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Study on round rice straw bale wrapping silage technology and facilities

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International Journal of Agricultural and Biological Engineering 2018年第4期11卷 88-95页

作者： liqiao li Defu Wang Xing Yang College of Engineering Northeast Agricultural UniversityHarbin 150030China Key Laboratory of Swine Facilities Engineering Ministry of AgricultureHarbin 150030China

Specific to problems of the existing round bale wrapping machine in China,such as small application scope and failing to satisfy the wrapping demands of round bales of different specifications,a tumbler-type round bale wrapping machine based on wrapping silage with stretch film was *** theoretical analysis and preliminary experiments of the corresponding wrapping process,revolving speed of tumbler,speed ratio between tumbler and carrier rollers,and pre-load force of stretch film were determined as experimental factors,while wrapping time and consumption of stretch film per unit mass of round bale were determined as evaluation ***,quadratic regression orthogonal rotational combination experimental design was adopted to carry out the wrapping *** regression models were set up,and influencing rules of experimental factors on evaluation indexes were also *** optimal parameter combination scheme was revolving speed of tumbler of 31-32 r/min,speed ratio between tumbler and carrier rollers of 2.6,and pre-load force of stretch film of 20-22 *** such a circumstance,the corresponding wrapping time required was 37.7-38.9 s and consumption of stretch film per unit mass of round bale was 3.21-3.46 kg/*** predicted values and the measured values of evaluation indexes basically coincided with each other and the relative error fell below 5%,which indicated that both the optimized regression models acquired through the wrapping experiment and the relevant parameter optimization results were *** guarantee the quality of rice straw silage,the round bale should be wrapped by no less than five layers of stretch films through the utilization of the tumbler-type round bale wrapping *** study results could be used as references for research and development of the round bale wrapping machine.

关键词： round bale silage wrapping machine tumbler-type analysis experiment

Design and parameter optimization of spiral-dragon type straw chopping test rig

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International Journal of Agricultural and Biological Engineering 2020年第1期13卷 47-56页

作者： Pengbo Ma liqiao li Baoqin Wen Yunheng Xue Za Kan Jingbin li College of Mechanical Electrical Engineering Shihezi UniversityShihezi 832000China Key Laboratory of Northwest Agricultural equipment Ministry of Agriculture and Rural AffairsShihezi 832000China

In order to address the problems of large chop length,high energy consumption and poor chopping effect that were associated with a horizontal total mixed rations(TMR)mixer,a straw chopping device was designed;further,its structure and working principle were *** this study,wheat straw was chosen as the test *** number of processing times,number of fixed blades,cutting speed,number of tooth plates and the inclined angle of the box were considered as the test *** standard straw length rate and average power were used as evaluation indices for conducting the orthogonal rotation combination experiment with five factors and five levels of quadratic *** experimental results denoted that the order of influencing factors on the standard straw length rate can be given as follows:the number of processing times,number of fixed blades,cutting speed,number of tooth plates and inclined angle of the *** order of the influence of each factor on the average power can be given as follows:the cutting speed,number of fixed blades and number of tooth ***,the optimum structural and working parameters of the device can be determined as follows:linear cutting speed of 17-20 m/min,box inclined angle of 70°-80°,20-23 fixed blades,5-6 processing times and 4-7 tooth *** such a circumstance,the standard straw length rate reached up to 70.5%-77.4%and the average power was low at 5.8-7 *** results can be used as reference for designing a chopping device for a TMR mixer.

