Research on the Interrelationship among Understanding, Memory and Oral Expression in Listening Teaching of non-English in Higher Vocational College

This is a research report on the interrelationship among understanding, memory and oral expression in listening comprehension training. The research investigated 150 non-English majors through a questionnaire in a higher vocational college. The result indicates that the interrelationship among understanding, memory and oral expression in listening classes which are determined by the listening materials and teaching method directly influences students' listening proficiency and speaking ability. It is suggested that some strategies to be used to foster students' abilities in these three areas so as to improve their listening ability.

Evolution trend of the water quality in Dongping Lake after South-North Water Transfer Project in China

To investigate the evolution trend of water quality in Dongping Lake after South-North Water Transfer Project operation as well as to ensure the safe usage of the water receiving areas, water samples were collected and determined before and after water delivery in different hydrological seasons. Then, comprehensive pollution index method, comprehensive nutrition state index method and health risk assessment model were utilized to evaluate the quality, nutrition, and health risk of Dongping Lake water. Results showed that the quality of Dongping Lake water still met level Ⅲ (light pollution) no matter before or after water delivery. The nutrition state was improved from light eutropher before water delivery to mesotropher after water delivery. The health risk level was reduced from high-medium before water delivery to medium level after water delivery. In summary, the operation of the eastern route of South-North Water Transfer Project is beneficial for water environment improvement of Dongping Lake.

Statistical characteristics of heavy metals content in groundwater and their interrelationships in a certain antimony mine area

In recent years, most of domestic and foreign researches about heavy metal pollutions of metal mine mainly focus on water, soil and plants on the surface. There is lack of researches about heavy metal pollution in groundwater of metal mine. In this research, a certain antimony mine area is selected as a typical study area. Also, the study about statistical characteristics of heavy metals in groundwater has been carried out. Furthermore, the interrelationships have been preliminarily discussed through related analysis, such as relevant analysis, cluster analysis and principle component analysis. The results show that: the excessive elements in groundwater of study area are Sb, As, Pb, Se, and Ni. The average mass concentration of Sb, As, and Pb is higher than that of drinking water standards(GB5749-2006). The concentration of most heavy metals in dry season is lower than or equal to that in wet season for groundwater. Zn is the only metal in groundwater showing a different pattern, the concentration of which in dry season is higher than that in wet season. Under the impacts of stratum leaching and absorption effect, the concentration of heavy metals(except Pb and Ba) in groundwater are lower than or equal to that in surface water. As and Se, the two heavy metals have a significant positive correlation, which shows the two elements might have gone through similar environmental geochemical effect. Also, the connection among Zn, Hg, Pb, and Mn is not obvious; therefore, the sources of those elements are quite different. In addition, the elements of Se and As have obvious positive interrelationship with elements of CO_3^(2-) and F^-. Also, the Pb has significant positive correlation with PO_4^(3-), H_2SiO_3 and oxygen consumption. The results of cluster analysis show that 9 different heavy metals in the study area can be divided into 3 categories: Zn, Cd, Mn, Hg, Cu, and Cr belong to the first category, Se and As belong to the second one, and the last category is Pb. Also, the principle component analysis divides 6 heavy metals(Zn, As, Hg, Pb, Mn, and Se) into 4 different principle components, which can be utilized to assess heavy metals pollution situations in groundwater. The reliability of this method is higher than 91%. Moreover, the research provides theory basis and models for establishing evaluation index system and exploring the evaluation method of heavy mental pollution in groundwater.

Eco-environmental benefit assessment of China's South-North Water Transfer Scheme——the middle route project

This paper assess the eco-environmental benefits that may come from the middle route project of China's South-North Water Transfer Scheme(SNWT) with principles and methods of eco-economics and planning reports of SNWT's middle route project. Some benefits were calculated in monetary units. To make sure that the results can be comparable with normal monetary indices, concrete assessment objects and the parameters are prudently selected according to the major characteristics of the project and its water import region. Primary assessment revealed that in different project construction stages, the benefit could be more than 13 07 billion RMB Yuan in 2010 and 19 79 billion RMB Yuan in 2030, respectively. The monetary value tends to increase with social-economic development. To realize these potential benefits, however, calls for more endeavors.

South-north asymmetry of proton density distribution in the Martian magnetosheath

We perform a statistical analysis of data from the Mars Atmosphere and Volatile Evolution (MAVEN) project on the global distribution of protons in the Martian magnetosheath. Our results show that the proton number density distribution has a south-north asymmetry. This south-north asymmetry is most likely caused by the south-north asymmetric distributions of the crustal magnetic fields at Mars. The strong crustal magnetic fields push the inner boundary of magnetosheath to a higher altitude in the southern hemisphere. Due to the outward movement of the inner boundary of the magnetosheath, a compressed magnetosheath forms, causing subsequent increases in proton number density, thermal pressure, and total pressure. Eventually, a balance is reached between the increased total pressure inside the magnetosheath and the increased magnetic pressure inside the induced magnetosphere. Our statistical study suggests that the Martian crustal magnetic fields can strongly affect the proton number density distribution in the Martian magnetosheath.

