Anhui Conch Design and Research Institute of Building Materials (China)

The cement industry will be officially regulated by China’s national carbon market. Authenticity and accuracy of emission data are prerequisites and the foundation for ensuring the healthy and stable operation of the market. At present, China’s carbon market mainly adopts the Calculation-Based Method (CBM) for data accounting. However, in the cement sector, this method faces challenges due to the inherent complexity of both raw materials and fuels, making it difficult to obtain accurate emission data through CBM alone. Therefore, regulatory authorities are promoting the installation and application of the Continuous Emission Monitoring System (CEMS) by enterprises. Pilot studies, however, have revealed considerable discrepancies between the data from the two methods. In this study, a combined data monitoring and accounting method was proposed, in which CBM and CEMS were combined to improve emission data quality. The actual operational and emission data from a case enterprise was taken as an example, and this study conducted systematic analysis and research on data collection and preprocessing, operating condition classification, correlation model construction, and abnormal data diagnosis. The results revealed that this combined method can effectively improve the degree of correlation between CBM and CEMS carbon emissions. Moreover, higher accuracy of abnormal data identification can be achieved through statistical testing. This combined monitoring method not only strengthens data tamper-resistance at the enterprise level but also has the potential to reduce regulatory oversight costs, thereby providing reliable technical support for emission data quality control.

Acute compartment syndrome (ACS) is a critical condition resulting from increased intra-compartmental pressure, causing tissue ischemia and necrosis. ACS following cardiovascular surgery is rare but catastrophic. Postoperative sedation and analgesia often obscure classic symptoms, delaying diagnosis. This underscores the importance of vigilance and early detection, particularly in high-risk scenarios such as prolonged extracorporeal circulation and femoral artery cannulation. Enhanced monitoring, including tissue oxygen saturation and transcutaneous oxygen pressure, may facilitate timely diagnosis. We report a 56-year-old male who developed ACS after valve replacement surgery involving femoral artery cannulation for cardiopulmonary bypass. Approximately 12h postoperatively, the patient exhibited severe lower limb swelling, mottling, and diminished dorsalis pedis pulse. Laboratory findings revealed elevated myoglobin and creatine kinase levels. Diagnosis was confirmed via clinical and ultrasound evaluation, prompting emergent fasciotomy. Postoperative management included wound care, renal replacement therapy, and skin flap reconstruction. At 6 months follow-up, the patient achieved complete functional recovery of the affected limb. ACS is a rare but severe complication of cardiovascular surgery. This case highlights the necessity for heightened vigilance, early recognition, and timely intervention to mitigate adverse outcomes. Further studies are needed to validate and establish standardized monitoring protocols and management strategies, including early use of distal perfusion techniques, to improve surgical safety and patient outcomes.

Four kinds of novel BODIPY derivatives were designed to initiate the free radical polymerization of acrylates under typical visible LED irradiation and their application in 3D printing. • New BODIPY dyes were designed to initiate free radical polymerization. • Photopolymerization was conducted under long-wavelength light irradiation. • Corresponding photochemical mechanisms were well discussed in details. • 3D products were printed with yellow fluorescence. Efficient photopolymerization activated by photoinitiators or photoinitiating systems (PISs) under visible light irradiation, especially at long wavelengths, has remained as a challenging research focus. In this work, four novel boron dipyrromethene (BODIPY) derivatives with high fluorescence properties were systematically investigated as light-harvesting organic dyes, which exhibited remarkable photoinitiation capacities under long-wavelength light irradiation. Markedly, these BODIPY derivatives efficiently induced the free radical photopolymerization of acrylates under irradiation from violet-to-green light-emitting diodes (LEDs), benefiting from the construction of three-component PISs comprising an amine and an iodonium salt. The high photoreactivity of these BODIPY dyes was assessed through steady-state photolysis and excited-state fluorescence quenching analyses, while the corresponding photochemical parameters were attained by theoretical calculations under the density functional theory (DFT) method. In order to expand potential application areas, photopolymerized acrylate monomers by direct laser writing experiments using the investigated PIS, resulting in 3D patterns with smooth surfaces. high spatial resolution and significant fluorescence were successfully fabricated, providing a promising opportunity for developing efficient PIs with high fluorescence in photo-curing 3D printing area.

Abstract Needle‐like nanocrystalline mullite powders were prepared through the molten salt process at the temperature of 900°C using coal gangue as raw material. Then, mullite‐based composite ceramics were prepared by a conventional solid‐state reaction between in situ synthesized mullite and Al 2 O 3 powders. Effects of Al 2 O 3 content and sintering temperatures on phase compositions, microstructure, and mechanical properties of the mullite‐based composite ceramics were also studied. The results show that mullite content productivity increase from 72% to 95%, as the sintering temperature increased from 1480°C to 1580°C, which led to the improvement in the bulk density and flexural strength of the samples. The three‐dimensional interlocking structure for mullite‐based composite ceramics was obtained by the in situ solid‐state reaction process. The maximum bulk density, flexural strength, and fracture toughness for the sample with 15 wt% Al 2 O 3 content are 2.48 g/cm 3 , 139.79 MPa, and 5.62 MPa··m 1/2 , respectively, as it was sintered at the temperature of 1560°C for 3 h. The improved mechanical properties of mullite‐based composite ceramics maybe ascribed to good densification and increased mullite phase content, as well as to the in situ three‐dimensional network structure. Therefore, the results would provide new ideas for high‐value utilization of coal gangue.