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| 1 | Reversal of B-cell hyperactivation and functional impairment is associated with HBsAg seroconversion in chronic hepatitis B patients显示文摘B 房间对再感染在肝炎 B 病毒(HBV ) 和保护的清理起一个重要作用。然而,与长期的 HBV 感染的结果被联系的这些房间的功能的特征仍然保持未知。我们包括地在不同阶段从 CHB 病人调查了外部 B 房间子集的频率,显型,和功能:有免疫力的忍耐(信息技术) ,有免疫力的激活(IA ) ,有免疫力的清理(IC ) ,有 HBsAg seroconversion 的应答者(解决的病人, RP ) ,并且健康控制(HC ) 。IA 病人与另外的组相比显示了外部血记忆 B 房间的更低的百分比。B 房间的全面 polyclonal 激活,由激活标记和 IgG 和 IgM 的分泌物的高水平显示了,在 IA 病人被观察。这 B 房间 hyperactivation 能被增加的 IFN-α 导致;并且在 IA 病人的可溶的 CD40 ligands。尤其是,合作激发器分子 CD80 和浆液 HBsAb 的表示和 HBsAg 特定的 B 房间的频率显著地与 HC 题目相比在信息技术, IA,和 IC 病人被减少。更重要地, B 房间 hyperactivation, co-stimulatory 分子 downregulation 和 HBsAg 特定的 B 房间缺陷在 RP 病人被颠倒。B 房间 hyperactivation 和功能的缺陷的颠倒在长期的肝炎 B 病人与 HBsAg seroconversion 被联系。 | Xiangsheng Xu Qinghua Shang Xinyue Chen Weimin Nie Zhengsheng Zou Ang Huang Ming Meng Lei Jin Ruonan Xu Ji-Yuan Zhang Junliang Fu Lifeng Wang Zirong Tang Yunbo Xie Xiaoming Yang Zheng Zhang Fu-Sheng Wang | 2015 | Cellular & Molecular Immunology2015，12，3： | 15 |
| 2 | Digital virtual flight testing and evaluation method for flight characteristics airworthiness compliance of civil aircraft based on HQRM显示文摘In order to incorporate airworthiness requirements for flight characteristics into the entire development cycle of electronic flight control system(EFCS) equipped civil aircraft, digital virtual flight testing and evaluation method based on handling qualities rating method(HQRM)is proposed. First, according to HQRM, flight characteristics airworthiness requirements of civil aircraft in EFCS failure states are determined. On this basis, digital virtual flight testing model,comprising flight task digitized model, pilot controlling model, aircraft motion and atmospheric turbulence model, is used to simulate the realistic process of a pilot controlling an airplane to perform assigned flight tasks. According to the simulation results, flight characteristics airworthiness compliance of the airplane can be evaluated relying on the relevant regulations for handling qualities(HQ) rating. Finally, this method is applied to a type of passenger airplane in a typical EFCS failure state, and preliminary conclusions concerning airworthiness compliance are derived quickly. The research results of this manuscript can provide important theoretical reference for EFCS design and actual airworthiness compliance verification of civil aircraft. | Liu Fan Wang Lixin Tan Xiangsheng | 2015 | Chinese Journal of Aeronautics2015，28，1： | 13 |
| 3 | Effects of Machine Tool Configuration on Its Dynamics Based on Orthogonal Experiment Method显示文摘In order to analyze the influence of configuration parameters on dynamic characteristics of machine tools in the working space, the configuration parameters have been suggested based on the orthogonal experiment method. Dynamic analysis of a milling machine, which is newly designed for producing turbine blades, has been conducted by utilizing the modal synthesis method. The finite element model is verified and updated by experimental modal analysis (EMA) of the machine tool. The result gained by modal synthesis method is compared with whole-model finite element method (FEM) result as well. According to the orthogonal experiment method, four configuration parameters of machine tool are considered as four factors for dynamic characteristics. The influence of configuration parameters on the first three natural frequencies is obtained by range analysis. It is pointed out that configuration parameter is the most important factor affecting the fundamental frequency of machine tools, and configuration parameter has less effect on lower-order modes of the system than others. The combination of configuration parameters which makes the fundamental frequency reach the maximum value is provided. Through demonstration, the conclusion can be drawn that the influence of configuration parameters on the natural frequencies of machine tools can be analyzed explicitly by the orthogonal experiment method, which offers a new method for estimating the dynamic characteristics of machine tools. | GAO Xiangsheng ZHANG Yidu ZHANG Hongwei WU Qiong | 2012 | Chinese Journal of Aeronautics2012，25，2： | 11 |
