中国修辞学:20世纪回顾与21世纪展望

总结了 2 0世纪中国修辞学理论与事业所取得的成就和经验 ,展望了 2 1世纪中国修辞学的发展趋势以及学科建设的可能。作者认为在 2 0世纪 ,中国修辞学在修辞观、研究对象及研究领域和方法、修辞规律、修辞学史、修辞学事业等方面都取得了巨大成就 ,在我国国民素质教育中起了重要作用 ,并将在 2 1世纪取得更大发展 ,有望建立更加完备的学科体系。     

试论世纪之交的朝韩关系与统一之路

朝鲜半岛的现状，是二战遗留下的，冷战时又受大国利益作用的产物，现在，冷战已结束十年有余，国际关系发生了巨大变化，和平与发展成为当今世界的两大主题，朝鲜半岛作为国际关系中不可忽视的热点问题，也发生了巨大变化，从主客观两方面出发，两国关系得到改善，朝鲜半岛赢得和平是大势所趋，然而，参照越南，德国和中国的统一模式，结合纷繁复杂，变化多端的国际环境来分析，朝鲜半岛实现民族，国家的统一的道路是前途光明而又坎坷不平。     

Estimations of primary production and export production in the South China Sea based on sediment trap experiments

The results of time series sediment trap experiments in the South China Sea show that particulate organic carbon (POC) fluxes are influenced by the monsoons. The increase of productivity in the northern South China Sea is mainly due to northeast monsoon while in the central South China Sea the influence of southwest monsoon becomes more prominent. The annual primary production and export production calculated based on POC fluxes are 53.0–63.4 and 10.32–12.93 gC m^-2a^-1, respectively. The enhancement of POC flux during monsoon period suggest that higher palaeoproductivity or organic carbon accumulation rate in glacial age in the South Chma Sea might be the result of strengthening of the monsoons.     

我国农业生产中的施肥理论与实践误区

分析了我国当前农业生产中植物营养学理论及其施肥实践存在的几个误区:植物必需营养元素分类误区;植物碳、氢、氧来源认识误区;植物必需营养元素生产重要性评价误区;化肥及有机肥肥效评价误区。针对误区带来的生产问题,提出了植物必需营养元素四级分类法及研制厌氧堆肥等对策措施。     

洪泽湖河湖交汇区典型杨树人工林碳通量月尺度变化特征

【目的】揭示洪泽湖水位夏低冬高的独特水文特点对河湖交汇区杨树人工林净生态系统碳交换(NEE,简称碳通量)产生的影响。【方法】采用涡度相关及土壤水热监测系统,对洪泽湖湿地河湖交汇区典型杨树人工林碳通量及其环境因子进行了连续3 a(2016—2018年)的观测,分析月尺度上碳通量变化及其与环境因子的关系。【结果】①洪泽湖河湖交汇区杨树人工林的NEE值具有明显“V”形变化曲线,白天表现为碳吸收,夜间表现为碳释放,日均碳汇时间为10 h;②研究期间各旬NEE值在2018年的2月上旬最高(7.117 g/m²),最低值出现在2017年的7月中旬(-212.256 g/m²);3年间年均NEE值为-1 413.403 g/m²;③在洪泽湖开闸时期(5—8月)水位低,土壤含水率和风速是影响NEE的主要因素,关闸时期(9月至翌年4月)水位高,NEE主要受空气温度和饱和水汽压差影响。【结论】夏季对洪泽湖开闸放水,有利于河湖交汇区杨树生长及碳汇增加,冬季蓄水地下水位抬高,对杨树生长产生的不利影响可以通过开沟筑垄来消除,进而有利于区域杨树人工林全年碳汇功能的提升。     

探究安全文化体系建设对煤矿安全生产和管理的作用及意义

本文针对我国煤矿近年来重特大事故频发这一实际情况,提出加强安全生产只靠法律法规和规章制度这些"硬"手段还不够,应在正确认识"以人为本"的安全管理理念的前提下,运用教化人、激励人、塑造人这些"软"手段,树立全新的安全思维。强调安全文化体系建设对煤矿安全生产和管理的作用及意义。     

南海东部Z油田提液策略及智能注采优化

针对南海东部Z油田转注完善注采井网后,中高含水期油田主力层持续递减、提液井选取困难,提液疏导液流增油难度加大等问题,根据智能注采优化方法,形成最优提液策略.从地层能量、储层潜力、引流优化等角度逐一剖析,运用储层品质指数与无因次采液指数明确内在高潜力提液井,利用基于支持向量代理辅助的粒子群算法(SVR-PSO)注采优...     

Relations between man and nature reflected by the evolution of the Neolithic production tools in the Three Gorges region of Yangtze River,China

The relations between man and nature reflected by evolution of Neolithic production tools in the Three Gorges region of Yangtze River is discussed in this paper.Our results show that there is a good correlation between the percentage vibration of cutting tool types and the environmental evolution indicated by the natural profile nearby.It is possible for ancestors from the Three Gorges region to learn the advantage of mortise and tenon in the early Neolithic Age because they used the stones as vital tools for processing woods.The hunting method in the early Neolithic is throwing,which was inherited in the mid-Neolithic Age when hunting with arrow and bow was developed.Fishing tools are found at the same period.Numbers of net sinkers and spinning wheels unearthed from the strata of the Western Zhou Dynasty from Zhongba Site reveal the fact of fishing with net,while a mass of fishbone pits indi- cate the powerful productivity brought by new production tools.Quantity of stone spades and stone hoes proves that cultivation agriculture by hoe is extremely attached importance by the ancestors in the Three Gorges region.Moreover,the developed agriculture in Daxi Culture at Zhongbao Island benefits from the landform,climate,traffic location,etc.Otherwise,the reason that the farming tools declined in the late Neolithic Age is related to the extreme flood during the early Xia Dynasty and the fishing hunting preference of some ancient settlements.This research shows that ancestors of the Three Gorges region during the Neolithic Age attached importance to fish hunting and cultivation, fought against the natural environment by production tools,constantly created and improved them, then comprehensively utilized them to evolve the relations between man and nature.