Common Fixed Point Result of Multivalued and Singlevalued Mappings in Partially Ordered Metric Space

In recent times the fixed point results in partially ordered metric spaces has greatly developed. In this paper we prove common fixed point results for multivalued and singlevalued mappings in partially ordered metric space. Our theorems generalized the theorem in [1] and extends the many more recent results in such spaces.

Embedded Programmable Single Point Multiple Output Intelligent Data Acquisition and Transmission System

To effectively solve the problems of inconsistent communication protocols in automatic monitoring equipment,and limited data acquisition transmission and monitoring equipment,this paper developed programmable single point multiple output intelligent data acquisition and transmission system. It made an in-depth elaboration of the data acquisition and transmission system from hardware design,software architecture and principle,main functions and technical parameters. Finally,it came up with four innovation points:(i) intelligent(automatic)matching a variety of communication protocols for environmental monitoring equipment,(ii) realizing multi-protocol and multi-target parallel data transmission,(iii) realizing remote dynamic input of control instructions through wired or wireless network,and(iv) supporting configuration(process) simulation of field equipment DCS operating conditions.

Analysis for the Deployment of Single-Point Mooring Buoy System Based on Multi-Body Dynamics Method

Deployment of buoy systems is one of the most important procedures for the operation of buoy system. In the present study, a single-point mooring buoy system which contains surface buoy, cable segments with components, anchor and so on is modeled by applying multi-body dynamics method. The motion equations are developed in discrete node description and fully Cartesian coordinates. Then numerical method is used to solve the ordinary differential equations and dynamics simulations are achieved while anchor is casting from board. The trajectories and velocities of different nodes without current and with current in buoy system are obtained. The transient tension force of each part of the cable is analyzed in the process of deployment. Numerical results indicate that the transient payload increases to a peak value when the anchor is touching the seabed and the maximum tension force will vary with different floating configuration. This work is helpful for design and deployment planning of buoy system.

Analysis on the Seismic Response of Soil Slopes Based on the Multi-point Input Method

In general, the seismic response analysis in earthquake engineering assumes that the vibration parameters of the target and the contact surface of the external media are identical,i. e., single point input. However, earthquake energy has an attenuation phenomenon in wave propagation,so a wide range of soil slopes and the external medium contact surface of different input points on motion are not identical. If we consider single point input only, it may not correspond with reality, so it is necessary to carry out research on multi-point input methods. Based on the 2-D slope model,single-point input and multi-point input are performed respectively to analyze and compare their similarities and differences in the perspectives of the characteristics of seismic response of soil layer and plastic zone distribution to provide a reference for the seismic design of slopes. The results show that in the perspective of soil seismic response analysis,the peak acceleration output and peak velocity output under multi-point input are greater than the peak values under single point input at the same monitoring point,the peak appearing time is also earlier than that of the single point input; in terms of the plastic zone distribution,the multi-point effect is manifested as the presence of more obvious tensile shear failures; in the perspective of safety coefficient,the safety coefficient under each multi-point input is smaller than that of single point input,a difference of about 7 % or so. In summary,multi-point input is more reasonable and practical than single point input,so multi-point input should be considered in seismic design.

Improvement in resolution of fiber-laser photoacoustic tomography based on a virtual-point concept

In this study,a virtual-point concept was introduced into fiber-laser photoacoustic tomography to improve the elevational image resolution.The flexible fiber laser was bent into an arc shape to conform to the ultrasound wavefront,which formed an ultrasound focus at the center of the arc.The synthetic aperture focusing technique was utilized to reconstruct the images;as a result,the elevational resolution particularly within the out-of-focus region was considerably improved compared to the resolution of an image retrieved by multiplexing the PA time-resolved signals with sound velocity.The all-optical fiber-laser photoacoustic tomography system with a high spatial resolution has potential for various applications,including biomedical research and preclinical/clinical diagnosis.

Focus of the Construction of the Ecological Civilization in Socialism with Chinese Characteristics in the New Era

Marx and Engels related and analyzed the relationship between humans and nature as early as more than 100 years ago. and they revealed the interdependent and indivisible relationship between humans and nature in the development of the human society and history from the perspectives of the dialectical materialism and the historical materialism. The Communist Party of China has always attached great importance to the ecological problems. The ＂17th CPC National Congress＂ wrote for the first time the ＂ecological civilization＂ into the political report. The ＂18th CPC National Congress＂ placed the construction of the ecological civilization in a prominent position, emphasizing that the ecological construction should be integrated into all aspects and the whole process of the economic construction, the political construction, the cultural construction and the social construction. The report of ＂19th CPC National Congress＂ promoted the construction of the ecological civilization to a new strategic level, and made an Omni-directional discussion from a new height, the new goals. the new values, the new roles and the new initiatives and other aspects.

