In order to emphasize the poor response (in microvolts) through the lining, the evaluation indicators tend to be subtracted by the sign, which can be computed in the case of only having a base tube, yielding differential PECT signals. The peak voltage of this differential signal is selected to characterize the lining wall thinning and interface debonding because of its distinguishable and linear variation. Research confirmation is also carried out on a double-walled specimen simulated by a mix of a Q235 casing pipeline and SS304 tubes of different sizes. The experimental results fundamentally agree with the analytical forecasts. The peak value of the PECT signal has an ascending and descending variation aided by the upsurge in the residual liner wall thickness and debonding gap, respectively, even though the negative peak price reveals opposing modifications. The peak value displays a larger sensitivity as compared to bad top worth. The proposed method reveals potential promise in practical applications when it comes to evaluation of the inner defects in BLP lines.Cement-based cementitious products Hepatocellular adenoma take a central place within the building industry, nevertheless the problem of high carbon dioxide(CO2) emissions from concrete manufacturing has attracted global interest. To generally meet this challenge, finding low-carbon alternative materials has become a top concern within the analysis of the latest building products. At exactly the same time, the problem of huge amounts of lithium slag piling up has to be resolved, and resource usage has grown to become its potential way out. In this study, the volcanic ash task of lithium slag had been activated by composite activation method of high-temperature calcination and salt silicate, also it was utilized as an alternative combine to cement. The Box-Behnken design and response area strategy (BBD-RSM) was employed to optimize the proportion of activated lithium slag composite cement-based cementitious products, and superior brand-new solid waste cementitious materials were prepared. The outcomes show that triggered lithium slag composite cementitious materials activated li promoting the low-carbon development of the construction industry.Several overloaded-induced overturning incidents of girder bridges with single-column piers have occurred in the past few years, resulting in considerable casualties and financial losings. Temperature, in addition to overloading, may also play a role in exacerbating bridge overturning. To investigate the association between temperature and connection overturning, an explicit finite factor model (EFEM) of a three-span tangible curved continuous bridge thinking about nonlinearities was developed to simulate total failure. The effects of consistent and gradient temperatures from the total overturning stability of curved and straight bridges were examined in line with the EFEMs. Moreover, the temperature-bridge coupling model and temperature-vehicle-bridge coupling model had been bioactive packaging used to analyze how gradient temperature influences connection overturning. The outcomes show that the general overturning collapse of a bridge employs four phases stabilization, transition, risk and overturning. Variants in uniform temperature from -30 °C to 60 °C had a negligible impact on the ultimate vehicle body weight for connection overturning, with a variation of not as much as 1%. Once the gradient temperature ranged from -30 °C to 60 °C, curved bridges reveal significantly less than a 2% variation in ultimate vehicle weights, when compared with a range of -6.1% to 11.7per cent for straight bridges. The torsion caused by positive gradient temperature in curved bridges can exacerbate bridge overturning, while negative read more gradient temperature in straight bridges often leads the girder to ‘upward warping’, assisting girder split from bearings. Monitoring the girder rotation direction and straight response power of bearings can serve as important indicators for contrasting the security of bridges.As an important section of head security equipment, study regarding the product and structural application of helmet liners has always been one of many hotspots in the field of helmets. This report very first analyzes typical helmet lining products, including standard polystyrene, polyethylene, polypropylene, etc., also recently emerging anisotropic products, polymer nanocomposites, etc. Secondly, the style concept of the helmet lining structure is talked about, like the usage of a multi-layer construction, the addition of geometric irregular bubbles to improve the vitality absorption effect, plus the introduction of the latest manufacturing processes, such as additive production technology, to comprehend the planning of complex frameworks. Then, the use of biomimetic structures to helmet liner design is reviewed, like the design of helmet liner structures with increased power consumption properties centered on biological structure structures. On this basis, we suggest expanding the thought of bionic structural design into the fusion of plant stalks and pet skeletal structures, and incorporating additive production technology to significantly lower power reduction during flexible yield energy absorption, hence building a reusable helmet that provides an investigation path for future helmet liner materials and architectural programs.Various items of carbon fibers (CFs) and potassium titanate whiskers (PTWs) were included with an Fe-based impregnated diamond little bit (IDB) matrix to improve its adaptability to percussive-rotary drilling. A series of technical tests were performed successively to get the outcomes of the strengthening materials on the properties for the Fe-based IDB samples.