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Fluid Pump Using a Bar-shaped Piezoelectric Transducer

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Chinese Journal of Mechanical Engineering 2011年第6期24卷 1130-1135页

作者： jin Jiamei WANG Yin YANG ying ZHANG Jianhui State Key Laboratory of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics and AstronauticsNanjing 210016China

There are two kinds of piezoelectric pumps:check valve pumps and valve-less *** to use a check valve or not depends upon the application *** achieve large backpressure for higher flow rates,the pump with check valve is ***,adding check valves implies more complex structure and higher probability of valve blocking,*** order to solve the problem,effective driving and transport mechanics with compact construction and reliable service are being *** this paper,using the second-order longitudinal vibration mode of a bar-shaped piezoelectric vibrator for driving fluid,a piezoelectric pump is successfully *** proposed piezoelectric pump consists of coaxial cylindrical shells and a bar-shaped piezoelectric vibrator,which has a disk part and a cone *** lead zirconium titanate ceramic rings fixed in the vibrator are polarized along the thickness *** the second-order longitudinal vibration of the vibrator along its axis is excited,the disk part of the vibrator changes periodically the volume of the chamber and the cone part acts as a pin valve,driving the fluid from the inlet port to the outlet *** elements analysis on the proposed pump model is carried out to verify its operation principle and design by the commercial FEM software *** of the piezoelectric pump were manufactured,assembled,and tested for flow rate and backpressure to validate the concepts of the proposed pump and confirm the simulation results of modal and harmonic *** test results show that the performance of the proposed piezoelectric pump is about 910 mL/min in flow rate with a highest pressure level of 1.5 kPa under 400 V peak-to-peak voltage and 51.7 kHz operating *** is confirmed that this bar-shaped piezoelectric transducer can be effectively applied in fluid transferring mechanism of pump through this research.

关键词： piezoelectric pump check valve longitudinal vibration mode FEM simulation bar-shaped transducer

Electrochemical Cycled Structure of MnV_2O_6 Nanoribbons Synthesized via Hydrothermal Route

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Chemical Research in Chinese Universities 2011年第3期27卷 528-530页

作者： HU Fang ZHANG Chun-hua ZHANG Song MING Xing CHEN Gang WEI Ving-jin WANG Chun-zhong School of Materials Science and Engineering Shenyang University of Technology Shenyang 110870 P. R. China＂ College of Physics and State Key Laboratory of Superhard Materials Jilin University Changchun 130012 P. R. Chin~ Sollege of Physical Science and Technology Huanggang Normal University Huanggang 438000 P. R. China

1 Introduction Low-dimensional nanostructures, such as nanorods, nanowires, and nanotubes, have received much attention for their superior optical, electrical, catalytic and magnetic properties. Owing to their low dimensionality and quantum continement effect, low-dimensional nanoscale materials can be exploited as fundamental building blocks for nanoscience and nanodevices^[1-3]. In recent years, efforts have been devoted to develop new approaches to synthesize one-dimensional（lD） nanostructrued vanadium oxides or vanadates materials, such as V205, NaV2Os, and CuV206, which have been widely investigated in catalytic or electrochemical fields due to their outstanding structural flexibility^[4-6].

关键词： MnV2O6 Hydrothermal route Electrochemical property Cycled structure

A scoring model based on plasma fibrinogen concentration for predicting recurrence of hepatocellular carcinoma after liver transplantation

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Liver Research 2019年第3期3卷 234-239页

作者： Kai-Ning Zeng ying-Cai Zhang Gen-Shu Wang Jian Zhang Yi-Nan Deng Shi-Hui Li Qi Zhang hua Li Guo-ying Wang Yang Yang Gui-hua Chen Department of Hepatic Surgery and Liver Transplant Program of the Third Affiliated Hospital Organ Transplantation InstituteSun Yat-sen UniversityOrgan Transplantation Research Center of Guangdong ProvinceGuangzhouChina Guangdong Key Laboratory of Liver Disease Research The Third Affiliated Hospital of Sun Yat-sen UniversityGuangzhouChina

