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期刊论文 18

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2023 1

2022 1

2021 1

2020 1

2019 1

2018 2

2017 1

2016 2

2013 1

2012 3

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2008 1

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关键词

HMAC-SM3；侧信道分析；相关能量攻击；基于比特值的选择明文 1

三维k－ε紊流数学模型 1

准噶尔盆地西缘 1

判别学习；统计建模；贝叶斯分类器；高斯混合模型；UCI数据集 1

协议独立的组播路由一稀疏模式（PIM-SM) 1

多会聚点（RPs) 1

多类学习；最大间隔学习；在线算法 1

抗震裕量分析（SMA） 1

抗震设计基准 1

水深分布 1

流体体积函数（VOF）法 1

浅层 1

海相沉积 1

火山凝灰岩 1

石炭系 1

组播 1

超设计基准地震 1

隔震 1

非晶Sm-Co膜，面内单轴各向异性，磁控溅射 1

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Improvement of part-load performance of gas turbine by adjusting compressor inlet air temperature and IGV opening

《能源前沿（英文）》 2022年第16卷第6期页码 1000-1016 doi: 10.1007/s11708-021-0746-z

摘要： A novel adjusting method for improving gas turbine (GT) efficiency and surge margin (SM) under part-load conditions is proposed. This method adopts the inlet air heating technology, which uses the waste heat of low-grade heat source and the inlet guide vane (IGV) opening adjustment. Moreover, the regulation rules of the compressor inlet air temperature and the IGV opening are studied comprehensively to optimize GT performance. A model and calculation method for an equilibrium running line is adopted based on the characteristic curves of the compressor and turbine. The equilibrium running lines calculated through the calculation method involve three part-load conditions and three IGV openings with different inlet air temperatures. The results show that there is an optimal matching relationship between IGV opening and inlet air temperature. For the best GT performance of a given load, the IGV could be adjusted according to inlet air temperature. In addition, inlet air heating has a considerable potential for the improvement of part-load performance of GT due to the increase in compressor efficiency, combustion efficiency, and turbine efficiency as well as turbine inlet temperature, when inlet air temperature is lower than the optimal value with different IGV openings. Further, when the IGV is in a full opening state and an optimal inlet air temperature is achieved by using the inlet air heating technology, GT efficiency and SM can be obviously higher than other IGV openings. The IGV can be left unadjusted, even when the load is as low as 50%. These findings indicate that inlet air heating has a great potential to replace the IGV to regulate load because GT efficiency and SM can be remarkably improved, which is different from the traditional viewpoints.

关键词： inlet air temperature inlet guide vane (IGV) opening part-load equilibrium running line gas turbine (GT) efficiency surge margin (SM)

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Integrating storm surge modeling with traffic data analysis to evaluate the effectiveness of hurricane

《结构与土木工程前沿（英文）》 2021年第15卷第6期页码 1301-1316 doi: 10.1007/s11709-021-0765-1

摘要： An integrated storm surge modeling and traffic analysis were conducted in this study to assess the effectiveness of hurricane evacuations through a case study of Hurricane Irma. The Category 5 hurricane in 2017 caused a record evacuation with an estimated 6.8 million people relocating statewide in Florida. The Advanced Circulation (ADCIRC) model was applied to simulate storm tides during the hurricane event. Model validations indicated that simulated pressures, winds, and storm surge compared well with observations. Model simulated storm tides and winds were used to estimate the area affected by Hurricane Irma. Results showed that the storm surge and strong wind mainly affected coastal counties in south-west Florida. Only moderate storm tides (maximum about 2.5 m) and maximum wind speed about 115 mph were shown in both model simulations and Federal Emergency Management Agency (FEMA) post-hurricane assessment near the area of hurricane landfall. Storm surges did not rise to the 100-year flood elevation level. The maximum wind was much below the design wind speed of 150–170 mph (Category 5) as defined in Florida Building Code (FBC) for south Florida coastal areas. Compared with the total population of about 2.25 million in the six coastal counties affected by storm surge and Category 1–3 wind, the statewide evacuation of approximately 6.8 million people was found to be an over-evacuation due mainly to the uncertainty of hurricane path, which shifted from south-east to south-west Florida. The uncertainty of hurricane tracks made it difficult to predict the appropriate storm surge inundation zone for evacuation. Traffic data were used to analyze the evacuation traffic patterns. In south-east Florida, evacuation traffic started 4 days before the hurricane’s arrival. However, the hurricane path shifted and eventually landed in south-west Florida, which caused a high level of evacuation traffic in south-west Florida. Over-evacuation caused Evacuation Traffic Index (ETI) to increase to 200% above normal conditions in some sections of highways, which reduced the effectiveness of evacuation. Results from this study show that evacuation efficiency can be improved in the future by more accurate hurricane forecasting, better public awareness of real-time storm surge and wind as well as integrated storm surge and evacuation modeling for quick response to the uncertainty of hurricane forecasting.

