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With the rapid development of automotive electronics and advanced assisted driving technology, autonomous driving as an advanced stage of assisted driving technology has become an important way to solve traffic travel in the future, and has become a new hot spot and focus of technology research worldwide. Especially in recent years, autonomous driving has made a milestone in the history of human transportation. This paper briefly describes the development of autonomous driving and the related content of key technologies. On this basis, it reviews the research level of environmental awareness through automatic driving and the use of cutting-edge artificial intelligence technology in automatic driving, involving relevant statements on key technologies such as environmental intelligent sensing，sensors integration, advanced planning, and control. And finally it summarizes the current problems of the automatic driving system, and looks forward to the future development direction of autonomous driving technology.

AODV routing protocol takes the minimum hop as the only basis in route selection，causing the uneven allocation of resources and reduction in network lifetime.A routing algorithm based on minimum hops and energy of node（AODV-HE）was proposed.By integrating both minimum hop and residual energy of each node，the algorithm optimized the routing mechanism and presented a selection weight of reverse routing，based on which the best route was chosen.Simulation results show that the algorithm can effectively increase packet delivery ratio and reduce the end-end delay，and it can also improve the allocation of network resources and extend network lifetime.

Clostridium butyricum is a good probiotic additive, which can effectively improve the growth performance of piglets, improve the diarrhea of piglets, improve the antioxidant capacity and immune function of piglets, and reduce the mortality of piglets. Clostridium butyricum can produce short-chain fatty acids mainly butyric acid, cooperate with other probiotics to regulate the digestive environment, improve the intestinal microstructure, and help maintain the microecological balance, thus improving the digestion and absorption capacity of piglets. With the gradual application of Clostridium butyricum in piglet feeding, it is necessary to further study the specific mechanism of Clostridium butyricum's probiotic effect on piglets. This paper reviewed the biological function of Clostridium butyricum and its probiotic effect on piglets and its mechanism, which provided a reference for improving the feeding effect of Clostridium butyricum on piglets. [ABSTRACT FROM AUTHOR]

Shanyou You No. 1, a new peanut variety with super high yield was bred by EMS (ethylmethane sulfonate) mutagenesis with the dried seeds of Shanyou 212 as the materials by Shantou Institute of Agricultural Science. It passed the national peanut variety identification and Guangdong crop variety approval in 2014, with the identification number of Guopingjian Peanut 2014014 and the approval number of Yueshenyou 2014001. It obtained the new plant variety right in 2017, with the variety right number of CNA20140907.4. In 2018, it passed the national non-major crop variety registration with the registration number of GPD Peanut (2018) 440280. The yield of this variety was outstanding. In the national (southern district) regional test of peanut varieties and the regional test of the new peanut varieties being planted in spring in Guangdong Province, the dry pod yields was 4 590.08 kg/hm² and 4 112.85kg/hm², respectively, which were 11.20% and 15.25% higher than that of the control Shanyou 523. It had the oil content of 49.31%-53.45% and protein content of 21.40%-26.58%. It was highly resistant to the rust and leaf spot diseases, and susceptible to bacterial wilt, with strong lodging resistance, drought resistance, and waterlogging resistance. The variety is suitable to be planted in spring and autumn in the water-drought rotation plough land and dry sloping fields in Guangdong, as well as in spring in the peanut production areas in western Guangxi, Fujian, Yunnan, southern Jiangxi, and southern Hunan. During the cultivation, the attention should be paid to the selection of soil property, timely sowing, reasonable close planting, strengthening the fertilizer and water management, and timely prevent and control of weeds, diseases, insect pests and rodent harm. [ABSTRACT FROM AUTHOR]

Left ventricular assist devices (LVAD) implantation is an effective treatment for end - stage heart failure in addition to heart transplantation. Neurological complications, especially ischemic stroke and hemorrhagic stroke, are the most common complications in patients after LVAD. This paper reviews the common neurological complications and its risk factors in patients after LVAD, and proposes early prevention and management strategies to provide guidance for the perioperative and long - term management of LVAD implantation in end-stage heart failure. [ABSTRACT FROM AUTHOR]

In order to study the seismic behavior of tenon-mortise joints with different pin types, as well as the influence of three parameters such as tenon height, tenon thickness, and column diameter on the mechanical properties of tenon-mortise joints, in this study, finite element software modeling was used for the quasi-static analysis of tenon-mortise joints, and the seismic indexes such as hysteretic curve, skeleton curve,and energy dissipation capacity of three types of specimens were obtained. The results showed that the hysteresis curves of the three types of tenon-mortise joints penetrating pin showed obvious Z-shape, and the pinch effect was obvious .The bearing capacity of three types of tenon-mortise joints with penetrating pin under repeated load was not significantly different. The tenon height, tenon thickness and column diameter had significant influence on the bearing capacity of tenon-mortise joints. The bearing capacity of joint increased with the increasing of tenon thickness and column diameter, and increased first and then decreased with the increase of tenon height. According to the skeleton curve of tenon-mortise with penetrating pin, a bending moment-turning angle bilinear model of the joint was established, which explored the influence of tenon height, tenon thickness and column diameter on the model parameters. In the design of wood structures, the influence of the size change of tenonmortise on the mechanical properties of joints should be considered comprehensively. [ABSTRACT FROM AUTHOR]

