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信息化时代基于微课的翻转课堂在研究生英语教学中的应用研究

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科教文汇 2025年第1期 124-128页

作者：胡奇军江西中医药大学人文学院

研究生教育对学生的英语能力要求较高，传统的学习方式难以满足学生的学习需求，互联网的普及和信息技术的发展为研究生英语教学改革指明了新的方向。基于微课的翻转课堂深度学习模式实现了以信息化带动教育现代化，引导学生主动探索学... 详细信息

研究生教育对学生的英语能力要求较高，传统的学习方式难以满足学生的学习需求，互联网的普及和信息技术的发展为研究生英语教学改革指明了新的方向。基于微课的翻转课堂深度学习模式实现了以信息化带动教育现代化，引导学生主动探索学习中的问题，让学生更多地参与深入思考，提高研究生的自主学习能力和英语综合应用能力，提升研究生教育的整体质量。

关键词：信息技术研究生英语翻转课堂微课应用研究

ON THE ZEROS OF QUOTIENTS OF BESSEL FUNCTIONS

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Chinese Annals of Mathematics,Series B 2000年第3期21卷 285-296页

作者： A.FRIEDMAN B.hu j.j.L.VELAZQUEZ DepartmentofMathematics UniversityofMinnesotaMinneapolisMN55455USA. DepartmentofMathematics UniversityofNotreDameNotreDameIN46556USA. DepartamentodeMatematicaAplicada FacultaddeMatematicasUniversidadComplutense28040MadridSpain.

The paper studies the zeros of 2mIm/Im-1- (m+1)I1 /I0, where Im are the Bessel functions.

关键词： Zeros Quotient Bessel function

极早或超早产儿应用氢化可的松治疗的临床研究进展

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中华儿科杂志 2025年第1期63卷 92-95页

作者：胡廷岳刘慧强童笑梅北京大学第三医院儿科北京

随着医疗技术的不断进步, 小出生胎龄极限早产儿救治成功率逐年提高, 极早或超早产儿氢化可的松的临床应用呈增多趋势。本文综述氢化可的松在极早或超早产儿中的使用时机、剂量及其与地塞米松的对比, 探讨其对极早或超早产儿临床结局的...

随着医疗技术的不断进步, 小出生胎龄极限早产儿救治成功率逐年提高, 极早或超早产儿氢化可的松的临床应用呈增多趋势。本文综述氢化可的松在极早或超早产儿中的使用时机、剂量及其与地塞米松的对比, 探讨其对极早或超早产儿临床结局的影响。临床应用氢化可的松需权衡利弊风险, 慎重选择使用时机和剂量。

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小煤柱沿空掘进瓦斯综合防治技术研究

煤炭技术 2025年第1期44卷 198-201页

作者：胡乐天山西保利平山煤业股份有限公司山西沁水048200

以某矿31018回风顺槽小煤柱沿空掘进为工程背景,对采空区侧煤体卸压范围考察,确定采空区侧煤体卸压范围,并在卸压范围进行残余瓦斯含量测试,划定无突出危险性范围;采用对小煤柱进行注浆加固和巷道全断面喷浆措施防止采空区瓦斯溢出;使... 详细信息

以某矿31018回风顺槽小煤柱沿空掘进为工程背景,对采空区侧煤体卸压范围考察,确定采空区侧煤体卸压范围,并在卸压范围进行残余瓦斯含量测试,划定无突出危险性范围;采用对小煤柱进行注浆加固和巷道全断面喷浆措施防止采空区瓦斯溢出;使用钻屑指标法对掘进工作面进行预测和验证。统计表明:31018回风顺槽小煤柱沿空掘巷过程中,预测指标K_(1max)=0.24,S_(max)=3.4,平均进尺5.8 m/d,回风流平均瓦斯浓度为0.15%,单日绝对瓦斯涌出量平均为1.04 m^(3)/min,实现了巷道安全掘进。

关键词：沿空掘进瓦斯治理小煤柱卸压范围注浆加固

Predicting the strut forces of the steel supporting structure of deep excavation considering various factors by machine learning methods

