黔南州河(湖)长制推行的成效、问题和对策探讨

河(湖)长制是实现生态文明建设的重要方针政策,也是新时期国家水治理体系的机制创新。贵州省黔南布依族苗族自治州积极响应国家号召,通过采取高位推动、制度配套、管理创新等方式,有效推进了河(湖)长制工作,并取得了阶段性成效,但实践中依然存在治理能力不足、生活污水处理设施不完善、农村生活垃圾治理滞后、重点流域污染治理形势严峻、信息化监管能力不足及群众参与度不高等问题。本文对黔南州河(湖)长制工作取得的成效和存在的问题进行了阐述,在此基础上,提出强化责任落实、加快基础设施建设、加强重点流域污染治理、提升信息化监管和加大宣传引导等对策建议,尽快补齐河(湖)长制工作短板,更好地推进生态文明建设进程。     

GPS(RTK)技术在宁东能源化工基地供水工程测量中的应用

1概述全球定位系统(GPS)已广泛应用于各行各业,最初GPS主要涉及控制测量和大地测量,但随着测绘新技术的不断发展,尤其是实时动态(RTK)技术的不断发展和完善,使其不仅具有全天候,通视条件要求低的特点,而且观测时间短,实时提供精确坐标。因此,这一技术在线路工程测量、施工放样、测绘大比例尺地形图方面有了精度保证,得到了广泛应用。     

GM(1,1)、GM(1,N)联合模型在建筑物沉降预测中的应用

鉴于GM(1,N)模型预测精度高及GM(1,1)所需统计数据数量少的优点,通过自相关理论,把GM(1,1)和GM(1,N)两者有机结合形成一个联合模型,以进一步提高灰色模型的预测精度.该文在沉降资料的基础上,利用该联合模型对南京-泵站的沉降进行了分析预报,其结果与回归模型和GM(1,1)模型进行了比较,最后得出了基于自相关理论的GM(1,1)、GM(1,N)联合预测模型,其精度可靠,可信度高,预报结果也与实际情况相吻合,从而证明了该方法在实际工程中的可行性.     

关于引黄工程中埋涵（管）防止渗漏的探讨

埋涵（管）虽在引黄工程中所占比例有限，但作为线路上的重要一环，其作用不容忽视。一旦渗漏造成破坏，将导致全线运行的瘫痪。为此，笔者就如何防止埋涵（管）的渗漏问题进行了探讨。     

BOOTSTRAP SAMPLING IS WITH REPLACEMENT: A COMMENT ON AYLLÓN ET AL. (2011)

The bootstrap can be used to estimate confidence intervals for complex statistics such as weighted usable area, the habitat index calculated by the Physical Habitat Simulation System (PHABSIM) and related models. Use of the bootstrap entails sampling with replacement from the original sample, such as a set of PHABSIM transects. Because the method has been improperly applied to PHABSIM transects in several instances, I explain in detail why bootstrap sampling is with replacement. Copyright © 2011 John Wiley & Sons, Ltd.     

Biofiltration of H(2)S with reclaimed water as a nutrient/moisture source at loading rates from 10 to 300 g H(2)S m(-3) h(-1)

A biofilter was evaluated with two different media under field conditions using reclaimed water as a nutrient source. Evaluation with a single medium demonstrated that H(2)S could be efficiently removed at volumetric loading rates of up to 200 g H(2)S m(-3) h(-1). After an extended period of high loading rates, the performance began to deteriorate at loading rates greater than 150 g H(2)S m(-3) h(-1) possibly due to nutrient limitations. The reclaimed water served as a nutrient source even though the primary form of nitrogen was nitrate. The reclaimed water successfully supplied nutrients at the majority of loading rates observed in the study and this was verified by stoichiometric calculations. The biofilter was converted to a dual media filter and consistent performance was also observed with the dual media filter at loading rates up to 150 g H(2)S m(-3) h(-1). The biofilter was successfully operated at loading rates higher than previously reported under field conditions. The use of nitrate in reclaimed water as a nitrogen source was successful and demonstrated the potential to eliminate the need for a separate nutrient source at a water reclamation plant.     

基于GM(1,N)模型的工程价格指数灰色预测

文章首先简要介绍了灰色预测方法GM（1，N）模型的构造步骤及检验方法。然后将工程价格总指数作为表征系统特征序列．将人工费、木材、水泥、地方材料、杌械使用费作为相关因素序列．建立了黑龙江省工程价格指数预测GM（1，N）模型，经检验该模型的预测、模拟精度等级属于1级，能够准确预测工程价格指数。