The sense of smell plays an important role in daily activities of mammals. Olfaction is a complex biological process. Volatile odor molecules specifically bind to olfactory receptors (OR) present in olfactory epithelial cells to exert the biological function of olfaction. OR in the air through olfactory receptors and sends signals to the brain about the location of food, potential mates, predators and harmful substances. Detects olfactory substances also found in organs other than the nasal cavity, bind to molecules such as nutrients and metabolites in the animal's internal environment to trigger a physiological response. The article mainly focuses on the structure, distribution, polymorphism, function, related signaling pathways of OR genes and the role of smell in animal feeding, in order to provide reference for studying the role of olfactory in animal feeding. [ABSTRACT FROM AUTHOR]

The study was conducted to investigate the effect of dietary supplemental compound probiotics on growth performance, intestinal barrier and immune function of Clostridium perfringens infected broilers. A total of 240 one-day-old Cobb broilers were randomly divided into four groups, which were control group, infected group, compound probiotics 1 + infected group and compound probiotics 2 + infected group, with five replicates in each group, 12 broilers in each replicate. Compound probiotics 1 mainly consisted of Lactobacillus zeae and Lactobacillus plantarum, and compound probiotics 2 mainly contained Lactobacillus paracasei. All infected broilers were inoculated orally with Clostridium perfringenss type A during 14~20 d, and broilers in uninfected group were inoculated with an equal volume of liquid medium. The experiment lasted for 42 d. The results showed that compared with control group, the average body weight and average daily gain of broilers at 21 d and 1~21 d in infected group were significantly decreased (P<0.05), and the average daily gain and average daily feed intake of broilers at 1~42 d in infected group were significantly decreased (P<0.05). Compared with control group, ileum villi height was significantly decreased (P<0.05), spleen index was significantly increased (P<0.05). Compared with infection group, the ratio of jejunum villus height to crypt depth of broilers in compound probiotic 1 + infected group on 21 d and 28 d was significantly increased (P<0.05), and the spleen index was significantly decreased (P<0.05). The average daily gain of broilers from 1 to 42 d in the compound probiotics 2 + infected group was significantly increased (P<0.05), the ratio of jejunum villus height to crypt depth at 28 d was significantly increased (P<0.05), jejunum ZO-1 mRNA level at 21 d was significantly up-regulated (P<0.05), IL-8 mRNA levels in jejunum of broilers at 21 d was significantly down-regulated (P<0.05). The experiment indicates the addition of Lactobacillus paracasei-based compound probiotics to diet can mitigate the negative impact on production performance of Clostridium perfringens-infected broilers. The addition of Lactobacillus-based compound probiotics can improve the intestinal health of broilers. [ABSTRACT FROM AUTHOR]

Aiming at the complex engineering geological and environmental conditions of the tunnel, many unforeseen safety risk factors, the rigorousness of quality control and environment protection, and the heavy construction organization and coordination tasks, this research uses digitalization technology to achieve safe, high-quality and efficient tunnel construction. Firstly, BIM-based comprehensive early warning for tunnel construction organization progress and BIM-based 3D visualized progress-refined management are studied. Secondly, after studying the safety positioning management of personnel and mechanical equipment based on video analysis and identification and short-distance positioning, advanced prediction of poor geological conditions in tunnel construction, surrounding rock deformation monitoring and measurement, dynamic safety-step monitoring, and hazardous gas monitoring and early warning are achieved by utilizing BIM, Internet of Things, advanced forecasting, monitoring measurement and multiple safety risk identification and monitoring technologies. Thirdly, by studying the integration of BIM, 3D scanning, mobile internet technology and tunnel excavation, digital analysis and warning of over and under cut and flatness of tunnel engineering, automatic analysis and alarm of lining anti-cavitation, and analysis and judgment of engineering entity quality are accomplished. Lastly, combined with the actual engineering applications, the key technologies and their application effects are verified, which provides some reference for the digital information management of tunnel construction. [ABSTRACT FROM AUTHOR]

