教育强国理念下艺术类高职公共英语教学的创新与实践

本文探讨了教育强国理念下艺术类高职公共英语课教学的创新与实践。通过分析教育强国理念以及教学问题,提出将立德树人融入英语教学,以学生为中心,结合艺术专业知识改革教学内容与方法。引入混合教学模式,构建多元化评价体系,全面提升教学质量。通过本研究,旨在为艺术类高职院校公共英语课教学改革提供有益参考。

Robust Disturbance Rejection Based Control with Extended-state Resonant Observer for Sway Reduction in Uncertain Tower-cranes

In this paper, the problem of load transportation and robust mitigation of payload oscillations in uncertain tower-cranes is addressed. This problem is tackled through a control scheme based on the philosophy of active-disturbance-rejection. Here, a general disturbance model built with two dominant components: polynomial and harmonic, is stated. Then, a disturbance observer is formulated through state-vector augmentation of the tower-crane model. Thus, better performance of estimations for system states and disturbances is achieved. The control law is then formulated to actively reject the disturbances but also to accommodate the closed-loop system dynamics even under system uncertainty. The proposed control schema is validated via experimentation using a small-scale tower-crane,and compared with other relevant active disturbance rejection control(ADRC)-based techniques. The experimental results show that the proposed control scheme is robust under parametric uncertainty of the system, and provides improved attenuation of payload oscillations even under system uncertainty.

Stress tensors and quantification of fracture patterns to analyze connectivity and potential fluid flow in a mesa landform of the Northern Andes

This work applies stress tensors inversions and quantification of fracture patterns along the Mesa de Los Santos, in the Eastern Cordillera of Colombia, to better understand the potential fluid flow. It thus contributes to the conceptual hydrogeological model. The area was subdivided into three blocks, separated by the NW Potreros and the Los Santos faults, having minor inner faults of different orientations. This separation facilitates the analysis of the fractures measured in the field, which in general show high dip angles and a conjugate geometry in the northern block, tension fractures(Mode I) in the central block, and a random distribution in the southwestern block. WinTensor treatment of slickensides yielded a maximum horizontal stress(SHmax) of 111o, which coincides with the WNW-ESE tensor observed from the conjugate and tension joints. We then used Frac Pa Q to generate interpolation maps of fracture intensity and density. The maps show the highest values in the central block and the lowest in the northern block,where the precipitation is higher, causing intensive rock weathering and homogenization of the fracture planes. Although the highest values of connectivity by line are found to the south of the mesa, we suggest the possibility of greater flow from the recharge zone(NE) along bedding planes and open NW-SE fractures.

Multiplex Rapid Test with Acceptable Diagnosis Performance as a Solution to Increase Diagnosis of Hepatitis B and C Viruses in Pregnant Women in an Area of High Prevalence of Both Hepatitis Viruses Associated with HIV

Background and Objective: HIV, hepatitis B virus (HBV) and hepatitis C virus (HCV) are very widespread in the world, however, less than 20% of the people affected are diagnosed and treated. This study aimed to determine the prevalence of HIV, HCV and HBV co-infections in pregnant women at Bangui Community University Hospital and the cost of screening. Methods: A cross-sectional study involving consenting pregnant women who came for antenatal care was performed. HIV, HCV antibodies and HBV antigens were detected using Exacto Triplex? HIV/HCV/HBsAg rapid test, cross-validated by ELISA tests. Sociodemographic and professional data, the modes of transmission and prevention of HIV and both hepatitis viruses were collected in a standard sheet and analyzed using the Epi-Info software version 7. Results: Pregnant women aged 15 to 24 were the most affected (45.3%);high school girls (46.0%), and pregnant women living in cohabitation (65.3%) were the most represented. Twenty-five (16.7%) worked in the formal sector, 12.7% were unemployed housewives and the remainder in the informal sector. The prevalence of HIV, HBV, and HCV viruses was 11.8%, 21.9% and 22.2%, respectively. The prevalence of co-infections was 8.6% for HIV-HBV, 10.2% for HIV-HCV, 14.7% for HBV-HCV and 6.5% for HIV-HBV-HCV. All positive results and 10% of negative results by the rapid test were confirmed by ELISA tests. The serology of the three viruses costs 39,000 FCFA (60 Euros) by ELISA compared to 10,000 FCFA (15.00 Euros) with Exacto Triplex? HIV/HCV/AgHBs (BioSynex, Strasbourg, France). Conclusion: The low level of education and awareness of hepatitis are barriers to development and indicate the importance of improving the literacy rate of women in the Central African Republic (CAR). Likewise, the high prevalence of the three viruses shows the need for the urgent establishment of a national program to combat viral hepatitis in the CAR.

