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Jittor-GAN:A fast-training generative adversarial network model zoo based on Jittor

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Computational Visual Media 2021年第1期7卷 153-157页

作者： Wen-yang Zhou guo-wei yang Shi-Min Hu BNRist Tsinghua UniversityBeijing 100084China

With the emergence of CNNs and massive datasets,the performance of many tasks in computer vision has been greatly improved,such as object detection,instance segmentation,and image *** last has many novel applications,... 详细信息

关键词： computer image network

Numerical study on wake characteristics of high-speed trains

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Acta Mechanica Sinica 2013年第6期29卷 811-822页

作者： Shuan-Bao Yao Zhen-Xu Sun Di-Long guo Da-wei Chen guo-wei yang Key Laboratory for Mechanics in Fluid Solid Coupling Systems Institute of MechanicsCAS CSR Qingdao Sifang Locomotive Co.Ltd.

Intensive turbulence exists in the wakes of high speed trains, and the aerodynamic performance of the trailing car could deteriorate rapidly due to complicated features of the vortices in the wake zone. As a result, the safety and amenity of high speed trains would face a great challenge. This paper considers mainly the mechanism of vortex formation and evolution in the train flow field. A real CRH2 model is studied, with a leading car, a middle car and a trailing car included. Different running speeds and cross wind conditions are considered, and the approaches of un- steady Reynold-averaged Navier-Stokes （URANS） and de- tached eddy simulation （DES） are utilized, respectively. Re- suits reveal that DES has better capability of capturing small eddies compared to URANS. However, for large eddies, the effects of two approaches are almost the same. In conditions without cross winds, two large vortex streets stretch from the train nose and interact strongly with each other in the wake zone. With the reinforcement of the ground, a complicated wake vortex system generates and becomes strengthened as the running speed increases. However, the locations of flow separations on the train surface and the separation mechanism keep unchanged. In conditions with cross winds, three large vortices develop along the leeward side of the train, among which the weakest one has no obvious influence on the wake flow while the other two stretch to the tail of the train and combine with the helical vortices in the train wake. Thus, optimization of the aerodynamic performance of the trailing car should be aiming at reducing the intensity of the wake vortex system.

关键词： Wake flow structures URANS DES High speed trains

JNeRF:An efficient heterogeneous NeRF model zoo based on Jittor

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Computational Visual Media 2023年第2期9卷 401-404页

作者： guo-wei yang Zheng-Ning Liu Dong-yang Li Hao-yang Peng Department of Computer Science and Technology Tsinghua UniversityBeijing 100084China Fitten Tech Co. Ltd.Beijing 100084China

Neural radiance fields(NeRFs)for novel-view synthesis have attracted the attention of researchers in computer vision and *** traditional methods using explicit expressions,NeRFs represent a scene as an implicit neural radiance *** rendering,NeRF queries the color density at every position in the scene through a neural *** brings a wide range of possibilities for real-world 3D reconstruction and rendering,but problems remain to be *** works have improved NeRF’s sampling technique,position encoding method,network structure,etc.,but these improvements are difficult to be combined as the different modules are not well *** works have significantly sped up the core GPU computation of NeRF,leaving the deep learning framework as a major computational ***,it has been suggested to replace the frameworks by pure CUDA programs,but this limits maintainability and ***,we propose JNeRF,a unified,efficient,framework-friendly NeRF model zoo based on Jittor.

关键词： neural graphics rendering

Use of a modified tracheal tube in a child with traumatic bronchial rupture:A case report and review of literature

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World Journal of Clinical Cases 2021年第29期9卷 8915-8922页

作者： Qi-Meng Fan wei-guo yang Pediatric Intensive Care Unit Shenzhen Children's HospitalShenzhen 518000Guangdong ProvinceChina Medical College Shantou UniversityShantou 515063Guangdong ProvinceChina

BACKGROUND Trauma is one of the leading causes of death in the pediatric *** rupture is rare,but there are potentially severe *** and maintaining a patent airway is the key issue in patients with bronchial *** we describe an innovative method for maintaining a patent *** SUMMARY A 3-year-old boy fell from the seventh *** worsened rapidly with pulse oxygen saturation decreasing below 60%,as his heart rate *** pneumothorax was observed with insertion of the chest *** bronchoscopy was performed,which confirmed the diagnosis of bronchial rupture.A modified tracheal tube was inserted under the guidance of a fiberoptic *** oxygen saturation improved from 60%to 90%.Twelve days after admission,right upper lobectomy was performed using bronchial stump suture by video-assisted thoracic surgery without complications.A follow-up chest radiograph showed good *** child was discharged from hospital three months after *** A modified tracheal tube could be selected to ensure a patent airway and adequate ventilation in patients with bronchial rupture.

