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互联网背景下远程教育中数字教材建设研究

辽宁高职学报 2024年第1期26卷 82-85,112页

作者：韩祥祚王筱淳盘锦职业技术学院辽宁盘锦124000 东宁市道河镇中心学校黑龙江东宁157299

教材是教育的重要载体,但纸质教材不能更好地服务于远程教育,作为传统教材的进化产物,数字教材应运而生,数字教材的推广是顺应信息时代学习方式更新和教学改革的必然趋势。如何建设数字教材、正确认识数字教材与纸质教材的关系、充分发... 详细信息

教材是教育的重要载体,但纸质教材不能更好地服务于远程教育,作为传统教材的进化产物,数字教材应运而生,数字教材的推广是顺应信息时代学习方式更新和教学改革的必然趋势。如何建设数字教材、正确认识数字教材与纸质教材的关系、充分发挥数字教材的价值、支撑教学质量的提升,是数字教材的根本任务。通过梳理远程教育教学交互的现状,提出优化策略,同时挖掘数字教材的内涵与优势,提出数字教材与远程教育有机融合后在应用中存在的问题及研究对策。

关键词：远程教育数字教材教学交互共建共享

Joint asymptotic distribution of exceedances point process and partial sum of stationary Gaussian sequence

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Applied Mathematics(A Journal of Chinese Universities) 2011年第3期26卷 319-326页

作者： TAN Zhong-quan PENG zuo-xiang Department of Mathematics Zunyi Normal College Zunyi 563002 China Department of Mathematics Soochow University Suzhou 215006 China School of Mathematics and Statistics Southwest University Chongqing 400715 China

Let {Xi}i=1^∞ be a standardized stationary Gaussian sequence with covariance function τ（n） =EX1Xn＋1, Sn =∑i=1^nXi,and X^-n=Sn/*** let Nn be the point process formed by the exceedances of random level （x/√2 log n＋√2 log n-log（4π log n）/2√log n） √1-τ（n）＋ X^-n by X1,X2,…, Xn. Under some mild conditions, Nn and Sn are asymptotically independent, and Nn converges weakly to a Poisson process on （0,1].

关键词： stationary Gaussian sequence exceedances point process partial sum.

Almost sure limit theorem for the maximum of a class of quasi-stationary sequences

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Applied Mathematics(A Journal of Chinese Universities) 2014年第1期29卷 44-52页

作者： ZHUANG Guang-ming PENG zuo-xiang School of Mathematical Sciences Liaocheng University School of Automation Nanjing University of Science and Technology School of Mathematics and Statistics Southwest University

This paper investigates the problem of almost sure limit theorem for the maximum of quasi-stationary sequence based on the result of Turkman and Walker. We prove an almost sure limit theorem for the maximum of a class of quasi-stationary sequence under weak dependence conditions of D （uk, un） and αtm,ln = 0 （（log log n）-（1＋ε））.

关键词： quasi-stationary sequence maximum limit distribution almost sure central limit theorem

Limit theorems for supremum of Gaussian processes over a random interval

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Applied Mathematics(A Journal of Chinese Universities) 2018年第3期33卷 335-343页

作者： LIN Fu-ming PENG zuo-xiang School of Statistics and Management Shanghai University of Finance and Economics School of Mathematics and Statistics Sichuan University of Science & Engineering School of Mathematics and Statistics Southwestern University

Let {X(t), t ≥ 0} be a centered stationary Gaussian process with correlation r(t)such that 1-r(t) is asymptotic to a regularly varying function. With T being a nonnegative random variable and independent of X(t), the... 详细信息

关键词： stationary Gaussian process supremum of a process regularly varying functions random intervals

现代绿色储粮新技术的研究现状——以武汉国家稻米交易中心有限公司为例

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粮油食品科技 2024年第5期32卷 19-25页

作者：左祥莉马文斌张汉宜朱治国曾仕林王翔刘齐湖北大学知行学院湖北武汉430011 武汉国家稻米交易中心有限公司湖北武汉431400

为加快建设绿色安全的智慧粮库,提高管理现代化水平,在科技赋能,大力发展新质生产力的背景下,绿色储粮技术迎来了新的发展。综述了武汉国家稻米交易中心有限公司集成应用的3项新型控温技术(光伏离网供电空调系统、粮仓垂直热皮层定向控... 详细信息

为加快建设绿色安全的智慧粮库,提高管理现代化水平,在科技赋能,大力发展新质生产力的背景下,绿色储粮技术迎来了新的发展。综述了武汉国家稻米交易中心有限公司集成应用的3项新型控温技术(光伏离网供电空调系统、粮仓垂直热皮层定向控温、零耗能辐射制冷控温)和3项新型防虫杀虫技术(多杀霉素、S-烯虫酯、食品级惰性粉,评价了其应用效果,并建议以仓房的隔热保冷等准低温仓改造措施为基础,以空调控温或气调储藏等为主要手段,综合运用上述新技术,以达到准低温储粮、免熏蒸储粮、智慧储粮的要求,以期为粮食仓储企业开展绿色储粮新技术的应用研究提供相关参考。

