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Copyright of Hydrographic Surveying & Charting / Haiyang Cehui is the property of Hydrographic Surveying & Charting Editorial Board and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Drainage & Irrigation Machinery Engineering / Paiguan Jixie Gongcheng Xuebao is the property of Editorial Department of Drainage & Irrigation Machinery Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Journal of Contemporary Pediatrics is the property of Xiangya Medical Periodical Press and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Computer Measurement & Control is the property of Magazine Agency of Computer Measurement & Control and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Research & Exploration in Laboratory is the property of Research & Exploration in Laboratory and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Objective Background Suicide has become a major public health issue of global concern. Suicidal ideation represents the initial psychological and one of the strongest predictorsactivities associated with suicidal behavior. Suicidal ideation is a dynamic state factor rather than a static trait factor, so it is necessary to study the development trajectory of suicidal ideation and its related factors. Objective To investigate the development trajectory and relatedfactors of suicide ideation college students. Methods From 2019 to 2021,1438 college students in a university in Guangdong Province were selected for three longitudinal tracking each October by using the method of convenient sampling. The Self - rating ideas of suicide scale(SIOSS) was used to measure the level of suicide ideation. Data analysis was mainly based on the Latent Growth Mixed Model(LGMM) to analyze the development trajectory of students' suicide ideation. Multivariate Logistic Regression model was established to analyze the related factors to the variation of each potential category of suicidal ideation. Results From 2019 to 2021, the total scores of college students' suicidal ideation were 3. 79 ± 2. 87, 3. 71 ± 2. 90 and 3. 32 ± 2. 87, showing a decreasing trend over time. The development tendencies of college students' suicide ideation have been classified into 3 categories: Cl group (worsening suicidal ideation group) (11.8%), C2 group (persistent low suicidal ideation group) (79.6%), and C3 group (relieving suicidal ideation group) (8.6%). Compared with Cl group, college students who had an average (OR = 2. 52, 95% CI: 1. 31 -4. 86)or happy childhood (OR = 3. 95,95% CI: 2. 02 - 7. 74), no history of suicide attempt (OR = 9. 03, 95% CI: 3, 49 - 23. 36), and were extroverted (OR = 1. 03, 95% C/: 1. 01 - 1. 05) were more likely to enter C2 group. Students who were from cities (OR = 0. 54, 95% CI: 0, 31 - 0. 93), got high neuroticism scores (OR = 0. 86, 95% CI: 0, 84 - 0. 88) were less likely to enter the C2 group. College students with happy childhood life(OR = 3. 29, 95% CI: L 40 - 7. 74) were more likely to enter the C3 group, but students from cities (OR 二 0. 37, 95% C/;0. 18 - 0. 78) were less likely to enter the C3 group. Conclusion The development tendencies of college students' suicide ideation can be classified into three categories: worsening suicidal ideation group, persistent low suicidal ideation group, and relieving suicidal ideation group. The developmental trajectory of suicidal ideation is related to birthplace, childhood life, suicide history, and personality traits. [ABSTRACT FROM AUTHOR]

Studying the evolution of PLE (production-living-ecological) spatial pattern and its driving factors in the Dongting Lake Eco-economic Zone can not only reveal the temporal and spatial evolution of the land spatial pattern, but also provide a theoretical basis for optimizing the regional land spatial structure. Based on the data of land use types, natural environment and socio-economic data of Dongting Lake Eco-economic Zone from 1990 to 2020, The spatial pattern evolution and driving factors of PLE space (production-living-ecological space) in Dongting Lake Ecological Economic Zone from 1990 to 2020 were analyzed by using ArcGIS spatial analysis, dynamic degree of PLE Space, transfer matrix of PLE Space and geographical detector. The results show that from 1990 to 2020, the PLE Space in Dongting Lake Eco-economic Zone is mainly based on production and ecological space, showing a trend of increasing living and ecological space while decreasing production space. From 1990 to 2020, the Dongting Lake Eco-economic Zone is dominated by the mutual transformation of production and ecological space, followed by the transformation between production and living space, and the mutual transformation between living and ecological space is the least. From the perspective of the dynamic degree of the comprehensive PLE Space in the districts and counties, the high and higher values of the dynamic degree of the districts and counties from 1990 to 2020 are mainly located in the northern part of the study area, the middle equivalent and lower value areas are mainly located in the middle of the study area, and the low value areas are mainly located in the eastern and western parts of the study area. Slope, elevation, annual average temperature, soil type, distance from river system, spatial distribution of population and distance from urban center are the main influencing factors of the evolution of PLE Space in Dongting Lake Eco-economic Zone, the interaction of the main factors is double factor enhancement. The research is expected to provide support for coordinating regional Production-Living-Ecological Space conflicts and provide reference for the Land space planning of the Dongting Lake Eco-economic Zone. [ABSTRACT FROM AUTHOR]

