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水产科技情报 2003年第5期30卷 207-209页

作者：夏连军王建钢施兆鸿黄聪年中国水产科学研究院东海水产研究所上海200090

黄鲷是底栖性鱼类,具较高的经济价值和观赏价值。因其栖息水域较深,故获得活体的可能性较低。本文就温度、作业海域的深度、起网速度对黄鲷采捕成活率的影响进行了研究。

关键词：黄鲷采捕成活率温度作业海域深度起网速度

基于Android系统的智能循迹避障小车设计

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传感器与微系统 2018年第3期37卷 81-84页

作者：杨瑞东杨连军王云峰张海英中国科学院微电子研究所新一代通信射频芯片技术北京市重点实验室北京100029 中国科学院大学微电子学院北京100049

智能循迹避障小车由控制系统Android设备和小车主体两部分构成。小车通过5路红外对管组成的循迹模块进行路径识别,通过3路超声波模块检测小车周边的障碍物,单片机(MCU)根据采集的环境信息控制小车按照正确的轨迹移动。采用蓝牙模块与上... 详细信息

智能循迹避障小车由控制系统Android设备和小车主体两部分构成。小车通过5路红外对管组成的循迹模块进行路径识别,通过3路超声波模块检测小车周边的障碍物,单片机(MCU)根据采集的环境信息控制小车按照正确的轨迹移动。采用蓝牙模块与上位机Android系统进行通信,采集的小车状态信息通过蓝牙模块上传至Android设备显示,Android设备通过蓝牙模块发送指令到单片机串口控制小车。智能循迹避障小车的研究在无人驾驶方面具有广泛的应用前景。

关键词：循迹避障 Android系统红外对管超声波

Information entropy of coding metasurface

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Light(Science & Applications) 2016年第1期5卷 403-414页

作者： Tie-jun Cui Shuo Liu lian-Lin Li Department of Radio Engineering State Key Laboratory of Millimeter WavesSoutheast University2 Si-Pai-LouNanjing 210096China Innovation Centre of Terahertz Science No.4Section 2North Jianshe RoadChengdu 610054China Synergetic Innovation Center of Wireless Communication Technology Southeast UniversityNanjing 210096China School of Electronics Engineering and Computer Sciences Peking UniversityBeijing 100871China

Because of their exceptional capability to tailor the effective medium parameters,metamaterials have been widely used to control electromagnetic waves,which has led to the observation of many interesting phenomena,for example,negative refraction,invisibility cloaking,and anomalous reflections and ***,the studies of metamaterials or metasurfaces are mainly limited to their physical features;currently,there is a lack of viewpoints on metamaterials and metasurfaces from the information *** we propose to measure the information of a coding metasurface using Shannon *** establish an analytical connection between the coding pattern of an arbitrary coding metasurface and its far-field *** introduce geometrical entropy to describe the information of the coding pattern(or coding sequence)and physical entropy to describe the information of the far-field pattern of the *** coding metasurface is demonstrated to enhance the information in transmitting messages,and the amount of enhanced information can be manipulated by designing the coding pattern with different information *** proposed concepts and entropy control method will be helpful in new information systems(for example,communication,radar and imaging)that are based on the coding metasurfaces.

关键词： coding entropy information metasurface

Optimized nanoparticle-mediated delivery of CRISPR- Cas9 system for B cell intervention

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Nano Research 2018年第12期11卷 6270-6282页

作者： Min Li Ya-Nan Fan Zhi-Yao Chen Ying-Li Luo Yu-Cai wang Zhe-Xiong lian Cong-Fei Xu jun wang School of Life Sciences University of Science and Technology of ChinaHefei230027China Institutes for Life Sciences School of MedicineSouth China University of TechnologyGuangzhou 510006China School of Biomedical Sdence and Engineering South China University of TechnologyGuangzhou 510006China National Engineering Research Center for 7issue Restoration and Reconstruction South China University of TechnologyGuangzhou 570006China Key Laboratory of Biomedical Engineering of Guangdong Province South China University of TechnologyGuangzhou 510006China

B cells exert multiple effector functions, and dysfunctions of B cells often lead to initiation and progression of diseases, including autoimmune and inflammatory diseases. Therefore, B cell intervention may be an effective strategy to treat diseases involving B cells. The clustered regularly interspaced short palindromic repeats (CRISPR)-Cas9 gene editing system has been widely used for DNA deletion, insertion, and replacement. Nanocarriers have been developed as relatively mature systems and may be applied to deliver the CRISPR-Cas9 system to B cells in vivo. In this study, we created a library of nanoparticles (NPs) with different polyethylene glycol densities and zeta potentials and screened an optimal NP for in vivo B cell targeting. The selected NP could deliver the CRISPR-Cas9 system to B cells and induce Cas9 expression inside the cell environment. Injection of the NP encapsulated with Cas9/gB220 (NPCas9/gB220) into mice could disrupt B220 expression in B cells, suggestive of its applications to intervene the expression of the target molecule in B cells. Moreover, the treatment with NPCas9/gBAFFR could decrease the number of B cells and exert therapeutic effect in rheumatoid arthritis, as B-cell activating factor receptor (BAFFR) is vital for the survival and functions of B cells. In conclusion, we developed a carrier for the delivery of the CRISPR-Cas9 gene editing system for B cell intervention that could be used for the treatment of diseases related to B cell dysfunctions.

