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Evaluating the impact of virtual reality on reducing restrictive practices in psychiatric wards
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作者 Akpoveta Eguono Deborah Uchenna Esther Okpete Haewon Byeon 《World Journal of Psychiatry》 2025年第2期268-273,共6页
This manuscript critically evaluates the randomized controlled trial(RCT)conducted by Phiri et al,which assessed the effectiveness of virtual reality(VR)training for psychiatric staff in reducing restrictive practices... This manuscript critically evaluates the randomized controlled trial(RCT)conducted by Phiri et al,which assessed the effectiveness of virtual reality(VR)training for psychiatric staff in reducing restrictive practices(RPs).Specifically,this RCT investigated the impact of VR on the handling of aggressive patients by psychiatric staff compared to traditional training methods.Despite significant reductions in perceived discrimination in the VR group,there were no major improvements in self-efficacy or anxiety levels.The system usability scale rated the VR platform highly,but it did not consistently outperform traditional training methods.Indeed,the study shows the potential for VR to reduce RPs,although fluctuations in RP rates suggest that external factors,such as staff turnover,influenced the outcomes.This manuscript evaluates the study’s methodology,results,and broader implications for mental health training.Additionally,it highlights the need for more comprehensive research to establish VR as a standard tool for psychiatric staff education,focusing on patient care outcomes and real-world applicability.Finally,this study explores future research di-rections,technological improvements,and the potential impact of policies that could enhance the integration of VR in clinical training. 展开更多
关键词 Virtual reality Restrictive practices Psychiatric wards De-escalation techniques Staff training Generalized anxiety disorder System usability scale Burnout prevention
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基于Ward等值的三绕组变压器并列运行方式实用辨识方法
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作者 李振文 王娟 +3 位作者 颜伟 徐彪 刘力 李龙 《电力系统及其自动化学报》 CSCD 北大核心 2024年第10期151-158,共8页
变压器运行方式直接影响到电网的实时监视和控制。为准确反映电网运行信息,提出一种三绕组变压器并列运行方式的实用辨识方法。基于三绕组变压器并列运行的拓扑结构及其等值电路,结合简单环形网络的潮流分布公式与Ward等值方法,推导出... 变压器运行方式直接影响到电网的实时监视和控制。为准确反映电网运行信息,提出一种三绕组变压器并列运行方式的实用辨识方法。基于三绕组变压器并列运行的拓扑结构及其等值电路,结合简单环形网络的潮流分布公式与Ward等值方法,推导出两台和3台变压器高/中两侧并列运行时的有功功率分配关系。在合理近似的条件下提出变压器并列运行的有功功率分配比例判据,实现变压器并列运行方式的高效辨识。基于典型算例潮流的模拟数据和实际变电站的实测数据,仿真验证所提方法的有效性。 展开更多
关键词 ward等值 三绕组变压器 运行方式 辨识方法
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Tree: Reducing the use of restrictive practices on psychiatric wards through virtual reality immersive technology training 被引量:1
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作者 Peter Phiri Laura Pemberton +8 位作者 Yang Liu Xiaojie Yang Joe Salmon Isabel Boulter Sana Sajid Jackie Clarke Andy McMillan Jian Qing Shi Gayathri Delanerolle 《World Journal of Psychiatry》 SCIE 2024年第10期1521-1537,共17页
BACKGROUND Restrictive practices(RPs)are defined by measures linked to physical and chemical restraints to reduce the movement or control behaviours during any emergency.Seclusion is an equal part of RPs intended to i... BACKGROUND Restrictive practices(RPs)are defined by measures linked to physical and chemical restraints to reduce the movement or control behaviours during any emergency.Seclusion is an equal part of RPs intended to isolate and reduce the sensory stimulation to safeguard the patient and those within the vicinity.Using interventions by way of virtual reality(VR)could assist