关键词： total mixed rations straw chopping device parameter optimization

The interannual periodicity of precipitation and its links to the large-scale circulations over the Third Pole

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Journal of Geographical Sciences 2024年第8期34卷 1457-1471页

作者： liANG liqiao liU Qiang li Jiuyi State Key Laboratory of Tibetan Plateau Earth System Environment and Resources(TPESER)Institute of Tibetan Plateau ResearchCASBeijing 100101China State Key Laboratory of Water Environment Simulation School of EnvironmentBeijing Normal UniversityBeijing 100875China Key Laboratory for Water and Sediment Sciences Ministry of EducationSchool of EnvironmentBeijing Normal UniversityBeijing 100875China Key Laboratory of Water Cycle and Related Land Surface Processes Institute of Geographic Sciences and Natural Resources ResearchCASBeijing 100101China

To understand the spatio-temporal variability of precipitation(P)in the Third Pole region(centered on the Tibetan Plateau-TP),it is necessary to quantify the interannual periodicity of P and its relationship with large-scale *** this study,Morlet wavelet transform was used to detect significant(plimate domains in the Third Pole,and to reveal the major large-scale circulations that triggered the variability of periodic P,in addition to bringing large amounts of water *** wavelet transform results were as follows.(1)Significant quasiperiodicity varied from 2 to 11 *** high-frequency variability mode(2 to 6 years quasi-periods)was universal,and the low-frequency variability mode(7 to 11 years quasi-periods)was rare,occurring mainly in the westerlies and Indian monsoon domains.(2)The majority of periods were base periods(53%),followed by two-base *** all stations in the Third Pole(95%)showed one or two periods.(3)Periodicity was widely detected in the majority of years(84%).(4)The power spectra of P in the four domains were dominated by statistically significant high-frequency oscillations(ie.,with short periodicity).(5)Large-scale circulations directly and indirectly influenced the periodic P variability in the different *** mode of P variability in the different domains was influenced by interactions between large-scale circulation features and not only by the dominant circulation and its control of water vapour *** results of this study will contribute to better understanding of the causal mechanisms associated with P variability,which is important for hydrological science and waterresourcemanagement.

关键词： precipitation interannual periodicity Morlet wavelet large-scale circulations Third Pole

回转式日粮混合机混合机理分析与性能试验优化

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农业机械学报 2017年第8期48卷 123-132页

作者：李利桥王德福李超东北农业大学工程学院哈尔滨150030

针对我国日粮混合机机理研究及自主设计不足的问题,结合我国畜牧业发展的实际需要,设计了一种在筒体内壁安装抄板的回转式日粮混合机,实现日粮的均匀混合。为揭示其混合机理,利用回转式日粮混合试验装置,借助高速摄像技术对其混合过程... 详细信息

针对我国日粮混合机机理研究及自主设计不足的问题,结合我国畜牧业发展的实际需要,设计了一种在筒体内壁安装抄板的回转式日粮混合机,实现日粮的均匀混合。为揭示其混合机理,利用回转式日粮混合试验装置,借助高速摄像技术对其混合过程进行了观察和分析,结果可知:按筒体内物料颗粒群运动特征可将物料分布区域划分为提料区、抛落区、回料区,其中抛落区是主混合区,其物料以剪切混合为主、以扩散与对流混合为辅,且各个区域的位置、大小、形状受结构和运行参数的影响很大;同时,以筒体转速、物料装载率、混合时间、抄板安装角和抄板高度为试验因素,以变异系数、净功耗为评价指标,采用五因素五水平(1/2部分实施)正交旋转组合试验方法进行了性能优化试验,并确定其最佳参数组合为:筒体转速23.5 r/min、物料装载率65%、混合时间4 min、抄板安装角11°、抄板高度109 mm,此时变异系数、净功耗分别为2.09%、33.734 kJ,比优化前分别降低了64.4%和15.1%。

关键词：日粮混合机回转式抄板混合机理试验

奥马珠单抗治疗对抗组胺药反应不佳的慢性荨麻疹患者单中心回顾性研究

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中华皮肤科杂志 2023年第6期56卷 504-511页

作者：李丽俏彭聪陈翔李捷中南大学湘雅医院皮肤科皮肤肿瘤与银屑病重点实验室国家老年疾病临床医学研究中心(湘雅医院) 长沙410008

目的了解奥马珠单抗治疗H1抗组胺药控制不佳的慢性荨麻疹(CU)患者的疗效及安全性。方法纳入中南大学湘雅医院皮肤科2020年6月至2021年6月使用H1抗组胺药疗效不佳并接受奥马珠单抗治疗的CU患者,通过7 d荨麻疹活动度评分(UAS7)、荨麻疹控... 详细信息

