振动幅值,入口油温约为90℃时转子振动情况较好。结论可为设计具有智能抗振性能的高速轻载涡轮增压器转子系统的运行参数提供理论参考。

关键词：入口油温动压油膜特性谐响应分析油膜涡动涡轮增压器转子

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微量Sr对Al-Mg-Si-Cu基合金的时效析出过程及动力学的影响

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机械强度 2006年第2期28卷 303-305页

作者：黄淑敏王新莉陈海军郑州经济管理干部学院机电系郑州450052

采用差热扫描量(differentialscanningcalorimeter,DSC)分析Sr含量对Al Mg Si Cu基合金时效β″和Q相激活能的影响。结果表明,加入Sr不改变β″和Q相的析出温度,但能影响它们的激活能。当Sr含量较低(0.033%,质量百分数)时,时效相的激活... 详细信息

采用差热扫描量(differentialscanningcalorimeter,DSC)分析Sr含量对Al Mg Si Cu基合金时效β″和Q相激活能的影响。结果表明,加入Sr不改变β″和Q相的析出温度,但能影响它们的激活能。当Sr含量较低(0.033%,质量百分数)时,时效相的激活能较低,比较容易析出,使合金得到更好强化;当Sr含量较高(0.093%)时,时效相的激活能较大,从而较难析出,对合金的强化作用较弱。

关键词： Al-Mg-Si-Cu基合金 Sr 时效激活能

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Effects of Dietary Concentrate to Forage Ratios on Production Performance and Serum Biochemical Indicators in Post-fattening Hainan Yellow Cattle

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Animal Husbandry and Feed Science 2020年第1期12卷 17-20,35页

作者： Wang Feng Wei Limin Zheng xinli Liu Hailong Sun Ruiping Chao Zhe huang Lili Fu Liang Liu Quanwei Institute of Animal Science and Veterinary Medicine Hainan Academy of SciencesHaikou571100 China Hainan Key Lab of Tropical Animal Reproduction Breeding and Epidemic Disease ResearchHaikou 571100China

[Objective]The paper was to investigate the effects of dietary concentrate to forage ratios on production performance and serum bio-chemical indicators of post-fattening Hainan Yellow Cattle.[Method]Sixteen Hainan Yellow Cattles with the same genetic backgrounds and similar initial weight of(242.22 ±0.71 kg) were randomly divided into four *** were fed with diets of different concentrate to forage ratios(20:80, group Ⅰ;30:70, Group Ⅱ;40:60, group Ⅲ;50:50, group Ⅳ).The trial lasted 62 d.[Result]The daily gain in experimental group Ⅳ was significantly higher than that in experimental group Ⅱ(P0.05).The feed intake in experimental group Ⅳ was also markedly higher than those in experimental groups Ⅰ and Ⅱ(P<0.05).Compared with the experimental group Ⅱ, the gross profit of experimental group Ⅳ was significantly promoted(P<0.05).The alanine aminotransferase and aspartate aminotransferase activities in experimental group Ⅱ were markedly higher than those in experimental groups Ⅰ, Ⅲ and Ⅳ.[Conclusion]When the dietary concentrate to forage ratios was 50∶50, the production performance of post-fattening Hainan Yellow Cattle was better.

关键词： Concentrate to forage ratios Hainan Yellow Cattle Growth performance Economic benefits Serum biochemical indicator

Effects of Crude Protein Level of Concentrate Supplement on Production Performance and Serum Biochemical Parameters in Post-fattening Hainan Yellow Cattle

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Animal Husbandry and Feed Science 2020年第1期12卷 31-35页

作者： Liu Quanwei Wei Limin Zheng xinli Sun Ruiping Chao Zhe Liu Hailong huang Lili Fu Liang Wang Feng Institute of Animal Science and Veterinary Medicine Hainan Academy of SciencesHaikou 571100China Hainan Key Lab of Tropical Animal Reproduction Breeding and Epidemic Disease ResearchHaikou 571100China

[Objective]The paper was to investigate the effects of crude protein level of concentrate supplement on production performance and serum biochemical parameters of post-fattening Hainan Yellow Cattle.[Method]Twelve Hainan Yellow Cattles with the same genetic backgrounds and similar initial weight of(168.13±0.55)kg were randomly divided into three *** were fed with concentrate supplement containing different levels of crude *** trial lasted 60 d.[Result]The daily gain of 17.56%crude protein group was significantly higher than those of 15.55%and 13.56%crude protein groups(P<0.05),and the gross profit of 17.56%crude protein group was markedly higher than that of 13.56%crude protein group(P<0.05),but the feed gain ratio of 17.56%crude protein group was significantly lower than that of 13.56%crude protein group(P<0.05).Compared with 15.55%and 13.56%crude protein groups,the serum total protein content markedly increased(P<0.05),but the urea nitrogen level significantly decreased(P<0.05).[Conclusion]When crude protein level of concentrate supplement was 17.56%,post-fattening Hainan Yellow Cattle could obtain better production performance.

