Material allocation in the face of sudden disasters is an important part of the transportation dispatching system. In order to better solve the rescue problem at the disaster site, an integrated solution for emergency material center location-dispatching and distribution is established. In this paper, the immune optimization algorithm is used in the logistics distribution center location problem. Considering the constraints and optimization objectives of this problem, mathematical models of logistics distribution center location and multi-objective material scheduling problems are established. Comprehensively considering the distance cost and transportation cost in the transportation process, a cost assessment model is established, and an immune optimization algorithm is used to obtain the optimal location plan for emergency materials centers. According to the location results and the total value of transportation, the coding method is improved based on genetic algorithms combined with multi-objective-multi-objective scheduling problems, and a multi-layered genetic algorithm is used to develop a globally optimal material center-demand point material scheduling and distribution plan. Combined with the epidemic situation of new coronavirus in Hubei Province, based on the fusion of the two methods, a set of reasonable and efficient emergency material center location-scheduling scheme are realized, which demonstrate the rationality and efficiency of the method. This result may have significant effects on emergency materials disposal in disaster scenarios.

Chaos oscillator emerges in the fractional-order permanent magnet synchronous motor (PMSM) with some specific operation status and parameters, which will seriously destroy the stable operation of the electric drive system. According to the stability theory of fractional-order system and the characteristics of PMSM, a chaos synchronization controller based on generalized synchronization method is designed and chaotic synchronization of fractional-order PMSM is achieved. Numerical simulation results prove the correctness and effectiveness of the proposed control method, which is flexible and has a wide range of applications.

In the detection of metal surface defects with rough textures, the online machine vision inspection system encounters the problems of error detection, missing detection. In addition, photometric solids have problems such as distortion and warpage of reconstructed curved surfaces when reconstructing the three-dimensional topography of metal surfaces. To address these problems, a metal surface defect detection method based on photometric solid and series expansion is proposed. Firstly, this method uses the photometric stereo principle to reconstruct the metal surface in three dimensions. Secondly, uses the series expansion method to fit the reconstructed surface. Then, the fitted surface is converted into point cloud data. Finally, the point cloud data is processed to complete defect detection.Experimental results show that this method solves the problem of distortion and warpage of reconstructed surfaces, and at the same time, improves the ability to detect defects on metal surfaces. Compared with the method without surface fitting, the defect detection rate of this method has increased by more than 4 percentage points.

Aiming at the problem that the anti-interference ability of the traditional deep learning method and the popular target detection model for the passion fruit detection in real orchards are not ideal, this paper proposes a real-time detection of passion fruit in real orchards based on the improved YOLO-V3 network. Firstly, the prediction scale of large objects in the YOLO-V3 model is eliminated, and the 3-scale prediction is reduced to 2-scale prediction to speed up the detection time. Secondly, the DenseNet network is added to the medium object prediction scale to enhance the propagation of network features for improving the detection accuracy of the model. Finally, the improved YOLO-V3 network is used to train the passion fruit dataset several times to obtain the optimal pre-training model.The experimental results show that the improved YOLO-V3 network has a good real-time detection effect.The average detection accuracy of the target is more than 97.5% and the detection speed is 38 frames/s. The new method provides an effective theoretical basis for real-time detection of passion fruit.

The three-dimensional spatial structure of protein determine its biological function. Structural similarity between proteins can be a good predictor of functional correlations. In this paper, the C_α atomic distance matrix of protein is decomposed into many small sub-matrices that represent the local structure of the protein. Through the statistical analysis of these local structures, a local feature frequency vector is obtained to calculate the similarity of the protein. Consequently, a new method to measure the similarity of protein structure by adaptive local feature frequency vector (ALFF) is proposed. In the way of selecting the local features of protein in ALFF, OTSU is adopted to determine the most appropriate size of the local features m, and MeanShift is applied to find the representative number of local features k, respectively. Experimental results demonstrate that ALFF can achieve better and faster division of the local substructures of proteins. In addition, compared with the method of manual selection of parameters, ALFF has higher consistency in protein structure classification and better accuracy in TM-score comparison.

By introducing the covering Gorenstein AC-flat dimension of modules, the conditions that Gorenstein AC-flat modules are closed under extension are discussed, and a sufficient condition for the stability of Gorenstein AC-flat modules is given. Some properties of Gorenstein AC-flat modules, and some stability conditions of Gorenstein AC-flat modules are improved.

The existence of solutions for a class of anti-periodic boundary value problem of nonlinear fractional differential equations with p-Laplace operator is investigated.Firstly, the Green function of the fractional boundary value problem is given. Then, by using the properties of p-Laplace operator and some fixed point theorems,some results on the existence of solutions are obtained. Finally, two examples are given to confirm the results.