with reducing the need for RPs as it could help reduce anxiety or agitation by way of placing users into realistic and immersive environments.This could also aid staff to and change current RPs.AIM To assess the feasibility and effectiveness of using a VR platform to provide reduction in RP training.METHODS A randomised controlled feasibility study,accompanied by evaluations at 1 month and 6 months,was conducted within inpatient psychiatric wards at Southern Health National Health Service Foundation Trust,United Kingdom.Virti VR scenarios were used on VR headsets to provide training on reducing RPs in 3 inpatient psychiatric wards.Outcome measures included general self-efficacy scale,generalised anxiety disorder assessment 7(GAD-7),Burnout Assessment Tool 12,the Everyday Discrimination Scale,and the Compassionate Engagement and Action Scale.RESULTS Findings revealed statistically significant differences between the VR and treatment as usual groups,in the Everyday Discrimination Scale items Q8 and Q9:P=0.023 and P=0.040 respectively,indicating higher levels of perceived discrimination in the VR group.There were no significant differences between groups in terms of general self-efficacy,generalised anxiety disorder assessment 9,and Burnout Assessment Tool 12 scores.A significant difference was observed within the VR group for compassionate engagement from others(P=0.005)over time.Most respondents recorded System Usability Scale scores above 70,with an average score of 71.79.There was a significant reduction in rates of RPs in the VR group vs treatment as usual group with a fluctuating variability observed in the VR group likely due to external factors not captured in the study.CONCLUSION Ongoing advancement of VR technology enables the possibility of creating scenarios and simulations tailored to healthcare environments that empower staff by providing more comprehensive and effective training for handling situations. 展开更多
关键词 Virtual reality Restrictive practices Inpatient wards Restraint Isolation Rapid tranquilisation Covert medication Procedural restrictions Health professions training
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Naturalized Decorations for HSCT Ward Environments at Peking University First Hospital
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作者 ZHANG Yifan WANG Xiaobo DENG Huiwen 《Journal of Landscape Research》 2024年第5期59-63,67,共6页
The haematopoietic stem cell transplantation(HSCT)ward serves as a temporary residence for patients following their surgical procedures,necessitating adherence to rigorous aseptic standards.However,the current atmosph... The haematopoietic stem cell transplantation(HSCT)ward serves as a temporary residence for patients following their surgical procedures,necessitating adherence to rigorous aseptic standards.However,the current atmosphere within these wards frequently contributes to feelings of depression among patients.Research indicates that a restorative environment has the potential to alleviate negative emotional states in individuals.This study utilized the HSCT ward of Peking University First Hospital as a case study to examine the decorative preferences.This investigation was conducted through a questionnaire that was informed by the patients’inherent preferences and insights derived from research on restorative environments.The results indicated that the incorporation of floral decorations,particularly those resembling sunflowers,in ward corridors,communal activity areas,and walls can significantly enhance patients’sense of hope.Additionally,it is essential to improve the environmental visual experience in the nurses’lounge and demonstration rooms for medical staff. 展开更多
