video_fps_30_opti.avi

30 frames of optically reconstructed 3-D scenes are compressed into one video file of Visualization

video_fps_30_digi.avi

30 frames of computationally reconstructed 3-D scenes are compressed into one video files of Visualization 1

Supporting Information

The file contains four figures and 1 table to provide details of the experiments and support the discussion in the pape

adhesion force data

The adhesion force data obtained from AFM measurement

sj-docx-1-tcn-10.1177_10436596231198271 – Supplemental material for Acculturation Among Chinese Married Immigrant Women in South Korea: A Structural Equation Modeling Analysis

Supplemental material, sj-docx-1-tcn-10.1177_10436596231198271 for Acculturation Among Chinese Married Immigrant Women in South Korea: A Structural Equation Modeling Analysis by Xin Jin and Ja Yun Choi in Journal of Transcultural Nursing</p

High salinisation risks in a typical semi-arid river network in northern China

The objective of this study was to investigate the salinisation characteristics of a semi-arid river network in northern China and highlight the influencing factors and risks. The Ziya River Basin, a typical semi-arid river network located in the North China Plain, is studied herein. Overlying water, surface sediment and riparian soil samples were collected in July and December of 2014 in the Ziya River Basin. The results showed that the average concentrations of salt content in the overlying water and surface sediment of 10 rivers in the Ziya River Basin were 1105.64 and 2159.35 mg/L, respectively. High level of salinisation was found in most rivers not only in overlying water, but also in surface sediment. The impact of the salinisation of overlying water on riparian soil diminished with distance away from the shore and had no impact beyond 15 m from the shore. Heavy pollution can contribute greatly to the salinisation of the water column and can cause significant impacts on river sediment and riparian soil. Salinisation in the overlying water affects the sediment and riparian soil, and reveals that the high risk of salinisation in the Ziya River Basin has been underestimated.</p

DataSheet1_Pollutant Flux Estimation of the Lijiang River Based on an Improved Prediction-Correction Method.DOCX

Pollutant flux estimation and the analysis of flux variations are the basis for water quality assessment and water pollution control. At present, pollution flux estimation has certain shortcomings, such as a low frequency of water quality monitoring and inadequate calculation methods. To improve the rationality and reliability of river pollution flux estimation results, an improved prediction-correction pollution flux estimation method was developed by combining the LOADEST model and the Kalman filtering algorithm. By establishing the regression equation between pollutant flux and daily discharge, the predicted pollution flux procedure can be calculated using the LOADEST model. In a subsequent step, the pollutant flux is corrected based on the Kalman filtering algorithm. The improved method was applied to estimate the fluxes of chemical oxygen demand (COD), ammonia nitrogen (NH3-N), and total phosphorus (TP) at the Guilin Section of the Lijiang River from 2010 to 2019. The estimated fluxes were in good agreement with the measured ones, with relative deviation values for COD, NH3-N, and TP of 2.27, 3.20, and 1.39%, respectively. The improved method can reasonably estimate fluctuations in river pollution fluxes without requiring more data. The results in the present study provide powerful scientific basis for pollutant flux estimation under low-frequency water quality monitoring.</p

Vision-based trajectory tracking control of quadrotors using super twisting sliding mode control

A trajectory-tracking problem for a vision-based quadrotor control system is investigated in this paper. A super twisting sliding mode (STSM) controller is proposed for finite-time trajectory tracking control. With the help of the homogeneous technique, the closed-loop system is proved to be finite-time stable. In addition, due to the introduction of super twisting mechanism, the controller can restrain chattering effect of sliding mode control. On the other hand, a pose estimation through data fusion is proposed to localise the quadrotor. A Kalman filter (KF) is utilised to fuse the estimated pose from semi-direct monocular visual odometry (SVO) with data from inertial measurement unit (IMU). A number of simulations are carried out on MATLAB and physical engine simulator Gazebo. The results show that the proposed system controller has better performances in terms of robustness and anti-disturbance than the proportional–integral–derivative (PID) controller and the first order sliding mode controller.</p

Studies on Highly Stereoselective Addition−Elimination Reactions of 3-(Methoxycarbonyl)-1,2-allen-4-ols with MX. An Efficient Synthesis of 3-(Methoxycarbonyl)-2-halo-1,3(<i>Z</i>)-dienes

3-(Methoxycarbonyl)-2-halo-1,3(Z)-dienes were prepared highly stereoselectively via SN2‘-type addition−elimination reactions of 3-(methoxycarbonyl)-1,2-allen-4-ols with MX. These products may easily undergo Negishi or Sonogashira coupling reactions to yield a series of stereodefined polysubstituted (E)-1,3-dienes

Annuloselectivity in Reactions of Diacyl Dichlorides and Imines: Combined Experimental and Theoretical Studies

The annuloselectivity defined as the annulation selectivity between [2 + 2] and cascade annulations of diacyl dichlorides and imines in the presence of organic bases to afford bis-β-lactams and 2,3-dihydro-1,3-oxazin-4-ones has been studied extensively with a combination of experiments and density functional theory (DFT) calculations. The present results indicate that it is the preference of diacyl dichlorides in the formation of cyclic α-oxoketenes in the presence of organic bases that controls the annuloselectivity. The cascade annulations of hexanedioyl and heptanedioyl dichlorides undergo the chloride-assisted cyclization of the corresponding ω-chlorocarbonylalkylketenes as the rate-determining step in the presence of triethylamine, rather than the generation of bisketenes followed by dimerization, affording five- and six-membered cyclic α-oxoketenes followed by the [4 + 2] annulations with imines to furnish 2,3-dihydro-1,3-oxazin-4-ones. This is an energetically competitive pathway to the normal Staudinger cycloaddition. Further decreasing (pentanedioyl dichloride) or increasing the linker length (octanedioyl and nonanedioyl dichlorides) results in the enhanced energetic barriers for the cyclization, which is less competitive to the direct Staudinger cycloaddition to afford bis-<i>trans</i>-β-lactams as the sole products. The current results provide an insight into the annuloselective control in the reactions of diacyl dichlorides and imines