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| 1 | Synergistic effects of elevated homocysteine level and abnormal blood lipids on the onset of stroke显示文摘Hyperhomocysteinemia and abnormal blood lipids are independent risk factors for stroke.However,whether both factors exert a synergistic effect in the onset of stroke remains unclear.The present study is a retrospective analysis of 2 089 cases of stroke and 2 089 control cases of simple intervertebral disk protrusion using a paired multivariate logistic regression method.Adjusting for known confounding variables including the patients’age,gender,smoking status,alcohol consumption status,patient and family medical history,and clinical biochemical indices,elevated homocysteine level was related to the onset of stroke.Patients with elevated homocysteine levels and abnormal blood lipids showed a 40.9%increase in the risk for stroke compared to patients with normal homocysteine levels and blood lipids(odds ratio 1.409;95%confidence interval1.127–1.761).These results indicate that elevated homocysteine and abnormal blood lipids exert synergistic effects in the onset of stroke.Patients with elevated homocysteine levels and abnormal blood lipids are predisposed to stroke. | Lu Hao Liming Chen Xiaoyong Sai Zhefeng Liu Guang Yang Rongzeng Yan Lili Wang Caiyun Fu Xuan Xu Zhenzhen Cheng Qiang Wu Shuzhang Li | 2013 | Neural Regeneration Research2013，8，31： | 9 |
| 2 | On the order of the high - dimensional Cochrane sum and its mean value显示文摘 | Xu Zhefeng Zhang Wenpeng | 2006 | Journal of Number Theory2006，117，1： | 1 |
| 3 | On the Mean Value of the Smarandache Power Function显示文摘 | Xu Zhefeng | 2006 | ACTA MATHE-MATICA SINICA(Chinese series)2006，49，1： | 1 |
| 4 | Proposal for All-Optical Switchable and Tunable Ultrawideband Monocycle Generation Utilizing SOA Wavelength Conversion and Time Delay显示文摘基于在一个半导体的波长变换,光放大器(SOA ) 和在光延期的光悦耳的延期衬里的一个所有光的 ultrawideband 独轮脚踏车发电机(ODL ) 被建议并且模仿。系统完成在脉搏极性光学地可切换、在 pulsewidth 和收音机频率(RF ) 悦耳光谱。 | Zhefeng HU Jianhui XU Min HOU | 2017 | Photonic Sensors2017，7，1： | 1 |
| 5 | On the Smarandache func- tion and square complements 显示文摘 | Zhang Wenpeng and Xu Zhefeng | 2005 | Scieutia Magua2005，2，： | 1 |
| 6 | On the order of the high-dimensional Cochrane sum and its mean value 显示文摘 | Xu Zhefeng Zhang Wenpeng | 2006 | Journal ofNumber Theory2006，117，： | 1 |
| 7 | A note on the 2k - th power mean of character sums over the quarter interval显示文摘 | Xu Zhefeng | 2008 | Proceedings of American Mathematical Society2008，136，： | 1 |
| 8 | On the order of the high - dimensional Cochrane sum and its mean value 显示文摘 | Xu Zhefeng Zhang Wenpeng | 2006 | J Number Theory2006，117，1： | 1 |
| 9 | On the k-full number sequences显示文摘 | XU Zhefeng | 2004 | Smarandache Notions Journal2004，14，： | 1 |
| 10 | Some arithmetical properties of primitive mumbers of power p显示文摘 | Xu Zhefeng | 2006 | Scientia Magna2006，2，1： | 1 |
| 11 | On the order of the high-dimensional Cochrane sum and its mean value显示文摘 | XU Zhefeng ZHANG Wenpeng | 2006 | J Number Theory2006，117，1： | 1 |
| 12 | On the mean value of the two-term exponential sums with Diriehlet characters 显示文摘 | Xu Zhefeng Zhang Tianping Zhang Wenpeng | 2007 | Journal of Number Theory2007，123，2： | 1 |
| 13 | Ureteral reconstruction with decellularized small intestinal submucosa matrix for ureteral stricture: A preliminary report of two cases显示文摘Objective:To determine the feasibility of decellularized small intestinal submu-cosa(5IS)matrix in repairing ureteral strictures.Methods:Two patients with ureteral stenoses underwent ureteral reconstruction with SIS ma-trix at the Zhejiang Provincial Corps Hospital of Chinese People's Armed Forces between June 2014 and June 2016.The ureteral stenoses were repaired with a semi-tubular SIS matrix and the postoperative recoveries were observed.Results:Both operations were successfully completed.The average operative time was 90 min and the average length of hospital stay was 15 days.No fevers,incision infections,intestinal obstruction,graft rejection,or other serious complications were noted.After 2 months,ure-teroscopic examinations showed that the surfaces of the original patches were covered by mu-Cosa and there were no apparent stenoses in the lumens.The ureteral stents were replaced every 2 months postoperatively and removed 12 