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航空制造技术 2001年第1期44卷 61-63页

作者：任瑞靳耿栓郭秀梅西安飞机工业(集团)有限责任公司

介绍了MDYB - 3座舱盖玻璃胶接端面裂纹的特征 ,通过试验确定了裂纹产生的原因。

关键词： MDYB-3 定向有机玻璃飞机座舱盖胶接端面裂纹

Changes in the Water Area of Chahannaoer and Its Influencing Factors from 1986 to 2020

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Meteorological and Environmental Research 2022年第1期13卷 73-78,83页

作者： Nan ZHAO Yan HUANG ruiqi YAN Xiaoli guo Dan ZHANG Fujiang ren Ulanqab Meteorological Bureau Ulanqab 012000China

Based on the long-term Landsat remote sensing data,the dynamic changes in the water area of Chahannaoer from 1986 to 2020 were analyzed,and the influencing factors of lake changes were analyzed combined with meteorological data and human *** results show that in the past 35 years,the water area of Chahannaoer tended to reduce obviously on the whole;annual average evaporation and annual average relative humidity gradually decreased,and annual average temperature,annual average precipitation,and annual average wind speed *** and relative humidity were significantly positively correlated with water area;temperature and average wind speed were negatively correlated with water area,but the correlation was not significant;there was a weak correlation between evaporation and water *** and relative humidity were the main climatic factors affecting the change of water area in Chahannaoer.

关键词： Water area Influencing factors Chahannaoer

Efficacy of cattle encephalon glycoside and ignotin in patients with acute cerebral infarction: a randomized, double-blind, parallel-group, placebo-controlled study

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Neural Regeneration Research 2020年第7期15卷 1266-1273页

作者： Hui Zhang Chuan-Ling Li Feng Wan Su-Juan Wang Xiu-E Wei Yan-Lei Hao Hui-Lin Leng Jia-Min Li Zhong-rui Yan Bao-Jun Wang ren-Shi Xu Ting-Min Yu Li-Chun Zhou Dong-Sheng Fan Department of Neurology Peking University Third HospitalBeijingChina Department of Neurology Xuzhou Central HospitalXuzhouJiangsu ProvinceChina Department of Neurology Huang Gang Central HospitalHuanggangHubei ProvinceChina Department of Neurology The First People's Hospital of Luoyang CityLuoyangHenan ProvinceChina Department of Neurology General Hospital of Xuzhou Mining GroupXuzhouJiangsu ProvinceChina Department of Neurology Affiliated Hospital of Jining Medical UniversityJiningShandong ProvinceChina Department of Neurology People's Hospital of Yichun CityYichunJiangxi ProvinceChina Department of Neurology The First Hospital of Shijiazhuang CityShijiazhuangHebei ProvinceChina Department of Neurology Jining No.1 People's HospitalJiningShandong ProvinceChina Department of Neurology Baotou Central HospitalBaotouInner Mongolia Autonomous RegionChina Department of Neurology Jiangxi Provincial People's HospitalAffiliated People's Hospital of Nanchang UniversityNanchangJiangxi ProvinceChina Department of Neurology The Second Hospital of Jilin UniversityChangchunJilin ProvinceChina Department of Neurology Beijing Chao-Yang HospitalCapital Medical UniversityBeijingChina

Cattle encephalon glycoside and ignotin(CEGI)injection is a compound preparation formed by a combination of muscle extract from hea lthy rabbits and brain gangliosides from cattle,and it is generally used as a neuroprotectant in the treatment of central and peripheral nerve ***,there is still a need for high-level clinical evidence from large samples to support the use of *** therefore carried out a prospective,multicenter,randomized,double-blind,parallel-group,placebo-controlled study in which we recruited 319 patients with acute cerebral infarction from 16 centers in China from October 2013 to May *** patients were randomized at a 3:1 ratio into CEGI(n=239;155 male,84 female;61.2±9.2 years old)and placebo(n=80;46 male,34 female;63.2±8.28 years old)*** patients were given standard care once daily for 14 days,including a 200 mg aspirin enteric-coated tablet and 20 mg atorvastatin calcium,both taken orally,and intravenous infusion of 250–500 mL 0.9%sodium chloride containing 40 mg sodium tanshinone IIA *** on conventional treatment,patients in the CEGI and placebo groups were given 12 mL CEGI or 12 mL sterile water,respectively,in an intravenous drip of 250 mL 0.9%sodium chloride(2 mL/min)once daily for 14 *** to baseline National Institutes of Health Stroke Scale scores,patients in the two groups were divided into mild and moderate *** on the modified Rankin Scale results,the rate of patients with good outcomes in the CEGI group was higher than that in the placebo group,and the rate of disability in the CEGI group was lower than that in the placebo group on day 90 after *** the CEGI group,neurological deficits were decreased on days 14 and 90 after treatment,as measured by the National Institutes of Health Stroke Scale and the Barthel *** analysis revealed that CEGI led to more significant improvements in moderate stroke *** drug-related adverse events occurred in the CEGI or