Experimental teaching is an important way to cultivate chemical talent, with experimental center serving as the primary platform for chemical laboratory education. The quality and construction level of the center significantly impact students’ scientific literacy and abilities. Amidst a new wave of university teaching reforms and the pursuit of world-class university status, the chemistry experimental center face new challenges, mainly from the diverse needs of departments under major categories enrollment, and the demands for integrated Bachelor-Doctoral talent cultivation under the Strengthening Basic Disciplines Program. To address these needs, experimental teaching must rely on a high-quality, multi-level experimental teaching platform. Thus, the chemistry experimental center has built up a foundational chemistry experimental teaching team, adhering to the principle of mutual teaching and learning, and promoting teaching through research. High-achieving, research-active faculty members who are passionate about teaching have been invited to join the team, participating in lectures, seminars, and teaching improvement initiatives. This approach has effectively met the diverse needs of multilevel talent cultivation, yielding positive results. [ABSTRACT FROM AUTHOR]

Copyright of Piezoelectrics & Acoustooptics is the property of Piezoelectric & Acoustooptic and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Hydrographic Surveying & Charting / Haiyang Cehui is the property of Hydrographic Surveying & Charting Editorial Board and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

At present the LED research still mainly LED external quantum efficiency as the main direction. Combined with the characteristics of the surface plasma ( SP ) , gallium arsenide material deposition of gold film and GaN light-emitting layer model were developed. Through SP enhanced function which yields between gold film and medium, the efficiency of LED light is significantly improved. Theoretic analysis is used the cycle of SP grating propagation and the coupling strength model, and the conclusion is that SP magnification luminous efficiency can meet the coupled radiation and emission of radiation efficiency. Luminous experimental results show that the structure of the metal film deposition can achieve a significant reduction in the reflectivity, then partial loss of energy changes to light emission, and enhances luminous efficiency. By analyzing parameters, the absorption rate reaches its largest value as the duty ratio is designed around 0.81, it can realize better effect of LED light enhanced by the SP; The enhancement effect of SP achieves to improve the weak photoluminescence, and illustrates that the luminescence of LED is nonlinear process. The nonlinear process can be used to detect different substrate medium with small amounts of radiation. [ABSTRACT FROM AUTHOR]

The value of an entity attribute on the web is usually provided by multiple data sources， but the values provided by them are not always the same， which affects the effective integration of data， so it is necessary to find out the true value among these given values. The existing truth finder algorithms mainly focus on the single type data kind， so a distance-based truth finding algorithm was proposed by considering heterogeneous data jointly. Firstly， for a specific data item， the data item vectors were calculated on the basis of the distance between the claimed value from every source and the truth value. The KMeans algorithm was used to get initial clustering. Then， alternate clustering and trust analysis were iteratively performed， i.e.， within each cluster， confidence of facts and trustworthiness of sources were updated with the idea of optimization and joint heterogeneous data. Each data item vector was recalculated and reclustered， and when each cluster was stable， the iteration would be terminated. The experiment results showed that the proposed algorithm has a higher accuracy for truth finding because of the fine grained partition of source quality and the joint model of heterogeneous data. [ABSTRACT FROM AUTHOR]

