地方本科院校转型对毕业生就业影响的实证分析--基于全国地方本科院校人才培养与就业调查数据

本文采用2016年全国地方本科院校人才培养与就业调查数据,围绕地方本科院校转型和毕业生就业状况展开实证分析。结果显示,转型试点院校和非转型试点院校在学生个体特征、人才培养过程、就业状况等方面差异明显;学生的活动性参与和主动学习能显著提升其就业起薪,但活动性参与会降低就业对口性,在学生综合实习中,实习指导发挥明显作用;院校转型试点能显著提高毕业生的就业满意度和就业对口性,但并不能有效提高就业比例和就业起薪;院校的转型试点在公私立院校间对就业状况的影响并不一致;院校转型试点对毕业生就业状况的影响主要通过院校人才培养过程和学生院校经历发挥作用。

Effect of Different Pretreatments on Explosion Puffing Drying of Hami Melon at Modified Temperature and Pressure in Xinjiang

This paper studies the influence of three different pretreatments( blanching,citric acid soaking,and Na Cl soaking) on the moisture content,degree of puffing,color,hardness and crispness of Hami melon under explosion puffing drying at modified temperature and pressure in Xinjiang. The results show that using 60 s blanching pretreatment can help to reduce the moisture content of puffed product while maintaining product color; 2. 5% citric acid pretreatment can make products maintain high degree of puffing and crispness,but reduce product color; 2%Na Cl penetrating fluid plays a significant role in maintaining product color,while maintaining crispness.

Novel Hybrid Ligands for Passivating Pb S Colloidal Quantum Dots to Enhance the Performance of Solar Cells

We developed novel hybrid ligands to passivate Pb S colloidal quantum dots(CQDs),and two kinds of solar cells based on as-synthesized CQDs were fabricated to verify the passivation effects of the ligands.It was found that the ligands strongly affected the optical and electrical properties of CQDs,and the performances of solar cells were enhanced strongly.The optimized hybrid ligands,oleic amine/octyl-phosphine acid/Cd Cl2improved power conversion efficiency(PCE)to much higher of 3.72%for Schottky diode cell and 5.04%for p–n junction cell.These results may be beneficial to design passivation strategy for low-cost and high-performance CQDs solar cells.

Genetic Analysis of Resistance to Tomato Gray Mold( Botrytis cinerea)

The study used four tomato varieties,03786( susceptible),05237( susceptible),C2985( resistant) and Wva536( resistant) with different resistance,to formulate combinations according to Griffing( I) complete diallel cross method. And Botrytis cinerea was inoculated to investigate the incidence of gray mold. The results showed that:(1) there were significant differences in disease resistance between different varieties and different combinations.(2) There were significant differences in general combining ability and special combining ability between the tested varieties,and Wva536 and C2985 had a higher general combining ability effect,and were both relatively good parents when formulating resistant combinations. Combinations Wva536 × 03786 and Wva536 × 05237 had the highest special combining ability,and thus have the value of further research and utilization.(3) The additive effect in resistance inheritance was located at the primary position,and partial dominance also existed as well as cytoplasmic effect.(4) The broad-sense heritability and narrow-sense heritability were,respectively,89. 73% and82. 15%,which were higher,indicating that the parents had a greater effect on offsprings. The resistance genes can be expressed in offsprings through gene accumulation,and should be selected in the early generation.

Screening of Tomato Resources Resistant to Tomato Gray Mold

This study was conducted to screen tomato resources resistant to gray mold for the first time by in-vitro stem inoculation method.The results showed that Solanum habrochaites T2-07-316 was highly resistant to gray mold,and had the relative stem infection rate and relative stem rot expansion rate of 0 on the 6^(th) day after inoculation.There were also other seven transgenic common tomato materials which showed higher resistance to gray mold,with a relative stem infection rate in the range of 15.00%-38.33% and a relative stem rot expansion rate in the range of 10.22%-23.57%.Among them,T2-07-337 had the best resistance.

Hybrid Network Model Based on Data Enhancement for Short-term Power Prediction of New PV Plants

This study proposes a hybrid network model based on data enhancement to address the problem of low accuracy in photovoltaic(PV)power prediction that arises due to insuffi cient data samples for new PV plants.First,a time-series gener ative adversarial network(TimeGAN)is used to learn the distri bution law of the original PV data samples and the temporal correlations between their features,and these are then used to generate new samples to enhance the training set.Subsequently,a hybrid network model that fuses bi-directional long-short term memory(BiLSTM)network with attention mechanism(AM)in the framework of deep&cross network(DCN)is con structed to effectively extract deep information from the origi nal features while enhancing the impact of important informa tion on the prediction results.Finally,the hyperparameters in the hybrid network model are optimized using the whale optimi zation algorithm(WOA),which prevents the network model from falling into a local optimum and gives the best prediction results.The simulation results show that after data enhance ment by TimeGAN,the hybrid prediction model proposed in this paper can effectively improve the accuracy of short-term PV power prediction and has wide applicability.

