Subjects: Library Science，Information Science >> Library Science submitted time 2023-10-08 Cooperative journals: 《知识管理论坛》
Abstract： [Purpose/Significance] In the era of big science, exploring and identifying potential interdisciplinary knowledge combinations are conducive to promoting knowledge integration and innovation. [Method/Process] Based on the direct citation relationship, this paper analyzed the identification path of potential interdisciplinary knowledge combination, constructed the evaluation indicator models of fusion potential, and combined the grey relational analysis to carry out empirical analysis by taking the journal papers of library and information discipline as an example. [Result/Conclusion] Potential interdisciplinary knowledge combinations with greater integration possibility and novelty for library and information science are identified, which provide ideas and references for exploring the integration and innovation of knowledge between different disciplines.
Subjects: Library Science，Information Science >> Information Science submitted time 2023-04-01 Cooperative journals: 《图书情报工作》
Abstract： [Purpose/significance] This paper surveys the status of theory and practice of software citation, analyzes the existing difficulties and problems, and promotes the establishment of software citation norm and standard. [Method/process] Through the literature research, it’s found that software citation has faced four challenges: acceptance culture, reward system, citation cognition and metadata. Then this paper analyzed the exploration of theory and practice of software citation and its specification at home and abroad in order to meet the challenges. [Result/conclusion] Stakeholder analysis of software citation, theoretical exploration of software citation principles and metadata standards, citation guidelines of international research organizations and communities, support of related projects and databases, personnel training, implementation of contribution distribution and reward plan, and provision of software citation documents have laid a good foundation for the establishment of software citation norms, but the stakeholders still need work together to overcome the difficulties and challenges of software citation.
Subjects: Library Science，Information Science >> Information Science submitted time 2023-04-01 Cooperative journals: 《图书情报工作》
Abstract： [Purpose/Significance] As an important method for topic identification, co-word analysis has some limitations and deficiencies. The combination of weighted Word2Vec and co-word analysis is helpful to clarify the topic attribution of specific articles, and to better analyze the evolution of topics. [Method/Process] On the basis of topic clustering by co-word analysis, the article vectors and the clustering topic vectors were calculated by weighted Word2Vec, and the semantic matching between articles and topics was carried out based on cosine similarity. [Result/Conclusion] The empirical analysis in the field of knowledge sharing at home and abroad shows that this method can better match the relevant articles to the corresponding topics, and a dynamic analysis of the topic characteristic and evolution can be carried out from the article level.
Subjects: Psychology >> Social Psychology submitted time 2023-03-27 Cooperative journals: 《心理学报》
Abstract： Helping behaviors are critically important for human social development. However, most moral neuroscience studies have concentrated on immoral and negative behaviors such as killing, murder and harm. The neural mechanism of helpful intention processing in moral judgment is still unclear. Functional MRI studies have demonstrated the involvement of the right temporo-parietal junction (RTPJ) in the attribution of mental states. Previous studies have found that the role of intention processing in harmful moral judgment can be modulated by changing the cortical excitability of RTPJ with transcranial direct current stimulation (tDCS). Will the RTPJ play a critical role in the intention processing during moral judgment of helpful behavior? In order to explore the potential causal role of RTPJ in helpful moral judgement, the present study manipulates the cortical excitability of RTPJ with cathodal tDCS. We hypothesize that inhibiting the neural activity of RTPJ with cathodal tDCS could influence the role of intention processing in helpful moral judgment. To test the hypothesis, 18 healthy right-handed adults participated in this study. All participants underwent both cathodal and sham tDCS sessions in random order. Participants were counter-balanced in 2 separate days with a 1 week interval between both stimulations. To assure the target cortex to be activated completely, a relatively weak current (1.5 mA) was constantly delivered over the RTPJ for 20 min. For the sham tDCS, the stimulation only lasted for 15 sec. After stimulation, participants read stories in a 2 (intention: positive vs. neutral) × 2 (outcome: positive vs. neutral) design and were asked to make moral judgment about how much praise the actor deserves. We analyzed the praise score and reaction time by a 2 (intention) × 2 (outcome) × 2 (tDCS: cathodal, sham) repeated measures ANOVA. Results showed that actors with positive intentions were judged more praiseworthy than those with neutral intentions, and actors producing positive outcomes were judged more praiseworthy than those causing neutral outcomes. However, there was no significant interaction between intention and outcome. For the reaction time, judgments of positive intentions were faster than that of neutral intentions. The responses to positive outcomes were faster than neutral outcomes. Most importantly, the moral judgments were faster under cathodal tDCS than sham tDCS stimulation, especially under the positive intention condition rather than the neutral intention condition. The present study assessed the potential effect of the tDCS on helpful intention processing in moral judgment. Our findings indicate that the response times of moral judgment in the positive intention condition were shorten after receiving the cathodal stimulation, suggesting that altering the cortical excitability in the RTPJ could influence human’s socio-cognitive ability. These results demonstrate the critical role of RTPJ in intention processing during helpful moral judgment, which provides us a better understanding about the role of RTPJ in moral judgment and helping behaviors.