关键词 Natural decoration ward environment HSCT ward Restorative environment Decoration preference
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Evaluation of the Resuscitation of the Newborn in the Birth Room of the Maternity Ward of the Gynecology-Obstetrics Department of Reference Health Center (RHC) of the District V of Bamako, Mali
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作者 Fatoumata Léonie F. Diakité Guediouma Dembélé +18 位作者 Leyla B. Maiga Hawa Traoré Mariam Kané Soumana Oumar Traoré Niomo Kountao Lala N. Sidibé Adama Dembélé Mady Niakaté Tiaria Sanogo Marianne Djouell Nouhoum L. Traoré Hawa Diall Djeneba Konaté Belco Maiga Karamoko Sacko Abdoul K. Doumbia Souleymane Sagara Abdoul A. Diakité Fatoumata Dicko-Traoré 《Open Journal of Pediatrics》 2024年第6期1126-1138,共13页
Birth is the transition from fetal life to ectopic life. This transition is usually smooth. Only 10% of newborns will need birth assistance. Successful resuscitation is linked to the skills of the health worker. It is... Birth is the transition from fetal life to ectopic life. This transition is usually smooth. Only 10% of newborns will need birth assistance. Successful resuscitation is linked to the skills of the health worker. It is to assess their skills that this work was undertaken with the objective of evaluating the practice of neonatal resuscitation in the delivery room of the RHC maternity hospital in District V of Bamako. Methodology: This was a descriptive cross-sectional study over a four-month period. We included in the study all live newborns who had a gestational age greater than or equal to 32 weeks and who had an Apgar score at the first minute of less than 7. At each birth, we observe the health agent responsible for the care of the newborn by observing the preparation of resuscitation and compliance with the neonatal resuscitation algorithm. We have excluded all newborns who met our inclusion criteria, were reanimated outside of our collection time and had visible or diagnosed anomalies or malformations in the prenatal period, and those whose parents refused to give their consent to participate in the study. Data were collected from the survey sheet and analyzed with the Statistical Package for Social Sciences (SPSS) software version 25. Results: We observed a 24.66% frequency of neonatal resuscitation. Pregnancies were too close in 15% (less than one year). Caesarean section delivery represented 34% of the sample. They were at term in 93% of cases. All newborns were well dried (98.5%), with wet linen change only at 49.5%. Apgar was less than 3 in 7.5% of newborns at first. The resuscitation needs were for the absence of a scream in 78.5% of cases and or heart rate Conclusion: The study evaluated neonatal resuscitation practices at a maternity hospital in Bamako, Mali. It found a 24.66% resuscitation rate, with a 95.5% success rate despite technical limitations. Most steps were correctly applied, though some improvements are needed in areas like preventing hypothermia and equipment preparation. 展开更多
关键词 Evaluation Practice Neonatal Resuscitation Birth Room Maternity ward District V BAMAKO MALI
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Window Views of Wards in Foreign Hospitals
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作者 LI Siyi SHAO Danjin WANG Xiaobo 《Journal of Landscape Research》 2024年第3期37-42,47,共7页
