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The middle and upper reaches of the Han river are involved in the South-to-North Water Diversion Project, and the change of runoff affects the amount of adjustable water. In order to investigate the change of runoff in the middle and upper reaches of the Han river basin under climate change, based on the SWAT (Soil & Water Assessment Tool, SWAT) model, we have developed a new model, which is based on the Soil & Water Assessment Tool (SWAT), five global climate models and four Shared Socioeconomic Pathways (SSPs) scenarios are simulated under future climate scenarios (2021-2021) in the upper and middle reaches of the Han river Basin. Based on the SWAT (Soil & Water Assessment Tool) model, we applied five global climate models and four Shared Socioeconomic Pathways (SSPs) scenarios from the latest 6th Coupled Model Intercomparison Project Phase 6 (CMIP6), and simulated the temporal and spatial changes of runoff in the middle and upper reaches of the Han river basin in the near term (2021-2040), middle term (2041-2060), and long term (2061-2080) under the future changes of climate scenarios. The results showed that: (1) compared with the baseline period (2000-2014), rainfall and temperature increased significantly under all model scenarios, and under the "two-carbon" scenario, the increase in temperature and precipitation was smaller than that of the high-carbon scenario, and the watershed was developing towards wetting and warming. (2) The future runoff in the study area showed a significant increasing trend under the SSP2-4.5 and SSP5-8.5 pathways, relative to the historical period, and the runoff decreased in some years in the upstream near, middle and far periods. 8.5 pathways show a significant increasing trend, relative to the historical period, and runoff decreases in some years in the upstream near-, mid-, and far-periods. (3) Intra-annual distribution was more even, and runoff increased during the dry period from November to June of the following year, which improved the drought-resistant capacity of the basin. (4) Spatially, the increase in runoff was dominated by the central and eastern parts of the country, and runoff decreased under the high-carbon scenario in the near future, but showed an increasing trend in the long term, with an increasing trend in future runoff at the source area of the South-to-North Water Diversion Project. [ABSTRACT FROM AUTHOR]

Objective To investigate the expression of WD repeat-containing protein 5 (WDR5) in cervical cancer tissue and its relationship with clinical pathological characteristics and prognosis of patients. Methods 105 CA patients admitted to our hospital from January 2018 to March 2020 were included as the study subjects, the cancer tissue and adjacent tissue samples of patients were collected, Immunohistochemical staining and Western blot were used to detect the level of WDR5 in CA tissue and adjacent cancer tissues. Immunohistochemistry and Western blot were used to determine the level; Survival analysis was conducted using the Kaplan Meier method; The influencing factors of patient prognosis were analyzed through Cox regression. Results Among 105 CA tissue samples, the positive expression rate of WDR5 (WDR5 positive cases/total cancer tissue cases) was 68.57% (72/105, which was higher than 22.86% (24/105) in adjacent cancer tissues (P < 0.05) ; Compared to adjacent tissues (1.00 ± 0.11, the expression level of WDR5 was higher in CA tissues (4.66 ± 0.98) (t = 38.030, P < 0.05 ). The expression level of WDR5 is related to the degree of differentiation, TNM staging, and lymph node metastasis (P < 0.05 ; The survival rate of WDR5 positive expression was 65.28% (47/72) lower than that of negative expression of 90.91% (30/33) (Log rank χ² = 6.732, P = 0.009) ; TNM staging, WDR5, degree of differentiation, and lymph node metastasis are all influencing factors for patient prognosis (P < 0.05 ). Conclusion The expression of WDR5 is elevated in cervical cancer tissues, and its changes are closely related to TNM staging, differentiation, lymph node metastasis, and prognosis in cervical cancer patients. [ABSTRACT FROM AUTHOR]

Blue-green water evaluation can provide scientific suggestion for the comprehensive management of water resources in the basin. Here Wujiang river basin was as an example, based on the SWAT (Soil and Water Assessment Tool) hydrological model, the annual runoff anomaly percentage method was used to determine different precipitation patterns. The Mann-Kendall trend method(M-K) and the linear regression trend analysis method were applied to evaluate the temporal and spatial characteristics of blue-green water resources from 1992 to 2019 and the differences in the distribution and spatial distribution of blue-green water in different precipitation years. The results showed that: (1) the simulation of the SWAT model was better, which describe the water cycle process in Wujiang river basin. (2) The annual average precipitation, blue water resources and green water resources in the basin were 1126mm, 549mm and 589mm, respectively. The precipitation and blue water resources generally showed a decrease trend, but the green water resources exhibited an increase trend. (3) The green water coefficient were 46%, 52% and 58% in the wet year, normal year and dry year, respectively. Thus, the amount of green water resources has changed and plays an important role in ecosystem maintenance. (4) From the upstream to the downstream of the basin, the precipitation and blue water resources increased first and then decreased, while the green water resources presented a trend of first increasing, then decreasing and finally increasing. (5) The temporal and spatial variation of blue water resources was mainly impacted by the change of precipitation, while that of green water resources was affected by the change of precipitation, temperature, and land use cover. [ABSTRACT FROM AUTHOR]

