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Regularization of mathematical model for chip flow angle catastrophe

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Advances in Manufacturing 2021年第4期9卷 568-579页

作者： shao-Nan Zhang Dong-Dong Cheng Liang-Shan xiong School of Mechanical Science and Engineering Huazhong University of Science and TechnologyWuhan 430074People’s Republic of China

The chip flow angle(CFA)catastrophe in double-edged cutting results in a significant reduction in the cutting force,which can benefit the ***,established potential functions(i.e.,cutting power calculation functions)of mathematical models for the CFA catastrophe are presented in the form of transcendental functions with two control parameters and one state parameter,which are extremely complex.A method is proposed herein to realize the regularization of the potential functions and establish mathematical models in a standard form and with complete content for the CFA *** this method,the potential function of the CFA catastrophe is expanded into a k-order Taylor polynomial at each midpoint of N end-to-end equally partitioned intervals of the state parameter using the Taylor function provided in *** potential function after piecewise Taylor expansion is transformed into the same form as the potential function of the standard cusp catastrophe model by truncating the first five terms of the Taylor polynomial and eliminating the third-order term of the state parameter with elementary ***,the regularization of potential function is ***,the regularization of equilibrium surface and bifurcation set can be realized based on the conclusions of the catastrophe *** errors of the potential function,equilibrium surface,and bifurcation set are defined to evaluate the effectiveness of this regularization *** problem of calculating regularization errors is regarded as an optimization ***‘‘simulannealbnd’’function provided in MATLAB is used to solve the *** the proposed method,the regularization of a mathematical model for the CFA catastrophe established by the predecessor is completed;a mathematical model(i.e.,standard cusp catastrophe model)in a standard form and with complete content for the CFA catastrophe is established;and the corresponding regularization errors

关键词： Chip flow angle(CFA)catastrophe Mathematical model Regularization Potential function Catastrophe theory Cusp catastrophe model

Easy Fabrication of Dense Ceramic Membrane for Oxygen Separation

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Chinese Chemical Letters 2000年第10期11卷 937-940页

作者： shao, ZP xiong, GX Yang, WS Chinese Acad Sci Dalian Inst Chem Phys State Key Lab Catalysis Dalian 116023 Peoples R China

A combined EDTA-citrate complexing method was developed for the easy preparation of mixed oxygen-ionic and electronic conducting dense ceramic membrane for oxygen separation. The nea method takes the advantage of lower calcination temperature for phase formation. lower membrane sintering temperature and higher relative density over the standard ceramic method.

关键词： ceramic membrane oxygen separation synthesis

Remission of new-onset type 2 diabetes mellitus in an adolescent using an integrative medicine approach:A case report

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Journal of Integrative Medicine 2021年第1期19卷 85-88页

作者： Baoyi shao Saiying hou Yuenyan Chan Changchun shao Lixing Lao Clinical Division Beijing Changchun Hospital of Traditional Chinese MedicineBeijing 100123China Virginia University of Integrative Medicine FairfaxVA 2203USA

Among adolescents,the incidence of type 2 diabetes mellitus(T2 DM)has recently increased.A 12-yearold Chinese boy with a one-year history of hyperphagia presented to our *** patient was diagnosed with T2 DM one month prior to visiting the clinic and reported undergoing no pharmacologic *** an integrative medicine approach,including Chinese herbal decoction,berberine hydrochloride tablets,physical exercise and diet control,the patient's fasting blood glucose(FBG)decreased from 8.3 mmol/L to 5.5 mmol/***,his glycated haemoglobin decreased from12.9%to 6.1%,indicating that without any Western medicine intervention his diabetes has been reversed after six months of *** FBG remained normal,and nine months after completion of treatment it was 4.9 mmol/L.A potential mechanism in this response may be related to improved insulin resistance and b-cell function,as indicated by observed changes in homeostasis model assessment of insulin resistance and b-cell ***,weight loss may also have contributed to the effectiveness of the *** case study is the first to present the innovative approach of integrative medicine to achieve remission of new-onset adolescent T2 DM.

