期刊文献+
共找到3,286篇文章
< 1 2 165 >
每页显示 20 50 100
Functional Orientation and Practice of Inductive and Deductive Approaches to Grammar Teaching in EFL
1
作者 邵阳 《英语广场(学术研究)》 2011年第Z6期57-58,共2页
To solve the ambiguous understanding of Grammar Teaching position,based on explicit grammatical knowledge,this paper discusses the grammar position in EFL,compares both its pros and cons between deductive and inductiv... To solve the ambiguous understanding of Grammar Teaching position,based on explicit grammatical knowledge,this paper discusses the grammar position in EFL,compares both its pros and cons between deductive and inductive approaches,and indicates that grammar teaching by either approach alone has disadvantages,should adopt a combination technique. 展开更多
关键词 GRAMMAR teaching deductive APPROACH INDUCTIVE APPROACH explicit GRAMMATICAL knowledge
在线阅读 下载PDF
Deductive Systems in Hyper EQ-Algebras 被引量:1
2
作者 Xiaoyun CHENG Xiaolong XIN Yongwei YANG 《Journal of Mathematical Research with Applications》 CSCD 2017年第2期183-193,共11页
In this paper, we introduce and investigate some types of deductive systems in hyper EQ-algebras and discuss relationships among them. Especially, we focus on investigating two types of important deductive systems, na... In this paper, we introduce and investigate some types of deductive systems in hyper EQ-algebras and discuss relationships among them. Especially, we focus on investigating two types of important deductive systems, namely, (positive) implicative strong deductive systems, respectively. Moreover we give equivalent characterizations of them. 展开更多
关键词 hyper EQ-algebra (strong) deductive system (positive) implicative strong de-ductive system S→-reflexive subset S -semiclosed subset
原文传递
Research on Design Method of the Full Form Ship with Minimum Thrust Deduction Factor 被引量:2
3
作者 张宝吉 缪爱琴 张竹心 《China Ocean Engineering》 SCIE EI CSCD 2015年第2期301-310,共10页
In the preliminary design stage of the full form ships, in order to obtain a hull form with low resistance and maximum propulsion efficiency, an optimization design program for a full form ship with the minimum thrust... In the preliminary design stage of the full form ships, in order to obtain a hull form with low resistance and maximum propulsion efficiency, an optimization design program for a full form ship with the minimum thrust deduction factor has been developed, which combined the potential flow theory and boundary layer theory with the optimization technique. In the optimization process, the Sequential Unconstrained Minimization Technique(SUMT) interior point method of Nonlinear Programming(NLP) was proposed with the minimum thrust deduction factor as the objective function. An appropriate displacement is a basic constraint condition, and the boundary layer separation is an additional one. The parameters of the hull form modification function are used as design variables. At last, the numerical optimization example for lines of after-body of 50000 DWT product oil tanker was provided, which indicated that the propulsion efficiency was improved distinctly by this optimal design method. 展开更多
关键词 optimization minimum thrust deduction factor NLP Rankine source method boundary layer separation
在线阅读 下载PDF
Research on key technologies of deduction of multinational power trading in the context of Global Energy Interconnection 被引量:1
4
作者 Jijie Huang Changnian Lin +2 位作者 Haiming Zhou Zhengqing Xu Chunzhe Lin 《Global Energy Interconnection》 2019年第6期561-567,共7页
