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A Weakly-Supervised Crowd Density Estimation Method Based on Two-Stage Linear Feature Calibration

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IEEE/CAA Journal of Automatica Sinica 2024年第4期11卷 965-981页

作者： Yong-Chao Li Rui-Sheng Jia Ying-Xiang Hu hong-mei sun the College of Computer Science and Engineering Shandong University of Science and TechnologyQingdao 266590 the Faculty of Information Science and Engineering Ocean University of ChinaQingdao 266000China the College of Computer Science and Engineering Shandong University of Science and TechnologyQingdao 266590China the College of Computer Science and Engineering Nanjing University of Science and TechnologyNanjing 210000China

In a crowd density estimation dataset,the annotation of crowd locations is an extremely laborious task,and they are not taken into the evaluation *** this paper,we aim to reduce the annotation cost of crowd datasets,and propose a crowd density estimation method based on weakly-supervised learning,in the absence of crowd position supervision information,which directly reduces the number of crowds by using the number of pedestrians in the image as the supervised *** this purpose,we design a new training method,which exploits the correlation between global and local image features by incremental learning to train the ***,we design a parent-child network(PC-Net)focusing on the global and local image respectively,and propose a linear feature calibration structure to train the PC-Net simultaneously,and the child network learns feature transfer factors and feature bias weights,and uses the transfer factors and bias weights to linearly feature calibrate the features extracted from the Parent network,to improve the convergence of the network by using local features hidden in the crowd *** addition,we use the pyramid vision transformer as the backbone of the PC-Net to extract crowd features at different levels,and design a global-local feature loss function(L2).We combine it with a crowd counting loss(LC)to enhance the sensitivity of the network to crowd features during the training process,which effectively improves the accuracy of crowd density *** experimental results show that the PC-Net significantly reduces the gap between fullysupervised and weakly-supervised crowd density estimation,and outperforms the comparison methods on five datasets of Shanghai Tech Part A,ShanghaiTech Part B,UCF_CC_50,UCF_QNRF and JHU-CROWD++.

关键词： Crowd density estimation linear feature calibration vision transformer weakly-supervision learning

A New Humidity-Sensitive Material Based on PPBT Prepared with Palladium Complex Catalyst

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Chinese Chemical Letters 2000年第12期11卷 1097-1100页

作者： hong mei sun Mu Jie YANG Ming Fang LING Department of Chemistry and Chemical Engineering Suzhou UniversitySuzhou 215006 Department of Polymer Science and Engineering Zhejiang UniversityHangzhou 310027 Department of Information and Electronics Zhejiang UniversityHangzhou 310027

Soluble Poly(propargyl benzoate) (PPBT) with pi -conjugated structure was synthesized using a novel bis(triphenylphosphine)-bisacetylide palladium complex catalyst [Pd(PPh3)(2)(C equivalent to CCH2OOCPh)(2)] (PPB). An interdigital gold electrode was covered by screen printing films of doped PPBT (DPPBT) to prepare a resistance-type humidity sensor, which exhibits electrical response towards relative humidity (RH%) variations in the range 11%-96%. PPBT shows promise as a new humidity-sensitive material.

关键词： humidity-sensitive materials poly(propargyl benzoate) bis(triphenylphosphine)-bis-acetylide palladium complex resistance-type humidity sensor

Dynamic Development of Aphelenchoides besseyi on Rice Plant by Artificial Inoculation in the Greenhouse

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Agricultural Sciences in China 2008年第8期7卷 970-976页

作者： LIU Wei-hong LIN Mao-song LI hong-mei sun Min-jie Plant Protection College Nanjing Agricultural University Nanjing 210095 P.R.China

