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Robust Interval State Estimation for Distribution Systems Considering Pseudo-measurement Interval Prediction

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Journal of Modern Power Systems and Clean Energy 2024年第1期12卷 179-188页

作者： xu Zhang Wei yan Meiqing Huo hui Li the School of Electrical Engineering Chongqing UniversityChongqing 400044China

Interval state estimation(ISE)can estimate state intervals of power systems according to confidence intervals of predicted pseudo-measurements,thereby analyzing the impact of uncertain pseudo-measurements on ***,predicted pseudo-measurements have prediction errors,and their confidence intervals do not necessarily contain the truth values,leading to estimation biases of the *** solve this problem,this paper proposes a pseudo-measurement interval prediction framework based on the Gaussian process regression(GPR)model,thereby improving the prediction accuracy of pseudo-measurement confidence ***,a weight assignment strategy for improving the robustness of weighted least squares(WLS)ISE is *** strategy quantifies the deviation between the pseudo-measurement intervals and their estimated intervals and assigns smaller weights to the pseudo-measurement intervals with larger deviations,thereby improving the estimation accuracy and robustness of the *** paper adopts the data from the supervisory control and data acquisition(SCADA)system of the New York Independent System Operator(NYISO).It verifies the advantages of the GPR method for pseudo-measurement interval prediction by comparing it with the quantile regression and neural network *** addition,this paper demonstrates the effectiveness of the proposed weight assignment strategy through the IEEE 14-bus ***,the differences in the estimation accuracy and the bad data identification between the robust interval state estimation and deterministic state estimation are discussed.

关键词： Interval state estimation interval analysis pseudo-measurement Gaussian process regression(GPR)

Mediating role of health literacy in the relationship between social isolation and psychological distress among pre-frail older adults

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World Journal of Psychiatry 2025年第1期15卷 137-144页

作者： Juan Fang Li-hui Li Ming-Qian He Yue Ji Dong-yan Lu Li-Bing Zhang Jin-Lan Yao School of Medicine Huzhou UniversityHuzhou 313000Zhejiang ProvinceChina

BACKGROUND Frailty has become a significant public health *** recent increase in the number of frail older adults has led to increased attention being paid to psycho-logical care services in *** social isolation of pre-frail older adults can impact their psychological *** To explore the mediating effect of health literacy between social isolation and psychological distress among communitydwelling older adults with *** This descriptive cross-sectional study was conducted with 254 pre-frail older individuals aged 60 years and *** isolation,health literacy,and psycholo-gical distress were comprehensively measured using the Lubben Social Network Scale-6,12-item Short-Form Health Literacy Questionnaire,and the Kessler Psy-chological Distress *** were evaluated using the SPSS 27.0 package program and the PROCESS macro *** statistical analyses,correlation analyses,and bootstrap mediation tests were used to assess associations between the *** The results showed that social isolation had an effect on health literacy among pre-frail older adults(β=0.240,P<0.001),social isolation impact on psycho-logical distress pre-frail older adults(β=-0.415,P<0.001);health literacy was identified effect on psychological distress among pre-frail older persons(β=-0.307,P<0.001).Health literacy partially mediated the relationship between social isolation and psychological distress among community-dwelling older adults with pre-frailty,with a mediation effect of-0.074,accounting for 17.83%of the total effect.

关键词： Frail Ageing Psychological distress Health literacy Social isolation

Primary parenchymal squamous cell carcinoma of the kidney:A case report

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World Journal of Clinical Cases 2025年第4期13卷 34-40页

作者： Zhi-hui Zheng Bo Shao Chao-Min xu Ke Wang Jia-Zhu Wen Li-Kang Luo Jia-Cheng Guan Department of Ultrasound The Second People’s Hospital of QuzhouQuzhou 324000Zhejiang ProvinceChina Department of Radiology Shulan(Quzhou)HospitalQuzhou 324000Zhejiang ProvinceChina Department of Radiology The Second People’s Hospital of QuzhouQuzhou 324000Zhejiang ProvinceChina Department of Pathology The Second people’s Hospital of QuzhouQuzhou 324000Zhejiang ProvinceChina

