Continuous Emission Spectrum Measurement for Electron Temperature Determination in Low-Temperature Collisional Plasmas

Continuous emission spectrum measurement is applied for the inconvenient diagnos- tics of low-temperature collisional plasmas. According to the physical mechanism of continuous emission, a simplified model is presented to analyze the spectrum in low temperature plasma. The validity of this model is discussed in a wide range of discharge parameters, including electron tem- perature and ionization degree. Through the simplified model, the continuous emission spectrum in a collisional argon internal inductively coupled plasma is experimentally measured to determine the electron temperature distribution for different gas pressures and radio-frequency powers. The inverse Abel transform is also applied for a better spatially resoluted results. Meanwhile, the result of the continuous emission spectrum measurement is compared to that of the electrostatic double probes, which indicates the effectiveness of this method.

CROSS-TRACK THREE APERTURES MILLIMETER WAVE SAR SIDE-LOOKING THREE-DIMENSIONAL IMAGING

The airborne cross-track three apertures MilliMeter Wave (MMW) Synthetic Aperture Radar (SAR) side-looking three-Dimensional (3D) imaging is investigated in this paper. Three apertures are distributed along the cross-track direction, and three virtual phase centers will be obtained through one-input and three-output. These three virtual phase centers form a sparse array which can be used to obtain the cross-track resolution. Because the cross-track array is short, the cross-track resolution is low. When the system works in side-looking mode, the cross-track resolution and height resolution will be coupling, and the low cross-track resolution will partly be transformed into the height uncertainty. The beam pattern of the real aperture is used as a weight to improve the Peak to SideLobe Ratio (PSLR) and Integrated SideLobe Ratio (ISLR) of the cross-track sparse array. In order to suppress the high cross-track sidelobes, a weighting preprocessing method is proposed. The 3D images of a point target and a simulation scene are achieved to verify the feasibility of the proposed method. And the imaging result of the real data obtained by the cross-track three-baseline MMW InSAR prototype is presented as a beneficial attempt.

Evaluation of Three-dimensional Urban Expansion: A Case Study of Yangzhou City, Jiangsu Province, China

With rapid urban development in China in the last two decades, the three-dimensional(3D) characteristic has been the main feature of urban morphology. However, the vast majority of researches of urban growth have focused on the planar area(two-dimensional(2D)) expansion. Few studies have been conducted from a 3D perspective. In this paper, the 3D urban expansion of the Yangzhou City, Jiangsu Province, China from 2003 to 2012 was evaluated based on Geographical Information System(GIS) tools and high-resolution remote sensing images. Four indices, namely weighted average height of buildings, volume of buildings, 3D expansion intensity and 3D fractal dimension are used to quantify the 3D urban expansion. The weighted average height of buildings and the volume of buildings are used to illustrate the temporal change of the 3D urban morphology, while the other two indices are used to calculate the expansion intensity and the fractal dimension of the 3D urban morphology. The results show that the spatial distribution of the high-rise buildings in Yangzhou has significantly spread and the utilization of the 3D space of Yangzhou has become more efficient and intensive. The methods proposed in this paper laid a foundation for a wide range of study of 3D urban morphology changes.

“破五唯”背景下上海市医务人员健康科普传播意愿及影响因素研究

目的在“破五唯”和卫生专业人员职称评审改革出台的背景下,分析公立医院医务人员健康科普传播意愿及其激励和制约因素,探讨提升医务人员健康科普传播意愿的有效路径。方法2022年11—12月,采用自制线上问卷对上海市4所三级甲等医院的医务人员进行问卷调查。内容包括医务人员基本信息、医务人员健康科普传播现状及需求分析、医务人员健康科普传播的意愿及影响因素等。结果共有762名医务人员参与本次调查,79.9%的人表示愿意参与健康科普传播。多因素logistic回归分析显示,中级职称、实现个人价值与社会责任感、增加患者资源、职称晋升、科普相关奖项、纳入绩效考核、缺乏科普技巧是影响医务人员健康科普传播的影响因素(P<0.05)。结论医务人员开展健康科普传播意愿强烈,医院应通过构建长效激励机制、加强科普能力培训和提升人文素养调动医务人员健康科普的积极性。

