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Multiple Impact Factor Based Accuracy Analysis for Power Quality Disturbance Detection

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CSEE Journal of Power and Energy Systems 2023年第1期9卷 88-99页

作者： Zijing Yang Haochen hua Junwei cao Electromechanical Engineering Beijing Institute of Graphic CommunicationBeijing 102600China College of Energy and Electrical Engineering Hohai University 211100China Beijing National Research Center for Information Science and Technology Tsinghua UniversityBeijing 100084China

Nowadays,power quality problems are affecting people’s daily life and production *** an aim to improve disturbance detection accuracy,a novel analysis approach,based on multiple impact factors,is proposed in this ***,a multiple impact factors analysis is implemented in which two perspectives,i.e.,the wavelet analysis and disturbance features are simultaneously *** key factors,including wavelet function,wavelet decomposition level,redundant algorithm,event type and disturbance intensity,and start and end moment of disturbance,have been ***,an impact factor based accuracy analysis algorithm is proposed,through which each factor’s potential impact on disturbance location accuracy is *** transforms,i.e.,the classic wavelet,lifting wavelet and redundant lifting wavelet are employed,and their superiority on disturbance location accuracy is ***,simulations are conducted for *** the proposed method,the wavelet based parameters can be validly selected in order to accurately detect power quality disturbance.

关键词： Disturbance location accuracy impact factors power quality wavelet analysis

Brownfield Redevelopment Toward Sustainable Urban Land Use in China

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Chinese Geographical Science 2007年第2期17卷 127-134页

作者： cao Kang GUAN hua School of Geographic and Oceanographic Sciences Nanjing University Nanjing 210093 China

Brownfield redevelopment is a new urban land use strategy to pursue the ideal of sustainable development. It relieves environmental pressure and resolves the glaring contradiction between urban land idleness and urban sprawl. It addresses issues of urban land use and farmland protection in China. This paper compares brownfield with greenfield, and defines brownfield and its redevelopment. It elaborates general and special government policies for this sustainable land use strategy in the context of China. General policies contain two aspects: clarifying brownfield redevelopment's priority in Chinese urban planning and land use and setting a general quantitative redevelopment target. The extent of the government's special policies, which aim at coordinating three factors in the redevelopment process, namely govern- ments, developers and users, are divided into five areas: statistics and categorization, assessment and remediation, fi- nancial supports and tax incentives, environmental and legal liability, and publicity and guidance. The paper concludes the major functions of different levels of Chinese government in the redevelopment process, i.e. making general strategy, formulating legislation, spectifying regulations and technical standards, estimating and categorizing brownfield sites, drawing up brownfield planning, providing information and financial support, guiding developers, publicizing the strategy to the public, and checking reuse results.

关键词： brownfield redevelopment sustainable development land use

Study on the quality of recombinant proteins using matrix-assisted laser desorption ionization time of flight mass spectrometry

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World Journal of Gastroenterology 1999年第3期5卷 235-240页

作者： ZHOU Guo-hua LUO Guo-An SUN Guo-Qing cao Ya-Cheng and ZHU ming-Sheng 清华大学北京 100084 中科院南京土壤所江苏南京华东医学生物技术所江苏南京

AIM To study the possibility of matrix-assistedlaser desorption/ionization time of flight massspectrometry (MALDI--TOF MS) for controllingthe quality of recombinant *** By using MALDI--TOF MS, themoleCular weights and purity of recombinantbioactive proteins were *** The molecular weights and puritywere obtained in nine recombinant bioactiveproteins, including interleukin 2, tumor necrosisfactor Q, granulocyte--macrophage colonystimulating factor, interferon aZb, interferon al,erythropoietin, calmodulin and its fragment, andneuronal nitric oxide synthase were ***--TOF MS was also used to assay specificproteins in the mixtures and to characterize theerythropoietin tryptic *** The results showed that MALDITOF MS can be employed for the effective qualitycontrol of recombinant proteins.

关键词： MALDI time

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唐山市植被覆盖度时空演变及地形因子的响应

华北理工大学学报（自然科学版） 2025年第1期47卷 88-95页

作者：曹琳吴风华华北理工大学矿业工程学院河北唐山063210

植被覆盖度在生态环境质量评价、地表过程监测和生态保护决策等方面发挥着重要作用。研究基于GEE平台,采用像元二分法获取唐山市不同时段的植被覆盖度。通过Sen趋势分析和MK检验探讨植被覆盖度的时空演变情况。利用GIS叠加分析研究植被... 详细信息

