地勘单位经济运行中关键环节管理与执行力问题探讨

对地勘单位经济运行中的资金管理、成本管理、制度管理等三个关键环节的作用及运行状况进行分析,指出其运行过程中存在的三个共性问题,即制度不健全,经营机制不完善;成本管理滞后,经济效益不明显;资金管理不规范,经济运行质量不高。地勘单位经济运行执行力就是地勘单位实现经济运行目标的能力。提高地勘单位经济运行执行力的关键是解决经济运行中存在的问题,为此提出了建立健全制度、完善经营机制,强化资金管理、确保生产经营正常进行,加强成本管理、提高经济运行质量等对策和措施。探索地勘单位提升管理水平,增强管理执行力,推动煤田地质经济健康持续发展。     

高密度三维地震技术在潞安矿区高河煤矿的应用效果

对潞安矿区高河煤矿进行了高密度三维地震勘探试验,通过实验获得区内合理的采集参数,并在处理和解释中采用了多项关键技术,如分频剩余静校正迭代技术、叠前时间偏移技术、正演模型技术、三维可视化技术、属性体切片和彩色剖面联合技术等。高密度三维地震勘探解释结果与常规三维地震勘探解释结果的对比表明,高密度三维地震能够提高构造成像准确度和精度,避免误判,还可以提高下组煤层反射波的能量和连续性,是进一步提高潞安矿区三维地震勘探精度的有效技术手段。     

Last glacial terrestrial vegetation record of leaf wax n-alkanols in the northern South China Sea: Contrast to scenarios from long-chain n-alkanes

Long-chain n-alkanols and n-alkanes in core sediments from the northern South China Sea (SCS) were measured to make a comparison during terrestrial vegetation reconstruction from ~42 ka to ~7 ka. The results showed that terrestrial vegetation record from long-chain n-alkanes matched well with previous studies in nearby cores, showing that more C₄ plants developed during the Last Glacial Maximum (LGM) and C₃ plants dominated in the interglacial period. However, these scenarios were not revealed by terrestrial vegetation reconstruction using long-chain n-alkanols, which showed C₃ plant expansion during the LGM. The discrepancy during the interglacial period could be attributed to the aerobic degradation of functionalized long-chain n-alkanols in the oxygen-rich bottom water, resulting in poor preservation of terrestrial vegetation signals. On the other hand, the different advantages of functionalized n-alkanols and non-functional n-alkanes to record local and distal vegetation signals, respectively, may offer a potential explanation for the contradiction during the LGM when the SCS was characterized by low-oxygen deep water. Nevertheless, large variations on n-alkyl lipid compositions in C₃/C₄ plants could play a part in modulating sedimentary long-chain n-alkanols and n-alkanes toward different vegetation signals, thereby suggesting that caution must be taken in respect to the terrestrial vegetation reconstruction using long-chain n-alkanes and long-chain n-alkanols.     

An Improved Time Domain Approach for Analysis of Floating Bridges Based on Dynamic Finite Element Method and State-Space Model

The floating bridge bears the dead weight and live load with buoyancy, and has wide application prospect in deep-water transportation infrastructure. The structural analysis of floating bridge is challenging due to the complicated fluid-solid coupling effects of wind and wave. In this research, a novel time domain approach combining dynamic finite element method and state-space model (SSM) is established for the refined analysis of floating bridges. The dynamic coupled effects induced by wave excitation load, radiation load and buffeting load are carefully simulated. High-precision fitted SSMs for pontoons are established to enhance the calculation efficiency of hydrodynamic radiation forces in time domain. The dispersion relation is also introduced in the analysis model to appropriately consider the phase differences of wave loads on pontoons. The proposed approach is then employed to simulate the dynamic responses of a scaled floating bridge model which has been tested under real wind and wave loads in laboratory. The numerical results are found to agree well with the test data regarding the structural responses of floating bridge under the considered environmental conditions. The proposed time domain approach is considered to be accurate and effective in simulating the structural behaviors of floating bridge under typical environmental conditions.

