期刊文献+
共找到14篇文章
< 1 >
每页显示 20 50 100
结果法"在大学英语写作教学中的实用性 被引量:15
1
作者 罗瑜 《重庆大学学报(社会科学版)》 2003年第2期97-99,共3页
英语在中国的定位是外语而非第二语言,因此适合第二语言学习者的教学法不一定对中国大学非英语专业学生同样有效,我们在英语写作教学法的选择上也应考虑到这一点。就其实用性和有效性而言,"结果法"在中国大学非英语专业学生... 英语在中国的定位是外语而非第二语言,因此适合第二语言学习者的教学法不一定对中国大学非英语专业学生同样有效,我们在英语写作教学法的选择上也应考虑到这一点。就其实用性和有效性而言,"结果法"在中国大学非英语专业学生的英语写作教学中并未失去其重要地位。不仅如此,"结果法"还特别适应了当前大学英语教学改革寻求"费时较少,收效较高"的要求。 展开更多
关键词 结果法 外语 第二语言 大学英语写作教学
在线阅读 下载PDF
非英语专业大学生英语作文中的语篇错误——过程法与成果法的合理结合 被引量:1
2
作者 田英涛 张悦清 《兰州大学学报(社会科学版)》 CSSCI 北大核心 2009年第S1期124-129,共6页
介绍一项关于英语写作教学方法的实验,旨在比较"结果法"与"结合法"("结合法"即结果法与过程法有效结合)分别在减少中国非英语专业大学生英语写作中语篇错误方面的有效性。结果表明,对于中国非英语专业大... 介绍一项关于英语写作教学方法的实验,旨在比较"结果法"与"结合法"("结合法"即结果法与过程法有效结合)分别在减少中国非英语专业大学生英语写作中语篇错误方面的有效性。结果表明,对于中国非英语专业大学生而言,采用"结合法"比"结果法"更能有效地降低他们写作中的语篇错误,提高其英语写作水平。 展开更多
关键词 结合 结果法 过程 语篇错误 大学非英语专业写作教学 大学英语教学
在线阅读 下载PDF
权益工具与债务工具的区分方法解析——基于FASB提出的三种方法 被引量:2
3
作者 孙永尧 《财会月刊》 北大核心 2018年第4期125-136,共12页
美国财务会计准则委员会提出了三种关于权益工具与债务工具的区分方法。方法一:基础所有者法。该方法创新了基础金融工具的概念,并以此作为区分权益工具与债务工具的根本标准。凡是符合基础金融工具定义的都划分为权益工具,否则划分为... 美国财务会计准则委员会提出了三种关于权益工具与债务工具的区分方法。方法一:基础所有者法。该方法创新了基础金融工具的概念,并以此作为区分权益工具与债务工具的根本标准。凡是符合基础金融工具定义的都划分为权益工具,否则划分为非权益工具。基础所有者工具以资产要求权来区分主体金融工具的权利层次,凡是属于最低级要求权及最大多数权利的就是基础所有者工具,否则就不是基础所有者工具。方法二:所有者结算法。该方法将在基础所有者工具概念基础上与基础所有者工具报酬挂钩且同方向变动的,最终需用基础所有者工具报酬来结算的间接所有者工具划分为权益工具,其他都划分为金融资产或负债。方法三:重估预期结果法。该方法根据金融工具持有者的报酬与基础所有者工具的价格相关程度来决定金融工具的分类:凡是该金融工具及其组成部分的公允价值与基础所有者工具的公允价值同向变化的,作为权益工具;反向变化的,作为非权益工具。 展开更多
关键词 权益工具 债务工具 基础所有者 所有者结算 重估预期结果法
在线阅读 下载PDF
城市轨道交通企业采购员岗位绩效考核研究
4
作者 陆俊怡 《城市轨道交通研究》 北大核心 2024年第S01期32-36,共5页
[目的]为了设计更为全面的采购员岗位管理体系,帮助采购员提高工作效率的同时,也能让管理者更好地去考核和管理采购部门。[方法]以上海地铁维护保障有限公司物资和后勤分公司贸易管理部10名采购员2022年的采购数据为例,利用KPI(关键绩... [目的]为了设计更为全面的采购员岗位管理体系,帮助采购员提高工作效率的同时,也能让管理者更好地去考核和管理采购部门。[方法]以上海地铁维护保障有限公司物资和后勤分公司贸易管理部10名采购员2022年的采购数据为例,利用KPI(关键绩效指标法)确立了与采购相关的5个考核指标,计算得出相应的KPI绩效得分,并用AHP(层次分析法)确定了这5个采购指标的权重值;利用OKR(目标与关键结果法)确立了3个关键结果考核指标,其得分作为采购员绩效考核附加分。将KPI绩效考核得分和OKR绩效考核得分两部分相加得到10名采购员2022年的采购绩效考核总得分。[结果及结论]采用所提出的考核方法对采购员的采购绩效进行考核,并按照得分依次排序,能够区别出不同采购员间的差异。采用所提出的考核方法,既有助于提升采购员的协调能力、需求预估能力和议价谈判能力,也有助于提升采购员的战略寻源能力。 展开更多
关键词 城市轨道交通 采购员 岗位绩效考核 关键绩效指标 目标与关键结果法
在线阅读 下载PDF
中央国家机关内部审计机构胜任能力实证研究——基于中国内审协会2010年的调查数据 被引量:7
5
作者 屈耀辉 时现 《审计与经济研究》 CSSCI 北大核心 2012年第4期36-46,共11页
在理论分析和数据处理的基础上,使用中国内审协会2010年的调查数据,借助主成分分析法,从素质能力和业绩结果两个方面对32家中央国家机关内部审计机构的胜任能力进行评估,结果显示,两种思路评估出来的结果差异很大,分析后发现,最可能的... 在理论分析和数据处理的基础上,使用中国内审协会2010年的调查数据,借助主成分分析法,从素质能力和业绩结果两个方面对32家中央国家机关内部审计机构的胜任能力进行评估,结果显示,两种思路评估出来的结果差异很大,分析后发现,最可能的原因是两种评估思路的不同倾向性特点所致。进一步的影响因素分析显示,对素质能力法评估值有显著影响的因素远多于对业绩结果法评估值有显著影响的因素。 展开更多
关键词 审计机关内部审计机构 审计人员胜任能力 素质能力 业绩结果法 内部审计职业胜任能力
在线阅读 下载PDF
Design and dynamic simulation of hydraulic system of a new automatic transmission 被引量:15
6
作者 王书翰 徐向阳 +3 位作者 刘艳芳 戴振坤 TEN BERGE P 曲巍 《Journal of Central South University》 SCIE EI CAS 2009年第4期697-701,共5页
A new hydraulic system of a novel automatic transmission (AT) was designed. The dimension and structure of valves and cylinders were designed by theoretical calculation. The dynamic simulation model of hydraulic syste... A new hydraulic system of a novel automatic transmission (AT) was designed. The dimension and structure of valves and cylinders were designed by theoretical calculation. The dynamic simulation model of hydraulic system of AT was established by ITI-SimulationX. Simulation results and theoretical design results were compared to confirm the simulation model. Based on the confirmed simulation model, the simulation results of pressure and flow of the hydraulic system were analyzed. The dynamic simulation method is very helpful for designing and analyzing the performance of hydraulic system and further optimization design. The theoretical design method and dynamic simulation model are feasible for the real industrial applications. The research results can be used in hydraulic system design and optimization. 展开更多
