检索结果-南通市图书馆

Role of triggering receptor expressed on myeloid cells 1/2 in secondary injury after cerebral hemorrhage

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2025年第9期13卷 1-12页

作者： fan yi Hao Wu Hai-Kang Zhao Xi’an Medical University Xi’an 710021Shaanxi ProvinceChina Department of Neurosurgery The Second Affiliated Hospital of Xi’an Medical UniversityXi’an 710038Shaanxi ProvinceChina

Intracerebral hemorrhage(ICH)is a common severe emergency in neurosurgery,causing tremendous economic pressure on families and society and devastating effects on patients both physically and psychologically,especially among patients with poor functional *** is often accompanied by decreased consciousness and limb *** seriously affects patients’ability to live *** rapid advances in neurosurgery have greatly improved patient survival,there remains insufficient evidence that surgical treatment significantly improves long-term *** in-depth pathophysiological studies after ICH,increasing evidence has shown that secondary injury after ICH is related to long-term prognosis and that the key to secondary injury is various immune-mediated neuroinflammatory reactions after *** basic and clinical studies of various systemic inflammatory diseases,triggering receptor expressed on myeloid cells 1/2(TREM-1/2),and the TREM receptor family is closely related to the inflammatory *** inflammatory diseases can be upregulated and downregulated through receptor *** the TREM receptor functions after ICH,the types of results from intervention,and whether the outcomes can improve secondary brain injury and the long-term prognosis of patients are *** analysis of relevant research results from basic and clinical trials revealed that the inhibition of TREM-1 and the activation of TREM-2 can alleviate the neuroinflammatory immune response,significantly improve the long-term prognosis of neurological function in patients with cerebral hemorrhage,and thus improve the ability of patients to live independently.

关键词： Cerebral hemorrhage Secondary injury Triggering receptor expressed on myeloid cells 1/2 Neurosurgery Inflammatory response

Improvement of the Bayesian neural network to study the photoneutron yield cross sections

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2022年第11期33卷 1-9页

作者： Yong-yi Li fan Zhang Jun Su Department of Computing Changzhi UniversityChangzhi 046011China Department of Physics Changzhi UniversityChangzhi 046011China Sino-French Institute of Nuclear Engineering and Technology Sun Yat-sen UniversityZhuhai 519082China

This work is an attempt to improve the Bayesian neural network (BNN) for studying photoneutron yield cross sections as a function of the charge number Z, mass number A, and incident energy ε. The BNN was improved in terms of three aspects:numerical parameters, input layer, and network structure. First, by minimizing the deviations between the predictions and data, the numerical parameters, including the hidden layer number, hidden node number, and activation function, were selected. It was found that the BNN with three hidden layers, 10 hidden nodes, and sigmoid activation function provided the smallest deviations. Second, based on known knowledge,such as the isospin dependence and shape effect, the optimal ground-state properties were selected as input neurons. Third, the Lorentzian function was applied to map the hidden nodes to the output cross sections, and the empirical formula of the Lorentzian parameters was applied to link some of the input nodes to the output cross sections. It was found that the last two aspects improved the predictions and avoided overfitting, especially for the axially deformed nucleus.

关键词： Bayesian neural network Photoneutron cross sections Giant dipole resonance

Three dimensional modeling method of MIMICS adjacent mask spherical open cell aluminum foam-polyurethane composites based on DICOM data

在线全文

学校读者我要写书评

暂无评论

China Foundry 2020年第4期17卷 314-319页

作者： Ming-si Qi Wei Zhang guang-ming Ren yi-ping yin fan Zhang Chun-xue Lu North University of China Taiyuan 030051China Taiyuan Heating Power Groups Co. Ltd.Taiyuan 030001China Baotou North Hua'an Real Estate Co. Ltd.Baotou 014030China

The complexity and irregularity of the internal structure of aluminum foam and the particularity of the fabricating method make it difficult to establish a three-dimensional model that can accurately reflect the internal structure of aluminum foam-polyurethane composites. This study presents a method of three-dimensional reconstruction of the Materialise's Interactive Medical Image Control System (MIMICS) adjacent mask based on Digital Imaging and Communications in Medicine (DICOM) data. Firstly, spherical open cell aluminum foam-polyurethane composites with different pore sizes (5 mm, 7 mm, 9 mm) were prepared. Then the corresponding DICOM data of the spherical open cell aluminum foam-polyurethane composites were obtained by CT-scan. Based on adjacent mask, the three-dimensional simulation model of spherical open cell aluminum foam-polyurethane composites was successfully reconstructed in MIMICS. In order to verify the feasibility of this modeling method, a quasi-static compression simulation of the three-dimensional simulation model was carried out by ABAQUS, and the simulated stress-strain curves were acquired. The quasi-static compression experiments were performed on the prepared aluminum foam-polyurethane composites, and the experimental nominal stress-strain curves were obtained. The simulated nominal stress-strain curves were compared with the experimental nominal stress-strain curves. Results show that the two curves are basically the same. The feasibility and accuracy of the three-dimensional modeling method for the aluminum foam-polyurethane composites are verified.