Distributed cooperative voltage control based on curve-fitting in active distribution networks

This study investigates a hybrid hierarchical multi-agent system for distributed cooperative voltage control in active distribution networks. The hybrid hierarchical multi-agent system adopts on-load tap-changing(OLTC) agents for the distribution transformers and feeder control section(FCS) agents for the distributed generators(DGs). The objective is to minimize the voltage deviations over the network. The FCS agents also have the objective of minimizing reductions in DG power output. A least squares method is used for curve fitting to achieve the two objectives. The OLTC agent receives voltage information from the FCS agents to evaluate the state of the voltage in each feeder and the distribution network and cooperates with the FCS agents to control the voltage of the network.The FCS agents exchange the fitted curve parameters and basic information on the DGs with other agents to achieve the objectives. The effectiveness of the proposed distributed cooperative voltage control scheme is verified through simulations. Depending on the network voltages obtained by the OLTC agent, different operations are executed to prevent voltage limit violations and to minimize the voltage deviations and reductions in the DG power outputs.

Improving photovoltaic parameters of all-polymer solar cells through integrating two polymeric donors

The incorporation of an additional component into the bulk-heterojunction light-harvesting layer of polymer solar cells has been considered as an effective strategy to enhance photovoltaic performance.Here we demonstrated that the photovoltaic parameters of all-polymer solar cells could be enhanced upon replacing a certain ratio of electron-donating polymer PTz BI-o F with a widely used wide-bandgap polymer donor PM6.The photoluminescent characterizations confirmed the F?rster resonance energy transfer from incorporated PM6 to PTz BI-o F.Moreover,the combination of Fourier-transform photocurrent spectroscopy and electroluminescence external quantum efficiencies measurements demonstrated reduced non-radiative recombination energy loss upon the incorporation of PM6,resulting in a slightly enhanced open-circuit voltage of 0.88 V of the ternary cell regarding the binary PTz BI-o F:PFA1 device.The optimized ternary blend devices comprising of PTz BI-o F:PM6:PFA1 presented an impressively high power conversion efficiency of 16.3%,and the efficiency remains 15%on a device with an enlarged effective area of 1 cm^(2),demonstrating the great potential of these all-PSCs for potential applications.

Eight-Year Medical Education Program:Retrospect and Prospect of the High-Level Medical Talent Training in China

Purpose:The 8-year medical education program(EYMEP)is China's path to training high-level medical talents.In retrospect,this study systematically reviewed the developmental process of China's EYMEP.The status quo and characteristics,and threats and challenges,were analyzed,along with the program’s prospects.Design/Approach/Methods:This study analyzed relevant textual materials and policy documents dating back to the time of hosting of China's EYMEP,as well as conducted various specific interviews and field trips.Findings:The exploration of China's high-level medical talent training has been conducted over a century.EYMEP can be divided into five periods:the Only Host Period,the Duplication Pilot Host Period,the Expansion Period,the Joint Exploration Period,and the In-Depth Promotion Period.Currently,there are 14 universities and institutes hosting the EYMEP approved by the Ministry of Education of the People's Republic of China.However,they differ greatly in training ideas and goals,enrollment processes,and training phases.China's EYMEP is faced with some external threats and internal challenges.In the future,China's EYMEP should consider five aspects.Originality/Value:In the new era of the reform and development of China's medical education,a systematic review of the development of EYMEP in China is of great significance to the promotion of high-level medical talent training in China.Meanwhile,the exploration course of China's highlevel medical talent training represented by the EYMEP may be an enlightenment for other countries,especially developing countries like China,in their training of high-level medical talents.

Frequency Analyses for Mechanism Research of Unsteady Flow Inside Three Dimensional Compressor Cascade

Numerical simulations are carried out for unsteady flow field of certain kind of 3D compressor cascade. Emphasis is laid on vortex shedding and frequency analysis in a compressor cascade. Numerical simulations using unsteady Reynolds-averaged viscous turbulent equations are carried out. The results show that the flows in separated areas and wake areas are characterized as periodic or quasi-periodic vortex shedding and the frequencies of vortex shedding vary with incidences and Mach number. At the same Mach number, the frequency of vortex shedding will decrease as the incidence increases. Yet, the frequency will increase as the Mach number increases at the same incidence. In the same computation case, the frequency of vortex shedding will vary along the span of blade. The frequency is smaller at the middle of the span than that at the hub.

Recent advance in polymer solar cells: enhancing power conversion efficiency over 10% with deterministic aperiodic nanostructures

Polymer solar cell(PSC)is a promising photovoltaic technology for clean and renewable energy sources owing to its mechanical flexibility and large-area,low-cost manufacturing compatibility.Significant progress in device performance has been made in the recent years through the development of new materials,morphology control in photo-active layer,interface engineering in multi-layer device,