A new species of Lataxiena Jousseaume, 1883 (Gastropoda: Muricidae) from the East and South China Seas     

张素萍  张树乾 《中国海洋湖沼学报》2015,33(2):506-509

A new muricid gastropod species,L ataxiena lutescena sp. nov.,is described and illustrated. The new species was recognized during reidentification of the Muricidae collection in the Marine Biological Museum,Chinese Academy of Sciences,Qingdao. The specimens of the new species were collected from the East and South China Seas off Fujian,Guangdong,and Hainan Provinces. Lataxiena lutescena sp. nov. is similar to Lataxiena blosvillei(Deshayes,1832) in general shape,but can be distinguished from the latter by the shell sculpture and radular characteristics. Lataxiena lutescena sp. nov. also resembles Lataxiena bombayana(Melvill,1893),but differs from that species in the shell shape and anal notches and in lacking short spines on the shell.  相似文献   

Descriptions of three new species of Mitridae （Mollusca： Gastropoda） from South China Sea     

李宝泉张素萍  李新正 《中国海洋湖沼学报》2005,23(1):121-125

Three new species of Family Mitridae （Mollusca： Gastropoda） from the South China Sea are described in the present paper. They are Ziba aglais sp. nov. B. LI ＆ S. ZHANG, Neocancilla daidaleosa sp.nov. B. LI ＆ X. LI, and Mitra holkosa sp. nov. B. LI. Their systematic positions are also discussed.  相似文献   

淮南张集煤矿层滑构造分类及形成机制探讨     

解国爱  姚素平  王光扣  张国明  邱志诚 《大地构造与成矿学》2013,37(1):11-19

通过淮南煤田张集井田层滑构造的具体表现形式分析,对层滑构造进行了系统分类。根据层滑构造的表现形态分为揉皱型和断裂型两种基本类型,根据不同层滑构造的组合形态又可分为书斜式、垒堑式、阶梯状和"y"与反"y"字形等,并采用物理模拟方法对不同层滑构造类型进行了实验研究。运用镜质体的反射率各向异性恢复了矿区构造应力场,张集井田中生代以来至少受到两期构造应力场作用,NWW-SEE方向的拉伸是形成张集井田层滑构造的主要力学机制。  相似文献   

基于环境一号卫星影像的淮南潘集采煤塌陷积水区富营养化评价     

裴文明  董少春  姚素平  徐翀  陈永春 《煤田地质与勘探》2013,(5):49-55

通过研究淮南潘集杨庄采煤塌陷积水区水体水质指标与环境一号卫星影像4个波段反射率值之间的关系,针对叶绿素、透明度、总磷、总氮、高锰酸钾指数5项主要水质参数建立了遥感监测模型。采用综合营养状态指数法,评价了该地区水体整体水质富营养化程度。评价结果表明,该塌陷积水区水体为轻度—中度富营养化,与实测水样分析监测的结果基本吻合,证明了水质遥感模型反演技术在当地水质监测中的适用性和可靠性,为实现该地区水质动态监测与预警提供了技术支持。  相似文献   

Contamination assessment of copper,lead, zinc and chromium in dust fall of Jinan,NE China     

Suping Feng  Hanchao Liu  Nannan Zhang  Hai Lin  Xiaolin Du  Yongli Liu 《Environmental Earth Sciences》2012,66(7):1881-1886

To assess the pollution of heavy metal in dust fall, nine dust fall samples were collected during the heating period and non-heating period from Jinan, a city in northeastern China. The samples were analyzed for Cu, Pb, Zn and Cr and the contamination level of heavy metals was assessed on the basis of the geo-accumulation index (I _geo). The results indicated that all of the four investigated metals accumulated significantly in the dust fall of Jinan, and the metal concentrations were much higher than background values. During the heating period, the mean values for Cu, Pb, Zn and Cr in the dust fall were 354.9, 688.5, 2,585.5 and 478.6 mg kg⁻¹. During the non-heating period, the mean values for Cu, Pb, Zn and Cr in the dust fall were 228.2, 518.2, 1,933.9 and 96.3 mg kg⁻¹, respectively. The I _geo values calculated based on background values revealed that the contamination level of heavy metal in the dust fall ranges from moderately contaminated to heavily contaminated, and it mainly originates from traffic and industry. In this work, the dust fall residue compared to the standard reference was also chosen as the background value to calculate the I _geo value. This method is useful for situations in which the background value is difficult to obtain.  相似文献   

