东胜煤田含煤岩系层序地层特征与聚煤规律分析——以东胜煤田阿不亥煤炭勘查区为例

研究区含煤岩系主要为侏罗系中统延安组,通过煤岩层研究和对比,认为延安组本身为一个完整的层序,可分为三个体系域、五个小层序组和18个小层序;体系域、小层序组和小层序之间的转换面是聚煤的主要层位。含煤地层可编号18层煤,其中可采煤层15层,根据层序地层分析和含煤岩系沉积特点,将含煤地层分为三个岩性段,5个煤组,相对应三个聚煤期和5个成因单元。该区的聚煤作用主要受到沉积环境、古地形和古构造的控制。     

Soil properties at the tree limits of the coniferous forest in response to varying environmental conditions in the Tianshan Mountains,Northwest China

The continuous coniferous forest in the Tianshan Mountains primarily consists of Picea schrenkiana. The forest forms an unbroken 1,000 km forest zone extending from west to east on the northern slope of the Tianshan Mountains, where environmental conditions such as precipitation, temperature and terrain vary greatly. To gain insight into the differences between soil properties at the upper and lower limits of P. schrenkiana, soil underlying the forests was studied along 4 transects located at Jinghe, Manasi, Fukang, and Balikun, where the natural conditions are typical and therefore representative of western, mid-western, mid-eastern and eastern portions of the Tianshan Mountains. The soil type under the coniferous forest on the northern slope of the Tianshan Mountains is gray cinnamon forest soil. For each transect, soil samples were collected from three different depths (0–5, 5–30 and 30–70 cm) in the area near the upper and lower limits of P. schrenkiana. A total of 48 soil samples were collected from 16 soil profiles and analyzed in two different laboratories. The soil pH, organic matter (OM), total N, total P, CaCO₃, and electrical conductivity (EC) were analyzed using common pedological methods. The continuous distribution of P. schrenkiana on the northern slope of the Tianshan Mountains was caused by combined water-heat conditions and pedological factors. At the upper and lower tree limits, where differences existed in the soil parent materials, precipitation, topography, combined water-heat conditions, and local atmospheric pattern, the soil properties showed a close relationship with the local environmental conditions. Due to the presence of high precipitation over the Manasi transect, the soil was fertile and had a low CaCO₃ content. In contrast, low soil fertility with high CaCO₃ was observed in the soil along the Jinghe and Balikun transects, where there was low precipitation. Although the soil properties varied on the northern slope of the Tianshan Mountains due to the presence of different environmental conditions across the 1,000-km forest zone, this region was suitable for the growth of P. schrenkiana. Taken together, the results of this study indicated that soil played an important role in controlling the continuous distribution of the P. schrenkiana along the northern slope of the Tianshan Mountains.     

黄海北部海域沉积物反硝化细菌数量及反硝化速率的季节变化

用乙炔抑制法和最大或然数（most probable number,MPN）法对黄海北部海域沉积物反硝化速率及反硝化细菌数量的季节变化进行了研究,结果表明,该海域反硝化速率在夏季最大,范围在3．2～7．5μmol／（m^2·h）之间,平均值为4．85μmol／（m^2·h）;而在春、秋季其范围分别为0．26～2．65μmol／（m^2·h）和1．21～4．12μmol／（m^2·h）。该研究海域3个季节反硝化细菌数量差别较大,春、夏、秋季分别在1．78×10^4～8．12×10^4,1．18×10^6～6．18×10^6和0．72×10^5～4．50×10^5个／g之间。春、秋两季反硝化速率和反硝化细菌数量之间呈显著性正相关,相关系数分别为0．759和0．750（P〈0．05）。本结果可为黄海北部海域氮循环机制研究提供重要参考。     

城市总体规划环境影响的GIS模拟与评价分析

城市环境影响评价是城市规划与可持续发展中的一个重要问题.从规划部门对设计方案进行分析比较、定量评估的实际需求出发,采用地理信息数据处理与模拟等技术,归纳了GIs的评估指标体系.针对城市总体规划方案,将GIs数据引人气象模型,建立城市规划气象GIs论证评价技术路线;对规划方案进行空间概化、划分并识别单元特征,通过土地利用...     

山东地区三类典型制药企业的VOCs源成分谱及排放特征研究

制药行业因在提取等过程中使用有机溶剂排放大量挥发性有机物（VOCs）而备受关注.本研究在山东省选择化学合成、生物发酵、中药共三家制药企业开展了107种VOCs组分的监测和分析,并建立制药企业的VOCs源成分谱.研究结果表明：化学合成类和生物发酵类制药企业排放总质量浓度均超过20 mg/m³,中药制药企业的样品的平均质量浓度相对较小,为902.66 μg/m³.本研究所分析的107种组分中,以含氧挥发性有机物（OVOCs）为主,三家企业均超过75%,其中,化学合成制药类卤代烃物种的占比较高.企业类型、生产环节、收集排放措施等是影响VOCs成分的重要因素.     

成都市建筑工人流感认知及行为干预

目的 做好建筑工人群体防治流感、禽流感工作,实施有效干预,避免流感流行.方法 进行干预前后的对比研究,采用问卷调查法对结果进行评价.结果 成都市建筑工人流感基本知识总体回答正确率干预前后分别为56.3％和67.0％,能够做到多通风预防流感的建筑工人从69.0％比例增加到86.0％,正确洗手的人数所占比例由干预前的70％提高到干预后的82％.结论 干预后建筑工人对流感的基本知识、态度和行为等方面明显改善,干预方式对建筑工人预防流感起到积极作用.     

土地利用对气候变化影响研究进展与图谱分析

本文利用知识可视化工具针对土地利用对气候变化影响研究进行文献共被引分析,整理得出土地利用和气候变化研究的主要知识聚类和研究热点,同时基于大气碳循环和土壤有机碳研究知识群进行施引文献分析并总结其研究主题,然后进一步归纳了气候变化背景下影响全球碳平衡的驱动因素及其对策。本研究可以详细分析基于土地利用对气候变化影响背景下不同知识群及其研究对象的特点,得出研究对象变化的驱动因素及对策,以期为科学研究提供基础。     

Study of the Gravity Changes before and after the Jingtai Ms 5.9 Earthquake

By systematically analyzing the data of gravity reiteration in the Hexi region and taking a dynamic viewpoint.we have studied the evolution characters of gravity field during the preparation-occurrence of the Jingtai Ms5.9 earthquake of June 6,2000,The patterns of dynamic change of the gravity field clearly reflected how the gravity field evolved from the quasi-homogeneous state to non-homogeneous state for earthquake preparation and then the earthquake occurred.Besides,we have also studied the relation between the characteristic gravity change and strong earthquake activity.     

Regional tectonic deformation setting before the Ms8.1 earthquake in the west of the Kunlun Mountains Pass

This paper gives a preliminarily study of the regional tectonic deformation setting before the M_s8.1 earthquake that occurred in the west of the Kunlun Mountains Pass; in the study, the data of the velocity field of crustal horizontal movement during 1991-2000 observed by GPS in and around the Qinghai-Tibet block and those of gravity reiteration in 1998 and 2000 were used. Analysis shows that the preparation and occurrence of this large earthquake are related to the horizontal movement and deformation setting in a large region and might be attributed to the block activity on a relatively large scale. Within the Qinghai-Tibet block, the region of left-lateral shear deformation is of a very large extent. This large earthquake occurred right in such a place where the left-lateral shear strain along the fault strike had the highest rate and the planar dilatation strain was tensile, which was on the margin of negative value region of abnormal gravity variation. The regional tectonic deformation setting can help the huge left-lateral strike-slip rupture to develop.