Knowledge-based Intelligent Decision-making System for the Safety of Rockets     

LI Wei  HUANG Xi-yue  WEI Hong-bo  QIAO Yu  LI Ya 《保鲜与加工》2006,(1):77-80

With the progress of science and technology, the astronautics has obtained great development and researched in many countries, the problem on rocket safety control is important during the rocket launching proceeding, and is also the focus of every space country. At first, the importance of rocket safety control is introduced and the characteristics of the existing system for the safety of rockets are analyzed. After indicating its disadvantages, the design idea, system framework and method for realization of the knowledge-based intelligent decision-making system are proposed to improve certainty and authenticity of safety decision, containing correspond knowledge and adopting the technology of intelligent decision and reasoning on AI.  相似文献   

The analysis of China wind power industry   总被引：6，自引：0，他引：6  

WANG Changlu  WANG Weigong  ZHANG Liyong  QIAO Xuetao 《保鲜与加工》2015,(1):148-154

The development course of China wind power industry is reviewed by six stages. National policies on wind power industry are elaborated from the aspects of laws & regulations, planning, finance & taxation and electrovalence policy. And these policies have played an important supporting and regulating role in the development of wind power industry. The development status of China wind power industry is analyzed based on wind turbine installed capacity, wind power output and their growth rate. It is explained that national wind turbine manufacturers have kept developing and become strong by the data of new global installed capacity share of mainland wind turbine manufacturers in 2013 and the new global market share of 8 domestic enterprises among the world top 15 wind turbine manufacturers. But there are still 5 key problems which influence the development of national wind turbine need to be solved, including lack of top-level design, abandon and restriction wind power seriously, lack of R&D abilities, some of the key parts relying on imports and wind turbine facing a quality guarantee dilemma. Taking Sinovel Wind Group Co. Ltd. and Xinjiang Goldwind Sci & Tech Co. Ltd., the two leading companies as an example, their performance is analyzed and it’s pointed out that the wind industry must keep vigilant after the overspeed development. The enterprises should try to avoid neglecting cultivating their inner core competitive ability, including technology advancements and products reliability. Occupying the market with low price competition and expanding blindly is also not desirable. At last, the development prospects of our country’s wind power industry are analyzed and three proposals are put forward.  相似文献   

鄂尔多斯高原北部沙区主要植被类型下土壤要素的空间分析   总被引：1，自引：0，他引：1  

WANG Zhong  QIAO Hai-yan Eology Item Office of Yi-li Resource Group  DuguitaLa  China 《华北农学报》2006,(Z3)

鄂尔多斯北部沙区存在着极为显著的风沙地貌,在此格局基础之上,特别是在植被与土壤的相互响应过程中,二者的相互关系逐渐密切,这种反馈作用使得该区域的植被与土壤要素形成的空间分布格局具有一定的耦合性。研究这种关系可以为该地区保护植被和合理利用土地资源提供科学依据。  相似文献   

11种兰属植物DNA的提取及RAPD-PCR实验体系的建立与优化   总被引：3，自引：1，他引：3  

王国鼎  文晓鹏  季祥彪  乔光  胡鹏 《种子》2007,26(3):24-27

采用改进的CTAB-DNA提取方法，从11种兰属植物的嫩叶中提取总DNA。所得的DNA样品的A260／A280值在1．7～1．9之间，琼脂糖凝胶上主带清晰，较少降解，样品纯度高，DNA量大。另外，对影响RAPD-PCR的Mg^2＋、dNTPs、Taq酶、引物浓度等因素进行了优化。确定优化的反应体系为：75ng模板DNA，1×Buffer，2．5mmol／LMg^2＋，0．15mmol／LdNTPs，0．75UTaq酶，引物浓度0．4μmol／L，反应总体积为25山。该体系在20个供试兰属实验材料中获得较好的扩增结果。  相似文献   

小型梳穗收获机收获损失的分析与试验   总被引：2，自引：0，他引：2  

乔西铭 《农机化研究》2007,(8):103-105

小型梳穗收获机运用梳穗收获原理,一次完成田间站秆谷物梳脱、粒穗分离、复脱、清选和装袋等工序.梳穗收获中,谷物损失率是衡量小型梳穗收获机性能的重要指标.为此,对影响其损失率大小的因素进行了分析,进行了一系列室内外单因子性能试验和正交试验,找出了最佳的结构参数.  相似文献   

梳穗收获飞溅损失的分析和试验   总被引：1，自引：0，他引：1  

乔西铭  郑伟光  朱中仕  张先锋 《中国农机化》2005,(3):73-75

梳穗收获时梳穗齿和穗头的梳脱位置对梳穗收获机的性能影响较大．本文对梳穗收获的飞溅损失进行了初步分析与探讨．确定降低飞溅损失的最佳梳脱区和有效梳脱区并进行了试验，找出了影响飞溅损失的主要参数。  相似文献   

我国农业可持续发展的理论与实现措施   总被引：2，自引：0，他引：2  

乔艳芳 《农机化研究》2005,(3):34-35

目前,现代农业的发展面临着一系列的困难问题:发达国家主要是环境污染、农业投入增加、成本过高;发展中国家主要是人口膨胀、资源破坏和过渡消耗、食物安全问题严重。为此,从持续农业的产生背景出发,提出了持续农业的基本内容和主要目标。针对我国国情,从几个方面论述了我国实现可持续农业需要的政策措施。  相似文献   

小型摘穗收获机的研制     

乔西铭  朱中仕  赵守江  陈伯权 《农机化研究》2004,(3):113-114,117

运用摘穗收获原理，研制了米麦套作地区小麦收获用的小型摘穗收获机，可一次完成田间站秆摘穗脱粒、粒穗分离、复脱、清选和装袋等工序。小型摘穗收获机与传统收获机相比。具有结构简单、工作可靠等特点。  相似文献   

美国食用菌产业发展报告   总被引：1，自引：0，他引：1  

于洁  张博然  李逸波  乔立娟 《中国食用菌》2021,(1):118-123

通过利用美国农业部、农业统计局及相关行业网站发布的产业数据、新闻报道和研究报告,对美国食用菌产业的变化趋势及其原因进行梳理。结果发现,随着生产效率的提高美国食用菌产量和产值逐年提高,但通过不断的兼并收购,食用菌生产者的数量明显下降。在政府组织和行业自发的行业组织和协调下,美国食用菌行业竞争有序,食用菌价格稳定,食用菌产业创造了良好的经济、社会和生态效益。美国是世界食用菌生产强国,研究美国食用菌生产和消费变化趋势,了解食用菌产业组织的活动和经验,有助于引导我国食用菌产业的健康发展。  相似文献   

Mining Applicable Elite Alleles of Growth Duration,Plant Height and Panicle Number per Plant by Conditional QTL Mapping in Japonica Rice   总被引：1，自引：0，他引：1  

JIANG Jian-hua  ZHAO Qi-bing  LIU Qiang-ming  CHEN Lan  CHEN Fu-long  QIAO Bao-jian  HONG De-lin 《水稻科学》2011,18(3):196-203

Unconditional and conditional QTL mapping were conducted for growth duration (GD), plant height (PH) and effective panicle number per plant (PN) using a recombinant inbred line (RIL) population derived from a cross between two japonica rice varieties Xiushui 79 and C Bao. The RIL population consisted of 254 lines was planted in two environments, Nanjing and Sihong, Jiangsu Province, China. Results showed that additive effects were major in all of QTLs for GD, PH and PN detected by the two methods, and the e...  相似文献