关键词： Bronchial rupture Children Respiratory support Tracheal tube Case report

Nutrient Deficiency Affects Root Architecture of Young Seedlings of Malus hupehensis (Pamp) Rehd. Under Conditions of Artificial Medium Cultivation

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Agricultural Sciences in China 2007年第3期6卷 296-303页

作者： FAN wei-guo yang Hong-qiang College of Horticulture Science and Engineering Shandong Agricultural University Taian 271018 P.R.China

What the researchers go in for is to establish models between root architecture （RA） changes and nutrition, mold ideal root architecture of apple trees, improve the nutrient uptake efficiency, and further explore the functional mechanism of nutrient elements during the course of RA construction. The cultivation system of filter paper is utilized to research the effect of nutrient deficiency on the RA of Malus hupehensis （Pamp.） Rehd. There may be eight types of RA. In complete Hogland solution, the main type of RA is ＂lateral roots clustering in the upper and middle regions of primary root＂. With the lack of P, K or Ca, the main type of RA is ＂lateral roots clustering in the upper region primary root＂, and the ＂lateral roots clustering in the upper and middle regions of primary root＂ types of RA decrease. But with shortage of P, the type of lateral roots clustering in the upper and lower regions of primary root increases, and the type of lateral roots clustering in the middle region of primary root decreases, with the types of RA diversified. Under the condition of K deficiency, the type of no lateral root increases and types of lateral roots clustering in the middle region of primary root decrease, and the percentage of such types as ＂no lateral root＂, ＂lateral roots clustering in the upper region of primary root＂, and ＂lateral roots clustering in the upper and middle regions of primary root＂ accounts for 97.9% in all, with the types of RA simplified. With lack of Fe, Mg or Zn, the main type of RA is ＂lateral roots clustering in the upper and middle regions of primary root＂, but the type of lateral roots evenly-distributed on primary root increases. The main type of RA is ＂lateral roots evenlydistributed on primary root＂, under the condition of N deficiency, and the types of RA turn out to be diversified. There exists a close relation between nutrient deficiency and RA changes. Owing to various forms of nutrient deficiency, correspondingly different types of RA hav

关键词： Malus hupehensis (Pamp.) Rehd. paper-culture root architecture (RA) nutrient deficiency

Synthesis and Crystal Structure of (3,6-Dichloro-2-nitrophenyl)(3-nitrophenyl)methanone

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Chemical Research in Chinese Universities 2011年第3期27卷 422-425页

作者： BAI Fang GAO guo-wei WANG yang MEN Jian College of Chemistry Sichuan University Chengdu 610064 P. R. China

Novel compounds, （3,6-dichloro-2-nitrophenyl）（3-nitrophenyl）methanone（2）, （2-amino-3,6-dichloro- phenyl）（3-aminophenyl）methanone（3） and 1-[3-（2-amino-3,6-dichlorobenzoyl）phenyl]-1H-pyrrole-2,5-dione（4）, were synthesized from the initial compound 2,5-dichlorobenzophenone（1） and characterized by 1H NMR, 13C NMR, IR, mass spectrum and element analysis, respectively. The single crystal of compound 2 was obtained and determined by X-ray diffraction analysis. The single crystal data illustrates that it belongs to the monoclinic system, space group P21/c with a=0.7587（4） nm, b=2.4724（4） nm, c=0.8081（3） nm, α=90°, β=112.85（2）°, γ=90o, V=1.3970（9） nm3, Z=4, Dc=1.622 g/cm3, Mr（C13H6Cl2N2O5）=341.10, μ（Mo Kα）=0.49 mm？1, F（000）=688, the final R=0.048 and wR=0.144 for 1665 observed reflections with I2σ（I）. The title molecule forms a ＂T＂ type crystal structure and the dihedral angel of the two phenyl rings is 65.0（1）°.

