Microsatellites have been widely applied in the fields of communication,remote sensing,navigation and science exploration due to its characteristics of low cost,flexible launch mode and short development period.Howeve...Microsatellites have been widely applied in the fields of communication,remote sensing,navigation and science exploration due to its characteristics of low cost,flexible launch mode and short development period.However,conventional solid-propellant have difficulties in starting and interrupting combustion because combustion is autonomously sustained after ignition Herein,we proposed a new type of solid-propellant named laser-controlled solid propellant,which is sensitive to laser irradiation and can be started or interrupted by switching on/off the continuous wave laser.To demonstrate the feasibility and investigate the controllable combustion behaviors under different laser on/off conditions,the combus tion parameters including burning rate,ignition delay time and platform pressure were tested using pressure sensor,high-speed camera and thermographic camera.The results showed that the increase of laser-on or laser-off duration both will lead to the decrease of propellant combustion performance during re-ignition and re-combustion process.This is mainly attributed to the laser attenuation caused by the accumulation of combustion residue and the change of chamber ambient temperature.Simultaneously the multiple ignition tests revealed that the increased chamber ambient temperature after combustion can make up for the energy loss of laser attenuation and expansion of chamber cavity.However,the laser-controlled combustion performance of solid propellant displayed a decrease trend with the addi-tion of ignition times.Nevertheless,the results still exchibited good laser-controlled agility of laser-controlled solid propellant and manifested its inspiring potential in many aspects of space missions.展开更多
Brain-Computer Interface (BCI) techniques have advanced to a level where it is now eliminating the need lor hand-based activation. This paper presents a novel attempt to remotely control an animal's behavior by hum...Brain-Computer Interface (BCI) techniques have advanced to a level where it is now eliminating the need lor hand-based activation. This paper presents a novel attempt to remotely control an animal's behavior by human BCI using a hybrid of Event Related Desynchronization (ERD) and Steady-State Visually Evoked Potential (SSVEP) BCI protocols. The turtle was chosen as the target animal, and we developed a head-mounted display, wireless communication, and a specially designed stimulation device for the turtle. These devices could evoke the turtle's instinctive escape behavior to guide its moving path, and turtles were remotely controlled in both indoor and outdoor environments. The system architecture and design were presented. To demon- strate the feasibility of the system, experimental tests were performed under various conditions. Our system could act as a framework for future human-animal interaction systems.展开更多
OBJECTIVE: To observe the therapeutic effects of electro-acupuncture(EA) combined with psychological intervention on the symptom of somzatization or obsession and mental symptom of depression or anxiety and P50 of Aud...OBJECTIVE: To observe the therapeutic effects of electro-acupuncture(EA) combined with psychological intervention on the symptom of somzatization or obsession and mental symptom of depression or anxiety and P50 of Auditory Evoked Potential(AEP) on internet addiction disorder(IAD).METHODS: One hundred and twenty cases of IAD were randomly divided into an EA group, a psycho-intervention(PI) group and a comprehensive therapy(EA plus PI) group. Patients in the EA group were treated with EA. Patients in the PI group were treated with cognition and