检索结果-南通市图书馆

The Impact of Varied Fertilizers on the Yield and Quality of Panicum miliaceum under Low Nitrogen Conditions

Phyton-International Journal of Experimental Botany 2024年第10期93卷 2629-2644页

作者： Mengyao Wang Jiao Mao Yuanmeng Xu Shu Wang Yuhan liu Jiangling Ren sichen liu Zhijun Qiao Xiaoning Cao Center for Agricultural Genetic Resources Research Shanxi Agricultural UniversityTaiyuan030031China College of Agriculture Shanxi Agricultural UniversityJinzhong030801China Key Laboratory of Crop Genetic Resources and Germplasm Development in Loess Plateau Ministry of Agriculture and Rural AffairsTaiyuan030031China

To clarify the response characteristics of broomcorn millet yield and quality to various fertilizers under low nitrogen conditions,the present study investigated the effects of different fertilization treatments,including no fertilization(HCK,CCK),urea(HF1,CF1),phosphate fertilizer(HF2,CF2),compound fertilizer(HF3,CF3),and organic fertilizer(HF4,CF4),on the agronomic traits,quality,and starch pasting properties of proso *** experimental materials,non-waxy proso millet(Hequ red proso millet,denoted as HQH)and waxy proso millet(Chishu 1,denoted as CS1)were *** results showed that under low nitrogen conditions,urea treatment(HF1)significantly increased plant height and yield,and phosphate fertilizer treatment(HF2)significantly increased thousand-grain weight(TW).For waxy proso millet Chishu NO.1(CS1),urea treatment(CF1)significantly increased yield,phosphate fertilizer treatment(CF2)significantly influenced the height of the plants,and compound fertilizer treatment(CF3)significantly increased thousand-grain *** terms of quality,phosphate fertilizer treatment(CF2)and organic fertilizer treatment(CF4)resulted in a substantial augmentation of both the total starch content and amylose content of waxy proso millet Chishu NO.1(CS1),respectively,and organic fertilizer treatment(HF4,CF4)resulted in a notable enhancement of the protein content of proso *** fertilizer treatment(HF4)increased peak viscosity(PV),hot viscosity(HV),setback viscosity(SV),final viscosity(FV),breakdown viscosity(BV),pasting time(PTim),and pasting temperature(PTemp)of non-waxy proso *** fertilizer treatment(CF2)increased the peak viscosity(PV),hot viscosity(HV),breakdown viscosity(BV),final viscosity(FV),pasting time(PTim),and pasting temperature(PTemp)of waxy proso *** fertilizer treatment(HF4)and phosphate fertilizer treatment(CF2)under low nitrogen were the most effective in improving the comprehensive quality of non-waxy and waxy proso millet,r

关键词： Proso millet low nitrogen yield quality

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Rapid Detection of Fat Content in Chenopodium quinoa Willd by Near Infrared Spectroscopy

引用

Agricultural Biotechnology 2018年第4期7卷 115-117页

作者： Xiaoning CAO Junjie WANG sichen liu Zhijun QIAO Institute of Crop Germplasm Resources Shanxi Academy of Agricultural SciencesTianyuan 030031China Key Laboratory of Crop Gene Resources and Germplasm Enhancement on Loess Plateau Ministry of AgricultureTianyun 030031China Shanxi Key Laboratory of Genetic Resources and Genetic Improvement of Minor Crops Tianyun 030031China

This study was conducted to find a method for rapid determination of fat content in complete quinoa （ Chenopodium quinoa Willd） seeds. The near infrared spectra of 100 quinoa samples were collected, and a mathematic model was built using the near infrared spectra, so as to perform prediction. The results showed that within the wavelength range of 1 0 000-4 000 cm ^-1 , the quantification model of fat content built by first derivative ＋vector normalization spectral pre-processing had better calibration and prediction effects, and showed a determination coefficient of cross validation （ r cv^ 2 ） of 0.939 3 and a determination coefficient of validation （ rval^2 ） of 0.923 5. The near infrared spectral model of fat could be used for rapid detection of fat contents in quinoa.

关键词： Chenopodium quinoa Willd Fat Near infrared spectroscopy Rapid detection

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中国贸易开放度的比较分析

引用

统计研究 2005年第6期22卷 24-27页

作者：刘似臣北京交通大学经济管理学院经济系

This paper briefly surveys the literature of measures of trade openness and points out the main factors affected the size of trade openness. Then we estimate the trade intensity in China and adjust it after several selected *** conclusion is that the nominal trade intensity in China has been larger than its theoretical value, especially for 2001～2003. Reasons for the deviation of 2001～2003 are (1) the lag effect of the accession into WTO; (2) the depreciation of USD and (3) other trade policy and industry policy.

