Subjects: Medicine, Pharmacy >> Clinical Medicine submitted time 2025-03-07 Cooperative journals: 《中国全科医学》
DUAN Ruolan
QIU Jiamei
YANG Changyuan
LI Qin
MO Haoyu
PI Minhui
YANG Zhenhua
XIA Ai
ZHANG La
LIU Xusheng
LU Fuhua
HOU Haijing
SU Guobin
Abstract： Background Fatigue is prevalent in patients with chronic kidney disease（CKD）and closely associated with reduced quality of life and increased mortality. Currently，Patient-Reported Outcome Measures（PROMs）are commonly employed to assess fatigue. However，these measures exhibit variations in format. There is no consensus about how to choose an appropriate one to use in clinical practice. Objective Systematically assess the advantages, disadvantages, and target populations of various scales to provide clinical practitioners with a reference for choosing appropriate assessment tools. Methods A systematic search of database like PubMed, Web of Science, CNKI, VIP, and Wanfang Data was conducted for literatures about fatigue assessment in patients with CKD, from January 2018 to April 2024. The data were independently screened and extracted by two researchers, and by comparing the assessment methods, advantages and disadvantages of each scale to inform the choice of fatigue assessment scales in different CKD populations. Results The study reveals that CKD-related fatigue scales can be categorized into general fatigue scales and specific population fatigue scale. All these scales employ Likert scale for fatigue assessment. We found that health status survey instruments and the Dialysis Symptom Index Scale（DSI）were suitable for screening fatigue symptoms in CKD；the Piper Fatigue Scale-Revised（PFS-R）with multidimensional scale was the most commonly used in clinical practice and a promising scale for the assessment of fatigue in CKD because it could clearly differentiate between the degree and dimensions of fatigue. Conclusion There are many fatigue scales to assess fatigue for patients with CKD. Clinical practitioners should consider the characteristics of the CKD study population comprehensively and choose the appropriate scale for fatigue assessment.
Subjects: Agriculture, Forestry,Livestock & Aquatic Products Science >> Other Disciplines of Agriculture, Forestry,Livestock & Aquatic Products Science submitted time 2024-08-30 Cooperative journals: 《智慧农业（中英文）》
Abstract： [Significance] The beef cattle industry plays a pivotal role in the development of China’s agricultural economy and the enhancement of people’s dietary structure. However, there exists a substantial disparity in feeding management practices and economic efficiency of beef cattle industry compared to developed countries. While the beef cattle industry in China is progressing towards intensive, modern, and large-scale development, it encounters challenges such as labor shortage and rising labor costs that seriously affect its healthy development. The determination of animal physiological indicators plays an important role in monitoring animal welfare and health status. Therefore, leveraging data collected from various sensors as well as technologies like machine learning, data mining, and modeling analysis enables automatic acquisition of meaningful information on beef cattle physiological indicators for intelligent management of beef cattle. In this paper, the intelligent monitoring technology of physiological indicators in beef cattle breeding process and its application value are systematically summarized, and the existing challenges and future prospects of intelligent beef cattle breeding process in China are prospected. [Progress] The methods of obtaining information on beef cattle physiological indicators include contact sensors worn on the body and non-contact sensors based on various image acquisitions. Monitoring the exercise behavior of beef cattle plays a crucial role in disease prevention, reproduction monitoring, and status assessment. The three-axis accelerometer sensor, which tracks the amount of time that beef cattle spend on lying, walking, and standing, is a widely used technique for tracking the movement behavior of beef cattle. Through machine vision analysis, individual recognition of beef cattle and identification of standing, lying down, and straddling movements can also be achieved, with the characteristics of non-contact, stress-free, low cost, and generating high data volume. Body temperature in beef cattle is associated with estrus, calving, and overall health. Sensors for monitoring body temperature include rumen temperature sensors and rectal temperature sensors, but there are issues with their inconvenience. Infrared temperature measurement technology can be utilized to detect beef cattle with abnormal temperatures by monitoring eye and ear root temperatures, although the accuracy of the results may be influenced by environmental temperature