Nonlocal Kirchhoff type problem with linear exponent on Neumann’s boundary condition are considered in this paper. Infinitely many classical solutions {u_n}^∞_n=1 are obtained by using constructors of special functions and partial discussion, where u_n→0 as n→+∞. In terms of variation methods, for those solutions, the energies of corresponding functional are converged to a nonzero constant. Moreover the energies of corresponding functional are converged to zero for the solutions near resonances in this problem. All results mentioned above are suitable for Dirichlet’s boundary condition.

In this paper, an SIRS heroin model with graded cure and incomplete recovery rates is studied. Firstly, the limit set of the system is used to reduce a three-dimensional system to two-dimension system,and equilibrium topological types of the system are verified by analyzing the eigenvalues in detail. Then, it is shown that the system undergoes forward bifurcation with the change of bifurcation parameters. Finally, the phase diagram and state variable curve of the system under different bifurcation parameters are obtained through numerical simulations with the help of ODE45 software package in Matlab, which intuitively show the correctness of the conclusion.

The chemical constituents of ethyl ecetate fraction of Blumea riparia (Bl.) DC. were isolated and purified by repeated silica gel column chromatography and recrystallization methods, and 11 compounds were obtained. These structures were identified by physicochemical properties and spectral analyses as friedelin (1), friedelino (2), β-sitosterol (3), 5-hydroxy-7, 3′, 4′-trimethoxyflavone (4), quercetin (5), luteolin (6), dibutyl phthalate (7), protocatechuicaldehyde (8), porotcateehuie acid (9), caffenic acid (10), salieylic acid (11). Compounds 1,2,4 and 7 were obtained from this plant for the first time.

This paper used carbon diamine EDC as the activator of the carboxyl carrier LX-1000IDA, and the marine lipase was fixed on the carboxyl carrier through the surface amino resin of lipase to generate the fixed marine lipase IDA-LIPASE. To achieve the best immobilization effect, conditions such as the order of addition of carriers, enzymes and crosslinking agents, buffer concentration, temperature, pH, carrier quantity, time and EDC concentration were optimized and screened. After using single-factor experiment, Plackett Burman experiment, and orthogonal experiment, the optimized conditions of immobilization were determined as follows: pH 4.5, carrier amount 0.2 g, time 6h, temperature 25 ℃, 0.6% EDC, The immobilized enzyme was prepared with enzyme activity of 114 U/g. After 10 times of expanded immobilization, the activity of the immobilized IDA- LIPASE reached 210 U/g. After comparing the prepared immobilized lipase with free enzyme, it was found that: the optimal reaction temperature increased by 10 ℃, the optimal reaction pH shifted 0.5 to the alkaline direction, and the reusability was better. About 40% of the enzyme activity was still left after the 7th usage of immobilized catalysis, the immobilize lipase exhibited excellent thermal stability. In addition, the immobilized lipase remained 84.6% enzyme activity after preservation at 4 ℃ for 30 d and exhibited good storage stability. Compared with free enzyme, the immobilized enzyme IDA-LIPASE was more suitable for industrial production environment and possessed the potential and value of practical production.

In order to study pollution characteristics of volatile organic compounds (VOCs) and their health risk assessment on humans in karst groundwater located in Linzi distinct, Zibo city, Shandong province, 19 groundwater samples were collected, 54 VOCs were analyzed. Detection rate, spatial distribution characteristics and influencing factors of VOCs in karst groundwater were analyzed by using mathematical statistics method and graphical method based on the GIS platform and SPSS software. Not cancer risk (NCR) and Incremental lifetime cancer risk (ILCR) of VOCs of drinking the karst groundwater were calculated by the model recommended by United States Environmental Protection Agency (US EPA). VOCs could be detected in 16 sample sites in the study areas, there were 20 VOCs existing the groundwater samples. The highest detection rate of a VOC was 68.42%. Trichloromethane had the highest concentration of 404.00 μg/L. Concentrations of 1,1-dichloroethane, trichloromethane, carbon tetrachloride, trichloroethylene in the D-8 site and trichloroethylene in the D-6 were higher than drinking water criterion of China or WHO. Spatial distribution of VOCs in groundwater had close correlation with chemical factories, groundwater flow field, landuse, human activities and others. The results showed that the maximum cancerous risk indexes along the two groundwater flow paths exceed the US EPA’s recommended risk index (10^-6), the maximum cancerous risk index and noncancerous risks index exceeded the 10^-4 and 1 (US EPA’s accepted standard) in the centralized chemical factories along the one groundwater flow path . Therefore, more attention should be paid to optimize groundwater environment and prevent further deterioration of groundwater quality, in order to ensure the safely drinking water sources and sustainable development of karst groundwater in Linzi distinct, Zibo city, Shandong province.