Through the collection and systematic analysis of documents related to window views of hospitals,it is found that natural window views had a significant impact on patients’health benefits.The research focused on thre... Through the collection and systematic analysis of documents related to window views of hospitals,it is found that natural window views had a significant impact on patients’health benefits.The research focused on three aspects:“shortening length of stay”,“pain reduction”and“improvement of recovery rate”,mainly covering three types of patients:“heart patients”,“postoperative patients”and“patients of rehabilitation centers”.Based on the above analysis,summary and sorting,new directions and perspectives of hospital environment design and research under the concept of comprehensive health of people’s physiological,psychological and social adaptation will be obtained to provide references for the research and practice of health architecture,rehabilitation architecture,biophile design and other fields. 展开更多
关键词 Window views wards Research review Medical buildings Natural environment
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Diminishing restrictive practices in psychiatric wards via virtual reality training:Old wine in a new bottle?
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作者 Yan Zeng Jun-Wen Zhang Jian Yang 《World Journal of Psychiatry》 SCIE 2024年第12期1783-1787,共5页
This editorial examines the application of virtual reality(VR)training to mitigate restrictive practices(RPs)within psychiatric facilities.RPs include physical restraints,seclusion,and chemical restraints,used to ensu... This editorial examines the application of virtual reality(VR)training to mitigate restrictive practices(RPs)within psychiatric facilities.RPs include physical restraints,seclusion,and chemical restraints,used to ensure patient safety but with varying usage rates across regions.In recent years,there has been a growing focus on the adverse effects of RPs on both healthcare workers and patients,leading to calls for its reduction.Previous research has shown the efficiency of VR training in RP reduction.This editorial will analyze the limitations of VR training in prior research aimed at reducing RP,emphasizing that the essence of RPs is a medical safety issue,calling for careful differentiation of the causes of RPs,and avoiding the use of AR technology as a"new bottle"for"old wine"to improve the quality and reproducibility of future research in this field. 展开更多
关键词 Virtual reality Virtual reality training Restrictive practices Questions INPATIENT Psychiatric wards
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Research on the Application Effect of Humanized Nursing Management in Pediatric Rehabilitation Wards
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作者 Yan Sun 《Journal of Clinical and Nursing Research》 2024年第7期54-59,共6页
Objective:To explore the application effect of humanized nursing management in pediatric rehabilitation wards.Methods:82 pediatric patients admitted to our hospital between January 2023 and January 2024 were randomly ... Objective:To explore the application effect of humanized nursing management in pediatric rehabilitation wards.Methods:82 pediatric patients admitted to our hospital between January 2023 and January 2024 were randomly divided into a control group and an observation group.Among them,the control group was given routine care,while the observation group received humanized nursing management,and the clinical nursing effects and situations of the two groups of children were compared and analyzed.Results:After nursing,the observation group showed significantly better performance in intelligent Developmental Quotient(DQ)values(P<0.05).The clinical nursing satisfaction of the observation group was significantly better than that of the control group(χ^(2)=11.710,P<0.05).Conclusion:Humanized nursing management for patients in pediatric rehabilitation wards not only improves their recovery but also significantly enhances parental satisfaction,which is worth learning from and promoting in clinical settings. 展开更多
