A Into-Plane Rotating Micromirror Actuated by a Hybrid Electrostatic Driving Structure

A novel into-plane rotating rnicromirror actuated by a hybrid electrostatic driving structure is presented. The hybrid driving structure is made up of a planar plate drive and a vertical comb drive. The device is fabricated in SOI substrate by using a bulk-and-surface mixed silicon micromachining process. As demonstrated by experiment, the novel driving structure can actuate the mirror to achieve large-range continuous rotation as well as spontaneous 90°rotation induced by the pull-in effect. The continuous rotating range of the micromirror is increased to about 46° at an increased yielding voltage. The measured yielding voltages of the mirrors with torsional springs of 1 and 0.5μm in thickness are 390 - 410V and 140 - 160V, respectively. The optical insertion loss has also been measured to be --1.98dB when the mirror serves as an optical switch.

Study on the Characteristics and Driving Forces of Changes of the Urban Land-Use Structure in Wuhan in 1990s

On the basis of the information entropy and equilibrium degree of urban land-use spatial structure, the paper analyzes the characteristics and rules of urban land-use spatial structure changes in Wuhan in 1990s, in which the types of land-use are shrinking and urban land-use changes are disequilibria. With PCA and GRA employed, the driving forces have also been analyzed. The driving force of city welfare and social structure, the towing force of city industrial structure transition, and the pressing force of city construction and reconstruction are main momentum factors. Moreover, the latter forces are more significant.

A novel 300 kW arc plasma inverter system based on hierarchical controlled building block structure

To date, the high power arc plasma technology is widely used. A next generation high power arc plasma system based on building block structure is presented. The whole arc plasma inverter system is composed of 12 paralleled units to increase the system output capability. The hierarchical control system is adopted to improve the reliability and flexibility of the high power arc plasma inverter. To ensure the reliable turn on and off of the IGBT module in each building block unit, a special pulse drive circuit is designed by using pulse transformer. The experimental result indicates that the high power arc plasma inverter system can transfer 300 kW arc plasma energy reliably with high efficiency.

Bionic structure of shark's gill jet orifice based on artificial muscle

Based on the biological prototype characteristics of shark’s gill jet orifice,the flexible driving characteristics of ionic exchange polymer metal composites(IPMC)artificial muscle materials and the use of sleeve flexible connector,the IPMC linear driving unit simulation model is built and the IPMC material-driving dynamic control structure of bionic gill unit is developed.Meanwhile,through the stress analysis of bionic gill plate and the motion simulation of bionic gill unit,it is verified that various dynamic control and active control of the jet orifice under the condition of different mainstream field velocities will be taken by using IPMC material-driving.Moreover,the large-deflection deformation of bionic gill plate under dynamic pressure and the comparative analysis with that of a rigid gill plate is studied,leading to the achievement of approximate revised modifier from real value to theoretical value of the displacement control of IPMC.

Optimum Structural Design of a Chain-Driving Pumping Unit

In this paper the pumping unit of type QLCJ14-6 is studied.Through the belt driving unit,the mo-tor drives the driving sprocket in which the rotation rate has been reduced by the reduction ge arbox.The locus chain moves between the driving sprocket and upper sprocket which are vertically set.There's a special chain element in the locus chain,which drives the reciprocating holster with the main shaft linchpin and slide block.The r reciprocating g holster could only move up and down when the locus chain moves in a circle.In this way the up and down stroke of the sucker rod and the mac hine is realized.The lower end of the reciprocating holster is con-nected with the equilibrium system to make the structure balance.The balancing cylinder is re-placed by the balancing block to make the structure simplified.

Deployment Dynamic Modeling and Driving Schemes for a Ring-Truss Deployable Antenna

Mesh reflector antennas are widely used in space tasks owing to their light weight,high surface accuracy,and large folding ratio.They are stowed during launch and then fully deployed in orbit to form a mesh reflector that transmits signals.Smooth deployment is essential for duty services;therefore,accurate and efficient dynamic modeling and analysis of the deployment process are essential.One major challenge is depicting time-varying resistance of the cable network and capturing the cable-truss coupling behavior during the deployment process.This paper proposes a general dynamic analysis methodology for cable-truss coupling.Considering the topological diversity and geometric nonlinearity,the cable network's equilibrium equation is derived,and an explicit expression of the time-varying tension of the boundary cables,which provides the main resistance in truss deployment,is obtained.The deployment dynamic model is established,which considers the coupling effect between the soft cables and deployable truss.The effects of the antenna's driving modes and parameters on the dynamic deployment performance were investigated.A scaled prototype was manufactured,and the deployment experiment was conducted to verify the accuracy of the proposed modeling method.The proposed methodology is suitable for general cable antennas with arbitrary topologies and parameters,providing theoretical guidance for the dynamic performance evaluation of antenna driving schemes.

