Image Recognition of Male Oilseed Rape (Brassica napus) Plants Based on Convolutional Neural Network for UAAS Navigation Applications on Supplementary Pollination and Aerial Spraying

To ensure the hybrid oilseed rape (OSR, Brassica napus) seed production, two important things are necessary, the stamen sterility on the female OSR plants and the effective pollen spread onto the pistil from the OSR male plants to the OSR female plants. The unmanned agricultural aerial system (UAAS) has developed rapidly in China. It has been used on supplementary pollination and aerial spraying during the hybrid OSR seed production. This study developed a new method to rapidly recognize the male OSR plants and extract the row center line for supporting the UAAS navigation. A male OSR plant recognition model was constructed based on the convolutional neural network (CNN). The sequence images of male OSR plants were extracted, the feature regions and points were obtained from the images through morphological and boundary process methods and horizontal segmentation, respectively. The male OSR plant image recognition accuracies of different CNN structures and segmentation sizes were discussed. The male OSR plant row center lines were fitted using the least-squares method (LSM) and Hough transform. The results showed that the segmentation algorithm could segment the male OSR plants from the complex background. The highest average recognition accuracy was 93.54%, and the minimum loss function value was 0.2059 with three convolutional layers, one fully connected layer, and a segmentation size of 40 pix × 40 pix. The LSM is better for center line fitting. The average recognition model accuracies of original input images were 98% and 94%, and the average root mean square errors (RMSE) of angle were 3.22° and 1.36° under cloudy day and sunny day lighting conditions, respectively. The results demonstrate the potential of using digital imaging technology to recognize the male OSR plant row for UAAS visual navigation on the applications of hybrid OSR supplementary pollination and aerial spraying, which would be a meaningful supplement in precision agriculture.

Overlapping Perspectives

<p>All urban sites around the world have their own unique, evolving historical identity. However, this identity can often become obscured, or even lost, over time due to the progressive changes that occur to the transforming urban context. An urban site's evolution may include newly reclaimed land, conflicting grid alignments as new roads are added, new buildings being constructed that fail to reaffirm site identity in relation to existing conditions and historic buildings that become re-purposed with a subsequent loss of their original architectural identity. The site selected for this design research investigation is Queens Wharf in Wellington. Located in the heart of New Zealand's capital city, where land meets sea at the center line of the city's skyline, Queens Wharf occupies one of the most important sites in the capital. However, the principal problem of this site is its lack of coherent place identity. This problem has arisen in relation to five main factors: 1) very large, anonymous new metal shed buildings have been added in poor relationships with historic masonry and timber ones; 2)heritage buildings have been re-purposed, and their interior programmes are no longer represented by their architectural facades; 3) enormous, contemporary, and very unattractive buildings such as the TSB Arena house programmes that change throughout the year, preventing the exterior architecture from providing identity to what is happening within; 4) a confluence of conflicting grids has developed over time at this site; and 5) Queens Wharf's important location at the edge of city and sea near the center line of the city's skyline provides a significant opportunity for this site to act as a visual gateway to the capital city, but this opportunity remains unfulfilled. The thesis proposes that architecture can play an essential role in establishing place identity for Queens Wharf by: 1) implicating historic architectural features into new architectural interventions – so that the historic buildings are fundamentally important to understanding the new and vice versa – by integrating the new and the old in ways that present all the stages of the site’s evolution as important chapters in its overall tale; 2) exposing interior programmes to the outside to establish architectural identity through programmatic visibility; 3) establishing new architectural interventions as 'pivots' to help make sense of conflicting grid alignments; 4) arranging architectural interventions as a framing device and an important liminal threshold between the opposing conditions of land and sea.</p>