轮轨振动与气动荷载耦合作用下轻质装配式明洞动力学特性

根据铁路隧道洞口地形特征,设计了一种轻质装配式明洞,采用有限元软件建立了列车轮轨振动与气动荷载耦合模型,分析了高速列车通过时明洞结构响应情况。结果表明:随着接长明洞长度的增加,明洞应力、动变形和振动加速度均减小;在接长明洞长度小于50 m时明洞应力、动变形、振动加速度降速较大。随着距轨面高度的增加,明洞结构的应力和动变形增大,距轨面高度大于6.5 m后应力和动变形的增速变大。列车交会位置对明洞应力和动变形有影响,对振动加速度影响不大。在轮轨振动与气动荷载耦合作用下,明洞应力、动变形及振动加速度均较小,结构处于安全状态。

Agriculture and Soil Management in the Context of Sustainable Development in the Sudano-Sahelian Zone of Cameroon

The Sudanian-Sahelian zone of the Far-North Cameroon faces an extreme climate challenge resulting in increased vulnerability to erosion, soil degradation, and the effects of climate change, impacting soil fertility and agricultural yields. The objective of this study was to analyze agricultural practices, challenges related to climate change and soil degradation, as well as the solutions adopted by farmers to address these issues. To achieve this, 600 farmers from the six departments of the region were interviewed. The results highlight the significant impact of climatic conditions on soil health, agricultural activities, and food security. Farmers identified various indicators of soil degradation, including agricultural yields, bioindicator plants, plant growth, soil fauna, and root density. The main causes of soil degradation are associated with practices such as deforestation, intensive agriculture, the use of chemical fertilizers and pesticides, overgrazing, and the effects of climate change. The impacts of this degradation are multiple, including soil fertility loss, reduced agricultural yields, deforestation, reduced biodiversity, income loss, water resource pollution, and food insecurity. In response to these challenges, farmers have adopted sustainable soil management practices, including crop rotation, intercropping, fallowing, the use of organic fertilizers, and the adoption of conservation agriculture. To effectively address these challenges, concerted collaboration between farmers, civil society organizations, and government authorities is imperative to develop sustainable and effective solutions against soil degradation in the region.

Thermodynamic analysis, synthesis, characterization, and evaluation of 1-ethyl-3-methylimidazolium chloride: Study of its effect on pretreated rice husk

This work is focused on the determination of the optimal reaction conditions to synthesize the ionic liquid 1-ethyl-3-methylimidazolium chloride([EMIM][Cl]) and assess its suitability for the pretreatment of rice husk. The modified UNIFAC(UNIversal quasi-chemical Functional-group Activity Coefficients)approach for ionic liquids is used to develop a thermodynamic model that describes the reactive system methylimidazole(MIM), chloroethane(C_(2)H_(5)Cl) and [EMIM][Cl]. The model allows to study the phase equilibria coexistence(vapor–liquid equilibria and solid–liquid equilibria) and yields the theoretically optimal conditions to synthesize the ionic liquid. The model predictions are validated with the available experimental and reported data. By implementing the developed model, a simple way to synthesize ionic liquid [EMIM][Cl] was found allowing to study its influence on the structure and morphology of pretreated rice husk. The lignocellulosic materials involved in this study are characterized by their composition, enzymatic digestibility, scanning electron microscopy, and crystallinity. Compared to untreated material, [EMIM][Cl]-pretreated rice husk produces cellulose that can be efficiently enzymatic hydrolyzed with high sugar yields. This work offers a suitable methodology to include the synthesis and thermodynamics of the solvent media within the design of low-cost ionic liquids for lignocellulosic biomass pretreatment.