Panicle nitrogen fertilizer amount and shading during grain filling period directly and obviously regulated the relationship between carbon and nitrogen metabolism of rice grains by affecting leaf photosynthesis and plant nitrogen nutrition, which would be benefit to forming different characteristics of rice quality. In order to investigate the combined effect between panicle nitrogen fertilizer amount and shading during grain filling period on quality of conventional japonica rice, field experiments were carried out with three panicle nitrogen application treatments of 40.5 kg hm-2 (N1), 81.0 kg hm-2 (N2) and 121.5 kg hm-2 (N3) at the same amount of basal and tilling fertilizers, and two artificial shading treatments of 100% natural light (S0) and 50% natural light (S50) during grain filling period in 2019 and 2020. The quality characteristics of conventional japonica rice Huaidao 5, Nanjing 9108, and Yangnongxiang 28 were determined under different light and nitrogen conditions during grain filling period. Results showed that with the increase of panicle nitrogen fertilizer amount, the brown rice rate, milled rice rate, and heading rice rate firstly increased and then decreased under S0 and decreased under S50. The brown rice rate, milled rice rate and heading rice rate of S0 were significantly higher than S50, while the processing quality of S0N2 with higher heading rice rate was the best among all treatments. The chalkiness grain percentage and chalkiness degree of rice had a trend of S50N3 > S50N2 > S50N1 > S0N3 > S0N2 > S0N1. Therefore, the increase of panicle nitrogen fertilizer amount and the shading during grain filling period had a cumulative effect on the increase of chalkiness grain rate and chalkiness degree of rice. Both the increase of panicle nitrogen fertilizer amount and shading during grain filling period decreased the amylose content and gel consistency, but increased the protein content. And the variation coefficient of glutelin was higher than other protein components among treatments. The rice taste value was decreased with the increase of panicle nitrogen fertilizer amount and the shading during grain filling period, while the direct influence of taste characteristic value on taste value was different among rice varieties. The peak viscosity and breakdown viscosity of rice starch decreased with the increase of panicle nitrogen fertilizer amount and the shading during grain filling period, while the setback viscosity increased. And the combination of light and nitrogen increased the difference of the above viscosity indexes among treatments. Based on the ratio of amylose content to protein content under different treatments of panicle nitrogen fertilizer amount and shading during grain filling period, the carbon and nitrogen metabolism ability of plants at grain filling stage were changed. In addition, the amylose content and protein content were significantly negatively correlated with taste value, while the correlation coefficient of protein was bigger than amylose content. Thus, an appropriate reduction of panicle nitrogen application fertilizer amount was beneficial to the improvement of rice processing quality, appearance quality and cooking and eating quality at grain filling stage with shading. The reduction of amylose content and especially the reduction of protein content might be an effective way to improve rice taste. The results would provide scientific support for the innovation of high yield and good taste rice cultivation techniques. [ABSTRACT FROM AUTHOR]

Aiming to solve the construction engineering difficulties that exist in key railway stations of the Beijing-Tianjin-Hebei region, a series of works have been carried out to eliminate the problems of new construction visions, high plan positioning, tight construction tasks, high safety risks, strict quality demands, challenging technical difficulties, and complicated management and organization. BIM engineering standards related to railway station construction have been established and applied after systematically researches and deep integration of the railway-station construction technology with new such technologies as BIM, mobile internet, IoT, cloud computing, and 5G. A collection of railway-station construction-related key technologies have been studied and innovatively put into engineering use, which contain measuring and monitoring the safety and quality of mass concrete, deep base pit, large tower crane, formwork support, and environment protection; intelligent construction of steer-structure buildings; digital processing and intelligent welding of steel bars; assembled construction of sound- absorbing walls, electromechanical devices and pipelines in the station platform; developing the software of the Digitalization Management Platform, the Smart Construction Site Information Management System, the Intelligent Ticket Service System, the Intelligent Railway Station Suite, the Railway Station Structure Monitoring Platform; and Smart Energy Management and Control Systems. These efforts have solved the practical technical problems in railway-station construction digitalization and intelligentization encountered in the stations in Beijing - Tianjin -Hebei Region, such as the Xiong'an Station, the Beijing-Chaoyang Station, and the Qinghe Station. The dynamic monitoring and optimization of construction period, the effective control of safety risks, the improved quality of station construction, the increased efficiency of collaborative organization and management have provided technical support and application demonstration for the building of novel, competitive, intelligent and green railway stations. [ABSTRACT FROM AUTHOR]

o study the dispersion and stability of nano TiO2 particles in water. The water dispersion properties of nano-TiO2 under the synergistic action of pH regulator [ NaOH, ammonia water solution,2-amino-2-methyl-1-propanol (AMP-95) ] and dispersant [ sodium hexametaphosphate (SHMP), sodium polyacry-late (PAAS) ] were studied. Atomic force microscopy (AFM) and Zeta potentiometer were used to characterize the dispersion and stability, respectively. The results show that the combination of NaOH and SHMP has the best dispersion effect on nano-TiO2 when the pH is 10,and the height h measured by AFM is 2.78 nm. The dispersion stability of nano-TiO2 aqueous dispersion system combined with AMP-95 and PAAS is the best,8 = -50. 337 mV. The synergistic effect of pH regulator and dispersant was obvious. [ABSTRACT FROM AUTHOR]

