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Enhancing the powering ability of triboelectric nanogenerator through output signal’s management strategies

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Nano Research 2023年第9期16卷 11783-11800页

作者： Changxin Qi Zhenyue Yang Jinyan Zhi Ruichao Zhang juan wen Yong Qin Institute of Nanoscience and Nanotechnology School of Materials and EnergyLanzhou UniversityLanzhou 730000China

As a new branch of efficient and low-cost mechanical energy conversion technology,triboelectric nanogenerator(TENG)is a potential solution to provide a long-term power supply for the Internet of Things(IoT)sensors and portable electronic ***,due to inherent working properties of TENG itself such as extremely high internal impedance,pulse,and alternating current(AC)output,TENG can not directly supply power to loads such as batteries *** on these,we describe TENG’s performance from a new perspective of powering *** consists of two aspects:the ability to transport charge effectively and the ability to output high power quality current *** order to push forward the developments and applications of TENG,it is necessary to improve its power supply capacity from different ***,in recent years,a variety of output signal’s management strategies aiming at effectively managing the generated electricity and significantly improving powering ability of TENG have obtained significantly ***,this paper discusses the working mechanisms and different load characteristics of TENG at first to clarify the electric performance of ***,on basis of theoretical analysis,the output signal’s management strategies are elaborated from four aspects:improving the cycle output electricity of TENG,increasing the surface charge density of TENG,improving the power quality of TENG-based energy harvesting system,promoting the application of TENG through integrated circuit(IC)technology and TENG network,and the relevant principles and applications are discussed ***,the advantages and disadvantages of the above output signal’s management strategies are summarized and discussed,and the future development of the output signal’s management strategies for TENG is prospected.

关键词： triboelectric nanogenerator(TENG) inherent working properties TENG-based energy harvesting system powering ability output signal’s management strategies.

Comprehensive recovery of gold and base-metal sulfide minerals from a low-grade refractory ore

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International Journal of Minerals,Metallurgy and Materials 2016年第12期23卷 1377-1386页

作者： wen-juan Li Shuang Liu Yong-sheng Song Jian-kang wen Gui-ying Zhou Yong Chen National Engineering Laboratory of Biohydrometallurgy General Research Institute for Nonferrous Metals School of Chemical & Environmental Engineering China University of Mining & TechnologyBeijing

The comprehensive recovery of small amounts of valuable minerals such as gold and base-metal sulfide minerals from a low-grade refractory ore was investigated. The following treatment strategy was applied to a sample of this ore： gold flotation-gold concen- trate leaching-lead and zinc flotation from the gold concentrate leaching residue. Closed-circuit trials of gold flotation yielded a gold concen- trate that assayed at 40.23 g·t-1 Au with a recovery of 86.25%. The gold concentrate leaching rate was 98.76%. Two variants of lead-zinc flotation from the residue--preferential flotation of lead and zinc and bulk flotation of lead and zinc--were tested using the middling processing method. Foam from the reflotation was returned to the lead rougher flotation or lead-zinc bulk flotation, whereas middlings from reflotation were discarded. Sulfur concentrate was a byproduct. The combined strategy of flotation, leaching, and flotation is recommended for the treatment of this kind of ore.

关键词： comprehensive recovery gold sulfide minerals mineralogy refractory ore treatment

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The impact of solar activity on the 2015/16 El Ni?o event

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Atmospheric and Oceanic Science Letters 2016年第6期9卷 428-435页

作者： HUO wen-juan XIAO Zi-Niu State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric PhysicsChinese Academy of SciencesBeijingChina College of Earth Science University of Chinese Academy of SciencesBeijingChina