关键词： Type 2 diabetes mellitus Integrative medicine Traditional Chinese medicine Case report

Margolus-Levitin speed limit across quantum to classical regimes based on trace distance

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Chinese Physics B 2020年第5期29卷 80-84页

作者： shao-xiong Wu Chang-Shui Yu School of Science North University of ChinaTaiyuan 030051China School of Physics Dalian University of TechnologyDalian 116024China

The classical version of Mandelstam-Tamm speed limit based on theWigner function in phase space was reported by Shanahan et al.[***.120070401(2018)].We present the Margolus-Levitin speed limit across the quantumto-classical transition in phase space based on the trace *** Margolus-Levitin speed limit is set by the Schatten L1 norm of the generator of time-dependent evolution for both the quantum and classical *** an example,the time-dependent harmonic oscillator is considered to illustrate the result.

关键词： quantum speed limit Wigner function phase space Margolus-Levitin bound

Guinier-Preston Zone,Quasicrystal and Long-period Stacking Ordered Structure in Mg-based Alloys,A Review

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Acta Metallurgica Sinica(English Letters) 2013年第3期26卷 217-231页

作者： Yongbo XU Daokui XU Xiaohong shao En-hou HAN State Key Laboratory for Corrosion and Protection Institute of Metal Research Chinese Academy of Sciences Shenyang National Laboratory for Materials Science

Both the solid solution and precipitation are mainly strengthening mechanism for the magnesium-based alloys. A great number of alloying elements can be dissolved into the Mg matrix to form the solutes and ***, the type of precipitates varies with different alloying elements and heat treatments, which makes it quite difficult to understand the formation mechanism of the precipitates in Mg-based alloys in depth. Thus, it is very hard to give a systematical regularity in precipitation process for the Mg-based alloys. This review is mainly focused on the formation and microstructural evolution of the precipitates, as a hot topic for the past few years, including Guinier-Preston Zones, quasicrystals and long-period stacking ordered phases formed in a number of Mg-TM-RE alloy systems, where TM = Al, Zn, Zr and RE = Y,Gd, Hd, Ce and La.

关键词： Guinier-Preston zone Quasicrystal Long-period stacking ordered structure Mg-based alloy

Diffusion and catalyst efficiency in hierarchical zeolite catalysts

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National Science Review 2020年第11期7卷 1726-1742页

作者： Peng Peng xiong-hou Gao Zi-Feng Yan Svetlana Mintova State Key Laboratory of Heavy Oil Processing China University of Petroleum Laboratory of Catalysis and Spectrochemistry (LCS) Normandy University National Graduate School of Engineering of Caen (ENSICAEN)University of Caen (UNICAEN) French National Center for Scientific Research (CNRS) Petrochemical Research Institute China National Petroleum Company

The preparation of hierarchical zeolites with reduced diffusion limitation and enhanced catalyst efficiency has become a vital focus in the field of zeolites and porous materials chemistry within the past decades. This review will focus on the diffusion and catalyst efficiency of hierarchical zeolites and industrial catalysts. The benefits of diffusion and catalyst efficiency at two levels of hierarchies (zeolitic component level and industrial catalyst level) from a chemical reaction engineering point of view will be analysed. At zeolitic component level, three types of mesopores based on the strategies applied toward enhancing the catalyst effectiveness factor are presented:(i)‘functional mesopores’(raising effective diffusivity);(ii)‘auxiliary mesopores’(decreasing diffusion length); and (iii)‘integrated mesopores’(a combination thereof). At industrial catalyst level, location and interconnectivity among the constitutive components are *** hierarchical pore interconnectivity in multi-component zeolite based industrial catalysts is exemplified by fluid catalytic cracking and bi-functional hydroisomerization catalysts. The rational design of industrial zeolite catalysts at both hierarchical zeolitic component and catalyst body levels can be fully comprehended using the advanced in situ and/or operando spectroscopic, microscopic and diffraction techniques.