Rice cultivars of Nanjing 9108 with good taste quality was adopted as material under the pure nitrogen condition of 270 kg hm-2 in this study. Rice was cultivated with two methods including mechanical transplanting with pothole seedlings (MT) and mechanical transplanting with carpet seedlings (MC). Controlled-release fertilizer and quick-acting nitrogen fertilizer were mixed at a ratio of 5:5. Controlled-release fertilizer was mixed from four different release periods (40, 80, 100, and 120 days) at a ratio of 1:4 to form three mixing modes (40+80, 40+100, and 40+120). Conventional urea split fertilization (CK) was used as a control, and the effects of different controlled-release fertilizer ratios on yield formation and nitrogen accumulation of high-quality japonica rice were studied. Under the same fertilizer treatment, compared with mechanical transplanting with carpet seedlings (MC), the two-year yield of mechanical transplanting with pothole seedlings (MT) was significantly increased by 3.9% and 4.9%, respectively. The reason was that the transplanting of pothole seedling machine could improve the accumulation of photosynthetic substances in the middle and late stages and obtain larger panicle type with higher grain number per panicle, seed setting rate, and 1000-grain weight. Under the cultivation mode of pothole seedling transplanting and carpet seedling transplanting, compared with CK, the two-year yield of 40+80 and 40+100 controlled-release fertilizer treatments were higher than CK, and the two-year yield of 40+100 controlled-release fertilizer treatments was the highest, which was significantly increased by 7.3% and 9.2%, respectively. The reason was that 40+100 controlled-release fertilizer treatment had higher effective panicle number and population glume amount. Compared with 40+80 and 40+120 controlled-release fertilizer treatments, the nutrient absorption law of 40+100 controlled-release fertilizer treatment was more consistent with Nanjing 9108, which not only ensured the occurrence of early tillering, but also ensured the stable production of photosynthetic substances at later stage, thus obtaining stable panicle number, grains per panicle, and 1000-grain weight. Compared with CK, the nitrogen recovery efficiency, nitrogen agronomic efficiency, nitrogen physiological efficiency, and nitrogen partial productivity of 40+100 controlled-release fertilizer treatments were significantly increased by 10.0%-12.5%, 24.6%-30.5%, 11.4%-18.6%, and 7.3%-9.1%, respectively. In conclusion, the mechanical transplanting with pothole seedlings (MT) had obvious advantages over mechanical transplanting with carpet seedlings (MC), which was a cultivation method that was conducive to high-quality japonica rice. At the same time, the 40+100 controlled-release fertilizer ratio could better meet the nutrient requirements of good-quality japonica rice at various stages, and could obtain high yield, which could be used as a simplified fertilization scheme for high-quality japonica rice. [ABSTRACT FROM AUTHOR]

To explore the characteristics and differences in yield, photosynthetic matter production, quality and economic benefits of rice under different modes of comprehensive planting-breeding in paddy fields, six modes including rice crayfish (RC), rice turtle (RT), rice loach (RL), rice catfish (RF), rice koi (RK), and rice duck (RD) were arranged using Nanjing 9108 (a high-quality rice variety) as the experimental material in 2018 and 2019. Comparing these modes with rice cultivation under rice-wheat rotation (CK), the effects of different modes of comprehensive planting-breeding in paddy fields on quality, yield and yield component of rice, characteristics of photosynthetic matter production, and economic benefits were systematically investigated in this study. The results showed that, compared with CK, the rice yield of different modes of comprehensive planting-breeding in paddy fields was significantly decreased by 3.66%-7.54%, and the RD mode reduced the least, and the RK mode reduced the most. Compared with CK, the reduction of rice yield in different modes of comprehensive planting-breeding in paddy fields was mainly due to lower dry matter accumulation at maturity stage, which was resulted from the smaller leaf area index, lower photosynthetic potential, crop growth rate, and net assimilation rate in main growth stages; and due to less total number of spikelets, which was caused by significant decreasing in panicle number per hectare and number of spikelets per panicle. Compared with CK, the different modes of comprehensive planting-breeding in paddy fields significantly reduced the head milled rice rate by 2.40%-4.37%, decreased the chalkiness by 8.14%-11.14%, increased the amylose content by 9.35%-13.80%, reduced the protein content by 6.29%-10.01%, and raised the taste value by 3.91%-11.69%. Compared with CK, the peak viscosity, hot viscosity, final viscosity, and breakdown of RVA parameters of rice starch were increased by 2.75%-12.65%, 3.24%-19.63%, 2.47%-14.79%, and 1.67%-5.78%, respectively, while the setback was decreased by 2.54%-15.15%. The economic benefits of different modes of comprehensive planting-breeding in paddy fields were 80.93%-511.52% higher than CK, which was mainly due to the increase in the income of aquatic (poultry) breeding products and the increase in the price of rice quality. In conclusion, comprehensive planting-breeding in paddy fields was an alternative rice planting mode, that could guarantee a stable rice yield, improve rice quality, and increase the comprehensive benefits. [ABSTRACT FROM AUTHOR]

Pedestrian re-identification searches for specific pedestrians in different environments, which has attracted widespread attention from domestic and foreign scholars in recent years. At present, pedestrian re-recognition algorithms mostly use a combination of local features and global features, and the training test on a single data set has achieved very good results. However, the results in the cross-domain test are not satisfactory, and the generalization ability is low. This paper proposes a cross-domain pedestrian re-recognition method based on deep capsule network. Through the view angle classification training task, the model can learn the effective features of the pedestrian in the image, and these features can be directly transferred to the pedestrian re-recognition task, alleviating the problem of insufficient generalization ability of pedestrian re-recognition. Experimental results show that this model is superior to all current pedestrian re-recognition methods based on unsupervised learning and has good generalization ability. [ABSTRACT FROM AUTHOR]

