癌症与土壤环境中钡元素的关系

利用土壤环境中钡元素资料７６９ 个数据，癌死亡调查资料７８７ ０８０ 例，研究了胃癌、食管癌、肝癌、宫颈癌、肺癌、大肠癌、白血病、鼻咽癌、乳腺癌死亡率与人群生存区土壤环境中钡元素的关系。结果表明，肺癌、大肠癌、鼻咽癌、乳腺癌死亡率与钡元素有相关性，等级相关系数分别为－０．５７２４（ｐ ＜ ０ ．００１） ，０．３１０３（ｐ ＜ ０ ．０５） ，－ ０ ．４１７７（ｐ ＜ ０．０２５），０ ．３７７３（ｐ ＜ ０．０２５）。     

中国癌症与土壤环境中碘元素的关系

利用土壤环境中碘元素资料769个数据,癌症死亡调查资料787 080例,研究了胃癌、食管癌、肝癌、宫颈癌、肺癌、大肠癌、白血病、鼻咽癌、乳腺癌死亡率与人群生存区土壤环境中碘元素的关系.结果表明,胃癌、食管癌、肝癌、宫颈癌、鼻咽癌死亡率与碘元素有相关性.     

中国土壤中化学元素与宫颈癌的相关性研究

本文利用中国土壤元素资料2 069 448个数据,宫颈癌死亡调查资料119 760例,研究了宫颈癌死亡率与人群生存的土壤环境中As、Cd、Co、Cr、Cu、F、№、Mn、Ni、Pb、Se等64个元素的相关性.结果表明,宫颈癌的发病率与土壤环境中化学元素的含量具较强的相关性.     

中国大肠癌与土壤环境中元素的相关性研究

利用土壤元素资料2069448个数据,大肠癌死亡调查资料42480例,研究了大肠癌死亡率与土壤环境中砷、镉、钴、铬、铜、氟、汞、锰、镍、铅、硒、钒、锌、锂、钠、钾、铷、铯、银、铍、镁、钙、锶、钡、硼、铝、镓、铟、铊、钪、钇、镧、铈、镨、钕、钐、铕、钆、铽、镝、钬、铒、铥、镱、镥、钍、铀、锗、锡、钛、锆、铪、锑、铋、钽、碲、钼、钨、溴、碘、铁等61个元素的相关性.结果表明.砷、钒、铯、铊、铀、锑元素与大肠癌死亡率有相关性.等级相关分数分别为-0.5123(p＜0.005),-0.3179(p＜0.05),-0.3190(p＜0.05),-0.4552(p＜0.01),-0.4857(p＜0.005),-0.3232(p＜0.05)     

江西省白血病与地形地貌类型的关系

通过对地形地貌资料4502个数据，白血病死亡调查资料2239例，研究了白血病死亡率与人群生存区的地形地貌类型（山区、丘陵、岗地、平原）的相关性。结果表明，山区、岗地、平原与白血病死亡率有明显的相关性，等级相关系数分别为-0．1963（P＜0．05），0．2925（P＜0．0025），0．3122（P＜0．0025）。     

肝癌与地形地貌类型关系初探

文章利用地形地貌资料４５０２个数据，肝癌死亡调查资料８３４３例，研究了肝癌死亡率与人群生存的地形地貌类型的相关性。在此基础上综合评价了与肝癌有相关性的地形地貌类型对肝癌产生和发展的影响     

江西省胃癌与岩石类型

本文利用岩石类型资料1092个数据,胃癌死亡调查资料10295例,研究了胃癌死亡率与人群生存区岩石类型(岩浆岩、变质岩、碳酸盐岩、碎屑岩、红色碎屑岩、第四系松散物)的相关性。在此基础上,综合评价了与胃癌有相关性的岩石类型,及其对胃癌产生和发展的影响。研究方法可供参考。     