and monitoring distance, necessitating calibration. Heart rate and respiratory rate in beef cattle are linked to animal diseases, stress, and pest attacks. Monitoring heart rate can be accomplished through photoelectric volume pulse wave measurement and monitoring changes in arterial blood flow using infrared emitters and receivers. Respiratory rate monitoring can be achieved by identifying different nostril temperatures during inhalation and exhalation using thermal infrared imaging technology. The ruminating behavior of beef cattle is associated with health and feed nutrition. Currently, the primary tools used to detect rumination behavior are pressure sensors and three-axis accelerometer sensors positioned at various head positions. Rumen acidosis is a major disease in the rapid fattening process of beef cattle, however, due to limitations in battery life and electrode usage, real-time pH monitoring sensors placed in the rumen are still not widely utilized. Changes in animal physiology, growth, and health can result in alterations in specific components within body fluids. Therefore, monitoring body fluids or surrounding gases through biosensors can be employed to monitor the physiological status of beef cattle. By processing and analyzing the physiological information of beef cattle, indicators such as estrus, calving, feeding, drinking, health conditions, and stress levels can be monitored. This will contribute to the intelligent development of the beef cattle industry and enhance management efficiency. While there has been some progress made in developing technology for monitoring physiological indicators of beef cattle, there are still some challenges that need to be addressed. Contact sensors consume more energy which affects their lifespan. Various sensors are susceptible to environmental interference which affects measurement accuracy. Additionally, due to a wide variety of beef cattle breeds, it is difficult to establish a model database for monitoring physiological indicators under different feeding conditions, breeding stages, and breeds. Furthermore, the installation cost of various intelligent monitoring devices is relatively high, which also limits its utilization coverage. [Conclusion and Prospects] The application of intelligent monitoring technology for beef cattle physiological indicators is highly significance in enhancing the management level of beef cattle feeding. Intelligent monitoring systems and devices are utilized to acquire physiological behavior data, which are then analyzed using corresponding data models or classified through deep learning techniques to promptly monitor subtle changes in physiological indicators. This enables timely detection of sick, estrus, and calving cattle, facilitating prompt measures by production managers, reducing personnel workload, and improving efficiency. The future development of physiological indicators monitoring technologies in beef cattle primarily focuses on the following three aspects: (1) Enhancing the lifespan of contact sensors by reducing energy consumption, decreasing data transmission frequency, and improving battery life. (2) Integrating and analyzing various monitoring data from multiple perspectives to enhance the accuracy and utility value. (3) Strengthening research on non-contact, high-precision and automated analysis technologies to promote the precise and intelligent development within the beef cattle industry.
Subjects: Mechanics >> Hydromechanics submitted time 2024-06-17 Cooperative journals: 《应用力学学报》
Abstract：
The control rod falling law and falling time of passive shutdown in sodium cooled fast reactor are important parameters for control rod design,and they are typical hydrodynamic problems.In order to explain the swing and impact phenomena of control rod assembly in sodium cooled fast reactor during rod drop test,the falling process of control rod is simulated and studied by using the dynamic grid method of simulation software,the factors influencing the falling law of control rod are analyzed,and the method of buffering the falling speed of control rod is proposed.The error between the test results and the numerical simulation results is 2.44%.The main conclusions are as follows:the simulation results show that there are shaking and eccentricity phenomena in the process of control rod falling,and the shaking amplitude can be reduced by reducing the center of gravity of the control rod.The initial eccentricity and falling eccentricity of control rod have little effect on the overall falling time.The small hole at the bottom of the buffer cup does not affect the buffer effect,and the serrated groove structure on the surface of the buffer cup can effectively improve the buffer effect.The cushioning effect of serrated groove is 47.2% higher than that of rectangular groove.