Background:We investigated the prognostic value of preoperative fibrinogen levels in hepatocellular carcinoma patients receiving liver transplantation by building a scoring model for predicting tumor ***:Cox regression analysis was used to identify factors that predicted tumor recurrence,and a scoring model was generated by assigning a value of 0 or 1 to each independent risk *** cut-off value for fibrinogen was determined by receiver operating characteristic curve ***:Preoperative fibrinogen concentration was significantly higher in patients with *** tumor recurrence(3.27 g/L vs.2.34 g/L,P400 vs.400 ng/mL plasma alpha-fetoprotein concentration(3.43 g/L vs.2.76 g/L,P?0.007).The 5-year disease-free survival rate was significantly lower for patients with elevated(2.68 g/L)***(3 tumor nodules,and elevated fibrinogen concentration were independent risk factors for tumor recurrence.A scoring model based on these risk factors predicted recurrence with a sensitivity of 68.3%and a specificity of 87.5%.Conclusions:Elevated preoperative plasma fibrinogen concentration is associated with tumor recurrence in HCC patients after liver transplantation.A new scoring model predicted recurrence with good sensitivity and specificity.

关键词： Liver transplantation(LT) Hepatocellular carcinoma(HCC) Scoring model Recurrence Fibrinogen concentration

Application of Back-propagation Artificial Neural Network in Speciation of Cadmium

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Chemical Research in Chinese Universities 2010年第6期26卷 899-904页

作者： WANG Lin-lin ZHANG Jie LIU Hai-yan ZHANG Hai-tao WANG Hong-yan YANG Xiu-rong WANG ying-hua College of Chemistry Jilin University Changchun 130012 P. R. China State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 P. R. China

A method for predicting the five species contents of cadmium was developed by combining the back-propagation artificial neural network with graphite furnace atomic absorption spectrometry（BP-ANN-GF-AAS）.Based on the strong learning function and the features of the information distributed storage of artificial neural network（ANN）,a single ANN was constituted in which only one determination point of every sample was *** exchangeable,carbonated,Fe-Mn oxidable,organic and residual species of cadmium for 20 kinds of soil samples from the two sections of Changchun（China） were determined by *** detection limit of the method is 0.024 μg/L and the limit of quantification is 0.080 μg/L.t-Test indicates that there is not any systemic error of the results obtained by the Tessier sequential extraction graphite furnace atomic absorption spectrometry method（Tessier-GF-AAS） and *** with those of the Tessier-GF-AAS,the prediction errors of BP-ANN-GF-AAS are less than 10%.The proposed method is fast,convenient,sensitive,and can eliminate the interference among various species.

关键词： Artificial neural network(ANN) Speciation Graphite furnace atomic absorption spectrometry(GF-AAS) Cadmium

Influence of Ligand with Fine Difference at Donor Site on MMCT Property in Binuclear Mixed Valence Complexes

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Chinese Journal of Structural Chemistry 2021年第2期40卷 207-216,147页

作者： LI Su-hua YANG Yu-ying ZHANG Yu-Xiao WU Xin-Tao SHENG Tian-Lu State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China College of Chemistry Fuzhou UniversityFuzhou 350002China University of Chinese Academy of Sciences Beijing 100049China

To investigate how the electronic effect of ligand at donor site influences electronic communication or metal-to-metal charge transfer(MMCT)properties in similar mixed-valence(MV)complexes,a series of binuclear organometallic complexes,MeCp(dppe)RuCNFeCl_(3)(1),MeCp(PPh_(3))_(2)RuCNFeCl_(3)(2),Cp^(*)(dppe)FeCNFeCl_(3)(3),Cp^(*)(dppe)RuCNFeCl_(3)(4)and Cp^(*)(PPh_(3))_(2)RuCNFeCl_(3)(5),have been synthesized and *** electronic absorptions of these complexes show the presence of MMCT properties between RuⅡ or FeⅡ and FeⅢ ions,strongly supported by the theoretical *** increasing electron-donating ability of ligands(PPh3>dppe,Cp^(*)>MeCp)at donor site,the MMCT absorption bands are red-shifted,which expresses in the sequence of absorption bands with 1(500 nm),4(536 nm),2(542 nm),5(580 nm)from high-energy to ***,the MMCT absorption energy of 4(536 nm)is larger than that of 3(760 nm)due to the stronger electron-donating ability of FeⅡ than RuⅡ.Furthermore,these complexes belong to the Class Ⅱ systems according to the Robin and Day’s classification.