[Objective] This study aimed to establish the rapid and effective analysis method for identification of Sorghum forage varieties. [Method] The digital fingerprint, identification and clustering of 12 forage varieties of Sorghum bicolor, Sorghum dochna, Sorghum Sudanense and Sorghum bicolor x S. sudanense are respectively analyzed by the ISSR molecular marker technique based on the mixed DNA pool [Result] 13 amplification products with high polymorphism and good repeatability are screened from 110 ISSR primers by ISSR. The genetic similarity coefficient of 12 forage varieties is 0. 6867 -0.9036. When Gs is 0. 786, 12 forage varieties can be divided into four groups. There are six S. bicolor xS. sudanense varieties and two S. bicolor varieties in Group I, two S. dochna varieties in Group II, one S. sudanense variety in Group III and one S. sudanense variety in Group IV. Three core primers (S37 , S35 and S50) are selected to differentiate ISSR digital fingerprint of 12 Sorghum forage varieties. [Conclusion] The ISSR molecular marker technique can effectively identify the purity and true or false of Sorghum forage varieties and reveal genetic difference among Sorghum forage varieties. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Agricultural Science & Technology (1008-0864) is the property of Journal of Agricultural Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Geomatics & Information Science of Wuhan University is the property of Geomatics & Information Science of Wuhan University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Agro-Environment Science is the property of Journal of Agro-Environment Science Editorial Board and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Journal of Tissue Engineering Research / Zhongguo Zuzhi Gongcheng Yanjiu is the property of Chinese Journal of Tissue Engineering Research and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Objective: To compare the clinical effect of domestic and imported omeprazole injection in the treatment of peptic nicer bleeding. Methods: According to the random sequence generated by the computer. 11S patients who were treated in digestive department of our hospital from April 2013 to May 2015 were randomly divided into 2 groups, 59 cases in each group.The control group was given treatment of imported ding losec. while the study group was given treatment of domestic drag aoxikang. and two groups were treated continuously for 7 days. The incidences of gastrointestinal reactions, dizziness and palpitations, the average treatment tune, and clinical therapeutic effects were compared, in addition, the costs of treatment in the two groups were analyzed. Results: There were no significant differences in the incidences of gastrointestinal reactions, dizziness and palpitations and the average treatment tune between the study group and the control group (P>0.05). There was no significant difference between the two groups in the treatment effect after rank sum test (P>0.05). The total effective rates (96.61% vs 94.91%) were equivalent, the differences were not statistically significant (P>0.05), but the costs of using domestic drags were lower than that of imported drags. Conclusion: The clinical curative effects of domestic aoxikang and imported losec in treatment of peptic ulcer bleeding have no significant difference, which can have a good therapeutic effect, but the economy of aoxikang is more better. [ABSTRACT FROM AUTHOR]

Because of its simple structure, pipeline without cracking in winter and other advantages, solar air collectors are getting more and more applications in industry, agriculture and residence. However, air has the disadvantages of small specific heat and density, so how to increase the collector efficiency and heat collection of air collectors has become the focus of research on solar air collectors. In recent years, multi-surface condenser air collector has gradually developed, which has the advantages of small size, easy installation and maintenance management, and high outlet temperature. Our research team has put forward a multi-chamber trough solar air collector with single collector tube. However, it has the shortcomings of low air flow and low heat collection efficiency however. In order to improve solar greenhouse solar energy utilization, this study proposed a new type of multi-chamber trough solar air collector with dual collector tubes to improve the collector performance. This collector is combined with the heat storage ventilation wall of solar greenhouse with solar active-passive “triple” structural phase change to constitute the active solar thermal storage system, which is used in Urumqi solar greenhouse. Based on the theory of optics and heat transfer, the experiment was designed and carried out to investigate the influence discipline of different parameters on thermal performances and optical performances for multi-chamber trough solar air collector with dual collector tubes. The parameters include the structure size (the relative position and the length of double collector tubes), air velocity inside the collector, inlet air temperature, and solar radiation. The test instruments include air collector, temperature sensor, flowmeter and data collection system. The experiment results illustrate that the collector performance of the double-tube collector is better than that of the single tube collector. Compared with the single collector tube concentrator, the air flow of the dual increased by 100%, the heat collection per unit area of the dual increased by 16%, and the heat collection efficiency of the dual increased by 9% (the heat collection efficiency of the dual was 44%-52% without tracking in winter). The relative position of double collector tubes, air velocity inside the collector and inlet air temperature were discussed in the study. The relative position 1 of double collector tubes is the best and the best air flow rate in the tube is 1.8-2.0 m/s. The collector was also applied to the solar greenhouse in Urumqi, and the results illustrate that: From November 2015 to February 2016, when the collector length is 16 m and the air velocity inside the concentrator is 2.0 m/s, the heat collecting system can provide solar thermal energy of about 50-65 MJ/day for solar greenhouse on the condition of sunny days, 35-45 MJ/day on the condition of cloudy days and 20-25 MJ/day on the condition of overcast days which have weak solar radiation. The heat collecting system can provide solar thermal energy of about 5 325 MJ for solar greenhouse by active heat storage of the wall in whole winter. This study can provide the reference for the thermal performance optimization of the collector and the new technical support for the efficient use of solar energy in solar greenhouse. [ABSTRACT FROM AUTHOR]