Dual Instinct and Structural Theories: DSM-5-TR

The genetic based Dual Instinct Theory is determined by evolutionary history. Aggression is required for survival and sex for propagation of species. Aggressive and sexual drive derivatives with their corresponding defence mechanisms are combined with biologically based stages of infant/child development and the functional entity of Structural Theory. This model of human nature is the applied to the diagnostic categories of DSM-5-TR. Objectives: To follow the innate Dual Instinct Theory from life to death and through Artificial Intelligence;connect it with biological stages of development of the Structural Theory and illustrate its manifestations in DSM-5-TR classifications. Method: Review of selected published literature. Applying the principle of focus and cognition of informed clinical observation of innate drive derivatives in conjunction with The Structural Theory. Both theories are functional entities with no structures involved. Sigmund Freud’s biologically based stages of development;oral, anal, genital pubic, adult, and geriatric along with a variety of unconscious, automatic, and persistent defense mechanisms are selectively folded into diagnosis listed in the manual.

内置式永磁直驱列车车轴设计与强度校核

轴箱内置式永磁直驱牵引系统为内支承结构,现行的轴箱外置式车轴结构和强度校核标准不适用于此结构。设计了轴箱内置式永磁直驱列车的车轴并对其进行了强度校核,计算了作用在车轴各个截面上的最大弯曲应力幅,参照EN13104标准,对传统车轴强度校核算法进行了改进。选取了车轴几个主要截面进行强度校核,并进行了结构优化设计。结果表明,车轴在直行紧急制动状态下,车轴所受应力最大,轴表面最大应力和轴孔最大应力出现在车轴轴身靠近联轴器安装座一侧,均低于许用应力。

中国数字经济高质量发展:测度、演化与驱动因素

基于五大发展理念构建数字经济高质量发展评价指标体系,测度我国30个省份2011—2021年数字经济高质量发展水平并进行实证分析。研究发现:我国数字经济高质量发展呈现“东高西低”“南高北低”的空间格局,地区差异主要来源于东中西部区域间差异与南北区域内部差异,结构差异主要来源于数字创新与共享水平差异;数字经济高质量发展呈现“等级锁定”与“动态转移”现象共存的演化特征,并且演化特征受空间溢出效应影响;全国和各个区域表现出普遍的β收敛特征,但收敛速度不同,空间溢出效应加快收敛速度;数字技术行业优化度、数字创新转化效率和数字人才支撑是驱动数字经济高质量发展的关键因素。

Biomimetic Lightweight Design of Legged Robot Hydraulic Drive Unit Shell Inspired by Geometric Shape of Fish Bone Rib Structure

The lightweight design of hydraulic quadruped robots,especially the lightweight design of the leg joint Hydraulic Drive Unit(HDU),can improve the robot's response speed,motion speed,endurance,and load capacity.However,the lightweight design of HDU is a huge challenge due to the need for structural strength.This paper is inspired by the geometric shape of fish bones and biomimetic reinforcing ribs on the surface of the HDU shell are designed to increase its strength and reduce its weight.First,a HDU shell with biomimetic fish bone reinforcing ribs structure is proposed.Then,the MATLAB toolbox and ANSYS finite element analysis module are used to optimize the parameters of the biomimetic reinforcing ribs structure and the overall layout of the shell.Finally,the HDU shell is manufactured using additive manufacturing technology,and a performance testing platform is built to conduct dynamic and static performance tests on the designed HDU.The experimental results show that the HDU with biomimetic fish bone reinforcing ribs has excellent dynamic performance and better static performance than the prototype model,and the weight of the shell is reduced by 20%compared to the prototype model.This work has broad application prospects in the lightweight and high-strength design of closed-pressure vessel components.

