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高电导率抗冻离子凝胶的制备及性能研究

材料导报 2024年第S1期38卷 522-528页

作者：熊杰焘何荣祥曹一平江汉大学光电材料与技术学院武汉430056

近年来,可穿戴设备在人体运动、身体体征以及体液检测等方面得到广泛应用。离子凝胶依靠其优异的离子导电性、热稳定性和电化学性能,广泛应用于柔性传感器,包括传感单元和柔性电极。大多数可穿戴传感器对低温条件的适应度不高,这阻碍了... 详细信息

近年来,可穿戴设备在人体运动、身体体征以及体液检测等方面得到广泛应用。离子凝胶依靠其优异的离子导电性、热稳定性和电化学性能,广泛应用于柔性传感器,包括传感单元和柔性电极。大多数可穿戴传感器对低温条件的适应度不高,这阻碍了其在不同环境下的使用。鉴于此,本工作提出了一种高电导率抗冻离子凝胶,将丙烯酸(AA)、羧甲基纤维素钠(CMC)、丙烯酰胺(AAm)三种物质以AA与CMC,AA与AAm,AA、CMC和AAm三种组合相互形成共聚网络,并加入LiCl导电物质来制备一种在低温下依旧能保持良好电化学性能的离子凝胶。在三种类型的离子凝胶中,AA-CMC离子凝胶具有最高的电导率和对金属类器件表面最好的粘附性,对铁片的最大粘附力可达51.39 kPa,同时还具有优良的保湿抗冻功能(在25℃下7 d内失水率仅为4%以及-76℃的凝固点)和207.10%的断裂生长率。AA-CMC离子凝胶具有较好的导电性能(电导率最大为0.617 S/m)及柔软特性,可以组装成可穿戴柔性压力传感器;具有稳定的电化学性能且在长期在低温下也能保持自身的导电性能(-18℃冷冻3周电导率保持约原有的86.3%)。本工作所制备AA-CMC的离子凝胶将有望扩展其在柔性电子设备中的应用范围与使用前景。

关键词：离子凝胶抗冻保湿丙烯酰胺羧甲基纤维素钠柔性传感器

A METHOD OF LEUKOCYTE SEGMENTATION BASED ON S COMPONENT AND B COMPONENT IMAGES

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Journal of Innovative Optical Health Sciences 2014年第1期7卷 83-90页

作者： yiping YANG yiping cao WENXIAN SHI Department of Optical Electronics Sichuan University Chengdu Sichuan 610064P.R.China

A leukocyte segmentation method based on S component and B component images is *** segmentation operation is applied to get two binary images in S component and B component *** samples used in this study are peripheral blood *** is easy tofind from the two binary images that gray values are the same at every corresponding pixels in theleukocyte cytoplasm region,but opposite in the other *** feature shows that "IMAGEAND"operation can be employed on the two binary images to segment the cytoplasm region *** doing"IMAGE XOR"operation between cytoplasn region and nucleus region,theleukocyte segment ation can be retrieved *** segmentation accuracy is evaluated by comparing the segmentation result of the proposed method with the manual segmentation by *** results show that the proposed method is of a higher segmentationaccuracy and it also performs well when leukocytes overlap_with *** averagesegmentation accuracy of the proposed method reaches 97.7%for segmenting five types *** segmentation results provide an important foundation for leukocytes aut omaticrecognition.

关键词： Image segmentation leukocyte component image B component image

Automatic counting method for complex overlapping erythrocytes based on seed prediction in microscopic imaging

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Journal of Innovative Optical Health Sciences 2016年第5期9卷 48-56页

作者： Xudong Wei yiping cao Department of Optical Electronics Sichuan University ChengduSichuan 610064P.R.China

Blood cell counting is an important medical test to help medical staffs diagnose various symptoms and *** automatic segmentation of complex overlapping erythrocytes based on seed prediction in microscopic imaging is *** four main innovations of this ressearch are ***:(1)Regions of erythrocytes extracted rapidly and accurately based on the G component.(2)K-means algorithm is applied on edge detection of overlapping erythrocytes.(3)Traces of erythrocytes'biconcave shape are utilized to predict erythrocyte's position in overlapping clus-ters.(4)A new automatic counting method which aims at complex overlapping erythrocytes is *** experimental results show that the proposed method is efficient and accurate with very little running *** average accuracy of the proposed method reaches 97.0%.