     

加味痛泻要方联合穴位埋线治疗腹泻型肠易激综合征30例

目的：探讨加味痛泻要方联合穴位埋线治疗腹泻型肠易激综合征（IBS-D）肝郁脾虚证的临床疗效。方法：将60 例IBS-D患者随机分为治疗组和对照组,每组各30 例。治疗组予加味痛泻要方联合穴位埋线治疗,对照组予马来酸曲美布汀片治疗,治疗4周后比较2组患者的临床疗效及治疗前后中医证候积分、肠易激综合征症状严重程度量表（IBS-SSS）评分、肠易激综合征生活质量量表（IBS-QOL）评分、汉密尔顿焦虑量表（HAMA) 及汉密尔顿抑郁量表（HAMD）评分变化,检测2组患者治疗前后5-羟色胺（5-HT）、P物质（SP）、血管活性肠肽（VIP）、白细胞介素-6（IL-6）、白细胞介素-8（IL-8）及肿瘤坏死因子-α（TNF-α） 水平,以及不良反应发生率和复发率。结果：总有效率治疗组为93.33%（28/30）,对照组为63.33%（19/30）,2组比较,差异有统计学意义（P＜0.05）。治疗后2组患者中医证候积分,IBS-SSS、HAMA、HAMD评分均低于本组治疗前,IBS-QOL评分高于本组治疗前,且治疗组的改善程度更优（P＜0.05）。治疗后2组患者5-HT、SP、VIP、IL-6、IL-8、TNF-α 水平低于本组治疗前,且治疗后治疗组低于对照组（P＜0.05）。治疗过程中,不良反应发生率治疗组为6.67%（2/30）,对照组为3.33%（1/30）,2组比较,差异无统计学意义（P>0.05）。停药4周后对2组有效患者进行随访,治疗组的复发率为14.29%（4/28）,低于对照组的42.11%（8/19）,差异有统计学意义（P＜0.05）。结论：加味痛泻要方联合穴位埋线治疗IBS-D疗效确切,能够显著改善患者临床症状,缓解焦虑、抑郁状态,降低脑肠肽及炎性因子水平,且未见明显不良反应,值得临床推广。     

Simulating urban land-use change based on the multi-hierarchal planning–environment interaction process

Urban land-use change is the result of coupling interaction between planning and environment systems. The aim of our study was to construct an effective model to show how the urban land-use changes under the planning–environment interaction system with multi-hierarchy and major function oriented zoning. Combining the Cellular automata (CA) model with logistic regression model, the proposed multi-hierarchal vector CA model (MH-VCA3) was constructed by mining multi-hierarchal land-use transition rules under the planning–environment interaction system. Taking Jiangyin City (China) as an example, we compared the simulated result of the proposed model to those of the well-accepted Logistic CA and traditional multi-level CA models to demonstrate the effectiveness of the consideration of top-down decomposition constraint and bottom-up updating. Furthermore, by simulating the land-use changes under different population regionalization scenarios, we found that in order to form the spatial pattern of “agglomeration in the north and ecology in the south,” the planned population growth at the global hierarchal level should be allocated to the district units according to the law of Central district > Chengxi district > Chengdong district > Chengnan district > Chengdongnan district. The proposed model is expected to provide scientific support for the formulation of urban planning schemes in the future.     

Improvement of pseudo-static method for slope stability analysis

traditional In this paper, two drawbacks pseudo-static method （vertical of the slice method） in the slope stability evaluation have been studied. First, the sliding mass is divided into vertical slices according to this method, which is irrational to some extent in the seismic design of slope. Second, only peak ground acceleration （PGA） is considered, and the effects of shaking frequency and duration on slope stability are neglected. And then, based on the theory of elastic wave and the summarized geological model, this paper put forwards an improved method of pseudo-method by using the theory of elastic wave and Hilbert-Huang transform. The improved pseudostatic method gives reasonable considerations to the time-frequency effects of seismic wave and its rationality has been verified by the shaking table test. This method can evaluate the safety of a slope, the happening time and the scale of landslides. At the same time, this method also can improve the high accuracy of the evaluation of the safety of the slope.     