Subjects: Astronomy >> Astrophysical processes submitted time 2022-11-17 Cooperative journals: 《天文研究与技术》
Abstract： Semi-detached binaries are significant targets for the study of the formation and evolution of interacting binaries. Rapid modeling tool is highly required to derive the parameters with large amount of stars to be observed by many recent time-domain photometric surveys. In this work, based on a neural network, a light curve modeling of semi-detached binaries is proposed, which can derive orbital inclination(incl), relative radius(R/a), the mass ratio(q), and temperature ratio(T2/T1) fast via the observational light curve and known effective temperature of the primary star. The results of Kepler's light curve modeling show that the model can accurately fit the light curves of pulsating eclipsing binaries (the fitting degree can reach more than 0.9). For a target whose relative measurement error, orbital inclination, the amplitude of light curve, and temperature ratio are 0.01, ~90°, 1.84 mag, and 0.6, the measurement errors are 1.251, 0.004, 0.008 and 0.003 for incl, R/a, q, and T2/T1, respectively. In addition, as an application, the proposed model in this work can be deployed on other photometric data by simply replacing the train data, which provides an effective tool to obtain a large number of parameters of semi-detached binaries and fast search for candidates of abnormal binaries.
Subjects: Computer Science >> Integration Theory of Computer Science submitted time 2019-04-01 Cooperative journals: 《计算机应用研究》
Abstract： Aiming at the problem that the existing network does not consider the heterogeneity of mobile network nodes and the failure to construct a destructive virus propagation model, this paper proposed a destructive virus propagation model based on heterogeneous mobile networks. By considering the heterogeneity of mobile network nodes, this paper further divided the uninfected state into a new system state and an old system state, and combined with the latent and explosive characteristics of the destructive virus, divided the infection state into a latent state and an explosive state. This paper calculated the equilibrium point and propagation threshold of the model, and pointed out that when the propagation threshold is greater than 1, the model is unstable at the positive equilibrium point; when the propagation threshold is less than 1, the model is locally asymptotically stable at the positive equilibrium point. This paper carried out the simulation experiments on the NW small world network and the BA scale-free network. The simulation results showed that the virus propagation speeds of the two networks are different, and the NW network has a complete elimination of the virus, but BA does not have this situation.
Subjects: Computer Science >> Integration Theory of Computer Science submitted time 2018-04-24 Cooperative journals: 《计算机应用研究》
Abstract： In order to study the impact of differences in user communication capabilities on the spread of spam. This paper divided the population in the communication network into four compartments I(Ignorant) , W(Weakly spreader) , S(Strongly spreader) , R(Removal) and established state transition rules according to the theory of compartment modeling. Using differential dynamical system theory, this paper developed an IWSR spam propagation model with different communication capabilities. By calculating the basic reproduction number of the model and using the Hurwitz criterion, Lyapunov stability theorem and LaSalle invariance principle, this paper obtained the conditions for local stability and global stability of the spam information propagation equilibrium points. Finally, the comparison experiment between the numerical simulation and the Sina Weibo dataset proves that the conclusion is reasonable and effective.
