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Consensus Control With a Constant Gain for Discrete-time Binary-valued Multi-agent Systems Based on a Projected Empirical Measure Method 预览
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作者 Ting Wang Min Hu Yanlong Zhao 《自动化学报:英文版》 CSCD 2019年第4期1052-1059,共8页
This paper studies the consensus control of multiagent systems with binary-valued observations.An algorithm alternating estimation and control is proposed.Each agent estimates the states of its neighbors based on a pr... This paper studies the consensus control of multiagent systems with binary-valued observations.An algorithm alternating estimation and control is proposed.Each agent estimates the states of its neighbors based on a projected empirical measure method for a holding time.Based on the estimates,each agent designs the consensus control with a constant gain at some skipping time.The states of the system are updated by the designed control,and the estimation and control design will be repeated.For the estimation,the projected empirical measure method is proposed for the binary-valued observations.The algorithm can ensure the uniform boundedness of the estimates and the mean square error of the estimation is proved to be at the order of the reciprocal of the holding time(the same order as that in the case of accurate outputs).For the consensus control,a constant gain is designed instead of the stochastic approximation based gain in the existing literature for binary-valued observations.And,there is no need to make modification for control since the uniform boundedness of the estimates ensures the uniform boundedness of the agents’states.Finally,the systems updated by the designed control are proved to achieve consensus and the consensus speed is faster than that in the existing literature.Simulations are given to demonstrate the theoretical results. 展开更多
关键词 Binary-valued observations CONSENSUS CONTROL CONSTANT GAIN convergence rate multi-agent systems projected empirical measure method
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Identification of the anomaly component using BEMD combined with PCA from element concentrations in the Tengchong tin belt,SW China 预览
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作者 Yongqing Chen Lina Zhang Binbin Zhao 《地学前缘:英文版》 CAS CSCD 2019年第4期1561-1576,共16页
Concentration of elements or element groups in a geological body is the result of multiple stages of rockforming and ore-forming geological processes.An ore-forming element group can be identified by PCA(principal com... Concentration of elements or element groups in a geological body is the result of multiple stages of rockforming and ore-forming geological processes.An ore-forming element group can be identified by PCA(principal component analysis)and be separated into two components using BEMD(bi-dimensional empirical mode decomposition):(1)a high background component which represents the ore-forming background developed in rocks through various geological processes favorable for mineralization(i.e.magmatism,sedimentation and/or metamorphism);(2)the anomaly component which reflects the oreforming anomaly that is overprinted on the high background component developed during mineralization.Anomaly components are used to identify ore-finding targets more effectively than ore-forming element groups.Three steps of data analytical procedures are described in this paper;firstly,the application of PCA to establish the ore-forming element group;secondly,using BEMD on the o re-forming element group to identify the anomaly components created by different types of mineralization processes;and finally,identifying ore-finding targets based on the anomaly components.This method is applied to the Tengchong tin-polymetallic belt to delineate ore-finding targets,where four targets for Sn(W)and three targets for Pb-Zn-Ag-Fe polymetallic mineralization are identified and defined as new areas for further prospecting.It is shown that BEMD combined with PCA can be applied not only in extracting the anomaly component for delineating the ore-finding target,but also in extracting the residual component for identifying its high background zone favorable for mineralization from its oreforming element group. 展开更多