关键词： Protein level Concentrate supplement Hainan Yellow Cattle Production performance Serum biochemical parameters

Meat Quality Characteristics of Hainan Black Goat and Its Hybrid with Nubian Black Goat

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Animal Husbandry and Feed Science 2017年第5期9卷 271-274页

作者： Zheng xinli Sun Ruiping Wei Limin Wang Feng Chao Zhe Liu Hailong Liu Quanwei huang Lili Xing Manping Institute of Animal Science and Veterinary Medicine Hainan Academy of Agricultural ScienceHaikou 571100China Hainan Key Lab of Tropical Animal Reproduction&Breeding and Epidemic Disease Research Haikou 571100China

[Objective] The paper was to understand the meat quality characteristics of Hainan black goat and its hybrid with Nubian black goat. [Method]Four 6-month-old Hainan black goats and Hainan black goat × Nubian black goat F1 were slaughtered respectively,and the contents of crude protein,total fat,moisture,amino acids,mineral elements( Se,Zn and Mn) and fatty acid were determined. [Result]There was no significant difference in total fat,crude fat and moisture content in muscle of Hainan black goat × Nubian black goat F1 and Hainan black goat( P > 0. 05). The Fe content in the muscle of Hainan black goat × Nubian black goat F1 was significantly higher than that in Hainan black goat( P 0. 05). The C17∶ 0 methyl heptadecanoate content in the muscle of Hainan black goat × Nubian black goat F1 was extremely lower than that in Hainan black goat( P 0. 05). [Conclusion]The meat quality characteristics of Hainan black goat × Nubian black goat F1 had little difference with its female parent,and the goal of breeding had been basically achieved.

关键词： Hainan black goat Nubian black goat Hybrid Meat quality

Slaughtering Performance and Meat Quality of Hainan Black Goat and Its Hybrid Offsprings with Nubian Black Goat

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Animal Husbandry and Feed Science 2019年第2期11卷 49-52页

作者： Wei Limin Sun Ruiping Liu Yan Liu Ruina Liu Quanwei Zheng xinli Wang Feng huang Lili Xing Manping Institute of Animal Science and Veterinary Medicine Hainan Academy of Agricultural Sciences Haikou 571100 China Henan Vocational College of Agriculture Zhengzhou 451450 China Animal Health Supervision Institute of Yanzhou District Jining 272100 China Hainan Key Lab of Tropical Animal Reproduction & Breeding and Epidemic Disease Research Haikou 571100 China

In order to compare the slaughter performance and meat quality of Hainan black goats and hybrid offsprings of Nubian Black Goat and Hainan Black Goat, six 7-month-old Hainan black goats and six hybrid offsprings were selected to determine slaughter performance and muscle quality. The results showed that hybridization of Nubian black goat and Hainan black goat significantly improved the production performance and slaughter performance of hybrid offsprings (P>0.05). The meat quality of F1 hybrid black goat had no significant difference with that of Hainan black goat except for the hardness and elasticity (P<0.05). Therefore, the crossbred progenies of Nubian black goat and Hainan black goat have advantages in meat yield and meat performance, and the main meat quality indexes are not significantly different, which meets the market requirements for high-yield and high-quality hybrid combinations, and can be used for cross promotion.

关键词： Hainan Black Goats Nubian Black Goats Hybrid offspring Slaughter performance Meat quality

高压调温水余热有机朗肯循环发电系统研究及工程应用

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热力发电 2022年第2期51卷 27-34页

作者：周托黄增辉丁新利清华大学能源与动力工程系热科学与动力工程教育部重点实验室北京100084 中国矿业大学(北京)化学与环境工程学院北京100083 威海热电集团有限公司山东威海264200

以流量为130 t/h、温度为130℃的尿素装置高压调温水(高调水)为研究对象,基于有机朗肯循环(organic Rankine cycle,ORC)系统建立模型,采用R245fa、R600a和R236ea作为循环工质,分别在蒸发温度95~115℃,冷凝温度26~34℃,过热度0~20℃条件... 详细信息

以流量为130 t/h、温度为130℃的尿素装置高压调温水(高调水)为研究对象,基于有机朗肯循环(organic Rankine cycle,ORC)系统建立模型,采用R245fa、R600a和R236ea作为循环工质,分别在蒸发温度95~115℃,冷凝温度26~34℃,过热度0~20℃条件下对其系统性能进行模拟研究。结果表明:在相同的模拟条件下,R245fa的循环热效率最高,净输出功最大;R600a的净输出功最小,但是比净功最大;R236ea的循环热效率最低,比净功最小。依据模型研究结果,综合考虑了热力学性能、安全性及环保性,选择以R245fa为循环工质,设计并建设了高调水余热ORC发电机组。实际运行结果显示:机组的循环热效率和净输出功随着环境温度的影响较大,在冬季环境温度为5.4℃时,机组循环热效率达到10.78%,净输出功为221.40 kW;而夏季环境温度为30.3℃时,机组的循环热效率为9.06%,净输出功仅有190.5 kW。

关键词：有机朗肯循环高压调温水余热工质工程应用

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