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89篇 您的检索式:作者名="Fan Lyu"
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1Multimorbidity patterns and association with mortality in 0.5 million Chinese adults显示文摘Background:Few studies have assessed the relationship between multimorbidity patterns and mortality risk in the Chinese population.We aimed to identify multimorbidity patterns and examined the associations of multimorbidity patterns and the number of chronic diseases with the risk of mortality among Chinese middle-aged and older adults.Methods:We used data from the China Kadoorie Biobank and included 512,723 participants aged 30 to 79 years.Multimorbidity was defined as the presence of two or more of the 15 chronic diseases collected by self-report or physical examination at baseline.Multimorbidity patterns were identified using hierarchical cluster analysis.Cox regression was used to estimate the associations of multimorbidity patterns and the number of chronic diseases with all-cause and cause-specific mortality.Results:Overall,15.8%of participants had multimorbidity.The prevalence of multimorbidity increased with age and was higher in urban than rural participants.Four multimorbidity patterns were identified,including cardiometabolic multimorbidity(diabetes,coronary heart disease,stroke,and hypertension),respiratory multimorbidity(tuberculosis,asthma,and chronic obstructive pulmonary disease),gastrointestinal and hepatorenal multimorbidity(gallstone disease,chronic kidney disease,cirrhosis,peptic ulcer,and cancer),and mental and arthritis multimorbidity(neurasthenia,psychiatric disorder,and rheumatoid arthritis).During a median of 10.8 years of follow-up,49,371 deaths occurred.Compared with participants without multimorbidity,cardiometabolic multimorbidity(hazard ratios[HR]=2.20,95%confidence intervals[CI]:2.14-2.26)and respiratory multimorbidity(HR=2.13,95%CI:1.97-2.31)demonstrated relatively higher risks of mortality,followed by gastrointestinal and hepatorenal multimorbidity(HR=1.33,95%CI:1.22-1.46).The mortality risk increased by 36%(HR=1.36,95%CI:1.35-1.37)with every additional disease.Conclusion:Cardiometabolic multimorbidity and respiratory multimorbidity posed the highest threat on mortality risk and deserved particular attention in Chinese adults.Junning Fan Zhijia Sun Canqing Yu Yu Guo Pei Pei Ling Yang Yiping Chen Huaidong Du Dianjianyi Sun Yuanjie Pang Jun Zhang Simon Gilbert Daniel Avery Junshi Chen Zhengming Chen Jun Lyu Liming Li On Behalf of the China Kadoorie Biobank Collaborative Group 2022Chinese Medical Journal2022,,6:17
2Nonlinear dynamic modeling of a helicopter planetary gear train for carrier plate crack fault diagnosis显示文摘Planetary gear train plays a significant role in a helicopter operation and its health is of great importance for the flight safety of the helicopter.This paper investigates the effects of a planet carrier plate crack on the dynamic characteristics of a planetary gear train,and thus finds an effective method to diagnose crack fault.A dynamic model is developed to analyze the torsional vibration of a planetary gear train with a cracked planet carrier plate.The model takes into consideration nonlinear factors such as the time-varying meshing stiffness,gear backlash and viscous damping.Investigation of the deformation of the cracked carrier plate under static stress is performed in order to simulate the dynamic effects of the planet carrier crack on the angular displacement of carrier posts.Validation shows good accuracy of the developed dynamic model in predicting dynamic characteristics of a planetary gear train.Fault features extracted from predictions of the model reveal the correspondence between vibration characteristic and the conditions(length and position)of a planet carrier crack clearly.Fan Lei Wang Shaoping Wang Xingjian Han Feng Lyu Huawei 2016Chinese Journal of Aeronautics2016,29,3:16
