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Many materials such as glucose, sucrose, fructose and biomass materials including wood, starch, cane sugar, grain sorghum and agricultural wastes have been used to produce levulinic acid [4].
ZSM-5 has also been applied in catalytic cracking of vacuum gas–oils with the intention of increasing the gasoline octane numbers and maximising the yields of propylene and butylenes.

A lubricating liquid film under high-speed shaping is continuously destroyed by abrasive grains of the grinding wheel, which causes disruption of the continuity and stability of the flow; stochastic currents are formed which flow from the higher pressure area towards the lower pressure area.
In such cases, a great number of hydrodynamic equations are to be solved and the results obtained have to be averaged by statistical methods [3].

The number of cracks rises (relative I4 growth of a few percent is similar for all samples), and then the fragments of the template leave the silica pore structure.
The grain sizes of the investigated materials are small (below 0.1 µm) comparing to the path of o-Ps migration which is of 1 µm or more.

This is consistent with the relationship of B=µNI, where B is magnetic induction, µ is a coefficient, N is the number of turns of the coil, and I is the current.
However, in order to avoid the influence of grain size being masked by the effect of a large gate, a small gate was used in the current experiment, as shown in Fig. 1.

For a zero-mean stationary Gaussian random response process, the power reliability[9,10] based on the first excursion failure criterion can be expressed as Eq.2 and Eq.3 Unilateral boundary model (2) Bilateral boundary model (3) Deep & ultra-deep well reliability for drill string system The drill string is composed of a number of drill pipe, drill collars and drilling tools.
There are a lot of pores, micro-cracks and grain boundaries in carbonate rock which reduced the mechanical strength and stability.

They maintained that the number of the unpaired d electrons are relevant to diamond tool wear.
Kang, Monocrystal Silicon Nanometric Grinding Process of grinding grain wear of the molecular dynamics simulation.

At 2min, since the sufficient diffusion of carbon atoms, a number of well-distributed cementites appear showing almost entirely strips, and getting longer and thicker.
However some smaller diamond crystal grains can be found on the interface between the catalyst and graphite.

The number of heating cycles at temperatures up to 1000°C was 17.
Mo-rich grains are formed on the thin-film before heating due to the extraction of Mo atoms from the thin-film and Mo sites in the thin-film are substituted by Pt atoms.

Recently many efforts have been devoted to fabricate Pd–Ag nanostructures with well-defined morphology because the grain size and morphology have a great impact on the chemical and physical properties of metal nanomaterials [2].
Ceria has been claimed to be a strong promoter of structural and electronic properties of catalysts both in the automotive pollution control and for a number of industrial processes, such as purification and reforming of CH4, steam reforming of CO, CO2, methanol, and diethyl ether, as well as PROX reaction.

Economic development level indicators which we choose are the local fiscal budget revenue, local fiscal budget expenditure, financial institutions at the end of the balance, the balance of urban and rural residents savings, at the end of the financial institutions the loan balance, total grain output, industrial enterprises above designated size output value, export volume, the number of ordinary high school full-time teachers, the net income of the farmers, 10 indicators in all.