关键词：贸易开放度比较分析中国

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Rapid Detection of Starch Content in Quinoa(Chenopodium quinoa Willd.)by Near Infrared Spectroscopy

引用

Agricultural Biotechnology 2018年第5期7卷 212-214页

This study was conducted to establish a method for rapid determination of crude starch content in complete quinoa （ Chenopodium quinoa Willd） seeds. The near infrared spectra of 100 quinoa samples were collected, and a mathematic model was built using the near infrared spectra within the wavelength range of 1 0 000-4 000 cm^-1 by first derivative ＋vector normalization spectral pre-processing. The results showed that the quantification model of starch content had better calibration and prediction effects, and showed a determination coefficient of cross validation （ r^2 cv ） of 0.914 7 and a determination coefficient of validation （ r^2 val ） of 0.903 1. The determination of starch content in complete quinoa seeds by near infrared spectroscopy is totally feasible.

关键词： Chenopodium quinoa Willd. Starch Near infrared spectroscopy

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

MULTIPLE EQUILIBRIA IN BAROCLINIC ATMOSPHERE BY THERMAL FORCING RELATED TO SUBTROPICAL HIGH

引用

Science China Chemistry 1987年第11期31卷 1199-1210页

作者：刘四臣李维亮 Academy of Meteorological Sciences State Meteorology Administration Beijing

By using Lorenz’s moist general circulation model, a nonlinear and dissipative system describing atmospheric motion has been obtained in approximation of Low *** multiple equilibria and the transformation between the flow patterns of winter and summer, the latitudinal oscillation of subtropical high by thermal forcing and nonlinear interaction of general circulation are studied in this *** results show that the transformation of flow patterns is a discontinuous leaping, and is a process of resetting new flow pattern by rapid exchange inflow *** the corresponding dry model, we cannot find the latitudinal oscillation of the center of subtropical *** the moist model, after the thermal effect of water vapor is drawn into the model, nonlinear interaction appears between flow and heating *** effect helps to bring about the latitudinal oscillation of subtropical high.

关键词： high MULTIPLE EQUILIBRIA IN BAROCLINIC ATMOSPHERE BY THERMAL FORCING RELATED TO SUBTROPICAL HIGH

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Distributed Adaptive Integral Sliding Mode Attitude Consensus Control for Multiple Autonomous Underwater Vehicles

Distributed Adaptive Integral Sliding Mode Attitude Consensu...

引用

第37届中国控制会议

作者： sichen liu Qing Fei Bo Wang Qingbo Geng Beijing Institute of Technology

This paper investigates the attitude consensus problem of multiple Autonomous Underwater Vehicles（AUVs） in the case of communication delay with the directed communication network. A distributed adaptive integral sliding mode controller is designed for each vehicle to track the desired attitude. The inertia uncertainty and external disturbance in the dynamics of AUV are considered in designing the control law. The stability of the multi-AUV system is proved by Lyapunov theory. Finally, the simulation results are given to confirm the effectiveness of the proposed control law.

关键词： Multiple Autonomous Underwater Vehicles attitude consensus adaptive control integral sliding mode control

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

基于多传感器融合的刀具剩余寿命预测

引用

振动与冲击 2021年第17期40卷 47-54页

作者：刘思辰杨飞然杨军中国科学院噪声与振动重点实验室(声学研究所) 北京100190 中国科学院大学北京100049

为了提高刀具磨损状态的预测精度,提出了一种基于多传感器融合的刀具剩余寿命预测方法。在训练阶段,首先联合振动、电流、以及PLC控制器信息进行数据预处理并利用时间序列分析等方法进行特征提取。然后针对单帧样本缺乏上下文信息且无... 详细信息

为了提高刀具磨损状态的预测精度,提出了一种基于多传感器融合的刀具剩余寿命预测方法。在训练阶段,首先联合振动、电流、以及PLC控制器信息进行数据预处理并利用时间序列分析等方法进行特征提取。然后针对单帧样本缺乏上下文信息且无法全部覆盖整个生命周期数据的问题,采用多帧联合与mix-up方法对数据进行增强。最后设计一个深度神经网络来学习多模态输入特征与刀具剩余寿命之间的复杂非线性函数。在测试阶段,对网络输出结果进行中值滤波去除噪声影响得到最终预测值。试验结果表明,多模态数据的使用与数据增强的引入均可显著提升刀具磨损量的预测精度。