植被覆盖度在生态环境质量评价、地表过程监测和生态保护决策等方面发挥着重要作用。研究基于GEE平台,采用像元二分法获取唐山市不同时段的植被覆盖度。通过Sen趋势分析和MK检验探讨植被覆盖度的时空演变情况。利用GIS叠加分析研究植被覆盖度与地形因子的关系。结果表明:(1)唐山市植被覆盖度稳定,城市建设区域和南部沿海地区较低,中部和北部低山区较高,中等级及以上占比超过65%。(2)在2001~2021年间,唐山市的植被覆盖度轻微改善,改善面积达到了39.041%。(3)植被覆盖度与高程和坡度显著相关,特别在高程200米以上和坡度15°~32°范围内,中高等级和高等级植被覆盖度较高。探究植被覆盖度演变对该地区的生态环境改善具有重要意义。

关键词：植被覆盖度时空演化地形因子

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Primary squamous cell carcinoma with sarcomatoid differentiation of the kidney associated with ureteral stone obstruction: A case report

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World Journal of Clinical Cases 2022年第32期10卷 11942-11948页

作者： Xue-hua Liu Qian-ming Zou Jia-Dong cao Zhi-Chao Wang Department of Urology Surgery Fangcun Hospital of Guangdong Provincial Hospital of traditional Chinese MedicineGuangzhou 510120Guangdong ProvinceChina

BACKGROUND Primary squamous cell carcinoma(SCC)with sarcomatoid differentiation of the kidney was rarely *** disease is usually related to renal stones,and due to a lack of symptoms and radiological features,patients usually attend the hospital with late stage *** SUMMARY A 54-years-old female presented with left flank pain and an abdominal mass for 6 *** studies revealed that the left kidney was enlarged and massive hydronephrosis was present.A stone was seen in the ureteropelvic *** patient subsequently underwent left radical nephrectomy,and histopathological examination of the mass revealed a poorly differentiated renal SCC with sarcomatoid *** primary surgery,the patient received four cycles of *** months later,the patient developed adrenal,lymph,and uterine appendage *** SCC of the kidney has a poor prognosis,and should be considered in patients with a renal mass,long-standing urinary calculi and massive hydronephrosis.

关键词： Squamous cell carcinoma Sarcomatoid differentiation Kidney Ureteral stone Case report

A maximum power point tracker for photovoltaic energy systems based on fuzzy neural networks

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2009年第2期10卷 263-270页

作者： Chun-hua LI Xin-jian ZHU Guang-yi cao Wan-qi HU Sheng SUI ming-ruo HU Fuel Cell Research Institute Shanghai Jiao Tong University Shanghai 200240. China Institute of Process Engineering Chinese Academy of Sciences Beijing 100080 China

To extract the maximum power from a photovoltaic （PV） energy system, the real-time maximum power point （MPP） of the PV array must be tracked closely. The non-linear and time-variant characteristics of the PV array and the non-linear and non-minimum phase characteristics of a boost converter make it difficult to track the MPP for traditional control strategies. We propose a fuzzy neural network controller （FNNC）, which combines the reasoning capability of fuzzy logical systems and the learning capability of neural networks, to track the MPP. With a derived learning algorithm, the parameters of the FNNC are updated adaptively. A gradient estimator based on a radial basis function neural network is developed to provide the reference information to the FNNC. Simulation results show that the proposed control algorithm provides much better tracking performance compared with the filzzy logic control algorithm.

关键词： Photovoltaic array Maximum power point tracking (MPPT) Fuzzy neural network controller (FNNC) Radial basis function neural network (RBFNN)

All-in-one cellulose based hybrid tribo/piezoelectric nanogenerator

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Nano Research 2019年第8期12卷 1831-1835页

作者： ming Li Yang Jie Li-hua Shao Yilin Guo Xia cao Ning Wang Zhong Lin Wang Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of SciencesNational Center for Nanoscience and Technology (NCNST)Beijing 100083China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049China Institute of Solid Mechanics Beihang UniversityBeijing 100083China Research Center for Bioengineering and Sensing Technology Beijing Key Laboratory for Bioengineering and Sensing TechnologySchool of Chemistry and Biological Engineering Beijing Municipal Key Laboratory of New Energy Materials and Technologiesand Center for Green InnovationSchool of Mathematics and PhysicsUniversity of Science and Technology Beijing Beijing 100083China School of Materials Science and Engineering Georgia Institute of Technology AtlantaGeorgia 30332USA

Aybrid tribo/piezoelectric nanogenerators (HTPENG) have been proven to be highly efficient and versatile as far as the collection and conversion of ambient energy are concerned, and the introduction of flexible and green materials is a key step for their potential applications. Here, we developed a HTPENG by using nitrocellulose nanofibril paper as the triboelectric layer and BaTiCVMWCNT@ bacterial cellulose paper as the piezoelectric layer. The output of the triboelelctric paper has considerable performance as fluorinated ethylene propylene, and the output of piezoelectric paper is more than ten times higher than the BTO/polydimethylsiloxane structure. The integrated outputs of the sandwich structured HTPENG are 18 V and 1.6 pA·cm^-2, which are capable of lighting up three LED bulbs and charging a 1 pF capacitor to 2.5 V in 80 s. In addition, the voltage signal generated by the HTPENG in contact-separation mode can be used for dynamic pressure detection. The linear range of dynamic pressure is from 0.5 to 3 N·cm^-2 with a high sensitivity of 8.276 V·cm^-2·N^-1 and a detection limit of 0.2 N·cm^-2. This work provides new insights into the design and application of cellulose-based hybrid nanogenerators with high flexibility and simple structure.