Temporal stability of apparent soil electrical conductivity measured by electromagnetic induction techniques

Assessing and managing the spatial variability of hydropedological properties are important in environmental,agricultural,and geological sciences.The spatial variability of soil apparent electrical conductivity（ECa） measured by electromagnetic induction（EMI） techniques has been widely used to infer the spatial variability of hydrological and pedological properties.In this study,temporal stability analysis was conducted for measuring repeatedly soil ECa in an agricultural landscape in 2008.Such temporal stability was statistically compared with the soil moisture,terrain indices（slope,topographic wetness index（TWI）,and profile curvature）,and soil properties（particle size distribution,depth to bedrock,Mn mottle content,and soil type）.Locations with great and temporally unstable soil ECa were also associated with great and unstable soil moisture,respectively.Soil ECa were greater and more unstable in the areas with great TWI（TWI 〉 8）,gentle and concave slope（slope 〈 3%; profile curvature 〉 0.2）.Soil ECa exponentially increased with depth to bedrock,and soil profile silt and Mn mottle contents（R2= 0.57）,quadratically（R2 = 0.47）,and linearly（R 2 = 0.47）,respectively.Soil ECa was greater and more unstable in Gleysol and Nitosol soils,which were distributed in areas with low elevation（〈 380 m）,thick soil solum（〉 3 m）,and fluctuated water table（shallow in winter and spring but deep in summer and fall）.In contrast,Acrisol,Luvisol,and Cambisol soils,which are distributed in the upper slope areas,had lower and more stable soil ECa.Through these observations,we concluded that the temporal stability of soil ECa can be used to interpret the spatial and temporal variability of these hydropedological properties.     

The Value of Practice-Based Knowledge

Increasing recognition of the value of practice-based or experiential knowledge in natural resource management justifies the creation of a new category of articles in Society & Natural Resources that we are calling Practice-Based Knowledge (PBK). The rationale for focusing on PBK is due to its key role in the emergence of hybrid governance institutions across state, market, and civil society, understanding the complexity of dynamic socioecological systems, recognizing the challenges of multiple knowledge systems and context-specific practices, embracing the power of informal institutions and civic science, and engaging debates on the growing prevalence of market-oriented conservation. The goal is to provide a dedicated space within the published, peer-reviewed literature for scholars, government officials, nonprofit managers, and engaged citizens to share experiences informed by practical action. Relevant and timely practice-based insights may improve understanding and management of social and ecological processes and systems, while also offering the potential to contribute to theory.     

县域尺度下能源产区能源消费碳排放强度空间分异——以陕西省榆林市为例

以能源产区陕西省榆林市的12个区县为研究单元,在Geo Da和Arc GIS等软件的支持下,结合趋势分析和空间统计方法,分析2005—2010年榆林县域尺度下的能源消费碳排放强度的空间格局特征与空间分异机制。榆林各区县能源消费碳排放强度水平差异明显,总体差异呈扩大趋势,两极分化加剧。县域碳排放强度南北走向上表现出逐渐减小趋势,东西走向上具有微弱的"U"型变化态势。总体上,东北部区县碳排放强度高于西南部。各区县碳排放强度具有正的空间关联分布特征,且处于低水平非均衡空间分布状态,空间依赖性明显。结合相关性分析,榆林区县碳排放强度具有极化区、扩散区、塌陷区和传染区4个特征。"热点"主要分布在东北部三县,"冷点"主要分布于南部六县。能源资源分布不均、经济总量以及产业结构差异是造成榆林碳排放强度空间分布不均的主要原因。