3Wastewater reclamation and reuse in China:Opportunities and challenges显示文摘The growing water stress both in terms of water scarcity and quality deterioration promotes the development of reclaimed water as a new water resource use. This paper reviewed wastewater reuse practices in China, and the opportunities and challenges of expanding reclaimed water use were analyzed. Rapid urbanization with the increasing of water demand and wastewater discharge provides an opportunity for wastewater reuse. The vast amount of wastewater discharge and low reclaimed water production mean that wastewater reuse still has a great potential in China. Many environmental and economic benefits and successful reclamation technologies also provide opportunities for wastewater reuse. In addition, the overall strategy in China is also encouraging for wastewater reuse. In the beginning stage of wastewater reclamation and reuse, there are many significant challenges to expand wastewater reuse in China including slow pace in adopting urban wastewater reuse programs, the establishment of integrated water resources management framework and guidelines for wastewater reuse programs, incoherent water quality requirements, the limited commercial development of reclaimed water and the strengthening of public awareness and cooperation among stakeholders.Sidan Lyu Weiping Chen Weiling Zhang Yupeng Fan Wentao Jiao 2016Journal of Environmental Sciences2016,28,1:15
4Effects of Plasma Lipids and Statins on Cognitive Function显示文摘Rui Li Tian-Jun Wang Pei-Yuan Lyu Yang Liu Wei-Hong Chen Ming-Yue Fan Jing Xu 2018Chinese Medical Journal2018,,4:14
5Traditional Chinese medicine in COVID-19显示文摘COVID-19 pandemic caused by severe acute respiratory syndrome coronavirus 2(SARSCo V-2)has spread across the globe,posing an enormous threat to public health and safety.Traditional Chinese medicine(TCM),in combination with Western medicine(WM),has made important and lasting contributions in the battle against COVID-19.In this review,updated clinical effects and potential mechanisms of TCM,presented in newly recognized three distinct phases of the disease,are summarized and discussed.By integrating the available clinical and preclinical evidence,the efficacies and underlying mechanisms of TCM on COVID-19,including the highly recommended three Chinese patent medicines and three Chinese medicine formulas,are described in a panorama.We hope that this comprehensive review not only provides a reference for health care professionals and the public to recognize the significant contributions of TCM for COVID-19,but also serves as an evidence-based in-depth summary and analysis to facilitate understanding the true scientific value of TCM.Ming Lyu Guanwei Fan Guangxu Xiao Taiyi Wang Dong Xu Jie Gao Shaoqin Ge Qingling Li Yuling Ma Han Zhang Jigang Wang Yuanlu Cui Junhua Zhang Yan Zhu Boli Zhang 2021Acta Pharmaceutica Sinica B2021,11,11:14
6Entecavir add-on Peg-interferon therapy plays a positive role in reversing hepatic fibrosis in treatment-naive chronic hepatitis B patients: a prospective and randomized controlled trial显示文摘Background:The efficacy of entecavir(ETV)add-on peg-interferon therapy compared with ETV monotherapy in treatment-naive hepatitis B virus(HBV)patients remains controversial.We investigated whether adding peg-interferon to ongoing ETV treatment leads to a better curative effect or not.Methods:All patients have been recruited between August 2013 and January 2015 from the Shanghai Public Health Clinical Center and Zhongshan Hospital(China).Eligible HBV patients(n=144)were randomly divided(1:1)to receive either ETV monotherapy(n=70)or peg-interferon add-on therapy from week 26 to 52(«=74).Patients were followed-up for at least 2 years.Indexes including hepatitis B surface antigen(HBsAg)and hepatitis B e antigen(HBeAg)seroconversion rate,sustained virologic response,transient elastography value,and histological scores were evaluated every 3 months until the end of the study.The rate of patients with HBsAg loss was defined as the primary endpoint criteria.Results:At week 26,no patient achieved HBsAg seroconversion in either group.At week 52,one patient in the monotherapy group was HBsAg-negative but there was none in the combination therapy group.The monotherapy group showed significantly better liver function recovery results than the combination therapy group.At week 78,one patient in the combination group had HBsAg seroconverted.At week 104,only three patients in the combination therapy group were