基于贝叶斯网络的质量管理实践对绩效的影响评价

提出了将结构方程模型与贝叶斯网络相结合, 对因果关系进行预测和诊断的方法. 该方法既发挥了结构方程模型基于理论的实证证实能力, 又突出了贝叶斯网络处理非线性关系及预测和诊断的能力, 有利于管理决策的制定. 进一步将该方法应用到质量管理实践与绩效关系的研究中, 明确了质量管理实践、质量绩效和企业绩效间的影响关系, 为企业有效的质量决策提供了依据. 该方法同样可应用于顾客关系管理、风险评价等领域.     

基于GIS的土地利用及碳汇量时空动态研究——以奇台县为例

为探讨奇台县土地利用、碳汇量及碳汇价值动态特征,利用遥感影像解译得到1980年-2007年土地利用矢量图,选择类型和景观水平景观指数进行景观格局动态分析,引入碳汇量与碳汇价值模型,对奇台县27年来碳汇量及碳汇价值进行测评.结果表明：27年期间该区土地利用和景观格局发生显著变化.其中建设用地逐年增加,耕地、林地、草地先增加后减少,水域和未利用地先减少后增加.该区生态系统的碳汇量和碳汇价值,分别由1980年的84 483 071 t和8 870 722.46万元上升为2007年的84585 294t和8 881 455.87万元.说明土地利用动态变化使生态系统碳汇量和碳汇价值增加,合理的土地利用方式能够改善生态环境,促进资源环境与经济可持续发展.     

基于信誉的增强P2P网络服务稳定性的激励机制

为了抑制网络节点"搭便车",同时增强P2P(Peer-to-Peer)网络服务的稳定性,提出一种基于信誉的增强P2P网络服务稳定性激励机制。该激励机制将网络节点的服务时间分为2段,第1阶段采用传统信誉激励机制效用函数;第2阶段采用增加了提成因子的改进效用函数。仿真结果表明,该激励机制在提成因子的作用下,不仅可以使网络系统排队强度低于1,而且缩短了用户在网络中等待服务的时间。     

日本双棘长蠹成虫对8种植物挥发物的EAG和行为反应

为了寻找新型的防治日本双棘长蠹(Sinoxylon japonicum Lesne)的植物源引诱剂,分别测定了成虫对8种植物挥发物的EAG和行为反应.EAG测定结果表明:1.00 mol/L的愈创木酚和邻苯二甲酸二甲酯均能引起日本双棘长蠹较强的EAG反应(p≤0.05)."Y"型嗅觉仪测定结果表明:1.00 mol/L的愈创木酚对日本双棘长蠹成虫的引诱效果最好,选择率达到57%;1.00 mol/L的邻苯二甲酸二甲酯对日本双棘长蠹成虫具有较好的驱避作用.其他挥发物对日本双棘长蠹均无明显的定向作用.     

江苏省游泳队部分运动员心脏形态和心肺功能的研究

采用跑台、彩超结合问卷调查,获得江苏省游泳运动员运动成绩,心肺功能等的基础性数据,掌握运动员运动成绩与心脏形态和心肺功能的内在关系,为科学制订训练计划和科学的运动选材提供依据。选择江苏省游泳队部分运动员,以运动平板和心肺功能仪测试最大摄氧量;以心脏彩色超声心动图测试心输出量、主动脉直径等指标,探索其运动能力和最大摄氧量及心功能之间的关系。结论是:运动员心肺功能各方面的指标以及心脏形态明显优于一般人,不同专项的运动员心肺功能及心脏形态上又会有不同的特点,长距离项目运动员最优,其他运动员没有明显规律,建议选材时加强这方面指标的检测以用于科学选材与运动员的专项选择。     

叠层橡胶支座在抗震中的应用

叠层橡胶支座抗震是结构抗震技术中的新兴技术,是通过采用隔震技术把建筑物上部结构和地基基础“隔离”,来延长隔震结构的系统周期,消化吸收地震能量,从而可以降低上部结构的抗震设防烈度,以达到以柔克刚的效果．文章通过具体的工程实例论述了隔震支座在工程项目中的应用．     

基于积分算子技巧的容量相关估计

利用与积分算子特征值下降速率有关的两种容量相关条件,在抽样是同分布且样本是独立选取的情况下,通过积分算子技巧和假设概率随机事件的方法给出了正则化最小二乘回归学习算法的一致性误差界,并将正则化最小二乘回归学习算法的学习速率提高到了O(m^-β(1+2β))。     