Subjects: Psychology >> Social Psychology submitted time 2024-05-12
Abstract： Consumer guilt refers to negative feelings caused by consumer’s behavior that violates social norms or individual values. Consumer guilt exists universally in college students who are not economically independent yet but have a strong willingness to consume. However, few studies have systematically examined what caused consumer guilt in college students. Related research showed that people with different socioeconomic status (SES) had different psychological experience during consuming. Therefore, the level of consumer guilt may vary in college students with different SES. College students’ parents bring them up and also provide them financial support. As main factors of parent-child relationship, Parenting styles and parent-child communication probably moderate the relationship between SES and consumer guilt. Materialism is a value emphasizing the importance of material wealth in individual life. Individuals with high materialism are more likely to engage in irrational consumption, which leads to consumer guilt. That means different level of materialism probably influences the relationship between SES and consumer guilt. Therefore, the current study aims to explore the relationship between SES and consumer guilt. Furthermore, the current study also explores the moderating effects of parenting styles, parent-child communication, and materialism on the relationship between SES and consumer guilt. The current study recruited 560 college students online, who were from different Chinese universities(Mage = 20.94±1.99 years, 266 females). 560 participants completed questionnaires on anticipated and reactive consumer guilt, objective and subjective socioeconomic status, parenting styles, parent-child communication, and materialism. SPSS 26.0 and PROCESS 4.1 were used to analyze data. The results showed that:(1) Objective SES significantly negatively predicted both anticipated consumer guilt and reactive consumer guilt, but subjective SES had no significant effect on anticipated and reactive consumer guilt. (2) Parenting styles and parent-child communication moderated the relationship between objective SES and consumer guilt. When parenting styles(high parents’ emotional warmth、low parents’ rejection and low father’s over protection) and parent-child communication (high conversation、low conformity) were positive, objective SES could significantly negatively predict consumer guilt; when parenting styles and parent-child communication were negative, objective SES had no significant effect on consumer guilt. (3) Materialism had no significant moderating effect on the relationship between objective SES and consumer guilt. The results indicate that objective SES may influence college students’ consumer guilt, and the protective role of family factors on the influence is more reflected in high objective SES college students.
Peer Review Status:
Awaiting Review
Subjects: Statistics >> Social Statistics submitted time 2023-12-04 Cooperative journals: 《智慧农业（中英文）》
Abstract： Objective Chlorophyll fluorescence (ChlF) emission from photosystem II (PSII) is closely coupled with photochemical reactions. As an efficient and non-destructive means of obtaining plant photosynthesis efficiency and physiological state information, the collection of fluorescence signals is often used in many fields such as plant physiological research, smart agricultural information sensing, etc. Chlorophyll fluorescence imaging systems, which is the experimental device for collecting the fluorescence signal, have difficulties in application due to their high price and complex structure. In order to solve the issues, this paper investigates and constructs a low-cost chlorophyll fluorescence imaging system based on a micro complementary metal oxide semiconductor (CMOS) camera and a smartphone, and carries out experimental verifications and applications on it. Method The chlorophyll fluorescence imaging system is mainly composed of three parts: excitation light, CMOS camera and its control circuit, and a upper computer based on a smartphone. The light source of the excitation light group is based on the principle and characteristics of chlorophyll fluorescence, and uses a blue light source of 460 nm band to achieve the best fluorescence excitation effect. In terms of structure, the principle of integrating sphere was borrowed, the bowl-shaped light source structure was adopted, and the design of the LED surface light source was used to meet the requirements of chlorophyll fluorescence signal measurement for the uniformity of the excitation light field. For the adjustment of light source intensity, the control scheme of pulse width modulation was adopted, which could realize sequential control of different intensities of excitation light. Through the simulation analysis of the light field, the light intensity and distribution characteristics of the light field were stuidied, and the calibration of the excitation light group was completed according to the simulation results. The OV5640 micro CMOS camera was used to collect fluorescence images. Combined with the imaging principle of the CMOS camera, the fluorescence imaging intensity of the CMOS camera was calculated, and its ability to collect chlorophyll fluorescence was analyzed