Observation points classifier ensemble for high-dimensional imbalanced classification

In this paper,an Observation Points Classifier Ensemble(OPCE)algorithm is proposed to deal with High-Dimensional Imbalanced Classification(HDIC)problems based on data processed using the Multi-Dimensional Scaling(MDS)feature extraction technique.First,dimensionality of the original imbalanced data is reduced using MDS so that distances between any two different samples are preserved as well as possible.Second,a novel OPCE algorithm is applied to classify imbalanced samples by placing optimised observation points in a low-dimensional data space.Third,optimization of the observation point mappings is carried out to obtain a reliable assessment of the unknown samples.Exhaustive experiments have been conducted to evaluate the feasibility,rationality,and effectiveness of the proposed OPCE algorithm using seven benchmark HDIC data sets.Experimental results show that(1)the OPCE algorithm can be trained faster on low-dimensional imbalanced data than on high-dimensional data;(2)the OPCE algorithm can correctly identify samples as the number of optimised observation points is increased;and(3)statistical analysis reveals that OPCE yields better HDIC performances on the selected data sets in comparison with eight other HDIC algorithms.This demonstrates that OPCE is a viable algorithm to deal with HDIC problems.

Heteroclinic and Homoclinic Connections between the Sun-Earth Triangular Points and Quasi-Satellite Orbits for Solar Observations

Investigation of new orbit geometries exhibits a very attractive behavior for a spacecraft to monitor space weather coming from the Sun. Several orbit transfer mechanisms are analyzed as potential alternatives to monitor solar activity such as a sub-solar orbit or quasi-satellite orbit and short and long heteroclinic and homoclinic connections between the triangular points L4 and L5 and the collinear point L3 of the CRTBP （circular restricted three-body problem） in the Sun-Earth system. These trajectories could serve as channels through where material can be transported from L5 to L3 by performing small maneuvers at the departure of the Trojan orbit. The size of these maneuvers at L5 is between 299 m/s and 730 m/s depending on the transfer time of the trajectory and does not need any deterministic maneuvers at L3. Our results suggest that material may also be transported from the Trojan orbits to quasi-satellite orbits or even displaced quasi-satellite orbits.

羽毛球11分制与21分制的比较与分析

羽毛球作为一项历史悠久的运动,其计分制度的变化显著影响了比赛策略、运动员表现和观众体验。通过文献资料法和数理统计法,对两种计分制下的比赛特点、运动员表现及比赛用时进行了细致对比。研究结果显示,11分制比赛具有更快的节奏和更高的不确定性,不仅能有效控制比赛时间,还有助于降低运动员的受伤风险,同时增加比赛的激烈程度和观赏性,满足现代观众对快节奏和高悬念比赛的需求。这些变化对适应现代体育娱乐的需求至关重要,有助于提升羽毛球作为全球竞技体育的竞争力和影响力。

Clinical Observation on Brachial Plexus Block with “One Injection Two Points” Method Guiding by Ultrasound

OBJECTIVE: To compare the clinical effect of brachial plexus block with "One Injection Two Points" guided under ultrasound and the conventional method guiding by ultrasound. METHODS: 70 patients were randomized evenly into 2 groups, with 35 patients in each group, while the Experiment Group(Group B) received One Injection Two Points" method, the Control Group(Group A) received the conventional method.The nerve block every 5 s, the success rate of anesthesia, the dosage of local anesthetics, second remedial anesthesia, adverse reactions, etc.were recorded. RESULTS: Group B was superior to group A in the success rate of anesthesia; There were 6 patients in group A who required constant pump injection of Remifentanil to remedy, while no patients in Group B needed remedy treatment. There were no serious adverse reactions in both groups.CONCLUSIONS: The clinical effect of brachial plexus block with "One Injection Two Points" method guided under ultrasoundguiding by ultrasound was superior to that of the conventional method.

A Statistical Comparison Method of the Differences among Single Points for Linear Dynamic Experimental Data

The experimental random error and desired valuse of non observed points in dynamic indexes were estimated by establishing the linear regression equations about variety regulations of dynamic indexes.The methods for difference significant test among different treatments using dynamic point as indexes were presented without setting the replication on each dynamic point observed.