Water cycle evolution in the Haihe River Basin in the past 10000 years

The water shortage problem in the Haihe River Basin is the most severe in China, and has restricted its economic development. Over-extraction of groundwater has been very severe in the past 30 years. To solve this problem, scientific decisions should be made from a historical perspective. It is important to describe water cycle evolution in the Haihe River basin over the past 10000 years. Datasets of paleoclimate, paleogeography, palynoflora, historical record, isotopic abundance ratio and content were collected for research on different time scales. Some interesting conclusions were drawn by a comprehensive analysis method. First, radiation was the intrinsic force driving the evolution of water cycle. Generally, precipitation increased with temperature. Second, precipitation was high during 8 ka-5 ka B.P., the so-called Yangshao warm period of the Middle Holocene, which recharged the major part of the Quaternary groundwater. Third, heavy floods during this period transported sediment to the seaside, forming the Coastal Plain where cities such as Tianjin, Huanghua, Cangzhou are now located. In the last 3000 years, intermittent moderate floods did not have enough energy to transport sediment to the sea. Rivers usually overflowed in the piedmont region of the Taihang Mountains, and sediment deposited there formed the Piedmont Plain, where locate Shijiazhuang, Xingtai, Handan, Baoding and other cities. Precipitation had a high correlation with temperature in Haihe River Basin in the past 10000 years: the high temperature usually coupled with high precipitation. Today precipitation in the Haihe River Basin is relatively low, owing to low temperature. This study reveals the relationship between temperature, precipitation and river networks in the past 10000 years in Haihe River Basin, which has great scientific and practical importance in understanding the current water circulation and water shortage.     

Sample maturation calculated using Raman spectroscopic parameters for solid organics: Methodology and geological applications

The shape and shift of Raman peak of solid organics prove to be capable of revealing atomic and molecular level vibration information of aromatic ring structure and its relationship with sample maturation. Raman "D" peaks and "G" peaks of a series of continuously maturated coal samples were measured, and the inter-peak intervals (G-D) and peak height ratios (Dh/Gh) were derived and correlated with the vitrinite reflectance (vRo%) of standard coal samples. As a result, two formulae were established by using the two Raman indices for calculation of Raman reflectance (RmcRo%), which is equivalent to vitrinite reflectance. The formula for calculating Raman reflectance indicative of organic maturation using Raman shift inter-peak interval (G-D) is RmcRo%=0.0537d(G-D)-11.21, which is mainly applicable to matured to highly matured carbonized samples of solid organics; The formula for calculating Raman reflectance indicative of organic maturation using Raman peak height ratio (Dh/Gh) is RmcRo%=1.1659h (Dh/Gh)+2.7588, which is mainly applicable to carbonized samples of solid organics that are over matured or going to be turned into granulated graphite. Preliminary applications indicate that Raman reflectance "RmcRo%" calculated based on results of Raman spectral analysis of solid organics can be used to characterize sample maturation at molecular level, so enjoying extensive prospects in geological applications.     

Late Paleozoic magmatism in South China:Oceanic subduction or intracontinental orogeny?

A gneissic granite with an U-Pb age of 313±4 Ma was found in northeastern Fujian Province,South China.It is an S-type granite characterized by high K2O,Al2O3 and low SiO2,Na2O contents with high A/CNK ratio of 1.22 for the whole rock.Zircons with stubby morphology from the gneissic granite yield 206 Pb/238 U ages ranging from 326 to 301 Ma with a weighted average age of 313±4 Ma,and negative εHf(t) values from -8.35 to -1.74 with Hf model ages (TCDM) of 1.43 to 1.84 Ga.This S-type granite probably originated from late Paleoproterozoic crust in intracontinental orogeny.Integrated with previous results on paleogeographic reconstruction of South China,the nature of Paleozoic basins,Early Permian volcanism and U-Pb-Hf isotope of detrital zircons from the late Paleozoic to early Mesozoic sedimentary rocks,we suggest the occurrence of a late Paleozoic orogeny in the eastern Cathaysia Block,South China.This orogenic cycle includes Late Carboniferous (340-310 Ma) orogeny (compression) episode and Early Permian (287-270 Ma) post-orogenic or intraplate extension episode.Therefore,the late Paleozoic magmatism in the southeastern South China probably occurred during the intraplate orogeny rather than the arc-related process.