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Campus basketball culture is gradually affecting students’ sports spirit and sports accomplishment. Different from other cultures, basketball culture can effectively affect students’ moral sentiments. Therefore, teachers should use the power of basketball culture to instill positive basketball culture in daily basketball teaching, so as to influence students’ moral behavior imperceptibly and become sunny and positive! In particular, in this multimedia information age, “fast food” education has penetrated into the hearts of students. The education reform requires that the purpose of teaching is to stimulate students’ subjective initiative and objectively evaluate students. As for the evaluation of basketball teaching achievements, the method of specified items is generally used for testing, which is highly subjective. Teachers can not be absolutely fair and impartial when evaluating, and it is easy to cause negative emotional impact to some students. Therefore, it would produce resistance to basketball activities, even affect the quality of sports, and finally affect health. Based on the evaluation method of basketball teaching, this paper introduced a reliability intelligent evaluation model based on swarm intelligence and edge computing, and used this model to evaluate students’ performance in basketball teaching classes. Moreover, this paper designed a related experiment, the experimental results showed that boys and girls in basketball level gap was more obvious. As far as dribbling skills were concerned, the highest score of boy A was 91 points, while the lowest score of girl C was 54 points. The gap was quite large. For the three-step lay up, the highest B score of boys was 90 points, and the lowest D score of girls was 59 points. The gap was also large. It is necessary to explore the drawbacks of modern basketball teaching courses, so as to improve the quality of classroom teaching and create a diversified basketball teaching classroom. At the same time, the introduction results of the reliability intelligent evaluation model were studied by using the questionnaire survey method. The survey objects were 48 people, and the Clonebach coefficients A of the text questionnaire and the form questionnaire were 0.87 and 0.89 respectively. Through the change data of students’ interest and attitude, it was proved that the reliability intelligent evaluation model could improve the students’ enthusiasm for learning basketball courses, thus improving their sports quality. This study provided a reference value for the application of swarm intelligence and edge computing in the intelligent evaluation model of basketball teaching reliability, and provided a direction for the future development of basketball teaching.

Unconstrained conversational agents (UCAs) are powerful tools, allowing users to “talk” with machines/software programs to address their questions or needs. To use UCAs effectively and safely in health spaces, rigorous evaluations are essential but difficult to achieve. This review aimed to synthesize existing knowledge and outline a framework for evaluating UCAs in healthcare.

ObjectiveTo investigate the clinical features, diagnosis, treatment, and prognosis of autoimmune pancreatitis (AIP) alone versus AIP with IgG4 sclerosing cholangitis (IgG4-SC). MethodsA retrospective analysis was performed for the clinical data of 40 patients with type 1 AIP who were admitted to The First Affiliated Hospital of Zhengzhou University from June 2015 to January 2020, among whom 29 patients had AIP alone and 11 had AIP with IgG4-SC. The two groups were compared in terms of clinical manifestations, laboratory examination, imaging findings, treatment, and prognosis. The t-test was used for comparison of normally distributed continuous data between two groups, and the Mann-Whitney U test was used for comparison of non-normally distributed continuous data between two groups; the Fisher’s exact test was used for comparison of categorical data between two groups. The Kaplan-Meier method was used to calculate recurrence rate and plot recurrence curve, and the log-rank test was used for univariate analysis. ResultsCompared with the AIP group, the AIP+IgG4-SC group had significantly higher number of affected organs ［3.0(3.0-4.0) vs 3.0(1.5-3.5), Z=-2.172, P=0035］ and response index before treatment ［12.0(12.0-15.0) vs 12.0(9.0-13.5), Z=-2.157, P=0.032］. The AIP+IgG4-SC group had a significantly higher median serum IgG level than the AIP group ［21.0(15.8-23.7) g/L vs 14.8(13.3-15.7) g/L, Z=-2.711, P=0.004］. During the median follow-up time of 15.8 (6.5-31.3) months, the AIP+IgG4-SC group had a significantly higher recurrence rate than the AIP group (χ2=8.155, P=0.004). ConclusionPatients with AIP and IgG4-SC tend to have higher serum IgG4 level, number of affected organs, and recurrence rate than those with AIP alone. Early identification, diagnosis, and treatment can reduce the recurrence rate of AIP.