Subjects: Medicine, Pharmacy >> Preclinical Medicine submitted time 2018-01-25 Cooperative journals: 《南方医科大学学报》
Abstract： Objective To compare agitated saline solution (AS) and the mixture ofAS with blood (ASb) as the contrast agents in contrast transcranial Doppler (c-TCD) in the diagnosis of patent foramen ovale (PFO). Methods We recruited 248 consecutive patients for c-TCD examination between November 2015 andJanuary 2016, and the sequence of the use of AS (9 mL saline solution mixed with 1 mL air) and ASb (9 mL saline solution and a drop of the patient's blood mixed with 1 mL air) was determined by coin-tossing method. Before the examination, the contrast agent was injected with or without Valsalva maneuvers (VM), and the number of microbubbles within 25 s after the contrast agent injection and the time of first appearanceofmicrobubbleswererecordedbyobservingtheTCDspectrum.Eachinjectionwasrepeatedtwiceandtheinterval between tests was at least 5 min. We classified PFO according to the number of microbubbles into negative (no microbubble), grade I (1-10 microbubbles), grade II (>10 microbubbles but no curtain), and grade III (with curtain)．Results The positivity rates in diagnosis withAS without VM,AS with VM,ASb without VM, andASb with VM tests were 10.9%, 23.8%, 12.1% and 25.8%, respectively. AS with VM test had a higher positive rate than AS without VM test (23.8% vs 10.9%, P=0.001), and ASb with VM test had a higher positive rate than ASb without VM test (25.8% vs 12.1%, P=0.001). The positive rates were similar betweenASb without VM andAS without VM test (12.1% vs 10.9%, P=0.250) and betweenASb with VM test andAS with VM test (25.8% vs 23.8%, P=0.125). Conclusion VM can improve the positive rate of PFO diagnosis in c-TCD examination, and the positiveratesarecomparablebetweenexaminationsusingthecontrastagentsASandASb.
Subjects: Medicine, Pharmacy >> Preclinical Medicine submitted time 2017-12-21 Cooperative journals: 《南方医科大学学报》
Abstract： Objective To establish a method for diagnosis of freshwater drowning by amplifying gyrB and 16S rRNA genes of Aeromonas hydrophila using PCR coupled with capillary electrophoresis (CE). Methods DNA samples were extracted from human, 18 planktons (including Candida albicans, Aeromonas hydrophila, and 16 species of algae), and 30 cases of tissue samples (including the lung, liver, and kidney, all examined with microwave digestion-vacuum filtration-automated scanning electron microscopy) from human cadavers, including 28 freshwater drowning victims and 2 with natural death. The DNA samples were amplified with the primer AH (for gyrB gene) and primer Ah (for 16S rRNA gene), and the products were analyzed with CE. Results PCR amplification followed by CE yielded negative results for DNA of human, Candida albicans and 16 species of algae, whereas a positive result was found for Aeromonas hydrophila DNA with PCR products of 195 bp (with primer AH) and 350 bp (with primer Ah). In the 28 drowning cases, the detection rates of Aeromonas hydrophila using primer AH were 96.4% in the lung tissue, 71.4% in the liver tissue, and 60.7% in the kidney, as compared with the rates of 75.0%, 42.9%, and 32.1% using primer Ah, respectively. The positive rates for Aeromonas hydrophila in the organs of the drowning victims were 82.1% and 53.6% with primer AH and primer Ah, respectively. The detection showed negative results in the 2 cases of natural deaths. The two primers produced significantly different detection rates of Aeromonas hydrophila (P<0.05). Conclusion PCR coupled with CE for detecting gyrB gene of Aeromonas hydrophila has a high sensitivity in assisting a diagnosis of freshwater drowning. Detection of both the gyrB gene and 16S rRNA gene of Aeromonas hydrophila can yield more convincing evidence of the diagnosis of freshwater drowning.
Subjects: Medicine, Pharmacy >> Preclinical Medicine submitted time 2017-12-07 Cooperative journals: 《南方医科大学学报》
Abstract： Objective To establish a method for amplifying specific 16S rDNA fragment of algae related with drowning and test its value in drowning diagnosis. Methods Thirty-five rabbits were randomly divided into 3 the drowning group (n=15), postmortem water immersion group (n=15, subjected to air embolism before seawater immersion), and control group(n=5, with air embolism only). Twenty samples of the liver tissues from human corpses found in water were also used, including 14 diatom-positive and 6 diatom-negative samples identified by microwave digestion-vacuum filtration-automated scanning electron microscopy (MD-VF-Auto SEM). Seven known species of algae served as the control algae (Melosira sp, Nitzschia sp, Synedra sp, Navicula sp, Microcystis sp, Cyclotella meneghiniana, and Chlorella sp). The total DNA was extracted from the tissues and algae to amplify the specific fragment of algae followed by 8% polyacrylamide gelelectrophoresis and sliver-staining. Results In the drowning group, algae was detected in the lungs (100%), liver (86%), and kidney (86%); algae was detected in the lungs in 2 rabbits in the postmortem group (13% ) and none in the control group. The positivity rates of algae were significantly higher in the drowning group than in the postmortem group (P<0.05). Of the 20 tissue samples from human corps found in water, 15 were found positive for algae, including sample that had been identified as diatom-negative by MD-VF-Auto SEM. All the 7 control algae samples yielded positive results in PCR. Conclusion The PCR-based method has a high sensitivity in algae detection for drowning diagnosis and allows simultaneous detection of multiple algae species related with drowning.
