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This provides a valuable tool for quality control and assessment of earthen construction materials.
Compressive strength is an important property to consider in construction materials, earthen materials included.
Radeljić, Earthen construction materials as enabler for circular construction, Iop Conference Series Earth and Environmental Science 1078(1) (2022) 012065 [4] C.
Ighalo, Predicting the compressive strength of concrete by ultrasonic pulse velocity, IOP Conference Series: Materials Science and Engineering, vol. 1036, no. 1, (2021) 012053 [9] B.
Corbu, Opportunities regarding the innovative conservation of the romanian vernacular urbanistic heritage, International Journal of Conservation Science 14(3) (2023) 913-936

Fig. 2 shows the X-ray diffraction patterns of Al2O3/TiC/CaF2 ceramic materials prepared by hot pressing at 1700℃.
While, a large amount of added lubricant affects the strength of materials, and the mechanical strength of the material is low.
(a) Little solid lubricant (b) Appropriate amount of solid lubricant (c) Much solid lubricant Fig.3 Combination ways of ceramic matrix and solid lubricant The structure of the self-lubricating ceramic tool materials is appreciated as showed in Fig.3 (b).
Thus, the self-lubricating ceramic tool materials can get the continuous ceramic matrix and form reticulate structures, and the solid lubricant is coated in the reticulate structures.
Design and development of composite ceramic cutting tool materials based on the cutting reliability.

Introduction As the development of the modern technology and science, eddy testing technology is widely used in industrial manufacture as well as science study due to its various advantages over the other detection methods[1].
At the same time, the certain type of engine small hollow blade is made by weak magnetic conductive material while ferromagnetic materials are used for basal lining.
At the same time, we need to choose the excitation frequency by differentiating different kinds of eddy sensitivity of different blade materials.
Research on the correlation between measured material properties and output of eddy current sensor[J].
International Journal of Applied Electromagnetics and Mechanics, 2008, 43: 2–7

Zhao: Gansu Agricultural Science and Technology, (2004) No.11, pp.22-23
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Zhao: Methods for Experimental Design (Science Press, China 2006)
Ren: Design and Optimization of Experiment (Science Press, China 2009).

[4] K.R Tsang, Moisture distribution in sludges, Water Science and Technology. 22 (1990) 135-142
J., Moisture distribution in sludge: Effects of polymer conditioning, Journal of Environmental Engineering. 125 (1999) 340-345
A., Effect of sludge cell disruption on compactibility of biological sludges, Water Science and Technology. 42 (2000) 119-126
Vaxelaire, Moisture sorption characteristics of waste activated sludge, Journal of Chemical Technology and Biotechnology. 76 (2001) 377-382
Werther, Ogada T., Sewage sludge combustion, Progress in Energy and Combustion Science. 25 (1999) 55-116.

Finite Element Analysis Of Cylinder Involute Tooth Gear Based On ANSYS Youdong Ye1, a Zhebo Zhou2,b 1Anhui University of Science and Technology Depts. of Mechanical Engineering Huainan china 2Anhui University of Science and Technology Depts. of Mechanical Engineering Huainan china aydye@163.com bzhouzhebo@21cn.com Keywords: Involute gear; Stress analysis; ANSYS; Invalidation Abstract.
Fig.1 The drawing of Involute tooth profile Fig.2 The model of cylinder involute gear Finite element analysis in ANSYS Material selection and unit mesh partition Selection of gear material for the 45 steel are analyzed, the mechanical properties of elastic modulus E is1.93×105 Mpa, Poisson's ratio λ is 0.29[3].
Acknowledgements This work was financially supported by Anhui provincial higher school science research project (KJ2010B064) and Anhui provincial natural science foundation project (03044101).
Journal of Xihua University(Natural Science).

The obtained mathematical model of granular medium motion exhibits a certain universality, which, with the provided dependencies, allows describing the dynamic process of medium processing for various types of materials.
The frequencies of natural oscillations of the processing medium layer have been established which depend on the amplitude of its oscillations for various values of its density considering both soft and rigid materials of the processing medium, as well as materials with linear elastic properties. 3. 
Figlus, The effect of selected parameters of vibro‐abrasive processing on the surface quality of products made of 6082 aluminium alloy, Materials 2019, 12 (2019) 4117. https://doi:10.3390/ma12244117
Sas, V/ Dutka, Residual Stresses Formed by Vibration-Centrifugal Hardening, Advances in Materials Science and Engineering. (2020) 1-7. https://doi.org/10.1155/2020/5189473
Senyk, Inverse of an incomplete Beta-function, Ukrainian mathematical journal. 3 (1969) 325-333

The summary of reverse logistics 1.1The definition of reverse logistics Logistics is to meet consumers’ demand for raw materials, intermediate inventory, the final product and related information from the origin to the effective flow and storage consumption in the planning, implementation and control process.
The definition of reverse logistics originated in foreign countries, the earliest concept of reverse logistics by Stock (1992) put forward, he pointed out: the reverse logistics is a product return, material substitution, reuse of materials, waste processing, processing, repair and remanufacturing process of logistics activities(chart1).
The American Association of logistics management to the definition of reverse logistics is "for the recycling or disposal of waste, in the effective and proper cost of raw materials, WIP, finished goods, and related information, flow and storage to the original output point from the point of consumption, process planning, execution and control, so as to achieve the recovery value and proper disposal. "[1,2] Chart 1.The process of reverse logistic In 2001, China developed national standards, "logistics terms" (GB / Tl 8354.2001), the reverse logistics was classified into two categories: returned logistics and waste material logistics.
The rapid energy consumption, leading to the production cost of enterprises is also increasing, strengthen management of reverse logistics, enterprises can through the recycling of waste re-use items, fully tap the value of residual waste materials or regain the use value of products; at the same time as the recycling of waste products is low price, abundant source, can reduce the cost of raw materials, thus obtained economic benefits at lower cost[4]. 3.2The construction of reverse logistics system of waste products.
For example, in Japan, because the labor cost is relatively high, the overall level of consumption of residents is relatively high, the secondary market is very small, for reverse logistics of waste household appliance is mainly carried out through the recycling of raw materials, mechanization, automation of the whole process of waste household appliances is relatively high, after collecting, isolated by removing, crushing the various components and then again used as the raw material, the raw material price is usually lower, therefore, recycling the waste appliance reverse logistics system utilization rate is low, although the recycling rate is relatively low, can be effective and good to reduce the pollution of the environment, on the long run, this is feasible.

One of the many materials was the plastic as it could reduce the weight and cost, while the performance and lifetime could be reduced [7].
Other materials, e.g., polymers and polyvinyl chloride, were also considered and tested by many scientists, but without distinguished advantages.
Tiwai, International Journal of Energy Research Vol. 32 (2008), p. 1362-1372
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Engel Article in International Journal of Advanced Manufacturing Technology · April 2007 DOI: 10.1007/s00170-006-0644-x
Rasp Advanced Materials Research.
Mezghani et al. / Journal of Materials Processing Technology. 211 (2011) 205–211
[19] The Kinetics and Mechanism of Atmospheric Corrosion Occurring on Tin and Iron-Tin Intermetallic Coated Steels January 2015 Journal of The Electrochemical Society 162(14):C775-C784 DOI10.1149/2.0681514jes
Novosibirsk, Science, 1970, 234 p