Recent SST and atmospheric circulation anomaly data suggest that the 2015/16 El Nino event is quickly decaying. Some researchers have predicted a forthcoming La Nina event in late summer or early fall 2016. From the perspective of the modulation of tropical SST by solar activity, the authors studied the evolution of the 2015/16 El Nino event, which occurred right after the 2014 solar peak year. Based on statistical and composite analysis, a significant positive correlation was found between sunspot number index and El Ni^o Modoki index, with a lag of two years. A clear evolution of El Nino Modoki events was found within 1-3 years following each solar peak year during the past 126 years, suggesting that anomalously strong solar activity during solar peak periods favors the triggering of an El Nino Modoki event. The patterns of seasonal mean SST and wind anomalies since 2014 are more like a mixture of two types of El Nino （i.e. eastern Pacific El Nino and El Nino Modoki）, which is similar to the pattern modulated by solar activity during the years following a solar peak. Therefore, the El Nino Modoki component in the 2015/16 El Nino event may be a consequence of solar activity, which probably will not decay as quickly as the eastern Pacific El Nino component. The positive SST anomaly will probably sustain in the central equatorial Pacific （around the dateline） and the northeastern Pacific along the coast of North America, with a low-intensity level, during the second half of 2016.

关键词： El Nino El Nino Modoki solaractivity SST atmospheric circulation

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Subacute liver and respiratory failure after segmental hepatectomy for complicated hepatolithiasis with secondary biliary cirrhosis: A case report

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World Journal of Gastrointestinal Surgery 2022年第4期14卷 341-351页

作者： wen-juan Fan Xiao-Jing Zou Department of Gastroenterology Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030Hubei ProvinceChina Emergency Department/Intensive Care Unit Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030Hubei ProvinceChina

BACKGROUND Despite being a benign disease, hepatolithiasis has a poor prognosis because of its intractable nature and frequent recurrence. Nonsurgical treatment is associated with high incidences of residual and recurrent stones. Consequently, surgery via hepatic lobectomy or segmental hepatectomy has become the main treatment modality. Clinical management and resolution of complicated hepatolithiasis with bilateral or diffuse intrahepatic stones remain very difficult and challenging. Repeated cholangitis and calculous obstruction may result in secondary biliary cirrhosis, a limiting factor in the treatment of *** SUMMARY A 53-year-old woman with a 5-year history of intermittent abdominal pain and fever was admitted to the hepatopancreatobiliary surgery department following worsening symptoms over a 3-d period. Blood tests revealed elevated transaminases, alkaline phosphatase, γ-glutamyl transpeptidase, and total bilirubin, as well as anemia. Magnetic resonance cholangiopancreatography showed dilatation of the intrahepatic, left and right hepatic, common hepatic, and common bile ducts, and multiple short T2 signals in the intrahepatic and common bile ducts. Abdominal computed tomography showed splenomegaly and splenic varices. The diagnosis was bilateral hepatolithiasis and choledocholithiasis with cholangitis. Surgical treatment included hepatectomy of segments Ⅱ and Ⅲ, cholangioplasty, left hepaticolithotomy, second biliary duct exploration, choledocholithotomy, T-tube drainage, and accretion lysis. Surgical and pathological findings confirmed secondary biliary cirrhosis. Liver-protective therapy and anti-infectives were administered. The patient developed liver and respiratory failure, severe abdominal infection, and septicemia. Eventually, her family elected to discontinue *** Liver transplantation, rather than hepatectomy, might be a treatment option for complicated bilateral hepatolithiasis with secondary liver cirrhosis.

关键词： Hepatolithiasis Hepatectomy Liver failure Biliary cirrhosis Septicemia Case report

Role of the surface chemistry of activated carbons in dye removal from aqueous solution

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International Journal of Minerals,Metallurgy and Materials 2015年第7期22卷 770-776页

作者： Hua-lei Zhou wen-juan Zhen Qian Zhu Xiao-bin Wu Zhi-dong Chang wen-jun Li Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials School of Chemistry and Biological Engineering University of Science and Technology Beijing

