Control Techniques of Chinese Chestnut Yellow Crinkle

This paper initially delineates the symptoms,characteristics,and hazards associated with Chinese chestnut yellow crinkle,as well as the transmission and infection pathways of the disease.Additionally,it proposes the prevention and control strategies of the disease,including rigorous investigation and monitoring of the disease,enhanced monitoring of seedlings and scions,and integrated disease management techniques to promote the tree s health and vitality.These strategies serve to inform the prevention and control of Chinese chestnut yellow crinkle in production.

Experimental study on permeability and strength characteristics of MICP-treated calcareous sand

Calcareous sand is the main fill material for island reclamation projects,but untreated calcareous sand might not be used as a reclamation fill due to its poor mechanical properties.Microbial induced calcite precipitation(MICP)was directly used to consolidate calcareous sands.One-dimensional sand column tests were conducted to identify the optimized solutions and to investigate the effects of cement solution concentration,relative density,and consolidation frequencies on the permeability and mechanical properties of MICP-treated calcareous sands.Finally,three-dimensional model tests were carried out to investigate the effective consolidation range of microbially treated calcareous sands.The results show that the MICP-treated calcareous sand shows a reduction in the permeability of the sample,while the calcium carbonate cementation and its filling effect improves the mechanical properties of the soil.The one-dimentional test results show that the effective values for cement solution concentration,relative density,and consolidation frequencies range from 0.5 mol/L to 1.5 mol/L,30%-70%,and 5-15 times.The consolidation frequencies have the greatest influence on the permeability and strength properties of the treated calcareous sand.A quadratic polynomial regression model for permeability and strength was established through response surface analysis,and the regression model proved to be highly accurate and reliable through testing.In three-dimentional tests,the consolidation range tends to move downwards in a trapezoidal shape,showing a"big bottom and small top"pattern,with a consolidation range of approximately 34 times the diameter of the pipe.This study serves as a reference for selecting consolidation parameters for subsequent tests and applications of MICP-treated calcareous sands.

Present Situation of Enhanced Recovery after Surgery in Shiyan Taihe Hospital and Plan of Establishing Strategic Alliance with General Surgery Department

The accelerated rehabilitation specialist surgery and general established strategic alliance plan of Taihe hospital is introduced in the paper.The background of strategic alliances established,and the political,environmental and technological factors are introduced,and stakeholder analysis and management plan,risk analysis and management plan are made.Furthermore,a junior coalition problem that may occur in the process and the resulting deep thinking is analyzed,to provide the reference and enlightenment for the management of hospital and establishment of strategic alliance.

A General and Effective Method for Wall and Protrusion Separation from Facade Point Clouds

As a critical prerequisite for semantic facade reconstruction,accurately separating wall and protrusion points from facade point clouds is required.The performance of traditional separation methods is severely limited by facade conditions,including wall shapes(e.g.,nonplanar walls),wall compositions(e.g.,walls composed of multiple noncoplanar point clusters),and protrusion structures(e.g.,protrusions without regularity,repetitive,or self-symmetric features).This study proposes a more widely applicable wall and protrusion separation method.The major principle underlying the proposed method is to transform the wall and protrusion separation problem as a ground filtering problem and to separate walls and protrusions using ground filtering methods,since the 2 problems can be solved using the same prior knowledge,that is,protrusions(nonground objects)protrude from walls(ground).After transformation problem,cloth simulation filter was used as an example to separate walls and protrusions in 8 facade point clouds with various characteristics.The proposed method was robust to the facade conditions,with a mean intersection over union of 90.7%,and had substantially higher accuracy compared with the traditional separation methods,including region growing-,random sample consensus-,multipass random sample consensus-based,and hybrid methods,with mean intersection over union values of 69.53%,49.52%,63.93%,and 47.07%,respectively.Besides,the proposed method was general,since existing ground filtering methods(including the maximum slope,progressive morphology,and progressive triangular irregular network densification filters)can also perform well.