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Shifting from Metro to Sustainable Surface Modes for Short-Distance Travel

TRANSPORTATION RESEARCH RECORD 2016年第2541期2541卷 38-45页

作者： Zacharias, John li, xuwen Peking Univ Coll Architecture & Landscape 5 Yihe Yuan Rd Beijing 100871 Peoples R China

Many cities with metro systems are experiencing overcapacity problems on some or many lines. Beijing is one such city whose metro also services a high proportion of short-distance trips. The proportion of short-distance travel-less than 5 km (3.1 mi)-carried out on foot or on bicycle varies greatly across cities, depending on alternative travel modes and local environmental conditions. In this study, users of a multimodal transportation corridor that included metro (n = 400) were interviewed about their travel mode preferences depending on distance within the short-distance travel category. Users were also asked to state their preferences for mode, depending on distance and a progressive rise in metro ticket fare. Finally, users were asked to state their mode preferences for trips that extended to five metro stations if a public bicycle system with a separate lane were made available. Modal choice was highly sensitive to variable short-distance trips. A progressive shift to bus use occurred as the metro fare price increased, with little change in the walking rate or in the use of motorized modes. When the original low metro fare price was maintained, the availability of a public bicycle system led to a sevenfold increase in bicycle use, with significant drops in bus share, and to a lesser extent, metro share. Responses to the stated preference survey indicated that fares and a public bicycle program might be effective to manage the use of metro for short-distance trips.

关键词： Bicycles

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PLA光学纯度和等温退火处理对熔喷非织造布结构与性能的影响

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印染 2025年第2期51卷 45-48页

作者：李旭文于本成王鹏王金剑陈鹏传化智联股份有限公司浙江杭州311215 中国科学院宁波材料技术与工程研究所浙江省生物基高分子材料技术与应用重点实验室宁波市高分子材料重点实验室浙江宁波315201

选用4种不同PLA原料制备熔喷非织造布,测试了纤维直径、热结晶性能、表面电压和过滤效率衰减,并将熔融指数接近但光学纯度不同的PLA原料制备的驻极非织造布进行等温退火处理,以探究结晶对非织造布力学性能的影响。结果表明:光学纯度较高... 详细信息

选用4种不同PLA原料制备熔喷非织造布,测试了纤维直径、热结晶性能、表面电压和过滤效率衰减,并将熔融指数接近但光学纯度不同的PLA原料制备的驻极非织造布进行等温退火处理,以探究结晶对非织造布力学性能的影响。结果表明:光学纯度较高的PLA原料的结晶性能要优于光学纯度低的,光学纯度对熔喷PLA驻极非织造布的纤维平均直径和过滤效率没有影响;不同光学纯度PLA原料制备的熔喷非织造布都存在表面电压和过滤效率随放置时间延长而降低的现象,其中光学纯度较高的PLA原料制备的非织造布表面电压和过滤效率的保留率较高,捕获电荷能力更强;熔喷PLA驻极非织造布的结晶度和力学性能随退火时间的延长而提高,高光学纯度原料制备的驻极非织造布的力学性能增幅最大。

关键词：光学纯度退火结晶非织造布表面电压过滤效率

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The impact of radiotherapy on the prognosis of metastatic clear cell renal cell carcinoma after surgery

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Scientific Reports 2025年第1期15卷 1-11页

作者： li, xuwen Tan, Zhongyu Zhu, Yihao Zhai, Yabo Chen, Can Wang, Dong Wang, Mingshuai Xing, Nianzeng Yang, Feiya Ye, Xiongjun Department of Urology National Cancer Center National Clinical Research Center for Cancer/Cancer Hospital Chinese Academy of Medical Sciences and Peking Union Medical College Beijing China First Clinical Medical College Nanchang University Nanchang China Zunyi Medical University Zunyi China

Clear cell renal cell carcinoma, one of the most common types of renal cell carcinoma, has been increasing in incidence year by year. This study aims to investigate the impact of radiotherapy on the prognosis of patients with metastatic clear cell renal cell carcinoma (mccRCC) undergoing cytoreductive surgery. Clinical data of patients with mccRCC who underwent cytoreductive surgery were collected from the SEER database (2000–2021). This study employed propensity score matching (PSM) and R software to evaluate the overall survival (OS) of radiotherapy. Univariate and multivariate COX regression analyses were conducted to explore the impact of different variables on prognosis. Finally, a nomogram was developed to predict patient survival rates. A total of 2076 patients with mccRCC who underwent cytoreductive surgery were included in this study, with 538 (25.92%) in the radiotherapy group and 1539 (74.08%) in the non-radiotherapy group. After propensity score matching (PSM), there were 300 cases in each group. Kaplan-Meier values and the Cox proportional hazards model were used to plot the overall survival (OS) curves, which showed that the median survival time in the radiotherapy group was significantly lower than that in the non-radiotherapy group. Additionally, multivariate Cox regression analysis revealed that tumor grade, N stage, radiotherapy, lung metastasis, and liver metastasis were independent factors affecting the prognosis of patients with mccRCC undergoing cytoreductive surgery. Lastly, a nomogram was developed to estimate the survival rates of patients with mccRCC after cytoreductive surgery. Radiotherapy after cytoreductive surgery may have an adverse impact on the prognosis of patients with mccRCC. © The Author(s) 2025.

