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Multi-materials drop-on-demand inkjet technology based on pneumatic diaphragm actuator

Science china(Technological Sciences) 2010年第6期53卷 1605-1611页

作者： XIE Dan1,2,ZHANG HongHai1,2,SHU XiaYun1,2,Xiao JunFeng1,2 & CAO Shu1,2 1Institute of Micro-Systems,School of Mechanical Science and Engineering,Huazhong University of Science and Technology,wuhan 43.074,china 2wuhan national laboratory for optoelectronics,wuhan 43.074,china Institute of Micro-Systems School of Mechanical Science and Engineering Huazhong University of Science and Technology wuhan national laboratory for optoelectronics

Micro-droplet jetting belongs to the field of precision fluid dispensing *** traditional subtraction manufacture process,micro-droplet jetting as an additive fabrication technique with features of non-contact and data-driven represents a new development trend of modern manufacturing *** this paper,the design,fabrication and performance of a multi-materials drop-on-demand (DOD) inkjet system based on pneumatic diaphragm actuator were *** capturing the droplet ejection process and measuring the droplet dimension,a self-made in situ imaging system based on time delayed external trigger was set *** performance of the generator was studied by adjusting the structure and control ***,the influence of fluid properties on the droplet ejection process was experimentally ***-solderballs of 160.5 μm in diameter and UV curing adhesive micro-bumps of 346.94 μm in contact diameter with the substrate were *** results demonstrated that the DOD inkjet generator possesses characteristics of robust,easy to operate and maintain,and able to withstand high temperature as well as applicability to a wide variety of materials including polymers,low melting point resin and high melting point *** system has a great potential of being used in the fields of IC and MEMS packaging,3D printing,organic semiconductor fabrication,and biological and chemical analysis.

关键词： micro-droplet jetting drop on demand pneumatic diaphragm actuator multi-materials

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Numerical simulations and experimental investigations on transverse effects of two-wave mixing in a photovoltaic photorefractive crystal

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Science china(Physics,Mechanics & Astronomy) 2010年第5期53卷 856-863页

作者： CAI Xin1,2,LIU JinSong1 & WANG ShengLie1 1 wuhan national laboratory for optoelectronics,School of Optoelectronic Science and Engineering,Huazhong University of Science and Technology,wuhan 43.074,china 2 School of Science,wuhan University of Technology,wuhan 430070,china wuhan national laboratory for optoelectronics School of Optoelectronic Science and Engineering Huazhong University of Science and Technology Wuhan 430074 China

The transverse effects of two Gauss waves mixing in a photovoltaic photorefractive crystal,i.e.,the dynamical evolutions of signal beam with different parameters,are traced numerically and *** the one-dimensional numerical simulations and two-dimensional experimental investigations show that the self-focusing effect of signal beam becomes more obvious as the intensity of pump beam and the angle between the signal and pump beams *** accordance with these results,the state of two Gaussian waves mixing is controllable.

关键词： numerical simulation experimental investigation two-wave mixing transverse effects Gaussian distribution

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Real-World Treatment Adherence to Smoking Cessation Medications and Association with Treatment Outcome—27 Centers,china,2017–2022

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china CDC weekly 2024年第22期6卷 522-529,I0001-I0003页

作者： Anqi Cheng Zhao Liu Xinmei Zhou Zheng Su Dan Xiao Chen Wang the china national Tobacco Cessation Cohort Study(CNTCCS)Study Group Department of Tobacco Control and Prevention of Respiratory Disease Center of Respiratory MedicineChina-Japan Friendship Hospital/WHO Collaborating Center for Tobacco Cessation and Respiratory Diseases Prevention/National Center for Respiratory Medicine/National Clinical Research Center for Respiratory Diseases/Institute of Respiratory MedicineChinese Academy of Medical SciencesBeijingChina Department of Pulmonary and Critical Care Medicine Center of Respiratory MedicineChina-Japan Friendship Hospital/WHO Collaborating Center for Tobacco Cessation and Respiratory Diseases Prevention/China National Center for Respiratory Medicine/China National Clinical Research Center for Respiratory DiseasesBeijingChina Chinese Academy of Medical Sciences and Peking Union Medical College BeijingChina 不详

What is already known about this topic?Medication non-adherence significantly impedes smoking cessation *** effective smoking cessation medications are accessible in china,realworld adherence and its correlation with treatment outcomes remain largely *** is added by this report?From December 2017 to January 2022,1,120 participants were recruited from 27 centers in all seven geographical regions of *** revealed that only 38.2%of smokers adhered to the prescribed 12-week smoking cessation treatment and those with a higher education level were more likely to be *** addition,smokers with good adherence were more likely to successfully quit *** are the implications for public health practice?The data obtained could enhance our understanding of smoking cessation practices in *** adherence is a crucial strategy to enhance the effectiveness of smoking cessation treatments and management provided to smokers.