浙江省恶性肿瘤的环境地球化学研究

利用区域地球化学资料开展浙江省恶性肿瘤的地球化学环境影响因素的研究。恶性肿瘤标化死亡率受地球化学综合因素影响．应用微量元素对各类恶性肿瘤标化死亡率的相关阵和逐步回归方程定量地研究各类恶性肿瘤与地质环境中微量元素的关系。胃癌、肝癌、肺癌、肠癌、食管瘤、白血病与铁族元素及Ba、Zr、Mo的背景密切相关，宫颈癌、鼻咽癌、乳腺癌与Cu、Pb、Zn元素的背景相关，稀土元素对恶性肿瘤有压抑作用。浙江省恶性肿瘤的流行受区域地质构造控制和地球化学环境制约，具明显地域性分布特征。     

浅析土壤理化性质对元素迁移转化的影响

相同含量的元素在不同理化性质(土壤的酸碱度、有机质等)的土壤中,可表现出完全不同的地球化学行为,从而影响元素的转化和作物对元素的吸收。本文通过分析土壤与农作物介质中元素的生态地球化学效应,对根系土-玉米籽实、根系土-小麦籽实之间元素的迁移转化影响因素进行了研究,发现有机质、酸碱度与土壤中各元素之间有一定的相关性,其成果对于区域土壤地球化学资料在农业营养施肥、环境质量评价等方面具有重要的指导意义。     

多元统计在化探数据分析中的应用——以沂源县鲁村镇崮山村地区土壤化探测量为例

地球化学元素的多元统计分析可以推测地球化学元素在复杂的成矿过程中的组合及演化特征,从而为预测找矿提供有用的微观信息。应用多元统计方法,对沂源县鲁村镇崮山村地区土壤、岩石地球化学测量数据进行研究分析,得出:与中国东部岩石丰度对比,研究区岩石背景特征为Au,Ag,Pb,Sb,As,Hg元素富集,Cu,Zn贫化;与山东省土壤背景值对比,研究区土壤背景值中Au,Ag,Cu,Pb,Zn元素都出现了不同程度的富集。区内成矿元素组合特征表现为:Ag,Pb,Zn元素之间相关性较强,其中Ag、Pb元素之间的相关性最强,反应出了组合成矿的可能性;而Au与其他元素几乎不具相关性,Cu元素与Ag,Pb,Zn元素均具有弱相关性。通过因子分析得出成矿元素的富集与矿化过程大致可以划分3个阶段:Ag-Pb-Zn元素组合的富集与矿化;Cu元素的富集与矿化;Au元素的富集与矿化;反映出了该区多期富集或蚀变矿化特点。利用因子得分圈定元素组合异常,通过异常分析,并结合地质背景、地质构造特征,最终圈定找矿有利靶区,为进一步找矿提供了科学依据。     

加速度计及其融合高采样GNSS的低频信号测量特性研究

搭建了一套振动台系统，模拟不同频率振动信号对加速度计进行测试，并从信号功率谱密度和积分位移2个方面对其低频测量特性进行分析。实验表明，当振动信号频率高于0.05 Hz时，对加速度计信号进行高通滤波并积分能够恢复出较准确的振动位移；反之，随着信号频率的降低，积分位移误差增大。因此，为解决加速度计低频测量能力不足的问题，利用高采样GNSS与加速度计数据融合的方法，成功恢复了极低频振动信号。研究表明，振动台系统能够为地震监测研究提供良好的基础平台；加速度计准确恢复位移信号的低频下限在003~0.05 Hz左右，研究方法及结果可为加速度计频带的合理选择提供参考；同时，利用高采样GNSS与加速度计融合方法能够有效弥补加速度计低频测量能力不足的缺点，使地震低频位移更加准确可靠。     

Synergetic Analysis and Possible Control of Vortex-Induced Vibrations in a Fluid-Conveying Steel Catenary Riser

This work aimed to demonstrate possibilities for both active and passive control of the vortex-induced vibration and fatigue life of steel catenary risers via an analysis of the self-organization and evolution of the structural vibration based on synergetic theory. An analysis of the complex interrelated and synergistic relationship between the order parameter and the fast variable was performed, and the master equation of the nodal displacements was established as the order parameter for the evolution of the riser’s structural vibration. Passive control methods include modifying the structure’s elastic modulus, the internal fluid velocity, the top tension and the structural damping ratio, while an active control involves adjusting the external flow rate. Optimized parameters were obtained by analyzing the non-steady state solution of the master equation. The results show that the fatigue life greatly increases as the riser’s elastic modulus decreases. In contrast, the fatigue life decreases with an increase of the internal fluid velocity. With an increase of the top tension, the vibration amplitudes and the number of modes may decrease, resulting in fewer bending stress cycles and a longer fatigue life. Furthermore, the structural damping ratio should be as large as possible. Finally, an active and passive control of the riser structure’s response to vortex-induced vibration and its fatigue life can be achieved by carefully modifying the parameters mentioned above. The results may provide a theoretical framework for engineering practice concerning the design and control of steel catenary riser structures which are affected by vortex-induced vibration.     

