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0.04 degree-per-hour MEMS disk resonator gyroscope with high-quality factor (510 k) and long decaying time constant(74.9 s)

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Microsystems & Nanoengineering 2018年第1期4卷 46-56页

作者： Qingsong Li Dingbang Xiao Xin Zhou Yi Xu Ming Zhuo Zhanqiang Hou Kaixuan He yongmeng Zhang Xuezhong Wu College of Intelligence Science National University of Defense TechnologyChangsha 410073China Laboratory of Science and Technology on Integrated Logistics Support National University of Defense TechnologyChangsha 410073China State Key Laboratory of ASIC and System School of MicroelectronicsFudan UniversityShanghai 200433China East China Institute of Photo-Electron IC Bengbu 233042China

The disk resonator gyroscope is an attractive candidate for high-performance MEMS *** gyroscope consists of a sensor and readout electronics,and the characteristics of the sensor directly determine the *** the sensor,a high-quality factor and long decaying time constant are the most important characteristics required to achieve high *** report a disk resonator gyroscope with a measured quality factor of 510 k and decaying time constant of 74.9 s,which is a record for MEMS silicon disk resonator gyroscopes,to the best of our *** improve the quality factor of the DRG,the quality factor improvement mechanism is first analyzed,and based on this mechanism two stiffness-mass decoupled methods,i.e.,spoke length distribution optimization and lumped mass configuration design,are proposed and demonstrated.A disk resonator gyroscope prototype is fabricated based on these design strategies,and the sensor itself shows an angle random walk as low as 0.001°/√h,demonstrating true potential to achieve navigation-grade *** gyroscope with readout electronics shows an angle random walk of 0.01°/√h and a bias instability of 0.04°/h at room temperature without compensation,revealing that the performance of the gyroscope is severely limited by the readout electronics,which should be further *** expect that the quality factor improvement methods can be used in the design of other MEMS gyroscopes and that the newly designed DRG can be further improved to achieve navigation-grade performances for high-end industrial,transportation,aerospace,and automotive applications.

关键词： resonator constant attractive

Influence of thymopentin-5 on renal pathology and relevant indexes of serum in rats with acute kidney injury caused by sepsis

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Discussion of Clinical Cases 2015年第3期2卷 17-21页

作者： yongmeng Zhu Lingfeng Wang Weidong Guo Collage of Life Science of Inner Mongolia University HuhehaoteChina Department of Urinary Surgery The Third Affiliated Hospital of Inner Mongolia Medical UniversityBaotouChina Department of Burn The Third Affiliated Hospital of Inner Mongolia Medical UniversityBaotouChina Department of Oncology The Third Affiliated Hospital of Inner Mongolia Medical UniversityBaotouChina

Objective:To discuss thymopentin-5 on renal pathology and relevant indexes of serum with sepsis-caused acute kidney injury(AKI)caused by cecal ligation and puncture(CLP).Methods:90 cases of healthy and male SD rats were randomly divided into 3 groups:control group(C group),sepsis group(S group),thymopentin group(T group).These groups were divided into five time point including 1 h,6 h,12 h,24 h and 48 h with 6 rats in each time *** sepsis model was made by *** blood and kidney tissue were collected in each time *** of renal pathology were observed under light microscope and relevant indexes like serum creatinin(Cr),blood urea nitrogen(Bun),tumor necrosis factorα(TNF-α),interleukin-10(IL-10),CD4+/CD8+were tested and ***:In T group,concentrations of Cr,Bun in 6 h after CLP started to rise,reached peak in 24 h and decreased in 48 h,which were all lower than S group(p<.05)and higher than C group(p<.05).Compared with C group,concentrations of TNF-αin 1 h significantly improved,reached peak in 12 h and decreased in 24 h,which were all lower than S group(p<.05);and concentrations of IL-10 in 1 h significantly decreased,reached peak in 12 h and rised in 24 h,which were all more than S group(p<.05).In T group,CD4+/CD8+ratio in 6 h after CLP started to decrease,reached the lowest in 24 h and rised in 48 h,which were all lower than S group(p<.05)and significantly lower than C group(p<.05).Conclusions:Thymopentin-5 plays the role of renal protection in AKI caused by sepsis.

