Analysis of the Intergranular Fracture Behavior of High Temperature Plastic Deformation of 1420 Al-Li Alloy     

LIU Xue-feng  WANG Ling-yun  HUANG Guang-jie 《保鲜与加工》2001,(3):127-131

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Artificial Neural Networks Models for Flow Stress during High Temperature Plastic Deformation of Al-Li Alloy     

LIU Xue-feng  WANG Ling-yun 《保鲜与加工》2001,(2):68-71

Using gained experimental data to develop the models of stable flow stresses at high temperature plastic deformation by statistical methods for alloy materials, precision of the models is poor and at the same time the processes of modeling are complicated with great workload. On the basis of the data obtained on Gleeble-1500 Thermal Simulator,the predicting models for the relation between stable flow stress during high temperature plastic deformation and deformation strain, strain rate and temperature for 1420 Al-Li alloy have been developed with BP Artificial Neural Network method. The results show that the model on basis of BPNN is practical and it reflects the real feature of the deforming process. It states that the difference between the real value and the output of the model is in order of 5 percent.  相似文献   

Calculation of the Tree-level Cross Section of the Process: γγ→tt-H in the Standard Model     

CHEN Gang  FANG Zhen-yun  HU BING-QUAN 《保鲜与加工》2005,(6):110-112

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Enterprise Culture and Enterprise Credit in Enterprise Core Competitive Force     

WANG Yong  FANG Zhi-da 《保鲜与加工》2004,(6):108-111

Based on the content of enterprise culture and enterprise credit, it is pointed out that the enterprise culture related to the enterprise core competitive force.In this paper, from the viewpoint of combining theory with practice, the intension, function and mutual relations between them are described and their significance in the market competition as well.The potential things,which the enterprise staffs are seeking for, from its inherent mind and the enterprise theory are the enterprise culture which becomes the enterprise core competitive force in its actual sense.The enterprise credit, as the enterprise culture in its ideological sphere, is an essential factor, which greatly affects the enterprise core competitive force.At last the authors provide some good suggestions on how to cultivate enterprise credit and to build enterprise culture.  相似文献   

Strictly Calculation to the Cross Section of Electron-antielectron Collision Under Chain Approximation     

JIANG Min  FANG Zhen-yun  SANG Wen-long  GAO Fei  LI Xiao-han 《保鲜与加工》2007,(1):109-113

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江淮稻区不同穗型粳稻品种主要农艺和品质特性的比较分析   总被引：15，自引：1，他引：15  

徐大勇  杜永  方兆伟  潘启民  杨建昌  朱庆森 《作物学报》2006,32(3):379-384

依据着粒密度，对江淮稻区大面积生产应用的和新近育成的36个粳稻品种(系)进行聚类分析。结果表明，供试品种可分成半密穗型(Ⅰ)、偏密穗型(Ⅱ)和密穗型（Ⅲ）三类。随着水稻品种由散穗型向半密穗型、偏密穗型和密穗型的演变，产量性状、品质性状、形态性状和部分生理、生化性状发生了明显的变化，产量、每穗总粒数和实粒数显著增加，而穗数/m²、千粒重和结实率呈下降趋势；株高增加，上部三张叶片变长、变宽，生物日产量增高；穗部一、二次枝梗数增多，着粒密度变大；抽穗期和成熟期叶片、茎秆的含氮量和叶片叶绿素含量增高；糙米率和整精米率下降、垩白粒率降低、胶稠度变硬、蛋白质含量呈上升的趋势。  相似文献   

节水灌溉条件下冬小麦耗水规律及其生态基础研究   总被引：16，自引：0，他引：16  

房全孝  陈雨海 《华北农学报》2003,18(3):18-22

从土壤水分、作物生长发育及气象条件三个方面分析了冬小麦农田耗水变化特点。结果表明：在土壤水分状况较好条件下冬小麦农田耗水强度呈双峰曲线变化,不同灌溉处理的耗水高峰出现时期及其峰值不同,而与灌水时期一致,同时灌溉能够明显降低冬小麦利用土壤底墒水能力。在拔节以前冬小麦农田耗水与大气蒸发力呈显著直线相关;拔节后与其干物质积累以及土壤水分含量呈显著正相关,拔节期是冬小麦需水的生理生态临界期。  相似文献   

光皮桦超干种子回湿方法研究   总被引：3，自引：0，他引：3  

方莹  周坚 《种子》2007,26(2):36-38

超干处理的光皮桦种子直接吸胀会引起种子活力下降,回湿处理可以减轻吸胀过程所造成的损伤.本试验以超干储藏1年的光皮桦种子,分别经回湿处理中湿度、温度和时间三因素组合的30种预先回湿处理.结果表明：湿度、温度和时间三因素是回湿处理的主要因素;30种处理中有6种处理的发芽率、发芽指数和高于对照,以30℃60%RH回湿4 d显著高于对照,效果最佳.  相似文献   

计算机技术如何应用于制种基地信息化管理     

王凤虎  方又平  彭从胜 《种子》2007,26(7):106-107

介绍了计算机技术如何应用于制种基地信息化管理。  相似文献   

喷油嘴流量系数对柴油机性能的影响     

房建峰  刘建新  常家东  宗永平  刘璐 《拖拉机与农用运输车》2006,33(6):59-60,65

研究了喷油嘴流量系数变化对单缸直喷柴油机性能的影响。结果表明,增大流量系数对ZH1105柴油机标定工况和低速大转矩工况的烟度和燃油消耗率有明显影响。通过对燃油喷雾的分析,揭示了流量系数影响柴油机性能的原因。  相似文献