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Autonomous flying blimp interaction with human in an indoor space

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Frontiers of Information Technology & Electronic Engineering 2019年第1期20卷 45-59页

作者： Ning-shi YAO Qiu-yang TAO Wei-yu LIU Zhen LIU Ye TIAN pei-yu wang Timothy LI Fumin ZHANG School of Electrical and Computer Engineering Georgia Institute of Technology College of Computing Georgia Institute of Technology

We present the Georgia Tech Miniature Autonomous Blimp(GT-MAB), which is designed to support human-robot interaction experiments in an indoor space for up to two hours. GT-MAB is safe while flying in close proximity to humans. It is able to detect the face of a human subject, follow the human, and recognize hand gestures. GT-MAB employs a deep neural network based on the single shot multibox detector to jointly detect a human user's face and hands in a real-time video stream collected by the onboard camera. A human-robot interaction procedure is designed and tested with various human users. The learning algorithms recognize two hand waving gestures. The human user does not need to wear any additional tracking device when interacting with the flying blimp. Vision-based feedback controllers are designed to control the blimp to follow the human and fly in one of two distinguishable patterns in response to each of the two hand gestures. The blimp communicates its intentions to the human user by displaying visual symbols. The collected experimental data show that the visual feedback from the blimp in reaction to the human user significantly improves the interactive experience between blimp and *** demonstrated success of this procedure indicates that GT-MAB could serve as a flying robot that is able to collect human data safely in an indoor environment.

关键词： Robotic blimp Human-robot interaction Deep learning Face detection Gesture recognition

Activated carbon produced from paulownia sawdust for high-performance CO_2 sorbents

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Chinese Chemical Letters 2014年第6期25卷 929-932页

作者： Xiao-Li Zhu pei-yu wang Chao Peng Juan Yang Xing-Bin Yan Laboratory of Clean Energy Chemistry and Materials Lanzhou Institute of Chemical PhysicsChinese Academy of Science University of Chinese Academy of Sciences

In this paper, activated carbons （ACs） with high specific surface areas were successfully synthesized by simple one-step carbonization-activation from paulownia sawdust biomass, and the effects of the synthetic conditions on their CO2 capture capacity were investigated as well. The results show that, when the mass ratio between activator and biomass is 4, the activation temperature is 700℃ and the activation time is 1 h, as-made AC provides the most micropores for CO2 adsorption. As a consequence, the maximum CO2 uptake of 8.0 mmol/g is obtained at 0 ℃ and 1 bar.

关键词： Biomass Activated carbon CO2 absorption KOH activation

Optomechanically induced transparency with Bose-Einstein condensate in double-cavity optomechanical system

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Chinese Physics B 2018年第3期27卷 274-279页

作者： Li-Wei Liu Duo-Jie Gengzang Xiu-Jia An pei-yu wang College of Electrical Engineering Northwest University for NationalitiesLanzhou 730000China Key Laboratory for Electronic Materials of the State Ethnic Affairs Commission of PRC Northwest University for NationalitiesLanzhou 730000China

We propose a novel technique of generating multiple optomechanically induced transparency(OMIT)of a weak probe field in hybrid optomechanical *** system consists of a cigar-shaped Bose-Einstein condensate(BEC),trapped inside each high finesse Fabry-P6rot *** the resolved sideband regime,the analytic solutions of the absorption and the dispersion spectrum are *** tunneling strength of the two resonators and the coupling parameters of the each BEC in combination with the cavity field have the appearance of three distinct OMIT windows in the absorption ***,whether there is BEC in each cavity is a key factor in the number of OMIT windows *** technique presented may have potential applications in quantum engineering and quantum information networks.

关键词： optomechanically induced transparency Bose-Einstein condensate cavity optomechanical

Conditions and Stimulation for Germination in Glycyrrhiza uralensis Fisch Seeds

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Agricultural Sciences in China 2008年第12期7卷 1438-1444页

作者： MAO pei-sheng wang yu-hong wang Xin-guo LIAN Jia-jie HUANG Ying Forage Seed Lab China Agricultural University Beijing 100193 P.R.China

Evaluation of seed quality is the key to seed distributing and seeding of Glycyrrhiza uralensis Fisch, as an important species for pharmacy and soil conservation. Here, we study the effects of light and temperature on seed germination and mechanical and chemical scarification on breaking the seed coat. Seeds were collected in 2004, 2005, and 2006, placed in Petri dishes, and incubated at constant temperature 20, 25, and 30℃, and alternating temperature 15-25, 20-30, 15-30, and 20-35℃ under either an 8h photoperiod or total darkness for 28 consecutive days. Different methods were used to break the dormancy owing to hard seededness in this species such as chemical scarification by immersing in concentrated sulphuric acid for 5, 10, 15, 20, 25, 30, 45, and 60 min, in 0.2% KNO3 solution to saturate the seedbed, and prechilling for 7 d at 7℃ and mechanical scarification by cutting. The results showed that alternating temperature at 20-30℃ with 8 h photoperiod and 16 h darkness was optimum for G. uralensis seed germinating in the laboratory. Hard seeds were broken by concentrated sulphuric acid soaking or mechanical scarification by cutting. Germination of seeds harvested in two different years was both promoted by immersing for 30-45 min in concentrated sulphuric acid. KNO3 solution was ineffective for reducing hard seeds. During seed germinating, the first count was on the 7th day and the last count was on the 14th day.