关键词： Image segmentation erythrocyte cell counting k-means seed prediction

A Leukocyte image fast scanning based on max–min distance clustering

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Journal of Innovative Optical Health Sciences 2016年第6期9卷 50-57页

作者： Yapin Wang yiping cao Department of Optical Electronics Sichuan University Chengdu Sichuan 610064 P.R.China

A leukocyte image fast scanning method based on max min distance clustering is *** of the lower proportion and uneven distribution of leukocytes in human peripheral blood,there will not be any leukocyte in lager quantity of the captured images if we directly scan the blood smear along an ordinary zigzag scanning routine with high power(100^(x))*** to the larger field of view of low power(10^(x))objective,the captured low power blood smear images can be used to locate *** of the located positions make up a specific routine,if we scan the blood smear along this routine with high power objective,there will be definitely leukocytes in almost all of the captured *** the number of captured images is still large and some leukocytes may be redundantly captured twice or more,a leukocyte clustering method based on max-min distance clustering is developed to reduce the total number of captured images as well as the number of redundantly captured *** method can improve the scanning eficiency *** experimental results show that the proposed method can shorten scanning time from 8.0-14.0min to 2.54.0 min while extracting 110 nonredundant individual high power leukocyte images.

关键词： Leukocyte image fast scanning scanning routine max-min distance clustering window clustering microscopic imaging image segmentation

A robust automatic leukocyte recognition method based on island-clustering texture

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Journal of Innovative Optical Health Sciences 2016年第1期9卷 64-76页

作者： Xiaoshun Li yiping cao Department of Optical Electronics Sichuan University Chengdu Sichuan 610064P.R.China

A leukocyte recognition method for human peripheral blood smear based on island-clustering texture(ICT)is *** analyzing the features of the five typical classes of leukocyte images,a new ICT model is ***,some feature points are extracted in a gray leukocyte image by mean-shift clustering to be the centers of ***,the growing region is employed to create regions of the islands in which the seeds are just these feature *** islands distribution can describe a new ***,a distinguished parameter vector of these islands is created as the ICT features by combining the ICT features with the geometric features of the *** the five typical classes of leukocytes can be recognized successfully at the correct recognition rate of more than 92.3%with a total sample of 1310 *** results show the feasibility of the proposed *** analysis reveals that the method is robust and results can provide important information for disease diagnosis.

关键词： Image processing leukocyte recognition texture analysis island-clustering texture

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澳门地区校外补习社:治理体系、特点和经验

世界教育信息 2024年第8期37卷 72-80页

作者：徐光木曹怡萍湖北师范大学经济管理与法学院黄石435002

我国澳门地区中小学生在学校规定基准下,因无法达标而被迫留级的情况并不罕见。为避免在未来的升学竞争中被过早淘汰,澳门地区学生从学前开始就被家长送到校外补习,校外补习社因而迅速发展壮大。20多年来,澳门特别行政区在校外补习社治... 详细信息

我国澳门地区中小学生在学校规定基准下,因无法达标而被迫留级的情况并不罕见。为避免在未来的升学竞争中被过早淘汰,澳门地区学生从学前开始就被家长送到校外补习,校外补习社因而迅速发展壮大。20多年来,澳门特别行政区在校外补习社治理方面进行积极探索,相继颁布一系列法律法规,将校外补习社纳入政府监管范畴,形成了较为完善的治理体系。我国澳门地区校外补习社治理呈现出治理手段法治为先、治理格局一主多辅、治理范围与时俱进的特点。其治理经验可概括为政府主导是有效治理的力量保障,问题导向是提质增效的方向保障,刚柔并济是完善治理的关键密钥,社会参与是加强治理的有效手段。