矿区践行生态文明建设高质量发展总体设计及案例

科教融合、产教融合立体化平台已成为推动生态文明建设和高质量发展的重要途径,各地政府出台了一系列支持政策,鼓励企业与高校合作,加强人才培养和科技创新。本文采用文献资料法、案例分析法和比较研究法等,在对国内外科教融合、产教融合实践进行梳理和分析的基础上,以中煤平朔矿区黄土高原矿区土地复垦野外科学观测研究站为基础构建的数据观测-规律发现-技术转让-政策制定一体化产学研协同平台为案例,分析了科教融合、产教融合发展的历程和成效,系统设计了基地在科学研究、教育教学、科学普及和文化建设等功能方面提升的内容和路径,旨在为我国同类企业提质增效、高校复合型人才培养及资源型城市绿色转型提供本土化可借鉴模式。

航天器姿态受限的协同势函数族设计方法

提出一种考虑航天器姿态约束的协同势函数设计方法,在姿态全局收敛的同时,保证姿态在机动过程中始终满足姿态约束.首先,建立航天器姿态指向约束模型,并针对每一个指向约束设计软约束区域;然后,基于“角度扰动”方法设计协同势函数族;接着,通过设计协同势函数族内函数切换规律,在软约束区域内构建满足姿态约束的势函数,并给出区域内势函数临界点分布的调整方法;最后,将所得的势函数用于航天器的避障控制,以比例-微分控制为例,通过数值仿真,验证该方法的有效性.

中美民用航空器水上救援体系建设现状分析与探讨

航空应急管理体系是民航发展的生命线,而航空器水上救援体系建设则是航空应急管理体系的重要内容。本文从中美民用航空器水上救援体系建设现状出发,客观分析我国民用航空器水上救援体系在标准建设、应急处置、救援装备、专业培训等方面存在的问题。认为可以通过完善民航水上救援标准体系、构建区域部门救援协调机制、加大专项救援设备研发力度、建立国家综合信息保障平台、合理布局水上救援培训基地等途径,进一步完善我国民用航空器水上救援体系的建设和发展。

An Alternating Direction Method of Multipliers for MCP-penalized Regression with High-dimensional Data

The minimax concave penalty （MCP） has been demonstrated theoretically and practical- ly to be effective in nonconvex penalization for variable selection and parameter estimation. In this paper, we develop an efficient alternating direction method of multipliers （ADMM） with continuation algorithm for solving the MCP-penalized least squares problem in high dimensions. Under some mild conditions, we study the convergence properties and the Karush-Kuhn-Tucker （KKT） optimality con- ditions of the proposed method. A high-dimensional BIC is developed to select the optimal tuning parameters. Simulations and a real data example are presented to illustrate the efficiency and accuracy of the proposed method.

《材料成形过程数值模拟》课程的案例型教学实践与持续改进

结合工程教育专业认证的持续改进要求,针对《材料成形过程数值模拟》课程理论性强、内容范围广、实践操作要求高的特点,推行案例型教学改革,通过导入企业工程案例、学校科研项目不断优化教学内容,通过引入企业工程师参与课程评价、反馈,不断完善评价方法。同时,与企业联合推进校企协同育人,将螺钉紧固件的热镦、热处理工艺等工程实际需求融入课程建设,促使教学内容更贴近材料成形“高精尖”制造业发展前沿,提高了工科专业仿真类课程培养学生解决复杂工程问题的能力。

ABUNDANT LOCALIZED COHERENT STRUCTURES FOR THE (2+1)-DIMENSIONAL LONG DISPERSIVE WAVE SYSTEM

In the present paper, a simple and direct method was proposed to solve the (2+ 1)-dimensional long dispersive wave equations. A variable-dependent transformation was intorducedto convert the equations into the simpler forms, which are coupled and linear partial differentialequations, then obtain its general solution. Some special types of the localized excitations, suchas oscillating dromion, multi-solitoff, multi-dromion, multi-lump and multi-ring soliton solutionsare derived by selecting the arbitrary functions appropriately.