Clinical Observation on Chronic Pelvic inflammation Treated by Big Needle on Xiazhipian Point

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Clinical observation of electroacupuncture"Tongmin Point"combined with heat-sensitive moxibustion on knee osteoarthritis and its influence on blood lipid level and ADAMTS-4

Objective:To observe the clinical effect of electroacupuncture"Tongmin point"combined with heat-sensitive moxibustion on knee osteoarthritis and its effect on blood lipid level,polyprotein polysaccharide enzyme-4(a disintegrin and metalloprotease with thrombospondin motifs,ADAMTS-4,matrix metalloproteinase-3(matrix metalloproteinase-3,);and MMPs-3)Impact.Methods:80 patients were randomly divided into two groups,40 cases per group,Treatment and control groups,The treatment group was given electroacupuncture combined with heat-sensitive moxibustion,Six times a week,Continuous treatment for 4 weeks;The control group was given intraarticular sodium hyaluronate,Once a week,continuous treatment for 4 weeks.Results:During the treatment period,Visual analogue scale visual analogue scale,VAS)show a downward trend,Intra-group comparisons,Differences were statistically significant(P<0.05);After 2 weeks of treatment,4 weeks of treatment and 2 weeks of follow-up,All the scores in the treatment group were lower than those in the control group(P<0.05).After treatment in two groups(The Western Ontario and Mc Master Universities Osteoarthritis Index,)of osteoarthritis index,University of Western Ontario WOMAC)The scores of each item decreased significantly,treatment group was better than the control group(P<0.05).After four weeks of treatment,(Total cholesterol,)Total cholesterol TC,triglycerides(Triglyceride,);and TG,LDL(Low density lipoprotein,);and LDL-C)A decrease in content,High density lipoprotein High density lipoprotein,HDL-C)Increased content,and the improvement was better than that of the control group(P<0.05).After treatment,the ADAMTS-4,MMPs-3 content decreased,Intergroup comparisons,Differences were statistically significant(P<0.05);The effective rate in the treatment group was 87.5%,The control rate was 60%,treatment group was more effective(P<0.05).Conclusions:Electroacupuncture"Tongmin point"combined with heat-sensitive moxibustion can obviously improve the symptoms of knee osteoarthritis patients,Regulate blood lipids,High security,It is worth popularizing in clinic.

Clinical Observation on 100 Cases of Postoperative Pain of Anal-Intestinal Diseases Treated with Vitamine K Blocking at Changqiang Point

Since the latter half of 1996, we have used vitamine K blocking at Changqiang (GV 1) for relieving the postoperative pain of anal fissure with satisfactory results. A report follows.……

Clinical Observation on Intractable Insomnia Treated by Point Pressure in 42 Cases

The author have in recent years treated 42 cases of intractable insomnia (with a history of over 2 years) by point pressure, yielding quite satisfactory results when compared with those treated with clonazepam. This is reported as follows.……

Clinical Study on Suanzaoren Decoction (酸枣仁汤) Combined with Auricular Points Pressing Beans in Treating Insomnia

Objective:To study the curative effect of oral Suanzaoren Decoction(酸枣仁汤)combined with pressing beans at auricular points on insomnia.Methods:80 patients with insomnia were randomly divided into observation group and control group with 40 cases in each group.The control group was treated by auricular points pressing beans therapy,while the observation group was treated with oral Suanzaoren Decoction combined with auricular points pressing beans therapy.Adjust auricular points pressing beans and decoction once a week,4 times as a course of treatment,totaling 2 courses of treatment.The time of falling asleep,the time of sleeping and the number of awakening before and after treatment were compared in the two groups,and the total effective rate of sleep quality between the two groups was compared.Results:After treatment,the quality of sleep in both groups was better than that before treatment(P<0.05 or P<0.01),and the total effective rate of grade I sleep quality in the observation group was higher than that in the control group(P<0.01).Conclusion:Oral Suanzaoren Decoction combined with pressing beans at auricular points has a significant effect on insomnia,which is superior to pressing beans at auricular points alone.

Enhanced Perturb and Observe Control Algorithm for a Standalone Domestic Renewable Energy System

The generation of electricity,considering environmental and eco-nomic factors is one of the most important challenges of recent years.In this article,a thermoelectric generator(TEG)is proposed to use the thermal energy of an electric water heater(EWH)to generate electricity independently.To improve the energy conversion efficiency of the TEG,a fuzzy logic con-troller(FLC)-based perturb&observe(P&O)type maximum power point tracking(MPPT)control algorithm is used in this study.An EWH is one of the major electricity consuming household appliances which causes a higher electricity price for consumers.Also,a significant amount of thermal energy generated by EWH is wasted every day,especially during the winter season.In recent years,TEGs have been widely developed to convert surplus or unused thermal energy into usable electricity.In this context,the proposed model is designed to use the thermal energy stored in the EWH to generate electricity.In addition,the generated electricity can be easily stored in a battery storage system to supply electricity to various household appliances with low-power-consumption.The proposed MPPT control algorithm helps the system to quickly reach the optimal point corresponding to the maximum power output and maintains the system operating point at the maximum power output level.To validate the usefulness of the proposed scheme,a study model was developed in the MATLAB Simulink environment and its performance was investigated by simulation under steady state and transient conditions.The results of the study confirmed that the system is capable of generating adequate power from the available thermal energy of EWH.It was also found that the output power and efficiency of the system can be improved by maintaining a higher temperature difference at the input terminals of the TEG.Moreover,the real-time temperature data of Abha city in Saudi Arabia is considered to analyze the feasibility of the proposed system for practical implementation.