关键词 automatic transmission hydraulic system dynamic simulation
在线阅读 下载PDF
怎样使新栽枣树当年结果
7
作者 孙世正 隋召峰 荆显敏 《河北果树》 1995年第3期47-47,共1页
怎样使新栽枣树当年结果欲使新栽枣树当年结果,根据多年生产实践体会应抓好以下措施。一、选适宜品种:枣树品种多达700多个,其结果能力和早果性能各不相同。要选择早果能力强的品种,以梨枣、金丝小枣新3号、大瓜枣、大白铃和棉... 怎样使新栽枣树当年结果欲使新栽枣树当年结果,根据多年生产实践体会应抓好以下措施。一、选适宜品种:枣树品种多达700多个,其结果能力和早果性能各不相同。要选择早果能力强的品种,以梨枣、金丝小枣新3号、大瓜枣、大白铃和棉枣为最好。二、栽健壮苗木:枣树是当... 展开更多
关键词 枣树 当年结果法 选种 壮苗培育 夏季 整枝修剪 保果激素
全文增补中
An accelerated scheme with high quality mesh based on Lloyd iteration 被引量:1
8
作者 秦衡峰 王艺 +1 位作者 李明富 周后明 《Journal of Central South University》 SCIE EI CAS 2012年第10期2797-2802,共6页
High quality mesh plays an important role for finite element methods in science computation and numerical simulation.Whether the mesh quality is good or not,to some extent,it determines the calculation results of the ... High quality mesh plays an important role for finite element methods in science computation and numerical simulation.Whether the mesh quality is good or not,to some extent,it determines the calculation results of the accuracy and efficiency.Different from classic Lloyd iteration algorithm which is convergent slowly,a novel accelerated scheme was presented,which consists of two core parts:mesh points replacement and local edges Delaunay swapping.By using it,almost all the equilateral triangular meshes can be generated based on centroidal Voronoi tessellation(CVT).Numerical tests show that it is significantly effective with time consuming decreasing by 40%.Compared with other two types of regular mesh generation methods,CVT mesh demonstrates that higher geometric average quality increases over 0.99. 展开更多
关键词 Lloyd iteration mesh generation Delaunay triangulation high quality mesh centroidal Voronoi tessellation
在线阅读 下载PDF
Mobile robot path planning based on adaptive bacterial foraging algorithm 被引量:8
9
作者 梁晓丹 李亮玉 +1 位作者 武继刚 陈瀚宁 《Journal of Central South University》 SCIE EI CAS 2013年第12期3391-3400,共10页
The utilization of biomimicry of bacterial foraging strategy was considered to develop an adaptive control strategy for mobile robot, and a bacterial foraging approach was proposed for robot path planning. In the prop... The utilization of biomimicry of bacterial foraging strategy was considered to develop an adaptive control strategy for mobile robot, and a bacterial foraging approach was proposed for robot path planning. In the proposed model, robot that mimics the behavior of bacteria is able to determine an optimal collision-free path between a start and a target point in the environment surrounded by obstacles. In the simulation, two test scenarios of static environment with different number obstacles were adopted to evaluate the performance of the proposed method. Simulation results show that the robot which reflects the bacterial foraging behavior can adapt to complex environments in the planned trajectories with both satisfactory accuracy and stability. 展开更多
关键词 robot path planning bacterial foraging behaviors swarm intelligence ADAPTATION
在线阅读 下载PDF
A strength reduction method based on double reduction parameters and its application 被引量:44
10
作者 袁维 白冰 +1 位作者 李小春 汪海滨 《Journal of Central South University》 SCIE EI CAS 2013年第9期2555-2562,共8页