关键词 Bi-dimensional empirical mode decomposition(BEMD) Principal COMPONENT analysis(PCA) ANOMALY components ORE-FORMING ELEMENT groups Sn(W)and Pb-Zn-Ag-Fe POLYMETALLIC deposits Tengchong tin-polymetallic BELT
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An improved empirical green function method to extract microseismic signals
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作者 Dayong Yu Pan Wang 《大地测量与地球动力学:英文版》 2019年第1期42-48,共7页
In mining, reservoir impoundment and hydraulic fracturing exploitation, the induced microseismic clusters may present complex waveforms at receivers since the individual events generally arrive very close. And the rou... In mining, reservoir impoundment and hydraulic fracturing exploitation, the induced microseismic clusters may present complex waveforms at receivers since the individual events generally arrive very close. And the routine methods for arrival picking are insufficiently efficient due to these strong influences. Here, we modified the empirical green function method and applied it to extract the green functions and the radiation coefficients of microseismic events with the largest energy in clusters.Multiple-channel records were used to estimate an 'average' source spectrum and then the 'average' source wavelet was removed from the records by deconvolution. We applied this method to the real data,and the result indicated clear improvement in extracting the dominant event of the clusters. 展开更多
关键词 Microseismic SIGNALS Empirical green FUNCTION SOURCE SPECTRA
Study on Mature Age of Individual Larix kaempferi 预览
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作者 Keqin LI Lingling LI +3 位作者 Fengzhen WANG Dequan ZHANG Dongmei YUE Keqing FANG 《农业生物技术:英文版》 CAS 2019年第3期138-140,共3页
Based on the study of parse wood materials,the fitting empirical equation of tree growth was obtained,a function with tree growth as a variable and time as an independent variable.Through mathematical operations such ... Based on the study of parse wood materials,the fitting empirical equation of tree growth was obtained,a function with tree growth as a variable and time as an independent variable.Through mathematical operations such as function derivation,the mature age of tree growth was obtained,and the obtained expected mature age for Larix kaempferi was 46 years.And the application,research directions and precautions of the mature ages were proposed. 展开更多
关键词 MATURE age Empirical EQUATION PARSE WOOD
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Study on Expected Mature Age of Individual Saliz matsudana 预览
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作者 Lingling LI Keqin LI +3 位作者 Jing ZHANG Dequan ZHANG Zhijun YANG Hongbo QIAO 《农业生物技术:英文版》 CAS 2019年第3期150-152,共3页
Based on the study of parse wood materials,the fitting empirical equation of tree growth was obtained,a function with tree growth as a variable and time as an independent variable.Through mathematical operations such ... Based on the study of parse wood materials,the fitting empirical equation of tree growth was obtained,a function with tree growth as a variable and time as an independent variable.Through mathematical operations such as function derivation,the mature age of tree growth was obtained,and the obtained expected mature age of Saliz matsudana was 21a.And the application,research directions and precautions of the mature ages were proposed. 展开更多
关键词 MATURE age Empirical EQUATION PARSE WOOD
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我国认罪认罚从宽制度之审视与修正——以C市八家试点法院为研究样本 预览
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作者 张川 李国华 《湖北工程学院学报》 2019年第4期83-89,共7页
认罪认罚从宽制度具有目标价值、基础价值和关怀价值等三重价值。认罪认罚从宽制度的初步成效表现为案件审理时间缩短、被告人服判息诉率提髙。在司法方面,适用认罪认罚从宽处理程序的案件分布不均,主要集中在基层人民法院,案由分布悬殊... 认罪认罚从宽制度具有目标价值、基础价值和关怀价值等三重价值。认罪认罚从宽制度的初步成效表现为案件审理时间缩短、被告人服判息诉率提髙。在司法方面,适用认罪认罚从宽处理程序的案件分布不均,主要集中在基层人民法院,案由分布悬殊,涉及的罪名和判处的刑罚相对集中,缓刑适用率高以及控辩两造对抗弱化,量刑建议采纳率高。与此同时,认罪认罚从宽案件也存在程序运行紊乱、适用范围宽泛、审查方式不统一、量刑标准不完整以及被告人权利保障缺位的瑕疵。据此,应疏通程序流转、统一司法适用,并辅之以相应的配套机制,对认罪认罚从宽制度作进一步完善。 展开更多
