摘要：The physical parameters of the subsurface from the environmental site investigation are important for geoscientists and engineers to understand and very low cost-effective method, especially when combined with geophysical (seismic) and geotechnical (borehole) surveys. These parameters can be estimated from other obtained parameters. In this study, P-wave velocities of materials (soils and rocks) are studied both in the laboratory and field measurement. The obtained P-wave velocities are then compared with the engineering parameters such N values, rock quality, friction angle, relative density, velocity index, density and penetration strength from boreholes. The empirical correlations were also found in this study for selected parameters. The estimation of engineering parameters from P-wave seismic velocity values is applicable for tropical environmental study. It is found that, the ratio (VFIELD/VLAB) when squared, was numerically close to the value of percentage RQD. We found that the empirical correlation for tropical environmental study is VP = 23.605(N) - 160.43 and the regression found is 0.9315 (93.15%). Meanwhile, the empirical correlation between P-wave velocities and RQD values is found as VP = 21.951(RQD) + 0.1368 and the regression found is 0.8377 (83.77%). The correlation between apparent P-wave velocities with penetration strength for both study sites are found as and the regression coefficient is found as 0.9756. Thus, this study helps for the estimation and prediction the properties of the subsurface material (soils and rocks) especially in reducing the cost of investigation and increase the understanding of the Earth’s subsurface characterizations physical parameters.

摘要：Present improvement design of rock scars puts safety first by only simply covering the scars with engineering materials and vegetation, has no outstanding artistic effects, or sightseeing and ornamental functions. This study highlighted new principles of the improvement design of rock scars, "respecting the nature, stabilizing slopes, choosing right trees for right land, economic and beautiful, as well as integration of particularity and harmonious beauty, artistic and functional attributes, innovative and artistic designs". On this basis, basic design concepts of the improvement design were given, the Silver Mountain of Liuzhou City was taken for an example to analyze local geologic conditions, present rock scars, climatic conditions, plant resources and vegetation growth on stone mountains, then further discuss concrete design techniques for the improvement of rock scars. The results showed that by combining engineering technology and landscape construction, safe and high-efficiency garden landscapes with rich layers, vivid and natural designs, and complete functions would be constructed, easily accepted by the people, and a good example set for the improvement design of rock scars in other regions.

摘要：背景:RhoA/rock信号通路在活体内关节软骨退变或者骨性关节炎的病理过程中是否发挥着作用,为此设计了该实验。目的:探索RhoA/rock信号通路在软骨退变过程中的作用。方法:采用家兔右膝关节伸直位制动模型,对制动2,4,6周及对照组家兔的右膝关节胫骨平台负重面全层软骨进行苏木精-伊红染色、番红O染色及RhoA、rock免疫组织化学染色,比较制动前后软骨组织学、病理积分及RhoA、rock表达变化情况。结果与结论:随着制动时间的延长,关节软骨退变程度逐渐加重,Mankin评分逐渐增加,且各组评分之间差异有显著性意义(P<0.05)。免疫组织化学提示RhoA、rock表达变化主要集中在切线层及中间层软骨,且二者在关节软骨退变过程中表达变化趋势一致,均为先增多后减少。结果表明,在关节软骨退变过程中,RhoA/rock信号通路表达先递增后逐渐降低,RhoA/rock信号通路在异常应力所致的关节软骨退变过程中发挥了效应。

摘要：By analyzing the abrasive theory of concrete diamond sawblade, the proposal that the diamond should be selected by its function in cutting concrete is presented. The part of the big grit diamonds cut rock, and the part of the small grit diamonds improve the wearability of the matrix. The contrast tests are done with different shapes of sawbaldes in split segment, slant "U" slot segment, sandwich segment, turbo segment and three-slot segment. The special shapes of sawblades can improve the effect of cooling and the removing ability of the rock powder. The data of tests show that the efficiency of cutting and the life of sawblades are improved by designing the diamond prescription and using the especial geometry of segment.

摘要：一个成功的校园营销活动,既要非常新颖,与社会关注的热点相结合,又要与企业的营销战略和品牌定位相吻合,还能真正触及大学生们的内心想法,不要有过于浓重的商业气息,只有这样,才能在真正把握学生兴趣点的同时,实现企业传播的目的。

摘要：Levi’s~是一种文化、一种态度乃至一种生活方式。Levi’s~rock Party高校原创先锋音乐大赛也正在以更加成熟的姿态诠释着大学音乐人的激情与理想。

摘要：It is important to calibrate micro-parameters for applying partied flow code(PFC)to study mechanical characteristics and failure mechanism of rock *** design method is firstly adopted to determine the microscopic parameters of parallel-bonded particle model for three-dimensional discrete element particle flow code(PFC3D).Variation ranges of microscopic of the microscopic parameters are created by analyzing the effects of microscopic parameters on macroscopic parameters(elastic modulus E,Poisson ratio v,uniaxial compressive strengthσc,and ratio of crack initial stress to uniaxial compressive strengthσci/σc)in order to obtain the actual uniform design *** calculation equations of the microscopic and macroscopic parameters of rock materials can be established by the actual uniform design table and the regression analysis and thus the PFC3D microscopic parameters can be quantitatively *** PFC3D simulated results of the intact and pre-cracked rock specimens under uniaxial and triaxial compressions(including the macroscopic mechanical parameters,stress−strain curves and failure process)are in good agreement with experimental results,which can prove the validity of the calculation equations of microscopic and macroscopic parameters.

摘要：潜在滑坡的识别涉及到多种因素间的相互作用和相互耦合,常规方法难以准确描述影响因素间相互耦合作用对斜坡稳定性的影响。结合前人的研究成果,引入岩石工程系统(RES)理论的交互作用矩阵构造和编码原理,提出了基于BP网络潜在滑坡识别模型,推导了在该识别模型下实现交互作用矩阵的编码及考虑多因素相互作用权重确定的流程,并将其运用于潜在土质滑坡判别中。研究结果表明:运用此识别模型,不仅能够实现对潜在滑坡识别,同时能够实现基于多因素交互作用影响的各识别指标权重的确定。

摘要：针对初始地应力的复杂性,基于某水电站引水发电区实测地应力资料建立了有限元数学模型,采用进化支持向量机和模拟退火算法反演计算了水电站调压室围岩的初始地应力场。结果表明,反演值与实测值较接近,满足设计要求,为围岩稳定计算提供了依据。

摘要：台阶法作为加强贴坡路堤稳定性的方法被广泛应用,而台阶的适用条件和台阶型式是其设计中的重点,对此相关设计规范中对此并无详细描述.结合高速公路建设实践,采用数值计算软件FLAC对岩质贴坡路堤的台阶设置进行模拟,通过对不同工况的岩质贴坡路堤稳定性计算,归纳总结出台阶的适用条件和台阶型式,计算结果显示:岩质斜坡地基上台阶设置主要针对滑动破坏为整体滑动和折线型滑动,对于圆弧形滑动,即填方内部破坏则影响不明显;在不同斜坡坡度下,岩质斜坡地基上填方路堤极限承载力随台阶宽度的加大而增加,挖台阶与否对其极限承载力的影响较大;台阶的宽度大于1m时,台阶宽度对其极限承载力影响不明显.