The relationship between tourists and monkeys was increasingly closed. To investigate the behavioral responses of the rhesus macaques (Macaca mulatta) to tourists in the Qixing Park, Guilin, all-occurrence sampling is used to collect data on macaque-human interactions in August, 2018. Results indicated that the interactions between the rhesus macaques and tourists differed in macaques’ sex/age groups, showing that the interaction initiated by adult males (42.3%±11.6%) was the most common, followed by the immature individuals (30.7%±7.4%), the adult females (16.8%±5.7%), and the adult females with infants (10.1%±3.6%). Moreover, the most frequently occurred interaction of macaques was the Friendly behavior (AGⅣ) (66.2%±8.5%), followed by the Antagonistic behaviors (AGⅡ) (20.2%±3.4%), the Affiliated behaviors (AGⅢ) (9.1%±1.8%), and the Aggressive behaviors (AGⅠ) (4.6%±1.3%). The interactions between tourists and the macaques varied in accordance with tourists’ sex/age. Adult men (30.6%±8.5%) were recorded with the highest proportions in the macaque-human interactions, followed by the underage men (19.7%±4.8%), the underage women (18.5%±5.0%), the adult women (18.3%±6.7%), the elder men (7.9%±2.0%), and the elder women (5.1%±1.4%). The interactions initiated by the tourists included offering foods (51.4%±21.0%), photographing (26.1%±8.7%), adjacent behaviors (11.2%±2.9%), approaching (7.8%±1.7%), shouting (2.2%±0.6%), and clapping (1.4%±0.3%). The current study suggested thatappropriate intervention should be focusedon the management of the adult male macaques in the Qixing Park of Guilin, especially in the peak period. Tourists should follow the rules and reduce offering foods to the macaques. Manageral staff should pay special attention to the behavior of the adult males. Meanwhile, it is essential to enhance safety awareness of tourists to sustain development of animal resource tourism.

In order to reveal the changes of the phylogenetic structure of forest communities in the Qinghai-Tibet Plateau on the elevation gradient and its driving factors. This study took the Tibetan Sejila Mountain forest community as the research subjects, adopted the phylogenetic diversity Faith’s PD index and the phylogenetic β diversity PhyloSor index to analyze phylogenetic diversity of typical forest communities in Tibet, and used the net relatedness index and the nearest taxon index to explore the phylogenetic structure of forest communities with different vegetation types and the variation along the elevation gradient. The results show that the phylogenetic structure (NRI and NTI) of the arbor community accumulates at low altitudes and high altitudes, and the discrete structures are presented in the mid-altitude regions. At all spatial scales, the phylogenetic turnover appears to be non-random, and the environmental distance is significantly higher than the spatial distance for the phylogenetic α and β diversity. The results reveal that environmental filtration plays a leading role in the construction of forest communities and the maintenance of biodiversity in Sejila Mountain, Tibet. There is a significant change in the phylogenetic structure of the community along the elevation gradient. Different community phylogenetic structural indices respond differently to spatial and environmental factor variables. At the same time, it also confirms the crucial role of the non-random process in the process of ecological community construction from the unique geographical unit of the Qinghai-Tibet Plateau.

To provide the scientific management basis for multi-objective sustainable development of Pinus massoniana plantations, the understory woody species composition and diversity in P. massoniana plantations at four different forest ageser were compared and analyzed, i.e., young forest, middle-aged forest, mature forest and overripe forest, in south subtropical area in Guangxi. The results showed that 130 understory woody species were recorded in the four different aged plantations of P. massoniana. The species richness of understory woody plants in P. massoniana plantations increased gradually from young forest to mature forest, but decreased gradually in overripe forest. With the growth of forest age, the Shannon-Winner index of understory woody community showed a trend of increasing first and then decreasing, the Pieolou evenness index and Simpson index showed a trend of decreasing, increasing and decreasing. The similarity of species composition among understory communities of P. massoniana plantations in adjacent age classes was higher, and the rate of species replacement among undergrowth communities of P. massoniana plantations in non-adjacent age classes was higher.

Eco-garden city is the best city form for people to get along with nature harmoniously, so the construction of eco-garden city plays an important role in the optimization of urban green landscape pattern. Taking the Quick Bird satellite image data as main information source, using remote sensing and GIS, selecting the index such as the average patch area, patch density, Shannon diversity index, Shannon evenness index, minimum distance index and corridor density, the dynamic changes of green space landscape pattern in central city of Xuzhou from 2004 to 2014 driven by the construction of eco-garden city were analyzed. The results showed that the average patch area of urban green space increased from 0.17 hm² to 0.40 hm², the patch density decreased from 5.97/hm² to 2.45/hm², the corridor density increased from 1.12 km/km² to 2.32 km/km² and the minimum distance index of public park increased singnificantly, which demonstrated that pattern ofthe green space landscape was constantly optimizing while the numberof the green space landscape was increasing in the central city of Xuzhou, for example, the average area of green patches increased, landscape connectivity was significantly improved, function of protective green space was enhanced and the public parks was well-distributed, which played an important role in protecting biodiversity, stabilizing of urban ecosystem and facilitating public access to parks.