关键词： acute cerebral infarction Barthel Index cattle encephalon glycoside and ignotin modified Rankin Scale National Institutes of Health Stroke Scale neuroprotectants recovery rate stroke

A predictive model for ischemic colitis:Integrating clinical and laboratory parameters

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iLABMED 2024年第3期2卷 157-167页

作者： Chonghui Hu Xiuying Zhao Bo Jiang Xuan Jiang Yutang ren Jiaojiao guo Beijing Tsinghua Changgung Hospital School of Clinical MedicineTsinghua UniversityBeijingChina

Objective:We aimed to develop a predictive model for the clinical diagnosis of ischemic colitis(IC).Methods:Clinical data were collected from patients with acute IC lesions who were diagnosed and admitted to Beijing Tsinghua Changgung Hospital from January 2016 to December *** patients were included in the IC case group in this retrospective observational *** control group comprised patients aged≥40 years who were diagnosed with abdominal pain during the same period,excluding those with *** patients were divided into a training and test sets based on the time *** absolute shrinkage and selection operator regression was used to screen risk factors for the occurrence of *** stepwise regression(maximum likelihood ratio method)was performed in multifactorial analysis,and a diagnostic prediction model for IC was established using R *** area under the receiver operating characteristic(ROC)curve(AUC)was examined to assess differentiation using working ROC *** used bootstrap resampling(1000 times)for internal *** calibration curves and decision curve analysis(DCA)were also ***:Our study indicates that constipation,hematochezia,neutrophil counts,and specific abdominal computed tomography(CT)(plain scan)findings,including intestinal wall edema and thickening,intestinal lumen stenosis,and dilation,are independent predictors of *** predictive model exhibited high discriminative ability with an AUC of 0.9788 in the training set,and the calibration and DCA curves demonstrated excellent model *** validation,the AUC remained robust at 0.9868,underscoring the model's reliability in predicting ***:According to our model,constipation accompanied by hematochezia necessitates careful consideration of *** CT(plain scan)is an effective diagnostic tool for IC,and it is common for patients to exhibit elevated neutrophil *** predictive model,demonstrating high discriminative ab

关键词： clinical features ischemic colitis risk factors

Identification of a Putative Tetrasporophyte-Specific Gene in Gracilaria lemaneiformis(Gracilariales,Rhodophyte)

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Journal of Ocean University of China 2008年第3期7卷 299-303页

作者： ren Xueying ZHANG Xuecheng College of Marine Life Sciences Ocean University of China Qingdao 266003 P. R. China

A putative tetrasporophyte-specific gene,designated as SSH466(GenBank accession No. DQ019223) ,was one of the genes identified in this work using suppression subtractive hybridization(SSH) method in Gracilaria lemaneiformis. The full length of the gene was obtained using SMART RACE strategy. Sequence analysis revealed that the gene had 1 019 nucleotides,including an open reading frame of 498 nucleotides encoding 166 amino acid residues,158 nucleotides of 5' untranslated region and 363 nucleotides of 3' non-coding region. Protein motif and secondary structure prediction showed that there existed a transmembrane domain with a unique β-sheet. Thus,SSH466 protein might be a cross-membrane protein. Sequence homology search in the public GenBank databases did not reveal any significant match with SSH466. Virtual Northern blot analysis confirmed that it was a tetrasporophyte-specific gene.

