南方冬种马铃薯杀秧机的设计     

王毅  黄雪锋  熊平原 《农业科技与装备》2015,(1):20-22

根据南方冬种马铃薯机械化收获的农艺要求,仿照马铃薯播种机所形成的垄形,设计一种适合于南方冬种马铃薯的杀秧除草设备。利用Solid Work设计传动系统、刀辊和刀具,并对刀具进行有限元受力分析。受力仿真分析及刀辊动平衡试验结果表明,马铃薯杀秧机能够满足设计的要求。  相似文献   

重庆三峡库区肉牛结核病布鲁菌病的调查     

李前勇  张德志  曹立亭  熊仲良  吴柏青  左福元 《中国兽医杂志》2016,(4):3-5

采用牛提纯结核菌素皮内变态反应结合γ-干扰素试验、虎红平板凝集试验、试管凝结试验及ELISA法分别对重庆三峡库区肉牛结核病、布鲁菌病进行了抽样检测。结果显示,该区域肉牛结核病阳性检出率为1.2%,布鲁菌病阳性检出率为1.04%。其中,库区东北部区县肉牛结核病、布鲁菌病的阳性检出率均为最高,分别为1.83%、1.14%;3种肉牛养殖规模条件下,个体散养农户牛群结核病、布鲁菌病的阳性检出率均为最高,分别为2.21%、2.94%;所调查的3个年龄段牛群中,19月龄以上牛群结核病、布鲁菌病的阳性检出率最高,分别为2.91%、4.85%。  相似文献   

高寒地区蛹虫草大米培养基的优化     

孙慧娟  谢荣  熊卫萍  张君丽  白玛旦增  洛桑 《北方园艺》2016,(2):143-145

以引进西藏的6株蛹虫草为试材,对比研究了其菌丝生长速率、出草产出及长势,筛选优良的蛹虫草菌株,并通过正交实验筛选对蛹虫草大米培养基营养成分的最优水平组合。结果表明:蛹虫草"TAAAS1"的菌丝生长速率虽不是最快的,但出草整齐均匀,出草产出高于其它菌株,表明"TAAAS1"菌株是适宜在高寒地区栽培生产的好品种;蛹虫草大米培养基的最优水平组合为蛹粉4g/L,葡萄糖20g/L,硫酸镁2g/L,磷酸二氢钾1.5g/L。  相似文献   

"已实现"波动率理论研究与评价     

熊正德  张洁 《湖南农业大学学报(自然科学版)》2007,(4)

"已实现"波动率是一种全新的金融波动率测量方法。"已实现"波动率在理论上没有测量误差的无偏估计量,在实证建模方面比其他模型更易于估计参数,同时最优频率的选取对于"已实现"波动率的测量精确度是很重要的。  相似文献   

继电保护压板的智能校核方法     

高元生  陈强  熊小伏  周岐杰  郑昌圣 《保鲜与加工》2015,(6):91-98

继电保护压板位置一般与一次设备运行方式相关,在一次设备运行方式改变时,有时需要改变压板的位置进行匹配。实际运行操作中因压板位置投退错误,已导致多起事故发生。为了避免保护压板出现漏投、误投现象,从搜索一次元件状态、运行方式的角度出发,在采集压板位置信息基础上,提出了一种压板位置与一次元件运行方式匹配状态的智能校核方法。根据一次元件的运行状态及相应的压板整定规则,生成一次元件压板位置关联规则库,利用变电站开关状态信息在变电站倒闸操作后自动识别一次元件状态,与一次元件压板规则库进行比较,当出现不一致时给出报警提示信号,实现了压板位置的智能校核。通过对实际工程中变压器运行转检修操作任务的分析,验证了所提方法的有效性。  相似文献   

Maximizing Deviation Method on Comprehensive Evaluation of Commercial Bank''s Internal Control     

CHEN Zi-li  LI Zun-wei 《保鲜与加工》2005,(10):151-154

This paper analyzes the questions that are likely to exist in comprehensive evaluation of commercial bank's internal control.On the basis of the analysis,the valuation indexes are divided into two levels.And maximizing deviation method,is introduced to get a evaluation method that can evaluate commercial bank's internal control more impersonally and more impartially.  相似文献   

A Theoretical Analysis of Underpricing in IPOs Based on the Irrational Behavior of Investors     

XIONG Hu  MENG Weidong  ZHOU Xiao-hua 《保鲜与加工》2007,(10):138-143

Employing the standpoint of irrational investors in the behavior finance, the authors study the relation on the irrational behavior of medium and small Investors and underpricing of IPO in our country. The paper premises that a revenue-maximizing issuer will be regarded as the target function, and the rational institutional investors can be delegated the task of holding the stocks in the after-market for resale to the irrational medium and small investors--thereby extracting surplus from them, finally the issuer can maximize their expected revenue. We model the process mentioned above and find that the high underpricing of IPO in our country has the direct relation with numerous the irrational medium and small investors existing in our country who cause the underpricing.  相似文献   

Design and Application of a New Elliptical Crystal Spectrometer     

GAO Jie  ZHONG Xian-xin  XIAO Sha-li  XIONG Xian-caieMinistry of Education  Chongqing University  Chongqing  Chin 《保鲜与加工》2004,(5):5-8

  相似文献   

An Analysis of Principal-Agent of Game under the Asymmetric Information in Venture Capital     

SU Su  XIONG Feng hu  YIN Ping 《保鲜与加工》2002,(12):127-129133

The relationship of investors and venture capitalists is an important part in venture capital. Based on asymmetric information, this paper analyzes the principal agent relationship between investors and venture capitalists with game theory. And this paper mainly discusses the choosing, controlling and incentive problem. It suggests that only the capable and self confident venture capitalists could accept the terms of the limited partnership. It also indicates that recompense mechanism which holds the interest of investors and that of venture capitalists tightly is the center of the limited partnership. Rate of yield is the key of recompense mechanism, it not only reflects the incentive on venture capitalists, also reflects the share of risk between investors and venture capitalists. At last, the market credit play an important role in venture capital.  相似文献   

Data Loading Technology of Data Warehouse     

XIONG Zhong yang  ZHANG Yu fang  WU Zhong fu 《保鲜与加工》2002,(2):106-108

Data warehouse is not the simply data accumulation of operational database. For exerting the function of data warehouse, the construction of data warehouse should be convenient for the data mining and business intelligent work, supply information access, analyze, and share for decision maker. The key to constructing a successful data warehouse is to fully understand the demand of end users from beginning to the end, search and storage data surround users motive closely. This paper first analyzes the data warehouse characteristic and the sort of data component, emphasizes in effective data loading methods and strategies from operational database to data warehouse, gives five sorts data loading methods.  相似文献