局部阴影下基于GWO-P&O混合算法的光伏最大功率点跟踪

针对局部遮阴环境下传统灰狼优化(Gray wolf optimization,GWO)算法在跟踪最大功率点时P-U特性曲线出现多峰值、后期收敛速度慢、稳态精度低等问题,结合灰狼优化算法和扰动观察法(Perturbation and observation,P&O)各自的优势,提出了基于GWO-P&O的混合优化最大功率点跟踪(Maximum power point tracking,MPPT)算法。首先,采用灰狼优化算法逐渐向光伏的全局最大功率点靠近。其次,在灰狼优化算法收敛后期引入P&O法,既保持了灰狼优化算法较高的稳态精度,又能以较快速度寻找到局部最大功率点。最后,在不同环境工况下,将所提出的GWO-P&O方法与传统GWO算法进行对比。结果表明,改进的GWO-P&O算法在保证良好稳态性能的同时,一定程度上提高了GWO算法后期跟踪最大功率时的收敛速度。

五行针灸联合耳穴压丸治疗卒中后抑郁症临床研究

目的:观察五行针灸联合耳穴压丸治疗卒中后抑郁症的效果。方法:80例以随机数字表法分为对照组和研究组各40例,对照组给予常规针灸治疗、研究组用五行针灸联合耳穴压丸治疗。结果:治疗后研究组HADS-A、HADS-D低于对照组(P<0.05)。治疗后研究组Cor水平低于对照组(P<0.05)而神经肽Y水平高于对照组(P<0.05)。治疗后研究NIHSS低于对照组(P<0.05)而Brathel指数高于对照组(P<0.05)。结论:五行针灸配合耳穴压丸治疗卒中后抑郁症可有效缓解焦虑、抑郁情绪,增强信心,改善神经功能缺损,促进日常生活能力提高。

基于蝗虫优化PID控制的光伏MPPT技术

光伏系统中最大功率点追踪(MPPT)由于受负载的随机性、太阳辐射的间歇以及环境温度的影响而变得复杂。针对这一问题,提出了一种基于MPPT技术的蝗虫优化PID控制(GO-PID)方法。在提出的MPPT中,蝗虫优化被用来调整PID控制的给定信号前馈分量,以处理由可变的光照和温度引起的所有不确定性,并研究了基于蝗虫优化PID的MPPT技术在快速变化的光照和温度下的性能。该算法克服了扰动&观测(P&O)传统技术最大功率点跟踪方法收敛速度慢、稳态振荡、跟踪效率低等缺点。通过仿真实验与P&O算法进行了比较,验证了该最大功率点跟踪算法的有效性和可行性。

JH油田含蜡原油析蜡温度测试与分析

采用显微镜观察法、黏温曲线法、DSC法分别测试了JH油田六个不同区块的原油析蜡温度。在DSC法中,测定了降温速率5、10℃/min下的析蜡点。在黏温曲线法中,测定了剪切速率10、20、50、100 s^(-1)下的析蜡点。在显微镜观察法中,测定了降温速率0.5、5℃/min下的析蜡点。实验结果表明,不同方法测量的析蜡点有所差异,一方面与不同测试方法的原理有关,另一方面与仪器的分辨率、操作者的经验有关。若原油中的活性物质和大分子不溶物影响较大时,也会表现不同。

磁共振成像检查中关键失效点溯源预控干预后睡眠质量的观察

目的:分析磁共振成像(MRI)检查中关键失效点溯源预控干预睡眠质量及疲劳度的影响。方法:选取2021年6月至2023年6月福建医科大学附属泉州第一医院收治的MRI检查患者84例作为研究对象,按照随机数字表法随机分为对照组和观察组,每组42例。对照组开展常规护理,观察组开展关键失效点溯源预控干预。比较2组的睡眠质量、睡眠参数、疲劳度及心理应激。结果:在催眠药物、睡眠障碍、睡眠效率及日间功能障碍评分上,观察组低于对照组(P<0.05)。观察组较于对照组,其睡眠潜伏期、觉醒次数更低,总睡眠时间更长(P<0.05)。在疲劳严重程度量表(FSS)评分、汉密尔顿焦虑量表(HAMA)评分及汉密尔顿抑郁量表(HAMD)评分方面,观察组均低于对照组(P<0.05)。结论:关键失效点溯源预控干预有利于改善MRI检查患者的睡眠质量及睡眠参数,减轻疲劳度和心理应激反应,临床可进一步推广应用。