HBsAg-negative compared with one patient in monotherapy.The mean alanine aminotransferase and aspartate aminotransferase levels and transient elastography values decreased significantly compared with baseline.Both groups showed a favorable decrease in alpha-fetoprotein(monotherapy:4.5[2.8,7.1]vs.2.2[1.8,3.1]ng/mL,P<0.001;combination therapy:5.7[3.0,18.8]vs.3.2[2.0,4.3]ng/mL,P<0.001)and an improved result of liver biopsy examination scores.The combination group showed a better improvement in histology compared with the monotherapy group(mean transient elastography value 6.6[4.9,9.8]vs.7.8[5.4,11.1]kPa,P=0.028).But there was no significant difference in HBsAg conversion rate(1.8%[1/56]i^s.4.1%[3/73],P=0.809)and HBeAg conversion rate(12.5%[7/56]i/s.11.0%[8/73],P=0.787),as well as HBV-DNA,sustained virologic response(93.2%vs.98.5%,P=0.150)between the two groups.Conclusions:Both therapies supported liver function recovery and histology improvement.Combination therapy did not show better anti-viral efficacy in HBsAg or HBeAg seroconversion compared with monotherapy.However,combination therapy played a more positive role in reversing hepatic fibrosis compared with monotherapy.Trial registration:ClinicalTrials.gov:NCT02849132;https://clinicaltrials.gov/ct2/show/NCT02849132.Jing-Mao Yang Li-Ping Chen Ya-Jie Wang Bei Lyu Hong Zhao Zhi-Yin Shang Jun Li Zhen-Yu Fan Sheng-Di Wu Xiao Ming Xian Li Shao-Ping Huang Ji-Lin Cheng 2020Chinese Medical Journal2020,,14:11
7First proof-of-principle experiment with the post-accelerated isotope separator on-line beam at BRIF:measurement of the angular distribution of ^(23)Na+^(40)Ca elastic scattering显示文摘The reaction dynamics of exotic nuclei near the drip line is one of the main research topics of current interest.Elastic scattering is a useful probe for investigating the size and surface diffuseness of exotic nuclei.The development of rare isotope accelerators offers opportunities for such studies.To date,many relevant measurements have been performed at accelerators using the projectile fragmentation technique,while the measurements at accelerators using isotope separator on-line(ISOL)systems are still quite scarce.In this work,we present the first proof-of-principle experiment with a post-accelerated ISOL beam at the Beijing Radioactive Ion Beam Facility(BRIF)by measuring the angular distribution of elastic scattering for the stable nucleus^(23)Na from the doubly magic nucleus^(40)Ca at energies above the Coulomb barrier.The angular distribution measured by a silicon strip detector array in a scattering chamber using the ISOL beam at BRIF is in good agreement with that measured by the high-precision Q3 D magnetic spectrograph using the nonISOL beam at nearly the same energy.This work provides useful background for making BRIF a powerful tool for the investigation of the reaction dynamics of exotic nuclei.Wei Nan Bing Guo Cheng-Jian Lin Lei Yang Dong-Xi Wang Yang-Ping Shen Bing Tang Bao-Qun Cui Tao Ge Yin-Long Lyu Hui-Ming Jia Yun-Ju Li Chen Chen Li-Hua Chen Qi-Wen Fan Xin-Yue Li Gang Lian Jian-Cheng Liu Tian-Peng Luo Nan-Ru Ma Rui-Gang Ma Xie Ma Ying-Jun Ma Wei-Ke Nan Dan-Yang Pang You-Bao Wang Pei-Wei Wen Feng Yang Yong-Jin Yao Sheng Zeng Hao Zhang Fu-Peng Zhong Shan-Hao Zhong Zhi-Hong Li Tian-Jue Zhang Wei-Ping Liu BRIF Collaboration 2021Nuclear Science and Techniques2021,32,5:9
8Histopathology of Porcine kobuvirus in Chinese piglets显示文摘Dear Editor,Kobuvirus,classified as a new genus within the Picornaviridae family in 1999,is a non-enveloped virus with single-stranded,positive-sense genomic RNA(Pringle,1999).This genus contains 3 species currently recoganized:Aichivirus A(Ai V),Aichivirus B(BKo V),and Aichivirus C(PKo V).PKo V was first detected inFan Yang Xiaowan Liu Yuancheng Zhou Wenting Lyu Siyao Xu Zhiwen Xu Ling Zhu 2015Virologica Sinica2015,30,5:9