关键词： suppression subtractive hybridization (SSH) tetrasporophyte female gametophyte Virtual Northern blot

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三种度量向量组数值线性相关性方法的关系

中国石油大学学报（自然科学版） 2010年第1期34卷 175-179页

作者：张华仁李维国中国石油大学数学与计算科学学院山东东营257061 中国科学院青岛生物能源与过程研究所山东青岛266101

讨论度量向量组的相对相关性指标、线性相关指标和最小相对范数指标。证明线性相关性指标和相对相关性指标的等价性,并建立最小相对范数指标与线性相关性指标的关系表达式。应用实例结果验证了所得结论的正确性。

关键词：数值线性相关性 Gram行列式秩

Potassium ion pre‑intercalated MnO_(2)for aqueous multivalent ion batteries

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Frontiers of Optoelectronics 2023年第4期16卷 81-89页

作者： Zikang Xu ruiqi ren Hang ren Jingyuan Zhang Jinyao Yang Jiawen Qiu Yizhou Zhang guoyin Zhu Liang Huang Shengyang Dong School of Environmental Science and Engineering School of Chemistry and Materials ScienceNanjing University of Information Science and TechnologyNanjing 210044China Wuhan National Laboratory for Optoelectronics School of Optical and Electronic InformationHuazhong University of Science and TechnologyWuhan 430074China

Manganese dioxide(MnO_(2)),as a cathode material for multivalent ion(such as Mg^(2+)and Al^(3+))storage,is investigated due to its high initial ***,during multivalent ion insertion/extraction,the crystal structure of MnO_(2)partially collapses,leading to fast capacity decay in few charge/discharge ***,through pre-intercalating potassium-ion(K+)intoδ-MnO_(2),we synthesize a potassium ion pre-intercalated MnO_(2),K_(0.21)MnO_(2)·0.31H_(2)O(KMO),as a reliable cathode material for multivalent ion *** as-prepared KMO exhibits a high reversible capacity of 185 mAh/g at 1 A/g,with considerable rate performance and improved cycling stability in 1 mol/L MgSO_(4)*** addition,we observe that aluminum-ion(Al^(3+))can also insert into a KMO *** work provides a valid method for modifcation of manganesebased oxides for aqueous multivalent ion batteries.

关键词： Aqueous batteries Multivalent ion batteries Magnesium ion Aluminum ion MnO_(2)

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二维粗糙面的多次散射和遮蔽效应研究

系统工程与电子技术 2006年第4期28卷 495-497,504页

作者：任玉超郭立新西安电子科技大学理学院陕西西安710071

利用基尔霍夫近似研究了表面均方根斜率较大的二维粗糙面的多次散射问题。在多次散射理论中,随机粗糙面的总散射功率不仅与单次散射波有关,而且还取决于多次散射波。通过将格林函数做平面波展开的方法,二阶散射系数分解成与同向波和反... 详细信息

利用基尔霍夫近似研究了表面均方根斜率较大的二维粗糙面的多次散射问题。在多次散射理论中,随机粗糙面的总散射功率不仅与单次散射波有关,而且还取决于多次散射波。通过将格林函数做平面波展开的方法,二阶散射系数分解成与同向波和反向波有关的两部分,同向和反向分别是按单次散射场和其共轭场的耦合方式而划分的两种不同情况。引入考虑多次散射的遮蔽函数来修正掠入射情况下的散射系数,并将计算范围扩展到均方根斜率各向异性的二维粗糙面。将考虑多次散射的数值计算结果与前后向迭代方法的数值结果做了比较,两种方法的计算结果基本一致。

关键词：粗糙面多次散射遮蔽函数

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求解一维无约束优化问题的高阶收敛方法

中国石油大学学报（自然科学版） 2010年第3期34卷 174-176页

作者：张华仁李维国中国石油大学数学与计算科学学院山东东营257061 中国科学院青岛生物能源与过程研究所山东青岛266101

提出一种新的求解一维无约束优化问题的高阶收敛方法,并给出其收敛性的证明。在迭代公式的推导过程中,使用目标函数f(x)的泰勒展式来近似其三阶导数。数值试验结果表明方法是有效的。

关键词：无约束优化一维优化 Taylor展式高阶收敛数值试验

Three-dimensional guidance method for air to ground missile with impact time constraint

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Three-dimensional guidance method for air to ground missile ...