behavior therapy. Patients in the EA plus PI group were treated with electro-acupuncture plus psychological intervention. Scores of IAD, scores of the symptom checklist90(SCL-90), latency and amplitude of P50 of AEP were measured before and after treatment.RESULTS: The scores of IAD after treatment significantly decreased in all groups(P < 0.05), and thescores of IAD in the EA plus PI group were significantly lower than those in the other two groups(P < 0.05). The scores of SCL-90 assembled and each factor after treatment in the EA plus PI group significantly decreased(P < 0.05). After treatment in the EA plus PI group, the amplitude distance of S1P50 and S2P50(S1-S2) significantly increased(P < 0.05).CONCLUSION: EA combined with PI could relieve the mental symptoms of IAD patients, and the mechanism is possibly related to the increase of cerebrum sense perception gating function.展开更多
An association between assisted reproductive technology (ART) and neurobehavioral imprinting disorders has been reported in many studies, and it seems that ART may interfere with imprint reprogramming. However, it h...An association between assisted reproductive technology (ART) and neurobehavioral imprinting disorders has been reported in many studies, and it seems that ART may interfere with imprint reprogramming. However, it has never been explored whether epigenetic erros or imprinting disease susceptibility induced by ART can be inherited transgenerationally. Hence, the aim of this study was to determine the effect of in vitro fertilization and embryo transfer (IVF-ET) on transgenerational inheritance in am inbred mouse model. Mice derived from IVF-ET were outcrossed to wild-type C57BL/6J to obtain their female and male line F2 and F3 generations. Their behavior, morphology, histology, and DNA methylation status at several important differentially methylated regions (DMRs) were analyzed by Morris water maze, hematoxylin and eosin (H&E) staining, and bisulfite genomic sequencing. No significant differences in spatial learning or phenotypic abnormality were found in adults derived from IVF (F1) and female and male line F2 and F3 generations. A borderline trend of hypomethylation was found in H19 DMR CpG island 3 in the female line-derived F3 generation (0.40±0.118, P=0.086). Methylation status in H19/Igf2 DMR island 1, Igf2 DMR, KvDMR, and Snrpn DMR displayed normal patterns. Methylation percentage did not differ significantly from that of adults conceived naturally, and the expression of the genes they regulated was not disturbed. Transgenerational integrity, such as behavior, morphology, histology, and DNA methylation status, was maintained in these generations, which indicates that exposure of female germ cells to hormonel stimulation and gamete manipulation might not affect the individuals and their descendents.展开更多
古籍文本中存在大量事实上的引文条目,即引书。目前,引文分析法多基于现代文本开展研究,学术界对古籍文本中的引用现象的关注较少。本文将引文分析法应用于古籍文本,计算和分析引书的引文指标,为古籍文本的引书计量学研究建立初步框架...古籍文本中存在大量事实上的引文条目,即引书。目前,引文分析法多基于现代文本开展研究,学术界对古籍文本中的引用现象的关注较少。本文将引文分析法应用于古籍文本,计算和分析引书的引文指标,为古籍文本的引书计量学研究建立初步框架。本文选择《十三经注疏》中的《论语注疏》《毛诗正义》《春秋左传正义》三部典籍为研究对象,分别基于CRF(conditional random field)模型、Bi-LSTM(bidirectional long short-term memory)模型以及Bi-LSTM-CRF模型,从古籍文本中自动识别引书条目,并对比抽取性能,利用引文分析方法计算并分析了三部典籍中引书的各项引文计量指标,进而分析古籍文本之间的知识关联,探讨古人的引用行为。研究结果表明,机器学习模型应用于引书条目的自动识别整体效果良好,两种深度学习模型表现更佳,CRF模型存在明显差距。在两种深度学习模型中,Bi-LSTM-CRF模型性能略好。古籍文本之间的关联强度不一,引书的规模受多方因素影响,经部文献的被引次数占比最高,经部文献中的礼制类文献尤甚。此外,古人的引用行为也受成书目的、学者知识背景、引书文献获取难易程度等多重因素的影响。展开更多
基金This work was supported by the Shanghai Aerospace Science&Technology Innovation Fund[grant number SAST201363],and the Fundamental Research Funds for the Central Universities[grant number 30919012102 in part]We gratefully acknowledge the technical support provided by Hao-yu Wang,Wei-kang Chen and Zhi-jing Xu(Shanghai Space Propulsion Technology Research Institute,China).