关键词 认罪认罚从宽 司法改革 试点 实证
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民族地区互联网金融组合模型建构及实证研究
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作者 马瑜 《贵州民族研究》 CSSCI 北大核心 2019年第3期135-139,共5页
促进民族地区互联网金融的发展,不仅有助于加快我国民族地区经济建设,而且为我国民族地区实现普惠金融开辟了崭新的路径。在民族地区互联网金融发展的同时,应该意识到,无论是传统的金融行业还是互联网金融,风险的控制永远是核心。在对... 促进民族地区互联网金融的发展,不仅有助于加快我国民族地区经济建设,而且为我国民族地区实现普惠金融开辟了崭新的路径。在民族地区互联网金融发展的同时,应该意识到,无论是传统的金融行业还是互联网金融,风险的控制永远是核心。在对民族地区互联网金融发展现状及必要性研究的基础上,论文阐述了民族地区互联网金融组合模型的建构步骤,并以网络信贷用户行为的研究为例,进行了基于风险控制的民族地区互联网金融组合模型的建构和实证分析。 展开更多
关键词 互联网金融 模型建构 实证 民族地区
Empirical models and design codes in prediction of modulus of elasticity of concrete
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作者 Behnam VAKHSHOURI Shami NEJADI 《结构与土木工程前沿:英文版》 EI CSCD 2019年第1期38-48,共11页
Modulus of Elasticity (MOE)is a key parameter in reinforced concrete design.It represents the stressstrain relationship in the elastic range and is used in the prediction of concrete structures.Out of range estimation... Modulus of Elasticity (MOE)is a key parameter in reinforced concrete design.It represents the stressstrain relationship in the elastic range and is used in the prediction of concrete structures.Out of range estimation of MOE in the existing codes of practice strongly affect the design and performance of the concrete structures.This study includes: (a)evaluation and comparison of the existing analytical models to estimating the MOE in normal strength concrete,and (b)proposing and verifying a new model.In addition,a wide range of experimental databases and empirical models to estimate the MOE from compressive strength and density of concrete are evaluated to verification of the proposed model. The results show underestimation of MOE of conventional concrete in majority of the existing models.Also,considering the consistency between density and mechanical properties of concrete,the predicted MOE in the models including density effect,are more compatible with the experimental results. 展开更多
关键词 MODULUS of ELASTICITY NORMAL STRENGTH NORMAL weight CONCRETE empirical models design codes COMPRESSIVE STRENGTH density
How security bugs are fixed and what can be improved:an empirical study with Mozilla
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作者 Xiaobing SUN Xin PENG +2 位作者 Kai ZHANG Yang LIU Yuanfang CAI 《中国科学:信息科学(英文版)》 SCIE EI CSCD 2019年第1期210-212,共3页
Dear editor,A bug is regarded as security related when it creates vulnerability in the software,which the malicious attackers could exploit to attack the system [1].Security bugs widely exist in released software,and ... Dear editor,A bug is regarded as security related when it creates vulnerability in the software,which the malicious attackers could exploit to attack the system [1].Security bugs widely exist in released software,and are serious threats to organizations,which can cause serious monetary loss and reputation damage.Therefore,addressing security bugs is a top priority in software maintenance [1]. 展开更多
关键词 SECURITY bugs empirical
An Empirical Study of Host Social Media on the Intercultural Adaptation of Preparatory International Students in China: A Case Study of Shandong University 预览
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作者 XIE Na 《文化与宗教研究:英文版》 2019年第2期99-109,共11页
This thesis probes into the current situation of host social media usage and intercultural adaptation of preparatory international students in China. Study covered 208 preparatory international students in total was c... This thesis probes into the current situation of host social media usage and intercultural adaptation of preparatory international students in China. Study covered 208 preparatory international students in total was conducted, with subject observation, structured interview, and questionnaire, in Shandong University, which is considered as one of the most representative institutions providing high-level preparatory education for international students in China. Field data collected were analyzed descriptively in the form of frequencies, tables, and percentages. Taken all that have