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Erosion Behaviour of TiNi Alloy Foils under Various Heat Treatments

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Journal of Materials Science & Technology 1996年第4期12卷 286-290页

作者： Liang, YN wang, ZC Li, SZ si, ZY CHINESE ACAD SCI INST MET RESSHENYANG 110015PEOPLES R CHINA

The erosion behaviour of TiNi alloy foils (Ni: 50.5 at pct, thickness: 70-90 mu m) under various heat treatments has been studied with two different tests: sand-blasting erosion (SBE) with impingement angle of 30 degrees and slurry erosion (SE). The erosion resistance of the foils aged at 400-450 degrees C/30 min is the best in all tests. The quenched foil is also good in the SBE test, but not so good in the SE test. The slurry-erosion resistance of the aged foils is better than that of L214 with high hardness. All the foils exhibit much better erosion resistance than 18Cr-8Ni stainless steel in the tests.

关键词： Metal foil

Vocal repertoire of Azure-winged Magpies(Cyanopica cyanus):A context-associated communication system

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Avian Research 2023年第1期14卷 45-53页

作者： Xu wang Fan Yu Haozhong si Zhongqiu Li Laboratory of Animal Behaviour and Conservation School of Life SciencesNanjing UniversityNarying 20023Chine

signals within animals’vocal communication are considered functional referential and *** in the absence of the context,receivers are expected to acquire the information of calls and respond specificallyWhereas the framework was supported by plenty of evidence,its exhaustivity in describing all animal vocalisations has been ***,we investigated the vocal repertoire of a cooperatively breeding species,Azure-winged Magpie(Cyanopica cyanus),to present evidence for referential *** results showed that Azure-winged Magpies had a relatively large vocal repertoire,consisting of twelve distinct *** calls were associated with the context including movement,begging for food,contact,vigilance against predators,***,even the predator-specific alarm calls would induce various responses of *** implies that multiple pieces of information are involved in the vocalisation,which could be utilised by the receiver to select an appropriate response based on the *** study gives a detailed description of the context and function of the vocal repertoire in Azure-winged Magpies,laying the foundation for further investigation on the developmental mechanisms of bird *** study also suggests that the referential signals of animal vocalisations may not be limited to the context-specific responses of receivers and need to be discussed from a broader perspective.

关键词： Amure wingeod Magpies Behavioural ontext Reerential sigmals Vocal ammumication Vocal repertoire

Nomograms for Predicting Cancer-Specific Survival of Patients with Gingiva Squamous Cell Carcinoma:A Population-Based Study

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Current Medical Science 2021年第5期41卷 953-960页

作者： si-si YANG Xiao-huan ZHONG Hui-xin wang An-jie MIN Wei-ming wang Department of Oral and Maxillofacial Surgery Center of StomatologyXicmgya HospitalCentral South UniversityChangsha 410008China Department of Orthodontics Center of StomatologyXiangya Hospital of Central South UniversityChangsha 410008China

The use of the traditional American Joint Committee on Cancer(AJCC)staging system alone has limitations in predicting the survival of gingiva squamous cell carcinoma(GSCC)*** aimed to establish a comprehensive prognostic nomogram with a prognostic value similar to the AJCC ***:Patients were identified from SEER *** were selected by a backward stepwise selection method in a Cox regression model.A nomogram was used to predict cancer-specific survival rates for 3,5 and 10 years in patients with *** basic features of model validation were used to evaluate the performance of the survival model:consistency index(C-index),receiver operating characteristic(ROC)curve,calibration chart,net weight classification improvement(NRI),comprehensive discriminant improvement(IDI)and decision curve analysis(DCA).Results:Multivariate analyses revealed that age,race,marital status,insurance,AJCC stage,pathology grade and surgery were risk factors for *** particular,the C-index,the area under the ROC curve(AUC)and the calibration plots showed good performance of the *** to the AJCC system,NRI and IDI showed that the nomogram has improved ***,the nomogram's 3-year and 5-year and 10-year DCA curves yield net benefits higher than traditional AJCC,whether training set or a validation ***:We developed and validated the first GSCC prognosis nomogram,which has a better prognostic value than the separate AJCC staging ***,the nomogram of this study is a valuable tool for clinical practice to consult patients and understand their risk for the next 3,5 and 10 years.