A study was done on the relationship between Aphelenchoides besseyi and the symptoms of small grains and erect panicles. This is an important rice disease in Jiangsu Province, China. A. besseyi was extracted from small grains and erect panicles and cultured artificially, and then inoculated into bud and leaf sheaths of seedlings of two Oryza sativa cultivars, namely Zhendao 2 and Wuyunjing 7 in a greenhouse. The effect on rice growth, in particular the small grains and erect panicles, was revealed by the extent of the disease, seed expansion stages, nematode load, and nematode mortality. In contrast to healthy seedlings, the height, length, and the numbers of spikelets of unhealthy panicles of Zhendao 2 were decreased by 6.7, 16.4, and 13.5%, respectively. Before anthesis, nematodes were attracted to the leaf sheath and apical meristem, nematode load increased by 40%; after anthesis, nematodes occurred in spikelets principally and the number increased by 90.8%. The percentages of infected seeds and nematode load were highest in plump seeds and lowest in empty seeds. Nematode mortality on grain with normal endosperm was lower than seeds with abnormal endosperm. Results indicated that A. besseyi was the pathogen in rice with the symptoms of small grains and erect panicles. Wuyunjing 7 manifests only the small grains and erect panicles symptoms and not the symptoms of leaf white-tip. These symptoms of small grains and erect panicles are new symptom records for the disease caused by A. besseyi on rice.

关键词： Aphelenchoides besseyi small grains and erect panicles nematode distribution seed expansion nematodemortality

Melatonin regulates lily bulblet development through the LoBPM3- LoRAV module

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Ornamental Plant Research 2022年第1期2卷 123-133页

作者： Liang sun Sheng-li Song Yue Yang hong-mei sun Key Laboratory of Protected Horticulture of Education Ministry College of HorticultureShenyang Agricultural UniversityShenyang 110161China National and Local Joint Engineering Research Center of Northern Horticultural Facilities Design and Application Technology Shenyang nullChina

Melatonin regulates lily bulblet development;however,the key interactions have not yet been *** this study,we found that adding 20μM melatonin to the growth medium increased the bulblet circumference and the trehalose and starch ***,the expression of numerous genes involved in cell proliferation and carbohydrate accumulation were *** analysis showed that melatonin downregulated the expression of LoRAV and upregulated the expression of LoBPM3 at an early *** and bioinformatics analysis showed that LoRAV is 1056 bp in length and encodes a protein with two structural domains,namely,AP2 and B3;the encoded protein is localized to the nucleus and has no self-activation activity,and this protein interacts with *** expression of LoTCP4 and LoAMY was upregulated,while the expression of LoAGPase,LoCYCB2-1,and LoPCNA was inhibited when LoRAV was transiently ***,the trends in the expression of the genes mentioned above,except LoAGPase and LoAMY,were reversed when LoRAV-OE was treated with ***,the expression of LoRAV,LoTCP4 and LoAMY was inhibited,and the expression of LoCYCB2-1 was upregulated by transient overexpression of LoBPM3,but the expression of LoBPM3 was not regulated by LoRAV *** on these data,we suggest that melatonin promoted bulb development,which was partly associated with regulation of the LoBPM3-LoRAV module;thus,LoRAV negatively regulates cell proliferation of bulblets,and LoBPM3 is located upstream of LoRAV and attenuates its expression.

关键词： expression inhibited Melatonin

Intrauterine Infections and Birth Defects

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Biomedical and Environmental Sciences 2004年第4期17卷 476-491页

作者： XIAO-YING ZHENG TING ZHANG YI-FEI WANG CHEN XU GONG CHEN RuO-LEI XIN JIA-PENG CHEN XU-mei HU QING YANG XIN-MING SONG LI-HUA PANG YING JI hong-mei sun LEI ZHANG JU-FEN LIU YAN-LING GUO YAN ZHANG Institute of Population Research／WHO Collaborating Centeron Reproductive Health and Population Science Beijing 100871China Department of Infection and Immunity Capitallnstimte of PediatricsBeijing 100020China Medical School of Shanghai Jiatong University No.1954Huashan RoadShanghai 200030China Department of Embryology the Second Medical UniversityNo.280Chongqing NanluShanghai 200025China