关键词 Humanized nursing CHILDREN Rehabilitation ward Application effect
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Application and Research of Big Data Technology in Intelligent Ward
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作者 Yuhan Li Tongxing Li Shenglei Dongye 《Journal of Clinical and Nursing Research》 2024年第10期30-35,共6页
With the rapid development of information science and technology and the progress of the health service industry,the integration of medical services and new technologies such as big data technology has become more in-... With the rapid development of information science and technology and the progress of the health service industry,the integration of medical services and new technologies such as big data technology has become more in-depth,and the construction of smart hospitals and smart wards has received more and more attention and application.This article conducts in-depth research and analysis on the application and exploration of big data technology in smart wards and explores the role of big data technology in improving the quality,efficiency,and cost of medical services in smart wards,as well as the application prospects and challenges of big data technology in patient monitoring,disease prevention,and diagnosis and treatment processes in smart wards.The focus is on analyzing and studying the use of big data technology to assist in the construction of smart neonatal surgery wards.This article aims to provide useful references and lessons for the construction and development of smart wards. 展开更多
关键词 Smart ward Neonatal surgery Big data technology Medical service quality
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干部病房空巢老年人生活质量的动态变化情况及影响因素
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作者 丁超 曲光瑾 《国际老年医学杂志》 2025年第1期31-35,共5页
目的探究干部病房空巢老年人生活质量的动态变化情况及相关影响因素。方法回顾性分析哈尔滨医科大学附属第一医院干部病房2020年3月—2021年6月收治的年龄≥60岁的116例空巢老年人的临床资料。采用世界卫生组织生活质量测定简表对其生... 目的探究干部病房空巢老年人生活质量的动态变化情况及相关影响因素。方法回顾性分析哈尔滨医科大学附属第一医院干部病房2020年3月—2021年6月收治的年龄≥60岁的116例空巢老年人的临床资料。采用世界卫生组织生活质量测定简表对其生活质量进行评估,对比初次调查及两年后末次随访的评分;先后采用单因素及多元线性回归分析影响其生活质量的高危因素。结果随访两年后患者的心理领域和社会关系领域生活质量评分降低(P<0.05),生理领域及环境领域的差异无统计学意义(P>0.05)。单因素分析显示:不同月收入、睡眠状况、自理能力、慢性病史、家庭关系及子女是否孝顺的老年人心理领域及社会关系领域比较,差异均有统计学意义(P<0.05)。多元线性回归分析显示:影响心理领域的高危因素包括月收入、睡眠状况、自理能力、慢性病史及子女是否孝顺(P<0.05);影响社会关系领域的高危因素包括月收入、睡眠状况及慢性病史(P<0.05)。结论干部病房空巢老年人的生活质量主要发生在心理领域以及社会关系领域的降低,其中月收入、睡眠状况、自理能力、慢性病史以及子女孝顺对这两个领域影响应加以重视。 展开更多
关键词 干部病房 空巢老人 生活质量 动态变化 影响因素
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基于Ward系统聚类的中国农用地整治实施状况分析 被引量:37
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作者 项晓敏 金晓斌 +2 位作者 杜心栋 孙伟 周寅康 《农业工程学报》 EI CAS CSCD 北大核心 2015年第6期257-265,共9页
为科学分析当前中国农用地整治的实施特征和空间格局特点,厘清实施状态与规划目标的协调状态,该文基于土地整治项目管理信息,以县域为研究单元,通过整治强度、整治潜力和整治难度3项指标,采用Ward系统聚类法,对2006-2012年中国农用地整... 为科学分析当前中国农用地整治的实施特征和空间格局特点,厘清实施状态与规划目标的协调状态,该文基于土地整治项目管理信息,以县域为研究单元,通过整治强度、整治潜力和整治难度3项指标,采用Ward系统聚类法,对2006-2012年中国农用地整治实施状况进行综合分区,并结合既定的规划目标,对实施状态进行了定量分析,得出以下结论:1)高整治强度区主要位于华北平原、三江平原、长江三角洲等传统农区;高整治潜力区主要位于青甘农牧区、黄土高原区等半湿润半干旱地区;高整治难度区主要位于秦巴山地和云贵高原等地形较为复杂的地区。2)研究期内中国农用地整治实施状态可划分为"中高-低-中"(Ⅰ类)、"中-中低-中"(Ⅱ类)、"中高-中高-中高"(Ⅲ类)、"低-中-高"(Ⅳ类)和"高-中低-中"(Ⅴ类)等5种类型,其中以Ⅲ类最为集中,Ⅰ类和Ⅱ类次之,Ⅳ类、Ⅴ类数量较少且分布零散。3)从实施状态与整治规划的协调性看,实施现状与规划确定的农用地整治重点区域、高标准基本农田建设示范县,以及基本农田整治重大工程等重点任务,均存在一定偏差;从与表征经济发展、粮食生产、土地整治活动的分区对比来看,区域差异不甚明显,整治重点尚不突出。该研究成果可为中国土地整治规划评价和宏观制度设计提供参考。 展开更多