关键词： aluminum foam-polyurethane CT-scan quasi-static compression 3D modeling simulation

Influences of enteral nutrition combined with probiotics on gut microflora and barrier function of rats with abdominal infection

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2006年第27期12卷 4352-4358页

作者： Tong-yi Shen Huan-Long Qin Zhi-guang Gao Xiao-Bing fan Xiao-Ming Hang Yan-Qun Jiang Department of Surgery Shanghai Sixth People's Hospital Affiliated to Shanghai Jiaotong University Shanghai 200233 China

AIM： To investigate the influences of enteral, parenteral nutrition and probiotics delivered by gut on intestinal microecology, epithelial tight junctions, immune and barrier function of rats with abdominal infection. METHODS： Rat abdominal infection models established with cecal ligation and perforation method, were divided into three groups： parenteral nutrition （PN group, n = 7）, PN＋enteral nutrition （EN group, n = 7） and PN ＋ EN ＋ probiotics （probiotics group, n = 7） via the needle jejunostomy and neck vein for five days. The total nutritional supplement of the three groups was isonitrogenic and isocaloric. Probiotics was delivered by jejunostomy 10 mL/d （1 x 10^8 cfu/mL）. The rats were killed on the sixth day. The feces in the cecum were cultured for anaerobic bacterial growth and analyzed with bacterial group DNA fingerprint profile with random amplified polymorphic DNA. The transmembrane binding proteins （occludin） and IgA level in plasma cells of intestine epithelium in colon and terminal ileum were measured by an immunohistochemistry method. The ultrastructure of intestinal epithelial tight junctions in colon and small intestine was observed by electronmicroscopy. Vena cava blood and the homogenated tissue of liver, lung and mesenteric lymph nodes were cultured to determine the bacterial translocations, and endotoxin in the blood from portal vein was detected. RESULTS：（1） The amount of bacteria of gut species in EN group and probiotic group was higher than that in PN group. The DNA-proflles in EN group and probiotic group were similar to that of normal rats. The number of DNAprofiles in probiotics group was much more than that in PN group and EN group. Moreover, there were strange stripes in PN group. （2） The expression of occludin and IgA in the small and large intestine in EN group （2.309 ± 0.336, 15.440 ± 2.383） and probiotic group （2.938 ± 0.515, 16.230 ± 3.183） was improved as compared with PN group （1.207 ± 0.587, P 〈 0.05, 11.189 ± 2.108, P 〈 0.

关键词： Probiotics Enteral nutrition Gut flora Transmembrane binding proteins Gut barrier function

Visualization Analysis for Business Performance of Chinese Listed Companies Based on Gephi

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2020年第5期63卷 959-977页

作者： guang Sun Hongzhang Lv Dianyu Wang Xiaoping fan yi Zuo Yanfei Xiao Xu Liu Wenqian Xiang Ziyi Guo Institute of Big Data Hunan University of Finance and EconomicsChangsha410205China Housheng School of International Education Hunan University of Finance and EconomicsChangsha410205China School of Information Science and Engineering Central South UniversityChangsha410075China School of Finance and Economics Hunan University of Finance and EconomicsChangsha410205China

When conducting company performance evaluations,the traditional method cannot reflect the distribution characteristics of the company’s operating conditions in the entire securities *** is an efficient tool for data analysis and visualization in the era of big *** can convert the evaluation results of all listed companies into nodes and edges,and directly display them in the form of graphs,thus making up for the defects of traditional *** paper will take all the listed companies in the Shanghai and Shenzhen Stock Exchange as the analysis *** uses tushare and web crawlers to collect the financial statement data of these *** then,uses the Economic Value Added model to calculate the EVA of each listed company and build graph ***,import the graph data into gephi to generate the distribution graph of all listed companies’performance,and summarize the distribution characteristics of business ***,select a listed company that you want to analyze in detail,using the traditional DuPont analysis method to conduct micro level visualization analysis of the business performance to find the main factors affecting the company’s operating *** gephi into traditional performance analysis methods will make the results of traditional analytical methods more effective and complete.

关键词： EVA gephi visualization graph analysis business performance evaluation

Therapeutic effects of different durations of acupuncture on rats with middle cerebral artery occlusion

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2015年第1期10卷 159-164页

作者： Chao Zhang Yan Wen Xiao-nong fan guang Tian Xue-yi Zhou Shi-zhe Deng Zhi-hong Meng First Teaching Hospital of Tianjin University of Traditional Chinese Medicine Post-graduate School Tianjin University of Traditional Chinese Medicine Acupuncture and Moxibustion Research Institute of Tianjin University of Traditional Chinese Medicine Key Laboratory of Cerebropathy Acupuncture Therapy of State Administration of Traditional Chinese Medicine Tianjin Key Laboratory of Acupuncture & Moxibustion Science Three-level Laboratory of Acupuncture Dose-Effect Relationship State Administration of Traditional Chinese Medicine

