Preliminary studies on controlling Oulema oryzae, soybean aphid, and cucumber aphid with Mieshabi�

: This paper reported the insect control experiments with a newly developed insecticide, “Mieshabi”. Results indicated that “Mieshabi” was very effective on controlling Oulema oryzae, soybean aphid, and cucumber aphid. Thus, it is a good insecticide at present and can be applied in agricultural practiceOriginating text in Chinese.Citation: Wang, Wenduo, Guan, Fengling. (1993). Preliminary studies on controlling Oulema oryzae, soybean aphid, and cucumber aphid with Mieshabi�. Journal of Jilin Agricultural Sciences, 43(4), 39-87

Dynamics of multi-valued retarded p-Laplace equations driven by nonlinear colored noise

This paper mainly considers the long-term behavior of p-Laplace equations with infinite delays driven by nonlinear colored noise. We firstly prove the existence of weak solutions to the equation, but the uniqueness of solutions cannot be guaranteed due to the lack of Lipschitz continuity conditions, and thus generate a multi-valued dynamical system. Moreover, the regularity of solutions is also proved. Then we prove the existence of a pullback attractor. Subsequently, the measurability of the pullback attractor and the multi-valued dynamical system are also proved

Multi-objective optimization design for a battery pack of electric vehicle with surrogate models

In this investigation, a systematic surrogate-based optimization design framework for a battery pack is presented. An air-cooling battery pack equipped on electric vehicles is first designed. Finite element analysis (FEA) results of the baseline design show that global maximum stresses under x-axis and y-axis transient acceleration shock condition are both above the tensile limit of material. Selecting the panel and beam thickness of battery pack as design variables, with global maximum stress constraints in shock cases, a multi-objective optimization problem is implemented using metamodel technique and multi-objective particle-swarm-optimization (MOPSO) algorithm to simultaneously minimize the total mass and maximize the restrained basic frequency. It is found that 2nd order polynomial response surface (PRS), 3rd order PRS and radial basis function (RBF) are the most accurate and appropriate metamodels for restrained basic frequency, global maximum stresses under x-axis and y-axis shock conditions respectively. Results demonstrate that all the optimal solutions in Pareto Frontier have heavier weight and lower frequency compared with baseline design due to the restriction of global maximum stress response. Finally, two optimal schemes, “Knee Point” and “lightest weight”, satisfied both of the stress constraint conditions, show great consistency with FEA results and can be selected as alternative improved schemes

Status and improvements of transforming scientific research achievements into teaching resources in universities

There are many practical difficulties in the concrete implementation of transforming scientific research results into teaching resources. Through analyzing the existing transformation forms and problems, a comprehensive transformation model is discussed, and a comprehensive evaluation system covering teachers and students is established. Establish a guarantee mechanism from multiple channels such as capital investment, system guarantee, and performance reward, escort the transformation of scientific research results into teaching resources, and promote universities to strengthen the talents training

Low-threshold room-temperature AlGaAs/GaAs nanowire/single-quantum-well heterostructure laser

Near-infrared nanowire lasers are promising as ultrasmall, low-consumption light emitters in on-chip optical communications and computing systems. Here, we report on a room-temperature near-infrared nanolaser based on an AlGaAs/GaAs nanowire/single-quantum-well heterostructure grown by Au-catalyzed metal organic chemical vapor deposition. When subjects to pulsed optical excitation, the nanowire exhibits lasing, with a low threshold of 600 W/cm2, a narrow linewidth of 0.39 nm, and a high Q factor of 2000 at low temperature. Lasing is observed up to 300 K, with an ultrasmall temperature dependent wavelength shift of 0.045 nm/K. This work paves the way towards ultrasmall, low-consumption, and high-temperature-stability near-infrared nanolasers

Research on the strategies of scientific research feeding back teaching in mechanical engineering

With the increasing attention paid to the concept of scientific research back-feeding teaching in colleges and universities, the mechanical engineering has put forward higher requirements for the cultivation of applied talents in the new era. This paper analyzes the problems existing in scientific research back-feeding teaching of the mechanical engineering, and puts forward improvement measures from the aspects of policy support, mechanism operation, reward incentive and team building, so as to promote the role of scientific research in promoting teaching and improve the talents cultivation quality

The Effect of Sulfuric Acid Treatment on Hard Seeds of \u3cem\u3eMelilotoides ruthenica\u3c/em\u3e

Melilotoides ruthenica is a perennial legume, and is characterized by cold resistence, drought resistence and high protein content (Luo 1993). It is used for hay and as a pasture plant, but because a high percentage of the seed are hard-seeded to allow reliable germination, seedling production is hindered (Du et al. 2007). The objective of this research was to study the effect of sulfuric acid treatment on hard-seeds of M. ruthenica and determine the optimal treatment concentration and treatment time