| 4 | Temperature variation and abrupt change analysis in the Three-River Headwaters Region during 1961-2010显示文摘In this study, a monthly dataset of temperature time series (1961-2010) from 12 meteorological stations across the Three-River Headwater Region of Qinghai Province (THRHR) was used to analyze the climate change. The temperature variation and abrupt change analysis were examined by using moving average, linear regression, Spline interpo-lation, Mann-Kendall test and so on. Some important conclusions were obtained from this research, which mainly contained four aspects as follows. (1) There were several cold and warm fluctuations for the annual and seasonal average temperature in the THRHR and its three sub-headwater regions, but the temperature in these regions all had an obviously rising trend at the statistical significance level, especially after 2001. The spring, summer, autumn and annual average temperature increased evidently after the 1990s, and the winter average temperature exhibited an obvious upward trend after entering the 21st century. Except the standard value of spring temperature, the annual and seasonal temperature standard value in the THRHR and its three sub-headwater regions increased gradually, and the upward trend for the standard value of winter average temperature indicated significantly. (2) The tendency rate of annual average temperature in the THRHR was 0.36℃10a?1, while the tendency rates in the Yellow River Headwater Region (YERHR), Lancangjiang River Headwater Region (LARHR) and Yangtze River Headwater Region (YARHR) were 0.37℃10a?1, 0.37℃10a?1 and 0.34℃10a?1 respectively. The temperature increased significantly in the south of Yushu County and the north of Nangqian County. The rising trends of temperature in winter and autumn were higher than the upward trends in spring and summer. (3) The abrupt changes of annual, summer, autumn and winter average temperature were found in the THRHR, LARHR and YARHR, and were detected for the summer and autumn average temperature in the YERHR. The abrupt changes of annual and summer average temperatures were mainly in the late 1990s, while the abrupt changes of autumn and winter average temperatures ap-peared primarily in the early 1990s and the early 21st century respectively. (4) With the global warming, the diversities of altitude and underlying surface in different parts of the Tibetan Plateau were possibly the main reasons for the high increasing rate of temperature in the THRHR. | Yi Xiangsheng Li Guosheng Yin Yanyu | 2012 | Journal of Geographical Sciences2012，22，3： | 9 |
| 5 | Constitutive modeling of flow behavior and processing maps of Mg-8.1 Gd-4.5Y-0.3Zr alloy显示文摘High temperature deformation behavior and workability of Mg-8.1 Gd-4.5Y-0.3Zr alloy were studied by compression tests.Arrhenius equation with strain compensation and processing maps were established.The results show that the activation energy Q,structure factor a,n and In A varies with the strain,its relationship fit well by fifth order polynomial.The flow stresses predicted by the extracted model are in good agreement with the experimental results.There are five typical domains in the processing map,and the deformation mechanisms in different domains were determined by microstructure analysis.The feasible processing window of the alloy is in the areas of 400-500℃/0.001-0.1 s^(-1). | Xiangsheng Xia Kui Zhang Minglong Ma Ting Li | 2020 | Journal of Magnesium and Alloys2020，8，3： | 9 |