and discussed. The control circuit of the CMOS camera uses an STM32 microcontroller as the microcontroller unit, and completes the data communication between the synchronous light group control circuit and the smartphone through the RS232 to TTL serial communication module and the full-speed universal serial bus, respectively. The smartphone upper computer software is the operating software of the chlorophyll fluorescence imaging system user terminal and the overall control program for fluorescence image acquisition. The overall workflow could be summarized as the user sets the relevant excitation light parameters and camera shooting instructions in the upper computer as needed, sends the instructions to the control circuit through the universal serial bus and serial port, and completes the control of excitation light and CMOS camera image acquisition. After the chlorophyll fluorescence image collection was completed, the data would be sent back to the smart phone or server for analysis, processing, storage, and display. In order to verify the design of the proposed scheme, a prototype of the chlorophyll fluorescence imaging system based on this scheme was made for experimental verification. Firstly, the uniformity of the light field was measured on the excitation light to test the actual performance of the excitation light designed in this article. On this basis, a chlorophyll fluorescence imaging experiment under continuous light excitation and modulated pulse light protocols was completed. Through the analysis and processing of the experimental results and comparison with mainstream chlorophyll fluorometers, the fluorescence imaging capabilities and low-cost advantages of this chlorophyll fluorometer were further verified. Results and Discussions The maximum excitation light intensity of the chlorophyll fluorescence imaging system designed in this article was 6250 μmol/(m2·s). Through the simulation analysis of the light field and the calculation and analysis of the fluorescence imaging intensity of the CMOS camera, the feasibility of collecting chlorophyll fluorescence images by the OV5640 micro CMOS camera was demonstrated, which provided a basis for the specific design and implementation of the fluorometer. In terms of hardware circuits, it made full use of the software and hardware advantages of smartphones, and only consisted of the control circuits of the excitation light and CMOS camera and the corresponding communication modules to complete the fluorescence image collection work, simplifying the circuit structure and reducing hardware costs to the greatest extent. The final fluorescence instrument achieved a collection resolution of 5 million pixels, a spectral range of 400~1000 nm, and a stable acquisition frequency of up to 42 f/s. Experimental results showed that the measured data was consistent with theoretical analysis and simulation, which could meet the requirements of fluorescence detection. The instrument was capable of collecting images of chlorophyll fluorescence under continuous light excitation or the protocol of modulated pulsed light. The acquired chlorophyll fluorescence images could reflect the two-dimensional heterogeneity of leaves and could effectively distinguish the photosynthetic characteristics of different leaves. Typical chlorophyll fluorescence parameter images of Fv/Fm, Rfd, etc. were in line with expectations. Compared with the existing chlorophyll fluorescence imaging system, the chlorophyll fluorescence imaging system designed in this article has obvious cost advantages while realizing the rapid detection function of chlorophyll fluorescence. Conclusions The instrument is with a simple structure and low cost, and has good application value for the detection of plant physiology and environmental changes. The system is useful for developing other fluorescence instruments.
Subjects: Other Disciplines >> Synthetic discipline submitted time 2023-11-07 Cooperative journals: 《文献与数据学报》
Abstract： ［Purpose/significance］Since the 18th National Congress of the Communist Party of China（CPC）, the policy environment of the publishing industry has changed considerably, and academic publishing is facing new opportunities and challenges, and “high-quality development” will be “the main theme” of the future development of academic publishing. ［Method/process］ Based on the bibliometric analysis, this paper takes the academic publication funding system as the observation perspective, selects the publication funding projects-establishment by government departments, research institutions and publishers as cases, analyzes the academic evaluation function, differentiated incentive function and market operation function of the three types of projects, and explores the path to improve the quality of academic publishing.［Result/conclusion］ At the macro level, it is necessary to further play the leading and demonstration role of government departments leading the national publication funding programs; at the meso level, research institutions leading the establishment of academic publication funding programs with unit or regional attributes to achieve differentiated incentives; and at the micro level, publishers are early and pilot in the academic publication standardization and market-oriented operation, and create academic publication brands.