关键词： storm surge modeling traffic evacuation Hurricane Irma

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Denitrification performance and sulfur resistance mechanism of Sm–Mn catalyst for low temperature NH-SCR

《化学科学与工程前沿（英文）》 2023年第17卷第5期页码 617-633 doi: 10.1007/s11705-022-2258-8

摘要： MnO_x and Sm–Mn catalysts were prepared with the coprecipitation method, and they showed excellent activities and sulfur resistances for the selective catalytic reduction of NO_x by NH₃ between 50 and 300 °C in the presence of excess oxygen. 0.10Sm–Mn catalyst indicated better catalytic activity and sulfur resistance. Additionally, the Sm doping led to multi-aspect impacts on the phases, morphology structures, gas adsorption, reactions process, and specific surface areas. Therefore, it significantly enhances the NO conversion, N₂ selectivity, and sulfur resistance. Based on various experimental characterization results, the reaction mechanism of catalysts and the effect of SO₂ on the reaction process about the catalysts were extensively explored. For 0.10Sm–Mn catalyst, manganese sulfate and sulfur ammonium cannot be generated broadly under the influence of SO₂ and the amount of surface adsorbed oxygen. The Bronsted acid sites strengthen significantly due to the addition of SO₂, enhancing the sulfur resistance of the 0.10Sm–Mn catalyst.

关键词： MnO_x Sm–Mn catalyst NH₃-SCR sulfur resistance

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Experiment and surge analysis of centrifugal two-stage turbocharging system

HE Yituan, MA Chaochen

《机械工程前沿（英文）》 2008年第3卷第4期页码 365-368 doi: 10.1007/s11465-008-0073-7

摘要： To study a centrifugal two-stage turbocharging system’s surge and influencing factors, a special test bench was set up and the system surge test was performed. The test results indicate that the measured parameters such as air mass flow and rotation speed of a high pressure (HP) stage compressor can be converted into corrected parameters under a standard condition according to the Mach number similarity criterion, because the air flow in a HP stage compressor has entered the Reynolds number () auto-modeling range. Accordingly, the reasons leading to a two-stage turbocharging system’s surge can be analyzed according to the corrected mass flow characteristic maps and actual operating conditions of HP and low pressure (LP) stage compressors.

关键词： auto-modeling compressor Reynolds number characteristic standard condition

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Multi-color space threshold segmentation and self-learning k-NN algorithm for surge test EUT status

Jian HUANG,Gui-xiong LIU

《机械工程前沿（英文）》 2016年第11卷第3期页码 311-315 doi: 10.1007/s11465-016-0376-z

摘要：

The identification of targets varies in different surge tests. A multi-color space threshold segmentation and self-learning k-nearest neighbor algorithm (k-NN) for equipment under test status identification was proposed after using feature matching to identify equipment status had to train new patterns every time before testing. First, color space (L*a*b*, hue saturation lightness (HSL), hue saturation value (HSV)) to segment was selected according to the high luminance points ratio and white luminance points ratio of the image. Second, the unknown class sample S_r was classified by the k-NN algorithm with training set T_z according to the feature vector, which was formed from number of pixels, eccentricity ratio, compactness ratio, and Euler’s numbers. Last, while the classification confidence coefficient equaled k, made S_r as one sample of pre-training set T_z′. The training set T_z increased to T_z₊₁ by T_z′ if T_z′ was saturated. In nine series of illuminant, indicator light, screen, and disturbances samples (a total of 21600 frames), the algorithm had a 98.65% identification accuracy, also selected five groups of samples to enlarge the training set from T₀ to T₅ by itself.

