候选门级辐射类群(candidate phyla radiation,CPR)所包含的细菌种类约占已知细菌种类总数的1/4,然而该类细菌中只有解糖微小寄生菌(Saccharibacteria,又名TM7)的少数菌株被成功分离培养.研究发现,解糖微小寄生菌具有许多独特的生物学性状:该类细菌需要寄生在宿主细菌表面生长,这是一种全新的“细菌-细菌”寄生生存方式;细菌尺寸及基因组均较小,缺乏代谢相关基因,不能合成氨基酸和维生素;对宿主细菌表现出杀伤作用或保护其躲避免疫系统的攻击.此外,解糖微小寄生菌与牙周病等疾病
Atomic layer deposition (ALD) as a flexible surface-controlled fabrication technique has attracted widespread interest in numerous nanotechnology applications,which can obtain ultrathin or two-dimensional molybdenum disulfide (2D MoS2) films.The ALD techn
The safety of lithium-ion batteries under mechanical abuse has become one of the major obstacles affecting the development of electric vehicles.In this paper,the lithium-ion battery safety model under mechanical abuse conditions is proposed by the Back Pr
A segmented hyper-redundant manipulator can perform complicated operation tasks in a confined space due to its high flexibility and dexterity.However,the trajectory planning in a narrow space and obstacles environment is very challenging for the manipulat
Wearable pressure sensors have drawn significant attention because of their extensive applications in motion detection,tactile sensing,and health monitoring.However,the complex manufacturing process and high cost of active materials make low-cost,large-sc
This paper proposes a novel motion planning and tracking framework based on improved artificial potential fields (APFs) and a lane change strategy to enhance the performance of the active collision avoidance systems of autonomous vehicles on structured ro
The widely used kinesthetic demonstration method of dragging robotic manipulators cannot obtain reliable information for autonomous robot manipulation because an additional external force rather than pure contact force will be reflected on the force senso
Station-keeping (SK) is indispensable in actual geostationary (GEO) satellite missions.Due to the luni-solar gravity perturba-tions,the inclination of a GEO satellite suffers the issues of secular drift and long-period oscillation.Current north-south (NS)
A numerical simulation method of shield tunnel excavation is developed to capture the time-dependent deformation behaviour of surrounding soil.The simulation method consists of four parts:(i) an elastic-plastic-viscous constitutive model that can not only
With the development of electric vehicles (EV),there is a huge demand for electric vehicle charging stations (EVCS).The utilization of renewable energy sources (RES) in EVCS can not only decrease the energy fluctuation by participating in peak-load reduct