目的了解奥马珠单抗治疗H1抗组胺药控制不佳的慢性荨麻疹(CU)患者的疗效及安全性。方法纳入中南大学湘雅医院皮肤科2020年6月至2021年6月使用H1抗组胺药疗效不佳并接受奥马珠单抗治疗的CU患者,通过7 d荨麻疹活动度评分(UAS7)、荨麻疹控制评分(UCT)评估治疗后4、12、24周的疗效。采用t检验、卡方检验、Pearson相关分析等分析临床特征与疗效的关系。结果共121例符合入排标准且数据资料相对完整的CU患者纳入本研究,男54例(44.63%)、女67例(55.37%),年龄13~70(39.88±14.36)岁;88例为慢性自发性荨麻疹(72.73%),10例(8.26%)为慢性诱导性荨麻疹,23例为慢性自发性荨麻疹合并慢性诱导性荨麻疹(19.01%)。奥马珠单抗治疗4周时有效率为50.86%(59/116),完全应答率为25.86%(30/116);12周时有效率为78.26%(54/69),完全应答率为34.78%(24/69);24周时有效率为64.71%(22/34),完全应答率为23.53%(8/34)。治疗4周时,基线血清总IgE<40 IU/ml的CU患者(26例)治疗有效率(30.77%)显著低于血清总IgE≥40 IU/ml者(61例)(65.57%,χ^(2)=8.93,P=0.004)。相关性分析显示,治疗年龄、发病年龄、合并过敏性疾病、伴随症状、基线红细胞沉降率、基线C反应蛋白水平均与UCT评分显著相关(均P<0.05),而病程、临床类型、血清总IgE水平、外周血细胞计数、皮肤病生活质量指数、UAS7评分等与UCT评分无显著相关性。121例CU患者中,8例(6.61%)报道了轻中度不良反应。结论奥马珠单抗可有效改善H1抗组胺药控制不佳CU患者的临床症状和体征,且耐受性良好;对于无合并过敏性鼻炎等过敏性共病、无血管性水肿等伴随症状、红细胞沉降率及C反应蛋白水平相对较低的患者在奥马珠单抗治疗中可能获益更多。

关键词：荨麻疹生物制剂治疗结果慢性自发性荨麻疹奥马珠单抗

Toxic effects of Cd2+ on the intestinal ultrastructure of Cypridopsis vidua(Crustacea:Ostracoda)

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Toxic effects of Cd2+ on the intestinal ultrastructure of Cy...

INFLUENCE OF MANAGERIAL BEHAVIORS ON STRATEGIC DECISION-MAKING:MULTI-AGENT PERSPECTIVE

中国甲壳动物学会第十一届年会暨学术研讨会

作者： Shimei Chen~*,Na Yu,Erchao li,liqiao Chen School of life Science,East China Normal University,Shanghai 200062,China

The toxic effects of Cd on Cypridopsis vidua(O.F.M(u|¨)ller,1776) and its intestinal ultrastructure were examined using a static renewal *** LC50 values for cadmium in *** were 5.00,2.01,0.46 and 0.14 mg/L at 24,48,72 and 96 h exposure,respectively,suggesting that the LC decreased with increasing exposure time,and the safe concentration of Cd for long-term *** survival was less than

关键词： Ostracoda Cd acute toxicity intestinal ultrastructure

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INFLUENCE OF MANAGERIAL BEHAVIORS ON STRATEGIC DECISION-MAKI...

2005年中国机械工程学会年会

作者： li liqiao, CHEN Zhigao, WU Bing (East China University of Science and Technology, Shanghai, 200237, China Shanghai Jiaotong University, Shanghai, 200030, China)

＜正＞This paper discusses how to optimize the influence of managerial behaviors on strategic decision from a multi-agent perspective. By using multiple intelligent agent techniques, managerial behaviors in the strategic decision-making are supposed to be simulated as intelligent agent and a managerial behaviors influence model is structured based on multi-agent. Furthermore, research on the relation between managerial behaviors and strategic decision-making is conducted by analyzing the interaction among multi intelligent agent. It is suggested that managerial behaviors play a crucial role in strategic decision-making and meanwhile both manager’s cognition of strategic decision and its results will verify manager’s decision and behaviors, which will affect manager’s behaviors in the future the other way round. It is proposed that multi-agent techniques can bring about significant effect in managerial behavior simulation and strategic decision-making optimization.

