摘要：分段线性表示(PLR)技术目前已在多个领域被广泛用于重新表征高维的时间序列数据,以实现数据维度降低、波动过滤和整体趋势提取的目的。然而,该技术目前尚未在高速列车的隧道压力波数据的相关分析处理中得到应用。因此,本研究首次引入PLR技术对典型的高维列车压力波数据序列进行重新表征,并针对高速列车的压力波数据专门设计了一种基于感知重要点(PIP)且性能表现较好的PLR算法。研究结果表明,数据点重要性的度量方法和分段误差评估方法,特别是前者,对压力波序列的PIP的识别优先级甚至最终结果都会产生影响。与欧氏距离(ED)和正交距离(OD)相比,当将垂直距离(VD)作为数据点重要性的度量方法时,PLR_PIP算法(PLR_PIP_VD)获得了更合理的高速列车压力波的PLR结果。通过累积误差、平均误差和最大误差三种分段误差评估方法之间的对比,当将累积误差作为分段误差评估方法时,PLR_PIP_VD算法得到了相对较好的高速列车压力波的PLR结果。提出的适用于高速列车压力波PLR分析的PLR_PIP算法,为高速列车的压力波数据序列的分析处理提供了一种新的方法。

摘要：Heterostructured photocatalysts provide an effective way to achieve enhanced photocatalytic performances through efficient charge *** both wide-and narrow-band-gap photocatalysts have been widely investigated,the charge separation and transfer mechanism at the contacting interface of the two has not been fully ***,a novel SrTiO3/BiOI(STB)heterostructured photocatalyst was successfully fabricated by using a facile *** heterostructure in the photocatalyst extends the photoabsorption to the visible light range,and thus,high photocatalytic NO removal performance can be achieved under visible light irradiation.A combination of experimental and theoretical evidences indicated that the photogenerated electrons from the BiOI semiconductor can directly transfer to the SrTiO3 surface through a preformed electron delivery *** electron transfer was expected between the SrTiO3 and BiOI surfaces under light irradiation,and leads to efficient ROS generation and thus a high NO conversion ***,in situ diffused reflectance infrared Fourier transform spectroscopy revealed that STB can better inhibit the accumulation of the toxic intermediate NO2 and catalyze the NO oxidation more *** work presents a new insight into the mechanism of the interfacial charge separation in heterostructures and provides a simple strategy to promote the photocatalytic technology for efficient and safe air purification.

摘要：An optimal design of wastewater reuse for a University is concerned in this paper. The raw water and the capacity of wastewater reuse were determined according to the wastewater characteristic of a university; the treatment process was chosen by building a cost-benefit model; and the modeling test was performed about the operation effect of the proposed project and the recommended water quality of reclaimed water. It is estimated that 3.4×10^5 m^3/a tap water and 6.1×10^5 Yuan/a will be saved if the project was put into operation and the proposed project will reduce the total quantity of pollutant efficiently and bring lots of social and economic benefits.

摘要：为研究Q420高强度等边角钢轴压构件的整体稳定受力性能与设计方法,该文采用有限元软件ANSYS建立数值模型,并经与试验结果对比验证后进行了大量参数分析,研究了构件几何初始缺陷、残余应力和钢材屈强比对该类轴压构件整体稳定性能的影响,分析了已有设计方法的适用性。结果表明,构件初始缺陷对其稳定性能的影响与构件长细比及失稳模态有关,残余应力的影响与构件长细比有关,钢材屈强比的影响较小。基于数值计算结果建议了Q420高强度等边角钢轴压构件考虑板件局部屈曲相关作用的整体稳定设计方法,为补充和完善我国钢结构设计规范提供了参考,同时也有利于促进高强度钢材在我国钢结构工程中的应用。

摘要：Abstract： An optimization study on electrodeposition of copper film from sulfuric acid bath in presence of supercritical carbon dioxide fluid was explored for electronic application. Factors that influence roughness of copper deposit were also discussed. A material property of copper deposition has been considered as a response variable and statistical experimental methods have been used to optimize the process parameters and the response. Effects of various current density, pressure and temperature were investigated to select the optimal operation factors. Scanning electron microscopy and atomic force microscopy were applied to determine average particle sizes and to confirm the characteristic of the metallic film obtained. Box-Behnken design and RSM （response surface methodology） were applied to find the optimal conditions of supercritical electroplating process. Regression model was built by fitting the experimental results with a second-order polynomial and was proved to be statistically significant since the coefficient of determination coefficient （R^2） was 0.9844. The optimal film of deposited can be obtained at current density 0.17 A/dm^2, pressure 186 bar and temperature 31.5 ℃.