关键词： seed germination seed hardness seed scarification Glycyrrhiza uralensis

Tunable second-order sideband effects in hybrid optomechanical cavity assisted with a Bose-Einstein condensate

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Chinese Physics B 2022年第10期31卷 389-398页

作者： Li-Wei Liu Chun-Guang Du Guo-Heng Zhang Qiong Chen yu-Qing Shi pei-yu wang yu-Qing Zhang College of Electrical Engineering Northwest Minzu UniversityLanzhou 730000China Visiting Scholar Department of PhysicsTsinghua UniversityBeijing 100084China State Key Laboratory of Low-Dimensional Quantum Physics and Department of Physics Tsinghua UniversityBeijing 100084China School of Physics and Electronics Science Hunan University of Science and TechnologyXiangtan 411201China

We theoretically investigated a second-order optomechanical-induced transparency(OMIT) process of a hybrid optomechanical system(COMS), which a Bose-Einstein condensate(BEC) in the presence of atom-atom interaction trapped inside a cavity with a moving end mirror. The advantage of this hybrid COMS over a bare COMS is that the frequency of the second mode is controlled by the s-wave scattering interaction. Based on the traditional linearization approximation, we derive analytical solutions for the output transmission intensity of the probe field and the dimensionless amplitude of the second-order sideband(SS). The numerical results show that the transmission intensity of the probe field and the dimensionless amplitude of the SS can be controlled by the s-wave scattering frequency. Furthermore, the control field intensities,the effective detuning, the effective coupling strength of the cavity field with the Bogoliubov mode are used to control the transmission intensity of the probe field and the dimensionless amplitude of the SS.

关键词： second-order sideband Bose-Einstein condensate cavity optomechanical

Core Shell Nanoparticles Prepared by sol-gel emulsion Process

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Core Shell Nanoparticles Prepared by sol-gel emulsion Proces...

Clinical Analysis of 13 Cases with Burkitt Lymphoma or Burkittlike Lymphoma

第十一届海峡两岸超微颗粒学术研讨会暨中国颗粒学会超微颗粒专委会2019年会

作者： Yi Hu Pin-Syuan Chen pei yu wang Department of Materials Engineering Tatung University

Sintering ability of alumina can be enhanced by incorporation of sintering additives such as SiO2 to lower the sintering ***,local inhomogrenity is frequenty found in the sintered productes due to the agglormation of the *** problem may be overcome by using the powders with core-shell *** this study,the coreshell structure of Al2 O3 nanoparticles coated with SiO2 layer was prepared by sol-gel emulsion ***2 O3 nanoparticles of of about 50 nm in average size and Tetraethyl orthosilicate(TEOS) were used for the formation of SiO2 layers on the surface of Al2 O3 *** reaction of TEOS via NaOH and water was conducted in thesoybean oil under virgursoly stirring at 100℃.The TEOS to NaOH ratio has been varied to control the thickness of the SiO2 *** of SiO2@Al2O3 core-shell nanostructure has been confirmed by Transmission electron microscope(TEM) and energy dispersive X-rayspectroscopy(EDS) *** results obtained from TEM images showed that theshell materials were smothly and tightly adhereled on Al2O3 *** core-shell material was composed of crystalline Al2O3 core covered by an about 5～10 nm amorphous SiO2 shell through X-ray diffraction(XRD) and TEM electron difrication *** core-shell powders also showed a good result in homogenuous microstructure under *** core–shell nanoparticlesin comparison with the simple mixed powders resulted in a modification of the mechanical properties of laser sintered ceramic products.

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来源： cnki会议评论

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Clinical oncology and cancer researeh 2010年第2期7卷 110-115页

作者： Ning-jing LIN Wen ZHENG yun-tao ZHANG Xiao-pei wang yu-qin SONG Yan XIE Mei-feng TU Ling-yan PING Jun ZHU Department of Lymphoma Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education) Peking University School of Oncology Beijing Cancer Hospital and Institute Beijing 100142 China.

