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Numerical Simulation of Interaction Between Tributary Debris Flow and Main River

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四川大学学报（工程科学版） 2005年第S1期37卷 75-80页

作者： Zhang, Wanshun Cui, Peng Wang, Ying qiao, fei Wang, Xiekang School of Resource and Environmental Sci. Wuhan Univ. Wuhan 430072 China Inst. of Mountain Hazards and Environmental Disaster Chinese Academy of Sciences Chengdu 610041 China State Key Lab. of Hydraulics and Mountain River Eng. Sichuan Univ. Chengdu 610065 China

Based on two-phase flow theory and shallow water flow assumption,a mathematical model is applied to simulate debris *** model considers a two-phase mixture of sediments and water *** that the sediments and the water fluid move downstream with the same velocity,the flow of the mixture is described using a two dimensional depth averaged model with a unique 2-D momentum equation and two mass balance e- quations for the mixture and the sediments,*** finite volume method is used f...

关键词： Debris flow water flow confluence theory numerical simulation

Purification of carbazole by solvent crystallization under two forced cooling modes

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Chinese Journal of Chemical Engineering 2021年第7期34卷 173-179页

作者： Cui-Ping Ye Ya-fei qiao Rui-Nan Wang Wen-Ying Li College of Environmental Science and Engineering Taiyuan University of TechnologyJinzhong 030600China Training Base of State Key Laboratory of Coal Science and Technology Jointly Constructed by Shanxi Province and Ministry of Science and Technology Taiyuan University of TechnologyTaiyuan University of TechnologyTaiyuan 030024China

To identify the effect of solvents and anthracene on the purification of carbazole,the solvent crystallization of carbazole was investigated with xylene,chlorobenzene and tetrachloroethylene(TCE)as solvents under two forced circulation cooling(FCC)*** co-crystalline experimental data were obtained from runs carried out at different anthracene levels between 1%(mass)and 10%(mass).The results showed that a uniform flake carbazole crystal obtained when using xylene and chlorobenzene under the FCC-1 mode with gradual cooling ***,fine flake crystals grown under shock cooling of FCC-2 *** is beneficial to improving the purity of carbazole with chlorobenzene as solvent under cooling mode of *** could promote the growth of carbazole in solution,and it has a significant influence on the purification of carbazole.

关键词： Separation Solvent crystallization Forced circulation cooling Anthracene Carbazole

Implementation of low-swing differential interface circuits for high-speed on-chip asynchronous interconnection

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Science in China(Series F) 2008年第7期51卷 975-984页

作者： qiao fei YANG HuaZhong HUANG Gang WANG Hui NICS Group Department of Electronic Engineering Tsinghua University Beijing 100084 China

A novel low-swing interface circuit for high-speed on-chip asynchronous interconnection is proposed in this paper. It takes a differential level-triggered latch to recover digital signal with ultra low-swing voltage less than 50 mV, and the driver part of the interface circuit is optimized for low power using the driver-array method, With a capacity to work up to 500 MHz, the proposed circuit, which is simulated and fabricated using SMIC 0.18-pm 1.8-V digital CMOS technology, consumes less power than previously reported designs.

关键词： low power circuit low-swing interface differential signaling tapered-buffer interconnect asynchronous circuit

The Prediction of Daily Water Demand based on Fuzzy Neural Network with an Improved Levenberg-Marquardt Algorithm 36

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The Prediction of Daily Water Demand based on Fuzzy Neural N...

