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"Kong, Yu"
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Human Action Recognition and Prediction: A Survey
Derived from rapid advances in computer vision and machine learning, video analysis tasks have been moving from inferring the present state to predicting the future state. Vision-based action recognition and prediction from videos are such tasks, where action recognition is to infer human actions (present state) based upon complete action executions, and action prediction to predict human actions (future state) based upon incomplete action executions. These two tasks have become particularly prevalent topics recently because of their explosively emerging real-world applications, such as visual surveillance, autonomous driving vehicle, entertainment, and video retrieval, etc. Many attempts have been devoted in the last a few decades in order to build a robust and effective framework for action recognition and prediction. In this paper, we survey the complete state-of-the-art techniques in action recognition and prediction. Existing models, popular algorithms, technical difficulties, popular action databases, evaluation protocols, and promising future directions are also provided with systematic discussions.
Journal Article
دراسات حول الفضاء العالمي و\الحزام والطريق\ : (مجلد الثقافة)
ينطلق هذا المجلد من العلاقة الهيكلية بين \"الفضاء\" و\"الثقافة\"، ويجمع بين مفهوم \"الفضاء\" في الجغرافيا ومفهوم \"السياق\" في الدراسات الثقافية وغيرهم من المفاهيم الأخرى، ويشرح نماذج ودلالات وأهداف مبادرة \"الحزام والطريق\" في سياق الحضارة الحديثة، ويصف صورة امتداد الحضارة على المحور التاريخي لـ \"الحزام والطريق\"، ويحلل الدلالة الثقافية في كل من اتجاه القيمة وبناء القوة الناعمة وإنشاء السياق الشرقي الخاصين بمبادرة \"الحزام والطريق\"، ويفسر علاقة الارتباط بين الثقافة الوطنية لـ \"الحزام والطريق\" والفضاء الوطني، ويكشف عن السرد عبر الفضاء للرموز الثقافية لـ \"الحزام والطريق\" ويوضح التعبير الرقمي والمرئي لواقع \"الحزام والطريق\"
Book
High-performance silk-based hybrid membranes employed for osmotic energy conversion
The salinity gradient between seawater and river water is a clean energy source and an alternative solution for the increasing energy demands. A membrane-based reverse electrodialysis technique is a promising strategy to convert osmotic energy to electricity. To overcome the limits of traditional membranes with low efficiency and high resistance, nanofluidic is an emerging technique to promote osmotic energy harvesting. Here, we engineer a high-performance nanofluidic device with a hybrid membrane composed of a silk nanofibril membrane and an anodic aluminum oxide membrane. The silk nanofibril membrane, as a screening layer with condensed negative surface and nanochannels, dominates the ion transport; the anodic aluminum oxide membrane, as a supporting substrate, offers tunable channels and amphoteric groups. Thus, a nanofluidic membrane with asymmetric geometry and charge polarity is established, showing low resistance, high-performance energy conversion, and long-term stability. The system paves avenues for sustainable power generation, water purification, and desalination.
Membrane-based reverse electrodialysis is promising for salinity gradient power generation, but achieving efficiency and stability is challenging. Here the authors design silk nanofibril-based hybrid membranes to realize high-performance capture of osmotic energy from ambient waters.
Journal Article
دراسات حول الفضاء العالمي و\الحزام والطريق\ : (مجلد السياحة)
إن استراتيجية \"الحزام والطريق\" هي عملية طويلة الأمد، ولا يمكن وصف دورها في تعزيز تنمية السياحة ببساطة. يحلل \"الفضاء العالمي و\"حزام واحد وطريق واحد\" حجم السياحة\" الوضع الحالي لتنمية السياحة العالمية في سياق استراتيجية \"حزام واحد وطريق واحد\"، ويقدم بالتفصيل تطور السياحة العالمية والخلفية السياحية. \"حزام وطريق\"، بما في ذلك نظرة عامة على صناعة السياحة العالمية، والاتجاهات الجديدة في تنمية السياحة العالمية ونمط السياحة العالمية، وما إلى ذلك، واستنادا إلى تحليل فرص وتحديات تنمية السياحة العالمية والصينية، والتأثير الترويجي لـ \"حزام واحد وطريق واحد\"، وتم تفسير استراتيجية \"الحزام والطريق\" لتنمية السياحة.
Book
Biomimetic KcsA channels with ultra-selective K+ transport for monovalent ion sieving
Ultra-selective and fast transport of K
+
are of significance for water desalination, energy conversion, and separation processes, but current bottleneck of achieving high-efficiency and exquisite transport is attributed to the competition from ions of similar dimensions and same valence through nanochannel communities. Here, inspired by biological KcsA channels, we report biomimetic charged porous subnanometer cages that enable ultra-selective K
+
transport. For nanometer to subnanometer scales, conically structured double-helix columns exhibit typical asymmetric transport behaviors and conduct rapid K
+
with a transport rate of 94.4 mmol m
−2
h
−1
, resulting in the K
+
/Li
+
and K
+
/Na
+
selectivity ratios of 363 and 31, respectively. Experiments and simulations indicate that these results stem from the synergistic effects of cation-π and electrostatic interactions, which impose a higher energy barrier for Li
+
and Na
+
and lead to selective K
+
transport. Our findings provide an effective methodology for creating in vitro biomimetic devices with high-performance K
+
ion sieving.
Materials for the selective transport of K
+
have application in a variety of fields including water desalination and separation processes. Here the authors report charged porous subnanometer cages that are inspired in biological KcsA channels; high K
+
transport rates and high K
+
/Li
+
and K
+
/Na
+
selectivity ratios are obtained, showing great potential in advanced sieving processes and efficient water treatments.