| 6 | Quick Synthesis of Titanium Silicalite-1显示文摘 | WANG Liqin WANG Xiangsheng GUO Xinwen LI Gang XIU Jinghai | 2001 | 催化学报2001，22，6： | 8 |
| 7 | Correlation of the quantifiable parameters of blood flow pattern derived with dynamic CT in solitary bronchogenic adenocarcinoma显示文摘Objective:To evaluate the correlation of the quantifiable parameters of blood flow pattern derived with dynamic CT in solitary bronchogenic adenocarcinoma(SBA).Methods:46 patients with solitary bronchogenic adenocarcinomas (SBA)(diameter≤4 cm)underwent multi-location dynamic contrast material-enhanced(nonionic contrast material was administrated via the antecubital vein at a rate of 4 mL/s by using an autoinjector 90 mL,4×5 mm or 4×2.5 mm scanning mode with stable table were performed)serial CT.Precontrast and postcontrast attenuation on every scan was recorded.Perfusion (PBA),peak height(PHBA),ratio of peak height of the SPN to that of the aorta(BA-to-A ratio)and mean transit time(MTT)were calculated.The correlation between peak height of the aorta(PHA)and parameters of the SBA(PHBA,BA-to-A ratio,PBA,and MTT)and those among parameters of the SBA were assessed by means of linear regression analysis.Regression equation among parameters of the SBA were obtain by means of stepwise regression.Results:The correlation between the SBA peak height(PHBA,36.78 HU±12.02)and the aortic peak height(PHA)was significant(r=0.506,P<0.0001).No significant cor- relation was found between the BA-to-Apeak height ratio(15.33%±4.55)and the aortic peak height(r=0.130,P=0.388> 0.05)as it was between the SBA perfusion(PBA,31.86 mL/min/100 g±9.74)and the aortic peak height(r=0.049,P=0.749 >0.05).The SBA perfusion correlated with the PHBA and the BA-to-A peak height ratio(r=0.394,P=0.007<0.05;r=0.407, P=0.005<0.05).The PHBA correlated positively with the BA-to-A peak height ratio(r=0.781,P<0.0001).Mean transit time was 14.84 s±5.52.PBA=18.500+0.872×BA-to-A ratio.BA-to-A ratio=4.467+0.295×PHBA.Conclusion:The linear correlation between the SBA perfusion and BA-to-Aratio and that between BA-to-Aratio and PHBA can be expressed by equation. It is possible to design a simpler scanning procedure of investigation of bronchogenic adenocarcinoma angiogenesis. | Shenjiang Li Xiangsheng Xiao Shiyuan Liu Huimin Li Chengzhou Li Chenshi Zhang | 2007 | The Chinese-German Journal of Clinical Oncology2007，6，4： | 8 |
| 8 | Methane aromatization in the absence of oxygen over extruded and molded MoO_3/ZSM-5 catalysts:Influences of binder and molding method显示文摘The influences of binder and molding method on the catalytic performance of methane aromatization in the absence of O2 over MoO3/ZSM-5 catalysts were investigated.SEM,NH3-TPD,FT-IR of adsorbed pyridine,N2 adsorption-desorption,cyclohexane adsorption and XPS were employed to characterize the physical and chemical properties of the catalysts.It was found that SiO2 was a suitable binder for the catalyst due to its appropriate weak acidity.The laminar catalyst comprising of an inert spherical core and a MoO3/ZSM-5 laminar shell with 0.1 0.2 mm in thickness showed a better catalytic performance than the extruded catalyst.The improved activity of the laminar catalyst could be attributed to the easy carbonization of Mo species and the quick removal of reaction products from the catalyst surface. | Dongmei Ren Xiangsheng Wang Gang Li Xiaojing Cheng Huayun Long Lidong Chen | 2010 | Journal of Natural Gas Chemistry2010，19，6： | 7 |