OBJECTIVE To summarize the clinical characteristics and treatment effects of Burkitt lymphoma （BL） and Burkitt-like lymphoma （BLL）, and to explore the best possible optimal regimens and the treatment-related *** Clinical data of 13 BL and BLL patients, who were pathologically diagnosed and treated in the Beijing Cancer Hospital from August 1996 to October 2008, were retrospectively analyzed, All patients received the therapeutic regimen with chemotherapy as the first-line treatment. The treatment effect and adverse reactions were *** Of the 13 patients, 12 were men and 1 was woman, with a median age of 15 years （range, 11-62）. Three of the patients were in stage Ⅰ, 2 in stage Ⅱ, 2 in stage Ⅲ, and 6 in stage Ⅳ. Advanced cases were 8 （stage Ⅲ and Ⅳ）, accounting for 61.5% of the patients. Bone marrow involvement was found in 2 cases （15.4%） and central nervous system invasion in 4 （30.8%） at the beginning of the treatment. The common involved sites included the superficial lymph nodes （61.5%）, abdominal organs （53.8%）, and abdominal and retro-peritoneal lymph nodes （38.5%）. B symptoms were observed in 7 patients （53.8%）. Serum lactate dehydrogenase （LDH） level was increased in 8 of the 10 patients who underwent the serum LDH determination, while serum uric acid level was increased in 1 of the 10. Pathological diagnosis showed that 11 of the cases were BL and 2 BLL. Of the 13 patients, 11 （84.6%） achieved a complete remission （CR） or CR/unconfirmed （CRu）, and 1 （7.7%） a partial remission （PR）, with a total responsive rate of 92.3%. At a median follow-up of 8 months （range 5-35）, 6 patients were found dead at the end of the follow-up. One of the 13 patients was lost to the follow-up. The 1-year overall survival, progression-free survival and disease-free survival rates were 56.98%, 32.31% and 39.77%, respectively. The grade-Ⅲ or Ⅳ myelosuppression was found in 9 patients during the chemotherapy （69.2%）, and tumor lysis syndrome and grade-

关键词： Burkitt lymphoma invasion biomedicalresearch drug therapy combination.

农药对武夷山景区马尾松林节肢动物多样性的影响

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福建林学院学报 2007年第4期27卷 299-303页

作者：余培旺武夷山市森林病虫害防治检疫站福建武夷山354300

系统调查了武夷山风景区马尾松林防治区与未防治对照区标准地节肢动物群落的多样性。结果表明,防治区节肢动物群落的目、科、种和个体数量均有不同程度的下降。防治区比对照区少了2目(脉翅目和竹节虫目)4科30种2 044个个体数。对照区具... 详细信息

系统调查了武夷山风景区马尾松林防治区与未防治对照区标准地节肢动物群落的多样性。结果表明,防治区节肢动物群落的目、科、种和个体数量均有不同程度的下降。防治区比对照区少了2目(脉翅目和竹节虫目)4科30种2 044个个体数。对照区具有较大的物种丰富度S、个体数N、多样性指数H′和均匀度指数J和较小的优势度指数C。分析认为对照区林分的节肢动物群落稳定性大于防治区林分的。

关键词：农药节肢动物群落马尾松林武夷山景区

Nutrient Intakes of Pregnant Women and their Associated Factors in Eight Cities of China： A Cross-sectional Study

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Chinese Medical Journal 2015年第13期128卷 1778-1786页

作者： Fang-Li Liu yu-Mei Zhang Gerard Vinyes Pares Kathleen C Reidy Wen-Zhi Zhao Ai Zhao Cheng Chen Celia Y Ning Ying-Dong Zheng pei-yu wang Department of Nutrition and Food Hygiene School of Public Health Peking University Health Science Center Beijing 100191 China Nestle Research Center Beijing 100095 China Global Meals and Drinks Nestle Infant N'utdtion Flor'ham Park N J USA Department of Epidemiology and Biostatistics School of Public Health Peking University Health Science Center Beijing 100191 China

Background： During tile last 3 decades, China has dramatic changes of the dietary pattern among its citizens, particularly in urban cities. This study aimed to determine the nutrient intake status and factors associated with nutrient intakes of urban Chinese pregnant women now-a-day. Methods： The multistage stratified random sampling method was applied in the cross-sectional study. 479 women in three trimesters of pregnancy from eight cities of China were recruited. Nutrient intakes were evaluated with one 24 h dietary recall, and compared with the Chinese Dietary Reference Intakes （DRIs） 2013 tbr available nutrients. Results： Most pregnant women had imbalanced macronutrient distribution with excessive energy derived from fat. Intakes of Vitamin A, B, calcium, magnesium, and selenium were below Chinese Recommended Nutrient Intake （RNI） and Estimated Average Requirements （EARs） in all trimesters. Most pregnant women took more tblic acid in the first trimester with a significant decrease in the second and third trimester （P 〈 0.05）. Shortfall in iron intake was tbund in the third trimester whereas some women may be at the risk of excessive iron intake. Intakes of thiamin met RNI in the first trimester but were below EAR in all trimesters. Trimester phasing was positively associated with most nutrients （P 〈 0.05）. Prepregnancy body mass index was inversely associated with energy, tht, Vitamin C, and calcium intake （P 〈 0.05）. Educational level and household income were positively associated with folic acid intake （P 〈 0.05）. Conclusions： Cunent prenatal dietary choices of urban pregnant women in China are imbalanced in the nutrient intake when compared with national DRIs 2013, particularly in intakes of energy derived from fat and micronutrients. Appropriate dietary advice to pregnant women should promote a balanced diet with emphasis on avoidance of foods of high fat content and incorporation of t＇oods that are good sources of the key micronutrients that are usually l

关键词： Dietary Assessment: Fat Nutrient Intake Physiological Status Pregnant Women