关键词： multi-color space k-nearest neighbor algorithm (k-NN) self-learning surge test

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Fault classification and reconfiguration of distribution systems using equivalent capacity margin method

K. Sathish KUMAR, T. JAYABARATHI

《能源前沿（英文）》 2012年第6卷第4期页码 394-402 doi: 10.1007/s11708-012-0211-0

摘要： This paper investigates the capability of support vector machines (SVM) for prediction of fault classification and the use of the concept of equivalent capacity margin (ECM) for restoration of the power system. The SVM, as a novel type of machine learning based on statistical learning theory, achieves good generalization ability by adopting a structural risk minimization (SRM) induction principle aimed at minimizing a bound on the generalization error of a model rather than the minimization of the error on the training data only. Here, the SVM has been used as a classification. The inputs of the SVM model are power and voltage values. An equation has been developed for the prediction of the fault in the power system based on the developed SVM model. The next steps of this paper are the restoration and reconfiguration by using the ECM concept, the development of a code, and the testing of the results with various load outages, which have been executed for a 12 load system.

关键词： support vector machines (SVM) structural risk minimization (SRM) equivalent capacity margin (ECM) restoration fault classification

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(011)取向单晶衬底上生长的非晶Sm-Co薄膜的面内各向异性调控 Article

梁文会, 周厚博, 熊杰夫, 胡凤霞, 李佳, 张健, 王晶, 孙继荣, 沈保根

《工程（英文）》 2020年第6卷第2期页码 158-163 doi: 10.1016/j.eng.2019.11.010

摘要：

具有单轴面内各向异性的非晶Sm-Co薄膜在信息存储和自旋电子学领域中都具有广阔的应用前景。产生单轴面内各向异性的最有效方法是在薄膜沉积过程中施加面内磁场。然而，这种方法通常需要复杂的设备。本文中，我们报道了一种产生单轴面内各向异性的新方法，只需要将非晶Sm-Co薄膜生长在(011)取向的单晶衬底上，薄膜生长过程中不需要施加任何外部磁场。生长在LaAlO₃ (011)衬底上的非晶Sm-Co薄膜的各向异性常数k_A高达3.3×10⁴ J·详细分析表明，衬底各向异性应变引起的铁磁畴的择优生长，以及薄膜中Sm-Co、Co-Co取向对的有序化，在非晶Sm-Co薄膜单轴面内各向异性的产生上起到了重要作用。这项工作为在非晶Sm-Co薄膜中获得单轴面内各向异性提供了一种新方法。

关键词：非晶Sm-Co膜，面内单轴各向异性，磁控溅射

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Triage for management of cervical high-grade squamous intraepithelial lesion patients with positive margin

null

《医学前沿（英文）》 2017年第11卷第2期页码 223-228 doi: 10.1007/s11684-017-0517-8

摘要：

The objective of this study is to guide a triage for the management of cervical high-grade squamous intraepithelial lesion (HSIL) patients with positive margin by conization. Clinico-pathological data of HSIL patients with positive margin by conization were retrospectively collected from January 2009 to December 2014. All patients underwent secondary conization or hysterectomy within 6 months. The rate of residual lesion was calculated, and the factors associated with residual lesion were analyzed by univariate and multivariate analyses. Among a total of 119 patients, 56 (47.06%) patients presented residual HSIL in their subsequent surgical specimens, including 4 cases of invasive cervical carcinoma (3 stage IA1 and 1 stage IA2 patients). Univariate analysis showed that patient age>35 years (P=0.005), menopausal period>5 years (P=0.0035), and multiple-quadrant involvement (P=0.001) were significantly correlated with residual disease; however, multivariate analysis revealed that multiple-quadrant involvement (P=0.001; OR, 3.701; 95%CI, 1.496–9.154) was an independent risk factor for residual disease. Nearly half of HSIL patients with positive margin by conization were disease-free in subsequent surgical specimens, and those with multiple positive margins may consider re-conization or re-assessment.