关键词： strategic decision managerial behavior multi-agent

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叶板式饲料混合机混合机理分析与参数优化

农业机械学报 2017年第12期48卷 98-104页

作者：王德福李超李利桥李百秋王国富林熠东北农业大学工程学院哈尔滨150030 农业部生猪养殖设施工程重点实验室哈尔滨150030

针对我国饲料混合机的发展需要及其混合机理的研究现状,对叶板式饲料混合机进行了机理分析与参数优化。通过理论分析和高速摄像研究,按物料运动特征将混合室内物料分布区域划分为蠕动区、滑动区、抛落区,其中蠕动区以剪切混合为主,滑动... 详细信息

针对我国饲料混合机的发展需要及其混合机理的研究现状,对叶板式饲料混合机进行了机理分析与参数优化。通过理论分析和高速摄像研究,按物料运动特征将混合室内物料分布区域划分为蠕动区、滑动区、抛落区,其中蠕动区以剪切混合为主,滑动区以较强的剪切混合为主,抛落区以较强的剪切混合与扩散混合为主、伴随较弱的对流混合,且各个区域的位置、大小、形状受结构和运行参数的影响很大。在物料充满系数为65%的条件下(通过预试验确定),以影响混合过程的主要因素——叶板宽度、转子转速、混合时间作为试验因素,以变异系数作为评价指标,采用三因素五水平正交旋转组合试验方法进行试验。结果表明:各因素对变异系数的影响由大到小依次为转子转速、混合时间、叶板宽度;当试验参数组合为叶板宽度138 mm、混合时间4.7 min、转子转速32.5 r/min时,变异系数为3.11%。

关键词：饲料混合机叶板式混合机理参数优化

工艺参数对65Mn基熔覆Ni60a/SiC涂层的微观组织与耐磨性能影响

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机械工程学报 2022年第16期58卷 197-205页

作者：史亚盟李景彬张杰温宝琴李利桥王贤斐石河子大学机械电气工程学院石河子832099 现代农业机械兵团重点实验室石河子832099 新疆农业科学院农业机械化研究所乌鲁木齐830091

为提高饲草揉切机中揉切刀片的耐磨性,采用激光熔覆技术在65Mn钢表面制备Ni60a/SiC复合粉末熔覆层。分析镀层的显微硬度、物相组成和摩擦磨损性能,以得到最佳激光熔覆工艺参数组合。结果表明,影响熔覆层硬度的工艺参数主次顺序依次是光... 详细信息

为提高饲草揉切机中揉切刀片的耐磨性,采用激光熔覆技术在65Mn钢表面制备Ni60a/SiC复合粉末熔覆层。分析镀层的显微硬度、物相组成和摩擦磨损性能,以得到最佳激光熔覆工艺参数组合。结果表明,影响熔覆层硬度的工艺参数主次顺序依次是光斑直径,激光功率和扫描速度,熔覆层有新物相的析出,主要包括NiCr O_(3)与Cr_(3)Ni_(2)SiC等硬质相。最佳激光熔覆参数组合为激光功率2000 W,扫描速度400 mm/min和光斑直径3 mm,在此参数下的熔覆层显微硬度为870 HV_(0.1),并且熔覆层与基体呈现良好的冶金结合,在相同的磨损试验环境下,此熔覆层的磨损形式主要是磨粒磨损,磨损量为0.003 g,相比65Mn基体磨损参数,摩擦因数降低29%,磨痕深度降低83%,复合涂层的耐磨性明显增加,本研究在提高刀片的使用寿命方面具有较好的参考价值。

关键词：刀片激光熔覆熔覆参数耐磨性