500 kV输电线路绝缘子安装质量验收机器人机构设计

【目的】针对500 kV输电线路中水平玻璃绝缘子安装质量验收工作中存在的作业难题,提出一种绝缘子安装质量验收机器人机构设计方案。【方法】首先,根据作业环境建立了绝缘子验收机器人三维模型,利用D-H参数法对检测机构进行正运动学分析;然后,为解决机器人在不同倾斜角绝缘子串上的稳定爬行问题,对机器人驱动机构进行优化,并在5°、10°和15°这3种不同倾斜角绝缘子串上分别进行了运动学仿真;最后,对优化后的履带式机器人分别进行纵向和横向稳定性受力分析,并对减振弹簧进行了受力仿真分析。【结果】结果表明,和多轮式驱动机构相比,履带式驱动机构的机器人质心在Z轴的速度稳定性分别提升了84.73%、75.76%、73.70%;在X轴的偏移距离稳定性分别提升了40.47%、44.21%、74.14%。优化后机器人具有更好的稳定性,为后续绝缘子机器人整体设计提供了支撑。

炼钢厂筛网机构改进设计

针对炼钢厂筛网堵塞难以清理的问题,在下层筛网增加了顶针结构。文中对筛网的传动结构和运动结构进行了分析,为筛网旋转机构和筛板的运动轨迹的设计参数做理论准备。利用电动机和传动结构对筛网进行驱动,带动筛网和顶针对煤料进行疏松。通过计算机模拟,可以确定筛网与顶针的运动轨迹及相应的运动方式,从而构建出电动机与连动丝杆机构的数学模型,以及它们之间的协调配置。最后利用SolidWorks软件将筛网机构的每一个组零部件精确地构建成三维结构,完成虚拟装配。该筛网机构具有结构简单、操作方便、节省劳动力的优点,适用于大规模物料过滤,可提高工业生产效率。

带式输送机传动滚筒强度分析及结构优化

以DTL180型带式输送机为例进行分析,利用ANSYS软件构建了带式输送机传动滚筒的强度分析模型。结果发现,传动滚筒结构设计方面存在较大冗余,实际应力和位移变形量比许用值低很多。以传动滚筒轴直径、筒壳厚度、辐板厚度三个结构参数为优化对象开展优化改进工作,在确保滚筒强度的基础上,使得上述三个结构尺寸大幅度减小,传动滚筒总重量降低了22.57%。将结构优化后的带式输送机传动滚筒应用到新景煤矿中进行工程应用,发现其整体运行良好,使得结构件的加工成本降低,经济效益显著。

冲击地压煤层回采巷道过构造带超前卸压及加固技术研究

针对冲击地压煤层回采巷道过构造带面临冲击地压危险性大、围岩控制难度高等问题,提出综合采用卸压+超前加固方式确保巷道掘进安全,并在11303运输巷进行工程应用。根据生产计划安排,在邻近的11301综采工作面回采过地质构造带期间就通过水力卸压方式弱化顶板,降低11303运输巷围岩应力集中程度;在11303运输巷过地质构造带前通过大直径钻孔、底板卸压槽进行卸压,同时过构造带时通过超前注浆加固破碎围岩,降低振动冲击可能引起的冒顶、围岩失稳等影响。工程应用后,11303运输巷掘进过地质构造带期间围岩始终保持稳定,巷道变形量较小,表明现场使用的卸压+加固技术措施效果显著。

The Research on Toroidal Drive

This paper presents the basic principle, meshing, structural design, manufacturing, installation and test on toroidal drive.

Stability analysis for main roof of roadway driving along next goaf

Focusing on the stability of surrounding rock around the roadway driving along next goaf with a narrow coal pillar, a mechanics model of the triangle block structure of main roof above the roadway is established, and the sliding stability coefficient K 1 and the rotation stability coefficient K 2 are proposed to describe the stability of the triangle block structure quantitatively. The structure can keep a self stability before and after the roadway excavation, at the stage of mining induced effect, the stability of the structure is lowered, and the structure may become instability with decreasing the coal strength, increasing the mining height of working face and the mining depth.