Subjects: Digital Publishing >> New Media submitted time 2023-10-08 Cooperative journals: 《中国传媒科技》
Abstract：智慧政务融媒体平台可以提升政府政务服务水平和业务办理能力，本文提出了智慧政务融媒体平台构建及消防监管的应用。通过设计智慧政务融媒体服务器和政务数据安全性能管理器，完成平台硬件设计，通过解析智慧政务流程和建立智慧政务融媒体资源库，完成平台的软件设计，实现智慧政务融媒体平台的构建。测试结果表明，文中平台的功能符合设计标准，通过降低CPU使用率、提高内存空闲率，满足平台的性能设计标准。通过优化政府监管方式和形成整体性监管格局，给出智慧政务融媒体平台在消防监管中的应用措施，从而提升政府政务服务水平和业务办理能力。
Subjects: Digital Publishing >> New Media submitted time 2023-10-08 Cooperative journals: 《中国传媒科技》
Abstract：随着"三网"融合趋势的不断加深,市场竞争越来越激烈,对技术发展的需求也愈发严格,我们不能停留在广电网络传统的有线电视业务模式中,而目前最佳的解决方式唯有双向改造。在此基础上,本文简要概括了EOC技术及其在广电网络双向改造中的应用,同时提出相应的网改对策,以期对广电网络全网的双向综合业务、双向用户接入的发展起到正面影响,内容仅供参考。
Subjects: Digital Publishing >> New Media submitted time 2023-10-08 Cooperative journals: 《中国传媒科技》
Abstract：移动网络技术的高速发展,使我们进入了大数据时代,并且使各行业发生了巨大的变革。新闻编辑工作是深受大数据影响的一个领域,与传统新闻编辑不同的是,数据新闻编辑在产品形态、发行渠道等方面都发生了很大的改变。基于此,本文在分析新时期数据新闻编辑变化的基础上,对重构新闻编辑能力提出了几点建议,旨在提高新闻编辑能力,为人们提供高质量的新闻内容。
Subjects: Mechanics >> Basic Mechanics submitted time 2023-04-24 Cooperative journals: 《应用力学学报》
Abstract： In water transportation projects,due to the constraints of topography and geology,bifurcated pipelines have been widely promoted and applied.The leakage of bifurcated water pipelines is an important issue of great concern to scholars at home and abroad,and the transient flow method is one of the most efficient,accurate and fast leak detection methods at present.Based on this,this paper constructs a transient flow model of water pipeline with bifurcation structure,and explores the influence of different factors on the pressure change at the end of the valve.The factors affecting the pressure change at the end of the valve were investigated.The results show that the difference of pressure curve increases with the increase of the length of bifurcation pipe,the attenuation rate of pressure curve decreases with the increase of valve closing time,and the leakage has little influence on the variation period of pressure curve.The leakage position is different,the shape of the pressure curve at the amplitude is different.When the leakage position is in the upper half of the pipeline,the curve will be convex at the amplitude,and when it is in the lower half of the pipeline,the curve will be concave at the amplitude trend.
Subjects: Psychology >> Developmental Psychology submitted time 2023-03-28 Cooperative journals: 《心理科学进展》
Abstract： Automated driving can largely reduce modern traffic problems and improve driving comfort. During conditional automated driving (Level 3), drivers are allowed to engage in non-driving related tasks but need to take over the vehicle timely once the system reached its limitation. In this critical process, drivers have to shift their attention and acquire situational awareness in order to take over successfully. Existing studies have shown that take-over requests, non-driving related tasks, driving situations and driver-related factors were all critical factors in the take-over process. In the future, we can investigate the cognitive mechanism of the influence of various factors on the take-over process and explore possible interactions between these factors.
