期刊文献+
共找到10篇文章
< 1 >
每页显示 20 50 100
基于柔性参数化功构单元模型的产品定制设计
1
作者 王德彪 龚京忠 +1 位作者 吴建忠 杨尚飞 《机械制造》 2008年第8期63-65,共3页
根据产品功能结构映射关系,在面向功能需求的产品分解过程中,通过功能-行为-结构(FBS)的多次迭代,建立产品的功构单元模型,利用产品功构单元模型和客户需求之间的映射关系,建立能用虚拟参数单元形式表示的功构单元模型结构树。通过数据... 根据产品功能结构映射关系,在面向功能需求的产品分解过程中,通过功能-行为-结构(FBS)的多次迭代,建立产品的功构单元模型,利用产品功构单元模型和客户需求之间的映射关系,建立能用虚拟参数单元形式表示的功构单元模型结构树。通过数据的输入实现产品的定制设计,满足大批量定制中客户的多样化、个性化需求。 展开更多
关键词 大批量定制 单元模型 柔性参数化单元模型 定制设计
下载PDF
面向配置设计的产品功构建模方法 被引量:11
2
作者 谢清 谭建荣 冯毅雄 《计算机辅助设计与图形学学报》 EI CSCD 北大核心 2006年第4期574-579,共6页
针对产品配置设计过程中存在的客户和设计者之间交互语义一致性以及功能域与结构域之间映射等问题,鉴于事物特性表技术,通过规定产品信息的数据格式使产品数据能在不同系统之间进行交流,提出了基于事物特性表的产品需求信息元方法,构造... 针对产品配置设计过程中存在的客户和设计者之间交互语义一致性以及功能域与结构域之间映射等问题,鉴于事物特性表技术,通过规定产品信息的数据格式使产品数据能在不同系统之间进行交流,提出了基于事物特性表的产品需求信息元方法,构造了面向配置设计的功构模型;着重探讨了模型的优化算法及基于功构模型的产品配置设计流程;最后给出了面向配置设计的产品功构建模应用实例· 展开更多
关键词 配置设计 功构模型 需求信息元 事物特性表
下载PDF
Virtual Plant Modeling Based on Mutual Feedback of Function-structure 被引量:1
3
作者 范振岐 司春景 +2 位作者 曹洪武 韩旭 李文华 《Agricultural Science & Technology》 CAS 2011年第12期1972-1974,共3页
[Objective] To study virtual plant modeling based on mutual feedback of function-structure.[Method] With the analysis of the shortcomings of current virtual plant modeling method,the modeling with the idea of function... [Objective] To study virtual plant modeling based on mutual feedback of function-structure.[Method] With the analysis of the shortcomings of current virtual plant modeling method,the modeling with the idea of function-structure mutual feedback was put forward,and the steps of this modeling were elaborated,including the determination of morphological structure model,biomass production model,biomass allocation model,organ reconstruction model,and the integration method of function model and morphological structure model.[Results] The breakthrough of function-structure mutual feedback based mechanism from the boundaries of physiological ecology model and morphological structure model can solve the difficulty of data transmission between the two models and build an integrated model from the two,which can effectively reflect the incidence relation between plant morphology and function,and more suitable for the growth mechanisms of plants.This modeling approach has significant advantages in the dynamic simulation of plant growth.[Conclusion] The virtual plant modeling based on function-structure mutual feedback provides basis for the simulation of plant growth status in the next stage,and has important significance for the accurate simulation of the dynamic growth process of plant. 展开更多
关键词 Structure-function model Mutual feedback mechanism Virtual plant
下载PDF
A Numerical Verification of Self-Similar Multiplicative Theory for Small-Scale Atmospheric Turbulent Convection 被引量:2
4
作者 SONG Zong-Peng HU Fei +3 位作者 LIU Yu-Jue CHENG Xue-Ling LIU Lei XU Jing-Jing 《Atmospheric and Oceanic Science Letters》 CSCD 2014年第2期98-102,共5页
The self-similar multiplicative theory(SSM theory), aims to interpret the scaling behavior of the temperature structure function. In the present paper, the author report results from a numerical simulation of atmosphe... The self-similar multiplicative theory(SSM theory), aims to interpret the scaling behavior of the temperature structure function. In the present paper, the author report results from a numerical simulation of atmospheric turbulent convection in order to verify this theory. The simulation was based on a shell model which was deduced from simplified atmospheric convection equations. The numerical results agreed well with the theory prediction of scaling law from the first order to the eighth order. They also showed that the prediction of this theory was better than that given by the Kolmogorov's theory in 1941, log-normal, and β model theories. 展开更多
关键词 turbulent convection structure function scaling law shell model
下载PDF
A data structure and function classification based method to evaluate clustering models for gene expression data
5
作者 易东 杨梦苏 +2 位作者 黄明辉 李辉智 王文昌 《Journal of Medical Colleges of PLA(China)》 CAS 2002年第4期312-317,共6页
