秦岭地区NDVI与地形因子的相关性分析

秦岭山区地形因子是影响植被分布的重要因素。选取2001、2009和2017年MODIS陆地产品MOD13Q1数据和DEM数据,从DEM中提取地形因子,高程、坡度和坡向,与MODIS的NDVI数据结合,分析了地形对秦岭地区植被空间分布影响。研究结果表明:(1)NDVI随着高程的增大而逐渐增大,在高程1800 m左右时达到最大值,随后又随着高程的增大而减小;(2)NDVI在坡度0°～5°间逐渐增大,在5°～40°呈稳定趋势,从40°开始缓慢减小,60°达到乔木能够生长的坡面倾角临界值,当坡面倾角大于60°时植被指数开始快速减小;(3)受太阳辐射的影响,坡向在NW 270°～360°,SE 240°～270°之间的植被长势较好,其余坡向上长势一般。     

耀变体在射电波段的偏振研究

利用UMRAO数据库22个耀变体源的偏振数据,根据Lazarian&Pogosyan理论模型分析研究了耀变体射电波段的偏振随波长的变化,得出不同类的耀变体偏振随波长变化的原因。结果表明,与Lazarian&Pogosyan理论模型吻合较好。由此得出如下结论:(1)反常去偏振耀变体源中反常法拉第旋光起主导作用,反常去偏振相对较少;(2)热辐射与同步辐射混合作用,高频波段的偏振度小于低频波段的偏振度(反常去偏振);(3)当被观测波段波长小于吸积盘热辐射对应的维恩波长时,高频波段的偏振度大于低频波段的偏振度(常规去偏振)。     

阿尔泰南缘东段变形岩石磁组构分析

磁组构是指岩石磁化率的各向异性,磁组构方法已经被广泛应用于构造变形分析。阿尔泰南缘东段地区岩石磁组构特征是磁各向异性度P值大,反映本区总体韧性剪切变形强烈。萨尔布拉克—科克萨依脆性劈理化带和玛因鄂博韧性剪压构造带的E>0占优势,磁面理发育,部分样品磁线理发育,反映变形以压扁变形为主,主压应力方向为NE(NEE)向,伴随弱的左行剪切;达拉维孜—阿热勒托别韧性流变构造带和锡泊渡—富蕴深层次变晶糜棱岩带E>0和E<0均存在,磁面理和磁线理均发育,反映以剪切变形为主;其中达拉维孜—阿热勒托别构造带主压应力方向为NE(NEE)向,为左行剪切,而锡泊渡—富蕴构造带主压应力方向为SN向,为右行剪切。在达拉维孜—阿热勒托别构造带中的哈腊苏铜矿和卡拉先格尔—老山口一带一些叠加蚀变矿化的强变形岩石的P值明显减小,说明在韧性变形之后发生过矿化热液作用导致磁化率各向异性发生了均一化。结合区域构造分析,可以认为萨尔布拉克—科克萨依构造带、达拉维孜—阿热勒托别构造带和玛因鄂博构造带构成一个完整的板块碰撞聚合带,而锡泊渡—富蕴构造带可能为在古生代期间被强烈改造的具有前震旦纪结晶基底的微大陆的残留(或断片)。     

渤海海峡跨海通道建设前后区际城市群物流网络结构的时空演变

随着网络社会不断崛起,城市空间内涵发生了明显改变,已经成为人文地理学研究的新的重要内容。通过改进重力模型,基于有向加权网络分析方法以及BRIM算法,探讨了渤海海峡跨海通道建设前后山东半岛城市群与辽中南城市群物流网络结构的演变过程,研究发现：①渤海通道建设主要影响城市低等级物流联系,对高等级网络的影响局部集中在辽中南南部和山东半岛东部且自身物流规模较大的城市之间,其中大连、沈阳以及青岛、烟台、潍坊、济南等少数重点城市之间垄断了大量的物流资源;② 通道建设促进了“双通道双向合成流”格局形成,在各自城市群内部,物流结构将出现陆、海方向上的分离性变化,大连、烟台作为通道门户城市的地位逐渐确立;③ 首位离心流、向心流格局在演变过程中均表现出渤海通道指向性,仅有沈阳⇄济南、沈阳⇄淄博、大连⇄青岛、鞍山⇄潍坊等少数城市之间保持了常态化互惠关系,但互惠程度并不对称,辽中南地区城市的物流输出规模普遍高于具有互惠关系的山东半岛城市,前者表现为典型的“双核-边缘”结构,后者具有多极网络化特征;④ 通道建设前后山东半岛城市群的物流城市类型保持稳定,辽中南地区的向心流主导型城市则不断向铁岭、抚顺、本溪等东北部城市蔓延;⑤ 大连在渤海通道建设后首次与烟台、青岛等山东半岛城市群东部城市实现了同一子群结构衔接,总体上优化了山东半岛与辽中南城市群的物流空间格局。     

Formation of saddle dolomites in Upper Cambrian carbonates, western Tarim Basin (northwest China): Implications for fault-related fluid flow

The saddle dolomites occur more intensely in cores closely to fault than that in cores far away from the fault in Upper Cambrian carbonate of western Tarim basin, suggesting that formation of the saddle dolomites is likely related to fault-controlled fluid flow. They partially fill in fractures and vugs of replacement dolomite. The saddle dolomites exhibit complex internal textures, commonly consisting of core and cortex. In comparison with the matrix dolomites, the saddle dolomites show lower Sr-content and ⁸⁷Sr/⁸⁶Sr ratios, higher Fe- and Mn-content, and more negative δ¹⁸O values. Combined with high Th (100–130 °C) of primary fluid inclusions, it is suggested that the saddle dolomites precipitated from hydrothermal fluid derived from the deep evaporite-bearing Middle Cambrian strata, and the magnesium source may be due to dissolution of host dolomite during hydrothermal fluid migration. Fault activity resulted in petrographic and geochemical difference of the core and cortex of the saddle dolomites. The cores precipitated from the formation water mixed by deep brines at the early stage of fault activity, and the cortexes precipitated from the deep fluid with higher temperatures through the Middle Cambrian later. In summary, the formation of the saddle dolomites implies a hydrothermal fluid event related to fault activity, which also resulted in high porosity in Upper Cambrian carbonate in western Tarim Basin.     