When transnationalized electricity trade is conducted in the context of Global Energy Interconnection(GEI),the transaction settlement usually has a long cycle and high cost and is influenced by the volatility of the e... When transnationalized electricity trade is conducted in the context of Global Energy Interconnection(GEI),the transaction settlement usually has a long cycle and high cost and is influenced by the volatility of the exchange rate.It is thus necessary to overcome the problems associated with the transaction settlement,change in the trading model data,and trading strategy in the transnational transaction deduction.To overcome the problem of trade settlement,this paper proposes the use of a digital currency(energy currency)for the cross-border electricity trading settlement based on the special drawing rights of the International Monetary Fund,which is controlled by the Global Energy Interconnection Development and Cooperation Organization(GEIDCO),to enable the proposed currency to become a stable digital currency.The traders can use the energy coins as a unit of currency for quotes,combined with the data pertaining to the changes in the energy information obtained from the GEI framework and data regarding the optimally extrapolated reference trading indicators.To realize the implementation of the multi-trader concurrent transaction deduction using a microservice architecture,this paper proposes a method of computing the microservice and synchronous interaction among the traders,based on the database table data,because the large amount of computation is required to be accomplished asynchronously with a single process.The key technology behind these cross-national electricity trading simulations can not only enable the GEI transnational traders to performed daily real-time trading,but it also demonstrates the advantages of the rapid settlement of the energy currency and the realization of a stable payment in the global energy interconnection cross-border electricity trading. 展开更多
关键词 Global En ergy Interconn ection Multinational power trading deducti on Micro-service Digital curre ncy
在线阅读 下载PDF
DEDUCTION OF CONSTRAINT CONDITIONS IN THE CALIBRATION OF STEREO-VISION SYSTEN
5
作者 FENG Wenhao, Professor, School of Information Engineering, WTUSM, Wuhan, China, 430079 《Geo-Spatial Information Science》 1998年第1期33-37,共5页
In the test-field calibration,multi-azimuth stereo image pairs areproduced of the outdoor large control-field by the stereo-vision system under cali-bration.While in the analytical processing,the relationship between ... In the test-field calibration,multi-azimuth stereo image pairs areproduced of the outdoor large control-field by the stereo-vision system under cali-bration.While in the analytical processing,the relationship between image pairsis adopted as a constraint condition,which ensures the stability and quality of thecalibration results.This paper introduces the deduction process of the constraintconditions. 展开更多
关键词 STEREO-VISION system CONSTRAINT CONDITION control-field deductION
在线阅读 下载PDF
THE OPTIMAL DEDUCTIBLE AND COVERAGE IN INSURANCE CONTRACTS AND EQUILIBRIUM RISK SHARING POLICIES
6
作者 蹇玲玲 《Acta Mathematica Scientia》 SCIE CSCD 2023年第3期1347-1364,共18页
In this paper, we consider the optimal risk sharing problem between two parties in the insurance business: the insurer and the insured. The risk is allocated between the insurer and the insured by setting a deductible... In this paper, we consider the optimal risk sharing problem between two parties in the insurance business: the insurer and the insured. The risk is allocated between the insurer and the insured by setting a deductible and coverage in the insurance contract. We obtain the optimal deductible and coverage by considering the expected product of the two parties' utilities of terminal wealth according to stochastic optimal control theory. An equilibrium policy is also derived for when there are both a deductible and coverage;this is done by modelling the problem as a stochastic game in a continuous-time framework. A numerical example is provided to illustrate the results of the paper. 展开更多
关键词 deductible and coverage equilibrium policy stochastic optimal control Hamilton-Jacobi-Bellman equation
在线阅读 下载PDF