Myxozoans are common microparasites in wild and farmed fish, and some species cause severe disease in cultured gibel carp. During the investigation of actinospores in oligochaetes from the gibel carp ponds form April 2018 to July 2019, nine actinospore types were found in the oligochaete Branchiura sowerbyi Beddard. Based on morphological characteristics, they were identified into six collection groups, including one Raabeia-type, two Aurantiactinomyxon- types, two Neoactinomyxum-types, two Triactinomyxon-types, two Echinactinomyxon-types and one Hungactinomyxon- type. The present study described six of them, Triactinomyxon type HZ, Triactinomyxon type DF, Echinactinomyxon type LY1, Echinactinomyxon type LY2, Neoactinomyxum type LY1 and Hungactinomyxon type DF. Blastn search using SSU rDNA gene sequences indicated that Triactinomyxon type HZ and Triactinomyxon type DF have the highest 93.39% and 94.48% homology similarity with Triactinomyxon type CZ, respectively. Echinactinomyxon type LY1 and Myxobolus lentisuturalis have the highest similarity (96.88%, AY119688); Echinactinomyxon type LY2 has the highest similarity with Hungactinomyxon type 1 (97.86%, AY779062); Neoactinomyxum type LY has the highest similarity with Thelohanellus sp. (92.48%, MK412938); Hungactinomyxon type DF has the highest similarity with Hungactinomyxon (99.41%--99.64%). Phylogenetic analyses showed that Triactinomyxon type HZ and Triactinomyxon type DF clustered in the Chloromyxum subclade; Echinactinomyxon type LY1 and Echinactinomyxon type LY2 clustered in the Myxobolus clade; the Neoactinomyxum type LY1 clustered in the Thelohanellus clade. [ABSTRACT FROM AUTHOR]

Sillago sihama is a tropical fish from India to the western Pacific. It is widely distributed in the coastal waters of southern China and is one of the most important economic fish species. The factor inhibiting hypoxia inducible factor-1 (fih-1) is a key factor in the hypoxia signal pathway. It plays an important role in the hypoxia adaptation in fishes. The fih-1 gene of S. sihama was cloned, and its cDNA sequence was 1280 bp, including an open reading frame of 1065 bp, encoding 353 amino. The structure prediction found that there was a JmjC conserved domain. Multi-sequence alignment and cluster analysis based on fih-1 amino acid sequences showed that the S. sihama was closely related to Larimichthys crocea and Lates calcarifer, bur farther to mammals, amphibians, and birds. The fih-1 was strongly expressed in the testis, ovary, and muscle, followed by the gill, heart and liver, but weakly expressed in the brain. The expression of fih-1 gene in gill and heart increased significantly after 1-hour hypoxia stress, and it continued to increase significantly after 6 hours. After 4 hours of normal dissolved oxygen, the expression decreased significantly but it was still higher than the normal level (P<0.05). This study revealed that fih-1 gene plays an important role in the hypoxic signal conduction pathway and provides candidate genes for carrying out and explaining the genetic mechanism of S. sihama. [ABSTRACT FROM AUTHOR]

A two-dimensional LII (2D-LII) experiment system was established to first measure the soot volume fraction distribution in the Gülder ethylene diffusion flame. Compared with the extinction method and the single-point LII calibration method, the experiment results show its validity. The 2D-LII setup was then used to investigate the effects of cottonseed oil on soot formation of vaporized diesel laminar diffusion flame produced on a liquid burner. The results show that with increasing the blending ratio both the maximum volume fraction and the total amount of soot decrease. In the flame centerline region, the soot volume fraction first increases with increasing the flame height to reach a peak and then decreases towards the flame tip. The peak value of the soot concentration appears in the flame-wing in the lower part of the flame and moves towards the flame centerline with increasing the flame height. [ABSTRACT FROM AUTHOR]

Terrain is an important factor in land landscape pattern change. To reveal the spatial and temporal characteristics and variation of landscape pattern along a terrain gradient, we used three remote sensing images and digital elevation model (DEM) data of Fuzhou in 1995, 2005 and 2015 to investigate the topographic gradient effect of landscape pattern and the cause of formation based on terrain index, land use distribution index, geo-informatics map analysis and landscape index. The results showed that forestland was mainly distributed in middle-low, middle-high and higher level terrain, while farmland, water body, construction land and unused lands were mainly distributed in the low rank terrain. From 1995 to 2015, the area of forestland, farmland, and unused land in Fuzhou decreased, while that of construction land and water body increased. The change of landscape type was stable, which was mainly distributed in middle-low, middle-high, and high grade terrain gradient region. In addition, landscape pattern changes were obvious across the terrain gradient. The landscape type of low terrain area mainly shifted to the construction land, but farmland and forestland had an alternation change in the middle-low and middle-high terrain area. The characteristics of landscape pattern fragmentation, landscape heterogeneity and landscape diversity in the study area had been increasing year by year, but they had decreased with the elevation of terrain. [ABSTRACT FROM AUTHOR]

In order to accurate reflect the highly non-linear relationship between structural parameter uncertainty of frame and its responses, and promote reliability design level of frame. A multi-objective reliability optimization design method based on GA weighted network is proposed. Firstly, establish the parametric analysis model of the frame and carry out the experimental design. After that, the sample data of frame responses and uncertain parameters are obtained. Secondly, the initial BP neural network between responses and uncertain parameters is established. Furthermore, using mathematical model to express BP neural network. On this basis, four kinds of weight coefficients are introduced. Then the GA method is used to find optimal combination mode of weight coefficients, so as to improve the accuracy of the initial BP neural network model. Moreover, make the internal relationship between frame responses and uncertain parameters more accurate. Finally, taking the multi index failure probability of the frame as the objective function, the optimization model is constructed. And the multi-objective reliability optimization design of frame is carried out. The results show that there is a better uniformity of prediction results between improved model and test sample. The absolute error of maximum stress response is less than 1 MPa of them under standard working condition. The new frame parameter combination which is obtained by this method not only improve the frame comprehensive reliability, but also provides a reference for the adjustment and optimization of its design parameters.