Overlapping Perspectives

<p>All urban sites around the world have their own unique, evolving historical identity. However, this identity can often become obscured, or even lost, over time due to the progressive changes that occur to the transforming urban context. An urban site's evolution may include newly reclaimed land, conflicting grid alignments as new roads are added, new buildings being constructed that fail to reaffirm site identity in relation to existing conditions and historic buildings that become re-purposed with a subsequent loss of their original architectural identity. The site selected for this design research investigation is Queens Wharf in Wellington. Located in the heart of New Zealand's capital city, where land meets sea at the center line of the city's skyline, Queens Wharf occupies one of the most important sites in the capital. However, the principal problem of this site is its lack of coherent place identity. This problem has arisen in relation to five main factors: 1) very large, anonymous new metal shed buildings have been added in poor relationships with historic masonry and timber ones; 2)heritage buildings have been re-purposed, and their interior programmes are no longer represented by their architectural facades; 3) enormous, contemporary, and very unattractive buildings such as the TSB Arena house programmes that change throughout the year, preventing the exterior architecture from providing identity to what is happening within; 4) a confluence of conflicting grids has developed over time at this site; and 5) Queens Wharf's important location at the edge of city and sea near the center line of the city's skyline provides a significant opportunity for this site to act as a visual gateway to the capital city, but this opportunity remains unfulfilled. The thesis proposes that architecture can play an essential role in establishing place identity for Queens Wharf by: 1) implicating historic architectural features into new architectural interventions – so that the historic buildings are fundamentally important to understanding the new and vice versa – by integrating the new and the old in ways that present all the stages of the site’s evolution as important chapters in its overall tale; 2) exposing interior programmes to the outside to establish architectural identity through programmatic visibility; 3) establishing new architectural interventions as 'pivots' to help make sense of conflicting grid alignments; 4) arranging architectural interventions as a framing device and an important liminal threshold between the opposing conditions of land and sea.</p>

Experimental Quantification of the Lateral Mixing of Binary Solids in Bubbling Fluidized Beds

A novel experimental method for the lateral mixing of binary solids in bubbling fluidized beds was developed based on the capacitance probe technique. The evolutions of local mixing ratios in a fluidized bed which can be assumed as one mixing cell were analyzed in detail. The solids mixing within one mixing cell was resolved and the effect of convection and diffusion mechanism on lateral mixing was evaluated individually. The results show that at lower part of the fluidized bed, convection plays a more important role in the mixing process near the wall; meanwhile, diffusion is very important for the mixing around the center line. This is opposite with that at the higher part. A lateral micro dispersion coefficient was proposed to characterize the lateral mixing within the mixing cell and the value is generally between 0.005 and 0.025 m/s. A new mixing index was proposed to evaluate the lateral mixing quality of binary solids. It was found that at the lower part of the fluidized bed, the best mixing is acquired at the half radius, whereas mixing at the center line is the worst. At the higher part, solid mixing is better when increasing the distance from the wall. The influences of gas velocity and static bed on the lateral mixing were also discussed from a microscopic perspective.

Research on the fit raglan sleeve based on the armhole depth and the connection point between body and sleeve

PurposeBy controlling the value of influencing factors of raglan sleeves, the authors can balance the comfort and aesthetics of raglan sleeves and get the best parameter value.Design/methodology/approachUnder the condition that the slope of sleeve midline is 45 and the height of sleeve mountain is 15.00 cm, different armhole depth and connection point between the body and the sleeve are combined, and the influence of these two on the comfort and aesthetics of clothing is studied by CLO software.FindingsThe relationship between sleeve fat (Y), armhole depth drop (X1) and the distance (X2) between the connection point between the body and the sleeve and the center line is Y = 12.985 + 1.240·X1 + 0.895·X2. When the armhole drop is 5.00 cm and the connection point is 1 cm closer to the center line, the comfort and aesthetics can be better balanced.Originality/valueThese data can provide reference for future research on raglan sleeves.

High Speed Roll Caster for Aluminum Alloy

Two types of high-speed twin-roll casters and a single-roll caster equipped with a scraper were proposed. One of the twin-roll casters is a vertical-type high-speed twin-roll caster, and the other twin-roll caster is an unequal-diameter twin-roll caster. The vertical-type high-speed twin-roll caster can cast strip at speeds of up to 120 m/min. The unequal-diameter twin-roll caster casts strip at speeds up to 60 m/min. The unequal-diameter twin-roll caster is superior to the vertical-type high-speed twin-roll caster at the point of conveyance of the cast strip. A single-roll caster equipped with a scraper can cast strip without center-line segregation at speeds of up to 40 m/min. The use of a copper alloy roll and the non-use of a parting material enable high-speed roll casting. Since the roll loads of these casters are smaller than 0.1 kN/mm, soft copper alloy roll can be used. The strip does not stick to the roll without the parting material because of the use of the copper alloy roll with high thermal conductivity and the small roll load. The cooling rate near the surface is higher than 2000 °C/s.