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Underground Space 2024年第5期18卷 114-129页

作者： Haibo hu Xunjian hu Xiaonan Gong Research Center of Coastal and Urban Geotechnical Engineering Zhejiang UniversityHangzhou 310058China

The application of steel strut force servo systems in deep excavation engineering is not widespread,and there is a notable scarcity of in-situ measured *** presents a significant research gap in the *** this,our study introduces a valuable dataset and application scenarios,serving as a reference point for future *** main objective of this study is to use machine learning(ML)methods for accurately predicting strut forces in steel supporting structures,a crucial aspect for the safety and stability of deep excavation *** employed five different ML methods:radial basis function neural network(RBFNN),back propagation neural network(BPNN),K-Nearest Neighbor(KNN),support vector machine(SVM),and random forest(RF),utilizing a dataset of 2208 measured *** points included one output parameter(strut forces)and seven input parameters(vertical position of strut,plane position of strut,time,temperature,unit weight,cohesion,and internal frictional angle).The effectiveness of these methods was assessed using root mean square error(RMSE),correlation coefficient(R),and mean absolute error(MAE).Our findings indicate that the BPNN method outperforms others,with RMSE,R,and MAE values of 72.1 kN,0.9931,and 57.4 kN,respectively,on the testing *** study underscores the potential of ML methods in precisely predicting strut forces in deep excavation engineering,contributing to enhanced safety measures and project planning.

关键词： Deep excavation Steel supporting structure Strut forces Machine learning Time Temperature

The role of host refuge and strong Allee effects in a host-parasitoid system

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International journal of Biomathematics 2023年第5期16卷 111-135页

作者： Xiaochuan hu Sophia R.-j.jang Vinli Inc. DallasTX75206USA Department of Mathematics and Statistics Teras Tech University LubbockTX 79409USA

We propose and study a discrete host-parasitoid model of difference equations with a spatial host refuge where hosts in the refuge patch are free from parasitism but undergo a demographic strong Allee *** the growth rate of hosts in the non-refuge patch is less than one,a host Allee threshold is derived below which both populations become *** is proven that both populations can persist indefinitely if the host growth rate in the non-refuge patch exceeds one and the maximum reproductive number of parasitoids is greater than *** simulations reveal that the host refuge can either stabilize or destabilize the host-parasitoid interactions,depending on other model parameters.A large number of parasitoid turnover from a parasitized host may be detrimental to the parasitoids due to Allee effects in the hosts within the refuge ***,it is demonstrated numerically that if the host growth rate is not small,the population level of parasitoids may suddenly drop to a small value as some parameters are varied.

关键词： Host refuge strong Allee effect stabilizing and destabilizing Beverton-Holt growth rate Allee threshold maximum reproductive number

Interferometers Utilizing Reversible X-ray-induced Chemical Changes in Poly(N-isopropylacrylamide)Microgels

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Chinese journal of Polymer Science 2024年第12期42卷 1915-1924,I0008页

作者： ya-jie Wang Ping Zhang Michael j Serpe Hong Chen Liang hu State Key Laboratory of Radiation Medicine and Protection Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutionsand School for Radiological and Interdisciplinary Sciences(RAD-X)Soochow UniversitySuzhou 215123China State and Local joint Engineering Laboratory for Novel Functional Polymeric Materials College of ChemistryChemical Engineering and Materials ScienceSoochowUniversitySuzhou 215123China Department of Chemistry University of AlbertaEdmontonABT6G 2G2Canada