Acupuncture is regarded as an effective therapy for cerebral ischemia. Different acupuncture ma- nipulations and durations may result in different therapeutic effects. In the present study, the Neig uan （PC6） acupoint of rats with occluded middle cerebral arteries was needled at a fixed frequency （3 Hz） with different durations, i.e., 5, 60 and 180 seconds under a twisting-rotating acupuncture method. Results showed that different durations of acupuncture had different therapeutic effects, with 60 seconds yielding a better therapeutic effect than the other two groups. This duration of treatment demonstrated rapid cerebral blood flow, encouraging recovery of neurological function, and small cerebral infarct volume. Experimental findings indicated that under 3 Hz frequency, the treatment of needling Neiguan for 60 seconds is effective for ischemic stroke.

关键词： nerve regeneration middle cerebral artery occlusion manipulation Neiguan cerebralinfarction volume twisting-rotating method duration frequency cerebral blood flow neural regeneration

A Novel Medium Access Control for Ad hoc Networks Based on OFDM System

在线全文

学校读者我要写书评

暂无评论

The Journal of China Universities of Posts and Telecommunications 2005年第2期12卷 6-12页

作者： YU yi-fan yiN Chang-chuan YUE guang-xin School of Telecommunications Engineering Beijing University of Posts and Telecommunications Beijing 100876 P.R. China

Recently, hosts of Medium Access Control （MAC） protocols for Ad hoc radio networks have been proposed to solve the hidden terminal problem and exposed terminal problem. However most of them take into no account the interactions between physical （PHY） system and MAC protocol. Therefore, the current MAC protocols are either inefficient in the networks with mobile nodes and fading channel or difficult in hardware implementation. In this paper, we present a novel media access control for Ad hoc networks that integrates a media access control protocol termed as Dual Busy Tone Multiple Access （DBTMA） into Orthagonal Frequency Division Multiplexing （ OFDM ） system proposed in IEEE 802.11 a standard. The analysis presented in the paper indicates that the proposed MAC scheme achieves performance improvement over IEEE 802.11 protocol about 25% -80% especially in the environment with high mobility and deep fading. The complexity of the proposed scheme is also lower than other implementation of similar busy tone solution. Furthermore, it is compatible with IEEE 802. 11a networks.

关键词： DBTMA OFDM medium access control 802. lla Ad hoc

A pixel-level local contrast measure for infrared small target detection

在线全文

学校读者我要写书评

暂无评论

Defence Technology（防务技术） 2022年第9期18卷 1589-1601页

作者： Zhao-bing Qiu Yong Ma fan fan Jun Huang Ming-hui Wu Xiao-guang Mei School of Electronic Information and the School Aerospace Research Wuhan UniversityWuhan430074China

Infrared(IR) small target detection is one of the key technologies of infrared search and track(IRST)systems. Existing methods have some limitations in detection performance, especially when the target size is irregular or the background is complex. In this paper, we propose a pixel-level local contrast measure(PLLCM), which can subdivide small targets and backgrounds at pixel level *** pixel-level segmentation, the difference between the target and the background becomes more obvious, which helps to improve the detection performance. First, we design a multiscale sliding window to quickly extract candidate target pixels. Then, a local window based on random walker(RW) is designed for pixel-level target segmentation. After that, PLLCM incorporating probability weights and scale constraints is proposed to accurately measure local contrast and suppress various types of background interference. Finally, an adaptive threshold operation is applied to separate the target from the PLLCM enhanced map. Experimental results show that the proposed method has a higher detection rate and a lower false alarm rate than the baseline algorithms, while achieving a high speed.

关键词： Infrared(IR)small target Irregular size Random walker(RW) Pixel-level local contrast measure(PLLCM)

A cross-layer scheme for medium access control with QoS guaranteeing for Ad hoc networks

在线全文

学校读者我要写书评

暂无评论

The Journal of China Universities of Posts and Telecommunications 2006年第3期13卷 43-49页

作者： YU yi-fan yiN Chang-chuan YUE guang-xin School of Telecommunications Engineering Beijing University of Posts and Telecommunications Beijing 100876 China

Ample medium access control （MAC） protocols for Ad hoc networks have been proposed. However, most oal （PHY） layer and the MAC layers. Therefore, their efficiencf them do not take into account the interactions between the physicy and feasibility are greatly limited. In this article, we present a novel MAC protocol for Ad hoc networks according to the idea of cross-layer design. The proposed protocol combines an MAC protocol termed dual busy tone multiple access （DBTMA） with Orthogonal frequency division multiplexing （OFDM） system in IEEE 802.1 la standard. The analysis showed that the proposed protocol provides higher throughput and is more flexible than previous MAC protocols. In addition, it can provide Quality of Service（QoS） guarantee to the packets with different delay requirements in the presence of hidden terminals.

关键词： DBTMA OFDM IEEE 802.11a MAC Cross-layer