摘要Microsatellites have been widely applied in the fields of communication,remote sensing,navigation and science exploration due to its characteristics of low cost,flexible launch mode and short development period.However,conventional solid-propellant have difficulties in starting and interrupting combustion because combustion is autonomously sustained after ignition Herein,we proposed a new type of solid-propellant named laser-controlled solid propellant,which is sensitive to laser irradiation and can be started or interrupted by switching on/off the continuous wave laser.To demonstrate the feasibility and investigate the controllable combustion behaviors under different laser on/off conditions,the combus tion parameters including burning rate,ignition delay time and platform pressure were tested using pressure sensor,high-speed camera and thermographic camera.The results showed that the increase of laser-on or laser-off duration both will lead to the decrease of propellant combustion performance during re-ignition and re-combustion process.This is mainly attributed to the laser attenuation caused by the accumulation of combustion residue and the change of chamber ambient temperature.Simultaneously the multiple ignition tests revealed that the increased chamber ambient temperature after combustion can make up for the energy loss of laser attenuation and expansion of chamber cavity.However,the laser-controlled combustion performance of solid propellant displayed a decrease trend with the addi-tion of ignition times.Nevertheless,the results still exchibited good laser-controlled agility of laser-controlled solid propellant and manifested its inspiring potential in many aspects of space missions.
摘要Brain-Computer Interface (BCI) techniques have advanced to a level where it is now eliminating the need lor hand-based activation. This paper presents a novel attempt to remotely control an animal's behavior by human BCI using a hybrid of Event Related Desynchronization (ERD) and Steady-State Visually Evoked Potential (SSVEP) BCI protocols. The turtle was chosen as the target animal, and we developed a head-mounted display, wireless communication, and a specially designed stimulation device for the turtle. These devices could evoke the turtle's instinctive escape behavior to guide its moving path, and turtles were remotely controlled in both indoor and outdoor environments. The system architecture and design were presented. To demon- strate the feasibility of the system, experimental tests were performed under various conditions. Our system could act as a framework for future human-animal interaction systems.
基金National Natural Science Foundation of China:Research of Central Mechanism on Electro Acupuncture in Desalinating Internet Addiction of Patients with Pathological Internet Use based on Mirror Neuron System(No.81574047)Research of Central Responsive Mechanism on Electro Acupuncture in the Adjustment of Internet Addiction Impulse Control Disorder(No.81072852)+5 种基金Fund of the Fok Ying Tung Education Foundation:Research of Central Integration Mechanism on Electro Acupuncture in the Adjustment of Prefrontal Cortex-Buckle Impulse Control Loops related to Internet Addiction(No.131106)The Training Funds of Academic and Technical Leader in Sichuan Province:Research on the Central Mechanism of Electro-Acupuncture Rehabilitation Treatment for Internet Addiction Based on Brain Working Memory NetworkApplied Basic Research Projects of Sichuan Provincial Science and Technology Department:Research of Central Integration Mechanism on the Effect of Electro Acupuncture on Brain Working Memory of Internet Addiction Disorder Patients(No.2013JY0162)Sichuan Provincial Health Department Project:Research on Brain Working Ability and the Characteristics of Electroencephalograph Entropy in IAD Patients(No.110083)People-Benefiting Technology Research and Development Project of Chengdu Science and Technology Bureau:Research on Electro Acupuncture in 5-HT and 5-HTT Gene as Well as its Expression Control of Pathological Internet Use Patients(No.2014-HM01-00180-SF)The Colleges and UniversitiesApplication Achievement-transformation Project Plan in Chengdu Municipal Science and Technology Bureau:Research of Central Responsive Mechanism and the Effect of Electro Acupuncture on Working Memory Of IAD Patients(No.12DXYB148JH-002)
摘要OBJECTIVE: To observe the therapeutic effects of electro-acupuncture(EA) combined with psychological intervention on the symptom of somzatization or obsession and mental symptom of depression or anxiety and P50 of Auditory Evoked Potential(AEP) on internet addiction disorder(IAD).METHODS: One hundred and twenty cases of IAD were randomly divided into an EA group, a psycho-intervention(PI) group and a comprehensive therapy(EA plus PI) group. Patients in the EA group were treated with EA. Patients in the PI group were treated with cognition and behavior therapy. Patients in the EA plus PI group were treated with electro-acupuncture plus psychological intervention. Scores of IAD, scores of the symptom checklist90(SCL-90), latency and amplitude of P50 of AEP were measured before and after treatment.RESULTS: The scores of IAD after treatment significantly decreased in all groups(P < 0.05), and thescores of IAD in the EA plus PI group were significantly lower than those in the other two groups(P < 0.05). The scores of SCL-90 assembled and each factor after treatment in the EA plus PI group significantly decreased(P < 0.05). After treatment in the EA plus PI group, the amplitude distance of S1P50 and S2P50(S1-S2) significantly increased(P < 0.05).CONCLUSION: EA combined with PI could relieve the mental symptoms of IAD patients, and the mechanism is possibly related to the increase of cerebrum sense perception gating function.