| 9 | Convolutional Neural Networks Based Indoor Wi-Fi Localization with a Novel Kind of CSI Images显示文摘Indoor Wi-Fi localization of mobile devices plays a more and more important role along with the rapid growth of location-based services and Wi-Fi mobile devices.In this paper,a new method of constructing the channel state information(CSI)image is proposed to improve the localization accuracy.Compared with previous methods of constructing the CSI image,the new kind of CSI image proposed is able to contain more channel information such as the angle of arrival(AoA),the time of arrival(TOA)and the amplitude.We construct three gray images by using phase differences of different antennas and amplitudes of different subcarriers of one antenna,and then merge them to form one RGB image.The localization method has off-line stage and on-line stage.In the off-line stage,the composed three-channel RGB images at training locations are used to train a convolutional neural network(CNN)which has been proved to be efficient in image recognition.In the on-line stage,images at test locations are fed to the well-trained CNN model and the localization result is the weighted mean value with highest output values.The performance of the proposed method is verified with extensive experiments in the representative indoor environment. | Haihan Li Xiangsheng Zeng Yunzhou Li Shidong Zhou Jing Wang | 2019 | China Communications2019，16，9： | 7 |
| 10 | Pedotransfer Functions for Estimating Soil Bulk Density:A Case Study in the Three-River Headwater Region of Qinghai Province,China显示文摘Bulk density(BD) is an important soil physical property and has significant effect on soil water conservation function. Indirect methods, which are called pedotransfer functions(PTFs), have replaced direct measurement and can acquire the missing data of BD during routine soil surveys. In this study, multiple linear regression(MLR) and artificial neuron network(ANN) methods were used to develop PTFs for predicting BD from soil organic carbon(OC), texture and depth in the Three-River Headwater region of Qinghai Province, China. The performances of the developed PTFs were compared with 14 published PTFs using four indexes, the mean error(ME), standard deviation error(SDE), root mean squared error(RMSE) and coefficient of determination(R^2). Results showed that the performances of published PTFs developed using exponential regression were better than those developed using linear regression from OC. Alexander(1980)-B, Alexander(1980)-A and Manrique and Jones(1991)-B PTFs, which had good predictions, could be applied for the soils in the study area. The PTFs developed using MLR(MLR-PTFs) and ANN(ANN-PTFs) had better soil BD predictions than most of published PTFs. The ANN-PTFs had better performances than the MLR-PTFs and their performances could be improved when soil texture and depth were added as predictor variables. The idea of developing PTFs for predicting soil BD in the study area could provide reference for other areas and the results could lay foundation for the estimation of soil water retention and carbon pool. | YI Xiangsheng LI Guosheng YIN Yanyu | 2016 | Pedosphere2016，26，3： | 7 |
| 11 | Spatio-temporal variation of precipitation in the Three-River Headwater Region from 1961 to 2010显示文摘越过 Qinghai 省,中国,时间空间的变化和突然的变化的三河的 Headwater 区域( THRHR )从 12 个气象学的车站基于 降水时间系列( 19612010 )的每月的数据集 降水的分析被使用动人的平均、线性回归检验,花键插值, Mann-Kendall 测试等等。主要结论如下。(1 ) 在学习区域的长期的年度、季节的降水在 19612010 期间与一些摆动显示了一个增加的趋势;然而,在澜沧江(Lancang ) 河 Headwater 区域(LARHR ) 的夏天降水,和在 THRHR 的长江 Headwater 区域(YERHR ) 的秋天降水在一样的时期减少了。(2 ) 在 THRHR 和它的三个 sub-headwater 区域的年度降水的数量在 1980 年代和 2000 年代是更大的。当夏天在 1960 年代, 1980 年代和 2000 年代是相对湿的时,弹簧在 1970 年代以后是相当湿的。另外,在秋天的降水的数量在 1970 年代和 1980 年代是更大的,但是它是相对为冬季降水的更少,除了在 1990 年代。(3 ) 正常在 THRHR 和它的三 sub-headwater 春天,夏天,冬季和年度降水珍视都增加的区域,而是在 LARHR 的夏天降水的正常价值把一个否定趋势和冬季降水的正常价值一般来说拒绝了。(4 ) 春天和冬季降水在大多数 THRHR 增加了。夏天,秋天和年度降水主要在西方和北方的边缘的区域增加了并且在 Yushu, Zaduo, Jiuzhi 和 Banma 的区域减少了。(5 ) 在 THRHR 和它的三个 sub-headwater 区域的春天和冬季降水显示出一个突然的变化,除了在 YARHR 的春天降水。春天降水的突然的变化主要在 1980 年代末和 1990 年代初,当冬季降水的突然的变化在中间 1970 年代末是主要的时。这研究将对进一步在 THRHR 理解降水并且为基于分水岭的水资源管理的趋势和频率有用。 | YI Xiangsheng LI Guosheng YIN Yanyu | 2013 | Journal of Geographical Sciences2013，23，3： | 7 |