Copyright of Chinese Journal of Tissue Engineering Research / Zhongguo Zuzhi Gongcheng Yanjiu is the property of Chinese Journal of Tissue Engineering Research and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Modern Medicine & Health is the property of Journal of Modern Medicine & Health and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Drainage & Irrigation Machinery Engineering / Paiguan Jixie Gongcheng Xuebao is the property of Editorial Department of Drainage & Irrigation Machinery Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In the application of Internet of things，the RFID tag in its life cycle w ill involve the issue of transfer of ownership，this paper put forward an improved Rabin encryption algorithm of RFID tag ownership transfer agreement. The improved protocol did not rely on the trusted third party,at the same time agreement instead of the traditional cryptographic hash function，it adopted Rabin algorithm to realize the information encryption. The challenge response mechanism，the use of the Status flags to signal the belonging of the ownership of a label the current implementation ownership transfer of security tag. The results show that the improved protocol not only meets the security requirements of tag ownership transfer，and overcomes the brute force attack safety defects existing in the original agreement，at the same time reduces the amount of calculation in the process of tag，in terms of safety and efficiency compared with the existing RFID tag ownership transfer agreement has large improvement. [ABSTRACT FROM AUTHOR]

Copyright of Research & Exploration in Laboratory is the property of Research & Exploration in Laboratory and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Shanghai Jiaotong University (Medical Science) is the property of Journal of Shanghai Jiaotong University (Medical Science) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The goal of this paper was to have a better understanding of chloroplast inheritance patterns and identify the hybrid parent in Glycyrrhiza. A total of 68 individuals of Glycyrrhiza were selected including 34 parental species, G. uralensis, G. glabra, G. inflata and 34 artificial interspecific crosses, G. uralensis♀ × G. glabra♂, G. glabra♀ × G. uralensis♂, G. uralensis♀ × G. inflata♂ and G. inflata♀ × G. uralensis♂. Thirty-four artificial interspecific crosses were performed and the sequence polymorphisms of chloroplast DNA (cpDNA) and internal transcribed spacer (ITS) of nuclear gene of parents and progenies were studied. Sequence analysis showed that ITS sequences of parents and progenies had the same length of 614 bp and altogether four variable sites, with three genotypes. Two different ITS sequence copies at four variable sites were found in each individual of F1 hybrids, one from the paternal and the other from the female parent, about which the detection ratio was 100%. It suggested that 34 artificial interspecific crosses produced successful F1 hybrids in this research and genetic trait of ITS could infer parents of Glycyrrhiza. Sequence analysis showed that the cpDNA rbcL, matK and trnH-psbA sequences of parents and artificial interspecific crosses had the same length, within a total of four variable sites and six genotypes. Two different cpDNA haplotypes were found in Glycyrrhiza. The cpDNA haplotypes of F1 hybrids matched those of the male parents and that ratio was up to 97.1%, indicating that the genetic trait was mainly inherited from the paternal parent. This result demonstrated that the chloroplast inheritance pattern of Glycyrrhiza was mostly paternal inheritance, which provides new insights into the use of cpDNA markers in studies of natural hybrids and genetic polymorphism in Glycyrrhiza. [ABSTRACT FROM AUTHOR]