been analyzed in this thesis, findings strongly suggest that the main factors influencing international students’ intercultural adaptability include host social media usage, intercultural experience, mandarin level, and cultural distance. Results also indicate significant correlation between host social media usage and intercultural adaptation: students who frequently use host social media to chat with Chinese perform better at intercultural adaptation;those who are more dependent and satisfied with host social media are more adaptive as well, the same goes to students who use host social media more frequently to get information or socialize. Consequently, this study suggests necessary promotion of host social media for international students in China. 展开更多
关键词 PREPARATORY international students HOST SOCIAL media INTERCULTURAL ADAPTATION empirical study
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Linkage Between Winter Temperatures in the Yellow Sea and Atmospheric Circulation Indices 预览
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作者 YUAN Chengyi WEI Hao +1 位作者 LUO Xiaofan KUANG Xiaodi 《中国海洋大学学报:英文版》 SCIE CAS CSCD 2019年第2期261-270,共10页
This study investigated the linkage between winter temperature in the Yellow Sea (YS), China, and atmospheric indices and established this linkage through statistical models. The water temperature was obtained through... This study investigated the linkage between winter temperature in the Yellow Sea (YS), China, and atmospheric indices and established this linkage through statistical models. The water temperature was obtained through hindcast simulation using a global–regional nested ocean model for the period of 1958–2007. The interannual variations of the simulated temperature were validated using satellite and in-situ observations. In the YS, the winter sea surface temperature (SST) had obvious interannual variations, with the maximum SST exceeding 2℃, and a significant shift from the cold to warm phase during 1988–1989. Based on the mechanism study, statistical models for the variations of water temperature in the YS were established using suitable atmospheric indices as predictors. For the northern YS (NYS) and the coastal region of the southern YS (SYS), statistical models of SST were established using linear regression based on the December–January–February mean Arctic oscillation index (AOI), representing the dominant large-scale atmospheric variability in boreal winter. For the YS warm current (YSWC) region, statistical models were established using both the AOI and the first principal component of the local wind stress curl (PC1-Curl), derived from the empirical orthogonal functions analysis. The PC1-Curl represents the influence of the local wind stress curl on the west-to-east shifts of the YSWC pathway. The applications proved that the models presented in this study have the ability to estimate winter temperatures in the YS within the recent years. 展开更多
关键词 water temperature statistical model INTERANNUAL VARIATIONS atmospheric VARIABILITY empirical ORTHOGONAL function analysis
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安徽省大学生参与体育保险意愿影响因素的实证分析——基于Logistic回归模型 预览
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作者 孙强 《哈尔滨体育学院学报》 2019年第3期47-51,共5页
为促进体育保险在高校中的实施与普及,从大学生个体出发,采用专家访谈法、问卷调查法和数理统计法,实证分析了安徽省大学生参与体育保险的意愿及其影响因素。结果显示:体育教师全程注意义务判断、希望自身健康程度(包括身体形态更美、... 为促进体育保险在高校中的实施与普及,从大学生个体出发,采用专家访谈法、问卷调查法和数理统计法,实证分析了安徽省大学生参与体育保险的意愿及其影响因素。结果显示:体育教师全程注意义务判断、希望自身健康程度(包括身体形态更美、运动能力更强)、体育保险对运动伤害作用认知、开展预防保障知识必要性的认知、设立体育保险必要性认知、投保金额预期对大学生投保体育保险的意愿影响显著;其中,体育保险对运动伤害作用认知、设立体育保险必要性认知、投保金额预期在0.01水平上显著。据此,提出高校发展体育保险的相应建议。 展开更多
关键词 高校 体育保险 影响因素 实证 LOGISTIC回归模型
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Comparison of artificial neural networks with empirical correlations for estimating the average cycle time in conical spouted beds
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作者 I. Estiatia M. Tellabidea +4 位作者 J.F. Saldarriaga H. Altzibara F.B. Freirec J.T. Freirec M. Olazara 《中国颗粒学报:英文版》 SCIE EI CAS CSCD 2019年第1期48-57,共10页
