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Control Method for Additional Damper in Hydro-turbine Speed Governor of Hydro-dominant Power Systems

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CSEE Journal of Power and Energy Systems 2023年第2期9卷 589-598页

作者： Guanhong Wang Yong tang Ying Li Dongping Ai Gang Chen wei wei Department of Power System China Electric Power Research InstituteBeijing 100192China Department of Power System Technology State Grid Sichuan Electric Power Research InstituteChengdu 610072China

With the rapid development of the national interconnected power grid,fast automatic excitation regulators and fast turbine governors are being widely *** the current systems,some power plants adjust their responses for turbine governor systems to a very sensitive level to meet the primary frequency regulation assessment index,which actively brings about negative *** these circumstances,the ultralow frequency oscillation(ULFO)phenomenon emerged in hydrodominant power *** order to solve the problem of ULFO,the hydro-turbine governor additional damper(GAD)based on phase compensation,which adapts to ULFO,is *** design of the control system is relatively *** a phase compensation based on the field testing and modeling of the turbine governor,GAD can provide the power system with positive damping,which contributes to the stability and security of the *** to the impact of the mechanism of the turbine governor on the dynamic stability of the power system and the research of modeling and parametric testing,the proposed method not only supports positive damping,but also eliminates the negative damping of the speed governing system,which can significantly suppress the ultralow frequency oscillation and make it feasible to configure the GAD parameters according to field testing.

关键词： Governor additional damper phase compensation power system ULFO

凋亡抑制因子Survivin siRNA荧光表达载体的构建

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遵义医学院学报 2008年第6期31卷 565-567,570页

作者：唐薇薇郑洪王琳琳厉国慧岳昌武姚宁遵义医学院附属医院病理科贵州遵义563003

目的构建靶向survivin siRNA真核表达质粒载体,通过RNA干扰技术阻断survivin基因的表达。方法针对目的基因survivin序列设计双链DNA(dsDNA),采用DNA重组技术与载体连接,转化感受态细胞经诱导表达筛选阳性克隆子。结果重组质粒经酶切、... 详细信息

目的构建靶向survivin siRNA真核表达质粒载体,通过RNA干扰技术阻断survivin基因的表达。方法针对目的基因survivin序列设计双链DNA(dsDNA),采用DNA重组技术与载体连接,转化感受态细胞经诱导表达筛选阳性克隆子。结果重组质粒经酶切、测序鉴定,证实插入载体目的基因片段大小与插入方向正确,且转染至肿瘤细胞,可见其发出绿色荧光,转染率为70%-80%。结论靶向survivin-siRNA真核表达载体pGU6/GFP/Neo/survivin-siRNA可用于转染肿瘤细胞、阻断survivin基因表达并诱导细胞凋亡的RNA i实验研究,为肿瘤的基因治疗奠定一定的基础。

关键词： survivin 基因重组 RNAi

Modeling and Prediction of Fatigue Properties of Additively Manufactured Metals

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Acta Mechanica Solida Sinica 2023年第2期36卷 181-213页

作者： wei tang Ziming tang Wenjun Lu Shuai Wang Min Yi State Key Lab of Mechanics and Control of Mechanical Structures&Institute for Frontier Science&Key Lab for Intelligent Nano Materials and Devices of Ministry of Education&College of Aerospace Engineering Nanjing University of Aeronautics and Astronautics(NUAA)Nanjing 210016China Department of Mechanical and Energy Engineering Southern University of Science and TechnologyShenzhen 518055China

Additive manufacturing(AM)has emerged as an advanced technique for the fabrication of complex near-net shaped and lightweight metallic parts with acceptable mechanical *** strength of AM metals has been confirmed comparable or even superior to that of metals manufactured by conventional processes,but the fatigue performance is still a knotty issue that may hinder the substitution of currently used metallic components by AM counterparts when the cyclic loading and thus fatigue failure *** essential complements to high-cost and time-consuming experimental fatigue tests of AM metals,models for fatigue performance prediction are highly *** this review,different models for predicting the fatigue properties of AM metals are summarized in terms of fatigue life,fatigue limit and fatigue crack growth,with a focus on the incorporation of AM characteristics such as AM defect and processing parameters into the *** predicting the fatigue life of AM metals,empirical models and theoretical models(including local characteristic model,continuum damage mechanics model and probabilistic method)are *** terms of fatigue limit,the introduced models involve the Kitagawa–Takahashi model,the Murakami model,the El-Haddad model,*** modeling the fatigue crack growth of AM metals,the summarized methodologies include the Paris equation,the Hartman-Schijve equation,the NASGRO equation,the small-crack growth model,and numerical *** of these models for AM metals are similar to those for conventionally processed materials,but are modified and pay more attention to the AM ***,an outlook for possible directions of the modeling and prediction of fatigue properties of AM metals is provided.