A genetic algorithm for dynamic parameters reverse deduction of integrated anchorage system
7
作者 张永兴 《Journal of Chongqing University》 CAS 2006年第1期46-49,共4页
In the analysis of the system of anchoring bar and wall rock in small strain and longitudinal vibration dynamic response, the influence of the cement grouting as well as the rock layer on the anchor bar can be evaluat... In the analysis of the system of anchoring bar and wall rock in small strain and longitudinal vibration dynamic response, the influence of the cement grouting as well as the rock layer on the anchor bar can be evaluated as the two kinds of parameters: the dynamic stiffness and the damp, which are the vital reference of the anchorage quality. Based on the analytic solution to the dynamic equation of the integrated anchor bar, the new approach which combines genetic algorithm and the toolbox of Matlab is applied to solve the problem of multi-parameters reverse deduction for integrated anchorage system in dynamic testing. Using the traits of the self-organizing, self-adapting and the fast convergence speed of the genetic algorithm, the optimum of all possible solutions to dynamic parameters is obtained by calculating the project instances. Examples show that the method presented in this paper is effective and reliable. 展开更多
关键词 integrated anchorage dynamic parameters reverse deduction genetic algorithm
在线阅读 下载PDF
Deduction Theorem and Hypothetical Syllogism Rule on Fuzzy Logic System
8
作者 YANGXiao-bin DENGShu-xian 《Chinese Quarterly Journal of Mathematics》 CSCD 北大核心 2005年第2期206-213,共8页
Cancelled the first axiom L1) or the third axiom L3) of the classical formal logic system we established two kinds of quasi-formal deductive system, LG-R^* and LG^* respectively. In LG-R^* we proved that neither the d... Cancelled the first axiom L1) or the third axiom L3) of the classical formal logic system we established two kinds of quasi-formal deductive system, LG-R^* and LG^* respectively. In LG-R^* we proved that neither the deduction theorem nor the hypothetical syllogism (HS) rule held but a deduction theorem and an HS rule are obtained in a weak sense. We also proved that both the deduction theorem and the hypothetical syllogism(HS) rule hold in LG^*. 展开更多
关键词 fuzzy logic system deduction theorem hypothetical syllogism(HS) rule weak HS rule
在线阅读 下载PDF
Implementing Semantic Deduction of Propositional Knowledge in an Extension Multi-layer Perceptron
9
作者 HUANG Tian-min,PEI Zheng (Department of Applied Mathematics, Southwest Jiaotong Universi ty,Chengdu 610031,China) 《Chinese Quarterly Journal of Mathematics》 CSCD 2003年第3期247-257,共11页
The paper presents an extension multi-laye r p erceptron model that is capable of representing and reasoning propositional know ledge base. An extended version of propositional calculus is developed, and its some prop... The paper presents an extension multi-laye r p erceptron model that is capable of representing and reasoning propositional know ledge base. An extended version of propositional calculus is developed, and its some properties is discussed. Formulas of the extended calculus can be expressed in the extension multi-layer perceptron. Naturally, semantic deduction of prop ositional knowledge base can be implement by the extension multi-layer perceptr on, and by learning, an unknown formula set can be found. 展开更多
关键词 multi-layer perceptron extension multi-layer perce p tron propositional calculus propositional knowledge buse semantic deduction
在线阅读 下载PDF
Tool Wear Optimization for General CNC Turning Using Fuzzy Deduction
10
作者 Tian-Syung Lan 《Engineering(科研)》 2010年第12期1019-1025,共7页