Permanent displacement models of earthquake-induced landslides considering near-fault pulse-like ground motions

The permanent displacement of seismic slopes can be regarded as an effective criterion for stability estimation. This paper studied the characteristics of permanent displacements induced by velocity pulse-like ground motions and developed an empirical model to readily evaluate the stability of seismic slopes in a near-fault region. We identified 264 velocity pulse-like ground motions from the Next Generation Attenuation(NGA) database using the latest improved energy-based approach. All selected ground motions were rotated to the orientation of the strongest observed pulse for considering the directivity of the pulse effect, so that the most dangerous condition for slopes was considered. The results show the velocity pulse-like ground motions have a much more significant effect on permanent displacement of slopes than non-pulse-like ground motions. A regression model based on a function of peak ground velocity(PGV), peak ground acceleration(PGA) and critical acceleration(ac), was generated. A significant difference was found by comparing the presented model with classical models from literatures. This model can be used to evaluate the seismic slope stability considering the effects of nearfault pulse-like characteristics.     

地震动触发滑坡体滑动的机理

论证并探讨了地震动触发滑坡体滑动的机理,认为地震时的坡体波动振荡在斜坡岩土体变形破坏过程中产生三种效应：累进破坏效应、启动效应和启程加速效应,并得出了一些既有理论研究意义,又有一定实际应用价值的论断。     

Propagation characteristics of vibration waves induced in surrounding rock by tunneling blasting

The effect of blasting vibration waves on surrounding rock and supporting structures is an important field in underground engineering. In this paper, the separation variable method is used to solve the displacement potential function for the propagation of the blasting vibration waves. In the axis coordinate system, the particle motion and stress change with axial distance, radial distance and time is obtained in surrounding rock. The peak particle velocity law in surrounding rock under different blast loads and surrounding rock parameters is discussed. In addition, the particle vibration characteristics in the surrounding rock are studied using numerical simulations method. The results shows that the peak particle velocity in surrounding rock appears negative exponent attenuation with the increase of axial distance, but it appears positive and negative fluctuations in radial direction. This phenomenon is a new discovery and it has been rarely investigated before. Moreover, the peak particle velocity attenuates more quickly and intensely in the near blasting field, which means that the supporting structure in a shorter distance away from the heading face is vulnerable to the impact of blasting vibration. The attenuation of blasting vibration velocity is closely related to charge length, blasting load amplitude, attenuation index and rock elastic modulus. The numerical simulation accomplishes the same results and then demonstrates the validity of theoretical results.     

单位矢的变率及其在运动学中的应用

本文首先推导出单位失变率的矢量表示式．然后将该式应用于惯性系运动学问题，以球坐标系为例导出了曲线坐标系中速度、加速度的分量表示式，导出了自然轴系中切向加速度和法向加速度的表示式．最后将该式应用于非惯性系运动学问题，在导出绝对变本与相对变率关系的基础上，进而得出绝对运动与相对运动的关系．显示出此种方法在研究运动学问题时的优越性．     

天山博罗霍洛地区构造与演化

天山博罗霍洛地区构造是以中—上元古界为主体组成的赛里木地块为核部,以古生界为两翼的复式背斜构造为骨架,以两翼的扇形逆冲断裂推覆构造十分发育为特征。总结其演化历史,可归纳为:早元古代古陆壳的形成;中—晚元古代稳定型大陆边缘的发育;早古生代大陆裂谷作用;晚古生代活动大陆边缘的形成与造山;中—新生代断块升降、滑脱推覆构造叠加、改造、而形成极其复杂的构造形态。