Objective:To establish a systematic framework for selecting the best clustering algorithm and provide an evaluation method for clustering analyses of gene expression data. Methods: Based on data structure (internal in... Objective:To establish a systematic framework for selecting the best clustering algorithm and provide an evaluation method for clustering analyses of gene expression data. Methods: Based on data structure (internal information) and function classification (external information), the evaluation of gene expression data analyses were carried out by using 2 approaches. Firstly, to assess the predictive power of clusteringalgorithms, Entropy was introduced to measure the consistency between the clustering results from different algorithms and the known and validated functional classifications. Secondly, a modified method of figure of merit (adjust-FOM) was used as internal assessment method. In this method, one clustering algorithm was used to analyze all data but one experimental condition, the remaining condition was used to assess the predictive power of the resulting clusters. This method was applied on 3 gene expression data sets (2 from the Lyer's Serum Data Sets, and 1 from the Ferea's Saccharomyces Cerevisiae Data Set). Results: A method based on entropy and figure of merit (FOM) was proposed to explore the results of the 3 data sets obtained by 6 different algorithms, SOM and Fuzzy clustering methods were confirmed to possess the highest ability to cluster. Conclusion: A method based on entropy is firstly brought forward to evaluate clustering analyses.Different results are attained in evaluating same data set due to different function classification. According to the curves of adjust_FOM and Entropy_FOM, SOM and Fuzzy clustering methods show the highest ability to cluster on the 3 data sets. 展开更多
关键词 gene expression evaluation of clustering adjust- FOM ENTROPY
下载PDF
Multilevel Power Modeling of Base Station and Its ICs 被引量:1
6
作者 WANG Wei LI Xiaoyang +2 位作者 LIU Dake CAI Zhaoyun GONG Chen 《China Communications》 SCIE CSCD 2015年第5期22-33,共12页
A new power estimation method is proposed for base station(BS) in this paper.Based on this method,a software platform for power estimation is developed.The proposed method models power consumption on different abstrac... A new power estimation method is proposed for base station(BS) in this paper.Based on this method,a software platform for power estimation is developed.The proposed method models power consumption on different abstraction levels by splitting a typical base station into several basic components at different levels in the view of embedded system design.In particular,our focus is on baseband IC(Integrate Circuit) due to it's the dominant power consumer in small cells.Baseband power model is based on arithmetic computing costs of selected algorithms.All computing and storage costs are calibrated using algorithm complexity,hardware architecture,activity ratio,silicon technology,and overheads on all hierarchies.Micro architecture and IC technology are considered.The model enables power comparison of different types of base stations configured with different baseband algorithms,micro architectures,and ICs.The model also supports cellular operators in power estimation of different deployment strategies and transmission schemes.The model is verified by comparing power consumption with a real LTE base station.By exposing more configuration freedoms,the platform can be used for power estimation of current and future base stations. 展开更多
关键词 baseband IC power consumption power modeling base station 5G
下载PDF
Heterogeneous Quality of Experience Guarantees Over Wireless Networks 被引量:2
7
作者 Jianyu Wang Wenchi Cheng 《China Communications》 SCIE CSCD 2018年第10期51-59,共9页
Quality of experience(Qo E), which is very critical for the experience of users in wireless networks, has been extensively studied. However, due to different human perceptions, quantifying the effective capacity of wi... Quality of experience(Qo E), which is very critical for the experience of users in wireless networks, has been extensively studied. However, due to different human perceptions, quantifying the effective capacity of wireless network subject to diverse Qo E is very difficult, which leads to many new challenges regarding Qo E guarantees in wireless networks. In this paper, we formulate the Qo E guarantees model for cellular wireless networks. Based on the model, we convert the effective capacity maximization problem into the equivalent convex optimization problem. Then, we develop the optimal Qo E-driven power allocation scheme, which can maximize the effective capacity. The obtained simulation results verified our proposed power allocation scheme, showing that the effective capacity can be significantly increased compared with that of traditional Qo E guarantees based schemes. 展开更多