Copyright of Research of Environmental Sciences is the property of Research of Environmental Sciences Editorial Board and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Based on the meteorological observation and winter wheat production data during 1981-2012 from 88 counties well spreading over the winter wheat growing regions of Sichuan Province, the sensitivity and vulnerability of winter wheat production to climatic factors and climate change were estimated by using the regression method. The results showed that the air temperature and diurnal temperature range increased in the entire growth period of winter wheat during 1981-2012, but the precipitation and solar radiation showed decreasing trends in some counties while showed increasing trends in others. With a 1 ℃ increase of air temperature in growing-season, 1 ℃ increase of diurnal temperature range, 100 mm decrease of precipitation and a 100 MJ· m-2 decrease of radiation, the yield of winter wheat in some of these regions was sensitive to the changes. From sowing to maturity, the area of winter wheat that was sensitive to decreasing precipitation is the largest, which took 6.5% of the total sown area. As for vulnerability, the area vulnerable to decreasing radiation was the largest, which was 2.4%. As for different growth stages of winter wheat, the area of winter wheat that were sensitive and vulnerable to the decrease of radiation during sowing to jointing period were the largest, which were 9.4% and 7.9% respectively. Taking the four climatic variables together into consideration, the area of winter wheat that had significant change in yield was roughly 40.0%, and the yield changed -23.0%-9.5%, but the area showed vulnerability took about 14.0%. The region with yield vulnerability mainly located in the northwest plateau of Sichuan, and part of western basin, southern basin and southwest Sichuan. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Vibration Engineering is the property of Nanjing University of Aeronautics & Astronautics and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Image & Graphics is the property of Editorial Office of Journal of Image & Graphics and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Vetiveria zizanioides L. were planted on the coal spoil-heaps in Dahe coal mine located at Liupanshui in Guizhou province to improve the vegetation restoration and ecological management in 2002, 2005, 2007, 2009, and 2013, respectively. Soil samples were taken from these different areas to measure the contents of Cu, Zn, Cd, Pb and As for evaluating the effect of different planting years of vetiver on the distribution of heavy metals in coal spoil-heaps.Results show that the contents of five heavy metals are decreasing with the increase of vetiver planting years.The contents of Cu, Zn and Cd in coal spoil-heap soil were higher in 0-10 cm than in 10-20 cm and 20-30 cm (P<0.05), while the contents of Pb and As showed as 30-50 cm > 10-30 cm>0-10 cm (P<0.05). The contents of Zn and As are sharply decreased with the increase of vetiver planting years.The contents of Cu and Cd are clearly decreased in the early years while the degree of decrease is slowly in the last few years. The contents of Pb are decreased after six planting years,while it is similar when the planting years early than 2009. The study may provide a theoretical foundation and evaluation system for ecology restoration and soil reuse in coal spoil-heaps areas. [ABSTRACT FROM AUTHOR]

River crab is a kind of conventional tasty aquatic product with high value. Now in China there is still a high demand and price for fresh and live crab with bigger size in market, while a low demand and price for the ones with smaller size. Therefore, deep processing of small size crab and producing meat into shelf-stable crab powder as middle food material are considered. In this way not only the utilization of low valued crab is promoted, but also the overall economic return of crab farming is greatly upgraded. In this process, separating the meat and shell of river crab is one of the most important steps. However, in previous studies of mechanical peeling method, the separation result of shell and meat of crab leg was not satisfactory. In allusion to the problems of high labor intensity of shell and meat separation for river crab legs, low efficiency and easy meat contamination, a shell meat separation device of roller extrusion type is designed in the study. The device includes workbench transmission device, feeder and roller extrusion device. The main principle of the device is carrying crab legs by the slanting slide to the tip of a pair of rollers, which have the same diameter and rotating speed but in opposite directions, and then separating crab leg’s shell and meat through squeezing action. Transmission device consists of variable frequency motor, reduction gearbox, and so on. Feeder included slide for carrying, studdle and vibrator. The front end of slide for carrying heads inclines to a pair of rollers and the down end is connected with the vibrator which is supported by flexible studdle. Roller extrusion device consists of a pair of rollers and the plastic scrape above. Before operation, the pretreated crab legs are put into downward slant slide, and then crab legs are moving forward along the transportation way under the vibration of the machine into the tip of rollers to receive the backward extrusion. Treated by the upper roller, meat of crab legs are squeezed out and adhesive to the upper roller, and scraped down by plastic scraper blade. Legs’ shell falls down along plastic sliding plate. Thus the separation of crab legs and meat is done. To determine the optimum working parameters of the separation device, the separation efficiency, separation rate and meat quality are chosen as the performance indices, the feeding angle, roller clearance and rotating speed are chosen as the influence factors, and orthogonal test of prototype are carried out, in which the feeding angle is 30°-50°, the roller clearance is 0.8-1.2 mm, and the rotating speed is at 25-35 r/min. The experimental subject is healthy and strong crabs with a body weight of about 100 g. The washed crabs are put into the steamer for steaming. All crabs are teamed for 10 min and taken out from the steamer, and then the crab legs are taken down for separation experiment. With the above optimum parameters of the crab legs’ shell and meat separation device, the separation efficiency is over 16.9 kg/h, the separation rate (meat gaining rate) is between 92% and 99%, and the corresponding meat quality grade is 7.5-8.8, which show that the device has achieved a better separation efficiency, and realized the mechanical separation of crab legs’ shell and meat. The above experimental result also shows that the rotating speed dominates the separation efficiency while the feeding angle and roller clearance affect little; the roller clearance is the very factor affecting the separation rate, followed by the factor of feeding angle, and the rotating speed affects little; the roller clearance is the very significant factor affecting the meat quality while the feeding angle and rotating speed affect little. The experiments present the following result: the optimum operation parameters are the 40° feeding angle, the 35 r/min rotating speed and the 1.2 mm roller clearance. The study provides a reference to the further device design and the perfection of crab legs’ shell and meat separation mechanism. [ABSTRACT FROM AUTHOR]