BACKGROUND Primary squamous cell carcinoma(SCC)of the renal parenchyma is extremely rare,with only nine cases *** SUMMARY This study reports a 51-year-old man with primary SCC of the renal *** patient was admitted with recurrent dull pain and discomfort in the right lumbar region,which had worsened over 2 weeks,accompanied by painful gross *** antigen(SCCA)levels were elevated,and imaging revealed a renal mass with associated *** patient underwent laparoscopic unilateral nephrectomy and lymph node *** pathology confirmed highly differentiated SCC with necrosis in the right renal parenchyma,with negative renal pelvis and *** pathological stage was *** months after surgery,the tumor recurred with involvement of the liver,right psoas major muscle,and inferior vena *** patient refused chemotherapy and succumbed to the disease 6 months postoperatively due to disease *** We report a case of primary SCC of the renal parenchyma,a rare renal *** clinical symptoms,laboratory tests,and imaging findings are nonspecific,making accurate and timely diagnosis *** to the literature,for patients with renal calculi accompanied by a renal mass,elevated serum SCCA levels,and magnetic resonance imaging showing cystic or cystic-solid masses within the kidney with pseudocapsules and heterogeneous mild enhancement,the possibility of this disease should be considered.

关键词： Renal tumor Renal parenchyma Squamous cell carcinoma Renal calculi Computed tomography Case report

MgN_(4)掺杂石墨烯CO氧化催化活性的密度泛函研究

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原子与分子物理学报 2025年第2期42卷 57-62页

作者：袁利郑灵丹周慧颖徐先燕广州医科大学公共卫生学院广州511436 韶关学院化学与土木工程学院韶关512005

鉴于镁卟啉所呈现的催化活性,采用密度泛函理论考察了MgN_(4)结构掺杂石墨烯的CO氧化催化活性.研究发现MgN_(4)掺杂石墨烯具有良好的结构稳定性,O_(2)优先吸附在金属活性位点且不易解离.其CO氧化以Eley-Rideal(ER)机理实现,决速步能垒仅... 详细信息

鉴于镁卟啉所呈现的催化活性,采用密度泛函理论考察了MgN_(4)结构掺杂石墨烯的CO氧化催化活性.研究发现MgN_(4)掺杂石墨烯具有良好的结构稳定性,O_(2)优先吸附在金属活性位点且不易解离.其CO氧化以Eley-Rideal(ER)机理实现,决速步能垒仅为0.67 eV,与FeC_(3)、AlN_(4)掺杂石墨烯具有相当的催化活性.MgN_(4)掺杂石墨烯有望是一种具有潜在CO氧化催化活性的催化剂.

关键词： MgN_(4)掺杂石墨烯 CO氧化密度泛函理论

Effect of trace boron on corrosion resistance of rust layer of high-strength low-alloy steel in 3.5 wt.% NaCl solution

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Journal of Iron and Steel Research International 2023年第10期30卷 2080-2090页

作者： yan-hui Hou Ze-kun xu Guang-qiang Li The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan 430081HubeiChina Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education Wuhan University of Science and TechnologyWuhan 430081HubeiChina

The influence mechanism of trace boron on the corrosion resistance of high-strength low-alloy(HSLA)steel in a simulated marine environment was studied by combining first-principles calculation with *** effect of boron on the corrosion properties and corrosion morphology of the rust layer formed on the surface of HSLA steel was studied by means of corrosion weightlessness method,polarization curve,scanning electron microscopy(SEM)and X-ray diffraction(XRD)*** mass loss measurements and polarization curves revealed that the corrosion resistance of HSLA steel is improved by adding trace *** and SEM results show that the rust layer is produced byα-FeOOH(the main protective phase),Fe_(3)O_(4) andγ-FeOOH,and boron contributes to stability ofα-*** on the first-principles calculation,the solid solution of B atom in the corrosion product is beneficial to the fixation of Cl atom and to the reduction of the corrosion of Cl atom to the steel matrix.