9Zika virus infection induces RNAi-mediated antiviral immunity in human neural progenitors and brain organoids显示文摘The re-emergence of Zika virus(ZIKV)in the Western Hemisphere has resulted in global public health crisis since 2015.ZIKV preferentially infects and targets human neural progenitor cells(hNPCs)and causes fetal microcephaly upon maternal infection.hNPCs not only play critical roles during fetal brain development,but also persist in adult brain throughout life.Yet the mechanism of innate antiviral immunity in hNPCs remains largely unknown.Here,we show that ZIKV infection triggers the abundant production of virus-derived small interfering RNAs in hNPCs,but not in the more differentiated progenies or somatic cells.Ablation of key RNAi machinery components significantly enhances ZIKV replication in hNPCs.Furthermore,enoxacin,a broad-spectrum antibiotic that is known as an RNAi enhancer,exerts potent anti-ZIKV activity in hNPCs and other RNAi-competent cells.Strikingly,enoxacin treatment completely prevents ZIKV infection and circumvents ZIKV-induced microcephalic phenotypes in brain organoid models that recapitulate human fetal brain development.Our findings highlight the physiological importance of RNAi-mediated antiviral immunity during the early stage of human brain development,uncovering a novel strategy to combat human congenital viral infections through enhancing RNAi.Yan-Peng Xu Yang Qiu Boya Zhang Guilai Chen Qi Chen Miao Wang Fan Mo Jiuyue Xu Jin Wu Rong-Rong Zhang Meng-Li Cheng Na-Na Zhang Bao Lyu Wen-Liang Zhu Meng-Hua Wu Qing Ye Da Zhang Jiang-Hong Man Xiao-Feng Li Jie Cui Zhiheng Xu Baoyang Hu Xi Zhou Cheng-Feng Qin 2019Cell Research2019,29,4:8
10Protopanaxadiol derivative DDPU improvesbehaviorand cognitive deficitin AD mice involving regulation of both ER stress and autophagy显示文摘OBJECTIVE To explore the potential effect and mechanisms of protopanaxadiol deriva.tive 1-(3,4-dimethoxyphenethyl)-3-(3-dehydroxyl-20(s)-protopa-naxadiol-3 b-yl)-urea(DDPU) in the treatment of Alzheimer disease.METHODS ELISA assay was performed in both HEK293-APPswe and CHO-APP cells to demonstrate the efficacy of DDPU in reducing Ab level.SH-SY5 Y,primary neurons and astrocyte cellswereused to study the regulation of DDPU against the signaling pathways involved in Aβ/ER-stress pathology.APP/PS1 transgenic mice wereusedto study the regulation of DDPU against ADL and cognitive deficits.APP/PS1 transgenic mice were randomly placed into three groups(n=10):The two 6-month transgenic groups were administrated with 30 mg·kg^(-1) DDPU or vehicle and the 6-month non-transgenic group was administrated with vehicle for 100 days by intraperitonealinjec.tion.After 100-day administration,nest construction assay and Morris water maze(MWM) assay were applied to evaluate the daily living activities and cognitive abilities of the mice with continuous DDPU treatment.Upon completion of behavior assays,mice were euthanized,and the brains were removed and bisected in mid-sagittal plane.The right hemispheres were frozen and stored at-80°C,and the left hemispheres were fixed in 4% paraformaldehyde.RESULTS DDPU effectively improved learning and memory impairments in APP/PS1 transgenic mice,and the underlying mechanisms have been inten.sively investigated.DDPU reduced Ab production by inhibiting the PERK/eIF2 a signaling-mediated BACE1 translation,while promoted Ab clearance as a PI3K inhibitor thus negatively regulating PI3K/AKT/mTOR signaling in promotion of autophagy.Moreover,DDPU also exhibited neuroprotective effect by attenuating ER stress.Therefore,all findings have clearly demonstrated the crosstalk between Ab and ER stress,and confirmed that targeting ER stress should be a potential target for innovative anti-AD drug development,while highlighted the potential of DDPU in the treatment of AD.Xiao-dan Guo Jian-lu LYU Jian LU Lei FAN Xi HUANG Li-hong HU Jia-ying WANG Xu SHEN 2018中国药理学与毒理学杂志2018,32,4:7
11Evaluation of Intraductal Ultrasonography, Endoscopic Brush Cytology and K-ras, P53 Gene Mutation in the Early Diagnosis of Malignant Bile Duct Stricture显示文摘Ping Huang Hao Zhang Xiao-Feng Zhang Xiao Zhang Wen Lyu Zhen Fan 2015Chinese Medical Journal2015,,14:6