关键词： nomogram SEER gingiva squamous cell carcinoma cancer-specific survival population-based study

Statistical properties of radio flux densities of solar flares

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Research in Astronomy and Astrophysics 2020年第11期20卷 239-251页

作者： Lu wang si-Ming Liu Zong-Jun Ning Purple Mountain Observatory Nanjing 210000China Key Laboratory of Dark Matter and Space Astronomy Nanjing 210000China University of Science and Technology of China Heifei 100049China

Short timescale flux variations are closely related to the energy release process of magnetic reconnection during solar *** light curves at 1,2,3.75,9.4,and 17 GHz of 209 flares observed by the Nobeyama Radio Polarimeter from 2000 to 2010 are analyzed with a running smooth *** find that the impulsive component(with a variation timescale shorter than 1 s)of 1 GHz emission of most flares peaks at a few tens of solar flux unit and lasts for about 1 minute and the impulsive component of 2 GHz emission lasts a shorter period and peaks at a lower flux level,while at the three high frequency channels the occurrence frequency of flares increases with the decrease of the flux density up to the noise level of the corresponding ***,the gradual components of these emissions have similar duration and peak flux density *** also derive the power spectrum on different timescales and a normalized wavelet analysis is used to confirm features on short *** a time resolution of 0.1 s,more than^60%of these radio light curves show significant flux variation on 1 s or shorter time *** fraction increases with the decrease of frequency and reaches^100%at 1 GHz,implying that short timescale processes are universal in solar *** also study the correlation between the impulsive radio flux densities and soft X-ray fluxes obtained with the GOES satellites and find that more than 65%of the flares with an impulsive component have their impulsive radio emission reach a peak value ahead of the soft X-ray fluxes and this fraction increases with the radio frequency.

关键词： methods data analysis Sun flares Sun radio radiation

Taxing sugar-sweetened beverages in China:By volume or sugar content? A consumer welfare approach

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Journal of Integrative Agriculture 2024年第12期23卷 4237-4249页

作者： Tianchang Zhai Jingjing wang Lei Li Wei si Rural Development Institute Chinese Academy of Social SciencesBeijing 100732China College of Economics and Management China Agricultural UniversityBeijing 100083China Academy of Global Food Economics and Policy China Agricultural UniversityBeijing 100083China College of Economics and Management Zhejiang A&F UniversityHangzhou 311300China

Using scanner data on the consumption of packaged liquid beverages by Chinese urban households,we estimated the price elasticity of various beverages and compared the effects of volume-based versus sugar-content-based taxation strategies on consumer *** to the volume-based tax,the sugar-content-based beverage tax was predicted to cost less in compensating variation under the same amount of sugar reduced,indicating that taxation based on sugar content may be more efficient in preserving consumer *** comparison across different socioeconomic groups reveals that,given current beverage consumption status in China,the efficiency advantage of the sugar-content-based taxation strategy is more pronounced than that of the volume-based *** conclusions can provide insights for the food industry and the government to reduce the sugar content in beverages.

关键词： sugar-sweetened beverages consumption tax welfare effect QUAIDS

Entangled multi-knot lattice model of anyon current

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Chinese Physics B 2019年第4期28卷 76-107页

作者： Tieyan si Physics Department School of Sciences Key Laboratory of Microsystems and Microstructures Manufacturing-Ministry of EducationHarbin Institute of Technology

We proposed an entangled multi-knot lattice model to explore the exotic statistics of anyons. Long-range coupling interaction is a fundamental character of this knot lattice model. The short-range coupling models, such as the Ising model,Hamiltonian model of quantum Hall effect, fermion pairing model, Kitaev honeycomb lattice model, and so on, are the short-range coupling cases of this knot lattice model. The long-range coupling knot lattice model bears Abelian and nonAbelian anyons, and shows integral and fractional filling states like the quantum Hall system. The fusion rules of anyons are explicitly demonstrated by braiding crossing states. The eigenstates of quantum models can be represented by a multilayer link lattice pattern whose topology is characterized by the linking number. This topological linking number offers a new quantity to explain and predict physical phenomena in conventional quantum models. For example, a convection flow loop is introduced into the well-known Bardeen–Cooper–Schrieffer fermion pairing model to form a vortex dimer state that offers an explanation of the pseudogap state of unconventional superconductors, and predicts a fractionally filled vortex dimer state. The integrally and fractionally quantized Hall conductance in the conventional quantum Hall system has an exact correspondence with the linking number in this multi-knot lattice model. The real-space knot pattern in the topological insulator model has an equivalent correspondence with the Lissajous knot in momentum space. The quantum phase transition between different quantum states of the quantum spin model is also directly quantified by the change of topological linking number, which revealed the topological character of phase transition. Circularized photons in an optical fiber network are a promising physical implementation of this multi-knot lattice, and provide a different path to topological quantum computation.