关键词： Boron High-strength low-alloy steel Corrosion resistance NaCl solution Rust layer First-principles calculation

无囊膜支撑无晶状体眼Artisan人工晶状体植入术的疗效

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国际眼科杂志 2013年第5期13卷 1008-1010页

作者：杨广宇孙兴怀邹文军徐慧艳黄晓丽南京医科大学附属无锡第二医院无锡市第二人民医院眼科中国江苏省无锡市214002 复旦大学附属眼耳鼻喉科医院中国上海市200031

目的:探讨无囊膜支撑的无晶状体眼植入Artisan人工晶状体的有效性和安全性。方法:前瞻性地分析24例24眼无囊膜支撑的无晶状体眼植入虹膜固定Artisan人工晶状体的手术后结果。纳入病例包括外伤性晶状体脱位、视网膜脱离或球内异物行晶状... 详细信息

目的:探讨无囊膜支撑的无晶状体眼植入Artisan人工晶状体的有效性和安全性。方法:前瞻性地分析24例24眼无囊膜支撑的无晶状体眼植入虹膜固定Artisan人工晶状体的手术后结果。纳入病例包括外伤性晶状体脱位、视网膜脱离或球内异物行晶状体玻璃体切除术后及晶状体摘出术后囊膜缺失。手术前后进行完整的眼部检查,包括裸眼视力、眼压、角膜内皮计数、瞳孔形态、人工晶状体固定情况、虹膜玻璃体视网膜情况,记录手术中和手术后出现的并发症。结果:患者随访12～24mo。所有手术眼视力均有提高,手术前裸眼视力为手动～0.2(logMAR1.91±0.89),手术后末次随访裸眼视力为0.2～1.0(logMAR0.46±0.59)。手术后1,3,12mo术眼平均等效球镜度数分别为-1.26,-0.43,-0.35D,±2.0D以内者术后3mo和12mo分别占66.7%和83.3%,±1.0D以内者分别占41.7%和50%。手术前及术后3,12mo眼压分别为16.95±7.85,12.38±4.68,15.96±5.25mmHg。手术前及手术后3,12mo平均角膜内皮计数分别为2493.8,2270.3,2263.7个/mm2,手术后1～3mo,4～12mo内皮细胞丢失率分别为8.96%,0.27%,手术后12mo内皮细胞总丢失率为9.23%。手术后无持续性葡萄膜炎,虹膜无明显手术损伤和萎缩,瞳孔形态无变化,Artisan人工晶状体正位牢固固定,对玻璃体视网膜无影响。玻璃体切除眼手术中使用前房灌注可避免眼球塌陷。结论:无囊膜支撑的无晶状体眼植入虹膜固定Artisan人工晶状体是有效和安全的方法,但仍需要长期的随访观察以进一步对Artisan人工晶状体植入术作出评价。

关键词：无晶状体眼人工晶状体植入虹膜固定人工晶状体

Treatment and Prevention of Skeletal Fluorosis

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Biomedical and Environmental Sciences 2017年第2期30卷 147-149页

作者： yanG Chen WANG yan xu hui School of Pharmaceutical Sciences Jilin University Changchun 130021 Jilin China

Fluoride is soluble in water and accumulates in bone when absorbed by organism. Fluoride influences bone turnover by regulating certain factors, such as runt-related transcription factor 2 （Runx2） and receptor activ... 详细信息

关键词： Fluoride soluble water

基于灰色关联度的AHP权重矩阵构建方法改进及在农地评价中的应用

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地理科学进展 2016年第10期35卷 1249-1257页

作者：汪权方晏群徐慧王新生张景雄李兆华陈志杰湖北大学资源环境学院武汉430062 区域开发与环境响应湖北省重点实验室武汉430062 湖北省农业资源区划办武汉430071 武汉大学测绘学院武汉430079

合理确定评价指标的权重是准确测度农业土地资源可持续利用能力的关键所在。本文依据灰色关联度对层次分析法(AHP)中判断矩阵的构建方法进行了改进,并获取各项评价指标的权重。在此基础上,分别采用多目标线性加权函数综合评价模型和障... 详细信息