关键词： Additive manufacturing Fatigue properties Metals Modeling and prediction Microstructure

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临床医师个人绩效考核指标体系的构建

解放军医院管理杂志 2013年第6期20卷 587-589页

作者：雷震张波唐蔚蔚万方查丹王建昌空军总医院质量管理科北京100142 北京协和医院北京100022 空军总医院北京100142

目的新医改背景下,构建军队医院临床医师个人绩效考核指标体系具有重要意义。方法采用海氏系统法开展岗位评价,运用专家咨询法筛选投入-产出KPI指标,按照指标与经济效益关联性设置权重,以确保数量和效率价值。结果模型拟合得到各级指标... 详细信息

目的新医改背景下,构建军队医院临床医师个人绩效考核指标体系具有重要意义。方法采用海氏系统法开展岗位评价,运用专家咨询法筛选投入-产出KPI指标,按照指标与经济效益关联性设置权重,以确保数量和效率价值。结果模型拟合得到各级指标量化取值方法和数据模型。结论从岗位专业能力、考勤、工作负荷、质量效率和效益5个维度的指标体系,构建量化数据模型。

关键词：临床医师绩效管理

Structural and magnetic properties of Sm(Co_(0.7)Fe_(0.1)Ni_(0.12)Zr_(0.04)B_(0.04))_(7.5) melt spun isotropic and anisotropic ribbons

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Journal of Rare Earths 2012年第7期30卷 691-695页

作者： Sofoklis S. Makridis wei tang Department of Mechanical Engineering University of Western Macedonia GR-50100 Kozani Greece Division of Materials Sciences & Engineering Ames Lab of DOE Iowa State University Ames IA 450011 USA

We investigated the structural and magnetic properties of Sm（Co0.7Fe0.1Ni0.12Zr0.04B0.04）7.5 melt spun ribbons. Samples were arc melted then melt spun at 37 m/s up to 55 m/s to obtain ribbon for powdering. Annealing was performed in argon atmosphere for 30- 75 min at 600-870 oC. In as-spun ribbons the hexagonal SmCo7 （TbCu7-type of structure） of crystal structure was determined from x-ray diffraction patterns, while fcc-Co has been identified as a secondary phase. After annealing, the 1：7 phase of the as-spun ribbons transformed into 2：17 and 1：5 phases. X-ray patterns for as-milled powders exhibited very broad peaks making it difficult to identify a precise structure but repre-sented the 1：7 structure after annealing at low temperature （650 oC）. TEM analysis showed a homogeneous nanocrystalline microstructure with average grain size of 30-80 nm. Coercivity values of 15-27 kOe were obtained from hysteresis loops traced up to a field of 5 T. The co-ercivity decreased as temperature increases, but it maintained values higher than 5 kOe at 380 oC. The maximum energy product at room temperature increased, as high as 7.2 MGOe, for melt-spun isotropic ribbons produced at higher wheel speeds. Anisotropic ribbons had a maximum energy product close to 12 MGOe.

关键词： melt-spinning microstructure rare-earth permanent magnet coercivity

The anisotropy of hexagonal close-packed iron under inner core conditions: the effect of light elements

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Earth and Planetary Physics 2022年第4期6卷 399-423页

作者： wei Zhang Mei tang Zhenwei Niu Laboratory for Extreme Conditions Matter Properties Southwest University of Science and TechnologyMianyang Sichuan 621010China Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory Southwest University of Science and TechnologyMianyang Sichuan 621010China School of National Defense Science&Technology Southwest University of Science and TechnologyMianyang Sichuan 621010China

In recent decades,global seismic observations have identified increasingly complex anisotropy of the Earth’s inner *** seismic studies have confirmed hemispherical variations in the inner core’s ***,based on ab initio molecular dynamics calculations,we report how the anisotropy of hexagonal close-packed(hcp)-iron,under inner core conditions,could be altered when alloyed with light *** find that light elements in binary allows with iron-hcp-Fe-X(X=C,O,Si,and S)-could have significant effects on density,sound velocities,and anisotropy,compared with the behavior of pure hcp-iron;the anisotropy of these binary alloys depends on combined effects of temperature and the particular alloying light ***,the change in anisotropy strength with increasing temperature can be charted for each *** pure iron with some light elements such as C or O actually does not increase but decreases core anisotropy at high *** the light element S can significantly enhance the elastic anisotropy strength of hcp-Fe.