化瘀消异定痛汤联合穴位埋线治疗子宫内膜异位症30 例

目的:观察养阴散结法辅助化疗治疗晚期胃癌阴虚证的临床疗效。方法:将60 例晚期胃癌阴虚证患者随机分成治疗组和对照组,每组各30 例。对照组给予单纯化疗,治疗组在对照组基础上加服中药养阴散结方。治疗结束后,观察2组瘤体疗效、中医证候疗效、中医证候积分、生活质量（KPS）评分、化疗毒副作用及肿瘤标志物糖类抗原199（CA199）、糖类抗原125（CA125）、糖类抗原724（CA724）、癌胚抗原（CEA）、神经元特异烯醇化酶（NSE）、细胞角蛋白19片段（CYFRA21-1）等指标情况。结果：瘤体疗效总有效率治疗组为50.00%（15/30）,疾病控制率为90.00%（27/30）,对照组分别为43.33%（13/30）、86.67%（26/30）,2组比较,差异无统计学意义（P＞0.05）。中医证候疗效总有效率治疗组为76.67%（23/30）,对照组为36.67%（11/30）,2组比较,差异有统计学意义（P＜0.05）。治疗后2组中医证候积分较治疗前均有下降,且治疗组下降幅度大于对照组,差异均有统计学意义（P＜0.05）。生活质量方面,治疗后治疗组KPS评分高于治疗前,且高于对照组,差异均有统计学意义（P＜0.05）。毒副作用方面,治疗组Ⅲ~Ⅳ级骨髓抑制及消化道不良反应发生例数均少于对照组,差异有统计学意义（P＜0.05）。2组治疗后血清CA199、CA125、CA724、CEA、NSE、CYFRA21-1水平较治疗前均有下降,且治疗组血清CA199、CA125下降幅度大于对照组,差异均有统计学意义（P＜0.05）。结论：养阴散结法辅助化疗治疗晚期胃癌阴虚证患者疗效确切,可改善患者中医证候,提高生活质量,减少化疗毒副作用。     

面向稀疏散布数据集的时空Kriging优化

时空Kriging法通过将变异函数向时空域进行扩展得到时空变异函数,有效地利用时空邻近的采样点综合进行插值,由于时空稀疏散布数据集具有单一时刻下样本点数量少以及时空分布不规律的特点,难以满足使用时空Kriging插值法的基本条件,导致插值精度不高,据此本文提出了优化方法：通过多时段叠置拟合空间变异函数的方法,综合利用时空邻域内的采样点以解决单一时刻下空间邻域内数量不足情况;控制时间变异对空间变异函数拟合的误差影响;采用积合式模型构建时空变异函数进行插值。最后使用Argo海温数据进行插值实验,在相同条件下与时空Kriging法以及时空权重法的交叉验证结果对比得出,该方法在保证拟合所需采样点数量要求的同时,有效削减了一般时空Kriging法中时间变异对空间变异函数拟合结果的干扰,插值结果的绝对误差均值从0.5降低至0.2以内,稳定性进一步增强,改善了时空Kriging法在稀疏散布数据条件下精度上的不足。     

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?????????????????￡????ú?????????GPS Block IIR??M??????????????????????о??????????GM(1??1)??AR(p)??????????1???????????????1 ns????????10??????????????10 ns??????????????ζ??????GM??1??1???????????????????????IGS(the International GPS Service for Geodynamics)??????????7 ns??????     

Runoff change of Naoli River in Northeast China in 1955–2009 and its influencing factors

Runoff change and trend of the Naoli River Basin were studied through the time series analysis using the data from the hydrological and meteorological stations. Time series of hydrological data were from 1957 to 2009 for Bao′an station, from 1955 to 2009 for Baoqing station, from 1956 to 2009 for Caizuizi station and from 1978 to 2009 for Hongqiling station. The influences of climate change and human activities on runoff change were investigated, and the causes of hydrological regime change were revealed. The seasonal runoff distribution of the Naoli River was extremely uneven, and the annual change was great. Overall, the annual runoff showed a significant decreasing trend. The annual runoff of Bao′an, Baoqing, and Caizuizi stations in 2009 decreased by 64.1%, 76.3%, and 84.3%, respectively, compared with their beginning data recorded. The wet and dry years of the Naoli River have changed in the study period. The frequency of wet year occurrence decreased and lasted longer, whereas that of dry year occurrence increased. The frequency of dry year occurrence increased from 25.0%-27.8% to 83.9%-87.5%. The years before the 1970s were mostly wet, whereas those after the 1970s were mostly dry. Precipitation reduction and land use changes contributed to the decrease in annual runoff. Rising temperature and water project construction have also contributed important effects on the runoff change of the Naoli River.     

平顶山盐田勘探开发工作回顾与展望

该文对平顶山盐田的发现及地质勘探开发过程进行了简明扼要的综述。对前人地质工作作了评论,对目前地质勘探程度、盐田地质特征和开发利用现状进行了总结,对盐田今后发展方向进行了具体分析,指出了应采取的措施。