months postoperatively.No infections or uri-nary leakage occurred after removal of the stents.Intravenous urography was performed 6 and 12 months postoperatively.The results showed that the ureters were not obstructed and there was no apparent stenosis at the anastomosis sites.The average follow-up time was>12 months.Long-term follow-up is still ongoing,and computed tomography examin ations of the urinary tract have been conducted in the outpatient department of our hospital 1,3,and 6 months after removal of the double-J stents,suggesting the absence of hydronephrosis.The serum creatinine levels remained stable during the follow-up.Conclusion:SIS matrix reconstruction is a feasible method to repair ureters stenosis. | Qingkang Xu Chen Chen Zhefeng Xu Feng Chen Yongtao Yu Xiang Hong Shengli Xu Jiajia Chen Qin Ding Hong Chen | 2020 | Asian Journal of Urology2020，7，1： | 1 |
| 14 | Wear-resistant Ag-MAX phase 3D interpenetrating-phase composites:Processing,structure,and properties显示文摘Electrical contact materials are generally Ag-or Cu-based composites and play a critical role in ensuring the reliability and efficiency of electrical equipments and electronic instruments.The MAX(M is an early transition metal,A is an element from III or IV main groups,and X is carbon or/and nitrogen)phase ceramics display a unique combination of properties and may serve as an ideal reinforcement phase for electrical contact materials.The biological materials evolved in nature generally exhibit three-dimensional(3D)interpenetrating-phase architectures,which may offer useful inspiration for the architectural design of electrical contact materials.Here,a series of bi-continuous Ag-Ti_(3)SiC_(2) MAX phase composites with high ceramic contents exceeding 50 vol.%and having micron-and ultrafine-scaled 3D interpenetrating-phase architectures,wherein both constituents were continuous and mutually interspersed,were exploited by pressureless infiltration of Ag melt into partially sintered Ti_(3)SiC_(2) scaffolds.The mechanical and electrical properties as well as the friction and wear performance of the composites were investigated and revealed to be closely dependent on the ceramic contents and characteristic structural dimensions.The composites exhibited a good combination of properties with high hardness over 2.3 GPa,high flexural strength exceeding 530 MPa,decent fracture toughness over 10 MPa·m^(1/2),and good wear resistance with low wear rate at an order of 10^(-5)mm^(3)/(N·m),which were much superior compared to the counterparts made by powder metallurgy methods.In particular,the hardness,electrical conductivity,strength,and fracture toughness of the composites demonstrated a simultaneous improvement as the structure was refined from micron-to ultrafine-scales at equivalent ceramic contents.The good combination of properties along with the facile processing route makes the Ag-Ti_(3)SiC_(2)3D interpenetrating-phase composites appealing for electrical contact applications. | Yu Guo Xi Xie Zengqian Liu Longchao Zhuo Jian Zhang Shaogang Wang Qiqiang Duan Qing Jia Dake Xu Weihai Xue Deli Duan Filippo Berto Zhefeng Zhang Rui Yang | 2024 | Nano Research2024，17，2： | 1 |
| 15 | Some arithmetical properties of primitive numbers of power p显示文摘 | Xu Zhefeng | 2006 | Scientia Magna2006，2，1： | 1 |
| 16 | Theoretical demonstration of all-optical switchable and tunable UWB doublet pulse train generator utilizing SOA wavelength conversion and tunable time delay显示文摘一个所有光的 ultrawide 乐队(UWB ) 马甲脉搏火车信号生成器被利用求婚并且理论上模仿了在在光放大器(SOA ) 和可控制的时间在二光延期推迟的一个半导体的效果衬里的跨获得的调整(XGM )(ODL ) 上基础的反的波长变换。建议计划在由交换输入脉搏的极性的脉搏的极性光学地是可切换的不仅而且在信号脉搏宽度和 radiofrequency (RF ) 悦耳由调节 ODL 的光谱。 | Zhefeng HU Jianhui XU Min HOU | 2017 | Frontiers of Optoelectronics2017，10，2： | 1 |
| 17 | Some arithmetical properties of primitive numbers of power p显示文摘 | Xu Zhefeng | 2006 | Scientia Magna2006，2，： | 1 |
| 18 | Some arithmetical primitive numbers cff power p显示文摘 | Xu zhefeng | 2006 | Scientia Magna2006，，2： | 1 |
| 19 | On the 2k-th power mean of the character sums over short intervals 显示文摘 | XU Zhefeng ZHANG Wenpeng | 2006 | Acta Arith- metica2006，121，2： | 1 |
| 20 | On the additive k-power complements显示文摘 | Xu Zhefeng | 2004 | Research on Smarandache Problems in Number Theory2004，1，： | 1 |
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