Objective To investigate the characteristics and use skills of Perclose-Proglide and Angio-seal femoral artery vascular closure devices. Methods 190 patients who underwent interventional therapy were given Perclose-Proglide and Angio-seal vascular closure devices for femoral artery bleeding wound closure, respectively. The two kinds of femoral artery vascular closure devices were observed and compared in the success rate of closed immediately after hemostasis, operation time, closure intraoperative limb immobilization time, complications within 24 hours after surgery, the incidence of surgical wound hematoma within 48 hours, vascular closure device features and usage tips. Results After success of the femoral artery surgery wound closed, the success rates of immediate hemostasis of two devices were 100%, and there was no bleeding occurred within 24h after surgery in patients. The operation time and closure intraoperative limb immobilization time were (6.0 ± 1.21) min and (8 ± 0.8) h using Perclose-Proglide vascular closure device, while they were (2.0 ± 1.12) min and (8 ±0.5) h using Angio-seal (P < 0.05). Conclusion Both vascular closure device can achieve the purposes of safe and effective hemostasis with no major vascular complications if we can master their characteristics and use skills and apply for the right patients. [ABSTRACT FROM AUTHOR]

Objective To explore a method of building non-obstructive azoospermia model of Wistar rat with cyclophosphamide and busulfan. Methods 160 adult Wistar rats were randomly divided into 10 groups )n = 16). Rats in group 1-3 were given busulfan 20 mg/kg, 15 mg/kg, 10 mg/kg by single intraperitoneal injection respectively. Rats in group 4-6 were given cyclophosphamide 200 mg/kg, 100 mg/kg, 75 mg/kg by single intraperitoneal injection respectively. Rats in group 7-9 were given busulfan 40 mg/kg, 20 mg/kg, Cyclophosphamide 200 mg/kg by single oral administration respectively, Rats in group 10 were given normal saline 2.0 mL by single intraperitoneal injection. If the sperms and the sperm cells could not be found in the biopsy rat testis and epididymis after a reproductive cycle of rat (38 days), the non-obstructive azoospermia model was successfully established. Results The tissue biopsy of testis and epididymis showed the Azoospermia model was successfully build in group A, B, G and H. Sperm and sperm cells in testis and epididymis tissue were not found, and the survival rates of rats were 18.75%, 50%, 6.25% and 12.5%, respectively. The ideal way to build non-obstructive azoospermia model might be gained by single intraperitoneal injection of Busulfan 15 mg/kg, which had the lowest mortality. Conclusion Single intraperitoneal injection of busulfan 15 mg/kg is an ideal method for building non-obstructive azoospermia model of wistar rats, the success rate is 50%. [ABSTRACT FROM AUTHOR]

[Objective] In order to provide the basis for high yield and quality cultivation techniques of Newhall navel orange fruit in low-latitude and high-altitude areas of Guangxi, the correlation of temperature, precipitation, sunlight and other meteorological factors with growth and development laws of Newhall navel orange fruit in low-latitude and high-altitude areas was investigated. [Method] Taking Newhall navel orange from Helang village, Nanpo township, Jingxi country, Baise city of Guangxi as materials, the vertical and horizontal diameters of fruit were regularly measured, and then Logistic equation was establish for fitting relationship between fruit volume growth index and growth time to analyze correlations between fruit volume growth and temperature, and between precipitation and sunlight. [Result] The results showed that vertical and horizontal diameter of Newhall navel orange fruit had 3 obvious growth peaks during the whole growth and development process, presenting growth of single S-shaped curve. The correlation coefficient of Logistic fitting model reached a very significant level (P<0.01). the fruit growth was the most efficiency from late August to early September. The monthly net growth of fruit from April to November showed significantly positive correlation with temperature, precipitation and sunlight (P<0.05). Newhall navel orange fruit in low-latitude and high-altitude area was characterized by big fruit, single fruit weight of 278.7 g, fruit shape index of 0.96, soluble solid content of 11.15%, titratable acid of 3.58 g/100 mL, TSS-Acid ratio of 3.10:1 and sugar-acid ratio of 2.90:1. [Conclusion] The growth dynamic changes of Newhall navel orange fruit in low-latitude and high-altitude areas of Guangxi can be fitted using the Logistic equation model, and the growth and development of the fruit was closely associated with temperature, precipitation and sunlight. The fruit growth and development can be promoted by taking advantage of meteorological conditions during fruit enlargement period (from August to September). [ABSTRACT FROM AUTHOR]