基于数学模型对胞外聚合物吸附Cu^(2+)、Cd^(2+)的研究

文章利用三维模型构建出吸附曲面对活性污泥中胞外聚合物(EPS)对Cu^(2+)、Cd^(2+)吸附行为进行研究预测,并讨论离子竞争吸附机理。在单一金属体系中EPS对Cu^(2+)(534.72 mg/g)的吸附量要高于Cd^(2+)(504.71 mg/g)。通过三维模型模拟出三维吸附曲面可以看出Cu^(2+)的存在明显抑制了EPS对Cd^(2+)的吸附,但Cd^(2+)对Cu^(2+)的吸附干扰很小,EPS与Cu^(2+)的亲和力要高于Cd^(2+),其吸附过程更适用于Langmuir等温线,吸附质与吸附位点一一对应。结合红外光谱、三维荧光光谱和SEM-EDX分析表明,EPS在吸附前后材料形貌发生了明显变化,该现象出现的原因可能是金属离子的吸附是通过羧基、羟基、酰胺等活性官能团与金属离子成键及络合作用;同时离子交换也是EPS吸附金属离子的一个重要机制。该研究为进一步发掘利用胞外聚合物及后续应用提供理论依据和技术支持。

基于激光全息投影的数字媒体图像三维重构方法

数字媒体图像形态多为不规则,增加了微小细节的采集难度,导致其三维重构质量下降,因此提出基于激光全息投影的数字媒体图像三维重构方法。采用CCD摄像机与激光设备采集数字媒体图像,根据激光全息投影与衍射理论得到物光上各点相位与振幅,得到包含微小信息的激光全息投影图像。针对投影过程中产生散斑噪声,运用复合波片、毛玻璃调制物光相位,抑制光源的相干性,去除图像上噪声。采用包围盒算法获得光线射入物体的三维空间坐标,利用欧拉-拉格朗日方程建立图像三维重构数据场,实现数字媒体图像的三维重构。实验结果表明,所提方法能够有效去除重构过程中的噪声,保证重构后图像清晰度,降低了数字媒体图像三维重构的误差,缩短了重构的时间,所提出方法的重构均方误差最大不超过0.5,重构时间在10 s内。

阿联酋国家档案馆档案文化立体化传播的路径与启示

阿联酋作为少数几个举办过国际档案大会的发展中国家,很早就开始了立体化传播档案文化且成效显著。其优势主要表现在具有丰富的档案文化资源、重视政策保障、积极打造档案文化展示场景,传播路径包括营造节日性档案文化氛围、构造跨国档案文化圈。对我国的启示包括以用户为中心重视档案文化品牌建设、重视国际合作传播民族档案文化。

Exact(1+1)-dimensional Similarity Solutions of the Broadwell Model

The exact (1+1)\|dimensional similarity solutions of the Broadwell model are studied in a concise way. A new type of exact (1+1)\|dimensional similarity solutions of the Broadwell model are obtained. The conclusion that one\|dimensional Broadwell model cannot have multi\|dimensional similarity solutions is proved and the proof is simplified.