Conventional spouted beds have been extensively used in many real-life applications but are not suited for all types of materials, especially fine particles, which require internal devices to improve their motion in t... Conventional spouted beds have been extensively used in many real-life applications but are not suited for all types of materials, especially fine particles, which require internal devices to improve their motion in the spouted bed. However, unlike conventional spouted beds, there are almost no mechanistic or empirical models available for the design of spouted beds with internals. Given the availability of an extensive but not experimentally designed database, the main purpose of this study is to present an analysis of neural networks and empirical models in terms of their suitability to fit and predict average cycle times in conical spouted beds with and without draft tubes. The parameters investigated are particle size, density, contactor angle, gas inlet diameter, static bed height, and draft tube features. Although the amount of information is always a key factor when fitting models, the size of the database used in this study strongly affects the fitting performance of empirical models, whereas artificial neural networks are more influenced by how the data are scaled. Results of model verification show that both techniques are suitable for predicting average cycle times for data outside the range covered by the database. 展开更多
关键词 Empirical correlation Artificial NEURAL network AVERAGE CYCLE time Conical spouted BED Draft tubes Modeling
Parametric study of single confined fragment launch explosive device 预览
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作者 Pankaj K.Choudha A.Kumaraswamy Kusumkant D.Dhote 《Defence Technology(防务技术)》 CAS CSCD 2019年第2期179-185,共7页
In this article,parametric study of single confined fragment launch device was carried out.The configuration proposed was further studied to derive the empirical relationship for effect of fragment size,charge size,co... In this article,parametric study of single confined fragment launch device was carried out.The configuration proposed was further studied to derive the empirical relationship for effect of fragment size,charge size,confinement thickness on fragment velocity.The simulations were carried out using ANSYSAUTODYNE explicit solver.Fragment velocities were estimated as a function of different parametric combinations of explosive quantities,charge length to diameter ratio,fragment height to diameter ratio,confinement thickness,fragment material and fragment mass.The data was further converted to charge to metal ratio under fragment and confinement.It was observed that,increase in confinement thickness,charge quantity and decrease in fragment height increases the fragment velocity.It is also noted that,charge to metal mass ratio under fragment significantly affects the fragment velocity.At the end,an empirical relationship for fragment velocity interms of all these parameters was established.Using these relations,two velocities 1831.92 m/s and 2523.9 m/s required for NATO STANAG 4496 IM test were estimated.The design parameters for these velocities are presented.Also,the results estimated using the empirical relationship has been compared with published experimental data.Error in the predicted velocities is within the acceptable range.The empirical relationship proposed will be useful for finalization of design of the fragment launch device. 展开更多
关键词 CONFINEMENT FRAGMENT size Empirical relationship FRAGMENT velocity Insensitive munition test FRAGMENT LAUNCHING DEVICE
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Empirical Likelihood Inference for Functional Coefficient ARCH-M Model
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作者 Hai Qing ZHAO Yuan LI Yan Meng ZHAO 《数学学报:英文版》 SCIE CSCD 2019年第2期270-296,共27页