建构作者、学术期刊与知识资源平台新型合作关系

在融媒体和人工智能时代,知识资源平台发挥的作用越来越大,同时,作者、学术期刊与知识资源平台之间的版权问题和利益分配问题也日益凸显。应在遵守国家相关法律法规的基础上,加强多方主体的合作,坚持利益均衡原则,改变以往作者、学术期刊和知识资源平台合作过程中的不平等关系,构建作者、学术期刊和知识资源平台的新型合作关系,推动学术期刊高质量发展,为文化强国作出各自应有的贡献。

融合图卷积和卷积自注意力的股票预测方法

随着我国股票市场的不断发展,一只股票的走势往往受其企业上下游产业发展的影响。针对主流股票预测模型忽略了股票间关联关系的不足,提出了融合图卷积和多头卷积自注意力的股票趋势预测模型。首先使用互相关系数计算多只关联股票的关系矩阵,再使用图卷积神经网络结合关系矩阵对关联股票进行特征提取,其次使用多头卷积自注意力提取时间特征,最后使用分类损失函数多项式展开框架对损失函数进行优化,并进行趋势预测。实验结果表明,所提模型在准确率、查全率、召回率以及F1分数上均优于门控循环单元、时间卷积网络等模型。

多层网络视角下沪深港股票市场关联性演化研究

随着“沪港通”和“深港通”的开通,沪深港股票市场间关联性日趋紧密,而充分认识沪深港股票市场间关联性的演化特征,对维持沪深港股票市场的稳定具有重要的价值.本文从多层网络视角出发,同时考虑股票收益率间的相关性和投资者情绪间的相关性,构建沪深港股票市场多层网络,进而探究沪深港股票市场间的关联关系及演化过程.结果表明,“沪港通”开通后,沪深港股票市场收益率间的关联性以及投资者情绪间的关联性没有显著增强,但不同市场间收益率与投资者情绪的关联性显著增强.而“深港通”开通后,沪深港股票市场收益率间、投资者情绪间以及收益率与投资者情绪间的关联性均显著增强.此外,不同市场之间收益率与投资者情绪间的交互关系并不对称,沪深两市股票收益率与港市股票投资者情绪的关联性较高,而港市股票收益率与沪深两市股票投资者情绪的关联性却较低.

发达职业体育市场的生成原理、分类及相互间关系研究

市场是职业体育赖以生存的条件,发达职业体育已经形成了与竞赛生产规律相匹配的市场运行机制。本文论述了发达职业体育市场的生成原理,并基于欧美发达职业体育市场的运行实践,厘清了支撑发达职业体育市场生存的2个闭路循环系统,建构并阐释了发达职业体育市场的飞鸟模型,探究了发达职业体育3类市场的内涵及相互间的关系。同时,针对中国体育职业化市场培育中存在的问题,如泵血驱动市场乏力、俱乐部经营能力欠缺、非理性市场投资行为等,提出了一系列改进建议,包括优化俱乐部股权结构、加强薪酬管理、推进俱乐部健康稳定发展和依托社会力量发展公益活动等,以期推动中国职业体育市场的健康发展。

不同产地云当归品质与其土壤养分的相关性研究

综合评价不同产地云当归质量,研究药材有效成分与其产地土壤养分之间的关系,为云当归质量评价研究及优质高产栽培提供理论依据。本研究采用高效液相色谱和紫外可见光谱测定云当归中7个有效成分含量,结合熵权TOPSIS法对不同产区药材进行综合质量评价;同时测定不同深度土层的8个土壤养分,结合双变量分析探讨土壤养分与药材有效成分之间的相互作用关系。研究结果发现,云南迪庆香格里拉的样本综合质量最佳,土壤中全氮(TN)、全磷(TP)、全钾(TK)和硝态氮(NO_(3)-N)的含量以棕色土壤最高,红色土壤最低;大部分产地土壤养分含量基本能满足云南当归药材生长所需的养分需求,而TK含量需根据实际情况适当增补施肥,从而促进云当归中5-羟甲基糠醛和多糖含量的积累。

复杂地质条件下市政高架桥与盾构区间近接施工影响研究

为研究轨道交通工程与新建市政桥梁近接施工过程中的相互影响关系,文章以某新建市政高架桥与盾构区间近接施工为例,研究施工方案对高架桥及区间的影响效果,并对施工过程中的风险采取一定的措施,利用GTSNX岩土数值模拟软件,建立三维模型并模拟相关的施工顺序,对工程关键位置进行变形分析。同时结合类似工程,提出高架桥与其他市政工程近接施工过程中的风险把控重点。研究结果表明:桥梁上部结构施工后,区间竖向变形值与区间结构距桥梁桩基的距离正相关,以期对类似市政近接施工提供一定的参考价值。