Tool wear is frequently considered in the modern CNC (computer numerical control) turning industry. Most existing optimization researches for CNC finish turning were either accomplished within certain manufacturing ci... Tool wear is frequently considered in the modern CNC (computer numerical control) turning industry. Most existing optimization researches for CNC finish turning were either accomplished within certain manufacturing circumstances, or achieved through numerous equipment operations. Therefore, a general deduction optimization scheme proposed is deemed to be necessary for the industry. In this paper, four parameters (cutting depth, feed rate, speed, tool nose runoff) with three levels (low, medium, high) are considered to optimize the tool wear for finish turning based on orthogonal array. Additionally, nine fuzzy control rules using triangle membership function with respective to five linguistic grades for tool wear are constructed. Considering four input and twenty output intervals, the defuzzification using center of gravity is then completed and introduced as the S/N (signal-to-noise) ratio. Thus, the optimum general deduction parameters can then be received. The confirmation experiment for optimum general deduction parameters is furthermore performed on an ECOCA-3807 CNC lathe. It is shown that the tool wear ratio from the fuzzy deduction optimization parameters is significantly advanced comparing to those from benchmark. This paper not only proposes a general deduction optimization scheme using orthogonal array, but also contributes the satisfactory fuzzy linguistic approach to tool wear in CNC turning with profound insight. 展开更多
关键词 CNC General OPTIMIZATION FUZZY deductION Tool WEAR RATIO
暂未订购
The Effect of Integrating Inductive Approach and Deductive Approach With Multimedia Assistance Into Acquisition of Subjunctive Mood
11
作者 JIANG Xin 《Sino-US English Teaching》 2012年第9期1510-1515,共6页
This study applied both inductive approach and deductive approach with multimedia assistance into an English grammar class on the acquisition of subjunctive mood. It aimed to investigate whether this kind of teaching ... This study applied both inductive approach and deductive approach with multimedia assistance into an English grammar class on the acquisition of subjunctive mood. It aimed to investigate whether this kind of teaching approach, as a general grammar pedagogy, would improve the efficiency of students' acquisition of certain grammar points. This study results from comparison and contrast between one same class on the acquisition of subjunctive mood to 70 students in total, employing three different teaching methods: inductive approach with multimedia assistance (method 1), deductive approach with multimedia assistance (method 2), and both inductive approach and deductive approach with multimedia assistance (method 3), based on self-reported reflection on the experiment, observation of students' learning process, students' pre-test and after-class evaluation test results, and surveys. Two identical experiments were conducted to two groups of students of different levels of language proficiency to increase the generalizability of the results. Findings revealed that the evaluation test score of the grammatical points taught with method 3 is much higher than those taught with the other two methods, and most students felt positive about method 3. Students nevertheless encounter obvious difficulties in inductive approach, indicating certain lack of self-learning skills in Chinese students 展开更多
关键词 inductive approach deductive approach multimedia assistance subjunctive mood grammar teaching
在线阅读 下载PDF
Emotion Deduction from Social Media Text Data Using Machine Learning Algorithm
12
作者 Thambusamy Velmurugan Baskaran Jayapradha 《Journal of Computer and Communications》 2023年第11期183-196,共14页