Subjects: Psychology >> Social Psychology submitted time 2023-03-28 Cooperative journals: 《心理科学进展》
Abstract： Virtual reality creates an immersive experience for users by providing visual, auditory, and tactile information. However, tactile feedback still faces many technical bottlenecks, which limit natural interaction in the virtual reality environment. Pseudo-haptic technology based on multi-sensory illusion can enhance and enrich tactile perception with the help of information from other channels, which is one of the effective ways to optimize tactile perception in the virtual reality environment. In order to explore the problem in a more targeted way, the study focuses on roughness perception among different dimensions of tactile perception. We first discuss the relationship between visual, auditory, and tactile perception in roughness information integration and further analyze visual and auditory factors affecting roughness perception. In the process of roughness perception, the channel with less noise and more reliable information will have a higher weight. By evaluating the roughness under every single channel (visual、auditory and tactile) condition,and each double-channel（visual-tactile and auditory-tactile) condition, previous studies have quantified the high weight of visual and auditory channels in roughness perception. It further verifies that roughness perception results from integrating tactile, visual, and auditory information. Therefore, it has excellent potential to manipulate visual and auditory factors to induce or enhance roughness perception in the virtual reality environment. For visual factors, the texture of the surface, light or shadow, and the control display rate (CDR) may affect the perception of roughness. ①When the texture density of the object surface increase, the perceived roughness will increase accordingly; ②Since the angle of incidence influence the shadow of the surface texture, thus affecting the perception of roughness; ③ When the glossiness of surface decrease, the perceived roughness increase; ④Reducing the CDR of the virtual hand or presenting a vibratory virtual hand will increase the user's perception of the roughness. For auditory factors, manipulating loudness and pitch/frequency can change the roughness perception: increasing loudness in the entire frequency of sound or increasing loudness in a high, medium, or low frequency band of sound can improve the roughness perception. There is a strong correlation between pitch/frequency and roughness perception. According to current research, we speculated that there might be an inverted U-shaped curve between pitch/frequency change and roughness perception. In the future, in order to optimize the tactile roughness experience in virtual reality environment, studies can be carried out from the following aspects: Firstly, it is necessary to explore the differences between every single channel (visual, auditory, and tactile) information in the virtual reality environment and real environment respectively, since single channel information is the prerequisite for multi-sensory channel information in the virtual reality environment. Secondly, from the practical point of view, we can choose the channel more suitable to the current scene or task and provide sufficient information timely with emphasis. Thirdly, the difference of single-channel information in virtual reality will lead to information mismatch between different channels. Therefore, it is necessary to explore further how the brain integrates the originally different and mismatched multi-channel sensory information. Finally, most studies explored the usability of relevant sensory information on roughness perception from the perspective of single-channels or double-channels. Therefore, in the future, it is of significant importance to explore the information integration and processing rules of three channels in virtual reality.
Subjects: Medicine, Pharmacy >> Clinical Medicine submitted time 2022-08-17 Cooperative journals: 《中国全科医学》
Abstract： General practice research often pays attention not only to the physical health of patients, professional competence of doctors, and the quality of medical services, but also to the spiritual feelings of patients, motivation of doctors to practice, and the cooperation between doctors and patients. However, these are not resolved well only using quantitative research which is still dominated in the field of general practice. Mixed methods research which integrates qualitative and quantitative research, combining the advantages of both, can analyze specific problems more broadly and in depth, and increase the generalizability of research results, which is suitable for studying complex problems. However, the application of mixed methods research in general practice is still limited in China, and the standardization of its design and implementation needs to be improved. Therefore, this paper plans to introduce the key points in the design and implementation of mixed methods research from methodological lence, combining theory with practice, so as to provide reference for general practitioners who intend to carry out mixed methods research.
