Xiaochan Liu
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View article: Novel Aerogel Structure of β-Eucryptite: Featuring Low Density, High Specific Surface Area, and Negative Thermal Expansion Coefficient
Novel Aerogel Structure of β-Eucryptite: Featuring Low Density, High Specific Surface Area, and Negative Thermal Expansion Coefficient Open
Traditional β-eucryptite (LiAlSiO4) is renowned for its unique characteristics of low thermal expansion and high temperature thermal stability, making it an ideal material for precision instruments and aerospace applications. In this study…
View article: Novel Aerogel Structure of Β-Eucryptite: Featuring Low Density, High Specific Surface Area and Negative Thermal Expansion Coefficient
Novel Aerogel Structure of Β-Eucryptite: Featuring Low Density, High Specific Surface Area and Negative Thermal Expansion Coefficient Open
View article: Development of Vertical Vibration Model for Micro-Tiller by Smoothed Particle Hydrodynamics Method
Development of Vertical Vibration Model for Micro-Tiller by Smoothed Particle Hydrodynamics Method Open
A micro-tiller vibrates severely during the rotary tillage process, which may cause operators to develop white finger disease. However, for most vibration models, the acting force between the soil and the rotary cutter roll was simplified …
View article: Navigation Line Extraction Method for Broad-Leaved Plants in the Multi-Period Environments of the High-Ridge Cultivation Mode
Navigation Line Extraction Method for Broad-Leaved Plants in the Multi-Period Environments of the High-Ridge Cultivation Mode Open
Navigation line extraction is critical for precision agriculture and automatic navigation. A novel method for extracting navigation lines based on machine vision is proposed herein using a straight line detected based on a high-ridge crop …
View article: Preparation and Thermal Insulation Performance of Al2o3-Y2o3-Sio2 Ternary Composite Aerogels with High Specific Surface Area and Low Density
Preparation and Thermal Insulation Performance of Al2o3-Y2o3-Sio2 Ternary Composite Aerogels with High Specific Surface Area and Low Density Open
View article: Optical design of spherical zone projection lens for small and medium-sized flight simulator
Optical design of spherical zone projection lens for small and medium-sized flight simulator Open
针对现有沉浸式飞行模拟器进一步小型化和低成本化的需求,设计了一款应用于中小型飞行模拟器的球带幕投影镜头。论文确定了投影方案中各部件(球带幕、投影机、投影物镜)的关键参数,设计的球带幕投影镜头具有172°的视场角和6∶1的反远比,将一台装有该镜头的投影机置于银幕上沿就可以将画面投满整个球带幕。文中给出了大视场、大反远比光学系统的构造方法,对大视场非相似成像系统中的畸变、场曲和相对照度进行了分析和讨论,并给出了改善照度均匀性的有效途径。该镜头以8片透镜的低成本结构满足了4 k分…
View article: The Design and Experiment of Vertical Variable Cavity Base Fertilizer Fertilizing Apparatus
The Design and Experiment of Vertical Variable Cavity Base Fertilizer Fertilizing Apparatus Open
A vertical variable cavity organic fertilizer and compound fertilizer apparatus were designed according to tobacco farming requirements to overcome issues of unstable fertilizer discharge and blocking in the fertilizer disk of an existing …
View article: Handheld Micro tiller time-frequency characteristic and vibration isolation measures
Handheld Micro tiller time-frequency characteristic and vibration isolation measures Open
The handheld micro tiller is a typical small agricultural machine. It vibrates severely during the rotary tillage process, which harms the users’ health. It is necessary to study its vibration characteristics and propose vibration isolatio…
View article: Flexible and Robust Nanofiber Sponge with Superior Capacity to Transport Water for Efficient and Sustained Solar-Driven Interfacial Evaporation
Flexible and Robust Nanofiber Sponge with Superior Capacity to Transport Water for Efficient and Sustained Solar-Driven Interfacial Evaporation Open
View article: Design and experiment of the components for soil flow direction control of hilling machine based on EDEM
Design and experiment of the components for soil flow direction control of hilling machine based on EDEM Open
Cultivation and hilling are important steps in crop field management and provide an important guarantee of crop quality and quantity. With the aim of addressing how the soil flow direction of a traditional cultivation and hilling machine i…