In the traditional strength reduction method,the cohesion and the friction angle adopt the same reduction parameter,resulting in equivalent proportional reduction.This method does not consider the different effects of... In the traditional strength reduction method,the cohesion and the friction angle adopt the same reduction parameter,resulting in equivalent proportional reduction.This method does not consider the different effects of the cohesion and friction angle on the stability of the same slope and is defective to some extent.Regarding this defect,a strength reduction method based on double reduction parameters,which adopts different reduction parameters,is proposed.The core of the double-parameter reduction method is the matching reduction principle of the slope with different angles.This principle is represented by the ratio of the reduction parameter of the cohesion to that of the friction angle,described as η.With the increase in the slopeangle,ηincreases; in particular,when the slope angle is 45°,tηis 1.0.Through the matching reduction principle,different safety margin factors can be calculated for the cohesion and friction angle.In combination with these two safety margin factors,a formula for calculating the overall safety factor of the slope is proposed,reflecting the different contributions of the cohesion and friction angle to the slope stability.Finally,it is shown that the strength reduction method based on double reduction parameters acquires a larger safety factor than the classic limit equilibrium method,but the calculation results are very close to those obtained by the limit equilibrium method. 展开更多
关键词 double reduction parameter strength reduction method matching reduction principle slope stability
在线阅读 下载PDF
Combining supervised classifiers with unlabeled data
11
作者 刘雪艳 张雪英 +1 位作者 李凤莲 黄丽霞 《Journal of Central South University》 SCIE EI CAS CSCD 2016年第5期1176-1182,共7页
Ensemble learning is a wildly concerned issue.Traditional ensemble techniques are always adopted to seek better results with labeled data and base classifiers.They fail to address the ensemble task where only unlabele... Ensemble learning is a wildly concerned issue.Traditional ensemble techniques are always adopted to seek better results with labeled data and base classifiers.They fail to address the ensemble task where only unlabeled data are available.A label propagation based ensemble(LPBE) approach is proposed to further combine base classification results with unlabeled data.First,a graph is constructed by taking unlabeled data as vertexes,and the weights in the graph are calculated by correntropy function.Average prediction results are gained from base classifiers,and then propagated under a regularization framework and adaptively enhanced over the graph.The proposed approach is further enriched when small labeled data are available.The proposed algorithms are evaluated on several UCI benchmark data sets.Results of simulations show that the proposed algorithms achieve satisfactory performance compared with existing ensemble methods. 展开更多
关键词 correntropy unlabeled data regularization framework ensemble learning
在线阅读 下载PDF
Establishment and application of service mapping model for proactive remanufacturing impeller 被引量:2
12
作者 宋守许 邰莹莹 柯庆镝 《Journal of Central South University》 SCIE EI CAS CSCD 2016年第12期3143-3152,共10页
Since the complex impeller structure and the difficult remanufacturing process may easily cause advance remanufacturing or excessive use,an optimized design method of impeller and service mapping model was presented f... Since the complex impeller structure and the difficult remanufacturing process may easily cause advance remanufacturing or excessive use,an optimized design method of impeller and service mapping model was presented for its proactive remanufacturing with setting up to explore the best remanufacturing time point in this work.Considering a certain model of long distance pipeline compressor impeller with the Basquin equation and the design method of impeller,the mathematical relationship between the changes of structure and life of the impeller was established.And