Subjects: Psychology >> Industrial Psychology submitted time 2021-10-28
Abstract： Virtual reality creates an immersive experience for users by providing visual, auditory, and tactile information. However, tactile feedback still faces many technical bottlenecks, which limit natural interaction in the virtual reality environment. Pseudo-haptic technology based on multi-sensory illusion can enhance and enrich tactile perception with the help of information from other channels, which is one of the effective ways to optimize tactile perception in the virtual reality environment. In order to explore the problem in a more targeted way, the study focuses on roughness perception among different dimensions of tactile perception. We discuss the multi-sensory channel integration of visual, auditory, and tactile in roughness perception, then analyze how the visual cues (density of surface texture, light and shadow, control display rate) and auditory cues (pitch/frequency, loudness) affect roughness perception, moreover, summarize the methods of changing roughness perception by manipulating these cues. Finally, we discuss the differences of visual, auditory, and tactile information between virtual reality environment and real-world in representation and perceptual integration when using pseudo-haptic feedback technology, proposing practical solutions and future research directions to improve the tactile experience. " "
Peer Review Status:Awaiting Review
Subjects: Geosciences >> Geography submitted time 2021-10-10 Cooperative journals: 《干旱区地理》
Abstract： 阿克苏河流域作为西北干旱区内陆河，生态环境极为脆弱，研究其生态安全格局对优化区 域国土空间开发保护格局，推动生产生活方式向绿色转型，促进人与自然和谐共生具有重要战略 意义。基于研究区本底特征，运用空间主成分分析法（SPCA）对阿克苏河流域 1980—2018 年生态 承载力时空演变进行评估监测，利用最小累积阻力（MCR）模型提取生态廊道及生态节点，构建生 态安全格局。研究表明：（1）阿克苏河流域生态承载力空间差异明显，以中等承载为主，生态承载 优势区呈现由中东部向西部转移趋势。（2）阿克苏河流域生态承载力呈增长趋势。近 40 a 阿克苏 河流域整体生态承载力呈上升趋势，强承载区面积不断增加，弱承载区面积呈现波动下降趋势，表 明流域环境有所改善。（3）生态源地占整体面积较少，分布较为集中。根据生态承载力评估结果， 提取生态源地 23465.21 km2，约占研究区面积的 35.61%。生态源地集中分布于流域中部地区，北部 高山地区与西南部盆地、沙漠地区分布较少。（4）利用 MCR 模型及遥感影像，将阿克苏河流域划分 为 16 个生态安全格局分区，提取生态廊道 67 条，识别生态节点 71 处，并结合生态承载力评估结果， 对流域生态空间结构提出优化建议。
Subjects: Computer Science >> Integration Theory of Computer Science submitted time 2020-09-28 Cooperative journals: 《计算机应用研究》
Abstract： This paper proposed a multiscale feature fusion approach for malicious HTTP request detection. Firstly, it models the HTTP request in both word-level and character-level. Secondly, it extracts the high level sematic information in HTTP request by using a specially designed convolutional neural network (CNN) . Thirdly, it jointly learns the multiscale representation for HTTP request with the help of multimodal learning techniques. Finally, a linear classifier is adopted for classification. Extensive experiments conducted on public HTTP CSIC 2010 dataset and WAF dataset show large improvement on the performance against existing state-of-the-art methods.