Commercial activated carbons were modified by a series of chemical or physical treatments using H202, NH3, and heating under N2 flow without notably changing their pore structures. The resultant carbons were characterized by N2 adsorption and Bohem titration and then used to remove Ponceau 4R, methyl orange and brilliant blue from aqueous solutions. Surface chemistry was found to play a signifi- cantly different role in removing these three compounds. The removal of anionic Ponceau 4R increases with increasing carbon surface ba- sicity due to the predominant dispersive interaction mechanism. In contrast, surface chemistry has little effect on the removal of anionic methyl orange, which can be explained by two parallel mechanisms involving electrostatic and dispersive interactions due to the basic amine group in a dye molecule. The influence of surface chemistry on the removal of amphoteric brilliant blue dye can also be ignored due to a weak interaction between the carbons and dye molecules, which is resulted from strong cohesive energy from electrostatic forces inside amphoteric dye molecules.

关键词： activated carbon decolorization dyes modification surface chemistry

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Surgical treatments of recurrent small intestine metastatic melanoma manifesting with gastrointestinal hemorrhage and intussusception:A case report

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World Journal of Gastrointestinal Oncology 2023年第1期15卷 205-214页

作者： wen-juan Fan Heng-Hui Cheng Wang Wei Department of Gastroenterology Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030Hubei ProvinceChina Hubei Key Laboratory of Hepato-Pancreato-Biliary Diseases Wuhan 430030Hubei ProvinceChina Institution of Pathology Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030Hubei ProvinceChina

BACKGROUND Melanoma is the most aggressive form of skin cancer,with a tendency to metastasize to any *** melanoma is the most frequent cause of skin cancer-related deaths *** intestine cancers especially small intestine metastases are relatively *** intestine metastases are seldom described and likely *** is most common in pediatric age,and in adults are almost 5%of all *** SUMMARY A 75-year-old man with a history of acral malignant melanoma was admitted to the Gastroenterology Department of our hospital,complaining of intermittent melena for 1 *** resonance enterography showed partial thickening of the jejunal wall and formation of a soft tissue mass,indicating a neoplastic lesion with jejunojejunal *** patient underwent partial small bowel *** findings and immunohistochemical staining indicated small intestine metastatic *** patient refused further anti-tumor treatment after the *** months after the first surgery,the patient presented with melena *** tomography enterography showed the anastomotic stoma was normal without thickening of the intestinal wall,and routine conservative treatment was *** months later,the patient developed melena *** patient underwent a second surgery,and multiple metastatic melanoma lesions were *** patient refused adjuvant anti-tumor treatment and was alive at the latest *** Small intestine metastatic melanoma should be suspected in any patient with a history of malignant melanoma and gastrointestinal symptoms.

关键词： Melanoma Metastasis Gastrointestinal hemorrhage Intussusception Small bowel resection Case report

Linguistic Steganalysis via Fusing Multi-Granularity Attentional Text Features

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Chinese Journal of Electronics 2023年第1期32卷 76-84页

作者： wen juan DENG Yaqian PENG Wanli XUE Yiming College of Information and Electrical Engineering China Agricultural University

Deep learning based language models have improved generation-based linguistic steganography,posing a huge challenge for linguistic steganalysis. The existing neural-network-based linguistic steganalysis methods are incompetent to deal with complicated text because they only extract single-granularity features such as global or local text features. To fuse multi-granularity text features, we present a novel linguistic steganalysis method based on attentional bidirectional long-shortterm-memory(BiLSTM) and short-cut dense convolutional neural network(CNN). The BiLSTM equipped with the scaled dot-product attention mechanism is used to capture the long dependency representations of the input sentence. The CNN with the short-cut and dense connection is exploited to extract sufficient local semantic features from the word embedding matrix. We connect two structures in parallel, concatenate the long dependency representations and the local semantic features, and classify the stego and cover texts. The results of comparative experiments demonstrate that the proposed method is superior to the state-of-the-art linguistic steganalysis.