Cux1^(+)proliferative basal cells promote epidermal hyperplasia in chronic dry skin disease identified by single-cell RNA transcriptomics

Pathological dry skin is a disturbing and intractable healthcare burden,characterized by epithelial hyperplasia and severe itch.Atopic dermatitis(AD)and psoriasis models with complications of dry skin have been studied using single-cell RNA sequencing(scRNA-seq).However,scRNA-seq analysis of the dry skin mouse model(acetone/ether/water(AEW)-treated model)is still lacking.Here,we used scRNA-seq and in situ hybridization to identify a novel proliferative basal cell(PBC)state that exclusively expresses transcription factor CUT-like homeobox 1(Cux1).Further in vitro study demonstrated that Cux1 is vital for keratinocyte proliferation by regulating a series of cyclin-dependent kinases(CDKs)and cyclins.Clinically,Cux1+PBCs were increased in patients with psoriasis,suggesting that Cux1+PBCs play an important part in epidermal hyperplasia.This study presents a systematic knowledge of the transcriptomic changes in a chronic dry skin mouse model,as well as a potential therapeutic target against dry skin-related dermatoses.

CGMS集成统计工具STATCAT的应用

通过对CGMS集成统计工具软件STATCAT的应用介绍及统计预测检验,表明统计工具STATCAT具有较好的统计功能和预测效果,该统计工具对CGMS在黑龙江省业务化的应用发展具有重要作用。

Design of multilayer hybrid sol-gel coatings with bifunctional barrier-bioactive response on the Elektron 21 magnesium alloy for biomedical applications

The present study aims to develop multilayer barrier-bioactive hybrid sol-gel coatings from a mixture of the silane precursors tetraethylorthosilicate(TEOS)and glycidoxypropyltriethoxysilane(GPTMS)deposited on the Elektron 21 magnesium alloy.The purpose of the inner layer(barrier coating)was to provide corrosion protection to the magnesium alloy,whereas the outer layer(bioactive coating)was doped with different Ca and Mg contents to produce a bioactive material.The coatings were characterised using scanning electron microscopy(SEM)and their corrosion behaviour was evaluated by anodic polarisation and electrochemical impedance spectroscopy after immersion in simulated body fluid(SBF)at 37±0.5°C.The experimental results showed that the multilayer coatings increased the corrosion resistance of the alloy up to three orders of magnitude during immersion in SBF solution.On the other hand,the presence of Ca and Mg in the bioactive coating promoted the growth of apatite-like phases.However,an increment of salt content favoured the formation of porous coatings,which allowed the access of the electrolyte to the substrate leading to their rapid deterioration.Despite the latter,this research endorses the premise that the TEOS-GPTMS hybrid system represents a promising alternative to produce bifunctional barrier-bioactive coatings.

Heterogeneous catalysis under flow for the 21st century fine chemical industry

Due to metal leaching and poor catalyst stability, the chemical industry's fine chemical and pharmaceutical sectors have been historically reluctant to use supported transition metal catalysts to manufacture fine chemicals and active pharmaceutical ingredients. With the advent of new generation supported metal catalysts and flow chemistry, we argue in this study, this situation is poised to quickly change. Alongside heterogenized metal nanoparticles, both single-site molecular and single-atom catalyst will become ubiquitous. This study offers a critical outlook taking into account both technical and economic aspects.

The importance of grain and cut-off size in shaping tree beta diversity along an elevational gradient in the northwest of Colombia

Background:Species turnover(β-diversity)along elevational gradients is one of the most important concepts in plant ecology.However,there is a lack of consensus about the main driving mechanisms of treeβ-diversity at local scales in very diverse ecosystems(e.g.,Andean mountains),as well as how the sampling effect can alterβ-diversity estimations.Recently,it has been hypothesized that patterns of change inβ-diversity at local scales along elevational gradients are driven by sampling effects stemming from differences in the size of the species pool rather than by underlying community assembly mechanisms.Thus,we aim to evaluate the relative extent to which sampling effects,such as species pool size,grain size,and tree size cut-off,determine species sorting,and thus,the variability ofβ-diversity at local scales along elevational gradients in the northwest of Colombia.Results:Using 151-ha permanent plots spread out along a 3000m elevational gradient,we used standardizedβ-deviation to assess the extent to which either sampling effects or the community assembly mechanisms determine the changes in species composition at local scales.Standardizedβ-deviation was measured as the difference between the observed and nullβ-diversity divided by the standard deviation of the nullβ-diversity.We found that the magnitude of change in localβ-deviation along the elevational gradient was significant and dependent on the employed spatial grain size and tree size cut-off.However,β-deviation increased with elevation in all sampling designs,which suggests that underlying community assembly mechanisms play a key role in shaping localβ-diversity along the elevational gradient.Conclusions:Our findings suggest that grain size enlargement and the inclusion of trees with small diameters will improve our ability to quantify the extent to which the community assembly mechanisms shape patterns ofβ-diversity along elevational gradients.Overall,we emphasize the scale-dependent nature of the assessment ofβ-diversity.Likewise,we call for the need of a new generation of enlarged forest inventory plots along gradients of elevation in tropical forests that include small individuals to improve our understanding about the likely response of diversity and function to global change.