12Key determinants of misdiagnosis of tracheobronchial tuberculosis among senile patients in contemporary clinical practice:A retrospective analysis显示文摘BACKGROUND Tracheobronchial tuberculosis(TBTB)is a common subtype of pulmonary tuberculosis.Concomitant diseases often obscure the diagnosis of senile TBTB.AIM To characterize senile patients with TBTB and to identify the potential causes of misdiagnosis.METHODS One hundred twenty patients with senile TBTB who were admitted to the Anhui Chest hospital between May 2017 and May 2019 were retrospectively analyzed.Patients were classified as diagnosed group(n=58)and misdiagnosed group(n=62).Clinical manifestations,laboratory results,radiographic data,and endoscopic findings were compared between the two groups.RESULTS Patients in the misdiagnosed group were most commonly diagnosed as pulmonary tuberculosis(non-TBTB,29/62,46.8%),general pneumonia(9/62,14.5%),chronic obstructive pulmonary disease(8/62,12.9%),and tracheobronchial carcinoma(7/62,11.3%).The time elapsed between disease onset and confirmation of diagnosis was significantly longer in the misdiagnosed group[median(first quartile,third quartile):6.32(4.94,16.02)mo vs 3.73(2.37,8.52)mo].The misdiagnosed group had lower proportion of patients who underwent bronchoscopy[33.87%(21/62)vs 87.93%(51/58)],chest computed tomography(CT)scan[69.35%(43/62)vs 98.28%(57/58)],and those who showed CT signs of tuberculosis[27.91%(12/62)vs 50%(29/58)]as compared to that in the diagnosed group(P<0.05).There were no significant between-group differences with respect to age,gender,occupation,clinical manifestations,or prevalence of comorbid chronic diseases(P>0.05).CONCLUSION Insufficient or inaccurate radiographic or bronchoscopic assessment was the predominant cause of delayed diagnosis of TBTB.Increased implementation and better interpretation of CT scan and early implementation of bronchoscopy can help reduce misdiagnosis of senile TBTB.Fei Tang Lian-Jun Lin Shu-Liang Guo Wei Ye Xian-Kui Zha Yu Cheng Ying-Feng Wu Yue-Ming Wang Xiao-Mei Lyu Xiao-Yun Fan Li-Ping Lyu 2021World Journal of Clinical Cases2021,9,25:6
13Vertical Distribution Characteristics of PM2.5 Observed by a Mobile Vehicle Lidar in Tianjin, China in 2016显示文摘We present mobile vehicle lidar observations in Tianjin, China during the spring, summer, and winter of 2016. Mobile observations were carried out along the city border road of Tianjin to obtain the vertical distribution characteristics of PM_(2.5). Hygroscopic growth was not considered since relative humidity was less than 60% during the observation experiments. PM_(2.5) profile was obtained with the linear regression equation between the particle extinction coefficient and PM_(2.5) mass concentration. In spring, the vertical distribution of PM_(2.5) exhibited a hierarchical structure. In addition to a layer of particles that gathered near the ground, a portion of particles floated at 0.6–2.5-km height. In summer and winter, the fine particles basically gathered below 1 km near the ground. In spring and summer, the concentration of fine particles in the south was higher than that in the north because of the influence of south wind. In winter, the distribution of fine particles was opposite to that measured during spring and summer. High concentrations of PM_(2.5) were observed in the rural areas of North Tianjin with a maximum of 350 μg m–3 on 13 December2016. It is shown that industrial and ship emissions in spring and summer and coal combustion in winter were the major sources of fine particles that polluted Tianjin. The results provide insights into the mechanisms of haze formation and the effects of meteorological conditions during haze–fog pollution episodes in the Tianjin area.Lihui LYU Yunsheng DONG Tianshu ZHANG Cheng LIU Wenqing LIU Zhouqing XIE Yan XIANG Yi ZHANG Zhenyi CHEN Guangqiang FAN Leibo ZHANG Yang LIU Yuchen SHI Xiaowen SHU 2018Journal of Meteorological Research2018,32,1:5
14Epidemiological study and variation analysis of the porcine kobuvirus 3D gene in Sichuan province, China显示文摘Dear Editor,As a member of the Kobuvirus genus in the Picornaviridae family,porcine kobuvirus is prevalent worldwide in pigs with or without diarrhea.Picornaviruses are classified into 12 genera(Aphthovirus,Cardiovirus,Enterovirus,Hepatovirus,Kobuvirus,Parechovirus,Sapelovirus,Avihepatovirus,Erbovirus,Senecavirus,Pengjuan Liu Ping Li Wenting Lyu Xinqiong Li Song Li Fan Yang Jianbo Huang Zhiwen Xu Ling Zhu 2015Virologica Sinica2015,30,6:5