关键词： metal-to-metal charge transfer(MMCT) mixed-valence complexes ClassⅡ

和血荣肤汤治疗自身免疫性肝病瘙痒症临床观察

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北京中医药 2024年第6期43卷 590-593页

作者：靳华汪晓军赵世娇王一同首都医科大学附属北京佑安医院中西医结合中心北京100069

目的探讨和血荣肤汤对自身免疫性肝病(autoimmune liver diseases,AILD)瘙痒症患者的临床疗效。方法选择2019年1月―2022年12月收治的72例AILD瘙痒症患者,采用随机数字表法分为对照组和观察组,各36例。对照组给予熊去氧胆酸胶囊、炉甘... 详细信息

目的探讨和血荣肤汤对自身免疫性肝病(autoimmune liver diseases,AILD)瘙痒症患者的临床疗效。方法选择2019年1月―2022年12月收治的72例AILD瘙痒症患者,采用随机数字表法分为对照组和观察组,各36例。对照组给予熊去氧胆酸胶囊、炉甘石洗剂及氯雷他定对症治疗,观察组在对照组治疗基础上给予和血荣肤汤治疗。治疗2周,观察治疗前后2组患者的肝功能指标、5-D瘙痒量表评分的变化、视觉模拟评分(VAS)、总有效率,随访1年的复发率。结果治疗后,2组肝功能指标、5-D瘙痒量表各单项积分及总分、VAS评分均较治疗前明显下降(P<0.05),且观察组优于对照组(P<0.05);观察组总有效率91.67%明显优于对照组的61.11%(P<0.05);观察组1年复发率为22.22%,明显低于对照组的72.22%,差异有统计学意义(P<0.05)。结论和血荣肤汤联合熊去氧胆酸胶囊、炉甘石洗剂和氯雷他定可以更好缓解AILD瘙痒症患者的瘙痒症状,减少瘙痒复发,提高患者生活质量,临床疗效安全可靠。

关键词：自身免疫性肝病瘙痒症和血荣肤汤中医药疗法

Effects of Elevated CO_2 on Growth, Carbon Assimilation, Photosynthate Accumulation and Related Enzymes in Rice Leaves during Sink-Source Transition

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Journal of Integrative Plant Biology 2008年第6期50卷 723-732页

作者： Jun-ying Li Xing-hua Liu Qing-Sheng Cai Hui Gu Shan-Shan Zhang Yan-Yan Wu Chun-Jiao Wang College of Life Sciences Nanjing Agricultural University N anjing 210095 China Yunnan Tobacco Research Institute Yuxi 653100 China

To study the effects of growing rice （Oryza sativa L.） leaves under the treatment of the short-term elevated CO2 during the period of sink-source transition, several physiological processes such as dynamic changes in photosynthesis, photosynthate accumulation, enzyme activities （sucrose phosphate synthase （SPS）, and sucrose synthase （SS））, and their specific gene （spsl and RSusl） expressions in both mature and developing leaf were measured. Rice seedlings with fully expanded sixth leaf （marked as the source leaf, L6） were kept in elevated （700 μmol/mol） and ambient （350 mol/L） CO2 until the 7th leaf （marked as the sink leaf, L7） fully expanded. The results demonstrated that elevated CO2 significantly increased the rate of leaf elongation and biomass accumulation of L7 during the treatment without affecting the growth of L6. However, in both developing and mature leaves, net photosynthetic assimilation rate （A）, all kinds of photosynthate contents such as starch, sucrose and hexose, activities of SPS and SS and transcript levels of spsl and RSusl were significantly increased under elevated CO2 condition. Results suggested that the elevated CO2 had facilitated photosynthate assimilation, and increased photosynthate supplies from the source leaf to the sink leaf, which accelerated the growth and sink-source transition in new developing sink leaves. The mechanisms of SPS regulation by the elevated CO2 was also discussed.