新时代“枫桥经验”与公安机关新质战斗力提升:内在关系与实践进路

公安机关新质战斗力是新质战斗力、新质生产力的衍生概念,是全国公安机关深入贯彻落实习近平总书记重要论述精神而提出的一个具有公安特色的时代性新概念。公安机关新质战斗力是推动新时代公安工作高质量发展的引擎器,新时代“枫桥经验”是加强新时代公安工作基层基础的催化剂,两者对推进公安工作现代化都有着重要作用,并存在互促互进的关系。要把坚持和发展新时代“枫桥经验”作为加快和形成公安机关新质战斗力的重要实践进路:加强党的领导,为提升公安机关新质战斗力提供根本保证;坚持人民主体地位,为提升公安机关新质战斗力树立根本立场;创新社会治理方法,为提升公安机关新质战斗力提供有效路径;筑牢基层基础工作,为提升公安机关新质战斗力提供坚强保障。

南极菲尔德斯半岛陆地、淡水、潮间带、浅海各生态系统的结构及其相互关系的研究

根据我国在南极菲尔德斯半岛地区１０年的各项研究成果和南极其它相关地区的研究结果，综合分析了菲尔德斯半岛地区陆地、淡水、潮间带及浅海４个生态系统的结构和相互关系。研究结果表明，营养物质的流动使得这４个生态系统相互联系形成一个整体。在这种物质流动的过程中，动物的作用尤其关键，如海鸟（企鹅、黑背鸥等）以及海豹的繁殖、取食等活动对营养盐的搬运有利地促进和疏通了营养物质在系统间的流动。此外，物理作用（如雨水的冲刷、潮汐作用和径流的带动等）也有重要影响。

水生环境中细菌与微藻的相互关系及其实际应用

概括了细菌和微藻之间的相互关系及其作用机理,阐述了细菌抑制有害微藻、微藻抑制病原细菌、细菌与微藻协同净化水质的研究进展,并针对水产养殖的实际,提出菌-藻关系研究及开发应用的一些思路。

土壤中锌的形态分布及其影响因素

本文用作者修改的形态提取方法研究了江苏省几种土壤中锌的形态。结果表明,土壤中的锌大部分以硅铝酸盐矿物态和氧化铁结合态形式存在。锌在土壤中的形态分布随土壤pH、有机质含量等因素不同而异。不同形态之间存在平衡关系。

市政污水TOC与COD相关性

总有机碳(TOC)相对于化学需氧量(COD)能够更全面地反映水体中有机物的污染程度,而且TOC测定仪操作简单,数据准确,用TOC监测代替COD监测有利于实现监测仪器化,自动化。通过对市政污水中有机污染物的COD与TOC监测数据的相关性研究,建立了二者之间的线性回归方程和理论值范围方程,为污水中有机污染物的TOC监测代替COD监测提供了实践依据。

江苏省稻瘟病菌生理小种的演变及与水稻品种的相互关系

用7 个全国统一鉴别品种对1980～1996 年采集的江苏省稻瘟病标样的1 032个单孢菌株进行小种鉴定, 分析了江苏省稻瘟病菌小种演变的原因及与水稻品种的关系。结果表明, 江苏省曾先后出现过8 群22 个小种, 除1990年ZA小种群、1991 年ZD、ZE小种群上升为优势种群外, ZG1 小种一直是江苏省的优势小种, 出现频率达66.20% , 为江苏省稳定小种。江苏省各稻区小种组成有一定差异。水稻栽培品种是决定小种种群结构的主要因素之一, 江苏省大部分品种与ZG1小种有亲和性, 只有少数品种能被ZA、ZB、ZC、ZD和ZE群小种侵染, 可能是ZG1 小种在江苏省稻区成为优势小种的主要原因之一。从江苏省大部分主栽品种上能分离到2 个以上小种且不同品种上其小种的组成有一定差异,构成了田间小种结构的复杂性。

中国主要城市入境旅游网络结构演变分析

基于旅游经济联系模型,运用GIS技术手段,构建中国入境旅游城市的旅游经济联系网络,并对1997年和2010年的Top1、Top5和Top10网络的结构演变特征进行研究。研究发现:①整体网络规模在缩小,但是最大联系强度和平均联系强度却明显增长,且最大联系强度一直出现在广州和深圳之间;②整体网络结构处于核心极化阶段,总体呈现"东部强,中西弱"的"L"型分布,一级节点城市北京、上海和广州的集聚作用显著,且进一步增强;③旅游城市联系以东部区内联系为主,东部地区城市的集聚作用愈加明显,中部和西部地区城市的集聚作用在减弱;④中国入境旅游城市可分为三大体系,形成三极多核的空间格局。

城市土地利用与交通相互关系研究进展

城市土地利用与交通系统(UrbanLand-Use and Transport System,ULUTS)是城市"生命体"活动的承载系统,研究其相互作用机理是正确识别、调控城市"病"的基础。从理论历史发展、实证经验、模型和软件分类、模型不确定性等方面对ULUTS的复杂作用机制进行了归纳总结,对城市土地利用、交通系统、区位活动和可达性之间的复杂联系进行了初步探讨,并通过文献分析、对比为深层次解决土地利用与交通问题提出了一些建议。