关键词： iron elastic constants anisotropy inner core

A Numerical Calculation Algorithm of the Inclination Function Based on the Representation of SO(3) Group

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Acta Mathematicae Applicatae Sinica 2024年第1期40卷 137-148页

作者： Yu-xiao wei Wen-lin tang Department of Geophysics School of Geology Engineering and GeomaticsChang’An UniversityXi’an710064China Key Laboratory of Electronics and Information Technology for Space Systems National Space Science CenterChinese Academy of SciencesBeijing100190China

In the determination of the Earth gravity field in satellite geodesy, the inclination functions represent the projection of data observed along the orbital plane of a satellite orbit into the sphere in the terrestial reference frame. The inclination functions in this work is studied from a group theoretical perspective. The inclination functions are proved to generate a representation of the SO(3) group. An orthogonal relation of the inclination functions is derived and some recurrence relations for the inclination functions are given, based on which an algorithm to calculate the inclination functions is proposed.

关键词： SO(3)group inclination function satellite geodesy representation of SO(3)

PokerNet:Expanding Features Cheaply via Depthwise Convolutions

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International Journal of Automation and computing 2021年第3期18卷 432-442页

作者： wei tang Yan Huang Liang Wang National Laboratory of Pattern Recognition(NLPR) Institute of AutomationChinese Academy of SciencesBeijing 100190China Center for Research on Intelligent Perception and Computing(CRIPAC) Institute of AutomationChinese Academy of SciencesBeijing 100190China

Pointwise convolution is usually utilized to expand or squeeze features in modern lightweight deep ***,it takes up most of the overall computational cost(usually more than 90%).This paper proposes a novel Poker module to expand features by taking advantage of cheap depthwise *** a result,the Poker module can greatly reduce the computational cost,and meanwhile generate a large number of effective features to guarantee the *** proposed module is standardized and can be employed wherever the feature expansion is *** varying the stride and the number of channels,different kinds of bottlenecks are designed to plug the proposed Poker module into the ***,a lightweight model can be easily *** conducted on benchmarks reveal the effectiveness of our proposed Poker *** our Poker Net models can reduce the computational cost by 7.1%-15.6%.Poker Net models achieve comparable or even higher recognition accuracy than previous state-of-the-art(SOTA)models on the Image Net ILSVRC2012 classification *** is available at https://***/diaomin/pokernet.

关键词： Deep learning depthwise convolution lightweight deep model model compression model acceleration

血清蛋白指纹图谱检测对儿童支原体肺炎早期诊断的研究

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中外医疗 2017年第13期36卷 4-8页

作者：严红梅阮琰林伟唐伟伟熊丽君黄明翔翁丽珍福建省医科大学临床教学医院福建省福州肺科医院儿科福建福州350008

目的用表面增强激光解析电离飞行时间质谱(SELDI-TOF-MS)技术和蛋白质芯片技术检测儿童支原体肺炎(MPP)和非MPP患者血清蛋白指纹图谱,探讨基于人工神经网络的的蛋白指纹图谱诊断模型对儿童MPP早期诊断的价值。方法用SELDI-TOF-MS技术和... 详细信息

目的用表面增强激光解析电离飞行时间质谱(SELDI-TOF-MS)技术和蛋白质芯片技术检测儿童支原体肺炎(MPP)和非MPP患者血清蛋白指纹图谱,探讨基于人工神经网络的的蛋白指纹图谱诊断模型对儿童MPP早期诊断的价值。方法用SELDI-TOF-MS技术和蛋白质芯片技术测定2014年11月—2016年6月该院儿科住院的130例血清标本的蛋白指纹图谱,其中MPP 68例,非MPP 62例。将测定的血清蛋白指纹图谱建立人工神经网络预测模型,用随机抽取的75例标本(MPP 40例,非MPP 35例)作为训练组,进行训练与交叉验证,另外55例标本(MPP 28例,非MPP 27例)作为测试组,进行盲法验证该模型。结果利用从75例训练组得出的基于人工神经网络的由M/Z为4 094.91、4 650.51、5 825.38、6 031.77、7 862.79、10 122.04组成的MPP血清蛋白指纹图谱决策树诊断模型,对MPP诊断的敏感性95.00%(38/40),特异性为88.57%(31/35),阳性率为92.00%(69/75),ROC曲线下面积为0.975,利用测试组的55例标本对模型进行验证,结果显示,对MPP诊断的敏感性89.29%(25/28),特异性为96.30%(26/27),阳性率为92.27%(51/55)。结论该研究建立的支原体肺炎蛋白指纹图谱诊断模型对支原体肺炎的检测时间短,诊断准确率高,有助于诊断支原体肺炎。

关键词：蛋白指纹图谱技术实验室诊断技术儿童支原体肺炎