关键词：剩余寿命预测刀具状态监测多传感器信息融合数据增强深度神经网络

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

金砖国家装备制造业出口增加值比较研究

引用

统计研究 2018年第8期35卷 48-57页

作者：刘似臣张诗琪北京交通大学

本文将KWW法扩展,从产业角度提出出口增加值核算方法。分解量化金砖国家装备制造业出口增加值,比较其在全球产业间的流动。不仅得到更真实的贸易利得,还实现了对出口增加值在全球行业间流动的动态分析。结果显示:①2000-2014年,中国该... 详细信息

本文将KWW法扩展,从产业角度提出出口增加值核算方法。分解量化金砖国家装备制造业出口增加值,比较其在全球产业间的流动。不仅得到更真实的贸易利得,还实现了对出口增加值在全球行业间流动的动态分析。结果显示:①2000-2014年,中国该行业出口增加值快速增长,远高于其他国家。2013年后增速回落,出口增加值率先降后升稳定于30%。中国、巴西、俄罗斯出口增加值率为30%左右,印度最低。②从全球流动现状看,金砖国家最终产品出口增加值占比较高。其中,中国和巴西中间产品贸易有较大增加,深入到全球价值链分工体系。中国的重复统计项和出口返回部分最高。而俄罗斯、印度最终产品贸易比重不断增加。在生产日益"碎片化"背景下,扩展的KWW法对研究出口增加值有重要的理论意义。

关键词：出口增加值扩展的KWW方法金砖国家装备制造业

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Control Effects of Different Doses of MCPA-Na Against Weeds in Foxtail Millet Field

引用

Plant Diseases and Pests 2017年第1期8卷 24-26,38页

作者： Cao Xiaoning Wang Junjie liu sichen Chen Ling Wang Haigang Tian Xiang Qiao Zhijun Institute of Crop Germplasm Resources Shanxi Academy of Agricultural SciencesTaiyuan 030031China Key Laboratory of Crop Gene Resources and Germplasm Enhancement on Loess Plateau the Ministry of AgricultureTaiyuan 030031China Shanxi Key Laboratory of Genetic Resources and Genetic Improvement of Minor Crops Taiyuan 030031China

[ Objective] The paper was compare the control effects of different doses of MCPA-Na on weeds in foxtail millet field. [ Method ] Different doses of MC- PA-Na were sprayed on foxtail millet field, while artificial weeding and spraying water was designed as control. The strain control effect and fresh weight control effect were calculated. [Result]The strain control effect and fresh weight control effect of 2 250 g/hm^2 MCPA-Na at 25 and 40 d post spraying were the best, and the fresh weight control effects reached 84.19% and 87.23%, respectively. Compared to CK, the yield increase effect of 1 500 g/hm^2 was the best, and the yield increase rate was 54.31% ; followed by 1 125 g/hm^2. Generally, 1 500 g/hm^2 was the best dosage of MCPA-Na in foxtail millet production. [ Conclusion]The paper provided a theoretical basis for screening the best dose of herbicide in foxtail millet production.

关键词： Foxtail millet MCPA-Na Control effect

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

数字经济背景下ICT货物贸易的影响因素分析——以“一带一路”沿线国家(地区)为例

引用

工业技术经济 2022年第1期41卷 78-85页

作者：刘似臣支国林北京交通大学经济管理学院北京100044

本文在阐述“一带一路”沿线国家(地区)ICT(信息通信技术)货物贸易现状的基础上,利用2007~2019年贸易流量数据与空间杜宾模型,实证分析贸易格局与国家产业基础、资源禀赋、营商环境等因素的关系。研究发现:(1)“一带一路”沿线国家(地区... 详细信息

本文在阐述“一带一路”沿线国家(地区)ICT(信息通信技术)货物贸易现状的基础上,利用2007~2019年贸易流量数据与空间杜宾模型,实证分析贸易格局与国家产业基础、资源禀赋、营商环境等因素的关系。研究发现:(1)“一带一路”沿线国家(地区)ICT货物贸易呈现出两边高-中间低的空间格局,产业基础是主要影响因素,并存在正向的空间溢出效应;(2)改善本国营商环境、提高城市化水平、扩大经济体量是每个沿线国家(地区)改变其ICT贸易格局的有利举措。同时需要注意对外直接投资、汇率及关税的调节作用,重视经济合作组织的影响;(3)我国应充分发挥贸易的直接和间接效应,积极拓展ICT产业新型基础设施建设,满足人们日益增长的带宽需要及通信需求。

关键词： ICT 货物贸易 “一带一路” 空间杜宾模型产业基础营商环境新型基础设施建设

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：