关键词 土地利用 整治 规划 农用地 实施状态 协调性 ward系统聚类
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基于BP模型和Ward法的北京市平谷区乡村地域功能评价与分区 被引量:51
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作者 唐林楠 刘玉 +1 位作者 潘瑜春 任艳敏 《地理科学》 CSCD 北大核心 2016年第10期1514-1521,共8页
构建乡村地域功能评价指标体系,借助BP神经网络模型揭示平谷区"生产-生活-生态"功能分异特征;运用Ward法划分功能区,服务于平谷区乡村转型发展和功能区布局。结果表明:1在多项功能综合作用下,平谷区基本形成了"平原地区... 构建乡村地域功能评价指标体系,借助BP神经网络模型揭示平谷区"生产-生活-生态"功能分异特征;运用Ward法划分功能区,服务于平谷区乡村转型发展和功能区布局。结果表明:1在多项功能综合作用下,平谷区基本形成了"平原地区生产功能较强、镇中心及周边村域生活功能明显、山地区以生态功能为主"的功能分布格局。2基于评价结果和空间属性,平谷区划分为西部平原生产区、东部山地生态生产区、中部平原城市生活区、中部近郊平原生活区、东部丘陵生态生活区和北部山地生态区。其中,西部平原生产区、中部平原城市生活区、北部山地生态区是平谷三生空间功能发展的优势区域,分布相对集中。按照"强功能重优化、中等功能重提升、弱功能重改善"的原则提升乡村地域功能,促进地区均衡发展。 展开更多
关键词 乡村地域功能 评价 BP模型 ward 平谷区
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Ward三角区再研究 被引量:8
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作者 孙蕴 贺丽英 +3 位作者 马兆坤 潘克梫 李英亭 要文娟 《中国骨质疏松杂志》 CAS CSCD 北大核心 2016年第6期706-710,717,共6页
目的深入研究Ward三角区骨密度的临床意义。方法采用美国Norland XR-600双能X线骨密度仪,通过测定1189例病人的左股骨近端骨密度,评估计算机自动生成的Ward三角区的特点;通过测定30例志愿者左右股骨近端骨密度,评估不同肢体侧别的骨密... 目的深入研究Ward三角区骨密度的临床意义。方法采用美国Norland XR-600双能X线骨密度仪,通过测定1189例病人的左股骨近端骨密度,评估计算机自动生成的Ward三角区的特点;通过测定30例志愿者左右股骨近端骨密度,评估不同肢体侧别的骨密度是否存在差异;通过对72例随访病人3~6月内进行左股骨近端骨密度测定,观察Ward三角区骨密度在较短时间内随时间的变化规律及临床特点。结果 1Ward三角区由计算机根据骨密度最低值自动搜索形成,大部分受试者(86.7%)Ward三角区位于股骨颈底边附近,少部分受试者(5.2%)位于股骨颈外,以大粗隆最为常见,与解剖位置不完全对应;2部分受试者(8.7%)Ward三角区骨密度并非股骨上段最低值,最低值出现在大粗隆。3计算机自动生成的Ward三角区小方块前后两次位置无明显变化。4Ward三角区骨密度值的精确度误差(2.27%)大于股骨颈(1.05%)及大粗隆(1.57%)。5正常人双髋骨密度无显著性差异(P=0.32,P〉0.05)。672例随访患者Ward三角区的骨密度(BMD)变化先于股骨颈及正位腰椎出现。结论髋关节采用标准体位摆放,Ward三角区位置较为固定,可用于临床随访。 展开更多
关键词 骨密度 ward三角区
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基于ward等值的分布式潮流计算 被引量:19
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作者 颜伟 何宁 《重庆大学学报(自然科学版)》 EI CAS CSCD 北大核心 2006年第11期36-40,共5页
为了解决数据资源广域分布一体化潮流仿真分析问题,提出了一种基于ward等值的分布式潮流算法.该算法采用主从分区原理,将互联系统中的各子区域划分为主区域和从区域,并确定联络节点在不同区域的节点类型,使用ward等值原理,求出各分区边... 为了解决数据资源广域分布一体化潮流仿真分析问题,提出了一种基于ward等值的分布式潮流算法.该算法采用主从分区原理,将互联系统中的各子区域划分为主区域和从区域,并确定联络节点在不同区域的节点类型,使用ward等值原理,求出各分区边界节点的等值注入功率和阻抗的基础上,由主区域到各相邻从区域,依次采用牛顿法进行区域潮流计算,由此修正边界节点的电压和等值注入功率.如此反复迭代,直到一体化潮流收敛.该算法充分利用了ward等值对相邻区域的功率、电压和结构信息的全面反映,使一体化潮流计算具有更好的收敛性与收敛精度.通过IEEE30节点和实际系统181节点的仿真计算,验证了该方法在收敛性和收敛精度方面具有明显优势. 展开更多
关键词 ward等值 分布式潮流计算 牛顿法
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基于离差最大化和Ward系统聚类的四川城镇化水平研究 被引量:16
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作者 霍叶青 何跃 《软科学》 CSSCI 北大核心 2010年第6期71-73,84,共4页
对2007年四川城镇化发展水平进行了实证分析,先是采用离差最大化方法求出四川省各地区城镇化的综合评价值和排名,然后采用Ward系统聚类的方法对四川省各地区城镇化发展水平进行分类评价。实证结果得出了四川各地区在城镇化发展中所处的... 对2007年四川城镇化发展水平进行了实证分析,先是采用离差最大化方法求出四川省各地区城镇化的综合评价值和排名,然后采用Ward系统聚类的方法对四川省各地区城镇化发展水平进行分类评价。实证结果得出了四川各地区在城镇化发展中所处的地位,以及各地区的比较优势和不足,结论具有一定的参考价值,可为四川省各地区加快城镇化发展提供依据。 展开更多
关键词 离差最大化法 ward系统聚类法 四川省 城镇化
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基于Ward等值的多区域无功优化分解协调算法 被引量:26
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作者 刘志文 刘明波 《电力系统自动化》 EI CSCD 北大核心 2010年第14期63-69,共7页
针对多区域电力系统的无功优化问题,提出了基于Ward等值的分解协调算法。将所有子区域分为主区域和从区域,并确定边界节点在不同区域中的节点类型和区域间相角传递方法。在基态条件下,根据潮流计算结果确定边界节点等值注入功率初值。... 针对多区域电力系统的无功优化问题,提出了基于Ward等值的分解协调算法。将所有子区域分为主区域和从区域,并确定边界节点在不同区域中的节点类型和区域间相角传递方法。在基态条件下,根据潮流计算结果确定边界节点等值注入功率初值。采用矩阵求逆辅助定理,提高优化过程中外部网络变压器变比变化引起的等值导纳矩阵计算效率问题,且大幅度提高了外部网络等值精度。引入适合无功优化算法的外部协调策略,以较少的协调通信量获得较好的协调效果。以IEEE39节点和538节点实际系统为例,通过与集中优化方法进行比较,验证了该方法的有效性。 展开更多
关键词 多区域电力系统 无功优化 ward等值 矩阵求逆辅助定理 分解协调
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超对称双圈图的Ward恒等式 被引量:2
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作者 赵树民 张印杰 +5 位作者 郭涛 李霞 曹晓兵 王芳 赵蔚 庞学霞 《河北大学学报(自然科学版)》 CAS 北大核心 2007年第3期253-256,共4页
在超对称模型下,把μ→μ+γ过程的双圈图分成2大类型.类型一:只包含三粒子相互作用顶点的图;类型二:含有四粒子相互作用顶点的图.分别证明了这2种类型的图都满足Ward(瓦德)恒等式,从而保证了所写费曼图的完整性和正确性.