关键词： china smoke likely

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Wafer level bonding using localized radio-frequency induction heating

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Science china(Technological Sciences) 2010年第5期53卷 1252-1257页

作者： CHEN MingXiang1,2,LIU WenMing1,2,XI YanYan1,2,LIN ChangYong1,2 & LIU Sheng1,2 1 School of Mechanical Science & Engineering,Huazhong University of Science and Technology,wuhan 43.074,china 2 Division of MOEMS,wuhan national laboratory for optoelectronics,wuhan 43.074,china School of Mechanical Science & Engineering Huazhong University of Science and Technology Wuhan China Division of MOEMS Wuhan National Laboratory for Optoelectronics Wuhan China

A wafer level bonding technique by localized induction heating has been developed and demonstrated in this paper.A suitable fabrication process scheme has also been established for the localized induction heating and *** takes only about 20 seconds to complete the bonding *** temperatures of solder loops and the central area of solder loops are above 300°C and below 70°C,*** to the solder reflow,robust and hermetic glass wafer bonding is accomplished,and the average tensile strength is 6.42 ***-heated or over-heated bonding has been found to result in cracks at bonding interfaces and sputtering layer,which degrades the bonding qualities.

关键词： wafer bonding induction heating MEMS MEMS packaging

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Congratulations on the success of the 6th International Photonics and optoelectronics Meetings （POEM 2013）

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Frontiers of optoelectronics 2013年第3期6卷 354-356页

作者： Office of Global Academic Exchanges of wuhan national laboratory for optoelectronics ,wuhan ,china Office of Global Academic Exchanges of wuhan national laboratory for optoelectronics Wuhan China

On May 25 2013, the 6th International Photonics and optoelectronics Meetings （POEM 2013） were grandly opened at wuhan national laboratory for optoelectronics （WNLO）, Huazhong University of Science and Technology （HUST） wuhan, china. POEM 2013, co-organized by WNLO and Optical Society of America （OSA）, includes two OSA Topical Meetings-Advanced optoelectronics for Energy and Environment （AOEE） and Nanophotonics, Nanoelectronics and Nanosensor （N3）. About 300 attendees from America, Australia, Canada, Japan, Germany, Korea, china, etc. are attracted to the conference, and these attendees include distinguished researchers, experts, technicians, entrepreneurs, investors,

关键词：纳米光子学电子学会国际华中科技大学国家实验室能源与环境纳米电子学纳米传感器

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Experimental study on high viscosity fluid micro-droplet jetting system

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Science china(Technological Sciences) 2010年第1期53卷 182-187页

作者： SHU XiaYun1,2,ZHANG HongHai1,2,LIU HuaYong1,2,XIE Dan1,2 & XIAO JunFeng1,2 1 School of Mechanical Science and Engineering,Huazhong University of Science and Technology,wuhan 43.074,china 2 Division of MOEMS,wuhan national laboratory of optoelectronics,wuhan 43.074,china School of Mechanical Science and Engineering Huazhong University of Science and Technology Division of MOEMS Wuhan National Laboratory of Optoelectronics

Fluid dispensing is a method by which fluid materials(such as epoxy,adhesive,and encapsulant) are delivered in a controlled manner in electronics *** jetting,derived from inkjet technology,is a noncontact,data-driven fluid dispensing *** ideal fluid materials for packaging are usually high viscous,which is difficult to realize by traditional inkjet *** this paper,a mechanical micro-droplet jetting system for high viscosity fluid was *** consists of dispensing valve,motion stage,temperature control subsystem,pneumatic subsystem,driving circuit for solenoid valve,and system control *** of this system under various circumstances was studied by changing several parameters,including working temperature,stroke length,back pressure and drive pulse *** droplets of 0.35 mm in diameter were produced by stainless steel nozzle of 0.2 mm in diameter in the experimental study.

关键词： high viscosity fluid micro-jetting microelectronics packaging

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On degrees of freedom of the cellular network

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Science china(Information Sciences) 2010年第05期53卷 1034-1043页

作者： SUN Jun 1,2 , LIU YingZhuang 1,2 & ZHU GuangXi 1,2 1 Department of Electronics and Information Engineering, Huazhong University of Science and Technology, wuhan 43.074, china 2 Division of Optical Network and Intelligent Communication, wuhan national laboratory for optoelectronics, wuhan 43.074, china Department of Electronics and Information Engineering Huazhong University of Science and Technology Division of Optical Network and Intelligent Communication Wuhan National Laboratory for Optoelectronics

In this paper, we consider the capacity limits of the cellular network by modeling it as consisting of two mutually interfering multiple access channels with multiple antennas at each receiver (e.g., base station). By developing a tight outerbound as well as an achievable scheme which exploits the idea of interference alignment, we are able to exactly characterize the sum degrees of freedom (DoF) of the network when the channel coefficients are timeor frequency-varying, which equals KM K+min(M,K) (where M and K denote the number of receiver antennas and number of users in per cell, respectively) per cell. From the DoF result, it can be observed that in addition to the multi-user gain which has been reported for the network with single-antenna BSs, there also exists the multi-antenna gain in the cellular network. In particular, when the number of users is large, we can nearly achieve the interference-free DoF of a cellular network with multiple-antenna BSs, which is a somewhat surprising result.