关键词： B cell gene editing nanoparticle immune intervention autoimmunity ABSTRACT

Research on magnetic metallization of microorganism cells using electroplating technique

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Science China(Technological Sciences) 2011年第6期54卷 1525-1531页

作者： CAI jun ZHANG DeYuan LAN MingMing lian ZhiYang Bionic and Miero/Nano/Bio Manufacturing Technology Research Center School of Mechanical Engineering and Automation Beihang University Beijing 100191 China

Spirulina platensis were chosen as templates to produce microscopic helical soft-core magnetic particles by way of depositing ferromagnetic alloy onto their surface using electroplating technique,and the process of electroplating ferromagnetic alloy onto microorganism cells was *** morphology and appearance of the coated Spirulina platensis were analyzed with optical microscopy and scanning electron microscopy,respectively,and the ingredients and phase structure of the alloy coating were analyzed with energy dispersive X-ray detector(EDX) and X-ray diffractive analysis(XRD),*** result showed that the particles were successfully coated with uniform metal coating and their initial helical shape was perfectly *** coating was NiFe alloy,and its phase structure was face-centered cubic *** magnetic properties of the coated particles were tested with vibrating sample magnetometer(VSM),and the result showed that the particles were ferro-magnetic,which means the magnetic electroplating of the microorganism cells was successfully *** electrochemical reaction mechanism of the magnetic plating process was also analyzed;the result showed that the deposition of NiFe on the microorganism cells was anomalous codeposition,and that Fe2+ ion was preferential deposited when magnetic stirring was applied.

关键词： bio-limited forming microorganism helical particles electroplating magnetic metallization

TDC-GPX-based synchronization scheme for QKD system

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Nuclear Science and Techniques 2016年第1期27卷 88-92页

作者： lian-jun Jiang Shi-Biao Tang Ze-Jie Yin State Key Laboratory of Particle Detection and Electronics University of Science and Technology of China Department of Modern Physics University of Science and Technology of China

To meet the needs of signal alignment between the transmitter and receiver in a quantum key distribution(QKD) system, we put forward a TDC-GPX-based synchronization scheme, which is based on high-precision time measurement. We send a low-frequency repeat optical pulse synchronized with associated quantum signals on the receiver's side by using a time-to-digital converter(TDC)module, the time intervals between quantum signals, and synchronization signals measured and converted to corresponding temporal orders to complete the *** state the principle of the synchronization scheme in detail and then verify it in an actual QKD test bed. The test results show that our TDC-GPX-based synchronization can obtain a time resolution better than 100 ps, and the proposed scheme shows full feasibility for an actual QKD system.

关键词： TDC QKD GPX 同步系统量子密钥分配时间数字转换器信号调整

A Practical Approach to Synthesize Multi-channel Fiber Bragg Grating with Right-Angled Triangular Spectrum

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Chinese Physics Letters 2012年第11期29卷 98-101页

作者： YU Xue-lian YAO Yong XIAO jun-jun TIAN Jia-jun School of Electronic and Information Engineering Shenzhen Graduate SchoolHarbin Institute of TechnologyShenzhen 518055 Department of Optics Information Science and Technology Harbin University of Science and TechnologyHarbin 150080

A novel approach is proposed towards the design of fiber Bragg gratings with multi-channel right-angled triangular ***,a single-channel grating is synthesized utilizing an adaptive quantum particle swarm optimization with the piecewise constant mutated ***,the reflectivity spectrum with good linear edge for a short grating is ***,for its merits of easy fabrication,the superposition method is adopted to design multi-channel gratings with initial spectral ***,this distortion is optimized by the method in the first *** is shown that the design outcomes still retain the features of easy fabrication and short *** gratings would be useful as wavelength-interrogation devices with multiple physical parameters in optical sensor systems.