Journal Article
دراسات حول الفضاء العالمي و\الحزام والطريق\ : (مجلد البيئة الإيكولوجية)
إن معظم الدول والمناطق على طول «الحزام والطريق» هي دول نامية، وتعاني جميعا من مشكلات في البيئة الإيكولوجية أكثر أو أقل، كما إنها تواجه تحديات ضخمة في التوازن بين التنمية وحماية البيئة. وتواجه هذه البلدان النامية فرصا غير مسبوقة أتاحها المفهوم الاستراتيجي لمبادرة «الحزام والطريق»، كما أن كيفية التعامل مع التحدي المتمثل في حماية البيئة الإيكولوجية أثناء بناء وتطوير «الحزام والطريق» هي المهمة الأساسية التي تواجهها البلدان النامية بما فيها الصين. ويناقش هذا الكتاب ويلخص الخلفية البيئية الإيكولوجية للبلدان/ المناطق المشاركة في مبادرة \"الحزام والطريق\" والمشكلات الرئيسية في هذا الجانب.
Book
Large-scale, national, family-based epidemiological study on Helicobacter pylori infection in China: the time to change practice for related disease prevention
Background and aimsCurrent practice on Helicobacter pylori infection mostly focuses on individual-based care in the community, but family-based H. pylori management has recently been suggested as a better strategy for infection control. However, the family-based H. pylori infection status, risk factors and transmission pattern remain to be elucidated.MethodsFrom September 2021 to December 2021, 10 735 families (31 098 individuals) were enrolled from 29 of 31 provinces in mainland China to examine family-based H. pylori infection, related factors and transmission pattern. All family members were required to answer questionnaires and test for H. pylori infection.ResultsAmong all participants, the average individual-based H. pylori infection rate was 40.66%, with 43.45% for adults and 20.55% for children and adolescents. Family-based infection rates ranged from 50.27% to 85.06% among the 29 provinces, with an average rate of 71.21%. In 28.87% (3099/10 735) of enrolled families, there were no infections; the remaining 71.13% (7636/10 735) of families had 1–7 infected members, and in 19.70% (1504/7636), all members were infected. Among 7961 enrolled couples, 33.21% had no infection, but in 22.99%, both were infected. Childhood infection was significantly associated with parental infection. Independent risk factors for household infection were infected family members (eg, five infected members: OR 2.72, 95% CI 1.86 to 4.00), living in highly infected areas (eg, northwest China: OR 1.83, 95% CI 1.57 to 2.13), and large families in a household (eg, family of three: OR 1.97, 95% CI 1.76 to 2.21). However, family members with higher education and income levels (OR 0.85, 95% CI 0.79 to 0.91), using serving spoons or chopsticks, more generations in a household (eg, three generations: OR 0.79, 95% CI 0.68 to 0.92), and who were younger (OR 0.57, 95% CI 0.46 to 0.70) had lower infection rates (p<0.05).ConclusionFamilial H. pylori infection rate is high in general household in China. Exposure to infected family members is likely the major source of its spread. These results provide supporting evidence for the strategic changes from H. pylori individual-based treatment to family-based management, and the notion has important clinical and public health implications for infection control and related disease prevention.
Journal Article
دراسات حول الفضاء العالمي و\الحزام والطريق\ : (مجلد الموانئ البحرية)
ينقسم الكتاب إلى خمسة فصول، يقدم الفصل الأول نظام الموانئ العالمي والعلاقات بين المدن الساحلية والتعاون في مجال الموانئ، ويناقش الفصل الثاني الخدمات اللوجستية البحرية العالمية وتطوير لوجستيات الموانئ الرئيسية، ويتناول الفصل الثالث نظام الموانئ في الصين وخصائصه. الاستجابة العالمية: يحلل الفصل الرابع بشكل رئيسي مؤشر البلطيق، وهو مؤشر تقييم مراكز الشحن الدولية، ويناقش الفصل الخامس نمط الموانئ العالمية وتغيرات النظام وتطور النقل البحري بناءً على منظور عالمي.
BOOK
Recent developments in application of single-cell RNA sequencing in the tumour immune microenvironment and cancer therapy
The advent of single-cell RNA sequencing (scRNA-seq) has provided insight into the tumour immune microenvironment (TIME). This review focuses on the application of scRNA-seq in investigation of the TIME. Over time, scRNA-seq methods have evolved, and components of the TIME have been deciphered with high resolution. In this review, we first introduced the principle of scRNA-seq and compared different sequencing approaches. Novel cell types in the TIME, a continuous transitional state, and mutual intercommunication among TIME components present potential targets for prognosis prediction and treatment in cancer. Thus, we concluded novel cell clusters of cancer-associated fibroblasts (CAFs), T cells, tumour-associated macrophages (TAMs) and dendritic cells (DCs) discovered after the application of scRNA-seq in TIME. We also proposed the development of TAMs and exhausted T cells, as well as the possible targets to interrupt the process. In addition, the therapeutic interventions based on cellular interactions in TIME were also summarized. For decades, quantification of the TIME components has been adopted in clinical practice to predict patient survival and response to therapy and is expected to play an important role in the precise treatment of cancer. Summarizing the current findings, we believe that advances in technology and wide application of single-cell analysis can lead to the discovery of novel perspectives on cancer therapy, which can subsequently be implemented in the clinic. Finally, we propose some future directions in the field of TIME studies that can be aided by scRNA-seq technology.
Journal Article