A focused jet is generated from a concave free surface through an impact of a tube. Experimental and numerical studies were conducted to explore the viscous influences. The results show that a strong vorticity sheet is generated along the free surface just after impact, and the liquid bulk is initialized ($t\le$$10^{-4}$s). After the impact, the liquid surface evolves freely and a jet is ejected ($t\gg$$10^{-4}$s). Pronounced tangential flow is found, and the material in the jet mainly originates from the viscous penetrating layer below the free surface. According to the above observations, a vorticity mechanism of the free surface evolution is proposed. Further, by combining the viscous and interfacial tension effects, a scaling relation estimating the jetting velocity is derived, which agrees with the numerical and experimental results well. The work will be valuable for viscous droplets preparation., Comment: 13 pages, 7 figures

In 1687, Sir Issac Newton published The Mathematical Principles of Natural Philosophy in which the law of universal gravitation was derived. It is the first inverse-square law discovered in nature, combined with Coulomb's law in 1785, the two famous inverse-square laws become part of the foundation of physics. Why does nature prefer inverse-square laws over the laws of other forms? The question is still arousing broad discussion, and it is an important topic in physics. So far, the origin of inverse-square law is still under exploration although from the point of reductionism, the law of universal gravitation can be treated as the approximation of Einstein's general relativity under weak gravitation, and Coulomb's law could be derived from quantum electrodynamics. Here we discover a new inverse-square law between evaporating droplets deposited on a high energy solid substrate. For binary droplets, we show that the evaporation from a source droplet will create a surface tension gradient in the precursor film of a target droplet, resulting in a long-range inverse-square law force acting on the target droplet, and that the inverse proportion decay of the source vapor concentration in the space essentially contributes to the inverse-square form of the force. Furthermore, the inverse-square law force here is shown to hold for all experimental parameters tested, and other systems such as pure-liquid-droplet system and thermocapillary system, and it satisfies the superposition principle, not only suggesting exciting directions for future droplet research and applications, but also benefiting understanding of nature's predilection for inverse-square law.

Background/Aims: Myeloid-derived suppressor cells (MDSCs) are increased in inflammatory and autoimmune disorders. This study aims to evaluate the significance of MDSCs in dilated cardiomyopathy (DCM) patients. Methods: In total, 42 newly hospitalized DCM patients and 39 healthy controls were enrolled in the study. The frequencies of circulating CD14+HLA-DR-/low MDSCs were determined by flow cytometry. Then, the functional properties of MDSCs in suppressing T cell proliferation and interferon-gamma (IFN-γ) production were measured in a co-culture model. Then, mRNA expression levels of various important molecules in peripheral blood mononuclear cells were measured by real time polymerase chain reaction. Furthermore, correlation analyses between MDSC frequencies and cardiac function parameters were also performed. Results: The frequencies of circulating CD14+HLA-DR-/low MDSCs were significantly elevated in DCM patients compared with healthy controls. It showed that MDSCs from DCM patients more effectively suppressed T cell proliferation and IFN-γ production compared with those from healthy controls, which was partially mediated by arginase-1 (Arg-1). In addition, the correlation analysis suggested that MDSC frequencies were negatively correlated with left ventricular ejection fraction (LVEF), while positively with N-terminal pro-brain natriuretic peptide (NT-proBNP) in patients with DCM. Conclusions: Circulating activated MDSCs might play significant immunomodulatory roles in the pathogenesis of DCM.

Driving environment perception is a critical and fundamental task of Advanced Driver Assistance System (ADAS) and self-driving technology. In object detection, one of the major challenges is how to achieve an effective model from real scene. Although A medium-level representation named stixel-world has achieve accurate detection results for the task of generic obstacle detection, robustness is still a problem and hard for application. To address this issue, this paper proposes a variant of approach named V-stixel that need no free space computation. Compared with the detection method of monocular image, a variety of obstacle types can be detected without the specific object modeling. It is a generic obstacle detection method and needs no previous training step. Finally, we compare this new method with baseline methods on the KITTI stereo dataset. The experimental results show that the accuracy of the detection results is good, the measurement error is robust in the long video sequences and gain a significant speed-wise.

