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Nanorobot has the potential to automate the manipulation and observation processes at molecular scale. Current drug discovery process is labor and cost intensive. Thus, a strong demand exists to automate this process. Here, we developed an Atomic Force Microscopy (AFM) based nanorobot for in situ sensing molecular interactions for drug discovery. The AFM tip and sample substrate are functionalized...
A 45-m-long high-temperature superconducting (HTS) Maglev ring test line, named “Super-Maglev,” has been successfully developed in Chengdu, China, in February 2013, 12 years after the birth of the first man-loading HTS Maglev test vehicle. The Maglev vehicle (2.2 m in length, 1.1 m in width) is designed for one passenger with a levitation height of 10–20 mm; the permanent-magnet guideway (PMG) (45...
Dynamic performances of 2-dimensional force sensor is a deciding factor of electromechanical coupling system, therefore, it is necessary to study its dynamic performance in the experiment. Dynamic model of mechanical structure is established and its pulse incentive response curves are obtained through the simulation. Dynamic performances of mechanical structure of 2-dimensional force sensor are studied...
In this paper we discuss how to precisely reconstruct porous media 3D model and simulate the fluid flow in the porous media. Considering the characteristics of the porous media's fault slice images, we present a contour extraction algorithm and based on the extracted contour we acquire the sandwich fault images. We modify the original MC algorithm with bounding box technology to accelerate the running...
Taking the small unmanned four-rotor as a research object, the dynamic model of the small four-rotor was built according to Newton-Euler formaLism. Adaptive Inverse Control (AIC) Theory was used in the control of the small unmanned four-rotor for the first time and the attitude stabiLization control of the small unmanned four-rotor was reaLized on the experimental platform. The simulation results...
Atomic Force Microscopy (AFM) is a powerful tool for nano-size imaging. The advantage of AFM is that it can get extraordinary high resolution image at atom level. However, AFM obtains the sample topography image through scanning on the top of sample line by line, therefore it takes couples minutes to get an image and this negative point makes it difficult to continuously observe surface change during...
We report a strong electron-photon interaction in exfoliated graphene observed at room temperature. Graphene has great potential to optoelectronic applications because of its excellent optical properties. Here, we demonstrate using the graphene-based structure for infrared detection under a zero-bias operation. When infrared light is projected to graphene, the graphene is capable to generate photocurrents...
The strength reduction factor is the key factor in determining design seismic force. The ductility reduction factor, overstrength factor and strength reduction factor of RC frames designed according to current Chinese seismic code are calculated. A method for calculating the ductility reduction factor are proposed based on capacity spectrum method. Nine RC frames with different heights and design...
Atomic Force Microscopy (AFM) is a powerful and popular technique of single-molecule imaging both in air and liquid. Recent research and hardware development provide AFM with the function of manipulation nano-particle and modify sample surface in nano-scale. However, due to AFM usually takes several minutes to get an image and the surface change is hard to observe in real-time manipulation. In this...
In this paper, a micro/nano displacement sensor for PZT actuator which could measure the minute displacement in micron or nanometer level has been proposed. This paper focus on the whole process of this novel sensor from the working principle, parameter determination to the FEM simulation and so forth. This sensor can enlarge the displacement of the PZT by utilizing the lever principle and the strain...
Cell tensegrity model has been widely accepted as a qualitative and recently quantitative method to describe the cellular mechanics. It is based on the fact the cell body is an inhomogeneous cytoskeleton based structure bounded by a soft membrane. Cell establishes force balance under certain structural arrangement through its focal adhesions and intercellular adhesions, under which the prestress is...
Researchers have been looking for novel materials to improve the performance of photonic devices. Graphene has great potential to optoelectronic applications because of its excellent optical properties. Here, we demonstrate using the graphene-based photodetectors for infrared detection under a zero-bias operation. We have demonstrated to use an electric-field-assisted method to manipulate graphene...
Atomic Force Microscopy (AFM) based nanorobotics has been applied for building nano devices for almost a decade. It also offers the prospect for analyzing, handling and manipulating biological objects at nanometer scale. AFM itself is a high resolution imaging tool with unique advantages over others to work in liquid where physiological conditions can be maintained for biological samples. Visualization...
Appropriate dealing with boundary conditions is very important for SPH. Current boundary treatment methods like boundary force method, ghost particle method and virtual boundary layer method, when dealing with complex boundaries, they will have to compute much on putting external particles. For resolving this problem, we propose a new method assuming part of boundary surface instead of external particles,...
There has been a growing interest of parallel mechanisms which offer a high degree of precision, stiffness and dexterity to name just a few of their benefits as opposed to their traditional serial counterparts. For the applications of parallel mechanisms in the field of sensor, previous work was focused on investigating the 6 degree-of-freedom force/torque sensors based on common Gough-Stewart platform...
Micro displacement measurement of the PZT actuator is a micro sensor which could measure the minute displacement in micron or nanometer level. In general, the sensor is required to accommodate little space in order to save the room of measuring device. In this paper, a mechanical micro displacement sensor with smaller volume has been proposed. This paper focus on the whole process of this novel sensor...
In order to evaluate the dynamic behavior of the abutment with footing uplift and soil yielding, this paper analyzed the seismic response of the abutment supported by spread foundation. In discrete element method, the soil and abutment system is simulated by mass-spring model, and the pounding between the girder and the abutment, the elastic-plastic response of the back-fill soil and the underlying...
A novel generation of micro/nano displacement sensor for PZT actuator which could measure the minute displacement in micron or nanometer level has been performed in this paper. In general, the former two generations of sensor at IIM have been fabricated and tested successfully. In this paper, a new generation micro/nano displacement sensor with higher resolution has been proposed. This paper focus...
The micro/nano displacement measurement system described in this paper is a sensor that could measure micro/nanometer displacement level and has applications in a PZT actuator. As it is used in precision instruments, the sensor is required not to accommodate much space in order to save the room of measuring device, and what's more, it can detect the system's useful signal from the polluted weak signal...
Micro displacement measurement of the PZT actuator is a micro sensor which could measure the minute displacement in micron or nanometer level. In general, the sensor is required not to accommodate much space in order to save the room of measuring device. In this paper, a mechanical micro displacement sensor with smaller volume has been proposed. This paper focus on the whole process of this novel...
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