Decision Making Approach with Focus Point and Regret

In this paper, decision making under uncertainty with regret is studied. The alternative is evaluated by focus point to fit the feature that the decision process cannot be repeated many times. If the objective captured by focus point is not achieved, there is a regret. The regret of an action is determined by the focus point of the other actions. The set of the alternatives available is updated by the regret threshold, and the optimal action can be obtained by the selected focus point of each alternative. The proposed method is a new fundamental alternative for decision making under uncertainty. Using focus point as reference gives the regret a clear meaning. The decision making procedure matches the intuitive expectations of human being. It explains the phenomena that does not conform to classical decision making theory.

Review on Development of Small Point-Focusing Solar Concentrators

The technology of small point-focusing concentrator of solar energy has been developing rapidly in recent years owing to its compact structure and high collecting efficiency. This report presents important developments of small point-focusing concentrator in the past decade. This kind of solar concentrator refers to the parabolic dish concentrator, the point-focusing Fresnel lens, and the Scheffler reflector. Technological advances of these concentrators and the related performances have been presented. There are three main mirror fabrication technologies for dish concentrator, which are high polishing metal, silver-glass mirror and vacuum-membrane. Polymethyl methacrylate is widely used as material in Fresnel lens. Many scholars have proposed new lens shape to improve the uniformity of focusing. The Scheffler reflector has a characteristic of fixed focus, but its design parameters are not perfect so current research focuses on the theoretical calculation of the mirror. In addition, typical applications of the small point-focusing concentrator in photovoltaic system, solar thermal system, solar chemical system, and day-lighting system are summarized. Upon listing the important publications in open literature, a category of main applications of such kind of solar collector is provided based on the working characteristics of the system.

用于多通道单分子定位的高精度图像配准方法

单分子定位技术可以绕过光学系统的衍射限制,在生物样品的单粒子追踪和超分辨显微成像中得到了广泛应用.多通道单分子定位采用多个成像通道,可以实现对不同目标的同时追踪或多色超分辨成像,也可以提升单粒子追踪的轴向深度或实现更高的定位精度和密度.但各通道图像间的差异会影响协同定位或定量分析,因此图像配准是其图像数据预处理的关键环节;且由于单分子定位精度高,其对多通道图像配准精度的要求也很高.现有技术一般采用基于控制点的配准方法,且多采用复杂而精密的方式来获取基准物网格图像用于定位得到控制点对,以实现高精度图像配准,对样品或实验设备要求高,难以直接推广.为此,本文基于局部非线性变换和误匹配点剔除,发展了一种可以直接采用随机分布荧光珠样品作为基准物的高精度图像配准方法,通过在特征匹配和变换模型参数估计的过程中对控制点进行监测和迭代筛选,以剔除因单分子定位不准确或精度差而导致未精确匹配的控制点对,从而消除以随机分布荧光珠样品作为基准物时对于控制点准确获取和精确匹配所带来的不良影响,同时采用基于局部加权平均的二阶多项式拟合进行变换模型参数估计,以更好地适用于不同通道间存在局部非线性形变的情形.结果表明,采用该方法只需要3次迭代,就可以将未准确定位和精确匹配的控制点对找到并剔除,从而实现更准确的变换模型参数估计,将配准精度提高一个数量级,在图像局部非线性形变情况严重的正交像散双通道单分子定位成像系统中实现了约6 nm的配准精度.

An Innovative Scientific Theory to Create a “New Engine for Compressing and Transporting Matter and Creating an Independent Ultra-Gravitational Magnetic Field” for Flight on Earth and Space

This research proposes a new theory in the field of physics and space technology, based on several scientific hypotheses and conclusions, as it plans to manufacture a “new magnetic focus” by means of high-speed centrifugal engines, by equipping a group of them, and installing heavy, dense fans, not for the purpose of air pressure, Rather, it works to rotate at a speed of up to 1000 kilometers per hour at an angle of 45 degrees, and is lined up in front of each other in a circle, so that the final result is to transfer the effort and weight of the propellers to an upper point in their midst, and this point will reach a large degree of density, size and mass, causing the generation of a point independent magnetic attraction, which pulls the motors upward, as a result of the mutual gravitational effect created by the motors. These hypotheses need a large number of experiments, applications, and analyze the use of specialists in physics, technology, technology, engine engineers, and others, and the correct results will cause a major revolution in the field of space technology, and this theory will be relied upon in many means of land, air, and space transportation and different fields.