| 12 | Genotypic variation in phosphorus acquisition from sparingly soluble P sources is related to root morphology and root exudates in Brassica napus显示文摘Genotypic variations in the adaptive response to low-phosphorus(P) stress and P-uptake efficiency have been widely reported in many crops.We conducted a pot experiment to evaluate the P-acquisition ability of two rapeseed(Brassica napus) genotypes supplied with two sparingly soluble sources of P,Al-P and Fe-P.Then,the root morphology,proton concentrations,and carboxylate content were investigated in a solution experiment to examine the genotypic difference in P-acquisition efficiency.Both genotypes produced greater biomass and accumulated more P when supplied with Al-P than when supplied with Fe-P.The P-efficient genotype 102 showed a significantly greater ability to deplete sparingly soluble P from the rhizosphere soil because of its greater biomass and higher P uptake compared with those of the P-inefficient genotype 105.In the solution experiment,the P-efficient genotype under low-P conditions developed dominant root morphological traits,and it showed more intensive rhizosphere acidification because of greater H+ efflux,higher H+-ATPase activity,and greater exudation of carboxylates than the P-inefficient genotype.Thus,a combination of morphological and physiological mechanisms contributed to the genotypic variation in the utilization of different sparingly soluble P sources in B.napus. | ZHANG HaiWei HUANG Yu YE XiangSheng XU FangSen | 2011 | Science China(Life Sciences)2011，54，12： | 6 |
| 13 | Microstructures and strengthening mechanisms of Mg-8.2Gd-4.6Y-1.5Zn-0.4Zr alloy containing LPSO,β’ and γ type phases显示文摘The microstructures and strengthening mechanisms of the Mg-8.2 Gd-4.6 Y-1.5 Zn-0.4 Zr(wt%) alloy with long-period stacking ordered(LPSO),β’ and γ type phases were systematically studied.The results show that the LPSO with lamellar and block structures forms near the grain boundaries.The grains are clearly refined,and the 18 R LPSO phase is oriented along the extrusion direction after extrusion.Some particles also precipitate from the Mg matrix dynamically.The extruded alloy exhibits a remarkable agehardening response,and mechanical properties,with a tensile strength(TS) of 449 MPa,yield strength(YS) of 362 MPa,and elongation of 7.9% obtained in the peak-aged alloy.The strengthening mechanisms of the alloy in different states are discussed.Grain boundary and precipitation strengthening are the main strengthening mechanisms for the peak-aged alloy. | Xiangsheng Xia Kui Zhang Minglong Ma Ting Lie | 2020 | Journal of Rare Earths2020，38，10： | 5 |
| 14 | CsbZIP1-CsMYB12 mediates the production of bitter-tasting flavonols in tea plants (Camellia sinensis) through a coordinated activator–repressor network显示文摘Under high light conditions or UV radiation,tea plant leaves produce more flavonols,which contribute to the bitter taste of tea;however,neither the flavonol biosynthesis pathways nor the regulation of their production are well understood.Intriguingly,tea leaf flavonols are enhanced by UV-B but reduced by shading treatment.CsFLS,CsUGT78A14,CsMYB12,and CsbZIP1 were upregulated by UV-B radiation and downregulated by shading.CsMYB12 and CsbZIP1 bound to the promoters of CsFLS and CsUGT78A14,respectively,and activated their expression individually.CsbZIP1 positively regulated CsMYB12 and interacted with CsMYB12,which specifically activated flavonol biosynthesis.Meanwhile,CsPIF3 and two MYB