关键词： (3 6-Dichloro-2-nitrophenyl)(3-nitrophenyl)methanone Crystal structure Maleimide

Laser fragmentation in liquid synthesis of novel palladium-sulfur compound nanoparticles as efficient electrocatalysts for hydrogen evolution reaction

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Chinese Physics B 2022年第7期31卷 34-40页

作者： guo-Shuai Fu Hong-Zhi Gao guo-wei yang Peng Yu Pu Liu State Key Laboratory of Optoelectronic Materials and Technologies Nanotechnology Research CenterSchool of Materials Science&EngineeringSun Yat-sen UniversityGuangzhou 510275China

One promising way to tune the physicochemical properties of materials and optimize their performance in various potential applications is to engineer material structures at the atomic *** is well known,the performance of Pd-based catalysts has long been constrained by surface contamination and their single ***,we employed an unadulterated top-down synthesis method,known as laser fragmentation in liquid(LFL),to modify pristine Pd PS crystals and obtained a kind of metastable palladium-sulfur compound nanoparticles(LFL-Pd S NPs)as a highly efficient electrocatalyst for hydrogen evolution reaction(HER).Laser fragmentation of the layered Pd PS crystal led to a structural reorganization at the atomic level and resulted in the formation of uniform metastable LFL-Pd S ***,the LFL-Pd S NPs show excellent electrocatalytic HER performance and stability in acidic media,with an overpotential of-66 m V at 10 m A·cm^(-2),the Tafel slope of 42 m V·dec^(-1).The combined catalytic performances of our LFL-Pd S NPs are comparable to the Pt/C catalyst for *** work provides a top-down synthesis strategy as a promising approach to design highly active metastable metal composite electrocatalysts for sustainable energy applications.

关键词： Pd-based electrocatalyst hydrogen evolution reaction laser fragmentation in liquid nanoparticles

Strong Law of Large Numbers and Asymptotic Equipartition Probability for Nonsymmetric Markov Chain Indexed by Cayley Tree

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Journal of Mathematical Research and Exposition 2010年第6期30卷 976-984页

作者： Yan DONG wei guo yang Department of Mathematics Shanghai Jiaotong UniversityShanghai 200240P.R.China Faculty of Science Jiangsu UniversityJiangsu 212013P.R.China

In this paper,we study the strong law of large numbers for the frequencies of occurrence of states and ordered couples of states for nonsymmetric Markov chain（NSMC） indexed by Cayley tree with any finite *** asymptotic equipartition properties with almost everywhere（a.e.） convergence for NSMC indexed by Cayley tree are *** article generalizes a recent result.

关键词： strong law of large numbers nonsymmetric Markov chain Cayley tree asymptotic equipartition property.

Inhibitory effect of modified citrus pectin on liver metastases in a mouse colon cancer model

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World Journal of Gastroenterology 2008年第48期14卷 7386-7391页

作者： Hai-Ying Liu Zhi-Liang Huang guo-Hua yang wei-Qun Lu Nan-Rong Yu Department of Abdominal Surgery Affiliated Tumor Hospital of Guangzhou Medical College Guangzhou 510095 Guangdong Province China

AIM: To discuss the expression of glactin-3 in liver metastasis of colon cancer and its inhibition by modi- fied citrus pectin (MCP) in mice. METHODS: Seventy-five Balb/c mice were randomly di- vided into negative control group (n = 15), positive con- trol group (n = 15), low MCP concentration group (n = 15), middle MCP concentration group (n = 15) and high MCP concentration group (n = 15). CT26 colon cancer cells were injected into the subcapsule of mouse spleen in positive control group, low, middle and high MCP concentrations groups, except in negative control, to set up a colon cancer liver metastasis model. The concen- tration of MCP in drinking water was 0.0%, 0.0%, 1.0%, 2.5% and 5.0% (wt/vol), respectively. Liver metastasis of colon cancer was observed after 3 wk. Enzyme-linked immunosorbent assay (ELISA) was used to detect the concentration of galectin-3 in serum. Expression of ga- lectin-3 in liver metastasis was detected by immunohis- tochemistry. RESULTS: Except for the negative group, the percent- age of liver metastasis in the other 4 groups was 100%, 80%, 73.3% and 60%, respectively. The number of liver metastases in high MCP concentration group was significantly less than that in positive control group (P = 0.008). Except for the negative group, the median volume of implanted spleen tumor in the other 4 groups was 1.51 cm3, 0.93 cm3, 0.77 cm3 and 0.70 cm3, respec- tively. The volume of implanted tumor in middle and high MCP concentration groups was significantly smaller than that in positive control group (P = 0.019; P = 0.003). The concentration of serum galectin-3 in positive control and MCP treatment groups was significantly higher than that in the negative control group. However, there was no significant difference between them. Except for the negative control group, the expression of galectin-3 in liver metastases of the other 4 groups showed no sig- nificant difference. CONCLUSION: Expression of galetin-3 increases sig- nificantly in liver meta

关键词： Pectin Colonic neoplasms Metastasis Liver Mice