关键词： Deep learning Steganography Fuses Semantics Transfer learning Linguistics Feature extraction

Secondary aortoesophageal fistula initially presented with empyema after thoracic aortic stent grafting:A case report

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World Journal of Clinical Cases 2021年第29期9卷 8938-8945页

作者： De-Qiong Wang Mei Liu wen-juan Fan Department of Gastroenterology Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030Hubei ProvinceChina

BACKGROUND Massive upper gastrointestinal(GI)bleeding is usually urgent and severe,and is mostly caused by GI *** fistula(AEF)after thoracic aortic stent grafting is a rare cause of this condition,and has a poor prognosis with a high mortality *** clinical symptoms of AEF are usually nonspecific,and the diagnosis is often difficult,especially when upper GI bleeding is *** identification,early diagnosis,and early treatment are very important for improving *** SUMMARY A 74-year-old man was admitted to the infectious disease department with>10-d fever and 10-mo prior history of thoracic aortic stent grafting for thoracic aortic penetrating *** tests revealed elevated inflammatory indicators and *** computed tomography(CT)showed postoperative changes of the aorta after endovascular stent graft implantation,pulmonary infection and pleural *** effusion tests showed *** 1 wk of anti-infective treatment,temperature returned to normal and chest CT indicated improvement in pulmonary infection and reduction of pleural *** endoscopy was performed because of epigastric discomfort,and showed a large ulcer with blood clot in the middle ***,on day 11,hematemesis and melena developed *** stopped temporarily after hemostatic treatment and bedside endoscopic *** and abdominal aortic CT angiography confirmed *** that day,he suffered massive hemorrhage and hemorrhagic ***,his family elected to discontinue *** AEF should be strongly considered in patients with a history of aortic intervention who present with fever,especially with empyema.

关键词： Gastrointestinal hemorrhage Esophageal fistula Esophageal perforation Thoracic aorta Empyema Case report

NR4A1 enhances glycolysis in hypoxia-exposed pulmonary artery smooth muscle cells by upregulating HIF-1αexpression

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BIOCELL 2023年第11期47卷 2423-2433页

作者： CHENYANG CHEN juan wen WEI HUANG JIANG LI Cardiovascular Department The Third Xiangya Hospital of Central South UniversityChangsha410013China Department of Cardiovascular Medicine The Second Xiangya HospitalCentral South UniversityChangsha410011China

Background:Pulmonary arterial hypertension(PAH)is a chronic and progressive disease that is strongly associated with dysregulation of glucose *** in nuclear receptor subfamily 4 group A member 1(NR4A1)activity alter the outcome of *** study aimed to investigate the effects of NR4A1 on glycolysis in PAH and its underlying ***:This study included twenty healthy volunteers and twenty-three PAH patients,and plasma samples were collected from the *** mimic the conditions of PAH in vitro,a hypoxia-induced model of pulmonary artery smooth muscle cell(PASMC)model was *** proliferation of PASMCs was assessed using CCK8 ***:Levels of NR4A1,hypoxia-inducible factor-1α(HIF-1α),and various glycolysis-related enzymes were *** addition,extracellular glucose and lactate production were *** interaction between NR4A1 and HIF-1αwas evaluated by co-immunoprecipitation *** of NR4A1 and HIF-1αwas increased in PAH patients,and exposure to hypoxia resulted in increased levels of NR4A1 and HIF-1αin ***4A1 interacted with HIF-1α.NR4A1 overexpression enhanced hypoxia-induced expression of HIF-1α,GLUT1,PKM2,HK2,and CD36,decreased glucose levels,increased lactate levels and promoted hypoxic PASMC ***,silencing NR4A1 decreased hypoxia-induced expression of HIF-1α,GLUT1,PKM2,HK2,and CD36,promoted glucose production,reduced lactate levels and inhibited hypoxic PASMC ***,overexpression of HIF-1αreversed the regulation of glycolysis caused by NR4A1 ***:NR4A1 enhances glycolysis in hypoxia-induced PASMCs by upregulating HIF-1α.Our findings indicate that the management of NR4A1 activity may be a promising strategy for PAH therapy.

关键词： Pulmonary arterial hypertension NR4A1 HIF-1α Glycolysis Hypoxia Pulmonary arterial smooth muscle cells