The access control of encrypted documents can be well realized by using attribute-based encryption schemes. But the attributes are static in all attribute-based encryption schemes, resulting in certain problems in practical applications. Based on conditions-based encryption, a dynamic attributebased encryption scheme is developed. The scheme allows one user to calculate his own attributes key in the scheme once he satisfies a certain attribute after the authenticating party＇s digital signature is given. The security of the scheme is discussed at last. [ABSTRACT FROM AUTHOR]

Solar power is the ideal use of solar energy. It is better to adopt tracking mode to track the sun automatically, and the solar receiver can get more solar energy for tracking system lets incident sunlight keep parallel to collector. The auto-tracking modes include program tracking mode, photoelectric tracking mode and hybrid tracking mode. Considering that program tracking mode has accumulative error although it can be all-weather tracking, and photoelectric sensor tracking has better tracking sensitivity and higher tracking precision only in the sunny day, solar auto-tracking system generally adopts hybrid tracking mode which is a combination of program tracking mode and photoelectric sensor tracking mode; for photoelectric sensor tracking mode eliminates accumulated error of program tracking mode, the system can achieve the goal of all-weather high-precision tracking. In this mode, photoelectric tracking mode uses light intensity detection information of photoelectric sensor to adjust the tracking system's position, so the design of photoelectric sensor's structure can directly affect solar auto-tracking system's tracking accuracy and running stability. At present, the most widely used types of photoelectric sensor are baffled type, pyramidal type, tube type, etc. Baffled type photoelectric sensor is vertically arranged on the base; making use of barrier, when there exists the included angle between barrier and incident light, light sensors on both sides will receive different light intensity, and then sun position can be determined. It has lower price and convenient installation with simple structure, but its motor rotates frequently and the system has lower tracking accuracy, for it is easily affected by external lights from different directions. Pyramidal type photoelectric sensor makes full use of cosine principle, and the light exposure to silicon photocell of the pyramid side, is equal to the area multiplied by incident light angle cosine. Even though its accuracy is higher than baffled type's, it is still influenced by environmental astigmatism. Tube type has higher tracking precision than others, but the solar incident angle and the height of the tube are conditioned by each other so that it causes the mutual influence between system's tracking stability and tracking precision. Photoelectric sensor, whose structural design has a great influence on the system's tracking accuracy and operational stability, is the detecting element of photoelectric tracking. In order to solve existing sensors' problems, such as single form, low tracking accuracy, bad stability, this paper designs a kind of photoelectric sensor, which is a combination of pyramidal type photoelectric sensor and box type photoelectric sensor, and can track accurately. The pyramid type photoelectric sensor is outside the box type and roughly tracks, while the box type accurately tracks. The concave-mirror, inside the box type, has reflection effect so that it can effectively reduce the box height of the sensor, and the box type and the pyramid type photoelectric sensor can be disassembled to work alone. LM324 comparator, as the core of the system, controls the motor to drive actuator to track sun in the circuit of the sensor. This paper then builds controller models and simulates by MATLAB/Simulink, and the fuzzy PID (proportional integration differentiation) control can let the tracking system return to steady state under disturbance. This control method can achieve optimal control, which means not only the simulation result is intuitional and believable, but also the method can greatly save the cost. The system can quickly return to steady state even in a case of interference, therefore, it has realized tracking feature without error, and also has proved that the fuzzy PID control method can maintain certain performance of the system, and the system has great robustness. Tracking system has better performance with the fuzzy PID controller. In addition, it is simple and continent with Simulink to establish the model and then simulate, and the simulation results are intuitively credible. Simulink can realize the different systems' real simulation better, and then get better simulation results. [ABSTRACT FROM AUTHOR]

This work investigated the design and conversion of a research-based comprehensive chemistry experiment in laboratory. The preparation and characterization of carboxylate vanadyl complex is a routine synthetic method in the scientific research on bio-inorganic chemistry. Through the study and optimization all the steps of the experiment which uses the aromatic carboxylic acid to react with the vanadium raw materials, the best experiment conditions, the most efective handling methods and the appropriate reaction time were obtained. The experiment could satisfy the requirements of the stability and reproducibility in teaching experiment. And the carboxylate vanadyl complex products were characterized by the infra-red spectrum (IR) and thermogravimetric analysis (TGA). Through this comprehensive experiment, the students could consolidate the principle of complex preparation, understand and grasp the working principle and operation skiil of the rotary evaporator, microwave oven, infrared spectroscopy and thermogravimetric analyzer, and develop their comprehensive ability including the related chemical basic knowledge, experimental operation, instrument analysis and relevant scientific literacy and research ability. [ABSTRACT FROM AUTHOR]