15Treatment of refractory giant macular hole by vitrectomy with internal limiting membrane transplantation and autologous blood显示文摘AIM:To investigate the effect of internal limiting membrane transplantation and autologous blood on treating refractory giant macular hole.METHODS:Thirty-seven eyes with giant macular hole of the smallest hole diameter >700 μm,the maximum diameter of the substrate >1000 μm and hole formation factor <0.6 underwent surgical treatment.The patients were randomly divided into two groups.Nineteen eyes with surgical flip of the internal limiting membrane in group A,18 eyes with internal limiting membrane transplantation in group B who underwent the tamponade of internal limiting membrane into the hole,autologous plasma was used to seal the hole.The patients were followed up for 3 mo,optical coherence tomography and best corrected visual acuity(BCVA) were recorded before and after operation,and the results were statistically analyzed.RESULTS:At 3 mo after operation,BCVA of the two groups was significantly improved compared with that before operation(tA=4.192,tB=4.374,P<0.05).But there was no significant difference in visual acuity between the two groups(χ~2=0.128,P>0.05).At 3 mo after operation,the closure rate of group A was 68.4%,and 100% in group B.(χ~2=5.628,P<0.05).The defect diameter of inner segment/outer segment at 3 mo after the operation was significantly lower than that before operation(t_A=12.287,t_B=15.481,P<0.05),and the difference was statistically significant(t=2.552,P<0.05).CONCLUSION:Internal limiting membrane transplantation combined with autologous whole blood can improve the postoperative closure rate of the refractory large aperture,and can effectively improve the postoperative visual acuity.Wen-Juan Lyu Lei-Bing Ji Yun Xiao Yin-Bo Fan Xue-Hong Cai 2018International Journal of Ophthalmology(English edition)2018,11,5:5
16Outcome of the efficacy of Chinese herbal medicine for functional constipation:A systematic review and meta-analysis显示文摘BACKGROUND Functional constipation(FC)is a common and chronic gastrointestinal disease and its treatment remains challenging.AIM To evaluate the efficacy and safety of Chinese herbal medicine(CHM)on efficacy rate,global symptoms,bowel movements and the Bristol Stool Scale score in patients with FC by summarizing current available randomized controlled trials(RCTs).METHODS RCTs with CHM to treat FC were identified by a systematic search of six databases from inception to October 20,2020.Two independent reviewers assessed the quality of the included articles and extracted data.Meta-analyses were performed to odds ratio(OR),mean differences(MD)and 95%confidence interval(CI)using random-effects models.Subgroup analyses and sensitivity analyses were used to explore and interpret the sources of heterogeneity.The funnel plot,Begg’s test and Egger’s test were used to detect publication bias.RESULTS Ninety-seven studies involving 8693 patients were included in this work.CHM was significantly associated with a higher efficacy rate(OR:3.62,95%CI:3.19-4.11,P<0.00001)less severe global symptoms(OR:4.03,95%CI:3.49-4.65,P<0.00001)compared with control treatment,with the low heterogeneity between studies(I2=0%,P=0.76).CHM was also associated with more frequent bowel movements(MD 0.83,95%CI:0.67-0.98,P<0.00001),a lower score on the Bristol Stool Scale(OR:1.63,95%CI:1.15-2.32,P<0.006),and a not significant recurrence rate(OR:0.47,95%CI:0.22-0.99,P=0.05).No serious adverse effects of CHM were reported.CONCLUSION In this meta-analysis,we found that CHM may have potential benefits in increasing the number of bowel movements,improving stool characteristics and alleviating global symptoms in FC patients.However,a firm conclusion could not be reached because of the poor quality of the included trials.Further trials with higher quality are required.Zipan Lyu Yibo Fan Yang Bai Tao Liu Linda LD Zhong Hui-Feng Liang 2022World Journal of Clinical Cases2022,10,15:4
17Spatial Analysis of People Living with HIV/AIDS Transmitted Through Commercial Heterosexual Contact or Non-Marital Non-Commercial Heterosexual Contact—China,2018显示文摘Summary What is already known about this topic?Significant changes in human immunodeficiency virus(HIV)transmission modes have occurred in China,and the proportion of heterosexual transmission increased in recent years.What is added by this report?The proportions of diverse transmission routes and subgroups of heterosexual transmission were analyzed by provincial-level administrative divisions(PLADs).Zhilong Dong Xiaohong Pan Chang Cai Qianqian Qin George F.Gao Fan Lyu 2021China CDC weekly2021,3,15:3