关键词： Thymopentin-5 Sepsis Acute kidney injury

Inhibitory effect of survivin-shRNA on A431 cutaneous squamous cell carcinoma

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Discussion of Clinical Cases 2018年第4期5卷 1-8页

作者： Yuqin Hao Xia Liu Shuxia Kang Xin Zhang Kun Zhang yongmeng Zhu Department of Dermatology The Third Affiliated Hospital of Inner Mongolia Medical University(Baogang Hospital)BaotouInner MongoliaChina Inner Mongolia Medical University HohehotInner MongoliaChina Reproductive Medicine Center The Third Affiliated Hospital of Inner Mongolia Medical University(Baogang Hospital)BaotouInner MongoliaChina

Objective:To observe the effect of survivin-shRNA on A431 cutaneous squamous cell carcinoma(SCC)and explore the molecular biological mechanism of nuclear factorκB(NF-κB)in the inhibition of survivin-shRNA on cutaneous ***:Survivin-shRNA adenovirus vector was constructed to screen out the best interference *** mice were subcutaneously inoculated with the cultured A431 cell suspension to duplicate A431 transplanted tumor *** mice were randomly divided into the blank control group,the rAd-EGFP negative control group,the rAd-survivin-shRNA transfection group and the Res positive control group,with 5 mice in each *** corresponding reagents were injected into the *** the mice were sacrificed on the 20th *** tumor tissues were isolated,with tumor volume and tumor weight measured,the tumor growth curves were accordingly plotted and the tumor inhibition rate was consequently ***-eosin(HE)staining was used to observe the cellular morphology of the *** was applied to the detection of cell *** blot was applied to the detection of the expression of Survivin,inhibitor of NF-κB(IκB),P65,P53 and ***:As to the transplanted tumors,tumor volume and tumor weight were decreased in nude mice in the rAd-survivinshRNA transfection group and the Res positive control group,in comparison with the blank control group and the rAd-EGFP negative control group,the differences were of statistical significance(p<.05);The results of TUNEL showed that the apoptosis rates were significantly increased in the rAd-survivin-shRNA transfection group and the Res positive control group,in comparison with the blank control group and the rAd-EGFP negative control group,the difference was statistically significant(p<.05);In the rAd-survivin-shRNA transfection group and the Res positive control group,the microscopic observation showed a small amount of sparsely-distributed tumor cells,degenerative liquefactive necr

关键词： Survivin-shRNA NF-κB Cutaneous squamous cell carcinoma Inhibitory effect

Unveiling subsurface hydrogen inhibition for promoting electrochemical transfer semihydrogenation of alkynes with water

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Chinese Journal of Catalysis 2022年第12期43卷 3095-3100页

作者： Qi Hao yongmeng Wu Cuibo Liu Yanmei Shi Bin Zhang a Department of Chemistry Institute of Molecular PlusSchool of ScienceTianjin UniversityTianjin 300072China Frontiers Science Center for Synthetic Biology Key Laboratory of Systems Bioengineering(Ministry of Education)Tianjin UniversityTianjin 300072China

Highly selective electrocatalytic semihydrogenation of alkynes to alkenes with water as the hydrogen source over palladium-based electrocatalysts is significant but remains a great challenge because of the excessive hydrogenation capacity of ***,we propose that an ideal palladium catalyst should possess weak alkene adsorption and inhibit subsurface hydrogen formation to stimulate the high selectivity of alkyne ***,sulfur-modified Pd nanowires(Pd-S NWs)are designedly prepared by a solid-solution interface sulfuration method with KSCN as the sulfur *** introduction of S weakens the alkene adsorption and prevents the diffusion of active hydrogen(H^(*))into the Pd lattice to form unfavorable subsurface H^(*).As a result,electrocatalytic alkyne semihydrogenation is achieved over a Pd-S NWs cathode with wide substrate scopes,potential-independent up to 99%alkene selectivity,good fragile groups compatibility,and easily synthesized deuterated *** adsorbed hydrogen addition mechanism of this semihydrogenation reaction is ***,an easy modification of commercial Pd/C by in situ addition of SCN–enabling the gram-scale synthesis of an alkene with 99%selectivity and 95%conversion highlights the promising potential of our method.

关键词： Electrocatalysis Alkyne semihydrogenation Selectivity Hydrogen adsorption Interface sulfuration

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试析市场技术交易的技术保密合约主体

科技管理研究 2011年第22期31卷 159-161页

作者：宋永猛上海市科学学研究所上海200235

在市场技术交易中,履行技术秘密保护措施的技术保密合约是民事法律关系的统一体。其有特殊的内在规定性,这种特殊的内在规定性构成了技术保密合约民事法律关系设立的要素,并且作为合约的技术秘密传递规则,形成了技术保密合约民事法律关... 详细信息

在市场技术交易中,履行技术秘密保护措施的技术保密合约是民事法律关系的统一体。其有特殊的内在规定性,这种特殊的内在规定性构成了技术保密合约民事法律关系设立的要素,并且作为合约的技术秘密传递规则,形成了技术保密合约民事法律关系特征。其主体和主体之间的权利和义务是此民事法律关系要素。技术保密合约主体民事行为必须具有合法性。

关键词：市场保密合约主体

A Study on the Control of BDSIGPS Self-phase Quadrifilar Helical Antenna for Ship

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Journal of Shipping and Ocean Engineering 2017年第3期7卷 108-111页