Subjects: Environmental Sciences, Resource Sciences >> Basic Disciplines of Environmental Science and Technology submitted time 2020-06-09 Cooperative journals: 《干旱区研究》
Abstract：通过对柴达木盆地124个样点的表土孢粉分析和植被样方调查，研究了盆地表土孢粉与植被的对应关系。结果表明：柴达木盆地的表土孢粉组合能较好地反应当地植被特征，但是在具体的科属组成上有差异。藜科、蒿属、麻黄属等花粉R值大于1，具有超代表性；柽柳属、菊科等花粉R值小于1，具有低代表性，但对植被具有一定指示意义；禾本科和白刺属花粉在大多数样点具有低代表性，但禾本科花粉在建群种样点、白刺属花粉在盐碱区都具有适中代表性。主要科属花粉百分比与植被盖度之间具有一定相关性，禾本科、莎草科、菊科、柽柳属的相关性较高，可以建立相应函数关系。盆地西部的无植被区仍有相当含量的花粉，主要为藜科、蒿属、麻黄属、松属等超代表性花粉。盆地蒿属与藜科花粉比值（A/C）呈东南-西北递减趋势，与盆地由东南-西北逐渐干旱的环境特点很好对应。主要草灌木表土花粉数据的主成分分析表明，该区花粉组合主要受水文和土壤盐碱度等因素控制。
Subjects: Geosciences >> Other Disciplines of Geosciences submitted time 2019-09-11 Cooperative journals: 《干旱区地理》
Abstract：新疆夏尔希里自然保护区保持着较为原始的生态环境，是研究植被与环境变化的理想区域。通过在保护区内从海拔1 042~2 426 m的山地草原化荒漠带、山地干草原带和山地森林带采集的33个表土孢粉样品，结合对每个样点做的植被样方调查，根据孢粉数据进行有序聚类分析和冗余分析，探讨了表土孢粉组合特征与植被之间的对应关系。结果表明：3个孢粉组合带的特征与各垂直带植被总体上有较好的对应；藜科和麻黄属花粉含量与样方植物盖度无明显相关性，这两类孢粉呈现超代表性分布特征，应该是随气流从低海拔地带传播到山地高海拔地带的区域外花粉；桦属花粉和豆科花粉与对应的桦木林及锦鸡儿灌丛植被群落有较好的对应；[WTBX]A/C[WTBZ]比值和孢粉总浓度大小在区分森林带与草原化荒漠植被带时有明显的指示意义；蕨类植物孢子与降水量和海拔高度正相关，豆科植物花粉与温度正相关。由于山地地形因素引起的土壤、水分及光照度差异，在相同海拔高度的阳坡与阴坡形成的森林植被和中山草甸植被交替的过渡植被，因此孢粉组合中出现较多的花粉混合，进而降低了云杉和桦属花粉与植被盖度的相关性，这类木本花粉与植被之间的数量关系较为复杂。该现象在植物生态学分析中具有普遍性，但对表土孢粉数据在植被与气候定量重建中的应用具有较大的影响。在运用山地表土孢粉数据进行植被与气候定量重建时，需要结合植被样方资料和沉积环境特征对表土孢粉数据进行校正和筛选。
Subjects: Psychology >> Applied Psychology submitted time 2019-08-23
Abstract： Automated driving can largely reduce modern traffic problems and improve driving comfort. During conditional automated driving (Level 3), drivers are allowed to engage in non-driving related tasks but need to take over the vehicle timely once the system reached its limitation. In this critical process, drivers have to shift their attention and acquire situational awareness in order to take over successfully. Existing studies have shown that take-over requests, non-driving related tasks, driving situations, and driver-related factors were all critical factors in the take-over process. In the future, we can investigate the cognitive mechanism of the influence of various factors on the take-over process and explore possible interactions between these factors."
Subjects: Computer Science >> Integration Theory of Computer Science submitted time 2019-05-10 Cooperative journals: 《计算机应用研究》
Abstract： For text matching problems in natural language processing, this paper proposed a deep learning model based on self-adaptive affinity graph learning framework for short text matching. The affinity graph can be converted into a vector form using word embedding, and then obtained by constructing a text similarity relationship matrix, which can express the neighbor relationship of the text sample. Current methods usually construct static affinity graphs, which rely on prior knowledge and hard to obtain the optimal representation of sentence pairs. Therefore, this paper proposed to use the Siamese CNN to learn the affinity graph of better dynamic updates. The accuracy and F1 values of the model on the Quora dataset are 84.15% and 79.88%, respectively, and the accuracy and F1 values on the MSRP dataset are 74.55% and 81.63%, respectively. Experiments show that the proposed model can improve the accuracy of text recognition and matching effectively.
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