一种单级式高频隔离光伏并网逆变器及其调制方法

针对光伏并网系统中可实现双向功率流的单级式高频隔离逆变器,提出一种调制方法,结合电压钳位技术,解决了传统高频隔离光伏并网逆变器变压器二次侧的电压尖峰和振荡问题。该逆变器为两级功率变换,对其工作过程及原理进行详细分析,建立等效电路模型,并推导出该逆变器的数学模型。为弥补传统多谐振控制器的不足,研究一种针对单级式高频隔离光伏并网逆变器的相位补偿的多谐振控制器,在单级式结构中完成最大功率点跟踪(MPPT)和对并网电流的精确控制。最后对所提高频隔离光伏并网逆变器的调制方法及其控制策略进行实验验证。

基于三维点云建模的单木胸径非接触式测量

为提升单木胸径三维点云非接触式测量的便利性和精度,提出一种基于三维点云建模的单木特征参数提取与检测方法.首先,采用IMAGER 5010陆地式三维激光扫描仪获取单木多方向点云数据,并采用最近点搜索法实现多方向点云配准;其次,结合统计滤波和几何滤波滤除大尺度点云噪声,采用改进的双边滤波算法消除小尺度点云噪声,再通过包络网格法进行点云数据精简;然后,通过蚁群算法对单木胸高处的散乱点云进行优化排序;最后,对胸高处的排序点云进行三次B样条轮廓线拟合及单木胸径计算.实验结果表明,本方法可有效实现多方向点云配准和滤除不同尺度点云噪声,蚁群算法可以较好地逼近全局最优解、收敛效率高,采用蚁群算法对胸高处散乱点云优化排序后,单木胸径的测量精度和稳定性都得到较好的提升,测量相对误差均在技术规定的1.5%以内,可实现单木胸径的远距离非接触式快速精确测量.

多点扫描与单点模式全视网膜激光光凝术治疗重度非增生期糖尿病视网膜病变患者的效果对比

目的探讨多点扫描与单点扫描模式全视网膜激光光凝术(PRP)治疗重度非增生期糖尿病视网膜病变(NPDR)患者的临床效果。方法选取2023年1月至2023年6月江西医专第一附属医院收治的50例(97眼)重度NPDR患者作为研究对象,按照随机数字表法分为实验组(n=25,48眼)与对照组(n=25,49眼)。实验组给予多点扫描模式PRP,对照组给予单点扫描模式PRP。比较两组临床疗效,治疗前后视野平均阈值(MS)、黄斑中心凹厚度(CMT)、闪光视网膜电流图(F-ERG)a波与b波、平均视网膜神经纤维层厚度(RNFL)、激光能量、光斑数量、能量密度及术后并发症发生情况。结果两组临床疗效及治疗总有效率比较差异无统计学意义。治疗后1 d、1个月时,两组MS均小于治疗前,CMT均大于治疗前,差异有统计学意义(P<0.05);治疗前及治疗后1 d、治疗后1个月,两组MS、CMT比较差异均无统计学意义。治疗后1 d,两组F-ERG a波、b波均小于治疗前,但实验组大于对照组,差异有统计学意义(P<0.05);治疗后1个月,两组F-ERG b波小于治疗前,差异有统计学意义(P<0.05);治疗前、治疗后1个月,两组F-ERG a波、b波比较差异无统计学意义。治疗后1个月,两组平均RNFL均小于治疗前,差异有统计学意义(P<0.05);治疗前、治疗后1个月,两组平均RNFL比较差异无统计学意义。实验组激光能量高于对照组,能量密度低于对照组,差异有统计学意义(P<0.05);两组光斑数量比较差异无统计学意义。两组视网膜前出血、玻璃体积血、玻璃体视网膜增生发生率比较差异无统计学意义。结论不同模式PRP治疗NPDR患者均可取得良好的临床效果,但多点扫描激光对周边视野、视网膜光感受器及内核细胞层损伤更小,在促进治疗后视力恢复方面相较单点模式更具优势。

聚焦解决模式联合耳穴贴压对老年糖尿病患者满意度及睡眠质量的影响

目的:观察聚焦解决模式联合耳穴贴压对老年糖尿病患者满意度及睡眠质量的影响。方法:选取2022年4月至2023年4月厦门大学附属第一医院内分泌糖尿病科老年糖尿病患者92例为研究对象,按照随机投掷法分为对照组和观察组,每组46例。对照组给予聚焦解决模式干预,观察组在对照组基础上加耳穴贴压,均干预6个月。比较2组干预前后血糖水平、睡眠质量变化及患者满意度。结果:干预后,2组空腹血糖、餐后2 h血糖、糖化血红蛋白水平均较本组干预前降低(均P<0.05),且观察组均明显低于对照组(均P<0.05)。干预后,2组匹兹堡睡眠质量指数(PSQI)量表各项评分均较本组干预前降低(均P<0.05),且观察组均明显低于对照组(均P<0.05)。观察组满意度为95.65%(44/46),对照组满意度为82.61%(38/46),观察组满意度高于对照组(P<0.05)。结论:聚焦解决模式联合耳穴贴压,不仅能有效控制老年糖尿病患者的血糖水平,还能提高其睡眠质量,满意度高。