18Multi-label Image Classification via Coarse-to-Fine Attention显示文摘Great efforts have been made by using deep neural networks to recognize multi-label images.Since multi-label image classification is very complicated,many studies seek to use the attention mechanism as a kind of guidance.Conventional attention-based methods always analyzed images directly and aggressively,which is difficult to well understand complicated scenes.We propose a global/local attention method that can recognize a multi-label image from coarse to fine by mimicking how human-beings observe images.Our global/local attention method first concentrates on the whole image,and then focuses on its local specific objects.We also propose a joint max-margin objective function,which enforces that the minimum score of positive labels should be larger than the maximum score of negative labels horizontally and vertically.This function further improve our multi-label image classification method.We evaluate the effectiveness of our method on two popular multi-label image datasets(i.e.,Pascal VOC and MS-COCO).Our experimental results show that our method outperforms state-of-the-art methods.LYU Fan LI Linyan Victor S.Sheng FU Qiming HU Fuyuan 2019Chinese Journal of Electronics2019,28,6:3
19Self-assembly and Properties of Block Copolymers Containing MesogenJacketed Liquid Crystalline Polymers as Rod Blocks显示文摘Mesogen-jacketed liquid crystalline polymer(MJLCP) has attracted great attention because of its rigid conformation, facile synthesis, and structural controllability. In this feature article, the self-assembly of MJLCP-based block copolymers(BCPs) is briefly reviewed, especially the nanostructures of rod-coil diblock copolymers(di BCPs), rod-rod di BCPs, and triblock copolymers. In addition,the properties of the self-assembled BCPs are also summarized, including their applications as liquid crystalline thermoplastic elastomers and solid polymer electrolytes. The article also discusses the major challenges and future directions in the study of MJLCP-based BCPs.Xiao-Lin Lyu Hong-Bing Pan Zhi-Hao Shen Xing-He Fan 2018Chinese Journal of Polymer Science2018,36,7:2
20Decreases in Both the Seroprevalence of Serum Antibodies and Seroprotection against Japanese Encephalitis Virus among Vaccinated Children显示文摘The incidence of Japanese encephalitis(JE)has significantly decreased in China due to JE vaccines.In this study,we investigated the post-JE vaccination seroprevalence and protection provided by vaccinated sera against Japanese encephalitis virus(JEV)to elucidate the persistence and waning of antibodies to JEV among JE-SA14-14-2-vaccinated children.A total of 300 serum samples were collected from vaccinated children aged 3-10 years in Zhaotong,Yunnan,China.The seroprevalence of anti-JEV antibodies was determined by enzyme-linked immune sorbent assay and plaque reduction neutralization test.The highest seropositivity of 82%was observed in vaccinated children during the first 0.5-1.5 years after booster vaccination.Then,the seropositivity began to decline and remained lower than the original level observed in the 0.5-1.5-year group.An association was found between the waning of seroprevalence and elapsed time of the post-booster vaccination.Similarly,the neutralizing antibody(nAb)titres gradually decreased over time,and the levels showed a positive correlation with the protective efficacy in mice.This finding suggests that nAbs play an important role in the antiviral process and that the nAb titre is an adequately credible parameter for evaluating the protective efficacy induced by the JE vaccine.Our results provide data that clarify the persistence and waning of antibodies to JEV,which may help elucidate the pathogenesis of JE.Ran Wang Lyu Xie Na Gao Dongying Fan Hui Chen Peigang Wang Hongning Zhou Jing An 2019Virologica Sinica2019,34,3:2
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