Aiming at the calculation method of the quadratic NURBS curve and the double quadratic NURBS surface, this paper presented a new method of calculating the weight coefficient for quadric NURBS curve and surface. It made some improvements in many aspects, such as : improving the date normalization and the calculation method of the correlation vector and correlation matrix, avoiding inverse matrix calculation, and adding a point coefficient when calculating the weight coefficient. Compared with the existing methods, this method could calculate the weight coefficient of each point more quickly. It used several classic numerical examples to validate the proposed method. The results show that using the weight coefficient which is calculated by the proposed method to fit the curve and surface can get a higher precision than the existing methods. [ABSTRACT FROM AUTHOR]

Reservoir fractures have a significant effect on improving the physical property of tight sandstone reservoir, carbonate rock reservoir and unconventional low-permeability reservoir such as tight conglomerate rocks, igneous rocks and shale rocks. The researches on reservoir fracture were summarized, several methods of recognition and prediction on reservoir fracture were analyzed, and several key questions in reservoir fracture research were discussed. The results show that the recognition technology of reservoir fracture is a multi-division synthetic system composed with point (core and slices), line (logging), surface (similar surface outcrops), volume (seismic data) and time (dynamic production data); the qualitative prediction of reservoir fracture is mainly based on the relationship between fracture and structural location, lithology; the quantitative prediction methods contain inter-well direct interpolation, curvature, energy and rock failure (two-factor method), seismic, fractal dimension, tectonic stress field numerical simulation and multi-parameter criterion, etc.; each prediction method of reservoir fracture has its own advantage and disadvantage, thus the combination of multiple methods can realize the efficient prediction of reservoir fracture; the key questions of reservoir fracture research contain the fracture distribution prediction and elaborate characterization, fracture dynamic parameters and fracture 3D geological modeling. Finally, reservoir fracture prediction and modeling should be based on confirming the genesis, evolution and primary controlling factors of reservoir fracture in exploration and development of hydrocarbon fields. [ABSTRACT FROM AUTHOR]

[Objective]The present study was conducted to breed new peanut variety with thin shell, high crude fat content, high and stable yield, and wide adaptability, which is suitable for planting in Guangxi peanut production area in order to lay the foundation for the sustainable development of Guangxi peanut industry. [Method]The fine germplasm 0442/3001-18 was used as female parent and 03-Qiu/3016 with disease resistance as male parent to conduct hybridize, and multi-generation directional selection for many years was performed towards the hybrid progenies. The pot type, kernel rate and yield potential were selected from the low generations of hybrid progenies, and the yield traits, crude fat content and stress resistance were focused on the high generations of hybrid progenies. [Result]The new peanut variety Guihua 32 showed characteristics with early maturity, high and stable yield, thin shell and wide adaptability and so on. The average pod yield of Cuihua 32 was 4361.2 kg/ha in peanut variety comparative test during 2010-2011, which was increased by 11.19% as compared to the target control variety Cuihua 17. The average pod yield of Guihua 32 was 3975.0 kg/ha in Guangxi peanut varieties regional trial during 2012-2013, which was decreased by 1.43% compared with the control variety Guihua 21. While its average seed yield was 2743.1 kg/ha, which was 7.32% higher than that of Guihua 21. In the test and demonstration of Wuming county of Guangxi, the dry pod yield of Gui-hua 32 was 4084.6 kg/ha, which was 11.78% higher than Guihua 17; its fresh pod yield in Zhongshan county was 9445.5 kg/ha. Guihua 32 was characterized by 52.12%-54.10% of crude fat content, 25.00% of protein content, 79.4% of full-pod rate, 81.8% of double-kernel pod rate, 186.3 g of 100-pod weight, 71.3 g of 100-seed weight, and 70.3% of kernel rate. The agronomic traits of Guihua 32 was superior to Guihua 17, and it was approved and registered by Guangxi Committee for Crop Variety Registration in June, 2014. [Conclusion]The new peanut variety Guihua 32 is a good alternative variety for Guihua 17 being better comprehensive traits, and is suitable for extending and planting in dry slope land of Cuangxi peanut production area. [ABSTRACT FROM AUTHOR]

The responses of high-density HMX-based and PETN-based explosives to electrostatic discharge (ESD) are tested by JGY-50 electrostatic spark tester. Two discharge inodes including impenetrating discharge and surface discharge are employed to simulate the different ESD scenarios. The results show that the response of high-density explosives include heat and shock effects. The heat effect of PETN-based explosive and the shock effect of HMX-based explosive dominate under ESDs. No detonation is probably observed because there is less accessible surface area and low permeability of high-density solid explosive allowing little convective burning, and the energy of ESD can not be coupled effectively to high-density solid explosives. [ABSTRACT FROM AUTHOR]