作者： SUN Zhen ZHAO Jiansen WANG Shengzheng XU Tie LIU Wei CHANG yongmeng Merchant Marine College Shanghai Maritime University Shanghai 201306 China

A reconfigurable, self-phase quadrifilar helical antenna was designed at BDS/GPS frequency band. The impedance, gain and directivity of the antenna were studied by HFSS based on FEM （finite element method） and experiment. Results show the beam width of the main lobe of the pattern can reach over 160° with the help of the load on the top of the antenna. And the power of the side-lobe level is very low. In addition, the quadrifitar helix antenna has excellent right-hand circular polarization performance with a beam width of 180°. Both single-frequency and double-frequency communications can be carried out by the antenna in the ranges between 1.2 and 1.8 GHz, with the bandwidth of each frequency about 60 MHz, the simulating and experimental results are nearly the same.

关键词： Quadrifilar helical antenna controllability beidou FEM

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自然环境下道口客车车身字符识别算法研究

计算机工程与应用 2020年第16期56卷 191-198页

作者：赵永猛宓超上海海事大学物流工程学院上海201306

针对外观尺寸相近,处于分类区间边缘的客车车型识别率不高的问题,提出通过识别车身限载数字字符进行车型分类的方法。由二值图结合字符的格式塔特征实现文字区域精定位,将分割出的数字字符使用神经网络进行识别,最终将识别的结果对应转... 详细信息

针对外观尺寸相近,处于分类区间边缘的客车车型识别率不高的问题,提出通过识别车身限载数字字符进行车型分类的方法。由二值图结合字符的格式塔特征实现文字区域精定位,将分割出的数字字符使用神经网络进行识别,最终将识别的结果对应转换成相应客车类别以实现车型分类。将该算法在道口采集的三类、四类客车样本上进行实验,综合识别率为88.5%,相比基于外观几何特征的车型识别,识别率提高了将近10个百分点,且基于改进二值化算法(Psauvola)的字符识别相比使用其他二值化算法,识别率提升了一倍多。

关键词：二值化区域检测字符分割字符识别 Psauvola

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基于信息融合的刀具剩余寿命在线预测方法

华中科技大学学报（自然科学版） 2017年第4期45卷 1-5页

作者：吴军苏永衡朱永猛邓超华中科技大学船舶与海洋工程学院湖北武汉430074 华中科技大学机械科学与工程学院湖北武汉430074

针对加工中心刀具剩余寿命预测的实际需求,提出了一种基于信息融合的刀具剩余寿命在线预测方法.通过在加工中心主要功能部件上安装传感器,实时采集加工中心运行过程中的动态信号,经信号预处理和特征参数提取,采用皮尔逊相关系数和残差... 详细信息

针对加工中心刀具剩余寿命预测的实际需求,提出了一种基于信息融合的刀具剩余寿命在线预测方法.通过在加工中心主要功能部件上安装传感器,实时采集加工中心运行过程中的动态信号,经信号预处理和特征参数提取,采用皮尔逊相关系数和残差分析相结合的方法进行特征降维,获得最优的特征参数集.建立基于自适应神经模糊推理系统的刀具剩余寿命预测模型,在线预测刀具剩余寿命.实例分析结果显示:该预测方法的预测结果平均准确率为95.21%,可以满足实际需求.同时,将该预测方法与BP神经网络及其变异模型进行了对比,发现该预测方法预测精度更高.

关键词：加工中心自适应神经模糊推理系统剩余寿命预测信息融合特征降维

易燃厚煤层半孤岛综放工作面瓦斯与火耦合防治技术

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中国煤炭 2016年第6期42卷 105-108页

作者：吴磊白永萌枣庄科技职业学院山东省滕州市277500

针对瓦斯与自然发火防治中存在的顾此失彼、治理措施相互干扰影响大等问题,结合3±219半孤岛工作面的实际情况,确定了预防为主的自然发火治理思路,重点采用了采空区自然发火监测、采空区预防性注浆和喷洒阻化剂、工作面煤体超前惰化、... 详细信息

针对瓦斯与自然发火防治中存在的顾此失彼、治理措施相互干扰影响大等问题,结合3±219半孤岛工作面的实际情况,确定了预防为主的自然发火治理思路,重点采用了采空区自然发火监测、采空区预防性注浆和喷洒阻化剂、工作面煤体超前惰化、邻侧采空区堵漏风等预防措施,在此基础上,采用了邻近采空区抽放和高位钻孔瓦斯抽放的瓦斯治理技术措施,瓦斯抽放参数、抽放时间根据工作面自然发火情况及时优化调整,有效防止了工作面开采期间瓦斯与自然发火灾害的发生,保障了工作面的安全生产。

关键词：易燃厚煤层半孤岛工作面自然发火瓦斯抽放