With the increasing shortage of global petroleum resources and the pressure of CO₂ emission reduction, diesel vehicles with good fuel economy and strong power are paid more and more attention. The trend of "diesel" of global automotive power has become increasingly evident. However, compared with gasoline vehicles equipped with three-way catalysts with relatively mature technology, the NO_x and PM in the exhaust of diesel vehicles using lean burn technology have become the bottleneck restricting their popularization and application.

Tungsten tailings are gangue minerals that remain after tungsten concentrate is selected from tungsten ore. The main mineral components include garnet, quartz and mica. For a long time, tungsten tailings, as a kind of solid waste, have been piled on the surface or backfilled into the mine. At present, there is no really efficient and large-scale way to utilize tungsten tailings.

Tungsten oxide inorganic semiconductor materials have been applied in photocatalysis, photochromism, gas sensitivity, electrochromism, and field emission due to their unique physical and chemical properties. Researchers can prepare tungsten oxide micro-nanomaterials with different sizes and morphologies, such as nanosheets, nanorods and hollow spheres.

At present, domestic aero-engine conduits are constrained by selected metal materials, overall design layout, hydraulic and pneumatic functions, and must be manufactured by welding at their joint joints. At present, the types of conduits used in aero-engine welded joints are numerous, and the shape of the conduits themselves. In order to ensure the strength of the weld, manual fusion welding is usually used to connect the joint with the main body of the pipe.

Tungsten alloy counterweight helps the glider fly at a faster optimal speed by increasing the mass of the main body, as well as calming down the speed to make sure it is not influenced by the turbulent air it flies through.

As a phase change material (PCM), vanadium dioxide (VO₂) undergoes a transition from a high temperature tetragonal phase to a low temperature monoclinic phase at around 68° C. This phase change occurs on the order of nanoseconds and is reversible multiple times, accompanied by light, electrical, magnetic and other properties such as refractive index n, reflectivity R and resistivity and a series of mutations. Therefore, vanadium dioxide has broad application prospects in smart window materials, optical storage, photoelectric switches and infrared radiation detectors.

With the increasingly stringent regulations and fuel specifications of the global refining industry, the deep removal of sulfur compounds in fuel oil has attracted more and more attention. In recent years, there have been many different exploration methods, including adsorption desulfurization (ADS). Oxidative desulfurization (ODS) and extractive desulfurization; among them, ODS has attracted great research interest because it can not only react under mild conditions but also exhibit high activity for aromatic sulfur compounds. The key to oxidative desulfurization lies in the synthesis of one. A catalyst having high catalytic activity and easy separation and recovery.

Engine is the heart of modern industrial technology. Adding lubricant additive into engine can reduce friction, wear, heat dissipation, cleaning, sealing and cushioning. Its purpose is to reduce piston wear, reduce energy loss and improve fuel economy.

The front and rear casings of the aero-engine compressor are made of iron-based and nickel-based alloys respectively. During the process of use, the butt joints of the front and rear casings are in a vibrating state, and are prone to impact wear and damage after a period of wear. The life of the front and rear casings is shortened, so it is necessary to prepare a coating with high wear resistance to solve the wear of aviation equipment and prolong the service life of aviation equipment.

The piston and connecting rod mechanism are connected to the crankshaft. The crankshaft bears the pressure generated by the combustion of fuel mixture through the piston and connecting rod, and converts the reciprocating motion of the piston into rotating motion. A sliding component between the crankshaft and the connecting rod becomes a bearing, which together with the oil forms a sliding bearing.