摘要：The vicious cycle between tumor cell proliferation and bone resorption remarkably elevates the progression and metastasis of bone ***,we fabricated polyethylene glycol-conjugated alendronate-functionalized and chloroquine(CQ)-loaded polydopamine nanoparticles(PPA/CQ)for efficient treatment of bone tumors via breaking the vicious *** nanoparticles were efficiently accumulated to the bone tissues,especially the osteolytic lesions around *** released from PPA/CQ inhibited osteoclastogenesis via preventing the degradation of tumor necrosis factor(TNF)receptor-associated receptor 3 to attenuate the osteolysis in bone *** the other hand,CQ blocked the autophagy in cancer cells,resulting in improved photothermal killing of cancer ***,the in vivo experiment revealed that PPA/CQ-associated treatment efficiently inhibited both tumor growth and *** work suggests that autophagy inhibition-associated photothermal therapy could be a promising strategy for treating malignant bone tumors.

摘要：In this study, two full-size concrete wails were tested and analyzed to demonstrate the effectiveness of a chemically reactive enamel （CRE） coating in improving their mechanical behavior under blast loading： one with CRE-coated rebar and the other with uncoated rebar. Each wall was subjected in sequence to four explosive loads with equivalent 2, 4, 6-trinitrotoluene （TNT） charge weights of 1.82, 4.54, 13.6, and 20.4 kg. A finite element model of each wall under a close-in blast load was developed and validated with pressure and strain measurements, and used to predict rebar stresses and concrete surface sWain distributions of the wall. The test results and visual inspections consistently indicated that, compared with the barrier wall with uncoated reinforcement, the wall with CRE-coated rebar has fewer concrete cracks on the front and back faces, more effective stress transfers from concrete to steel rebar, and stronger connections with its concrete base. The concrete surface strain distributions predicted by the model under various loading conditions are in good agreement with the crack patterns observed during the tests.

摘要：Random dynamic responses caused by the uncertainty of structural parameters of the coupled train-ballasted track-subgrade system under train loading can pose safety concerns to the train *** paper introduced a computational model for analyzing probabilistic dynamic responses of three-dimensional(3D)coupled train-ballasted track-subgrade system(TBTSS),where the coupling effects of uncertain rail irregularities,stiffness and damping properties of ballast and subgrade layers were simultaneously *** number theoretical method(NTM)was employed to design discrete points for the multi-dimensional stochastic *** time-histories of stochastic dynamic vibrations of the TBSS with systematically uncertain structural parameters were calculated accurately and efficiently by employing the probability density evolution method(PDEM).The model-predicted results were consistent with those by the Monte Carlo simulation method.A sensitivity study was performed to assess the relative importance of those uncertain structural parameters,based on which a case study was presented to explore the stochastic probability evolution mechanism of such train-ballasted track-subgrade system.

摘要：With the expansion of a city,the urban green space is occupied and the urban heat island effect is *** the roof surfaces of urban buildings is an effective way to increase the area of urban green space and improve the urban ecological *** provide effective data support for urban green space planning,this paper used high-resolution images to(1)obtain accurate building spots on the map of the study area through deep learning assisted manual correction;and(2)establish an evaluation index system of roof greening including the characteristics of the roof itself,the natural environment and the human society *** weight values of attributes not related to the roof itself were calculated by Analytic Hierarchy Process(AHP).The suitable green roof locations were evaluated by spatial join,weighted superposition and other spatial analysis *** the areas within the Chengdu city’s third ring road as the study area,the results show that an accurate building pattern obtained by deep learning greatly improves the efficiency of the *** roof surfaces unsuitable for greening can be effectively classified by the method of feature extraction,with an accuracy of 86.58%.The roofs suitable for greening account for 48.08%,among which,the high-suitability roofs,medium-suitability roofs and low-suitability roofs represent 45.32%,38.95%and 15.73%.The high-suitability green buildings are mainly distributed in the first ring district and the western area outside the first ring district in *** paper is useful for solving the current problem of the more saturated high-density urban area and allowing the expansion of the urban ecological environment.

摘要：The purpose of this research is to present design strategies to enable coastal areas to adapt to climate change and maintain the coastlines by addressing the environmental and urban issues. Gangneung is a tourist attraction situated on South Korea’s east coast, and there is an urgent need for integrated research on strategies to prevent the loss of sandy beaches and the damage caused by storm surges and high swell. This research has two objectives: The first is to offer an overview and describe the characteristics of exemplary projects carried out to manage the storm damage while maintaining the coastlines. The second is to propose a design model that can be applied to coastal areas susceptible to climate change by analyzing the design strategies and the current conditions of the Gangneung coastal area. In the case of Gangneung, the damage caused by the storm surges and high swells are more severe compared to inundation caused by sea level rise because of the steep slope and deep water. Therefore, adaptive design strategies are mainly focused on accommodation and retreat strategies that consider these characteristics by moving the coastal roads behind the pine forest and raising the coastal buildings to connect the coast to the forest and to prevent coastal erosion. This research has the potential to be used as an exemplary design adaptation for coastal erosion as well as a basis for regulating the land use policy in areas susceptible to flood by establishing guidelines for publicly funded developments, and preparing long-term relocation plans for the existing coastal developments to create a sustainable and resilient future for the coastal areas.