Squared prime numbers

My investigation shows that there is a regularity even by the prime numbers. This structure is obvious when a prime square is created. The squared prime numbers. 1. Connections in a prime square A prime square (or origin square) is defined as a square consisting of as many boxes as the origin prim squared. This prime settle every side of the square. So, for example, the origin square 17 have got four sides with 17 boxes along every side. The prime numbers in each of the 289 boxes are filled with primes when a prime number occur in the number series (1,2,3,4,5,6,7,8,9 and so on) and then is noted in that very box. If a box is occupied in the origin square A this prime number could be transferred to the corresponding box in a second square B, and thereafter the counting and noting continue in the first square A. Eventually we get two filled prime squares. Analyzing these squares, you leave out the right vertical line, representing only the origin prime number, When a square is filled with primes you subdivide it into four corner squares, as big as possible, denoted a, b, c and d clockwise. You also get a center line between the left and right vertical sides. Irrespective of what kind of constellation you activate this is what you find: Every constellation in the corner square a and/or d added to a corresponding constellation in the corner square b and/or c is evenly divisible with the origin prime. Every constellation in the corner square a and/or b added to a corresponding constellation in the corner square d and/or c is not evenly divisible with the origin prime. Every reflecting constellation inside two of the opposed diagonal corner squares, possibly summarized with any optional reflecting constellation inside the two other diagonal corner squares, is evenly divisible with the origin prime squared. You may even add a reflection inside the center line and get this result. My Conjecture 1 is that this applies to every prime square without end. A formula giving all prime numbers endless In the second prime square the prime numbers are always higher than in the first square if you compare a specific box. There is a mathematic connection between the prime numbers in the first and second square. This connection appears when you square and double the origin prime and thereafter add this number to the prime you investigate. A new higher prime is found after n additions. You start with lowest applicable prime number 3 and its square 3². Double it and you get 18. We add 18 to the six next prime numbers 5, 7, 11, 13, 17 and 19 in any order. After a few adds you get a prime and after another few adds you get another higher one. In this way you continue as long as you want to. The primes are creating themselves. A formula giving all prime numbers is: 5+18×n, +18×n, +18×n … without end 7+18×n, +18×n, +18×n … without end 11+18×n, +18×n, +18×n … without end 13+18×n, +18×n, +18×n … without end 17+18×n, +18×n, +18×n … without end 19+18×n, +18×n, +18×n … without end The letter n in the formula stands for how many 18-adds you must do until the next prime is found. My Conjecture 2 is that this you find every prime number by adding 18 to the primes 5, 7, 11, 13, 17 and 19 one by one endless. A method giving all prime numbers endless There is still a possibility to even more precise all prime numbers. You start a 5-number series derived from the start primes 7, 17, 19, 11, 13 and 5 in that very order. Factorized these number always begin with number 5. When each of these numbers are divided with five the quotient is either a prime number or a composite number containing of two or some more prime numbers in the nearby. By sorting out all the composite quotients you get all the prime numbers endless and in order. Every composite quotient starts with a prime from 5 and up, squared. Thereafter the quotients starting with that prime show up periodically according to a pattern of short and long sequences. The position for each new prime beginning the composite quotient is this prime squared and multiplied with 5. Thereafter the short sequence is this prime multiplied with 10, while the long sequence is this prime multiplied with 20. When all the composite quotients are deleted there are left several 5-numbers which divided with 5 give all prime numbers, and you even see clearly the distance between the prime numbers which for instance explain why the prime twins occur as they do. My Conjecture 3 is that this is an exact method giving all prime numbers endless and in order.

Analysis of Risk-Based Operational Bird Strike Prevention

Bird strike prevention in civil aviation has traditionally focused on the airport perimeter. Since the risk of especially damaging bird strikes outside the airport boundaries is rising, this paper investigates the safety potential of operational bird strike prevention involving pilots and controllers. In such a concept, controllers would be equipped with a bird strike advisory system, allowing them to delay departures which are most vulnerable to the consequences of bird strikes in case of high bird strike risk. An initial study has shown the strong potential of the concept to prevent bird strikes in case of perfect bird movement prediction. This paper takes the research to the next level by taking into account the limited predictability of bird tracks. As such, the collision avoidance algorithm is extended to a bird strike risk algorithm. The risk of bird strikes is calculated for birds expected to cross the extended runway center line and to cause aircraft damage upon impact. By specifically targeting these birds and excluding birds lingering on the runway which are taken care of by the local wildlife control, capacity reductions should be limited, and the implementation remain feasible. The extrapolation of bird tracks is performed by simple linear regression based on the bird positions known at the intended take-off times. To calculate the probability of collision, uncertainties resulting from variability in bird velocity and track are included. The study demonstrates the necessity to limit alerts to potentially damaging strikes with birds crossing the extended runway center line to keep the imposed delays tolerable for airports operating at their capacity limits. It is shown that predicting bird movements based on simple linear regression without considering individual bird behavior is insufficient to achieve a safety-effect. Hence, in-depth studies of multi-year bird data to develop bird behavior models and reliable predictions are recommended for future research. This is expected to facilitate the implementation of a bird strike advisory system satisfying both safety and capacity aspects.