“双高”背景下提升高职毕业生就业竞争力研究--以就业需求为导向,以数学建模为抓手

在“双高”建设背景下,培养高素质技术技能人才,实现高职高专毕业生的优质就业,是职业教育的一项重要任务。该文通过分析当前高职高专院校毕业生就业竞争力不足的原因,聚焦数学建模竞赛,从基础性知识、创新性思维、应用性能力和职业素养四个维度出发,提出“一夯实二提升三锤炼”的构想,深刻剖析参加数学建模竞赛对提升高职高专毕业生就业竞争力的积极作用,并对数学建模课程教改提出若干思考。

新时代高校教师思想政治教育能力多维度提升研究

新时代的高校思想政治教育工作机遇与挑战并存。如何办好中国特色社会主义教育、用习近平新时代中国特色社会主义思想铸魂育人,已成为高校思想政治理论课教师亟须解决的问题。该文从辩证唯物主义认识论的哲学向度出发,分析指出高校思政课教师应从政治认知力、政治鉴别力和融合协同力三个维度全面提升能力,切实做好思想政治教育工作,全面充分地落实立德树人根本任务。

以“四化”立体式管理降低机采井能耗的应用实践

机采井是石油开采的重要手段,是油田生产的主要能耗设备,其系统效率的高低直接反映了油田的整体管理水平,直接关系到油田的经济效益。某厂机采井节能工作秉承节能减排、绿色低碳、清洁高效的发展理念,有序的构建机采井能耗“四化”立体式管理体系,转变以往传统管理方法,将机采井能耗划分为“地上、地下、整体”立体式三节点,通过实现“目标智能化、分析系统化、措施个性化、制度规范化”的“四化”立体式管理,实现机采系统能耗效益最大化。2022年机采井累计应用软件措施治理4 954井次、硬件措施治理14 751台(套),年节电量为1.269 5×10^(8)kWh,折合标煤为4.24×10^(4)t,实现CO_(2)减排量为1.265 7×10^(8)kg,年节电效益为8 963.66万元。整体应用后,2022年系统效率为32.9%,吨液耗电为6.42 kWh,与2021年同期对比系统效率上升1.8%,吨液耗电下降1.29 kWh,效果显著。

Integrability and Solutions of the (2+1)-Dimensional Broer-Kaup Equation with Variable Coefficients

The integrability of the(2+1)-dimensional Broer-Kaup equation with variable coefficients(VCBK) is verified by finding a transformation mapping it to the usual(2+1)-dimensional Broer-Kaup equation(BK).Thus the solutions of the(2+1)-dimensional VCBK are obtained by making full use of the known solutions of the usual(2+1)dimensional BK.Two new integrable models are given by this transformation,their dromion-like solutions and rogue wave solutions are also obtained.Further,the velocity of the dromion-like solutions can be designed and the center of the rogue wave solutions can be controlled artificially because of the appearance of the four arbitrary functions in the transformation.

内科护理人员应用以人为本管理模式的效果分析

目的探究内科护理人员应用以人为本管理模式的效果。方法选择2021年1月—2022年12月吉林省肿瘤医院内科21名在职护理人员作为研究对象,根据时间不同分为管理前(2021年1—12月)和管理后(2022年1—12月)。管理前实施传统管理模式,管理后实施以人为本管理模式,对比管理前后护理人员人文关怀能力、工作压力以及职业使命感。结果管理后护理人员人文关怀能力评分显著高于管理前,差异有统计学意义(P<0.05);管理后护理人员工作压力评分显著低于管理前,差异有统计学意义(P<0.05);管理后护理人员职业使命感评分显著高于管理前,差异有统计学意义(P<0.05)。结论内科护理人员应用传统管理与以人为本管理两种管理模式的对比之下,以人为本管理模式在改善护理人员人文关怀能力、工作压力以及职业使命感方面效果更佳。

生计资本对农户贫困代际传递的影响——以女性劳动参与的中介效应为典型

基于2018年中国家庭追踪调查数据(CFPS),构建Probit模型和中介效应模型,实证检验了生计资本对农户贫困代际传递的影响以及女性劳动参与的中介效应。研究发现,生计资本显著阻断农户贫困代际传递,女性劳动参与降低了多维贫困概率,在生计资本阻断农户贫困代际传递中具有显著的中介效应。因此,要加大对农户生活与生产的扶持力度,重视农村教育投资和教育公平,建立多层次社会支持网络,创造更加灵活的就业和创业方式,多举措阻断农户的贫困代际传递。