Abstract To mitigate pollution caused by levofloxacin (LVF) in aquatic environments, a magnetic catalyst, CoFe 2 O 4 /CoFe@BC (CF@BC), was synthesized using loofah‐derived biochar (BC) as support, through coprecipitation followed calcination at high temperatures. CF@BC utilized for the degradation of LVF aqueous solutions containing peroxymonosulfate (PMS), requiring no additional energy input. demonstrates exceptional catalytic performance, even under acidic conditions, achieving rate 98%...

To facilitate the design, analysis, and optimization of hydrogen liquefaction system, this study developed a MATLAB-based independent simulation program encompassing unit equipment models exergy analysis models. The incorporated REFPROP software to accurately calculate fluid physical properties heat conversion between ortho- parahydrogen. proposed process utilized LN2 precooling, helium Joule-Brayton cryogenic cycle, throttle valve efficiently produce liquid hydrogen. results were rigorously...

Weights of honeycomb sandwich composite structures are strictly controlled in scenarios such as contexts aerospace engineering. However, extensively studied past investigations were partly or completely made aluminum other metallic materials. Sufficient research has not been reported for composites lightweight non-metallic This paper presents an investigation into the mechanical responses Nomex structure a three-point bending test. The mathematical relationship between shear stress...

Microwave energy has been demonstrated to be able assist mechanical rock breaking in geotechnical and mining engineering. The aim of this research is study the influences interaction between microwave rocks on performance disc cutters a TBM (tunnel boring machine). By applying an open-type microwave-induced fracturing apparatus hard rocks, cuboidal basalt samples were subjected irradiation for different times. Full-scale linear cutting tests conducted specimens treatment condition having...

Abstract Seismological studies have revealed heterogeneities at scales of 10–1,000 km in the lower mantle. For first time, we demonstrate here that seismic interferometry ambient noise can be used to detect faint scattered waves. We locate scattering structures depths ~900–1,000 from P‐to‐P wave signals stacks vertical cross‐correlograms dense arrays northeast China. Independently, show this structure produces S‐to‐P converted recordings a deep earthquake. constrain thickness (H), contrasts...

Determining appropriate statistical distributions for modeling text corpora is important accurate estimation of numerical characteristics. Based on the validity test a claim that data conforms to Poisson distribution we propose decomposition model (PDM), count corpora, which can straightly capture each document's multidimensional characteristics topics. In PDM, topic represented as parameter vector with distribution, be easily normalized multinomial term probabilities and document...

In this paper, we focus on recommending an item set to multiple users. Group recommender systems are designed deal with the issue of items for a user group. However, in some scenarios such as gift promotion (different packed together set), album promotion, need consumers' preference rather than specific item. To issue, pioneer Nash equilibrium based Item Recommendation approach (NIGR). Specifically, evaluate each consumer's group two perspectives, interest part from customer herself and...

A modification strategy of the SnO 2 ETLs by incorporating an organic ammonium chloride salt, PACl, to commercial colloidal solution is presented. PCE up 22.27% achieved on n-i-p planar PSCs based PACl incorporated ETLs.

Grouting is an effective technical way for the construction of deep tunnels in unfavorable geological conditions. The fluid-solid-chemical coupling mechanism grouting process analyzed from following three aspects: influence physical properties silica sol on permeability coefficient, dynamic changes porosity and geotechnical media with seepage pressure, governing equations flow mass transfer characteristics. A dynamically changing model nanosilica established, considering grout surrounding...

Solar energy is regarded as the most promising resource, and its application critical to establish global interconnection. The paper sets up AHP (Analytic Hierarchy Process) model for comprehensive assessment of solar technology, assess development technologies, including concentrating thermal power(CSP), photovoltaic(PV) power generation, heating, cooling, fuels, etc. According results, determines priorities, analyzes advantages drawbacks various proposes countermeasures on further...

The energy saving principle, layout and key parameters of low-pressure economizer on coal-fired units are introduced. Taking a 220MW unit as an example, the thermal economy low pressure is evaluated by equivalent enthalpy drop method.

Abstract Taking the flue gas recirculation system of 220MW coal-fired unit as test object, effects operation mode on operating characteristics boiler under different working conditions was studied. The results show: To a certain extent, will reduce efficiency, which is more obvious low load conditions. However, can effectively increase temperatures reheat steam and superheated steam.Comparing economics front rear units recycling system, it be find that net coal consumption 200MW 140MW...

Abstract Taking the flue gas recirculation system of 220MW coal-fired unit as test object, effects operation mode on operating characteristics boiler under different working conditions was studied.The results show: will suppress amount NOx generated in furnace, and best way to restrain formation is send recycled into furnace through primary secondary air simultaneously. The can effectively improve inlet temperature SCR, especially when put operation, effect increasing SCR obviously better...