repressor genes,CsMYB4 and CsMYB7,displayed expression patterns opposite to that of CsMYB12.CsMYB4 and CsMYB7 bound to CsFLS and CsUGT78A14 and repressed their CsMYB12-activated expression.While CsbZIP1 and CsMYB12 regulated neither CsMYB4 nor CsMYB7,CsMYB12 interacted with CsbZIP1,CsMYB4,and CsMYB7,but CsbZIP1 did not physically interact with CsMYB4 or CsMYB7.Finally,CsPIF3 bound to and activated CsMYB7 under shading to repress flavonol biosynthesis.These combined results suggest that UV activation and shading repression of flavonol biosynthesis in tea leaves are coordinated through a complex network involving CsbZIP1 and CsPIF3 as positive MYB activators and negative MYB repressors,respectively.The study thus provides insight into the regulatory mechanism underlying the production of bitter-tasting flavonols in tea plants. | Xuecheng Zhao Xiangsheng Zeng Ning Lin Shuwei Yu Alisdair RFernie Jian Zhao | 2021 | Horticulture Research2021，8，1： | 4 |
| 15 | Highly Effective Propylene Epoxidation with Hydrogen-Oxygen Mixture over Ag/TS-1 Catalysts显示文摘 | WANG Ruipu, HAO Jingquan, GUO Xinwen, WANG Xiangsheng (State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116012, Liaoning, China) | 2003 | 催化学报2003，24，5： | 4 |
| 16 | Correlation between the quantifiable parameters of blood flow pattern derived with dynamic CT in malignant solitary pulmonary nodules and tumor size显示文摘Objective: To evaluate the correlation between the quantifiable parameters of blood flow pattern derived with dy- namic CT in malignant solitary pulmonary nodules and tumor size. Methods: Sixty-eight patients with malignant solitary pulmo- nary nodules (SPNs) (diameter ≤4 cm) underwent multi-location dynamic contrast material-enhanced (nonionic contrast material was administrated via the antecubital vein at a rate of 4mL/s by using an autoinjector, 4×5 mm or 4×2.5 mm scanning mode with stable table were performed). Precontrast and postcontrast attenuation on every scan was recorded. Blood flow (BF), peak, height (PHSPN), ratio of peak height of the SPN to that of the aorta (SPN-to-A ratio) and mean transit time (MTT) were calculat- ed. The correlation between the quantifiable parameters of blood flow pattern derived with dynamic CT in malignant solitary pul- monary nodules and tumor size were assessed by means of linear regression analysis. Results: No significant correlations were found between the tumor size and each of the peak height (PHSPN) (35.79±10.76 Hu), ratio of peak height of the SPN to that of the aorta (SPN-to-A ratio), (14.27%±4.37) and blood flow (BF) (30.18 mL/min/100 g±9.58) (r=0.180, P=0.142>0.05; r=0.205, P=0.093>0.05; r=0.008, P=0.947>0.05). Conclusion: No significant correlations were found between the tumor size and each of the quantifiable parameters of blood flow pattern derived with dynamic CT in malignant solitary pulmonary nodules. | Shenjiang Li Xiangsheng Xiao Shiyuan Liu Huimin Li Chengzhou Li Chenshi Zhang | 2006 | The Chinese-German Journal of Clinical Oncology2006，5，5： | 3 |
| 17 | Status of Rare Earths for Agriculture in China显示文摘Rare Earths (RE) for agriculture is a very typical application and has already brought good economic benefit to Chinese agriculture and farmers.In this paper, the origin, development, status and the future of RE for agriculture in China were discussed.Firstly, through the researches of RE in the fields of physiological activity, physiological and biochemical mechanism, sanitation toxicology and environment security in 1980's, RE has been extended more widely in agriculture, such as crops, vegetables, forest, wood grass and stock breeding, such as cattle, fish and chicken.Secondly, with using of new techniques that were developed in the 'State Ninth Five-Year Plan', the utilization area of RE was expanded