关键词 wireless network effective capacity power allocation HETEROGENEOUS qualityof experience quality of service
下载PDF
On the ways of cultivating the creativity of talents
8
作者 Wu Xia 《International English Education Research》 2014年第2期87-92,共6页
The creative talents are of constructive significance to the development of the country. Starting from the early exploration and the scientific definition of the creativity of the talents, this article summarizes the ... The creative talents are of constructive significance to the development of the country. Starting from the early exploration and the scientific definition of the creativity of the talents, this article summarizes the research achievements of the creativity of talents in China from three aspects of the determination of the nature and the research of the structural model, the research of the relationship between creativity and other factors, and the development and research of the cross cultural creativity. And from the perspective of the theory and the practice, the author puts forward the ways to cultivate the creativity of the talents from the five dimensions of optimizing the development of the brain functions, improving the abilities of the thinking, judgment and control, debugging the emotional stability and the creative personality, striving to improve the teachers' creativity, and drawing lessons from the practical experience of training innovative talents in western countries. 展开更多
关键词 Talents CREATIVITY
下载PDF
Excess Heat Power Registration in Experiments with High Voltage Electric Discharge Systems
9
作者 Alexander Karabut 《Journal of Energy and Power Engineering》 2013年第9期1735-1744,共10页
The author review results on LENR (low-energy nuclear reaction) processes in the cathodes of a high current glow discharge and a HVEC (high-voltage electrolysis cell). The cathodes used in the experiments were mad... The author review results on LENR (low-energy nuclear reaction) processes in the cathodes of a high current glow discharge and a HVEC (high-voltage electrolysis cell). The cathodes used in the experiments were made of Ni foil, Pd foil, Pd coated Re and solid-state nanostructured Pd. Up to 300 W of excess heat power, with a power gain up to 340%, was observed in experiments using a high-voltage electrolysis cell. Based on these experimental results, we propose a phenomenological model for LENR. 展开更多
关键词 High-voltage discharge excess heat impurity nuclides X-ray emission.
下载PDF
On the ways of cultivating the creativity of talents
10
作者 Wu Xia 《International English Education Research》 2014年第5期57-61,共5页
The creative talents are of constructive significance to the development of the country. Starting from the early exploration and the scientific definition of the creativity of the talents, this article summarizes the ... The creative talents are of constructive significance to the development of the country. Starting from the early exploration and the scientific definition of the creativity of the talents, this article summarizes the research achievements of the creativity of talents in China from three aspects of the determination of the nature and the research of the structural model, the research of the relationship between creativity and other factors, and the development and research of the cross cultural creativity. And from the perspective of the theory and the practice, the author puts forward the ways to cultivate the creativity of the talents from the five dimensions of optimizing the development of the brain functions, improving the abilities of the thinking, judgment and control, debugging the emotional stability and the creative personality, striving to improve the teachers' creativity, and drawing lessons from the practical experience of training innovative talents in western countries. 展开更多
关键词 Talents CREATIVITY
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部