68 results about "Population dynamics" patented technology

The invention discloses a real-time city emergency evacuation simulating method based on mobile phone data. The method comprises the steps: 1) obtaining geographic information system (GIS) map information by using a GIS map information sub-system; 2) calculating personnel real-time distribution information by using a personnel real-time distribution mining sub-system through the mobile phone data and the information obtained by the GIS map information sub-system; 3) after determining the disaster type, class and affected geographic position, using an affected area judgment sub-system to mark an evacuation site as the evacuation terminal point of all persons; 4) according to the obtained GIS map information, personnel real-time distribution information and disaster area judgment information, calculating a personnel evacuation route and an evacuation scheme of all persons by using an evacuation simulation sub-system. The population dynamic distribution point is obtained by a mobile phone communication data mining method. The method is combined with the city evacuation simulation for obtaining the population situation of whole city before the evacuation. The scientificity and accuracy of the city evacuation simulation are ensured, and the effective basis is provided for the following evacuation scheme.

The invention relates to a safety evaluation method of transgene insect-resistant rice on predative natural enemy cyrtorhinus lividipennis. The safety evaluation method includes the five parts including Tier-1 toxicity testing, three-level nutrition testing, protein transferring rules, predation function reaction and population density and population dynamic comparison. The potential toxicity of Bt protein expressed by Bt transgene insect-resistant rice on the cyrtorhinus lividipennis are respectively evaluated by the five parts; influences of the Bt transgene insect-resistant rice on the cyrtorhinus lividipennis on prey media are evaluated; paths and degrees for the cyrtorhinus lividipennis to be exposed in Bt protein are evaluated; influences of the Bt transgene insect-resistant rice on the cyrtorhinus lividipennis population are evaluated. Finally generated ecological effects of transgenic crop planting on non-target organisms are comprehensively evaluated according to data in the five parts. The safety evaluation method is systematic and scientific, and is of great significance on perfecting influence studying of transgenic crops on the non-target organisms and determining the ecological safety of transgenic crop planting.

The invention discloses an attractant for luring and gathering dichocrocis punctiferalis and a bait, and belongs to the field of preparation of the attractant for dichocrocis punctiferalis. The attractant is prepared from compounds including alpha-pinene, camphene, sabinene and beta-pinene in a mixing mode, all the compounds are volatile active compounds released by a main host plant (Chinese chestnut) of dichocrocis punctiferalis in the fields. The attractant is prepared from the volatile active compounds with a function of luring dichocrocis punctiferalis in the mixing mode, can lure and gather a lot of dichocrocis punctiferalis female moths and a small number of male moths, can be applied to monitoring and prevention of the population dynamics of dichocrocis punctiferalis in chestnut orchards, is economical and effective and free from environmental pollution.

The invention relates to the field of pest control and particularly relates to an automatic monitoring device for locusta migratoria manilensis nymphs and a monitoring method thereof. The device comprises a luring module, a trapping module and a processing module, wherein the luring module is used for luring the locusta migratoria manilensis nymphs; the trapping module is used for collecting the locusta migratoria manilensis nymphs; and the processing module is connected with the luring module and comprises a sensor unit, a counting unit and a transmission unit, wherein the sensor unit is used for sensing the locusta migratoria manilensis nymphs, the counting unit is used for counting the quantity of the locusta migratoria manilensis nymphs, and the transmission unit is used for transmitting data to a data management center. According to the automatic monitoring device provided by the invention, the population quantity of the locusta migratoria manilensis nymphs can be automatically monitored; by adopting a photoelectric technology, computer technology and remote transmission technology combined design, the locust nymphs entering traps can be automatically counted, and data are transmitted to the data management center, so that the function of automatically monitoring the population dynamics of locusta migratoria manilensis is achieved; and the device has the characteristics of high efficiency, high sensitivity and high specificity.

The invention relates to a method for identifying Frankliniella occidentalis species by utilizing PCR (Polymerase Chain Reaction)-RFLP (Restriction Fragment Length Polymorphism) technology, comprising the following steps: (1) extracting Frankliniella occidentalis genome DNA; (2) conducting PCR amplification to the mitochondrion COI gene of the Frankliniella occidentalis genome DNA by taking the Frankliniella occidentalis genome DNA as a template; (3) conducting enzyme cutting to the PCR product prepared in step (2) by adopting restriction enzyme EarI to obtain an enzyme cutting product; and (4) conducting agar gel electrophoresis analysis on the enzyme cutting production prepared in step (3). The restriction enzyme is the common restriction enzyme, therefore, the method provides a simple, convenient and stable enzyme cutting marker for screening two types of Frankliniella occidentalis, and simultaneously explores and establishes an identification technology for the two types of Frankliniella occidentalis, and lays a foundation for identification on the population dynamics of the two types of Frankliniella occidentalis and research on biology and invasion mechanisms.

