Microscale device surface encapsulation needs to use ultrafine liquid transfer technology. This technology can a from donor receptor in controlled manner. However, the requirement of microscale for amounts is generally at pL level. Controlling volume, ensuring consistency, and droplet position accuracy became more difficult this In light existing pipetting needle ultramicro considering slow stretching bridge maintain constant ratio, we conducted in-depth research on parameter configuration...

The leakage of natural gas pipelines will waste energy and damage the environment. Research on diffusion features hydrogen-doped is beneficial to safe management pipelines. This paper established a numerical model used for simulating computing gas. Then, simulation experi-ments were conducted. First, accuracy was verified through experiments, appropriate mesh number determined. influence different hydrogen blending ratios various hole diameters calculated. Under same time, higher content in...

Air is usually compressed adiabatically in the compressor. As operating speed of compressors can be several thousand rpm, heat generated during compression cannot sufficiently transmitted to environment such a short time. It for this reason that compressor efficiency limited. Isothermal could an alternative choice applied on industrial and air energy storage (CAES). This paper proposed new kind piston perform isothermal compression. Surface area structure larger. A certain amount fluid at...

Reducing carbon emissions is an urgent problem around the world while facing energy and environmental crises. Whatever progress has been made in renewable research, efforts to energy-saving technology always necessary. The consumption from fluid power systems of industrial processes considerable, especially for pneumatic systems. A novel isothermal compression method was proposed lower compressors. porous medium introduced compose piston. located beneath a conventional piston, gradually...

Abstract Vapor‐compression refrigeration systems are widely used in equipment. Theoretically, the process is typically divided into two isobaric processes: an adiabatic isentropic compression and throttling process. The compressor main energy‐consuming component vapor‐compression systems. However, this device has a large energy loss low overall efficiency In study, modified cycle with isothermal piston proposed to realize near‐isothermal of refrigerator significantly reduce improve system...

Underwater Compressed Air Energy Storage takes advantage of the hydrostatic pressure in deep water to provide a means storing large amounts pressurized air without expending very sums money on containments. A key attractive feature all underwater storage pressurised is that containment may be largely isobaric (i.e. stored remains relatively constant irrespective level fill). One common issues for containments dissolution into water. The controlled by concentration and Henry's law can applied...

An isothermal piston is a device that can achieve near-isothermal compression by enhancing the heat transfer area with porous media. However, flow resistance between media and liquid introduced, which cannot be neglected at high operational speed. Thus, influence of rotational speed on system analyzed in this study. A mathematical model established based face-centered cubic structure hypothesis. The energy conservation rate efficiency are defined. effect discussed, comprehensive performance...

A critical aspect for isothermal compression is the rapid transfer of heat, which also represents a key challenge. The heat and resistance characteristics an piston were examined through dimensionless analysis, findings compared with experimental results. Two parameters, Ka Xu, established in model. index reflecting performance, Xu describes temperature variation porous media. As increases, fluid increases irreversibly. parameter Xpor proposed to indicate effect resistance; specifically,...

This work aims to improve the material segregation, bottom-of-furnace aggregation, and uneven particle distribution in feeding area of a lightly calcined MgO airflow hearth roaster. A structure type based on jet is proposed, large cold experimental device with an 85 mm inner diameter 3500 height established jet. Then effects different parameters flow characteristics magnesite particles jet-feeding furnace are investigated. The results indicate that could not only fluidization gas velocity...

"Large computation" is a problem of the traditional backstepping method, leading to poor control effect system. To solve this problem, controller based on active disturbance rejection (ADRC) designed for nonlinear system flexible joint manipulator with state constraints. The uncertainties model are approximated extended observer (ESO) further improve Lyapunov function restrict all states Results show that can effectively achieve constraint performance and position tracking accuracy significantly.

<abstract> <p>The control of robot manipulator pose is significantly complicated by the uncertainties arising from flexible joints, presenting substantial challenges in incorporating practical operational constraints. These are further exacerbated teleoperation scenarios, where factors such as synchronization and external disturbances amplify difficulties. At core this research introduction a pioneering controller, ingeniously integrating nonlinear extended state observer (ESO)...

<abstract> <p>The absence of an effective gripping force feedback mechanism in minimally invasive surgical robot systems impedes physicians' ability to accurately perceive the between instruments and human tissues during surgery, thereby increasing risks. To address challenge integrating sensors on tools existing systems, a clamping prediction method based mechanical clamp blade motion parameters is proposed. The interrelation force, displacement, compression speed, contact area...

With the development of IoT sensing information technology, emergence vibration energy harvesting technology provides a new way to solve power supply problem sensor nodes. In face actual situation where ambient is usually weak, design conversion efficiency and operating bandwidth harvester are critical. this paper, Galfenol-based bionic magnetostrictive bi-stable broadband inspired by rapid transformation shape flytrap proposed. Unlike structures realized using nonlinear magnetic forces or...

Purpose Accurate biomechanical modeling is crucial for enhancing the realism of virtual surgical training. This study addresses computational cost and complexity associated with traditional viscoelastic models by incorporating neural network algorithms, thereby augmenting predictive capability soft tissue modeling. Methods To address these challenges, present proposes a novel approach. The approach establishes relaxation prediction model based on backpropagation (BP) optimizes it using an...

The flexible joints introduce considerable uncertainty regarding robot manipulator pose control, and significantly complicates the implementation of practical operational constraints. These issues are particularly problematic under teleoperation conditions, which additional challenges associated with synchronization interference factors, such as external disturbances. This paper proposes a controller based on nonlinear extended state observer (ESO) barrier Lyapunov function (BLF) steady time...

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Lack of force feedback, which is one the most urgent problems in laparoscopic surgery, can be solved by installing sensors on surgical grabbers; however, there are many limitations such as biocompatibility and sterilization. In order to study soft tissue during this paper presents a method estimate grasping based grasper jaw parameters. The action tissues was reduced compression process single jaw. A estimation model explored using parameters speed, depth, contact area between tissue....