Regulatory T cells (Tregs) play a pivotal role in the pathological development of hypertension. Helios, a transcription factor from the Ikaros family, was recently reported to be a bona fide marker for natural Tregs or activated Tregs with suppression function, however, little has been known about its role in hypertension. This study was aimed to find whether Helios+ Tregs really play a vital role in hypertension. A total of 60 hypertension patients, and 46 normotension subjects were enrolled in this study. Frequencies of different Tregs subsets in peripheral blood were measured by flow cytometry. Plasma cytokine level was determined by ELISA. The mRNA expression of Foxp3 and Helios in purified CD4+ T cells was detected by RT-PCR. Proportion of CD4+Foxp3+Helios+ Tregs was decreased significantly in patients with hypertension (62.52%±1.18% vs. 71.89%±1.03%, P

Traction therapy is a common method for bone disease treatment and recovery. Aiming at the shortage of bulky size and low precision of the existing traction bed, a new kind of small, safe and stable traction device and its control system are designed in this paper. The device adopts separated driving mechanism, which drives rope-winding wheel to rotate to create traction force, which detected by tension sensor based on swing arm mechanism and a spring, through gear set composed of planetary gear train and a small gear. ATmega128 is chosen as the main processor to realize closed-loop control to promote the precision of traction force. Human-machine interaction (HMI) is based on an 8-inch serial ports touch screen, supplying friendly and simple control. Theoretical analysis and experimental verification show that the precision of traction force has been greatly improved on the traction device, only ±1% error in 0~60kg and ±2% error in 60~90kg.

Due to various factors, the global scope disaster events occur inevitably every year. Terrorism, natural disasters or destructive earthquakes tend to cause a large number of people buried in the ruins of build- ings. The research of search and rescue instruments research is mainly focused on snake-like robot and life de- tector both at home and abroad. The endoscopic search and rescue robot in this paper combines the characteris- tics of these two kinds of search and rescue equipment. This thesis mainly studies the insertion mechanism of endoscopic flexible search and rescue robot. Based on the mechanics characteristics of the flexible robot body, this paper analyzes several common failure modes during the insertion into the ruins. This article puts forward the scheme of segmented gradual pulling-pushing, which plays an important role in promoting search and rescue work.

Distributed photovoltaic (PV) grid failure occurs, the short circuit fault current is small, and the power flow is bidirectional, the traditional power grid relay protection method is no longer applicable. In this article, through the study of traditional active frequency drift islanding detection method (AFD), analyses its advantages and disadvantages and applicable occasions, a new type of composite island detection method is proposed, the method based on adaptive islanding detection method accelerated frequency shift (AAFD), by introducing the common coupling point voltage frequency in a direction of continuous change number n, piecewise adaptively adjust frequency positive feedback coefficient, accelerate the limit of the frequency deviation, if the number of change if more than a dozen times, are not the limit of the frequency, the constant 2 cycle of negative pulse current amplitude power frequency interference, trigger under-voltage protection, so as to detect the island.this method can reduce the grid harmonic distortion rate, improve the response time of the island detection. At last, through Matlab simulation to verify.

Using first-principles density functional calculations, electronic and optical properties of ferromagnetic semiconductor EuO are investigated. In particular, we have developed a way to obtain the spin-dependent optical response of the magnetic materials, which is helpful to verify the spin-dependent band structure of EuO. Significantly different optical responses from spin-up and spin-down channels are obtained in both linear and nonlinear cases, making it possible to distinguish contributions from different spin-channels in the optical absorption spectra if spin-flip process can be neglected. In addition, the red-shift of the absorption edge from paramagnetic to ferromagnetic ordering is explained by exchange interactions. Using such method, we have also compared the optical properties of multiferroic EuO which is induced by strong epitaxial strain. Our results show that from tensile to compressive strain, the blue-shift of the leading absorption peaks in the optical spectra, the red-shift of the optical band gap in spin-up state can be observed, consistent to the energy difference between spin-splitting orbits. The spin-dependent nonlinear optical properties reveal that in the infrared and visible light region, the contributions to second-harmonic generation (SHG) susceptibilities are mainly from spin-majority channels. In addition, the strain effect is also discussed. With the increase of epitaxial strain, the larger energy shift of the leading absorption peaks, and the more remarkable nonlinear optical response can be obtained., 8 pages, 6 figures