关键词：澳门特别行政区补习社校外培训治理经验

A fast auto-focusing method of microscopic imaging based on an improved MCS algorithm

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Journal of Innovative Optical Health Sciences 2015年第5期8卷 67-76页

作者： Guangkai Fu yiping cao Mingteng Lu Department of Optical Electronics Sichuan University Chengdu 610064P.R.China

An improved"three steps"mountain-climb searching(MCS)algorithm is proposed which is applied to auto-focusing for microscopic imaging accurately and *** analyzing the performance of several evaluation functions,the variance function and the Brenner function are synthesized as a new evaluation *** the first step,a self-adaptive step length which is much dependent on the reciprocal of the evaluation function value at the beginning position of climbing is used for approaching the halfway up the mountain ***,a fixed moderate step length is applied for approaching the mountaintop of the variance function as closer as ***,afine step is employed for reaching the exact mountaintop of the Brenner *** microscope auto-focusing experiments based on the proposed algorithm for blood smear detection have been carried out *** results show that the improved algorithm can not only guarantee the precision to get clear focal images,but also improve the auto-focusing e±ciency.

关键词： Auto-focusing evaluation function mountain-climb searching algorithm image processing

An online identity authentication method for blood smear

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Journal of Innovative Optical Health Sciences 2016年第6期9卷 1-11页

作者： Xiaozhen Feng yiping cao Kuang Peng Cheng Chen Department of Optical Electronics Sichuan University Chengdu Sichuan 610064P.R.China

Blood smear test is the basic method of blood cytology and is also a standard medical test that can help diagnose various conditions and *** examination is the gold stan-dard to determine pathological changes in blood cell *** the biology and medicine automation trend,blood smears'automated management and analysis is very *** online blood smear automatic microscopic image detection system has been *** includes an online blood smear automatic producing part and a blood smear automatic micro-scopic image detection *** identity authentication is at the core of the *** identifiers printed online always present dot matrix digit code(DMDC)whose stroke is not *** the particularities of DMDC and the complexities of online application environment,an online identity authentication method for blood smear with heterological theory is *** synthesizing the certain regional features according to the heterological theory,high identification accuracy and high speed have been guaranteed with few features *** the experiment,the suficient correct matches bet ween the tube barcode and the identification result verified its feasibility and validity.

关键词： Blood smear digit identification identity authentication feature identification blood smear detection microscopic imaging

Experiments and simulations of gas-solid flow in an airlift loop reactor

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Particuology 2011年第2期9卷 130-138页

作者： Chaoyu Yan Chunxi Lu yiping Fan Rui cao Yansheng Liu State Key Laboratory of Heavy Oil Processing China University of Petroleum Beijing 102249 China

The hydrodynamics in a gas-solid airlift loop reactor was investigated systematically using experimental measurements and CFD simulation. In the experiments, the time averaged parameters, such as solid frac- tion and particle velocity, were measured by optical fiber probe. In the simulation, the modified Gidaspow drag model accounting for the interparticles clustering was incorporated into the Eulerian-Eulerian CFD model with particulate-phase kinetic theory. Predicted values of solid fraction and particle velocity were compared with experimental results, validating the drag model and the simulation. The results show that the profiles of particle velocity and solid fraction are uniform in annulus. However, the core-annulus structure appears in other three regions （draft tube region, bottom region and particle diffluence region）, which presents the similar heterogeneous feature of aggregative fluidization usually occurred in nor- mal fiuidized beds. Simulated profiles of particle residence time distribution indicate that the airlift loop reactor should be characterized by near perfect mixing.

关键词： Airlift loop FeactoFHydrodynamicsGas-solid two phases flowCFDDrag force model