the service mapping model between the structure and life was set up and simulated by ANSYS software.Thus,the service mapping model was applied to feedback the original design for proactive remanufacturing.In this work,the best proactive remanufacturing time point of impeller was analyzed with the service mapping model,and the structural parameter values could be optimized at this time point.Meanwhile,in the results of this simulation,it proves that the impeller under this optimization performance could satisfy the impeller operating demands.Therefore,comparing with the traditional optimization design method,the remanufacturing optimized design based on the service mapping model is feasible in proactive remanufacturing for sustainable development. 展开更多
关键词 IMPELLER proactive remanufacturing remanufacturing time point service mapping model
在线阅读 下载PDF
A multiple watermarks algorithm for image content authentication
13
作者 蔡立军 李睿 易叶青 《Journal of Central South University》 SCIE EI CAS 2012年第10期2866-2874,共9页
A novel multiple watermarks cooperative authentication algorithm was presented for image contents authentication.This algorithm is able to extract multiple features from the image wavelet domain,which is based on that... A novel multiple watermarks cooperative authentication algorithm was presented for image contents authentication.This algorithm is able to extract multiple features from the image wavelet domain,which is based on that the t watermarks are generated.Moreover,a new watermark embedding method,using the space geometric model,was proposed,in order to effectively tackle with the mutual influences problem among t watermarks.Specifically,the incidental tampering location,the classification of intentional content tampering and the incidental modification can be achieved via mutual cooperation of the t watermarks.Both the theoretical analysis and simulations results validate the feasibility and efficacy of the proposed algorithm. 展开更多
关键词 multiple watermarks cooperation authentication wavelet transform image wavelet domain intentional contenttampering incidental modification
在线阅读 下载PDF
Calculations of stability of alloyed cementite from valance electron structure 被引量:1
14
作者 王红军 刘宏玉 +4 位作者 刘礼 曾晓宇 卢建夺 林冲 徐红兵 《Journal of Central South University》 SCIE EI CAS CSCD 2017年第2期259-269,共11页
Based on the empirical electronic theory of solids and molecules (EET), the actual model for unit cell of cementite (0-FeaC) was built and the valence electron structures (VES) of cementite with specified site a... Based on the empirical electronic theory of solids and molecules (EET), the actual model for unit cell of cementite (0-FeaC) was built and the valence electron structures (VES) of cementite with specified site and a number of Fe atoms substituted by alloying atoms of M ( M=Cr, V, W, Mo, Mn ) were computed by statistical method. By defining P as the stability factor, the stability of alloyed cementite with different numbers and sites of Fe atoms substituted by M was calculated. Calculation results show that the density of lattice electrons, the symmetry of distribution of covalent electron pairs and bond energy have huge influence on the stability of alloyed cementite. It is more stable as M substitutes for FeE than for Fe1. The alloyed cementite is the most stable when Cr, Mo, W and V substitute for 2 atoms of Fe2 at the sites of Nos. 2 and 3 (or No. 6 and No. 7). The stability of alloyed cementite decreases gradually as being substitutional doped by W, Cr, V, Mo and Mn. 展开更多
关键词 valence electron structure alloyed cementite stability density of lattice electrons symmetry of bonds bond energy
在线阅读 下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部