合理确定评价指标的权重是准确测度农业土地资源可持续利用能力的关键所在。本文依据灰色关联度对层次分析法(AHP)中判断矩阵的构建方法进行了改进,并获取各项评价指标的权重。在此基础上,分别采用多目标线性加权函数综合评价模型和障碍因子诊断模型,对2001-2012年湖北省枣阳市的农业土地资源可持续利用水平及其制约因素进行评估和辨析。结果显示:基于灰色关联分析法(GRA)改进后的AHP方法在确定指标权重时不仅能有效降低主观赋权的影响,也可避免熵值法等客观赋权法所存在的弊端;地均农业生产总值、人均耕地面积、化肥使用强度、有效灌溉面积、年降水量、人均GDP和农村居民家庭人均纯收入是制约枣阳市农业土地资源可持续利用的最主要因素,但在不同年份各因素的阻碍度表现不一。2001年以来,枣阳市农业土地资源利用的社会经济可持续性水平较高,综合可持续利用水平指数整体上呈增加的态势;但在生态可持续方面,2006年之后不仅明显低于之前年份,而且也显著低于同时期的社会经济可持续性。

关键词：农业土地资源可持续利用能力层次分析法灰色关联分析法障碍因子诊断湖北省枣阳市

Drug-induced liver injury in hospitalized patients with notably elevated alanine aminotransferase

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World Journal of Gastroenterology 2012年第41期18卷 5972-5978页

作者： hui-Min xu yan Chen Jie xu Quan Zhou Department of Pharmacy the 2nd Af-filiated Hospital School of Medicine Zhejiang University Hang-zhou 310009 Zhejiang Province China Department of Gastroenterology the 2nd AffiliatedHospital School of Medicine Zhejiang University Hangzhou310009 Zhejiang Province China Department of Information Technology the 2nd AffiliatedHospital School of Medicine Zhejiang University Hangzhou310009 Zhejiang Province China

AIM： To identify the proportion, causes and the nature of drug-induced liver injury （DILI） in patients with no- tably elevated alanine aminotransferase （ALT）. METHODS： All the inpatients with ALT levels above 10 times upper limit of normal range （ULN） were ret- rospectively identified from a computerized clinical laboratory database at our hospital covering a 12-mo period. Relevant clinical information was obtained from medical records. Alternative causes of ALT eleva- tions were examined for each patient, including bili- ary abnormality, viral hepatitis, hemodynamic injury, malignancy, DILI or undetermined and other causes. All suspected DILI cases were causality assessed usingthe Council for International Organizations of Medical Sciences scale, and only the cases classified as highly probable, probable, or possible were diagnosed as DILI. Comments related to the diagnosis of DILI in the medical record and in the discharge letter for each case were also examined to evaluate DILI detection by the treating doctors. RESULTS： A total of 129 cases with ALT 〉 i0 ULN were identified. Hemodynamic injury （n = 46, 35.7%）, DILl （n = 25, 19.4%） and malignancy （n = 21, 16.3%） were the top three causes of liver injury. Peak ALT val- ues were lower in DILI patients than in patients with hemodynamic injury （14.5 5.6 ULN vs 32.5 ：I： 30.7 ULN, P = 0.001）. Among DILI patients, one （4%） case was classified as definite, 19 （76%） cases were clas- sified as probable and 5 （20%） as possible according to the ClOMS scale. A hepatocellular pattern was ob- served in 23 （92%） cases and mixed in 2 （8%）. The extent of severity of liver injury was mild in 21 （84%） patients and moderate in 4 （16%）. Before discharge, 10 （40%） patients were recovered and the other 15 （60%） were improved. The improved patients tended to have a higher peak ALT （808 ＋ 348 U/L vs 623 ＋ 118 U/L, P = 0.016） and shorter treatment duration before discharge （8 ＋ 6 d vs 28 ~ 12 d, P = 0.008） compared with the recovered pati

关键词： Drug-induced liver injury Abnormal liverenzyme Alanine aminotransferase Underdiagnosis Adjunctive drugs