中国反垄断并购审查中的经济分析

本文从经济学角度,对中国的反垄断并购审查进行梳理,着重从竞争分析和救济措施两个方面与国际主流反垄断执法原则进行比较。综观商务部所公布的予以干预的决定公告,商务部反垄断局的竞争分析框架与主流反垄断执法做法基本一致,注重竞争分析,但对于并购产生的效率尚缺乏明确的讨论。在救济措施方面,就目前公告的案件而言,商务部更多的采用了行为性救济,而且某些救济措施对企业的运营深度介入,这与其他国家竞争执法机构的做法有所不同。

Solubility and thermodynamics of lamotrigine in ternary mixtures of ionic liquids([OMIm][Br]+[HMIm][Br]+water)at different temperatures

Experimental mole fraction solubility of lamotrigine(LTG)in ternary aqueous mixtures of two ionic liquids(ILs),1-hexyl and 1-octyl-3-methylimidazolium bromide,[HMIm][Br]and[OMIm][Br]were reported at several temperatures T=(293.15 to 313.15)K.The van’t Hoff and(Jouyban-Acree-van’t Hoff,E-Jouyban-Acree-van’t Hoff,e-NRTL,UNIQUAC and Wilson)models were used to correlate the solubility data.The comparison of the models with temperature and solvent composition dependencies shows that the Wilson model has the minimum ARD which are relatively close to those obtained from Jouyban-Acree-van’t Hoff and E-Jouyban-Acree-van’t Hoff models and maximum ARD belonged to the UNIQUAC model.The order of ARDs for these models is:Wilson b Jouyban-Acree-van’t Hoff,E-Jouyban-Acree-van’t Hoff b e-NRTL b UNIQUAC.Moreover,the apparent thermodynamic functions,Gibbs free energy,enthalpy and entropy of dissolution and mixing were calculated based on the van’t Hoff and Gibbs free energy equations.The strong LTG-ILs interactions and enthalpic contribution of the dissolution process resulted from the calculated thermodynamic functions.

一种低冲击能炸药──ANRUB的发展

叙述了一种由粒状硝镀和橡胶组成的新型低冲击能炸药─—ANRUB。现有的低冲击能炸药是通过大幅度降低炸药密度和／或利用稀释刘来降低冲击能，因此减小了体积能量。本文讨论的方法通过放慢炸药反应速率来降低冲击能量，同时保持与ANFO相近的总能量。本文讨论了ANRUB的发展，包括最初的水下试验到大规模的现场试用。在每一试验阶段同时测量ANRUB和ANFO，以确定冲击能的降低和随之而来的鼓胀能增加。测定参数包括水市冲击能、鼓胀能、爆速（VOD）、振动强度和鼓胀速度。ANRUB具有改进最终边界和生产爆破的潜力。低的冲击能特征对最终边界爆破来说是所希望的，而高的鼓胀分量很适于生产爆破。

澳大利亚昆士兰州西北世纪锌铅银矿床的地球物理特征

世纪锌铅银矿床由ＣＲＡ 公司于１９９０ 年发现，并进行勘探。钻探圈定出锌（１０ ．３ ％ ） 、铅（１ ．５ ％ ） 、银（３５ ×１０ － ６） 的矿石量达１１ ６００ 万ｔ。矿床被发现以来，物探技术就应用于帮助确定矿化范围，不同岩性边界和构造的圈定，提供矿石储量的计算和采矿计划的资料以及该区下一步勘探工作帮助。使用的物探方法有重力、地面和航空磁法、地面和航空电磁、ＩＰ／ 电阻率法、钻孔物探测井及地震反射。最为有效的方法是ＩＰ／ 电阻率法。它可以帮助确定在深度至少为１５０ ｍ