关键词： cellulose hybrid nanogenerator energy harvesting pressure sensor

Postoperative adjuvant transcatheter arterial chemoembolization improves the prognosis of patients with huge hepatocellular carcinoma

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Hepatobiliary & Pancreatic Diseases International 2021年第3期20卷 232-239页

作者： Han Wang hua Yu You-Wen Qian Zhen-Ying cao Meng-Chao Wu Wen-ming Cong Department of Pathology Eastern Hepatobiliary Surgery HospitalThe Second Military Medical UniversityYangpuShanghai 200438China Department of Hepatic Surgery Eastern Hepatobiliary Surgery HospitalThe Second Military Medical UniversityShanghai 200438China

Background: Surgical resection of huge hepatocellular carcinoma(HCC, ≥ 10 cm) is potentially curative. More adjuvant treatments are needed to reduce relapses in these patients. We evaluated the influence of postoperative adjuvant transcatheter arterial chemoembolization(PA-TACE) on the prognosis of huge HCC. Methods: Data from consecutive patients who underwent curative resection for huge HCC in our center were retrospectively collected. Recurrence-free survival(RFS) and overall survival(OS) were compared between patients who did and did not undergo PA-TACE. Propensity score matching(PSM) was used. Results: Among the 255 enrolled patients, 93 underwent PA-TACE. The clinical outcomes were significantly better in the PA-TACE group than those in the non PA-TACE group(5-year RFS rate: 33.5% vs. 18.0%;5-year OS rate: 47.0% vs. 28.0%, all P<0.001). After PSM, similar results were obtained(5-year RFS rate: 28.8% vs. 17.6%, P<0.001;5-year OS rate: 42.5% vs. 25.0%, P=0.004). PA-TACE decreased the possibility of early recurrence(<2 years, crude cohort: P<0.001, PSM cohort: P<0.001) but not late recurrence( ≥ 2 years, crude cohort: P=0.692, PSM cohort: P=0.325). Multivariable Cox regression analysis suggested that PA-TACE was an independent protective factor prolonging early RFS, RFS and OS. Conclusions: PA-TACE is a safe intervention for huge HCC patients after liver resection and improves outcomes.

关键词： Postoperative transcatheter arterial chemoembolization Recurrence Prognosis

Value of inflammatory mediator profiles and procalcitonin in predicting postoperative infection in patients with hypertensive cerebral hemorrhage

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World Journal of Clinical Cases 2022年第35期10卷 12936-12945页

作者： Rang-hua Yin Bin Zhang Xing-He Zhou Lu-Ping cao ming Li Department of Surgery Ji’an City Hospital of Traditional Chinese MedicineJi’an 343000Jiangxi ProvinceChina

BACKGROUND Hypertensive cerebral hemorrhage(HICH)is a common clinical cerebrovascular disease and one of the most serious complications of *** warning of the occurrence of infection during treatment and timely anti-infective treatment are of great significance for the early prevention and treatment of postoperative infection in patients with *** in the levels of inflammatory mediators,which are closely related to the occurrence and development of postoperative infection,and procalcitonin(PCT),which is a sensitive indicator for diagnosing bacterial infections,are widely used in clinical *** To explore the application value of inflammatory mediator profiles and PCT in predicting postoperative infection in patients with *** A total of 271 patients who underwent HICH surgery at our hospital between March 2019 and March 2021 were selected and divided into the infection(n=80)and non-infection(n=191)groups according to whether postoperative infection *** postoperative infection status and etiological characteristics of the infective pathogens in the infection group were *** in inflammatory mediator profile indices and PCT levels were compared between the two groups,pre-and *** A total of 109 strains of pathogenic bacteria were detected in the infection group,including 67 strains(61.47%)of gram-negative bacteria,32 strains(29.36%)of gram-positive bacteria,and 10 strains(9.17%)of *** main infection site of the patients in the infection group was the respiratory system(63.75%).Preoperative interleukin(IL)-4,IL-6,IL-10,tumor necrosis factor-α,interferon-γ,and PCT levels were higher in the infection group than in the non-infection group(P0.05).The inflammatory mediator profile indices and PCT levels were higher in the two groups of patients on the first postoperative day than preoperatively(P<0.05)

关键词： Hypertensive cerebral hemorrhage Postoperative infection Inflammatory mediator profiles Procalcitonin Prediction Immune function