The invention discloses an urban personnel regional deployment and control management method based on multi-source big data. The method comprises the following steps: obtaining population dynamic dataof a plurality of regions from the multi-source data; According to the population dynamic data, determining the same target appearing in more than one region and the region appearing in each same target, obtaining a candidate item set taking each region as an item, and determining k-item set of which the support degree is greater than a minimum support degree threshold value from the candidate item set, Wherein k is greater than or equal to 2; Generating a corresponding candidate association rule according to each frequent item set, and determining a credible association rule of which the confidence coefficient is greater than a minimum confidence coefficient threshold from the candidate association rules; And predicting the population state of the corresponding rear item corresponding region according to the population state of the front item corresponding region in a part of or all credible association rules, and adjusting the deployment and control strategy of the management resources according to the prediction result. According to the method, the management resources can be allocated and deployed in advance according to the personnel dynamic characteristics of each region, sothat the waste of the management resources is avoided.

Belonging to the technical field of plant tissue culture, the invention provides a method for introducing nitrogen-fixing bacteria into sugarcane tissue culture seedlings. The method consists of: under aseptic operation conditions, cutting the stem tips of sugarcane, and conducting callus induction, seedling differentiation culture, rooting induction as well as strong seedling culture in order; making use of a labeled strain of Klebsiella to prepare a bacterial suspension, and carrying out bacterium inoculation treatment on sugarcane tissue culture seedlings; determining the colonization dynamics of the labeled strain of Klebsiella in the sugarcane tissue culture seedlings; and detecting colonization of the labeled strain of Klebsiella in sugarcane tissues by a fluorescence microscope. The method for introducing nitrogen-fixing bacteria into the sugarcane tissue culture seedlings adopts the fluorescence microscope to observe infection and colonization of the Klebsiella labeled strain, investigates the population dynamics of the Klebsiella labeled strain by an antibiotic resistance labeling method and a plate isolating counting method, and provides references for popularization and application of health seedlings with nitrogen-fixing bacteria and for the interaction study of nitrogen-fixing bacteria and sugarcane, thus having high promotion and the application value.

The invention discloses a biomass population dynamics predictive parsing worldwide general key factor presupposing array platform. Mass of standard environment factor arrays are preset, the world population dynamic prediction users select content fit for own country or local areas to construct an accurate specified area and specific biological population dynamics statistical prediction model through an Internet user registration system in real time, accurate quantitative forecast is conducted on related biological future trends conveniently, each preset datum is positioned by row variable coordinates and column variable coordinates, each positioned independent datum cannot transpose with one another, the row variable coordinates serve as time coordinates, and the column variable coordinates serve as space coordinates. The problems that in current life population prediction an effective prediction models of a plurality of important biological population cannot be constructed, or the prediction effect of the constructed models is poor, or the application range is narrow due to the fact that users cannot obtain enough effective environment information quantity are solved.

The invention discloses a method for efficiently trapping Monochamus alternatus and a special device for the method. According to the method, traps are installed in a Monochamus alternatus region, and the Monochamus alternatusis trapped by 495-500nm of light waves emitted from the traps. According to the method for efficiently trapping the Monochamus alternatus and the special device for the method, disclosed by the invention, the Monochamus alternatus is trapped by adopting monochromatic LED (light-emitting diode) illuminators, so the trapping efficiency is high; the method has a very good trapping effect on the Monochamus alternatus in a diet supplement period and a spawning period, not only is capable of reducing the population number of the Monochamus alternatus and monitoring the population dynamics of the Monochamus alternatus but also is suitable for preventing the propagation of Bursaphelenchus xylophilus to reduce the hazard of the Bursaphelenchus xylophilus.

The embodiment of the invention provides a regional population prediction method and system based on a spatial attraction index, and the method comprises the steps: obtaining the spatial characteristic quantity of a current region, and the spatial characteristic quantity comprising a spatial environment characteristic quantity and a spatial region characteristic quantity; utilizing a pre-trained space attraction degree model to input the space characteristic quantity, and determining the attraction degree of the current region to each population type; predicting the migration quantity of the population corresponding to the population type according to the attraction degree, wherein the migration quantity comprises the immigration quantity and the emigration quantity; and configuring resources for the current area according to the migration quantity. According to the regional population prediction method and system based on the spatial attraction index, the dynamic population development trend of the urban area can be accurately predicted, and then a basis is provided for resource allocation of the urban area.

The invention discloses a fast labeling and tracking method of recombinant human adenovirus type 5. An aggregation-induced emission molecule is used as a fluorescence label, and through electrostaticinteraction, human adenovirus type 5 is labeled by the aggregation-induced emission molecule. Through a laser confocal imaging analysis system, a whole infection process of the human adenovirus type 5infecting a host cell can be tracked. The labeling method is simple and efficient, effects on adenovirus activity are small, and population dynamic infection behaviour of the adenovirus in the singlecell can be fully reflected. The multiobjective real-time long-time human adenovirus type 5 tracking method in combination with excellent optical property of the aggregation-induced emission moleculeis built, and a powerful tool is provided for globally and efficiently studying a human adenovirus type 5 infection mechanism.