单洞双线中隔墙马蹄形隧道成型质量分析

单洞双线区间单管隧道由于防灾送风排烟通道,中间隔离墙和疏散通道施工时存在诸多偏差(因现场定位、浇筑胀模等)、隧道雾气严重(控制点间距较远,无法定向),内部结构表面潮湿(激光无法反射)等诸多因素影响,采用常规全站仪单点测量无法实现断面数据采集,基于三维激光扫描技术的大直径盾构法单洞双线、有中隔墙马蹄形隧道断面处理技术,采用三维激光扫描仪获取二衬结构海量点云数据,借助cyclone、HDS、CAD多种处理手段相融合,分析隧道内断面变形、隧道收敛、施工偏差等情况。

基于单片机的农业大棚多点温度监测系统设计

【目的】对现代农业大棚室内温度进行实时监测,为农作物提供最优的生长环境。【方法】设计了一种基于单片机、DS18B20数字温度传感器、串口通信的多点无线温度监测系统。该系统以STC89C52单片机为核心处理器,以LCD1602为下位机显示模块,通过温度传感器定时采集并发送节点温度数据,利用循环方式解析接收数据,将数据发送给无线传输模块,与上位机端实现数据交互。同时,基于51单片机,对多点温度监测系统进行了可靠性与可行性验证。【结果】报警显示状态与预期设置一致,上位机接收数据与下位机监测数据一致,验证了系统的可行性与可靠性。【结论】该系统能实现多点温度监测、阈值报警、无线传输等功能,可对大棚运行状态进行实时监测与分析,提高大棚管理效率,具有一定的实际应用价值。

基于惯导轨检仪的单侧CPⅢ多点测量设站方法研究

在只有单侧CPⅢ点情况下,由于连续CPⅢ点在三维空间中几乎位于同一直线上,易导致惯导轨检仪多点设站精度不可靠,为了解决该问题,通过采用惯导轨检仪实测横滚角来获得旋转矩阵,再将测站坐标系纠正至CPⅢ坐标系,以实现惯导轨检仪在单侧CPⅢ铁路中多点测量高精度设站。对借助惯导轨检仪实测横滚角纠正测站坐标系至CPⅢ坐标系旋转矩阵的方法进行论证,首先从理论上证实了可以采用横滚角纠正坐标系的方式实现惯导小车单侧CPⅢ多点测量高精度设站,再通过数据验算证明了该方法的正确性与可行性。研究表明,采用单侧4个CPⅢ点常规设站,平面精度大于10 mm,高程精度大于100 mm,难以满足测量需要;而同样情况下采用本方法设站,平面和高程精度均小于2.5 mm;本方法设站精度与全站仪至CPⅢ距离和CPⅢ点数量有关,建议实际应用中采用6个CPⅢ点进行设站测量,以确保设站精度满足平面小于1 mm,高程小于1.5 mm。

伽玛射线测量径流泥沙含量算法中质量吸收系数优选及其对测量误差影响的分析

质量吸收系数是伽玛射线测量径流泥沙含量理论计算公式中由伽玛射线记数率确定泥沙含量的基本参数。该文研究了确定质量吸收系数的多点法和单点法。在多点法中 ,提出了确定质量吸收系数的回归方法 ,推导了由大量 (多点 )试验数据计算质量吸收系数的回归公式。采用大量实测数据由回归公式确定的质量吸收系数准确且精度较高 ,能在很大程度上消除随机误差的影响。而单点法通过几个特殊的取值点 (单点 )来估算质量吸收系数 ,具有参数确定快速、物理概念明确的优点。另外 ,该文从理论上分析了质量吸收系数变化对泥沙含量测量精度的影响 ,结果表明质量吸收系数的相对变化与泥沙含量的相对变化成正比例关系 ,且比例系数为 1。从而确定了两种方法的有效性、优缺点和应用方法。

三维观测系统优化设计的双聚焦方法

双聚焦法是一种面向特定勘探目标的三维观测系统优化设计新方法 ,它可以定量预测地震成像的空间分辨率、振幅精度和 AVP特性。常规的 CMP面元属性分析法是宏观的、全局性的 ,它强调获得最佳的水平叠加效果 ;而双聚焦特性分析法是面向指定目标的、局部性的 ,它强调获得最佳的偏移成像精度。因此 ,将两种方法结合在一起 ,相辅相成 ,提高观测系统优化设计的效果。由于不同介质模型的双聚焦计算方法差异较大 ,因此本课题研究分三步进行 ,即均匀介质算法、层状介质算法、复杂介质算法。本文完成了第一步均匀介质的双聚焦算法研究和软件研制 ,目前可作为三维观测系统优化设计中的补充。