Multiview intelligent networking based on the genetic evolution algorithm for precise 3D measurements.

The use of multi-visual network 3D measurements is increasing; however, finding ways to apply low-cost industrial cameras to achieve intelligent networking and efficient measurement is a key problem that has not been fully solved. In this paper, the multivision stereo vision 3D measurement principle and multivision networking process constraints are analyzed in depth, and an intelligent networking method based on the genetic evolution algorithm (GEA) is proposed. The genetic operation is improved, and the fitness function is dynamically calibrated. Based on the visual sphere model, the best observation distance is assigned as the radius of the visual sphere, and the required constraints are fused to establish an intelligent networking design of the centering multivision. A simulation and experiment show that the proposed algorithm is widely feasible, and its measurement accuracy meets the requirements of the industrial field. Our multiview intelligent networking algorithms and methods provide solid theoretical and technical support for low-cost and efficient on-site 3D measurements of industrial structures.

Hierarchical Nanorods of MoS2 /MoP Heterojunction for Efficient Electrocatalytic Hydrogen Evolution Reaction.

Hierarchical nanostructures with tailored component and architectures are attractive for energy-related applications. Here, the delicate design and construction of hierarchical MoS2 /MoP (H-MoS2 /MoP) nanorods for the hydrogen evolution reaction (HER) are demonstrated. This multiscale design rationally combines the compositional and structural advantages of MoS2 /MoP heterojunction into a hierarchical architecture, which can modulate electronic structure of S, remarkably facilitating the electrocatalytic HER. Benefitting from their unique architecture and electronic structure, the H-MoS2 /MoP nanorods exhibit excellent performance for HER with ultralow overpotential of 92 mV at current density of 10 mA cm-2 in 1 m KOH and high stability. This work not only provides an efficient approach to constructing hierarchical heterojunctions, but also a multiscale strategy for all-round regulation of the electronic structure and hierarchical morphology of nanomaterials for energy-related applications.

MOF-derived Mn doped porous CoP nanosheets as efficient and stable bifunctional electrocatalysts for water splitting.

Searching for highly active and stable bifunctional electrocatalysts for overall water splitting, e.g., for both the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER), is dominating in terms of bringing future renewable energy storage and conversion processes to reality. In this work, a kind of two-dimensional ultrathin manganese (Mn) doped polyhedral cobalt phosphide (Mn-CoP) has been synthesized via the etching-carbonization-phosphidation of Co-centered metal-organic frameworks. The as-prepared porous Mn-CoP nanosheets had a larger specific surface area and higher porosity, furnishing them with more plentiful catalytically active sites than their counterpart hollow CoP and Mn-CoP nanoparticles, and thus showed much better electrocatalytic activity for both HER and OER in acidic and alkaline media. In addition, the Mn-CoP nanosheets also demonstrated excellent durability after long-term operation. These high performances are attributed to the synergistic effects of the CoP nanosheets with intrinsic activity, the graphitic carbon and the controllable electronic structure doped by Mn and N elements. This synthetic methodology of using a classical MOF as a precursor to build a new 2D sheet-like composite may create opportunities to search for highly efficient and robust non-precious metal catalysts for energy-related reactions.

[Effect of glucosamine hydrochloride capsules on articular cartilage of rabbit knee joint in osteoarthritis].

OBJECTIVE: To access the protective effects of glucosamine hydrochloride capsules (OTL) on articular cartilage in osteoarthritis of rabbit. METHODS: Thirty-six New Zealand white rabbits were divided randomly into three groups (n=12): sham group (group A), anterior cruciate ligament transection (ACLT)/normal saline group (group B), and ACLT/OTL group (group C). Rabbits in groups B, C received ACLT on the right knee. Rabbits in group A were not given ACLT as control. Group C received a daily administration of OTL at a dose of 150 mg/kg of body weight for 12 weeks; in contrast, group B received normal saline at the same dose. All rabbits were sacrificed after 12 weeks. The right femoral condyle were removed and observed at pathologic changes with HE staining and graded by Mankin's scale, the expression level of transforming growth factor beta 1 (TGF-beta 1) and interleukin 1 beta (IL-1 beta) were detected by immunohistochemical staining. RESULTS: All rabbits survived at the end of experiment and incision healed well. The gross observation showed that joint synovia increased and articular surface was smooth and integrity in group A; that ulcer was observed on the articular surface of group B; and that articular surface was smooth and integrity in group C. There were significant differences in articular cartilage scores between 3 groups (P < 0.05). The histological observation showed that the articular cartilage had normal structure and the cells arranged regularly in group A; that the articular cartilage became thin and the cells arranged irregularly in group B; and that the cells arranged with a clear layer and had regular shape in group C. The Mankin scores were 1.04 +/- 0.13, 7.97 +/- 0.12, and 2.81 +/- 0.36 in groups A, B, and C, respectively; showing significant difference between 3 groups (P < 0.05). The result of immunohistochemistry showed that the expressions of TGF-beta 1 were 50.62 +/- 1.51, 24.81 +/- 1.28, and 41.57 +/- 1.69 and the expressions of IL-1 beta were 13.12 +/- 1.21, 62.53 +/- 2.37, and 30.67 +/- 1.28; showing significant differences between 3 groups (P < 0.05). CONCLUSION: A daily administration of OTL at a dose of 150 mg/kg for 12 weeks can partially decrease the expression levels of IL-1 beta and increase the expression levels of TGF-beta 1, which delays the development of osteoarthritis.