关键词： cervical high-grade squamous intraepithelial lesion conization positive surgical margin hysterectomy

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Ye YUAN, Kai-ge QU, Li-ji WU, Jia-wei MA, Xiang-min ZHANG

《信息与电子工程前沿（英文）》 2019年第20卷第7期页码 930-945 doi: 10.1631/FITEE.1800312

摘要： SM3函数作为中国的哈希函数在国内具有很高市场价值。基于SM3的HMAC（HMAC-SM3）侧信道安全性依旧处于被评估阶段，尤其在硬件实现下的侧信道安全性更具研究价值。此外，SM3算法结构决定了HMAC-SM3侧信道分析难度。针对HMAC-SM3的硬件实现，提出一种技巧性的基于比特值的选择明文相关能量攻击策略。

关键词： HMAC-SM3；侧信道分析；相关能量攻击；基于比特值的选择明文

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IP组播路由协议的研究与实现

李炜

《中国工程科学》 2002年第4卷第1期页码 82-88

摘要：分析了协议独立的组播路由一稀疏模式（PIM-SM)的缺陷，提出多个会聚点（RPs)的PIM-SM的改进机制。多个RPs机制有效地提高了原有单个RP的PIM-SM协议的健壮性，有利于实现负载均衡、分类业务及提高系统的容错性能，并讨论多个RPs机制的开销问题。分析了 PIM-SM实现细节和组播技术的前景。

关键词：协议独立的组播路由一稀疏模式（PIM-SM) 多会聚点（RPs) 组播

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准西海相浅层石炭系火山凝灰岩油气发现的意义

王建勇,王学忠,马立群

《中国工程科学》 2012年第14卷第7期页码 81-86

摘要：

2011年，准西海相浅层石炭系火山凝灰岩油气勘探取得了突破，见到了良好的油气显示，特别是排61井在855.7～949.6 m井段，常规试油获得日产6 t的工业油流，50 ℃地面脱气原油黏度为390 mPa·s。排61地区石炭系稳定的海相沉积层既是深部油源岩，又是优质储集层。岩浆活动提供了火山岩储层发育和分布的基础。火山凝灰岩经受了强烈的风化作用和有机酸溶蚀作用，风化壳及次生裂缝很发育，成为优质储层。深部二叠系油气沿红车断裂带和地层超剥带不整合面向高部位运聚成藏。二叠系和三叠系致密的火山岩或泥岩沉积覆盖作为区域性盖层对石炭系油气后期保存至关重要。针对石炭系储层成像较差的难题发展了地震叠前时间偏移处理技术，火山岩地震和测井响应特征比较明显，应用成像测井和核磁共振技术实现了裂缝的定性识别和定量描述。

关键词：石炭系火山凝灰岩海相沉积浅层准噶尔盆地西缘

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基于最大间隔的贝叶斯分类器 Article

Tao-cheng HU,Jin-hui YU

《信息与电子工程前沿（英文）》 2016年第17卷第10期页码 973-981 doi: 10.1631/FITEE.1601078

摘要：概要：多分类学习中经常需要考虑在泛化性能和计算开销间进行权衡。本文提出一个生成式概率多分类器，综合考虑了泛化性和学习/预测速率。我们首先证明了我们的分类器具有最大间隔性质，这意味着对于未来数据的预测精度几乎和训练阶段一样高。此外，我们消除了目标函数中的大量的局部变元，极大地简化了优化问题。通过凸分析和概率语义分析，我们设计了高效的在线算法，与经典情形的最大不同在于这个算法使用聚集而非平均化处理梯度。实验证明了我们的算法具有很好的泛化性能和收敛速度。