Breaking the energy-eficiency barriers for smart sensing applications with “Sensing with Computing” architectures

第36届中国控制会议

作者： Li Zhang Wen Jing Li Jun fei qiao Faculty of Information Technology Beijing University of Technology Beijing Key Laboratory of Computational Intelligence and Intelligent System

ISBN: (纸本)9781538629185

Short-term prediction of water demand provides basic guarantee of water supply system operation and *** this study,an effective model for daily water demand forecasting is ***,principle component analysis（PCA） is utilized to simplify the complexity and reduce the correlation between influence variables,and the score values of selected principle components（PCs） turn into the irrelevant input data of fuzzy neural network（FNN）,which models the prediction of water ***,an improved Levenberg-Marquardt（ILM） algorithm is employed to optimize the parameters of FNN ***-Hessian and gradient matrices could be calculated directly without the storage and multiplication of whole Jaccobian matrix,therefore the problems of heavy computing burden and limited memory space could be *** last,contrast experiments are implemented to demonstrate the fuzzy neural network with Levenberg-Marquardt algorithm（ILM-FNN）has better prediction performance and capability to handle practical issues.

关键词： PCA fuzzy neural network improved LM algorithm water demand forecasting

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Science China(Information Sciences) 2023年第10期66卷 162-177页

作者： Xinghua YANG Zheyu LIU Kechao TANG Xunzhao YIN Cheng ZHUO Qi WEI fei qiao Department of Electronic Engineering Tsinghua University College of Science Beijing Forestry University Make Sens AI Technology (Beijing) Co. Ltd. School of Integrated Circuits Peking University College of Information Science and Electronic Engineering Zhejiang University

With the developing technologies of artificial intelligence and the Internet of Things, intelligent IoT(iIoT) is prevailing currently. Design and implementation of integrated IoT nodes with continuous perception capability are indispensable to realize various smart terminal devices, which would also be vital to reduce the power consumption, improve the real-time performance, and enhance the security/privacy of the IoT system. In this paper, we present the architecture of “Sensing with Computing” and its chip design for smart sensing applications, which would support multi-modal perception signal processing with multi-dimension extension ability. Specially, we explore the analog/mixed-signal circuit designs and algorithm-hardware codesign methodologies for perception signal processing, and we also study the multi-modal integration of novel sensors and their interface technologies. Additionally, some multi-modal smart sensing systems with “Sensing+Computing in Memory” mixed-signal chips would be fabricated, which would support typical always-on smart sensing tasks.

关键词： low power consumption circuit design sensing with computing smart sensors edge computing multi-modal sensing

Hyponormality of Toeplitz Operators on the Dirichlet Space

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Journal of Mathematical Research and Exposition 2011年第6期31卷 1057-1063页

作者： qiao fei LU Tao YU Department of Mathematics Zhejiang Normal UniversityZhejiang 321004P.R.China

In this paper,we prove that the necessary and sufficient condition for a Toeplitz operator Tu on the Dirichlet space to be hyponormal is that the symbol u is constant for the case that the projection of u in the Dirichlet space is a polynomial and for the case that u is a class of special symbols,*** also prove that a Toeplitz operator with harmonic polynomial symbol on the harmonic Dirichlet space is hyponormal if and only if its symbol is constant.

关键词： Toeplitz operator hyponormality Dirichlet space harmonic Dirichlet space

Highly stable Eu-coordination polymer exhibiting the highest quantum yield

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Science China Chemistry 2023年第5期66卷 1400-1405页

作者： Ming-Yu Ye Ming-Xuan Zhang qiao-fei Xu Han Xu La-Sheng Long Lan-Sun Zheng State Key Laboratory of Physical Chemistry of Solid Surfaces and Department of Chemistry College of Chemistry and Chemical EngineeringXiamenUniversityXiamen361005China

Lanthanide luminescent materials with high quantum yield and thermal stability are of key importance for their practical *** we report crystal structures and luminescent properties of[Eu(pfbz)_(2)(phen)Cl](1)and[Tb(pfbz)2(phen)Cl](2)(pfbz=Pentafluorobenzoate).Single-crystal analysis reveals that both 1 and 2 crystallize in a polar space group of *** on their luminescent properties indicates that the solid-state quantum yields of 1 and 2 are 97.7%and 90.7%,respectively,while their efficiency of the sensitization process is as high as 100%,revealing that polar structures are more favorable to obtain high quantum *** analysis reveals that both 1 and 2 can be stable up to 240℃.More importantly,temperature-dependent luminescent spectra of 1 indicate its luminescent intensity at 612 nm only decreased by 5%from room temperature to 373 K,whereas at 373 K,its luminescent intensity remains almost constant for 36 *** that1 represents the highest quantum yield among known Eu-coordination polymers and its performance as the LED material is better than that of commercially widely used luminescent materials of(Sr,Ca)Al Si N3:Eu(630 nm)and(Sr,Ca)Al Si N3:Eu(640 nm),the present work provides an excellent substitute for commercial LED materials.