[Objective] The present study was conducted to clone chalcone synthetase (CHS) and chalcone isomerase (CHI) genes in kenaf, and construct CHS plant expression vector in order to lay the foundation for further researches of their functions in kenaf ferility and stress resistance. [Method] The DNA and cDNA of kenaf male sterility (P3A) and maintainer line (P3B) anthers were amplified after extracting of DNA. The CHS and CHI genes were cloned by using homologous cloning method based on kenaf transcriptome data from high-throughput sequencing. By using carrier recombination technology, the plant expression vector of CHS gene was constructed. [Result] It showed that, the cDNA full-length sequence of CHS was 1236 bp in length, contained an open reading frame (ORF) of 1170 bp, and encoded 389 amino acids. The DNA full-length sequence of CHS gene was 1329 bp in length, and contained two exons and one intron. The cDNA full-length sequence of CHI was 724 bp which contained an open reading frame (ORF) of 630 bp and encoded protein with 209 amino acids. The length of DNA sequence in CHI gene was 1087 bp in length which contained four exons and three introns. [Conclusion] The sequences of CHS and CHI genes was successfully cloned, and the constructed plant expression vector pBI121-CHS of CHS gene could be used for its functional researches. [ABSTRACT FROM AUTHOR]

Against uniform state which was seldom considered in the current study of train energy optimization control, this paper studied the condition combination and energy consumption algorithm by combining the uniform state. Through the dynamics analysis on train operation process, on the basis of in-depth study for energy consumption calculation and MATLAB numerical calculation advantage, it designed train energy consumption simulation program. Adhere to the principle of train operation timely, it put forward train control strategy considering the uniform velocity state, and constructed the model with the constraint of railroad section speed limit and working condition transition and solved by the modified genetic algorithm-simulated annealing (MGASA). From the optimization results can be derived that compared with the previous optimization strategy, compression ratio of train running time comes to 5.66% and energy consumption increased only 1.89%. The results show that the optimization effect is better. The study of condition combination considering the uniform state has stronger practicability and can provide theoretical guidance for the driver as well as the design of ATO system. [ABSTRACT FROM AUTHOR]

[Objective] The 6-phosphogluconate dehydrogenase (6PDGH) gene of kenaf sterile line and maintainer line were cloned in present study and its RNAi vector was constructed in order to lay the foundation for further research of this gene function in anther development of kenaf(Hibiscus cannabinus L.). [Method] The assembling cDNA sequences of 6PDGH gene were obtained based on high-throughput sequencing data of kenaf anther transcriptome and bioinformatics method. The cDNA and total DNA of CMS P3A and maintainer line P3B anthers were used as template to clone the full-length of 6PGDH gene According to RNAi vector designing rule, the 389 bp gene-specific fragment of 6PGDH cDNA sequence was used as RNA interference fragment to insert into pKANNIBAL vector in forward and reverse direction, respectively, to construct the RNAi vector. [Result] The full-length of cloned 6PGDH gene in P3A and P3B anthers was 1751 bp in length, which contained a 1458 bp open reading frame(ORF) encoding 485 amino acids and had no intron. Only two bases' differences were found between base sequence of CMS and maintainer line. The amino acid sequence of 6PGDH gene shared 75.07%, 84.57%, 86.50%, 87.24%, 91.19% and 92.01% of homology with Arabidopsis thaliana (AY084486), Zea mays (AF061838), Glycine max (B007907), Medicago sativa (U18239), Populus trichocarpa (XM_002329211), Ricinus communis (XM_002530757). The RNAi vector of 6PGDH gene in kenaf was constructed successfully to obtain the interference expression vector pART27-pKANNIBAL-R1+2. [Conclusion] The full-length sequence of 6PGDH gene in kenaf was cloned successfully, and the constructed RNA interference vector pART27-pKANNIBAL-R1+2 could be used for studying 6PGDH gene function of kenaf. [ABSTRACT FROM AUTHOR]

Two functions of testis are sperm production and steroidogenesis. Those hormones related to male reproduction include testosterone, follicle stimulating hormone, luteinizing hormone, estradiol and prolactin. Diabetes mellitus (DM) is the metabolic syndrome characterized by hyperglycaemia due to insufficient insulin, which is accompanied by metabolic disorders of fat, protein, water and electrolyte. More than 90% DM are type 2 diabetes(T2DM). Long-term diabetes can lead to dysfunction and chronic damage in various tissues, especially in eye, kidney, heart, blood vessel and nerve. Male patients with DM are often accompanied with dysfunction of reproductive endocrinology. Androgen level in male DM patients is lower than that in normal men. The symptoms in those patients with lowered hormones include erectile dysfunction and loss of libido, while the metabolic disorders were aggravated by physiological and biochemical mechanisms. All those risk factors are related to atherosclerosis and coronary heart disease (CHD). We herein reviewed the dysfunction of male reproductive endocrinology in patients with DM, so as to provide reference for the treatment of diabetes. [ABSTRACT FROM AUTHOR]

In order to prevent accident events in public places by analyzing and forecasting pedestrian state in video surveillance scenario, this paper proposed an improved inner-grid parking cellular automata (IPCA) model. Specifically, according to the variance of pedestrian speed, the model acquired speed value in a cellular grid under real situation. Meanwhile, it introduced parking time in cellular grid to eliminate position error of each unit during its proceeding, determining forward and content parameters by a human-visual-field-like triangular visual field. Results show that IPCA is independent of pedestrian motion data of a certain video frame, and its simulation is capable to verge to a real video scenario. Hence, IPCA brings a better accuracy. [ABSTRACT FROM AUTHOR]