to broad agricultural space, such as sunlight converting plastic film, RE fertilizer, RE drought resistant and RE water saving materials and new RE top dressing fertilizer.Thirdly, with the development of the nanometer materials, the techniques and process of nanometer RE materials were focused.Around these kinds of materials, the new seed cover matters, new seed mixed matter and new nanometer fertilizer will appear in the near future, and will produce many updated techniques and improve a new round RE application in agriculture. | Wang Jiachen Yang Jun Liu Xiangsheng | 2004 | Journal of Rare Earths2004，22，z1： | 3 |
| 18 | A novel BIST scheme for circuit aging measurement of aerospace chips显示文摘The avionics working environment is bad, easy to accelerate aging of circuits. Circuit aging is one of the important factors that influence the reliability of avionics, so circuit aging testing is of great significance to improve the reliability of avionics. As continuing aging would degrade circuit performance, aging can be monitored through precise measurement of performance degradation. However, previous methods for predicting circuit performance have limited prediction accuracy. In this paper, we propose a novel Built-In Self-Test(BIST) scheme for circuit aging measurement, which constructs self-oscillation loops employing parts of critical paths and activates oscillations by specific test patterns. An aging signature counter is then used to capture the oscillation frequency and in turn measure the aging state of the circuit. We propose to implement this measurement process by BIST. Experimental results show that the proposed in-field aging measurement is robust with respect to process variations and can achieve a precision of about 90%. The application of this scheme has a certain value to improve the reliability of avionics systems. | Huaguo LIANG Xiangsheng FANG Maoxiang YI Zhengfeng HUANG Yingchun LU | 2018 | Chinese Journal of Aeronautics2018，31，7： | 3 |
| 19 | Research on Combined Construction Technology for Cross-Subway Tunnels in Underground Spaces显示文摘 | Xiangsheng Chen | 2018 | Engineering2018，4，1： | 3 |
| 20 | Prediction of geological characteristics from shield operational parameters by integrating grid search and K-fold cross validation into stacking classification algorithm显示文摘This study presents a framework for predicting geological characteristics based on integrating a stacking classification algorithm(SCA) with a grid search(GS) and K-fold cross validation(K-CV). The SCA includes two learner layers: a primary learner’s layer and meta-classifier layer. The accuracy of the SCA can be improved by using the GS and K-CV. The GS was developed to match the hyper-parameters and optimise complicated problems. The K-CV is commonly applied to changing the validation set in a training set. In general, a GS is usually combined with K-CV to produce a corresponding evaluation index and select the best hyper-parameters. The torque penetration index(TPI) and field penetration index(FPI) are proposed based on shield parameters to express the geological characteristics. The elbow method(EM) and silhouette coefficient(Si) are employed to determine the types of geological characteristics(K) in a Kmeans++ algorithm. A case study on mixed ground in Guangzhou is adopted to validate the applicability of the developed model. The results show that with the developed framework, the four selected parameters, i.e. thrust, advance rate, cutterhead rotation speed and cutterhead torque, can be used to effectively predict the corresponding geological characteristics. | Tao Yan Shui-Long Shen Annan Zhou Xiangsheng Chen | 2022 | Journal of Rock Mechanics and Geotechnical Engineering2022，14，4： | 3 |
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