基金supported by the National Basic Research Program (973) of China (No. 2007CB948104)the National Natural Science Foundation of China (No. 81070532)the Zhejiang Provincial Natural Science Foundation of China (No. Z207021)
摘要An association between assisted reproductive technology (ART) and neurobehavioral imprinting disorders has been reported in many studies, and it seems that ART may interfere with imprint reprogramming. However, it has never been explored whether epigenetic erros or imprinting disease susceptibility induced by ART can be inherited transgenerationally. Hence, the aim of this study was to determine the effect of in vitro fertilization and embryo transfer (IVF-ET) on transgenerational inheritance in am inbred mouse model. Mice derived from IVF-ET were outcrossed to wild-type C57BL/6J to obtain their female and male line F2 and F3 generations. Their behavior, morphology, histology, and DNA methylation status at several important differentially methylated regions (DMRs) were analyzed by Morris water maze, hematoxylin and eosin (H&E) staining, and bisulfite genomic sequencing. No significant differences in spatial learning or phenotypic abnormality were found in adults derived from IVF (F1) and female and male line F2 and F3 generations. A borderline trend of hypomethylation was found in H19 DMR CpG island 3 in the female line-derived F3 generation (0.40±0.118, P=0.086). Methylation status in H19/Igf2 DMR island 1, Igf2 DMR, KvDMR, and Snrpn DMR displayed normal patterns. Methylation percentage did not differ significantly from that of adults conceived naturally, and the expression of the genes they regulated was not disturbed. Transgenerational integrity, such as behavior, morphology, histology, and DNA methylation status, was maintained in these generations, which indicates that exposure of female germ cells to hormonel stimulation and gamete manipulation might not affect the individuals and their descendents.
摘要古籍文本中存在大量事实上的引文条目,即引书。目前,引文分析法多基于现代文本开展研究,学术界对古籍文本中的引用现象的关注较少。本文将引文分析法应用于古籍文本,计算和分析引书的引文指标,为古籍文本的引书计量学研究建立初步框架。本文选择《十三经注疏》中的《论语注疏》《毛诗正义》《春秋左传正义》三部典籍为研究对象,分别基于CRF(conditional random field)模型、Bi-LSTM(bidirectional long short-term memory)模型以及Bi-LSTM-CRF模型,从古籍文本中自动识别引书条目,并对比抽取性能,利用引文分析方法计算并分析了三部典籍中引书的各项引文计量指标,进而分析古籍文本之间的知识关联,探讨古人的引用行为。研究结果表明,机器学习模型应用于引书条目的自动识别整体效果良好,两种深度学习模型表现更佳,CRF模型存在明显差距。在两种深度学习模型中,Bi-LSTM-CRF模型性能略好。古籍文本之间的关联强度不一,引书的规模受多方因素影响,经部文献的被引次数占比最高,经部文献中的礼制类文献尤甚。此外,古人的引用行为也受成书目的、学者知识背景、引书文献获取难易程度等多重因素的影响。