View article: Preparation and Properties of the Urea-Formaldehyde Res-In/Reactive Halloysite Nanocomposites Adhesive with Low-Formaldehyde Emission and Good Water Resistance
Preparation and Properties of the Urea-Formaldehyde Res-In/Reactive Halloysite Nanocomposites Adhesive with Low-Formaldehyde Emission and Good Water Resistance Open
Low-cost urea formaldehyde resin (UF)/reactive halloysite nanotubes (HNTs) nanocomposite adhesive was prepared successfully via in situ polymerization. The HNTs were modified to improve its compatibility with polymer. The XRD and FTIR resu…
View article: A Novel Combining Strategy of Hierarchically Porous Metal Organic Framework (Hp-Mof) and Cellulose Aerogel to Improve the Co2 Absorption Performance
A Novel Combining Strategy of Hierarchically Porous Metal Organic Framework (Hp-Mof) and Cellulose Aerogel to Improve the Co2 Absorption Performance Open
View article: High-performance asymmetric supercapacitor made of NiMoO <sub>4</sub> nanorods@Co <sub>3</sub> O <sub>4</sub> on a cellulose-based carbon aerogel
High-performance asymmetric supercapacitor made of NiMoO <sub>4</sub> nanorods@Co <sub>3</sub> O <sub>4</sub> on a cellulose-based carbon aerogel Open
In this study, a new nanoporous material comprising NiMoO 4 nanorods and Co 3 O 4 nanoparticles derived from ZIF-67 supported by a cellulose-based carbon aerogel (CA) has been successfully synthesized using a two-step hydrothermal method. …
View article: Fisheye lens design based on small-sized projector with 4k resolution
Fisheye lens design based on small-sized projector with 4k resolution Open
基于一款4k分辨率小型投影机，设计了一种低成本、易加工的小口径高分辨率鱼眼投影镜头。通过合理选型、分配光焦度、设置光栏位置、调整镜片形状、材料优选及匹配等途径，在镜片数量较少的情况下对像差进行了充分的校正。该镜头仅由9片透镜组成，视场角为175°，F#为2.2，后工作距达到39.8 mm，在奈奎斯特频率131 lp/mm处，1.0视场MTF值达到0.3，其余视场MTF值均达到0.43以上，满足了该机型的使用需求。对镜头的各项公差进行了蒙特…
View article: Construction of NiMoO<sub>4</sub> nanorods@ZIF-67 derived Co<sub>3</sub>O<sub>4</sub> supported on cellulose based carbon aerogel for asymmetric supercapacitors
Construction of NiMoO<sub>4</sub> nanorods@ZIF-67 derived Co<sub>3</sub>O<sub>4</sub> supported on cellulose based carbon aerogel for asymmetric supercapacitors Open
In this study, NiMoO4 nanorods @ ZIF-67 derived Co3O4 material supported by cellulose based carbon aerogel (CA) is successfully synthesized by two-step hydrothermal method. Benefitting from hierarchical porous structure, large specific sur…
View article: Monolithic zirconia aerogel from polyacetylacetonatozirconium precursor and ammonia hydroxide gel initiator: formation mechanism, mechanical strength and thermal properties
Monolithic zirconia aerogel from polyacetylacetonatozirconium precursor and ammonia hydroxide gel initiator: formation mechanism, mechanical strength and thermal properties Open
Large-sized, high-transparent and monolithic ZrO2 aerogel was prepared by a synthetic zirconium precursor.
View article: Rolling mill chatter mechanism based on the unsteady lubrication performance
Rolling mill chatter mechanism based on the unsteady lubrication performance Open
The unsteady lubrication is one of the major causes for self-excited vibration in rolling. But it is difficult to build a rolling chatter model which considers the unsteady lubrication state in roll bite. Using the regression exponential f…
View article: Time Delay Effect on Regenerative Chatter in Tandem Rolling Mills
Time Delay Effect on Regenerative Chatter in Tandem Rolling Mills Open
The interstand tension coupling effect and strip gauge variation passed on to next stand with time delay are the main causes for regenerative chatter in tandem rolling mills. To study the effect of different factors on the stability of tan…
View article: Optical design of digital fish-eye lens for dome-screen projector
Optical design of digital fish-eye lens for dome-screen projector Open
采用非相似成像原理，利用Zemax光学软件设计了一款适用于1-60 cm(0.63英寸)3LCD数字投影机的球幕投影数字鱼眼镜头。镜头结构是一种反远距型光学结构，由5组6片球面透镜组成，具有结构简单、易加工等特点。镜头全视场角为180，焦距为3.28 mm，相对孔径为1/1.9，后工作距离为35.8 mm，光学总长为196 mm。镜头具有较高的成像质量，在50 lp/mm处，各个视场的MTF值均大于0.4，最大垂轴色差为4.5 m，全视场的F-theta畸变绝对值小于3%，…