Emotion represents the feeling of an individual in a given situation. There are various ways to express the emotions of an individual. It can be categorized into verbal expressions, written expressions, facial express... Emotion represents the feeling of an individual in a given situation. There are various ways to express the emotions of an individual. It can be categorized into verbal expressions, written expressions, facial expressions and gestures. Among these various ways of expressing the emotion, the written method is a challenging task to extract the emotions, as the data is in the form of textual dat. Finding the different kinds of emotions is also a tedious task as it requires a lot of pre preparations of the textual data taken for the research. This research work is carried out to analyse and extract the emotions hidden in text data. The text data taken for the analysis is from the social media dataset. Using the raw text data directly from the social media will not serve the purpose. Therefore, the text data has to be pre-processed and then utilised for further processing. Pre-processing makes the text data more efficient and would infer valuable insights of the emotions hidden in it. The preprocessing steps also help to manage the text data for identifying the emotions conveyed in the text. This work proposes to deduct the emotions taken from the social media text data by applying the machine learning algorithm. Finally, the usefulness of the emotions is suggested for various stake holders, to find the attitude of individuals at that moment, the data is produced. . 展开更多
关键词 Data Pre-Processing Machine Learning Algorithms Emotion deduction Sentiment Analysis
在线阅读 下载PDF
A theoretical deduction for the location of neutral axis in intestine at unloaded configuration
13
作者 Brent Witgen 《医用生物力学》 EI CAS CSCD 2009年第S1期47-47,共1页
The function of Gastrointestinal tract including intestine is to a large degree mechanical.The mechanical properties of the intestinal wall,and the tonic (sustained) and/or phasic(short-
关键词 A theoretical deduction for the location of neutral axis in intestine at unloaded configuration
原文传递
Deduction of plastic work rate per unit volume for unified yield criterion and its application 被引量:2
14
作者 赵德文 李婧 +1 位作者 刘相华 王国栋 《中国有色金属学会会刊:英文版》 CSCD 2009年第3期657-660,共4页
A unified linear expression of plastic work rate per unit volume is deduced from the unified linear yield criterion and the associated flow rule. The expression is suitable for various linear yield loci in the error t... A unified linear expression of plastic work rate per unit volume is deduced from the unified linear yield criterion and the associated flow rule. The expression is suitable for various linear yield loci in the error triangle between Tresca’s and twin shear stress yield loci on the π-plane. It exhibits generalization in which the different value of criterion parameter b corresponds to a specific linear formula of plastic work rate per unit volume. Finally, with the unified linear expression of plastic work rate and upper-bound parallel velocity field the strip forging without bulge is successfully analyzed and an analytical result is also obtained. The comparison with traditional solutions shows that when b=1/(1+ 3 ) the result is the same as the upper bound result by Mises’ yield criterion, and it also is identical to that by slab method with m=1, σ0=0. 展开更多
关键词 统一屈服准则 工作单位 塑料 体积 线性屈服准则 应用 屈服轨迹 流动法则
在线阅读 下载PDF
Background deduction of the Chang'E-1 gamma-ray spectrometer data
15
作者 ZHANG Liyan LI Chunlai +2 位作者 LIU Jinazhong ZOU Yongliao OUYANG Ziyuan 《Chinese Journal Of Geochemistry》 EI CAS 2012年第3期234-241,共8页