关键词：粮食仓储绿色储粮控温技术防虫杀虫

Distributional expansion of maximum from logarithmic general error distribution

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Applied Mathematics(A Journal of Chinese Universities) 2016年第2期31卷 157-164页

作者： YANG Geng LIAO Xin PENG zuo-xiang School of Mathematics and Statistics Southwest University Business School University of Shanghai for Science and Technology

Logarithmic general error distribution is an extension of lognormal distribution. In this paper, with optimal norming constants the higher-order expansion of distribution of partial maximum of logarithmic general erro... 详细信息

关键词： Extreme value distribution Higher-order expansion Logarithmic general error distribution,Maximum

Second-order Asymptotics on Distributions of Maxima of Bivariate Elliptical Arrays

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Acta Mathematica Sinica,English Series 2018年第7期34卷 1159-1178页

作者： Xin LIAO Zhi Chao WENG zuo xiang PENG Business School University of Shanghai for Science and Technology Shanghai 200093 P. R. China School of Economics and Management Fuzhou University Fujian 350116 P. R. China School of Mathematics and Statistics Southwest University Chongqing 400715 P. R. China

Let {（ξni, ηni）, 1 ≤ i ≤ n, n ≥ 1} be a triangular array of independent bivariate elliptical random vectors with the same distribution function as （S1,ρnS1 ＋ √1- ρ2nS2）, ρn ∈（0, 1）, where （S1,S2） is a bivariate spherical random vector. For the distribution function of radius√S12 ＋ S22 belonging to the max-domain of attraction of the Weibull distribution, the limiting distribution of maximum of this triangular array is known as the convergence rate of p~ to 1 is given. In this paper, under the refinement of the rate of convergence of p~ to 1 and the second-order regular variation of the distributional tail of radius, precise second-order distributional expansions of the normalized maxima of bivariate elliptical triangular arrays are established.

关键词： Bivariate elliptical triangular array maximum second-order expansion second-order regular variation

Joint Limit Distributions of Exceedances Point Processes and Partial Sums of Gaussian Vector Sequence

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Acta Mathematica Sinica,English Series 2012年第8期28卷 1647-1662页

作者： zuo xiang PENG Jin Jun TONG Zhi Chao WENG School of Mathematics and Statistics Southwest University Department of Actuarial Science Faculty of Business and EconomicsUniversity of LausanneUNIL-Dorigny 1015 LausanneSwitzerland

In this paper, we study the joint limit distributions of point processes of exceedances and partial sums of multivariate Gaussian sequences and show that the point processes and partial sums are asymptotically independent under some mild conditions. As a result, for a sequence of standardized stationary Gaussian vectors, we obtain that the point process of exceedances formed by the sequence （centered at the sample mean） converges in distribution to a Poisson process and it is asymptotically independent of the partial sums. The asymptotic joint limit distributions of order statistics and partial sums are also investigated under different conditions.

关键词： Multivariate Gaussian sequence exceedances point process partial sum order statistic joint limit distribution

A square root information filter for multi-GNSS real-time precise clock estimation

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Satellite Navigation 2021年第1期2卷 400-413页

作者： xiang zuo Xinyuan Jiang Pan Li Jungang Wang Maorong Ge Harald Schuh Department of Geodesy GeoForschungsZentrum(GFZ)Telegrafenberg14473 PotsdamGermany Institut Für Geodäsie Und Geoinformationstechnik Technische Universität BerlinKaiserin-Augusta-Allee 104-10610553 BerlinGermany.

Real-time satellite orbit and clock estimations are the prerequisite for Global Navigation Satellite System(GNSS)real-time precise positioning *** meet the high-rate update requirement of satellite clock corrections,the computational efficiency is a key factor and a challenge due to the rapid development of multi-GNSS *** Square Root Information Filter(SRIF)is widely used in real-time GNSS data processing thanks to its high numerical stability and computational *** real-time clock estimation,the outlier detection and elimination are critical to guarantee the precision and stability of the product but could be *** this study,we developed a new quality control procedure including the three standard steps:i.e.,detection,identification,and adaption,for real-time data processing of huge GNSS *** is made to improve the computational efficiency by optimizing the algorithm to provide only the essential information required in the processing,so that it can be applied in real-time and high-rate estimation of satellite *** processing procedure is implemented in the PANDA(Positioning and Navigation Data Analyst)software package and evaluated in the operational generation of real-time GNSS orbit and clock *** demonstrated that the new algorithm can efficiently eliminate outliers,and a clock precision of 0.06 ns,0.24 ns,0.06 ns,and 0.11 ns can be achieved for the GPS,GLONASS,Galileo,and BDS-2 IGSO/MEO satellites,*** computation time per epoch is about 2 to 3 s depending on the number of existing ***,the algorithm can satisfy the IGS real-time clock estimation in terms of both the computational efficiency and product quality.

关键词： SRIF Precise clock estimation Quality control Real-time GNSS