Photonic materials,which react to light,have garnered interest due to their capability to exhibit adjustable structural ***,light targets the UV,visible,or near-IR *** this study,microgel-based photonic materials that are capable of reversibly responding to Xrays have been *** accomplish this,azobenzene(Azo)-containing poly(N-isopropylacrylamide)(pNiPAm)-based microgels are ***,ZnS scintillator and Cr/Au are applied on each side of the poly(methyl methacrylate(PMMA)***,the Azo MG monolayer is deposited onto the Au surface,followed by the deposition of an additional layer of Cr/*** process generates ZnS/PMMA/Cr/Au/Azo MG/Cr/Au or ZnS/Au-Azo MG-Au *** as a typical interferometer,ZnS/Au-Azo MG-Au demonstrates tunable colors based on the separation distance between the two Au *** ZnS scintillator can absorb and convert X-rays into Uv light,initiating the transition of the Azo groups from a trans to a cis ***,this transition causes the Azo MG to *** Azo MG swells,the distance between the two Au layers increases,resulting in a red-shift of approximately 350 nm in the optical signal of the ZnS/Au-Azo MG-Au ***,this X-ray responsivity of the interferometer is reversible,as it returns to its initial state after being stored in the dark for 24 *** demonstrate its capabilities,the ZnS/Au-Azo MG-Au interferometer successfully releases a drug when triggered by X-ray stimulation,thus validating its *** microgel-based interferometers hold significant promise for applications in chemoradiotherapy,radiobiology,and actuators in space.

关键词： N-isopropylacrylamide Microgels Interferometers X-rays Scintillators

Crystallization Behaviour and Mechanical Properties of Zr_(65)Cu_(18)Ni_9Al_8 Bulk Metallic Glass

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journal of Materials Science & Technology 2007年第5期23卷 693-696页

作者： M.Iqbal j.I.Akhter Haifeng ZHANG Zhuangqi hu Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences 72 Wenhua Road Shenyang 110016 China Physics Division Pakistan Institute of Nuclear Science and Technology P.O. Nilore Islamabad Pakistan

Designing and synthesis of cost effective bulk metallic glasses （BMGs） has been of considerable interest during the last decade so that they can be made commercially viable. Among these, Zr-based BMGs have been reported extensively due to their attractive properties, An alloy having composition Zr65Cu18Ni9A18 was designed and synthesized using 2-3 N pure materials by Cu mould casting. The alloy was characterized by X- ray diffraction （XRD）, scanning electron microscopy （SEM）, energy dispersive X-ray spectroscopy （EDS） and high temperature differential scanning calorimetry （DSC）. Thermal parameters like supercooled liquid region △Tx, reduced glass transition temperature Trg, γ and δ parameters were evaluated. Mechanical properties like microhardness, nanohardness, elastic modulus and fracture strength were measured. The alloy showed wide supercooled liquid region of 129＋1 K with improved thermal stability. The alloy has considerable fracture strength along with fair amount of ductility.

关键词： Zr-based bulk amorphous alloys Mechanical properties Glass-forming ability Thermal parameters

A Polarization Programmable Antenna Array

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Engineering 2022年第9期16卷 100-114页

作者： Dingzhao Chen yanhui Liu Ming Li Pan Guo Zhuo Zeng jun hu y.jay Guo Institute of Electromagnetics and Acoustics Xiamen UniversityXiamen 361000China School of Electronic Science and Engineering University of Electronic Science and Technology of ChinaChengdu 611731China yangtze Delta Region Institute(Quzhou) University of Electronic Science and Technology of ChinaQuzhou 324000China Global Big Data Technologies Centre University of Technology Sydney(UTS)NSW 2007Australia

Reconfigurable antennas are becoming a major antenna technology for future wireless communications and sensing *** is known that,with a single linear polarization(LP)reconfigurable antenna element,a preferred polarization can be produced from a set of multiple polarization states,thus improving the quality of the communication *** paper presents a new concept of a polarization programmable reconfigurable antenna array that consists of a number of polarization reconfigurable antenna elements with a finite number of possible polarization *** employing a new optimization strategy and programming the polarization states of all the array elements,we demonstrate that it is possible to realize any desired LP in the vectorial array radiation pattern with accurate control of sidelobe and crosspolarization levels(XPLs),thereby achieving the desired polarization to perfectly match that of the required communications *** numerical and experimental results are provided to prove the concept,and they agree well with each other.

关键词： Antenna array Polarization reprogrammable antenna Reconfigurable antenna