关键词：多类学习；最大间隔学习；在线算法

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Molecular mechanisms and therapeutic strategies of vulnerable atherosclerotic plaques

Wen-Qiang CHEN MD, Yun ZHANG MD, PhD, FACC,

《医学前沿（英文）》 2010年第4卷第1期页码 36-42 doi: 10.1007/s11684-010-0020-y

摘要： Vulnerable atherosclerotic plaque rupture leading to thrombosis is the major cause of acute coronary syndrome (ACS). Studies on the pathophysiologic mechanism of both ACS and plaque stabilizing treatment are driving the development of animal models of vulnerable plaque. In our laboratory, we established animal models of plaque rupture and thrombosis in rabbits and mice that are similar to human plaque rupture. Potential mechanisms involved in plaque vulnerability were studied from the inflammation-immunity, proliferation-apoptosis, oxidative stress and biomechanics aspects. Imaging markers and biomarkers were used to detect vulnerable plaques, including high frequency duplex ultrasound, intravascular ultrasound (IVUS), intravascular ultrasound elastography, magnetic resonance imaging (MRI) and inflammatory markers. Effective gene and drug strategies to treat vulnerable plaques were explored.

关键词： vulnerable plaque animal models mechani-sm detection treatment

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基于VOF法的风暴潮洪水演进三维数值模拟

王晓玲,孙宜超,陈华鸿,杨丽美,孙蕊蕊

《中国工程科学》 2011年第13卷第12期页码 56-62

摘要：

为了提高风暴潮灾害应急处置能力，确保防潮安全，文章建立了耦合流体体积函数（VOF）法的三维非稳态水气两相流k－ε模型，采用等效糙率的方法处理城市密集建筑群，既考虑了其阻水作用，又考虑了其蓄水作用。针对天津市滨海新区海河与永定新河之间区域的风暴潮洪水演进数值模拟与分析，对100年一遇风暴潮洪水淹没情况进行分析，并对不同频率的风暴潮洪水的严重性进行了比较。结果表明，随着风暴潮发生频率的增加，风暴潮淹没范围逐渐减小，水深随着频率的增加是逐渐减少的，该研究为海堤安全管理、风暴潮灾害的快速科学评估提供了理论依据和技术支持。

关键词：风暴潮洪水演进流体体积函数（VOF）法三维k－ε紊流数学模型水深分布

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An approach to calculating allowable watershed pollutant loads

Yu GUO, Haifeng JIA

《环境科学与工程前沿（英文）》 2012年第6卷第5期页码 658-671 doi: 10.1007/s11783-012-0446-3

摘要： To improve the management of discharge pollutants loads in the reservoirs’ watershed, an approach of the allowable pollutants loads calculation and its allocation, based on the water environment model, was proposed. Establishment of the approach framework was described at first. Under the guidance of this framework, two major steps were as follows: modeling and scenario analysis were involved and should be applied to support the decision of discharge loads management; Environmental Fluid Dynamic Code (EFDC) model was selected as the kernel model in this framework. In modeling step, spatial discretization for establishing cell map in model, data preprocessing, parameter calibration and uncertainty analysis (which is considered as the significantly relevant factor of the margin of safety (MOS)), were conducted. As a result of the research, the model-based approach presented as a combination of estimation and precise calculation, which contributed to scenario analysis step. Some integrated modules, such as scenario simulation, result analysis and plan optimization were implemented as cycles in the scenario analysis. Finally, allowable pollutant loads under various conditions were calculated. The Chaihe Reservoir in Liaoning Province, China was used as a case study for an application of the approach described above. Results of the Chaihe reservoir water quality simulation, show good agreement with field data and demonstrated that the approach used in the present study provide an efficient and appropriate methodology for pollutant load allocation.

关键词： Source water protection watershed management pollutants load allocation Environmental Fluid Dynamic Code (EFDC) modeling margin of safety statistical analysis