安徽省城市化水平区域差异研究

在对安徽省城市化水平区域差异分析的基础上，运用基尼系数模型，阐述了安徽省城市化水平的发展态势，同时对安徽省城市化水平的区域格局进行了系统的划分。最后提出了安徽省城市化发展的对策，为优化安徽省城市化水平区域格局提供了科学理论基础。     

An investigation of the effects from the user’s hand and head over received level and adaptive power control of a GSM mobile phone in typical operating environment

Current evolution of wireless personal communications has necessitated a comprehensive understanding of electromagnetic interactions between handset antennas and nearby human body. In this work the handset–human body interactions were evaluated in various configurations (with and without user’s hand; with and without user’s head, and combinations of them) in order to obtain statistical averages of the overall performance for system link evaluations. The measurements were performed using the random-field measurement (RFM) method, and thus the acquisition of large amounts of data about human–mobile phone interactions in typical operating environment with measured the received RF signal strength (RXLEV), and the output power level (TXLEV) on mobile station. The RXLEV and the TXLEV was measured over the air interface in the networks on two Bulgarian GSM mobile operators (Mtel and Vivatel). Both uplink and downlink measurements were performed in urban area in three cities. Each measurements were carried out in a building included both line-of-sight and non-line-of-sight propagation of the electromagnetic waves between mobile station and base station. The results showed that the user’s hand and head induces more significant changes on the received RF signal strength in case when broadcast control channel (BCCH) levels are up to −60 dBm. Also the alterations of receiving RF signal strength and output power level of the MS are influence stronger from the larger size of the hand and head of user. The influence from presence of the head and hand of the subscriber in talk position over the alteration of the receiving RF signal strength is in boundaries from 14.21 dBm to 19.1 dBm (man) and from 8.5 dBm to 12.05 dBm (woman). The presence of the user’s hand and head increased the output power level of mobile station with 12 dBm to 14 dBm (man) and with 10 dBm to 12 dBm (woman) compare to output power level without user’s hand and head.     

煤矿安全从业人员工作满意感与应激水平、自我效能感的关系

运用问卷法,以43名国有煤矿安全从业人员为研究对象,探讨了在煤矿这一特定环境下的工作人员其工作满意感、应激水平和自我效能感的关系。结果发现应激水平能负向预测工作满意感,自我效能感不仅能正向预测工作满意感,还能调节应激水平对工作满意感的影响,较高的自我效能感能使应激水平对工作满意感的负效应转为正效应。根据笔者研究结果,提出了减少工作应激刺激、提供培训提高员工自我效能感、制定合理的人员安置和促进员工发展的人事制度,以增强员工的工作满意感的建议。     

基于多种预测模型的玉米低温冷害预测集成模型

引入大气环流特征量因子、500hPa高度场因子、太平洋海温因子以及预报量本身的均值周期因子等四类因子的低温冷害预测子模型来建立玉米低温冷害预测集成模型。利用该集成模型预报下一年温度等级时，将上一年的实况资料输入预测模型，滚动预测，克服了统计模型预报时效短的缺点，且试报准确性高，无错报。     

Jason-2卫星测高数据在陆地水域水位变化监测中的应用——以南洞庭湖为例

论文在对Jason-2/OSTM GDRs数据特点、湖泊水位计算原理、测高数据编辑与处理过程进行详细阐述的基础上,以地处长江中游的南洞庭湖区为监测实例,对Jason-2卫星测高数据在陆地水域水位变化监测中的应用进行了试验研究。在同监测点距离最近的地面水文站实测水位的对比来看,二者监测结果间存在显著的线性相关关系,相关系数达0.974。表明基于Jason-2/OSTM GDR数据的水位监测结果具有较高的可信度,在陆地水域水位变化卫星监测中具有一定的现实可行性,从而为我国陆地水域水位变化监测提供了一种新的有效技术手段。     

安全仪表系统在输油气管道中的应用、问题及建议

简要介绍了安全仪表系统的基本原理及应用现状,就应用中存在的问题提出了改进油气管道安全仪表系统的建议,以保障油气管道的安全运营。     

海底隧道用海面积界定方法及宗海图编绘探讨

在了解海底隧道类型的前提下,对可能影响海底隧道用海界定的因素进行筛选,从中选出相对影响最大的海底爆破振动因素进行研究。以大连湾海底隧道的相关数据为例,利用前苏联萨道夫斯基经验公式,计算出大连湾海底隧道的安全保护距离,即海底隧道用海界址外扩距离。最终,按照文中提出的宗海(空间)界址图的编绘方案,绘制出大连湾海底隧道的宗海图。     

“三江”并流区地质灾害危险性量化评价

"三江"地区是地质灾害强发区,又是资源富集区和环境重点保护区。为了实现对区内地质灾害危险性的定量或定量评价,根据该区"崩、滑、流"地质灾害的发育机制-地形地貌的改造和演化过程中各种外动力地质作用的动力机制,将促进地质灾害发育的各类影响因子总和-动力势与减缓地质灾害发育的各类影响因子总和-抗力势之间的差值作为地质灾害发育动力强度指数,并且用于量化评价地质灾害危险性程度。通过41个典型地质灾害点的调查分析对各类影响因子赋值,采用多元线性回归方法求解出的地质灾害发育强度指数与影响因子之间的线性方程,作为地质灾害危险性量化评价模型。采用该线性模型简要计算了"三江"并流区典型区段的地质灾害发育强度指数,并通指数的大小为依据统一划分地质灾害危险性程度,避免了人为分级和分区的随意性。     

浅谈现有脱硫装置的扩容改造

随着国内煤炭市场的供应变化,一些机组燃煤实际含硫量与设计相比有较大提高,结合工程实际,重点讨论了现有湿法脱硫装置扩容改造的几种方法,比较了其差异和优缺点,并提出了一些建议。     

南方高位池养殖生态环境影响及对策

文章综合理论分析和现场调查结果,分别从污染排放情况、对近岸海域水质、水生生物、地下水、土壤、景观和海防林的影响等几方面阐述高位池养殖对生态环境的影响,结合产业特点,提出了高位池养殖科学发展和环境保护的合理对策。