Water inrush and environmental impact of shallow seam mining   总被引：2，自引：1，他引：2  

Jincai Zhang  Suping Peng 《Environmental Geology》2005,48(8):1068-1076

Shallow seam mining is very common in China for enhancing coal recovery. However, this may cause a series of severe problems in environment and mining safety in some cases, because the alluvium aquifers are directly above the shallow coal seams. Some typical water and sand inrush incidents resulting from shallow mining in China are analyzed. Based on in-situ observation, the mining-induced strata failures are investigated. The height of the fractured zone decreases as the size of the outcrop pillar or mining depth decreases. The spatial distributions of the failure zones in the shallow mining have specific features compared to the deep mining. These provide an advantageous condition for the shallow mining under alluvial aquifers. Optimal designs for outcrop pillar sizes are also given in different hydrogeological conditions for environment friendly and production-safe mining at shallow depths. According to in-situ mining experiments in several coalfields, technical measures for shallow mining are presented. These primarily include the lift mining for thick seams and reduction of the thickness of extraction in the first lift, short-wall mining, and detection of faults and other potential hazards prior to mining.  相似文献   

温特斯法在夏季温度预测中的应用   总被引：1，自引：0，他引：1  

常军  李祯  李素萍 《气象科技》2005,(Z1)

温特斯法可以对具有随机性、线性、季节性变化的时间序列进行预测,用温特斯法作了一次温度预测尝试。依据温特斯法的基本理论及3个平滑方程的递推公式、初始值公式和预测模型公式,将夏季6、7、8月的月平均温度看作具有随机性、线性、季节性变化的时间序列,应用温特斯法建立了河南省5个代表站夏季温度预测模型,并对2000~2004年夏季温度进行试报,得到了较好的预测结果,平均预测准确率(TS)为75%,此方法可作为预测气温的一种方法,在业务预报中应用。  相似文献   

信号（直流）接地方案     

李毓富  牛永波等 《山西气象》2001,(3):46-49

本文从电磁干扰到电磁兼容等方面，阐述了信号（直流）接地在计算机系统中的重要性，介绍了多点接地、单点接地在电磁兼容、防雷要求上存在的差异。根据综合接地示意图，并结合自己多年工作实际提出了一种计算机系统信号（直流）接地方案。  相似文献   

山东酷热天气统计特征分析   总被引：3，自引：1，他引：3  

杨成芳  龚佃利  张苏平 《气象》2003,29(9):28-33

利用统计方法对山东1951～2002年的酷热天气进行了分析，发现山东的酷热天气主要出现在鲁西、鲁北和鲁南；酷热天气在5～8月均可出现，主要集中在6～7月；有明显的年际变化，20世纪50～70年代前期酷热天气频繁发生，且强度较强。小波分析表明主要存在4年和10年左右的周期。西风带暖脊是造成山东酷热天气的主要天气形势，其次是副热带高压；酷热日与前期炎热日关系密切；850hPa温度场上郑州附近的24℃暖中心有很好的指示意义。  相似文献   

青藏高原北部巴颜喀拉构造带基底隆起的地震学证据   总被引：9，自引：2，他引：9  

李秋生  彭苏萍高锐 范景义 《地质通报》2003,22(10):782-788

过去曾笼统地认为巴颜喀拉构造带上万米的堆积主要是三叠系的复理石沉积。通过对沱沱河-格尔木深地震剖面资料的再认识发现，巴颜喀拉构造带的结晶基底埋深仅5km左右，比金沙江断裂带以南的羌塘地块北缘和昆仑山南缘的基底埋藏深度都要浅。进一步对青藏公路以东横穿巴颜喀拉构造带的几条深地震测深剖面进行分析，发现该基底隆起一直顺构造走向延伸，向东贯穿了整个构造带，推测它是扬子古陆块的残余。  相似文献