关键词 ward恒等式 超对称 双圈图
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基于Ward聚类法的道路交通事故多元统计分析 被引量:9
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作者 吴彪 许洪国 张文会 《黑龙江工程学院学报》 CAS 2009年第3期4-6,共3页
道路交通事故具有空间分布规律,不同地区有所差异。在选取道路交通事故统计指标的基础上,基于系统聚类分析的基本原理,采用Ward最小方差平方和法对某地区道路交通安全状况进行聚类分析。通过分类,将具有共性的地区划归为一类。结果表明... 道路交通事故具有空间分布规律,不同地区有所差异。在选取道路交通事故统计指标的基础上,基于系统聚类分析的基本原理,采用Ward最小方差平方和法对某地区道路交通安全状况进行聚类分析。通过分类,将具有共性的地区划归为一类。结果表明,类别的划分突出特性,反映道路交通事故具有空间分布特征,有助于掌握道路交通安全状况,便于采取相应的防治措施。 展开更多
关键词 道路交通事故 多元统计 聚类分析 ward
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基于Ward’s方法的k-平均优化算法及其应用 被引量:7
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作者 邱苏林 王丽珍 《计算机工程与应用》 CSCD 北大核心 2008年第31期169-172,共4页
通过对k-平均算法存在不足的分析,提出了一种基于Ward’s方法的k-平均优化算法。算法首先在用Ward’s方法对样本数据初步聚类的基础上,确定合适的簇数目、初始聚类中心等k-平均算法的初始参数,并进行孤立点检测、删除;基于上述处理再采... 通过对k-平均算法存在不足的分析,提出了一种基于Ward’s方法的k-平均优化算法。算法首先在用Ward’s方法对样本数据初步聚类的基础上,确定合适的簇数目、初始聚类中心等k-平均算法的初始参数,并进行孤立点检测、删除;基于上述处理再采用传统k-平均算法进行聚类。将优化的k-平均算法应用到罪犯人格类型分析中,实验结果表明,该算法的效率、聚类效果均明显优于传统k-平均算法。 展开更多
关键词 K-平均算法 ward’s方法 簇数目 初始聚类中心 孤立点检测
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基于Ward/REI等值理论的配网合环稳态电流计算 被引量:9
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作者 宣科 贾云清 祝洪博 《东北电力大学学报》 2011年第1期43-47,共5页
针对配网合环系统进行计算时,无法获取上级电网实时信息,需要对外部网络进行适当等值的问题,提出一种基于Ward/REI等值理论建立合环网络的等值模型,利用Ward型等值法具有良好数值解的特点,对外网进行Ward等值。在实时情况下,当系统的运... 针对配网合环系统进行计算时,无法获取上级电网实时信息,需要对外部网络进行适当等值的问题,提出一种基于Ward/REI等值理论建立合环网络的等值模型,利用Ward型等值法具有良好数值解的特点,对外网进行Ward等值。在实时情况下,当系统的运行参数发生变化后,在边界节点处将会出现失配功率,以边界节点失配功率,增广一个校正REI网络来修正等值参数,使等值网满足在线分析对等值网准确度的需要。实际算例结果表明了该方法的有效性与实用性,对实际配网的调度运行提供了理论依据和技术支撑。 展开更多
关键词 配电网 合环操作 ward/REI等值 潮流计算 稳态电流
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