Empirical likelihood inference for parametric and nonparametric parts in functional coefficient ARCH-M models is investigated in this paper. Firstly, the kernel smoothing technique is used to estimate coefficient func... Empirical likelihood inference for parametric and nonparametric parts in functional coefficient ARCH-M models is investigated in this paper. Firstly, the kernel smoothing technique is used to estimate coefficient function δ(x). In this way we obtain an estimated function with parameter β.Secondly, the empirical likelihood method is developed to estimate the parameter β. An estimated empirical log-likelohood ratio is proved to be asymptotically standard chi-squred, and the maximum empirical likelihood estimation(MELE) for β is shown to be asymptotically normal. Finally, based on the MELE of β, the empirical likelihood approach is again applied to reestimate the nonparametric part δ(x). The empirical log-likelohood ratio for δ(x) is proved to be also asymptotically standard chi-squred. Simulation study shows that the proposed method works better than the normal approximation method in terms of average areas of confidence regions for β, and the empirical likelihood confidence belt for δ(x) performs well. 展开更多
关键词 ARCH-M MODEL empirical LIKELIHOOD RELATIVE RISK AVERSION
Empirical investigation of stochastic local search for maximum satisfiability
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作者 Yi CHU Chuan LUO +1 位作者 Shaowei CAI Haihang YOU 《中国计算机科学前沿:英文版》 SCIE EI CSCD 2019年第1期86-98,共13页
The maximum satisfiability (MAX-SAT)problem is an important NP-hard problem in theory,and has a broad range of applications in practice.Stochastic local search (SLS)is becoming an increasingly popular method for solvi... The maximum satisfiability (MAX-SAT)problem is an important NP-hard problem in theory,and has a broad range of applications in practice.Stochastic local search (SLS)is becoming an increasingly popular method for solving MAX-SAT.Recently,a powerful SLS algorithm called CCLS shows efficiency on solving random and crafted MAX-SAT instances.However,the performance of CCLS on solving industrial MAX-SAT instances lags far behind.In this paper,we focus on experimentally analyzing the performance of SLS algorithms for solving industrial MAXSAT instances.First,we conduct experiments to analyze why CCLS performs poor on industrial instances.Then we propose a new strategy called additive BMS (Best from Multiple Selections)to ease the serious issue.By integrating CCLS and additive BMS,we develop a new SLS algorithm for MAXSAT called CCABMS,and related experiments indicate the efficiency of CCABMS.Also,we experimentally analyze the effectiveness of initialization methods on SLS algorithms for MAX-SAT,and combine an effective initialization method with CCABMS,resulting in an enhanced algorithm.Experimental results show that our enhanced algorithm performs better than its state-of-the-art SLS competitors on a large number of industrial MAX-SAT instances. 展开更多
关键词 empirical investigation STOCHASTIC local SEARCH MAXIMUM SATISFIABILITY industrial instances ADDITIVE BMS
Testing Serial Correlation in Partially Linear Additive Models
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作者 Jin YANG Chuan-hua WEI 《应用数学学报:英文版》 SCIE CSCD 2019年第2期401-411,共11页
As an extension of partially linear models and additive models, partially linear additive model is useful in statistical modelling. This paper proposes an empirical likelihood based approach for testing serial correla... As an extension of partially linear models and additive models, partially linear additive model is useful in statistical modelling. This paper proposes an empirical likelihood based approach for testing serial correlation in this semiparametric model. The proposed test method can test not only zero first-order serial correlation, but also higher-order serial correlation. Under the null hypothesis of no serial correlation, the test statistic is shown to follow asymptotically a chi-square distribution. Furthermore, a simulation study is conducted to illustrate the performance of the proposed method. 展开更多
关键词 PARTIALLY LINEAR additive model BACKFITTING Profile LEAST-SQUARES approach Empirical LIKELIHOOD SERIAL correlation
Estimation of leaf area index from high resolution ZY-3 satellite imagery in a catchment dominated by Larix principis-rupprechtii,northern China 预览
