喜峰口—凌源成矿带金成矿条件及找矿远景

运用“矿源层－构造－岩浆岩三位一体”的找矿理论。叙述了喜峰口－凌源成矿带金成矿条件。划分了金矿类型，总结了成矿规律，提出了找矿远景区。     

河工动床模型存在问题及其解决途径

河工模型是解决江河治理及大型水利水电工程泥沙问题的主要手段。本文研究了河工动床模型设汁与试验过程中存在的几何变态、推移质泥沙级配选配、时间变态等问题,并提出了相应的解决途径和建议。     

西北干旱区野生植物及野生药材资源保护中的资源法规分析

西北地区野生药材资源和野生植物资源的滥采乱挖不仅引起了资源的迅速衰竭，而且还破坏了当地的草地资源，区域的生态环境也随之渐趋恶化。从产权制度、许可制度、保护制度等资源法律制度入手分析了滥采乱挖屡禁不止的主要原因，并进而提出了加强资源法制建设的多种途径和对策：（1）完善资源产权制度，实现资源产权的具体化、实体化；（2）依法行政，实现资源开发利用和经营的法制化管理；（3）重新审视资源的价值，合理确定资源的保护级别；（4）加强资源法制宣传，提高群众的法律意识。     

西安南郊春季土壤碳释放研究

本文根据NaOH溶液吸收CO2的原理，对西安长延堡春季土壤CO2释放量进行了观测，对土壤CO2释放规律及其影响因素进行了探讨。资料表明，从春季的3月到5月，不同植被下土壤CO2释放量均呈增加的趋势；植被对土壤CO2释放量有一定影响，植被发育好，土壤CO2释放量大；从当日早晨到次日早晨，土壤CO2释放量呈现由低到高再到低的变化规律；土壤CO2释放量变化相对于气温的变化具有滞后性，表明土壤CO2释放量变化是受土壤温度制约的。     

震前电磁波异常特征探讨

介绍了电磁波观测的原理与方法,归纳出震前电磁波的几种异常特征,对近年来几次典型的震前电磁波异常进行了分析,探讨了异常的规律。     

论地幔波震级：—CDSN应用系列论文四

收集了1977—1990年间用 CMT 方法测定的地震矩 M_0和 NEIC 测报的面波震级 M_s 及1900—1976年间一些巨大地震的 M_0、M_s数据,得到 M_s与 lgM_0之间线性—非线性—M_s 最终达到饱和的图象。利用合理的地震运动学模型所相应的地震定标律可以深刻揭示该图象的物理本质。矩震级M_W 与特大地震的 M_s 趋势相一致,表征高于拐角频率时远场位移谱与地震矩 M_0之间的定量关系。本文基于面波的激发和传播理论,提出了测定地幔波震级 M_m 的新方案,并用 CDSN-LPZ 信道中的面波资料测定了1987—1990年间全球 M_s6.6以上浅源大地震的 M_m;同时对 Okal 和 Talandier(1989)的测定结果作了校正。结果表明,这样测定的地幔波震级与中小地震的 M_s 趋势相一致,表征低于拐角频率时远场位移谱与地震矩 M_0之间的定量关系。     

Some results from phytoplankton counting intercalibrations

Phytoplankton samples from 7 different lakes were processed in 2 intercalibration series using Utermöhl's sedimentation method. Total biomass volumes obtained by most of the investigators give reliable results in respect to the mean. Numbers of individuals and mean volumes of selected species obtained by the different participants were compared and show larger variations than the overall results. Therefore a certain delimitation of particular sources of errors was tried in the 2nd intercalibration series by giving recommendations for the different steps of the whole procedure.     

基坑深层水平位移曲线分析研究

深层水平位移监测是基坑监测的重要组成部分。本文介绍了基坑深层水平位移监测的工作原理,通过基坑监测工程实例,分析研究了围护结构和土质边坡条件下实测的深层水平位移曲线。研究结果表明,曲线的变形机制与围护结构、工程地质条件有密切的关系,对今后类似的监测和资料分析具有参考意义。     

Different Summer Rainfall Anomaly Patterns in Northeast China Associated with Two Kinds of El Niño Events

The relationship between summer rainfall anomalies in northeast China and two types of El Ni?o events is investigated by using observation data and an AGCM. It is shown that, for different types of El Ni?o events, there is different rainfall anomaly pattern in the following summer. In the following year of a typical El Ni?o event, there are remarkable positive rainfall anomalies in the central-western region of northeast China, whereas the pattern of more rainfall in the south end and less rainfall in the north end of northeast China easily appears in an El Ni?o Modoki event. The reason for the distinct differences is that, associated with the different sea surface temperature anomalies (SSTA) along the equatorial Pacific, the large-scale circulation anomalies along east coast of East Asia shift northward in the following summer of El Ni?o Modoki events. Influenced by the anomalous anticyclone in Philippine Sea, southwesterly anomalies over eastern China strengthens summer monsoon and bring more water vapor to Northeast China. Meanwhile, convergence and updraft is strengthened by the anomalous cyclone right in Northeast China in typical El Ni?o events. These moisture and atmospheric circulation conditions are favorable for enhanced precipitation. However, because of the northward shift, the anomalous anticyclone which is in Philippine Sea in typical El Ni?o cases shifts to the south of Japan in Modoki years, and the anomalous cyclone which is in the Northeast China in typical El Ni?o cases shifts to the north of Northeast China, leading to the “dipole pattern” of rainfall anomalies. According to the results of numerical experiments, we further conform that the tropical SSTA in different types of El Ni?o event can give rise to observed rainfall anomaly patterns in Northeast China.     

高含冰量冻土路基融化固结规律研究

为了研究高含冰量冻土路基的融化固结规律，在线性大变形融化固结理论的基础上引入非线性本构关系，并运用分段插值法实现了孔隙比与压缩模量之间的非线性关系，完善了三维大变形融化固结数值模拟方法。在此基础上结合青藏公路实测数据验证了其合理性。研究结果表明，采用非线性应力?应变关系的大变形融化固结理论能够显著提高高含冰量冻土路基的沉降计算精度，并能够进一步合理描述热学场和力学场的相互叠加影响。冻土融化固结度受有效融化固结时间以及特征排水长度等因素的影响呈现出完全不同于融土路基的发展规律，即在路基运营初期其融化固结度上升，随着时间发展，其固结度在达到峰值后持续降低，这主要是由于融化深度持续增大后所引起的特征排水长度的增加和有效融化固结时间的缩短所造成的。因此，在计算高含冰量冻土路基稳定性设计指标时，应采用非线性应力?应变关系来进一步提高融化深度、沉降以及固结度等指标的计算精度。