Intrauterine infection is an important cause of some birth defects worldwide. The most common pathogens include rubella virus, cytomegaloviurs, ureaplasma urealyticum, toxoplasma, etc. General information about these pathogens in epidemiology, consequence of birth defects, and the possible mechanisms in the progress of birth defects, and the interventions to prevent or treat these pathogens?infections are described. The infections caused by rubella virus, cytomegaloviurs, ureaplasma urealyticum, toxoplasma, etc. are common, yet they are proved to be fatal during the pregnant period, especially during the first trimester. These infections may cause sterility, abortion, stillbirth, low birth weight, and affect multiple organs that may induce loss of hearing and vision, even fetal deformity and the long-term effects. These pathogens?infections may influence the microenvironment of placenta, including levels of enzymes and cytokines, and affect chondriosome that may induce the progress of birth defect. Early diagnosis of infections during pregnancy should be strengthened. There are still many things to be settled, such as the molecular mechanisms of birth defects, the effective vaccines to certain pathogens. Birth defect researches in terms of etiology and the development of applicable and sensitive pathogen detection technology and methods are imperative.

关键词： Pregnancy Complications Infectious Pregnancy Outcome Abnormalities Animals Female Humans Infant Newborn Placenta Diseases Pregnancy Pregnancy Trimester First Research Support Non-U.S. Gov't Rubella Toxoplasma Ureaplasma urealyticum

Induction of CRMP-4 in striatum of adult rat after transient brain ischemia

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Acta Pharmacologica Sinica 2003年第12期24卷 31-37页

作者： LIU Peng-Chong YANG Zeng-Jin QIU mei-hong, ZHANG Ling-mei, sun Feng-Yan National Laboratory of Medical Neurobiology, Fudan University Shanghai Medical College, Shanghai 200032, China National Laboratory of Medical Neurobiology Fudan University Shanghai Medical College Shanghai 200032 Chin

AIM: To study the expression of collapsing response mediated protein-4 (CRMP-4) and nestin in the ischemic adult rat brain following transient brain ischemia. METHODS: Brain ischemia was induced by transient left middle cerebral artery occlusion (MCAO) for 60 min in adult rats. The expression of CRMP-4, nestin and bromodeoxyuridine (BrdU) was analyzed by immunohistochemical method. The co-localization of CRMP-4 and nestin or BrdU was analyzed by double staining combined with confocal laser scanning microscopy. RESULTS: CRMP-4, a marker of immature neuron, could be expressed in the ipsilateral striatum and cerebral cortex at 1st and 2nd week after the ischemia-reperfusion; nestin, a marker of neural stem cell, occurred in above regions from several hours to 2 weeks. CRMP-4 costained with nestin and with BrdU incorporation. CONCLUSION: Neural stem cells may present in the striatum and cerebral cortex of adult rat and can be triggered to differentiate into newborn neuron there by ischemic brain trauma.

关键词： brain ischemia corpus striatum CRMP-4 protein intermediate filament proteins bromodeoxyuridine neurons regeneration

Bacteriological and electron microscopic examination of primary intrahepatic stones

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Hepatobiliary & Pancreatic Diseases International 2006年第2期5卷 228-231页

作者： Shuo-Dong Wu, hong Yu and Ji-mei sun Department of General Surgery Department of Microbiology Center Second Affiliated Hos- pital China Medical University, Shenyang 110004, China Department of General Surgery Second Affiliated Hospital (Shengjing Hospital) China Medical University Shenyang 110004 China. wushuodong@***

BACKGROUND: Primary intrahepatic cholelithiasis is usually combined with biliary tract infection. This research was undertaken to investigate the relationship between intrahepatic stones and biliary tract infection. METHODS: Thirty-five bile samples and 30 stones specimens were cultured for bacteria and 12 stones specimens were examined with a scan electron microscope (SEM) or a transmission electron microscope (TEM). RESULT: 94.2% bile samples and 96.7% stones specimens were positive in bacteria culture. Bacteria were found in stones under SEM and TEM. CONCLUSION: Bacteria in stones are associated with the infection of the biliary tract.