Gamma-ray spectrometer(GRS) is used to detect the elemental abundances and distributions on the lunar surface.To derive the elemental abundances,it is vital to acquire background gamma rays except lunar gamma rays.So ... Gamma-ray spectrometer(GRS) is used to detect the elemental abundances and distributions on the lunar surface.To derive the elemental abundances,it is vital to acquire background gamma rays except lunar gamma rays.So GRS would observe background spectra in the course of earth-moon transfer on schedule.But in fact,GRS was not switched on in the course of flying toward the moon.After the CE-1 probe finished one-year mission,GRS car-ried out a test on background data on November 21?22,2008.The authors did conduct research on the methods of background deduction using 2105 hours of usable gamma-ray spectra acquired at the 200-km orbital height by the GRS and more than 5 hours of gamma-ray spectra acquired in the GRS background test.The final research results showed that the method of deducting the background using the minimum counts in the CE-1 GRS pixels is optimal for the elements,U,K and Th.The method applies to such a case that the elemental abundances in the pixel with the minimum counting rate are 0 μg/g and the continuum background counts are constant over the Moon.Based on the method of background deduction,the full energy peak counts of U,K,and Th are calculated. 展开更多
关键词 背景扣除 γ射线谱仪 嫦娥一号 伽玛射线 表面元素 元素丰度 GRS 光谱仪
在线阅读 下载PDF
贝叶斯方法的基本原理及其哲学意蕴
16
作者 陈晓平 《哲学分析》 北大核心 2026年第1期155-168,199,共15页
贝叶斯方法现已成为一种新的科学范式,尤其体现于当前迅速发展的人工智能领域,它为AI系统提供了处理不确定性和动态更新概率的推理框架。从基本原理上讲,贝叶斯定理为人们从验前概率过渡到验后概率提供了逻辑依据,成为人们根据经验证据... 贝叶斯方法现已成为一种新的科学范式,尤其体现于当前迅速发展的人工智能领域,它为AI系统提供了处理不确定性和动态更新概率的推理框架。从基本原理上讲,贝叶斯定理为人们从验前概率过渡到验后概率提供了逻辑依据,成为人们根据经验证据来改变置信度的理性指导。然而,贝叶斯定理本身的合理性何在?这是休谟的归纳问题在贝叶斯方法中的体现,具体呈现为贝叶斯条件化规则的合理性问题。对此可提出“最小初始概率原则”给以回答。贝叶斯方法在科学推理的应用上,一个显著方面是用多理论检验模型取代传统的单理论检验模型即假设—演绎法,这不仅符合科学史的实际案例,而且通过“意见收敛定理”得到理论上的辩护。意见收敛定理的前提条件是可交换性,对之加以分析和澄清,可使该定理的应用范围从简单的重复独立试验扩展到复杂的科学验证。 展开更多
关键词 贝叶斯方法 假设—演绎法 意见收敛定理 归纳问题 贝叶斯条件化规则
在线阅读 下载PDF
澳门地区水浸灾害仿真推演与防控效果分析
17
作者 余晓 刘家宏 +3 位作者 李文 骆卓然 梅超 董莉榕 《中国水利》 2026年第2期53-59,共7页
气候变化背景下,滨海城市受潮位顶托、高度城镇化和高人口密度等因素叠加影响,水浸灾害频发,显现出水浸灾害防控能力不足、决策分析智能化程度较低等问题,开展滨海城市水浸灾害仿真推演研究具有重要现实意义。本文以澳门地区为研究对象... 气候变化背景下,滨海城市受潮位顶托、高度城镇化和高人口密度等因素叠加影响,水浸灾害频发,显现出水浸灾害防控能力不足、决策分析智能化程度较低等问题,开展滨海城市水浸灾害仿真推演研究具有重要现实意义。本文以澳门地区为研究对象,构建了滨海城市水浸灾害仿真推演系统,开展了重点工程防控效果的仿真推演分析。该系统具有城市水浸灾害模拟、三维视景推演等功能,通过了“天鸽”台风历史水浸灾害事件的系列测试验证,具有较高的模拟精度和三维可视化呈现能力。对新建挡潮闸、加高围堤等重点工程防控效果的仿真推演分析表明:挡潮闸的修建有效阻挡了闸外潮水,可显著减少澳门半岛西侧水浸灾害的影响,但澳门半岛东北侧部分区域仍然存在水浸现象;在修建挡潮闸的基础上,加高澳门半岛重点区域围堤后,澳门半岛东北部区域仅有零星的积水,最大积水深度不足10 cm。修建挡潮闸、加高围堤的组合,能有效防控澳门半岛水浸灾害风险。本研究可为滨海城市水浸灾害预防、应对和缓解提供科学化、系统化、可视化的仿真平台,能够为滨海城市水浸灾害科学管控提供参考和借鉴。 展开更多
关键词 滨海城市 水浸灾害 数值模拟 仿真推演 澳门半岛 数字孪生水利 洪涝灾害
在线阅读 下载PDF
研发费用加计扣除政策对数字企业创新的影响——基于A股上市企业的实证检验
18
作者 田发 向清雨 《科技管理研究》 2026年第1期33-44,共12页
为了评估研发费用加计扣除政策对数字企业创新活动所产生的实际影响及其政策成效,以2016—2022年A股上市数字企业为研究样本,构建研发费用实际加计扣除强度指标,对该政策的创新效应进行实证检验。研究发现:数字企业研发费用的平均实际... 为了评估研发费用加计扣除政策对数字企业创新活动所产生的实际影响及其政策成效,以2016—2022年A股上市数字企业为研究样本,构建研发费用实际加计扣除强度指标,对该政策的创新效应进行实证检验。研究发现:数字企业研发费用的平均实际扣除率仅为法定扣除率的72.9%,研发费用加计扣除政策能够促进数字企业创新水平的提高。机制分析显示,融资约束在研发费用加计扣除政策促进数字企业创新的过程中发挥中介作用。异质性分析表明,研发费用加计扣除政策对税收营商环境较好地区和大规模数字企业的创新激励效应更为显著。进一步分析发现,享受加计扣除优惠的研发费用具有更高的边际创新产出效应,并且研发费用加计扣除政策对数字企业的高质量创新具有更强的激励作用。基于上述发现,建议完善研发费用加计扣除政策,采取差异化政策支持以及增强该政策对数字企业高质量创新的激励作用。 展开更多
关键词 研发费用加计扣除政策 数字企业创新 研发费用实际加计扣除强度 高质量创新
在线阅读 下载PDF
Quasi-formal deductive system for fuzzy propositional calculus 被引量:8
19
作者 WANG GuojunInstitute of Mathematics, Shaanxi Normal University, Xi’an 710062, China 《Chinese Science Bulletin》 SCIE EI CAS 1997年第14期1154-1157,共4页
ELKAN’s report 'The paradoxical success of fuzzy logic' at the 11th IA Annual Conferenceof America in July, 1993 caused quite a great stir in the research field of IA as well as fuzzysystems, fifteen scholars... ELKAN’s report 'The paradoxical success of fuzzy logic' at the 11th IA Annual Conferenceof America in July, 1993 caused quite a great stir in the research field of IA as well as fuzzysystems, fifteen scholars published papers thereupon to refute it and finally Elkan answeredthem with his paper 'The paradoxical controversy over fuzzy logic'. An exclusive analysiscan be found in Prof. Wu Wangming’s paper. It seems from this event that fuzzy proposi- 展开更多
关键词 ΣR-tautology α-mod us ponens α-hypothetical SYLLOGISM quasi-formal deductive system.
在线阅读 下载PDF
上一页 1 2 165 下一页 到第
使用帮助 返回顶部