Objective: To explore the characteristic of cognitive flexibility in young female patients with eating disorders (EDs）,including anorexia nervosa (AN) and bulimia nervosa (BN）,and its relationship with the clinical features of ED. Methods : Ninety-two young female patients with EDs, including 28 patients with AN and 64 patients with BN, and 38 normal controls were enrolled.Cognitive flexibility was assessed with percentage of persistent errors (PPE) and percentage of persistent responses (PPR) of the Wisconsin Card Sorting Test (WCST）,and clinical features of ED by using the Eating Disorder Inventory-1 (EDI-1）.Results:The PPE[ (5.0±4.7) % vs. (2.8±2.8) %,P <0.01] and PPR[ (11.7±7.8) % vs. (6.4±5.9) %,P <0.001] were higher in ED group than in normal control group, but the differences on PPE[ (5.5±5.4) % vs. (5.0±4.5) %,P> 0.05] and PPR[ (11.2±7.8) % vs. (11.1±7.3）%,P> 0.05] between AN and BN groups were not statistically significant. The PPE (r=0.21,P <0.05) and PPR (r=0.27,P <0.01) were positively correlated with the EDI-1 total scores.PPR was positively correlated with the frequency of appetite suppressant use (r=0.28,P <0.05) and skipping several meals (r=0.30,P <0.01) in the ED group. Conclusion: The presence of cognitive flexibility deficits in young female patients with eating disorders, and their correlation with clinical features of eating disorders further support the possibility of being an endophenotype of eating disorders. [ABSTRACT FROM AUTHOR]

This paper investigated the issue of covert network attacks on video surveillance systems in light of their networking and intelligent development, which brought about new risks. The primary objective of this research was to explore numerous cases of covert network attacks and summarize the specific characteristics of such attacks targeting video surveillance systems. Additionally, this paper examined the unique advantages of honeypot technology in detecting network attack behaviors and identifying attack clues, and outlined the honeypot defense methods against covert attacks on video surveillance systems. Furthermore, considering the shortcomings in the visual scene deployment of video surveillance honeypots, this paper introduced a deep scene fabrication defense framework that combined generative Al models with video surveillance honeypots. Finally, it proposed the development direction of honeypot defense technology for video surveillance systems. [ABSTRACT FROM AUTHOR]

A field plot experiment was conducted to study the loss of organic carbon, the distribution of soil organic matter, and their effects on soil heavy metal content and rice yield under the same amount of organic carbon input of different organic materials (CK, chicken manure T1, sheep manure T2, mushroom residue T3, and biological humic acid T4) in mudflat saline alkali land. The results showed that after applying different organic materials to the soil, the organic carbon loss rates of T1, T2, T3, and T4were 64.52%,58.69%,47.04%, and 29.56%, respectively; the undisturbed portion was converted into soil organic matter. Although the T3, treatment had a lower organic carbon loss rate, the proportion of active organic matter in the soil was lower than other treatments.T3, and T4, could reduce the content of available mercury, arsenic, cadmium, lead and chromium in mudflat saline alkali soil, of which T4, was the best.T1, and T2, treatments could reduce the content of available mercury, cadmium and chromium, but to a certain extent, they could increase the content of available arsenic and available lead respectively.T1, -T4, significantly increased the effective panicle and grain number of rice, with an increase of 10.17%, 14.03%,6.65% and 24.52% compared to the control, respectively. Among them, T4, significantly increased the grain number of rice panicles. It could be seen that in the comprehensive improvement and utilization of mudflat saline alkali land, biological humic acid had significant advantages in terms of organic carbon loss rate, increasing soil active organic matter, reducing soil heavy metal content and improving rice yield, and was an excellent organic material input for the improvement of mudflat saline alkali land.. [ABSTRACT FROM AUTHOR]

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