关键词： cholelithiasis bacteria scan electron microscope transmission electron microscope biofilm

Application of Computed Tomography Virtual Noncontrast Spectral Imaging in Evaluation of Hepatic Metastases： A Preliminary Study

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Chinese Medical Journal 2015年第5期128卷 610-614页

作者： Shi-Feng Tian Ai-Lian Liu Jing-hong Liu mei-Yu sun He-Qing Wang Yi-Jun Liu Department of Radiology First Affiliated Hospital of Dalian Medical University Dalian Shenyang 116011 China

Objective：The objective was to qualitatively and quantitatively evaluate hepatic metastases using computed tomography （CT） virtual noncontrast （VNC） spectral imaging in a retrospective ***：Forty hepatic metastases patients underwent CT scans including the conventional true noncontrast （TNC） and the tri-phasic contrast-enhanced dual energy spectral scans in the hepatic arterial,portal venous,and equilibrium *** tri-phasic spectral CT images were used to obtain three groups of VNC images including in the arterial （VNCa）,venous （VNCv）,and equilibrium （VNCe） phase by the material decomposition process using water and iodine as a base material *** image quality and the contrast-to-noise ratio （CNR） of metastasis of the four groups were compared with ANOVA *** metastasis detection rates with the four nonenhanced image groups were calculated and compared using the Chisquare ***：There were no significant differences in image quality among TNC,VNCa and VNCv images （P 〉 0.05）.The quality of VNCe images was significantly worse than that of other three groups （P 〈 0.05）.The mean CNR of metastasis in the TNC and VNCs images was 1.86,2.42,1.92,and 1.94,respectively; the mean CNR of metastasis in VNCa images was significantly higher than that in other three groups （P 〈 0.05）,while no statistically significant difference was observed among VNCv,VNCe and TNC images （P 〉 0.05）.The metastasis detection rate of the four nonenhanced groups with no statistically significant difference （P 〉 0.05）.Conclusions：The quality of VNCa and VNCv images is identical to that of TNC images,and the metastasis detection rate in VNC images is similar to that in TNC *** images obtained from arterial phase show metastases more ***,VNCa imaging may be a surrogate to TNC imaging in hepatic metastasis diagnosis.

关键词： Contrast-to-noise Ratio Hepatic Metastasis Virtual Noncontrast Imaging

Exploration of a reasonable dialysate temperature setting in hemodialysis for patients with hypertension

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Chinese Nursing Research 2016年第3期3卷 133-136页

作者： Lin-Fang Xu Chun-Lei Wu hong-mei sun Tong-Qiang Liu Yanghu Branch Changzhou No.2 People's Hospital

Objective：This study aims to investigate the effect of 4 different dialysate temperatures on blood pressure during hemodialysis for patients with ***：Using a self-controlled method,the patients＇ body temperature was set as ***,the dialysate temperature was set as 37 ℃,T＋0.5 ℃,T,and T-0.5 ℃.The changes in blood pressure,heart rate,mean arterial pressure and dialysis-induced adverse reactions at the 4 different dialysate temperatures were consistently ***：Patients who received hemodialysis with 37 ℃ and T＋0.5 ℃ dialysate demonstrated an unstable blood pressure and a higher incidence of adverse reactions,Patients who received hemodialysis with T and T-0.5 ℃ dialysate showed a relatively stable blood pressure,heart rate,and mean arterial pressure during *** particular,dialysate at T-0.5 ℃ resulted in the most stable blood pressure,the fewest adverse reactions and the best self-assessed comfort scores（P 〈 0.01）.Conclusions：The dialysate temperature during hemodialysis for patients with hypertension should be set to a temperature based on patients＇ preoperative body temperate T or 0.5 ℃ below *** practice is suggested to enhance the stability of patients＇ blood pressure and heart rate during hemodialysis,reduce complications and improve patients＇ tolerance of hemodialysis.

关键词： Hemodialysis Hypertension Dialysate Temperature Blood pressure