We present measurements of a topological property, the Chern number (C1), closed manifold in space two-level system Hamiltonians, where is formed from superconducting qubit. manipulate parameters Hamiltonian qubit along paths and extract C1 nonadiabatic response By adjusting such that degeneracy passes inside to outside manifold, we observe transition C1=1→0. Our measurement quantized within 2% on either side transition.Received 28 April...

The instrumental role of government in the development social work C hina has led to questions about its political function. So far, little been reported on how “made” hina. To fill this gap, we first provide a brief chronological review major policies and activities hinese making state's intervention indeed massive crucial although, politically, it may limit mandate Yet, argue that profession is generating institutional space for emerging civil society take more active welfare service...

When applying the permanent magnetic synchronous motors (PMSM) to refrigerant system, suppression of speed ripples PMSM in low‐feed range becomes focus consideration. The authors start with generation mechanism and periodical characteristics propose an adaptive control method. In proposed method, place a frequency variable resonance controller parallel conditional proportion integral (PI) form PI‐resonance (PI‐RES) controller. compensation torque current generated by main reference PI...

Abstract The SiTian project, with its vast field of view, will become an ideal platform for asteroid scientific research. In this study, we develop a pipeline to analyze the photometry asteroids and derive their periods from data collected by pathfinder project Mini-SiTian (MST). is applied MST f02 region, test region sky area $2.29^{\circ} \times 1.53^{\circ}$. Rotation 22 are derived obtained light curves analysis. Among them, there 8 available in Asteroid Lightcurve Photometry Database...

Journal Article Social engineering of community building: Examination policy process and characteristics construction in China Get access Miu Chung Yan, Yan is an Assistant Professor, School Work Family Studies, University British Columbia. Address for correspondence: Columbia, Vancouver, Canada, V6T 1Z2. email: miu.yan@ubc.ca Search other works by this author on: Oxford Academic Google Scholar Jian Guo Gao Department Work, Shandong University, China. Community Development Journal, Volume...

Nurturing new, competent social work professionals requires multilevel preparation extending from school to the workplace. However, not much has been done understand this school-to-work transition process in countries where profession is still an early stage of development. This paper reports findings exploratory qualitative study 28 new workers China, emerging profession, on how they entered field and what challenges encountered. Their stories indicate that learned did form a foundation for...

This paper proposed a new type of permanent magnet synchronous motor (PMSM) called all-harmonic-torque PMSM (AHT-PMSM) to enhance the electromagnetic torque by using all harmonics magnetomotive force. The stator windings structure, drive converter configurations, and control model AHT-PMSM are illustrated. calculation process average (AET) ripple for also analyzed. It is demonstrated that theoretical AET improved 23% compared normal with sinusoidal (SIN-PMSM) supply. Finally, 24-slot/4-pole...

By mining electricity data characteristics and its relationship with environmental variables, this paper defines the month-season ratio (EMSR) based on trend extrapolation proposes a hybrid prediction method combining LSSVM EMSR. The actual consumption of A Province is used for case study. error three methods are compared which BP neural network, Elman network EMSR-LSSVM method. It shows that proposed algorithm can significantly improve accuracy.

The metastable β titanium alloys used in marine engineering applications suffered from stress-corrosion cracking seawater. different phase composition leads to the distinct behaviors of alloy. In this work, influence on a novel alloy Ti-6Mo-5V-3Al-2Fe-2Zr was investigated. with compositions were prepared by three types thermal-mechanical processing, i.e., single (assigned as M(β)), plus fine α M(β+fα)), and coarsened M(β+cα)). electrochemical tests constant-stress loading performed,...

Aiming at the issue of sliding mode observer (SMO) being sensitive to motor model parameters low speeds, a rotor position observation method based on resistance adaptive SMO and considering influence inverter dead time is designed in this paper. In method, online identification introduced into conventional SMO, are modified real-time, algorithm by using Lyapunov function. An enhanced linear compensation proposed improve eliminate voltage error between estimated actual models order address...

With the increasing geographic information system development, more technology about GIS was introduced to mineral industry. Because of promotion and implementation "Digital Mine", many mining companies research institutes started build large resources management system. Mineral data has complicated diversified characteristics, it include Two-Dimensional, Three-Dimensional spatial data, production statements, point information, sampling results etc. This paper introduces a kind design method...

Central Yunnan lead-zinc polymetallic province in Sichuan-Yunnan-Guizhou metallogenic has 50 large, medium and small acale of pb-zn deposits. Through contrast research, ore-bearing rock is developed from Kunyang group Early Proterozoic to Triassic carbonate, ore body, which characterized by low temperature salinity, obviously controlled faults, accompanied a strong dolomitization calciization. Possiblly, epoch Mesozonic. The ore-forming material mainly comes strata itself, lesser magmatic...

The Sichuan-Yunnan-Guizhou border region is one part of energy sources, and the regions with most abundant petroleum mineral resources. This paper presents ore characteristics, characteristics associations primary minerals gangues, concluding association between Lead-zinc element combination in occurrences Pb-Zn deposits, which summarize common Pb, Zn, Cu, Ag, Cd, Ge, As, Sb, Hg, Bi, Sn, Mn, Ba so on.

China's increasing demand for energy, the energy development and utilization patterns of traditional high exploitation, emission low use, not only caused a serious waste resources environmental damage, but also is difficult to meet needs economic facing industry crisis survival. Entered new period development, coal how get out resource conservation production intensive road sustainable becomes an important strategic task. In this paper, by constructing using efficiency optimal allocation...

We develop a Markov Chain Monte Carlo algorithm for estimating nested logit models in Bayesian framework. Appropriate "heating target" and reparametrization techniques are adopted fast mixing. For illustrative purposes, we have implemented the on two real-life examples involving 3-level structures. The first example involves Social Security's disability determination process (Soc. Security Bull. 58 (1995)). second one is taken from Amemiya Shimono's (Econ. Stud. Q. 40 (1989)) model of labor...

The safety performance of vehicles are divided into two types, one type is called" active safety", i.e. before the accident prevention, prevention measures.The other referred to as" passive when happened, and personnel take protection measures. People usually focuses on this idea seriously quite, people now pay more attention design. This paper introduces several kinds vehicle collision avoidance system ranging modes, discusses intelligent warning system.

The accuracy of water consumption prediction has a direct effect on the practicality optimal operation and control in distribution network system. In this paper, Support Vector Machine (SVM) was applied to conduct simulation training for hourly data (over period 11 months) which had been processed by fuzzy information granulation method, following month predicted. First, maximum extracted from previous months' consumption. Then every seven (a week) were transformed triangle particle. Three...

Three-dimensional models of deposit are the foundation realizing digital mineral , with aid mining software Surpac,it can establish database, three dimensional model surface,,orebody and roadway yunnan white cow factory silver polymetallic deposit.The 3D show vivid image topography geomorphology, ore body position, gallery situation. The orebody grade founding by kriging distribution change clearly, finally estimate amount body. Comparing traditional estimation method exploration report, we...