Subjects: Biology >> Bioengineering submitted time 2017-07-24 Cooperative journals: 《中国生物工程杂志》
Abstract： Objective: Exogenous RNAs can specifically up-regulate or down-regulate gene expression after they enter into cells. The preparation methods of exogenous RNAs mainly include chemical synthesis, in vitro transcription and extraction from cells. Alu DNA and Alu RNA are the main constituents of human genome and transcriptome and participate in gene expression regulation. In this paper, the technology method of preparing genetically engineered humanized Alu RNA (Alu RNA) from engineering bacteria was established. The extracted RNAs using this technology method can satisfy the requirement of general biology experiments. Methods and results: Different copies of human Alu elements were inserted into pET-28α plasmid (pET) to construct pET-Alu plasmids that were transformed into BL-21 bacteria. The effects of different conditions on the Alu RNA production were explored. Isopropylthio-β-d-galactoside (IPTG) induction inhibited transformed bacterial growth after BMBL-21 (DE3) competent cells (DE3 cells) were transformed by pET-Alu×8 plasmid (8 copies of Alus were inserted into pET); Northern blotting was used to detect the amount of Alu RNA after 2, 4, 6, 8, 10, 12, 14 and 16 hours inducing with IPTG. The results showed that the amount of Alu RNA was highest at 4 hours; 1, 2, 4, 8 or 14 copies of Alu elements were inserted into the pET to construct pET-Alu plasmids that were transformed into DE3 bacteria, the northern blotting results showed that Alu RNA production amount increased with the increase of Alu copy number; pET-Alu×8 DE3 bacteria did not produce Alu RNA without IPTG induction, Alu RNA production kept similar when inducing by 0.1 to 0.4 mg / ml IPTG induction, however, Alu RNA production slightly decreased if deviating from the above concentration range; pET-Alu×8 DE3 bacteria were cultured at 34 ℃, 37 ℃ or 40 ℃ and then were induced by IPTG for 4 hours, the results showed that, under the condition of 37 ℃ cultivation, Alu RNA production was the highest; pET-Alu×8 plasmid was transformed into three kinds of BL-21 cells, including DE3, BMBL21-DE3-pLysS (pLysS) and Trans BL 21 (TransBL), the results showed that Alu RNA production was the highest when using pET-Alu×8 DE3. Conclusion: In this paper, the preparation technology of genetically engineered humanized Alu RNA was established. The highest production of Alu RNA can be obtained based on the following conditions: pET-Alu×14 plasmid was transformed into DE3 bacteria; the transformed bacteria were cultured at 37 ℃ to OD 1.0 at 600 nm, and then were induced by 0.2 mg / ml IPTG for 4 hours. Pure Alu RNA occupies 15.8% of extractive RNA and the mean yield of pure Alu RNA in 100 ml bacteria solution is 0.46 mg.
Subjects: Geosciences >> Space Physics submitted time 2017-01-22
Abstract： A technique of using a semiconductor diode volt-ampere characteristic to test Langmuir probe performance is presented. The Langmuir probe is an important technique for in-suit detecting the space plasma, and its performance test is the key to ensure that its technical indicators can meet the mission requirements. The technique of using a semiconductor diode volt-ampere characteristic demands less of external factors, so it can be carried out in a laboratory environment. The test results can be used as preliminary performance verification before calibration test of ground plasma environment, and it is proved that the method is effective and feasible in a lab environment test.
Peer Review Status:
Awaiting Review
Subjects: Geosciences >> Space Physics submitted time 2016-05-13
Abstract： A technique of using a semiconductor diode volt-ampere characteristic to test Langmuir probe performance is presented. The Langmuir probe is an important technique for in-suit detecting the space plasma, and its performance test is the key to ensure that its technical indicators can meet the mission requirements. The technique of using a semiconductor diode volt-ampere characteristic demands less of external factors, so it can be carried out in a laboratory environment. The test results can be used as preliminary performance verification before calibration test of ground plasma environment, and it is proved that the method is effective and feasible in a lab environment test.
Peer Review Status:Awaiting Review
Hits
YES
Hits
Downloads
Comment