To solve the problem that traditional trajectory prediction methods cannot meet the requirements of high-precision, multi-dimensional and real-time prediction, a 4D trajectory prediction model based on the backpropagation (BP) neural network was studied. First, the hierarchical clustering algorithm and the k-means clustering algorithm were adopted to analyze the total flight time. Then, cubic spline interpolation was used to interpolate the flight position to extract the main trajectory feature. The 4D trajectory prediction model was based on the BP neural network. It (...) was trained by Automatic Dependent Surveillance – Broadcast trajectory from Qingdao to Beijing and used to predict the flight trajectory at future moments. In this paper, the model is evaluated by the common measurement index such as maximum absolute error, mean absolute error and root mean square error. It also gives an analysis and comparison of the predicted over-point time, the predicted over-point altitude, the actual over-point time and the actual over-point altitude. The results indicate that the predicted 4D trajectory is close to the real flight data, and the time error at the crossing point is no more than 1 min and the altitude error at the crossing point is no more than 50 m, which is of high accuracy. (shrink)

Most recently, two distinctions—echoing the cross-disciplinary critique of the teleological and “quantitative” approach of human arts and sciences at the expanse of the “qualitative”—have been foregrounded by Amzallag (Philosophy and Technology 34, 785–809, 2021) and Crease (2011), respectively, between the modern understanding of “technology” (as technopraxis) and the “forgotten dimension/phase of technology” (called technopoiesis) and between the ontic and ontological measurement. Pace gently the denotation of technopoiesis as a juvenile phase of technological development and the “ontological measurements” as logical and (...) practical impossibility in the modern, mathematized metroscape, the paper reexamines the relevancy of the distinctions (ontic/ontological and po[i]etic/practical, both recalling Heidegger’s “hermeneutical” critique of Husserl’s phenomenology) in non-Platonic/Aristotelian contexts and, in the process, seeks to refine the vital notion of technopoiesis by looking at the intersection of these fuzzy domains. In particular, the ancient Chinese measurements and their understudied onto-poietic dimension in the shifting econ-political contexts may offer an alternative approach to the otherwise elusive presence of technopoiesis and its ontological roots. Arguing that the techno-onto-poiesis does not necessarily belong to the foregone Arcadian past, the paper proposes refined “signals” for recognizing the technopoietic as well as new “forms” of its presence—“interactive emergence” (the cross-stimulating agonistic interactions between techniques of different “stages”) and “poietic clusters” (poietic ideas and/or implements that survive as “cluster” into the future), calling for future investigation of technical inventiveness (even in modern times) that reveal the process of how technopoietic elements enter the lives of technology through least expected embodiment. (shrink)

Previous researchers have found that head-down bed rest will affect the emotional state of individuals, and negative emotions such as anxiety are closely related to attention bias. The present study adopted the dot-probe task to evaluate the effects of 15-days of −6° HDBR on the attention bias of threatening stimulus in 17 young men, which was completed before, during, after the bed rest. In addition, self-report inventories were conducted to record emotional changes. The results showed that the participants’ negative affect (...) scores on HDBR-8 were significantly lower than the HDBR-1 in PANAS while there was no significant difference on positive affect scores and anxiety scores in SAI. And the results showed that at the Pre-HDBR, HDBT-1, HDBR-15, Post-HDBR, the response speed to threatening stimulus was faster than neutral stimulus, but no statistical significance. However, reaction time of threatening stimulus is significantly longer than neutral stimulus in the HDBR-8, indicating that HDBR may have an effect on the participants’ attention bias, and this effect is manifested as attention avoidance. (shrink)

A piece of wax—typically of a spherical shape—has been evoked occasionally as an apt example of how our engagement with the commonest everyday object may constitute a “raw” yet unexpectedly rich (and taxing) experience, from the Aristotelian discourse of Περὶ Ψυχῆς (_On the Soul_) to the ancient Chinese historical treatises, where the technique of making _lajuan _(wax-embraced silk) became a practical metaphor for the low-key transmission of classified information. Using the semi-enclosed, “walled” space—specifically, made of the material of wax from (...) Descartes’ often misread _Meditationes_—as a metaphor of an unlikely shape or structure for inducing the presence of the absent (e.g., memories of personal lives or ancient technology), the paper responds to Hoły-Łuczaj (Philosophy & Technology 36:19, 2023 )’s favorable and subtle touches in the Commentary on the recent study of ancient Eastern measurement and measuring thinking (Philosophy & Technology 36:22, 2023 ; Philosophy & Technology 34(4):785–809, 2021 ) by relating to the childhood experience of living with measuring tools and measuring/measured person(s) (_homō _-_mētiēns_/-_mēnsus_; to be distinguished from the Pythagorean formula of _homo_-_mensura _or man _as _the measure [of everything]). (shrink)

Post-stroke depression is a serious complication of stroke that significantly restricts rehabilitation. The use of immersive virtual reality for stroke survivors is promising. Herein, we investigated the effects of a novel immersive virtual reality training system on PSD and explored induced effective connectivity alterations in emotional networks using multivariate Granger causality analysis. Forty-four patients with PSD were equally allocated into an immersive-virtual reality group and a control group. In addition to their usual rehabilitation treatments, the participants in the immersive-virtual reality (...) group participated in an immersive-virtual reality rehabilitation program, while the patients in the control group received 2D virtual reality rehabilitation training. The Hamilton Depression Rating Scale, modified Barthel Index, and resting-state functional magnetic resonance imaging data were collected before and after a 4-week intervention. rsfMRI data were analyzed using multivariate GCA. We found that the immersive virtual reality training was more effective in improving depression in patients with PSD but had no statistically significant improvement in MBI scores compared to the control group. The GCA showed that the following causal connectivities were strengthened after immersive virtual reality training: from the amygdala, insula, middle temporal gyrus, and caudate nucleus to the dorsolateral prefrontal cortex; from the insula to the medial prefrontal cortex; and from the thalamus to the posterior superior temporal sulcus. These causal connectivities were weakened after treatment in the control group. Our results indicated the neurotherapeutic use of immersive virtual reality rehabilitation as an effective non-pharmacological intervention for PSD; the alteration of causal connectivity in emotional networks might constitute the neural mechanisms underlying immersive-virtual reality rehabilitation in PSD. (shrink)

Having read the works of Wang Ch'ung [A.D. 27-c. 100], I realized that they need to be recapitulated. Here I shall evaluate Wang Ch'ung and his thought and present what I feel to be the real significance that Wang Ch'ung's thought still has today.

In ancient times in our country, Wang Ch'ung was an eminent materialist and a brilliant atheist, a progressive thinker who opposed the orthodox feudal thought. This has gone basically unquestioned. This year the February 21 issue of Kuang-ming jih-pao printed in its philosophy section an article by Comrade T'ung Mo-an, "Is Wang Ch'ung a Peasant Class Thinker?" The article is an evaluation completely denying this. T'ung believes that the purpose of Wang Ch'ung's works was "to uphold the rule of the (...) Han," "ardently and unconditionally to sing the praises of the Han ruler and court," "to make sacred the rule of the Han," "to get the populace to live quietly, forever in a servile position," and "to view inimically and to slander peasant uprisings." "Wang Ch'ung was an orthodox thinker of the landlord class," "a thinker produced in the interests of the rule of the landlord class who confirmed the feudal orthodoxy." Although I myself am not praising Wang Ch'ung as a peasant class thinker or denying that in Wang Ch'ung's thought there are negative elements, I am completely unable to agree with the basic viewpoint that the author puts forward. (shrink)