Regional Integrated Meteorological Forecasting and Warning Model for Geological Hazards Based on Logistic Regression

Information model is adopted to integrate factors of various geosciences to estimate the susceptibility of geological hazards. Further combining the dynamic rainfall observations, Logistic regression is used for modeling the probabilities of geological hazard occurrences, upon which hierarchical warnings for rainfall-induced geological hazards are produced. The forecasting and warning model takes numerical precipitation forecasts on grid points as its dynamic input, forecasts the probabilities of geological hazard occurrences on the same grid, and translates the results into likelihoods in the form of a 5-level hierarchy. Validation of the model with observational data for the year 2004 shows that 80% of the geological hazards of the year have been identified as ＂likely enough to release warning messages＂. The model can satisfy the requirements of an operational warning system, thus is an effective way to improve the meteorological warnings for geological hazards.     

Epitaxial growth of single-crystalline Ni46Co4Mn37In13 thin filmand investigation of its magnetoresistance

Single-crystalline thin film of Ni46Co4Mn37In13alloy grown on MgO(0 0 1) was prepared by Pulsed Laser Deposition(PLD) method. The epitaxial growth process was monitored by in situ Reflection High Energy Electron Diffraction(RHEED). Structure measurements reveal that the single-crystalline Ni46Co4Mn37In13film could be stabilized on MgO(0 0 1) as a face-centered-cubic(fcc) structure. From the evolution of RHEED,it can be deduced from the patterns that Volmer-Weber growth mechanism(3-D) dominates at the initial stage. Then,it becomes layerby-layer growth mechanism(2-D) with the increase of the film thickness. Lastly,growth mechanism converts back to 3-D when the film is thick enough. Both electrical resistance and magnetoresistance(MR) were measured at various temperatures using Physical Property Measurement System(PPMS). The electrical resistance measurement indicates that the film sample does not have martensitic transformation in the measurement temperature range. However,with the temperature increasing,the film sample exhibits a transition from metallic to semiconductorlike properties. Moreover,a small negative magnetoresistance was observed at different temperature,which can be explained by the spindependent scattering of the conduction electrons.     

Preparation, microstructure and degradation performance of biomedical magnesium alloy fine wires

With the development of new biodegradable Mg alloy implant devices, the potential applications of biomedical Mg alloy fine wires are realized and explored gradually. In this study, we prepared three kinds of Mg alloy fine wires containing 4 wt% RE(Gd/Y/Nd) and 0.4 wt% Zn with the diameter less than 0.4 μm through casting, hot extruding and multi-pass cold drawing combined with intermediated annealing process. Their microstructures, mechanical and degradation properties were investigated. In comparison with the corresponding as-extruded alloy, the final fine wire has significantly refined grain with an average size of 3–4 μm, and meanwhile shows higher yield strength but lower ductility at room temperature. The degradation tests results and surface morphologies observations indicate that Mg–4Gd–0.4Zn and Mg–4Nd–0.4Zn fine wires have similar good corrosion resistance and the uniform corrosion behavior in SBF solution. By contrast, Mg–4Y–0.4Zn fine wire shows a poor corrosion resistance and the pitting corrosion behavior.     

Impact behaviors of poly-lactic acid based biocomposite reinforced with unidirectional high-strength magnesium alloy wires

A novel poly-lactic acid(PLA) based biocomposite reinforced with unidirectional high-strength magnesium alloy(Mg-alloy) wires for bone fracture fixation was fabricated by hot-compressing process. The macroscopical and microscopical impact behaviors of the biocomposite were investigated using impact experiments and finite element method(FEM), respectively. The results indicated that the biocomposite had favorable impact properties due to the plastic deformation behavior of Mg-alloy wires during impact process. While the content of Mg-alloy wires reached20 vol%, the impact strength of the composite could achieve 93.4 k J/m2, which is approximate 16 times larger than that of pure PLA fabricated by the same process. According to FEM simulation results, the complete destruction life of the composites during impact process increased with increasing volume fraction of Mg-alloy wires, indicating a high impact-bearing ability of the composite for bone fracture fixation.Simultaneously, the energy absorbed by Mg-alloy wires in the composites had a corresponding increase. In addition, it denoted that the impact properties of the composites are sensitive to the initial properties of the matrix material.     

Graphical-based data placement algorithm for cloud workflow

When workflow task needs several datasets from different locations m cloud, data transfer becomes a challenge. To avoid the unnecessary data transfer, a graphical-based data placement algo- rithm for cloud workflow is proposed. The algorithm uses affinity graph to group datasets while keeping a polynomial time complexity. By integrating the algorithm, the workflow engine can intelligently select locations in which the data will reside to avoid the unnecessary data transfer during the initial stage and runtime stage. Simulations show that the proposed algorithm can effectively reduce data transfer during the workflow＇ s execution.     