Evaluation and Driving Force Analysis of Cultivated Land Quality in Black Soil Region of Northeast China

Cultivated land is an important natural resource to ensure food,ecological and economic security.The cultivated land quality evaluation(CQE)is greatly significant for protecting and managing cultivated land.In this study,320 counties in the black soil region of Northeast China(BSRNC)represent the research units used to construct the CQE system measuring the soil properties(SP),cultivated land productivity(CLP),ecological environment(EE)and social economy(SE).The total of 19 factors were selected to calculate the integrated fertility index(IFI)and divided into grades.Simultaneously,we used the coupling coordination degree model to comprehensively analyze the spatial pattern of the cultivated land quality(CLQ)in the BSRNC,and use the structural equation model(SEM)to analyze the driving mechanism.The results show the following:1)The CLQ of 262 counties in the BSRNC is in a state of coupling and coordination,and the coupling and coordination degree presents a spatial distribution pattern of‘high in the southwest and northeast,low in the northwest and southeast’.The coordinated development degree of 271 counties is between 0.4 and 0.6,which is in a transitional state between coordination and disorder.2)The CLQ in the BSRNC is generally good,with an average grade of 3.High-quality cultivated land accounts for 58.45%of all counties,middle-and upper-quality cultivated land accounts for 27.05%,and poor-quality cultivated land accounts for 14.49%.3)The SEM analysis shows that the SP,CLP,EE,and SE all influence the CLQ.Among them,the SP has the largest driving force on the CLQ,while the SE has the smallest driving force on it.The results confirm that the main factors affecting the evaluation results are crop productivity level,normalized difference vegetation index,ratio vegetation index,difference vegetation index,and organic carbon content.When implementing protection measures in counties with a low CLQ,considering a balanced coordination of multiple systems and reasonably controlling the quality degradation are important.This study provides the current situation and driving factors of the CLQ in the BSRNC and will play an important role in black soil governance and utilization.

中国省域交通碳排放空间关联格局的驱动特征

利用我国2003~2020年省级交通碳排放数据,基于模体结构分析和指数随机图模型对中国交通碳排放空间关联网络的宏观格局、微观连通和驱动特征进行研究.结果表明,中国交通碳排放空间关联网络呈现周期波动特征,等级均衡化发展和核心虹吸的空间分布,演化出少核心—多半核心—边缘新格局,碳转移路径表现出明显的空间惰性与时间惯性以及区域集中性;经纪属性在推动跨区域交通协同减排的经济活动中发挥重要作用;内生网络的互惠性、连通性、集聚性对交通碳排放网络形成具有重要驱动作用,行为者属性中发出、接收、抑制、互惠的驱动关系明显,外部网络的影响具有明显的地理邻近效应,呈现出地理距离衰减规律特征.由此提出短期重大项目驱动,推动绿色交通转型联动;中期提升协同水平,加强跨区域交通碳减排协调机制;长期顶层零碳设计,工业化-产业化-市场化全面协同等政策建议.

How to Achieve a Warp Drive

In this paper, we delve into the intrinsic nature of mass and gravity, as per the amplitude modulation interpretation of the quantum theory. We explore the idea that the elementary constituent is an electromagnetic configuration that interacts with the quantum field, leading to the emergence of inertia and gravity as a reaction to the exchange with the quantum field. While these two phenomena have a common origin, they are distinct. Our proposal suggests manipulating the connection between the quantum field and the particle using high-frequency electromagnetic fields, thereby making a warp drive possible.

工业智能化能成为产业结构升级的新动能吗

工业智能化作为新型工业化过程中新的增长引擎,对推动中国产业结构升级发挥重要作用。基于2004-2021年中国省域面板数据,从直接动力、间接渠道、非线性效应等维度考察工业智能化对产业结构升级的影响效应与作用渠道。研究发现:工业智能化在总体上推动产业结构升级,且有显著的滞后效应;劳动力结构优化是工业智能化间接驱动产业结构升级的作用渠道。分维度回归结果表明,工业智能化会促进产业结构高级化,加剧产业结构不合理,对高级化维度的驱动作用强于合理化维度;分区域回归结果显示,工业智能化在沿海地区产生的驱动效应强于内陆地区,主要通过产业结构高级化实现;工业智能化具有明显的积累效应和规模效应,对产业结构升级呈现边际效应递增的非线性特征。据此,从加大智能化基础设施建设、优化地区劳动力结构、发挥地区比较优势三方面提出相关政策建议。