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作者 Tian Wang Fengfeng Kang +3 位作者 Hairong Han Xiaoqin Cheng Jiang Zhu Wensong Zhou 《林业研究:英文版》 CAS CSCD 2019年第2期603-615,共13页
Leaf area index(LAI)is a key factor that determines a forest ecosystem’s net primary production and energy exchange between the atmosphere and land surfaces.LAI can be measured in many ways,but there has been little ... Leaf area index(LAI)is a key factor that determines a forest ecosystem’s net primary production and energy exchange between the atmosphere and land surfaces.LAI can be measured in many ways,but there has been little research to compare LAI estimated by different methods.In this study,we compared the LAI results from two different approaches,i.e.,the dimidiate pixel model(DPM)and an empirical statistic model(ESM)using ZY-3 high-accuracy satellite images validated by field data.We explored the relationship of LAI of Larix principis-rupprechtii Mayr plantations with topographic conditions.The results show that DPM improves the simulation of LAI(r=0.86,RMSE=0.57)compared with ESM(r=0.62,RMSE=0.79).We further concluded that elevation and slope significantly affect the distribution of LAI.The maximum peak of LAI appeared at an aspect of east and southeast at an elevation of 1700–2000 m.Our results suggest that ZY-3 can satisfy the needs of quantitative monitoring of leaf area indices in small-scale catchment areas.DPM provides a simple and accurate method to obtain forest vegetation parameters in the case of non-ground measurement points. 展开更多
关键词 Dimidiate PIXEL model Empirical statistic Fractional VEGETATION cover LARIX principis-rupprechtii NDVI ZY-3
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Multiscale analysis of Asian Monsoon over the past 640 ka
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作者 Yalan ZENG Shitao CHEN +2 位作者 Shaohua YANG Yijia LIANG Yongjin WANG 《中国科学:地球科学英文版》 SCIE EI CAS CSCD 2019年第5期843-852,共10页
The empirical mode decomposition(EMD) method is used to re-analyse the high-resolution and precisely-dated stalagmite record from Chinese caves over the past 640 ka. Results show that(1) the variation in the Asian Mon... The empirical mode decomposition(EMD) method is used to re-analyse the high-resolution and precisely-dated stalagmite record from Chinese caves over the past 640 ka. Results show that(1) the variation in the Asian Monsoon can be completely decomposed into ten quasiperiod oscillations, among which the precession and semiprecession band oscillations are the most prominent periodicities, with contribution rates of 31.1% and 30.7%, respectively;(2) the cross-spectrum analysis of the semiprecession component and bi-hemisphere insolation(BHI) are strongly correlated, indicating an amplified response of precipitation and temperature variability to the interhemispheric insolation in the low-latitude regions, thus further affecting the intensity of the Asian Monsoon;(3) on millennial timescales, obvious oscillations at the 5 ka and 1–2 ka bands roughly correspond to the classical Bond and Dansgaard-Oeschger(DO) cycles. Additionally, a strong correlation is found between the detrended stalagmite δ^18O records and Ca/Sr sequence from the North Atlantic(especially at the 5 ka band). This result means that the 5 ka cycle is characteristic of the glacial-interglacial cycle since the middle and late Pleistocene and may imply that climate change on the millennial timescale is the result of an interaction between global ice volume and insolation. 展开更多
关键词 Empirical mode decomposition (EMD) Asian MONSOON Oxygen ISOTOPE RECORDS Semiprecession 5 KA cycle
农村公共文化服务实证研究——以青岛为例 预览
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作者 刘玉凤 廉永剑 《青岛农业大学学报:社会科学版》 2018年第2期15-18,51共5页
构建现代公共文化服务体系是保障人民群众基本文化权益的重要途径。近年来,中国加大了公共文化服务供给的力度,农村的公共文化服务效能得以提高。青岛市作为2011年获批的首批国家公共文化服务示范区,农村公共文化服务质量和效能大大提升... 构建现代公共文化服务体系是保障人民群众基本文化权益的重要途径。近年来,中国加大了公共文化服务供给的力度,农村的公共文化服务效能得以提高。青岛市作为2011年获批的首批国家公共文化服务示范区,农村公共文化服务质量和效能大大提升,加强对青岛市农村公共文化服务的研究对同类地区的公共文化服务具有示范意义。本文用实证的方法对青岛市农村公共文化服务的经验进行了总结,为对标城市的公共文化服务提供经典范例。 展开更多
关键词 农村 公共文化 实证
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