关键词： diffusion effectiveness factor pore connectivity hierarchical zeolite industrial catalyst advanced characterization

Probing the interseismic locking state of the Xianshuihe fault based on a viscoelastic deformation model

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Science China Earth Sciences 2024年第1期67卷 134-145页

作者： Yage ZHU Faqi DIAO Fei CHEN Yuebing WANG Zhigang shao Rongjiang WANG xiong xiong Hubei Subsurface Multi-Scale Imaging Key Laboratory School of Geophysics and GeomaticsChina University of GeosciencesWuhan 430074China China Earthquake Networks Center Beijing 100045China Institute of Earthquake Forecasting China Earthquake AdministrationBeijing 100036China

The interseismic locking state of tectonic faults is essential for regional seismic hazard ***,it is challenging to obtain this parameter reliably due to the weak deformation and complex model *** better probe the fault locking state,more reliable physical models and well-covered observations are *** we investigate the locking state of the Xianshuihe fault based on a new-developed viscoelastic deformation ***,we combine GPS velocities from 13 new near-field stations and existing stations in this region to improve the spatial *** to the theoretical predictions,our results indicate that the elastic model will clearly overestimate the fault locking depth and seismic moment accumulation rate,and the fault slip rate inferred from the elastic model is slightly lower than that from the viscoelastic *** on the locking distribution inferred from the viscoelastic model,we identify four potential asperities on the Xianshuihe *** importantly,we find a clear spatial correlation between the fault locking distribution and the rupture extent of historical earthquakes,which indicates that the fault locking state may control the rupture extent and thus the magnitude of *** addition,our results show that the 2022 M6.8 Luding earthquake only ruptured the south part of a potential asperity,and the accumulated energy in the northern unruptured area is equivalent to an Mw6.9 earthquake,where the seismic hazard deserves special attention.

关键词： Fault kinematics Viscoelastic relaxation effect GPS observations Seismic hazard The 2022 M6.8 Luding earthquake

Investigation and Application on the Vertical Vibration Models of the Seated Human Body

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Automotive Innovation 2018年第3期1卷 263-271页

作者： xiong shao Nan Xu Xiang Liu Advanced Product Development Department Dongfeng Commercial Vehicle Technical CenterNo.10 Dongfeng RoadWuhan 430056China College of Automotive Engineering Jilin UniversityChangchun 130000China

Investigation of the vertical vibration characteristics of the seated human body is beneficial for the design and development of vehicle ride *** this study,we first established models of the seated human body with two,three and four degrees of freedom(DOF).Then,the vibration characteristics of 30 volunteers were tested under standard conditions with a vibration test rig to obtain data for the apparent mass,driving point mechanical impedance,and seat-to-head transfer *** on the experimental data,the parameters of these models are identified and the results show that the four-DOF model can simulate the vertical vibration characteristics of the seated human body more ***,different seated human body models were applied to optimize the damping of shock *** results show that the optimized damping with the four-DOF Chinese seated human body model is 27%more than that with rigid mass and 7%less than that with ISO 5982:2001 seated human body model.

关键词： Seated human body model Apparent mass Driving point mechanical impedance Seat-to-head transfer function Optimization design of damping

Finite Size Effect on the in-Medium Chiral Condensate at Finite Density

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Chinese Physics Letters 2014年第4期31卷 18-21页

作者： XIA Cheng-Jun PENG Guang-xiong hou Jia-Xun School of Physics University of Chinese Academy of Sciences Beijing 100049 Theoretical Physics Center for Science Facilities Institute of High Energy Physics Beijing 100049

The in-medium quark condensate is studied with an equivalent quark mass approach that has the advantage of no need for extra assumptions on the current mass derivatives of model parameters with respect to the quark current mass. It is found that the ratio of the quark condensate in a medium to that in a vacuum depends not only on density but also on the finite size. With decreasing volume, it decreases to a minimum, and then saturates at a radius of about 1 fro. The condensate approaches to its bulk value when the volume becomes infinitely large, and it decreases finearly with increasing density if the density is extremely low.

关键词： QUARKS QUANTUM chromodynamics HAMILTONIAN systems THERMODYNAMICS BARYONS