关键词： channel Angle utilizing

Effects of Water Stress on Reactive Oxygen Species Generation and Protection System in Rice During Grain-Filling Stage

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Agricultural Sciences in China 2010年第5期9卷 633-641页

作者： wang He-zheng ZHANG lian-he MA jun LI Xu-yi LI Yan ZHANG Rong-ping wang Ren-quan College of Agriculture Henan University of Science and Technology Luoyang 471003 P.R.China Rice Research Institute of Sichuan Agricultural University Wenjiang 611130 P.R.China

Rice is one of the main staple food crops in the world, but it may suffer serious water stress during growth period. Water stress during grain filling results in decreased grain yeild, but its mechanism generating and scavenging the active oxygen is unclear under continuance of the water stress. The experiment was carried out in growth chamber to investigate the effects of water stress on the production of superoxide free radical （O2）, hydrogen peroxide （H202）, malondialdehyde （MDA）, reduced glutathione （GSH）, ascorbic acid （AsA）, and antioxidative enzyme activities in three rice hybrids with differing drought resistant under both normal and drought conditions during grain-filling stage. The results showed that water stress aggravated the membrane lipid peroxidation in rice leaves, which was more severe in less drought resistant hybrids than that in more tolerant ones. Also O2＇ and H2O2 accumulated more rapidly in less drought resistant hybrids than that in more tolerant ones. During water stress, decreases of GSH, AsA, chlorophyll, and relative water contents in more drought resistant hybrids were obvious less than those in less tolerant ones. Activities of superoxide dismutase （SOD）, catalase （CAT） and peroxidase （POD） in/eaves increased obviously in 0-14 d after heading and subsequently decreased rapidly, and those in more drought resistant hybrids were more than those in less tolerant ones. The results showed that changes of O2, H2O2, MDA, GSH, and AsA contents and antioxidative enzyme activities correlated significantly to drought resistance of rice hybrids, and more drought resistant hybrids possessed high ant oxidation capacity.

关键词： rice water stress reactive oxygen species protection system

Effects of water application uniformity using a center pivot on winter wheat yield, water and nitrogen use efficiency in the North China Plain

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Journal of Integrative Agriculture 2020年第9期19卷 2326-2339页

作者： CAI Dong-yu YAN Hai-jun LI lian-hao College of Water Resources and Civil Engineering China Agricultural UniversityBeijing 100083P.R.China College of Mechanical and Electronic Engineering Henan Agricultural UniversityZhengzhou 450002P.R.China

In recent years, the use of fertigation technology with center pivot irrigation systems has increased rapidly in the North China Plain (NCP). The combined effects of water and nitrogen application uniformity on the grain yield, water use efficiency (WUE) and nitrogen use efficiency (NUE) have become a research hotspot. In this study, a two-year field experiment was conducted during the winter wheat growing season in 2016–2018 to evaluate the water application uniformity of a center pivot with two low pressure sprinklers (the R3000 sprinklers were installed in the first span, the corresponding treatment was RS;the D3000 sprinklers were installed in the second span, the corresponding treatment was DS) and a P85A impact sprinkler as the end gun (the corresponding treatment was EG), and to analyze its effects on grain yield, WUE and NUE. The results showed that the water application uniformity coefficients of R3000, D3000 and P85A along the radial direction of the pivot (CUH) were 87.5, 79.5 and 65%, respectively. While the uniformity coefficients along the traveling direction of the pivot (CUC) were all higher than 85%. The effects of water application uniformity of the R3000 and D3000 sprinklers on grain yield were not significant (P>0.05);however, the average grain yield of EG was significantly lower (P<0.05) than those of RS and DS, by 9.4 and 11.1% during two growing seasons, respectively. The coefficients of variation (CV) of the grain yield had a negative correlation with the uniformity coefficient. The CV of WUE was more strongly affected by the water application uniformity, compared with the WUE value, among the three treatments. The NUE of RS was higher than those of DS and EG by about 6.1 and 4.8%, respectively, but there were no significant differences in NUE among the three treatments during the two growing seasons. Although the CUH of the D3000 sprinklers was lower than that of the R3000, it had only limited effects on the grain yield, WUE and NUE. However

关键词： center pivot low pressure sprinkler water application uniformity winter wheat water and nitrogen use efficiency

Large eddy simulation of unsteady flow in gas-liquid separator applied in thorium molten salt reactor

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Nuclear Science and Techniques 2018年第5期29卷 10-18页

作者： Jing-Jing Li Ya-Lan Qian jun-lian Yin Hua Li Wei Liu De-Zhong wang School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China Shanghai Institute of Applied Physics Shanghai 201800China

Axial gas-liquid separators have been adopted in fission gas removal systems for the development of thorium molten salt reactors. In our previous study, we observed an unsteady flow phenomenon in which the flow pattern is directly dependent on the backpressure in a gas-liquid separator; however, the underlying flow mechanism is still unknown. In order to move a step further in clarifying how the flow pattern evolves with a variation in backpressure, a large eddy simulation(LES) was adopted to study the flow field evolution. In the simulation, an artificial boundary was applied at the separator outlet under the assumption that the backpressure increases linearly. The numerical results indicate that the unsteady flow feature is captured by the LES approach, and the flow transition is mainly due to the axial velocity profile redistribution induced by the backpressure variation. With the increase in backpressure,the axial velocity near the downstream orifice transits from negative to positive. This change in the axial velocity sign forces the unstable spiral vortex to become a stable rectilinear vortex.

关键词： Swirl flow Thorium molten salt reactor Computational fluid dynamics Large eddy simulation