关键词： lanthanide coordination polymers luminescence LED materials

血栓弹力图在颅内动脉瘤栓塞术后抗血小板治疗中的应用价值

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中国实用神经疾病杂志 2025年第1期28卷 42-46页

作者：冯浩谯飞罗孝全任海波川北医学院附属南充市中心医院四川南充637000

目的探究血栓弹力图(TEG)在颅内动脉瘤(IA)栓塞术后抗血小板治疗中的应用价值。方法收集2021-01—2023-05在川北医学院附属南充市中心医院接受IA栓塞术的98例患者,按是否行TEG指导分为对照组(32例,采用标准双抗血小板治疗)和观察组(66例... 详细信息

目的探究血栓弹力图(TEG)在颅内动脉瘤(IA)栓塞术后抗血小板治疗中的应用价值。方法收集2021-01—2023-05在川北医学院附属南充市中心医院接受IA栓塞术的98例患者,按是否行TEG指导分为对照组(32例,采用标准双抗血小板治疗)和观察组(66例,采用TEG指导下抗血小板治疗),比较2组并发症、血小板聚集抑制率、凝血功能、神经功能以及预后。结果观察组术后出血率1.52%,显著低于对照组的15.63%(P0.05)。观察组花生四烯酸途径抑制率、二磷酸腺苷途径抑制率均显著高于对照组(P0.05)。结论TEG指导下抗血小板治疗在IA栓塞术后患者中应用可个性化指导抗血小板治疗药物剂量调整,减少出血事件,改善神经功能。

关键词：颅内动脉瘤血栓弹力图栓塞术抗血小板术后出血术后缺血

Self-templated nitrogen-doped mesoporous carbon decorated with double transition-metal active sites for enhanced oxygen electrode catalysis

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Rare Metals 2020年第7期39卷 824-833页

作者： Meng-fei qiao Ying Wang Lei Li Guang-Zhi Hu Guo-An Zou Xamxikamar Mamat Ye-Min Dong Xun Hu Key Laboratory of Chemistry of Plant Resources in Arid Regions Xinjiang Technical Institute of Physics and ChemistryChinese Academy of ScienceUrumqi 830011China College of Biological Chemical Sciences and EngineeringJiaxing UniversityJiaxing 314001China State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China School of Material Science and Engineering University of JinanJinan 250022China

The development of high-performance,low-cost bifunctional catalysts with long-term stability for the oxygen reduction reaction(ORR)and oxygen evolution reaction(OER)is one of the most critical challenges for the large-scale application of metal-air ***,we report an advanced nitrogen-doped mesoporous carbon(NMC)composite(NiCo2O4/CoNx-NMC)formed from a mixture of Co-and Ni-hydroxide-infiltrated phenolic resin and melamine *** composite exhibits superior electrocatalytic activity,stability,and selectivity for the ORR and *** activity parameter(DE),which is an indicator of the overall catalytic activity of bifunctional catalysts,was 0.76 V for NiCo2O4/***,catalyst outperforms the majority of previously reported non-precious metal-based bifunctional *** remarkable ultra-high catalytic performance of NiCo2O4/CoNx-NMC for the ORR and OER can be attributed to the presence of different active sites of the CoNx structure and the formation of NiCo2O4 with the spinel structure,which was obtained by a stepwise pyrolysis *** synthesis strategy opens a new avenue for the rational design of highly active bifunctional electrocatalysts.

关键词： Bifunctional catalysis Oxygen reduction reaction Oxygen evolution reaction Pyrolysis strategy Double active sites