The nature of the stereochemically active lone pair has long been in debate. Here, by application of our recently developed orbital selective external potential (OSEP) method, we have studied the microscopic mechanism of stereochemically active lone pairs in various compounds. The OSEP method allows us to shift the energy level of specific atomic orbital, therefore is helpful to identify unambiguously the role of this orbital to the chemical and physical properties of the system we are interested in. Our numerical results, with compelling proofs, demonstrate that the on-site mixing of cation valence s orbital with the nominally empty p orbitals of the same subshell is crucial to the formation of lone pair, whereas the anion p orbital has only small effect. Our detailed investigation of Sn and Pb monochalcogenides show that structures of these systems have significant effects on lone pairs. In return, the formation of lone pair, which can be controlled by our OSEP method, could result in structural instabilities of Sn and Pb monochalcogenides.

We discuss the electronic structure, lattice dynamics and electron-phonon interaction of newly discovered superconductor LaO$_{0.5}$F$_{0.5}$BiS$_{2}$ using density functional based calculations. A strong Fermi surface nesting at $\mathbf{k}$=($\pi $,$\pi $,0) suggests a proximity to charge density wave instability and leads to imaginary harmonic phonons at this $\mathbf{k}$ point associated with in-plane displacements of S atoms. Total energy analysis resolves only a shallow double-well potential well preventing the appearance of static long-range order. Both harmonic and anharmonic contributions to electron-phonon coupling are evaluated and give a total coupling constant $\lambda \simeq 0.85$ prompting this material to be a conventional superconductor contrary to structurally similar FeAs materials., Comment: Supplementary Materials is added

Multiferroics, where two or more ferroic order parameters coexist, is one of the hottest fields in condensed matter physics and materials science[1-9]. However, the coexistence of magnetism and conventional ferroelectricity is physically unfavoured[10]. Recently several remedies have been proposed, e.g., improper ferroelectricity induced by specific magnetic[6] or charge orders[2]. Guiding by these theories, currently most research is focused on frustrated magnets, which usually have complicated magnetic structure and low magnetic ordering temperature, consequently far from the practical application. Simple collinear magnets, which can have high magnetic transition temperature, have never been considered seriously as the candidates for multiferroics. Here, we argue that actually simple interatomic magnetic exchange interaction already contains a driving force for ferroelectricity, thus providing a new microscopic mechanism for the coexistence and strong coupling between ferroelectricity and magnetism. We demonstrate this mechanism by showing that even the simplest antiferromagnetic (AFM) insulator MnO, can display a magnetically induced ferroelectricity under a biaxial strain.

Colloque avec actes et comité de lecture. Internationale.; International audience; We investigate here shear flow past a droplet adhering on a wall. Results were obtained for the 3D problem with inertia by using a diffuse-interface method. First, conditions are considered wherein droplets, after an initial transient, attain a steady state shape, due to contact angle hysteresis. Results are presented for drop shapes, and the shape of the contact lines, at the critical conditions beyond which no steady shape is found. Results are also presented for the critical conditions for the onset of droplet motion as a function of a Reynolds number. The results compare well with those reported in previous work for creeping flows in that asymptotic limit. The final part of the presentation focuses on the complex structure of the wake behind the droplets, and results will be shown wherein droplets either break up, detach, or continue to move along the wall.

Using the first-principles method based on density functional theory, we investigate the structural properties of seven different phases of BiFeO 3 including R 3 c , R 3 m , P 4 mm , Cm , Pm 3 m , R 3 m and R 3 c and structural transition. The results show that the ground state has the R 3 c phase, and that phase transitions can occur among these phases, which may be characterized by two types of structural transitions. One is the relative displacement between octahedral FeO 6 and Bi 3+ , and the other is the rotation of octahedral FeO 6 along the [111] axis. Furthermore, the BiFeO 3 film is found to be able to change from R 3 c phase to P 4 mm phase, owing to the substrate effect.