关键词： elevated CO2 photosynthate photosynthesis rice sink-source transition sucrose metabolism

Comparison between two autorefractor performances in large scale vision screening in Chinese school age children

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International Journal of Ophthalmology(English edition) 2020年第10期13卷 1660-1666页

作者： Di Wang Nan jin Ru-Xia Pei Li-Qiong Zhao Bei Du Gui-hua Liu Xi-Lian Wang Rui-hua Wei Xiao-Rong Li Tianjin International Joint Research and Development Centre of Ophthalmology and Vision Science Eye Institute and School of OptometryTianjin Medical University Eye HospitalTianjin 300384China Tianjin Beichen District Hospital of Traditional Chinese Medicine Tianjin 300400China

AIM:To evaluate the effectiveness of Grand Seiko Ref/Keratometer WAM-5500 compared to Topcon KR800 autorefractor in detecting refractive error in large scale vision screening for Chinese school age children with the WHO ***:A total of 886 participants were enrolled with mean age of 9.49±1.88 y from Tianjin,*** equivalent(SE)was obtained from un-cycloplegic autorefraction and cycloplegic *** KR 800(Topcon)and Grand Seiko WAM-5500(WAM)autorefractors were ***-Altman Plot and regression were generated to compare their *** overall effectiveness of detecting early stage refractive error was analyzed with receiver operating characteristic(ROC)***:The mean SE was-0.98±1.81 diopter(D)and the prevalence of myopia was 48.9%defined by WHO criteria according to the result of cycloplegic *** mean SE of un-cycloplegic autorefraction with Topcon and WAM were-1.21±1.65 and-1.20±1.68 D *** was a strong linear agreement between result obtained from WAM and cycloplegic autorefraction with an R2 of ***-Altman plot indicated a moderate agreement of cylinder values between the two *** sensitivity and specificity for detecting hyperopia were 90.52%and 83.51%;for detecting myopia were 95.60%and 90.24%;for detecting astigmatism were 79.40%and 90.21%;for detecting high myopia were 98.16%and 98.91%***:These findings suggest that both Grand Seiko and Topcon autorefractor can be used in large-scale vision screening for detecting refractive error in Chinese *** Seiko gives relatively better performance in detecting myopia,hyperopia,and high myopia for school age children.

关键词： myopia vision screening autorefraction spherical equivalent Grand Seiko WAM-5500

Cholecystoenteric fistula in a patient with advanced gallbladder cancer: A case report and review of literature

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World Journal of Clinical Cases 2023年第36期11卷 8519-8526页

作者： Chun-Yu Wang Sung-hua Chiu Wei-Chou Chang Meng-Hsing Ho Ping-ying Chang Department of General Medicine Tri-Service General HospitalNational Defense Medical CenterTaipei 114Taiwan Department of Radiology Tri-Service General HospitalNational Defense Medical CenterTaipei 114Taiwan Division of General Surgery Department of SurgeryTri-Service General HospitalNational Defense Medical CenterTaipei 114Taiwan Division of Hematology/Oncology Department of Internal MedicineTri-Service General HospitalNational Defense Medical CenterTaipei 114Taiwan

BACKGROUND Cholecystoenteric fistula(CEF)involves the formation of a spontaneous ano-malous tract between the gallbladder and the adjacent gastrointestinal *** gallbladder inflammation can lead to tissue necrosis,perforation,and *** most prevalent cause of CEF is chronic cholelithiasis,which rarely results from *** the symptoms and laboratory findings associated with CEF are nonspecific,the condition is often misdiagnosed,pre-senting a challenge to the surgeon when detected ***,a preoperative diagnosis of CEF is *** present the case of a 57-year-old male with advanced gallbladder cancer(GBC)who arrived at the emergency room with persistent vomiting,abdominal pain,and *** abdominopelvic computed tomography scan revealed a contracted gallbladder with bubbles in the fundus connected to the second por-tion of the duodenum and transverse *** suspected that GBC had invaded the adjacent gastrointestinal tract through a cholecystoduodenal fistula(CDF)or a cholecystocolonic fistula(CCF).He underwent multiple examinations,including esophagogastroduodenoscopy,an upper gastrointestinal series,colo-noscopy,and magnetic resonance cholangiopancreatography;the results of these tests con-firmed a diagnosis of synchronous CDF and *** patient underwent a Roux-en-Y gastrojejunostomy and loop ileostomy to address the severe adhesions that were previously observed to cover the second portion of the duodenum and hepatic flexure of the *** symptoms improved with supportive treatment while *** initiated oral targeted therapy with lenvatinib for further anticancer *** The combination of imaging and surgery can enhance preoperative diagnosis and alleviate symptoms in patients with GBC complicated by CEF.

关键词： Cholecystoenteric fistula Biliary enteric fistula Cholecystoduodenal fistula Cholecystocolonic fistula Gallbladder neoplasms Case report