关键词： anyon knot lattice linking number quantum Hall effect

Switching,explosion,and chaos of multi-wavelength soliton states in ultrafast fiber lasers

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Science China(Physics,Mechanics & Astronomy) 2024年第7期67卷 82-90页

作者： Zhi-Zeng si Yue-Yue wang Chao-Qing Dai College of Optical Mechanical and Electrical EngineeringZhejiang A&F UniversityLin’an 311300China

Because of the complexity and difficulty of realizing a multi-wavelength soliton state,reports on its internal dynamic characteristics are *** this study,the switching and periodic soliton explosion processes of the multi-wavelength soliton state in a negative dispersion passively mode-locked fiber laser are *** generation of the multi-wavelength soliton state undergoes the process of noise,oscillation,and stable mode-locking,and the splitting and annihilation of solitons with different group velocities directly impact the generation and disappearance of three *** and negative dispersion lead to different group velocities of *** presence and displacement of solitons with different group velocities cause soliton collisions,which lead to soliton explosions.A soliton experiences relative phase oscillation,chaos,and oscillation,as well as convergence and separation before and after an *** an increase in parameters related to pump power,single-soliton oscillation,multi-wavelength solitons,and chaos are found in experiments and simulations,proving the relevance and reliability between simulation and experimental *** work promotes the dynamical study of multi-soliton collisions in nonlinear science and the development of chaos theory in multi-comb lasers.

关键词： multi-wavelength fiber laser soliton explosion chaos state switching real-time dynamics

Effect of the partial substitution of Mg by Al on the crystal structure and hydrogenation behavior of La_2Mg_(17)

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Rare Metals 2007年第4期26卷 347-351页

作者： ZHANG Qing＇ an wang Changchun si Tingzhi School of Materials Science and Engineering Anhui University of Technology Maanshan 243002 China

The effect of the partial substitution of Mg by A1 on the crystal structure of La2Mg17 has been investigated. It was found that the LaEMgl7 phase disappears after the partial substitution of Mg by Al. The LaE（***0.1）17 alloy contains La（Mg,AI）12 and La（Mg,Al）2. Further increasing the Al content, the La2（Mg0.8Al0.2）17 alloy consists of La（Mg,Al）12, La（Mg,Al）2, and Mg. The La（Mg0.93Al0.07）12 phase in the La2（Mg0.9Al0.1）17 alloy crystallizes with the ThMn12-type structure in space group 14/mmm （No. 139）. The lattice parameters were determined to be a = 1.03246（7） nm and c = 0.59410（6） nm. In the ThMn12-type structure, AI atoms occupy 8f site but the A1 content is limited. Moreover, the hydrogenation character- istics have also been compared. La2Mgl7 decomposes into LaH3 and MgH2 under hydrogen, but the La（Mgo.93Alo.o7）12 phase can be hydrogenated into LaH3, MgH2, and La3Al11 at 473 K.

关键词： intermetallic compound crystal structure hydrogenation characteristic X-ray diffraction

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International Journal of Minerals,Metallurgy and Materials 2009年第2期16卷 135-142页

作者： Zhuo-ying Tan si-jing wang Mei-feng Cai State Key Laboratory of High-Efficient Mining and Safety of Metal Mines Ministry of Education of China Beijing 100083 China School of Civil and Environmental Engineering University of Science and Technology Beijing Beijing 100083 China Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China School of Civil Engineering Tsinghua University Beijing 100084 China

An instrumented drilling system can be applied for the acquisition of drilling process parameters. The system can provide continuous and huge data for geotechnical engineering. However, due to the complexity of ground strata, the variation in the drilling parameters with stratigraphical characteristics is great and the correlation between likely comparable parameters is not high, which limits the use of conventional correlation approaches in this field. How to use the data for engineering and how to get a reasonable interpretation for the relationships among the drilling parameters, as well as between a drilling parameter and formational characteristics, become a technical choke point for the development and application of the instrumented drilling system. Based on similarity criteria, the extraction of sample data and characteristics, the pretreatment of data and feature matching algorithms have been analyzed and an approach of slope coefficient searching identification has been established. A case study was carried out for the similarity between the rotational speed of the drill bit, flushing pressure, and effective thrust force graphics in general weathered granite. The result shows that the similarity coefficients between the rotational speed of the drill bit, flushing pressure, and effective thrust force are 0.72 and 0.83, respectively. Although there are differences between the distances of the graphics, the curves of both rotational speed and flushing pressure agree with the effective thrust curve in shape, which provides a possible method for the identification of various formations by use of the similarity between feature drilling parameters.

关键词： rock drilling process parameters similarity identification slope coefficient