一种BOOST电路的光伏控制器系统的设计与实现

本文介绍了一种基于BOOST电路的光伏控制器系统设计,该系统核心算法采用扰动观察法,以实现光伏系统的实时监控和最大功率点跟踪(MPPT)。该设计注重提高系统的测量精度和响应速度,同时保证操作的简便性。通过精确的测量和快速响应,该系统能够有效优化光伏发电的性能,确保光伏电池在不同环境条件下都能维持最佳工作状态。整体来看,该光伏控制器系统在提高光伏能量转换效率、操作稳定性和用户体验方面具有显著优势,为光伏发电系统的应用提供了有效的技术支持。

电针颈夹脊穴治疗急性期神经根型颈椎病的临床观察

【目的】观察电针颈夹脊穴治疗急性期神经根型颈椎病的临床疗效。【方法】将124例急性期神经根型颈椎病患者随机分为对照组和观察组,每组各62例。对照组给予西药常规治疗。观察组在对照组治疗的基础上,给予电针颈夹脊穴治疗。连续治疗6周。治疗6周后,评价2组临床疗效,观察2组患者治疗前后颈椎生理曲度C2~7Cobb角的变化情况,以及麦吉尔疼痛问卷简表(SF-MPQ)评分、血清疼痛因子P物质(SP)、前列腺素E2(PGE2)水平的变化情况。比较2组患者治疗前后白细胞介素(IL)-6、IL-1β、肿瘤坏死因子α(TNF-α)、核因子-κB(NF-κB)水平的变化情况。并进行随访,统计复发率。【结果】(1)治疗后,2组患者颈椎生理曲度C2~7Cobb角均明显改善(P<0.05),且观察组在改善颈椎生理曲度C2~7Cobb角方面明显优于对照组,差异有统计学意义(P<0.05)。(2)治疗后,2组患者的颈椎疼痛SF-MPQ评分、SP、PGE2水平均明显改善(P<0.05),且观察组在改善颈椎疼痛SF-MPQ评分、SP、PGE2水平方面明显优于对照组,差异有统计学意义(P<0.05)。(3)治疗后,2组患者的IL-6、IL-1β、TNF-α、NF-κB水平明显改善(P<0.05),且观察组在改善IL-6、IL-1β、TNF-α、NF-κB水平方面明显优于对照组,差异有统计学意义(P<0.05)。(4)观察组总有效率为95.16%(59/62),对照组为80.65%(50/62)。观察组疗效优于对照组,差异有统计学意义(P<0.05)。(5)观察组患者症状复发率为5.71%(2/35),对照组为29.63%(8/27)。观察组患者症状复发率低于对照组,差异有统计学意义(P<0.05)。【结论】电针颈夹脊穴治疗急性期神经根型颈椎病,可显著缓解患者的疼痛症状,改变异常颈椎生理曲度,并减轻炎症反应,降低症状复发风险,疗效显著。

电磁悬浮系统的改进线性自抗扰控制方法

单点电磁悬浮系统是常导电磁磁浮列车悬浮系统的关键控制单元。针对单点电磁悬浮系统因强干扰影响导致控制性能下降的问题,提出了一种改进型线性自抗扰控制(LADRC)方法。首先,基于电磁悬浮结构及原理建立了单点悬浮系统线性化模型,并对系统稳定性进行了分析。其次,基于自抗扰控制方法设计位置外环控制器以及基于PI调节器的电流内环控制器,对线性扩张状态观测器进行改进,设计两级级联的线性扩张状态观测器提高扰动估计精确度及速度,进而提高LADRC中扩张状态观测器对系统扰动的估计能力,并在频域上分析了改进型LADRC扰动估计性能和抑制能力的优越性。最后,搭建实验环境,对改进线性自抗扰控制方法的有效性进行验证。实验结果表明,所提的改进型LADRC不仅具有良好的位置跟踪性能,同时相比传统LADRC具有更强的抗扰动能力。

基于烟圈效应的11点超前探观测系统设计

矿井瞬变电磁法因关断时间影响存在一定探测盲区,一定条件下关断时间长短取决于发射回线边长、等效面积。针对掘进巷道迎头有限空间,设计采用多匝、重叠小边长回线以满足探测深度需要。研究计算表明,40匝、2 m×2 m的发射回线盲区范围为20 m左右,并据此首次提出了矿井瞬变电磁法测点间距选择盲区理论法。基于"烟圈效应"设计了适用于不同巷道条件下的"11点法"矿井瞬变电磁超前探观测系统。该系统随煤/岩层倾角变化而变化。通过推理计算得到了与煤/岩层倾角相关的线框布设角度公式,使该系统更具实际应用价值和指导意义。