关键词： capacity degrees of freedom cellular network interference alignment interference channel MIMO

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Magnetic Properties of γ-Fe_2O_3 Nanoparticles Prepared by Laser Ablation

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Journal of wuhan University of Technology(Materials Science) 2006年第4期21卷 28-31页

作者：王泽敏 School of optoelectronics Science and Engineering Wuhan National Laboratory for OptoelectronicsHuazhong University of Science & TechnologyWuhan 430074China

A new method of preparing nanoparticles by pulsed-laser ablation of a tiny wire was reported, and pure maghemite （ γ-Fe2 O3 ） nanoparticles were synthesized by this method in a mixed gas flux of N2 and O2 at atmospheric pressure. The obtained γ-Fe2 O3 nanopartiles were in the range of 5 to 80 run in diameter and largely spherical in shape. Structural characteristics and morphologies of the nanoparticles were characterized by XRD and TEM , respectively. Moreover, magnetic properties of the obtained 7- Fe, O3 nanopartiles in the temperature range of 300 to 773 K were investigated. The experimental results demonstrate that the squareness value of the hysteresis loop decreases with increasing temperature. Both the coercivity and the saturation magnetization of the γ-Fe2 O3 nanoparticles show a constantly decrensing trend with increasing temperature up to the occurrerwe of the transformation from γ-Fe2O3 to α-Fe2O3. Especially, at the temperature of 773 K, the γ-Fe, O3 begins to transform to the α-Fe2 O3 phase and the hysteresis loop becomes unclosed .

关键词： magherrute nanoparticles laser ablation magnetic properties

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Human physiome based on the high-resolution dataset of human body structure

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Progress in Natural Science:Materials International 2008年第8期18卷 921-925页

作者： Qian Liu, Bo Wu, Shaoqun Zeng, Qingming Luo * Britton Chance Center for Biomedical Photonics, wuhan national laboratory for optoelectronics, Huazhong University of Science and Technology, wuhan 43.074, china Britton Chance Center for Biomedical Photonics Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology Wuhan 430074 China

Physiome Project, as a new concept, is proceeding rapidly with the great advancement of genomics, physiological experiment, biologic modeling and computer simulation technique. The project seeks to provide a quantitative framework for modeling of the human physiological system using computational approaches, which is able to integrate the knowledge of molecular biology, biochemical, biophysical and anatomical information on different levels, including cell, tissue, organ, system and organism. This paper reviews the development of the Physiome Project in the past decade. The role of high-resolution datasets of human body structure in Physiome Project is discussed. The future plan and applications of the high-resolution datasets of human body structure to Physiome Project are discussed as well.

关键词： Physiome Physiome Project Multi-scale modeling Anatomical modeling

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Firing patterns of long-term cultured neuronal network on multi-electrode array

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Progress in Natural Science:Materials International 2006年第12期16卷 1337-1342页

作者： LI Xiangning, ZHOU Wei, LIU Man, ZENG Shaoqun and LUO Qingming**(The Key laboratory of Biomedical Photonics of Ministry of Education-wuhan national laboratory for optoelectronics, Huazhong University of Science and Technology, wuhan 43.074, china) Key laboratory of Biomedical Photonics of Ministry of Education-wuhan national laboratory for optoelectronics Huazhong University of Science and Technology Wuhan 430074 China

Spontaneous neuronal activity plays an important role in the development and plasticity of brain. To explore the developmental changes in the firing pattern of the neuronal networks in vitro, the hippocampal neurons were cultured on the multi-microelectrode array dish for over 14 weeks and the spontaneous activity was recorded. The results showed that random firing was observed in the 1st week and transformed into synchronized activity after two weeks, then tightly synchronized activity appeared in week 2 to 7 and finally the activities transformed into the random firing pattern. These results suggested three stages in the long-term development of neuronal network in vitro: the stage for connection, the stage of synchronized activity and the mature stage. Synchronized firing shown by spontaneous activity was an important phenomenon in high density cultured neuronal network and transformed patterns during development.

关键词： neuronal networks development multi-electrode array cultured neuron.

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