国际体育纠纷的种类、国际体育仲裁的特殊性和必要性及解决途径

生活中必有冲突,如何解决这些冲突是问题的关键所在。体育纠纷具有特殊性,通过体育共同体以外的方法来解决体育纠纷,可能出现矛盾的裁决、不公平以及法律的不确定性,这些都影响到裁决的有效性、效力和案件裁决的执行。国际体育仲裁院正是基于此背景下建立的,它独立于任何体育组织或地方政府的独立机构。它通过那些适用于体育领域特殊需要的程序规则以仲裁和调解的方式来解决与体育相关的纠纷,也逐渐成为最公正、最有效、最快速、最具成本效益的体育纠纷解决模式。

Modeling height growth for teak plantations in Colombia using the reducible stochastic differential equation approach

Teak(Tectona grandis L.f.)plantations are increasingly being established in tropical regions to meet a rising demand for its highly valued timber.Teak plantations have been established in the Atlantic Coastal Plain region of Colombia,a region climatically suitable for teak growth by having a monsoon climate with a unimodal precipitation pattern.Tree diameter at breast height(DBH,1.3 m above ground)and mean top height,periodically measured over a 17-year period in 44 permanent sampling plots of size 0.06 and 0.10 ha,were used in this study.A stochastic differential equation(SDE),along with a Bertalanffy–Richards-type height growth model,was used to model and estimate top height growth of teak plantations in Colombia.Environmental noise and height measurement errors were explicitly considered as the main uncertainty sources of mean top height growth.The best model for estimating mean top height,based on statistical performance and biological rationale,had the asymptote defined as a local parameter and the growth rate and shape specified as global parameters.This model outperformed its counterpart that had the growth rate specified as a local parameter and asymptote and shape as global parameters.The selected model also outperformed alternative approaches such as the mixed-effects model,generalized algebraic difference approach,and the dummy variable method.Estimated trajectories for the mean top height of teak in Colombia are biologically sound based on the measured height series and previous studies in Latin America.Results suggest that most of the uncertainty associated with the mean top height growth of teak plantations in Colombia was largely explained by environmental noise.The best estimated model using the SDE approach can be useful for predicting height growth and evaluating site productivity of teak plantations in Colombia and in neighbouring countries with biophysical characteristics similar to those where teak has been planted in Colombia.

Polyphenol Composition, Antioxidant, Antimicrobial and Quorum Quenching Activity of the “Carciofo di Montoro” (<i>Cynara cardunculus</i>var. <i>scolymus</i>) Global Artichoke of the Campania Region, Southern Italy

Biochemical characteristics, antimicrobial and quorum quenching activity of the extract of the “Carciofo di Montoro”, a typical ecotype of Cynara cardunculus var. scolymus of the Campania region (Southern Italy) were studied, to consider it as potential reserve of bioactive constituents useful for food industry and beneficial for managing and preventing several chronic illnesses in humans. The extract exhibited a good polyphenol content (528 μg GAE/g) and antioxidant activity (EC50 less than 5 mg). Ultra pressure liquid chromatography (UPLC) revealed high amount of chlorogenic acid, cynarin and epicatechin. The extract showed antimicrobial activity against Escherichia coli, Staphylocccus aureus, Pseudomonas aeruginosa, Enterococcus faecalis and Bacillus cereus pathogen strains. Finally, quorum quenching activity was demonstrated. The variety Carciofo di Montoro could represent a good source of health-promoting polyphenols, encouraging a nutraceutical use of such ecotype, for several phyto-pharmaceutical applications.

从经济学角度看互联网产业中的竞争问题

互联网产业的主要特征表现为快速和频繁的创新,并且这种创新非常具有颠覆性,即出现所谓的熊彼特式竞争,新技术取代陈旧技术,新产品取代旧产品,新企业取代旧企业,如此颠覆循环,周而复始,而且该循环越来越快,越来越加剧。在这种情况下,任何企业想要保持领先地位都变得非常不易。在互联网产业中,普遍受到关心的问题是,谁会是下一个赢家？在位公司到底还能支持多久？