Research on the factors influencing the premium rate of the Inherent Defects Insurance

This paper introduces the composition of the premium rate of Inherent Defects Insurance, and analyzes the the factors influencing the premium rate of the Inherent Defects Insurance

Analysis of moral hazard in Engineering agent construction system

Analyze the moral hazard issues in the construction agency system, and enumerate the performance of moral hazard. Deeply analyze the causes, start with strengthening supervision and perfecting incentive measures, eliminate the impact of moral hazard, and give play to the advantages of agent construction

Effect of Biomass Ash on the Properties and Microstructure of Magnesium Phosphate Cement-Based Materials

The disposal of biomass ash (BA) will be of great importance for environmental protection and sustainability, and the aim of this study is to analyze the feasibility of the resourceful use of biomass ash in civil engineering materials. The effects of the content and type of biomass ash on the flowability, setting time, compressive strength, flexural strength, bonding strength, and drying shrinkage of magnesium phosphate cement (MPC) mortar were investigated. In addition, the effects of BA on the hydration and microstructure of MPC were investigated by X-ray diffraction (XRD), thermogravimetry, mercury intrusion porosimetry (MIP), and scanning electron microscope (SEM). The results showed that BA significantly affects the flowability and setting time of MPC mortar. The compressive and flexural strength of MPC mortars decreases with increasing amounts of BA. The drying shrinkage of MPC mortar specimens increases exponentially with the increase of BA content. The incorporation of BA will reduce the bonding strength of the MPC mortar, which is associated with increased drying shrinkage. The incorporation of BA into MPC results in low hydration product generation and poor pore structure. The incorporation of BA into MPC has a significant effect on the microstructure morphology and the hollow columnar-like hydration product may be formed by the reaction of BA with MgO in the paste

Janus interpenetrating structure based on optimized water supply for solar-driven water evaporation

International audienceRealizing a balance between water supply and the evaporation of photothermal evaporators is a valuable means to enhance the solar–thermal evaporation rate, but practical obstacles remain. The interfacial mechanics of a Janus evaporator with an interpenetrating structure are proposed to achieve a dramatic improvement in the solar–thermal evaporation rate. The Janus evaporator is composed of a membrane material of Cu1.96S grown in situ on a foamed copper skeleton ([email protected]) and a graphene oxide/sodium alginate aerogel (GA), through an interfacial freeze-drying shape technology. In this unique architecture, the superhydrophilic GA can be stretched into the hydrophobic [email protected] interior to build an interpenetrating network architecture ([email protected]/GA), thereby adjusting the Laplace pressure and constraining capillarity. Due to the optimized water supply of interfacial mechanics, the [email protected]/GA evaporator achieves an evaporation rate of 1.79 kg m−2 h−1 under 1 sun irradiation and exhibits superior salt resistance. This provides a rationale for the reasonable design of the structure of the solar–thermal evaporators

Comprehensive Investigation of the Differences of the Roots of Wild and Cultivated Mirabilis himalaica (Edgew) Heim Based on Macroscopic and Microscopic Identification Using HPLC Fingerprint

Mirabilishimalaica (Edgew) Heim (MH) is an important Tibetan medicine with demonstrated medicinal efficacy and promising developmental value. A previous study of MH was limited to vague morphological and microscopic descriptions, restricting its clinical application and further development as a medicine. The goal of this study was to comprehensively characterize wild and cultivated products of MH using macroscopic and microscopic identification using HPLC fingerprint. The results revealed that the cultivated and wild MH exhibited differences in macroscopic and microscopic characteristics and chemical components. This analysis can facilitate the establishment of a more comprehensive quality evaluation method for MH. These results provide the basis for clinical applications and the improvement of quality standards of MH as a step towards modernization of Tibetan medicine