关键词： Metastatic clear cell renal cell carcinoma Overall survival Propensity score matching Radiotherapy Surgery

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Efficient Moiré pattern removal with lightweight multi-scale feature extraction

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JOURNAL OF ELECTRONIC IMAGING 2024年第2期33卷 023050-023050页

作者： li, xuwen Gan, Min Su, JianNan Chen, GuangYong Fuzhou Univ Coll Comp & Data Sci Fuzhou Peoples R China

In recent years, convolutional neural networks have excelled in image Moir & eacute;pattern removal, yet their high memory consumption poses challenges for resource-constrained devices. To address this, we propose the lightweight multi-scale network (LMSNet). Designing lightweight multi-scale feature extraction blocks and efficient adaptive channel fusion modules, we extend the receptive field of feature extraction and introduce lightweight convolutional decomposition. LMSNet achieves a balance between parameter numbers and reconstruction performance. Extensive experiments demonstrate that our LMSNet, with 0.77 million parameters, achieves Moir & eacute;pattern removal performance comparable to full high definition demoir & eacute;ing network (FHDe(2)Net) with 13.57 million parameters.

关键词： image demoir & eacute ing lightweight network information multi-distillation image restoration multi-scale feature extraction and fusion

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Yonarolide A, an unprecedented furanobutenolide-containing norcembranoid derivative formed by photoinduced intramolecular[2+2] cycloaddition

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Chinese Chemical Letters 2023年第2期34卷 420-424页

作者： Yeqing Du ligong Yao xuwen li Yuewei Guo School of Chinese Materia Medica Nanjing University of Chinese MedicineNanjing 210023China State Key Laboratory of Drug Research Shanghai Institute of Materia MedicaChinese Academy of SciencesShanghai 201203China Drug Discovery Shandong Laboratory Bohai Rim Advanced Research Institute for Drug DiscoveryYantai 264117China

Eight polycyclic furanobutenolide-containing norcembrane diterpenoids featuring C19 frameworks(1–8)were rapidly recognized and isolated from the Hainan soft coral Sinularia sp. by the HSQC-based small molecule accurate recognition technology. Yonarolide A(1a), featuring an unprecedented 5/6/4/4/7 pentacyclic ring skeleton, was surprisingly obtained as a transformed product by leaving compound 1 under indoor natural light, and was further proved to be a [2 + 2] cycloaddition product of 1 by photochemical reaction. The absolute stereochemistry of 1a and the three known norcembrane diterpenoids 1, 4, and7 were determined by using X-ray diffraction(XRD) analyses. Further, with the aid of XRD analysis, the structure of scabrolide B(2), which was previously reported of possessing 5/6/7 tricyclic skeleton, was firmly revised as 2a with the rare inelegane skeleton featured by the highly oxygenated 5/7/6 tricyclic carbocycle.

关键词： Soft coral Sinularia Norcembranoid Photocycloaddition SMART method

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Effects of total saponins from Panacis majoris Rhizoma and its degradation products on myocardial ischemia-reperfusion injury in rats

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BIOMEDICINE & PHARMACOTHERAPY 2020年 130卷 110538-110538页

作者： li, Min li, xuwen Zhou, limei Jin, Yongri Zhengzhou Univ Light Ind Coll Food & Biol Engn Zhengzhou 450000 Henan Peoples R China Jilin Univ Coll Chem 2699 Qianjin Rd Changchun 130012 Jilin Peoples R China Jilin Modern Chinese Med Engn & Res Ctr Co Ltd Changchun 130012 Jilin Peoples R China

Ethnopharmacological relevance: Panacis majoris Rhizoma, which is a member of herbal medicine, is known for many years to remove blood stasis, promote blood circulation, and enrich the blood. The active ingredients of this plant are mainly attributed to saponins. Aim of the study: The total saponins from Panacis majoris Rhizoma (TSPJ), and the degradation products of TSPJ (DTSPJ), were designed in this study to compare the protective effects on myocardial ischemia-reperfusion injury, and the aim of this approach is to discover more effective agents for the treatment of ischemic heart diseases. We analyzed the main constituents of TSPJ and DTSPJ, aiming to make clear which saponins played important roles in this protective effect, and also investigated the possible mechanisms. Materials and methods: DTSPJ was prepared by the method of alkaline hydrolysis. High performance liquid chromatography (HPLC) were used to analyze the main chemical constituents of TSPJ and DTSPJ, which were isolated by chromatographic techniques and identified by comparison with the Nuclear Magnetic Resonance (NMR) data in reported literature. Male Wistar rats were randomized to sham-operated group, ischemia-reperfusion group, three TSPJ (50, 100 and 200 mg/kg) groups, three DTSPJ (50, 100 and 200 mg/kg) groups, and isosorbide dinitrate tablet (5.0 mg/kg) group. The rats in all groups were intragastrically administrated once per day for three successive days. The establishment of the model of myocardial ischemia-reperfusion injury was used the following method: firstly, the left coronary artery of experimental rat was ligated for 30 min and then reperfused for 120 min. Then the myocardial infarct size, hemorheological and biochemical parameters, whole blood viscosity, plasma viscosity, platelet adhesion rate, platelet aggregation and histopathology changes were assessed. Results: Five C-3,C-28-bidesmosidic oleanane-type saponins and ginsenoside Rd were the main constituents of TSPJ, and their

关键词： Panacis majoris Rhizoma Myocardial ischemia-reperfusion Total saponins Degradation products

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Study On Vehicle Video Blackbox with Acceleration Sensitive Function

Study On Vehicle Video Blackbox with Acceleration Sensitive ...