花椒挥发油作为天然经皮促透剂的细胞毒性及促透活性

研究目的：创新要点：研究方法：重要结论：研究花椒挥发油作为天然经皮促透剂的促透活性及其促透机制,同时评价其皮肤细胞毒性。首次评价了花椒挥发油的皮肤细胞毒性、经皮促透活性及其作用机制。利用表皮角质形成细胞（HaCaT）和真皮成纤维细胞（CCC-ESF-1）评价花椒挥发油的细胞毒性;采用亲水性及亲脂性模型药测定挥发油促透活性的基础上研宄其促透作用机制。花椒挥发油具有良好促透活性并具有较低皮肤细胞毒性。     

茶果皮多糖理化性质、体外抗氧化活性及对α-葡萄糖苷酶的抑制作用

研究目的：利用响应面优化茶果皮多糖（TFPP）提取条件,用乙醇分级分段得到4个多糖组分（TFPP-0、创新要点：研究方法：重要结论：TFPP-20、TFPP-40和TFPP-60）,并研究其理化性质、抗氧化活性和对α-葡萄糖苷酶抑制作用,为综合高效利用茶果皮多糖资源提供理论基础。1．首次将茶果皮作为一种潜在生物资源研究;2．首次研究茶果皮多糖这一功能成分：3．将工艺优化、理化性质和生物活性结合研究。三因素三水平响应面设计（见表1）,傅里叶转换红外光谱法分析茶果皮粗多糖的功能团结构（见图3）,高效液相色谱法检测单糖组分（见表2）,2,2＇-氨基．二（3．乙基．苯并噻唑啉-6-磺酸）二铵盐（ABTS）自由基清除法（见图4a）和铁离子还原能力法（FRAP）（见图4b）分析茶果皮多糖抗氧化活性。1．茶果皮多糖是一种水溶性的酸性杂多糖蛋白复合物;2．乙醇分级是一种有效多糖分离手段;3．茶果皮多糖具有出色的生物活性;4．茶果皮资源可以作为一种可再生生物资源进行深度的开发。     

钝性胸部损伤后内乳动脉损伤的评价

研究目的：评价钝性胸部损伤后内乳动脉损伤的发病率,出血情况和治疗效果。创新要点：通过分析患者由于钝性胸部损伤导致内乳动脉破裂的病情发展,为快速诊断和治疗提供理论指导,并首次探讨了内乳动脉损伤后出血部位的形成机制。研究方法：通过MEDLINE文献数据库共检索出49例由于钝性胸部损伤引起内乳动脉破裂的患者（1977年7月至2014年2月）,进行了系统性分析。重要结论：在分析的49例患者中,男性和左内乳动脉有更高的发病率。内乳动脉破裂出血能引起纵隔血肿﹑血胸﹑假性动脉瘤﹑动静脉瘘和胸膜外血肿。其中20例患者给予栓塞治疗,22例选择外科手术,4例进行临床观察,3例未描述治疗情况。内乳动脉损伤的不同程度和范围、临近的静脉损伤以及胸膜的完整性决定了患者的出血类型。在患者的治疗中,推荐快速诊断、彻底止血、加强复苏和团队合作。     

Derivation of P–T paths for Middle–Late Triassic very low-grade metapelite from Hongcan Well 1 in the Zoigê Depression and their tectonic implications

Using XRD measurements of illite crystallinity,b0values of K-rich white micas and chemical compositions of chlorites combined with homogenization temperatures of fluid inclusions in calcite,the metamorphic P–T conditions of very low-grade metapelites from different depths in the 7 km Hongcan Well 1 in the Zoige?Depression,Sichuan,China,have been obtained in this paper.Knowledge of the tectonic evolution of the studied basin allows us to derive geothermal curves for Middle and Late Triassic time(the geothermal peak)and the present day(from thermal logging of the borehole).The retrograde P–T tracks from clockwise P–T–t loops have been revealed by the plotting of individual samples on each geotherm,which can be interpreted by the lithospheric thickening due to sedimentation and folding followed by continuous uplift and erosion.A stratigraphic log indicates that the Well penetrates the steep limb of a fold which perturbed the peak geotherm and caused some P–T paths to cross.     

Investigation of the kinetic mechanism of the demanganization reaction between carbon-saturated liquid iron and CaF2-CaO-SiO2-based slags

The demanganization reaction kinetics of carbon-saturated liquid iron with an eight-component slag consisting of CaO-SiO₂-MgO-FeO-MnO-Al₂O₃-TiO₂-CaF₂ was investigated at 1553, 1623, and 1673 K in this study. The rate-controlling step (RCS) for the demanganization reaction with regard to the hot metal pretreatment conditions was studied via kinetics analysis based on the fundamental equation of heterogeneous reaction kinetics. From the temperature dependence of the mass transfer coefficient of a transition-metal oxide (MnO), the apparent activation energy of the demanganization reaction was estimated to be 189.46 kJ·mol-1 in the current study, which indicated that the mass transfer of MnO in the molten slag controlled the overall rate of the demanganization reaction. The calculated apparent activation energy was slightly lower than the values reported in the literature for mass transfer in a slag phase. This difference was attributed to an increase in the "specific reaction interface" (SRI) value, either as a result of turbulence at the reaction interface or a decrease of the absolute amount of slag phase during sampling, and to the addition of calcium fluoride to the slag.