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International Conference on MultiMedia and Information Technology

作者： Wu, Qiang Jia, Kebin li, xuwen Beijing Univ Technol Coll Elect & Control Engn Beijing Peoples R China Beijing Univ Technol Coll Life Sci & Bioengn Beijing Peoples R China

ISBN: (纸本)9780769535562

This paper studies on a new type vehicle video blackbox with acceleration sensitive function. Different with common blackbox on car, the system can record and store the analog video to H.264 bi stream files when acceleration exceeds the limitation value. The acceleration sensitive algorithm is derived. Experiments and calibration results are also given.

关键词： blackbox accelerometer H.264 video compression

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Polynomial Analysis of DH Secrete Key and Bit Security

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Wuhan University Journal of Natural Sciences 2005年第1期10卷 239-242页

作者： JIANGZheng-tao xuwen-li WANGYu-min NationalKeyLaboratoryofIntegratedServiceNetworksXidianUniversity Xi＇an710071ShaanxiChina

In this paper, we lower the upper bound of the number of solutions of oracletransformation polynomial F(x) over GF(q) So one can also recover all the secrete keys with fewercalls We use our generalized ' even-and-odd test' method to recover the least significant p-adic'bits' of representations of the Lucas Cryptosystem secret keys x Finally, we analyze the EfficientCompact Subgroup Trace Representation (XTR) Diffic-Hellmen secrete keys and point out that if theorder of XIR-subgroup has a specialform then all the bits of the secrete key of XIR ean be recoveredform any bit of the exponent x.

关键词： public-key cryptosystem security analysis polynomial transformation bitsecurity Diffie-Hellman oracle

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Research on Image Matching Algorithm Based on Local Invariant Features

Research on Image Matching Algorithm Based on Local Invarian...

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9th International Conference on Intelligent Information Hiding and Multimedia Signal Processing (IIH-MSP)

作者： liu, Jiaqi Wu, Qiang li, xuwen Beijing Univ Technol Coll Elect Informat & Control Engn Beijing Peoples R China Beijing Univ Technol Coll Life Sci & Bioengn Beijing Peoples R China

ISBN: (纸本)9780769551203

As an important foundation for image-guided technology, image matching technique is the key technology of modern war. This paper proposes a new algorithm of affine invariant detector and descriptor of local invariant feature points, starting from feature point detection and description point of view, making up the traditional feature point extraction defects of small number and types. Meantime, proposes an improved similarity measure method based on the previously proposed new feature point detection and description algorithm, it improves the matching accuracy and real-time performance. Finally, compares the experiment results of SURF, SIFT and the improved algorithm proposed in this paper, the experimental results shows that the feature points extracted by the improved algorithm has fully affine invariance, and improved the accuracy and speed of image matching algorithm efficiently.

关键词： local invariant feature affine invariance image matching

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Iron tetrasulfophthalocyanine functionalized graphene as a platinum-free cathodic catalyst for efficient oxygen reduction in microbial fuel cells

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JOURNAL OF POWER SOURCES 2012年 197卷 93-96页

作者： Zhang, Yezhen Mo, Guangquan li, xuwen Ye, Jianshan S China Univ Technol Sch Chem & Chem Engn Guangzhou 510641 Guangdong Peoples R China

Noncovalent functionalization of graphene with iron tetrasulfophthalocyanine (FeTsPc) is achieved not only to prevent the aggregation of graphene but also form an efficient electrocatalyst for the oxygen reduction reaction (ORR) in a dual-chamber microbial fuel cell (MFC). The electrochemical activity of the FeTsPc-functionalized graphene (FeTsPc-graphene) is evaluated towards the ORR using cyclic voltammogram (CV) and linear sweep voltammogram (LSV) methods. More positive peak potential and larger peak current of ORR are found using FeTsPc-graphene electrode as compared to FeTsPc electrode, suggesting enhanced activity of FeTsPc after adsorbing on graphene surface. The maximum power density of 817 mW m(-2) obtained from the MFC with a FeTsPc-graphene cathode is higher than that of 523 mW m(-2) with a FeTsPc cathode and is close to that of 856 mW m(-2) with a Pt/C cathode. Thus, FeTsPc-graphene nanocomposites can be a good alternative to Pt catalyst in MFCs. (C) 2011 Elsevier B.V. All rights reserved.

关键词： Graphene Microbial fuel cell Iron tetrasulfophthalocyanine Oxygen reduction reaction

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