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A Silicon Micromachined Gyroscope Driven by the Rotating Carrier Self

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稀有金属材料与工程 2006年第A03期35卷 519-521页

作者： Fuxue Zhang Xu mao Yu Liu nan Zhang Wei Zhang Sensor Research Center Beijing Information Technology Institute Beijing 100101 China

This paper reported a silicon micromachined gyroscope which is driven by the rotating carrier's angular velocity,the silicon was manufactured by anisotropy *** design,fabrication and packing of the sensing element were introduced in the *** imitation experimentation and performance test have certificated that the principle of the gyroscope is correct and the gyroscope can be used to sense yawing or pitching angular velocity of the rotating carrier,and the angular velocity of the rotating carrier itself.

关键词： rotating carrier micromachine gyroscope angular velocity

Investigation of chemical suppressants for inactivation of sulfideores

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Journal of Central South University 2001年第3期13卷 180-184页

作者： WU Chao LI Zi-jun ZHOU Bo WANG Ping-long LI mao-nan College of Resources Environment and Civil EngineeringCentral South Univer sityChangsha 410083China

In order to investigate the effective control method of sp ontaneous com bustion in the mining of sulfide ore deposits. This paper presents the testing r esults of several selected chemicals (water glass, calcium chloride, calcium oxi de, magnesium oxide and their composites) as oxidation suppressants for sulfide ores. A weight increment scaling method was used to measure suppressant performa nce, and this method proved to be accurate, simple and convenient. Based on a large number of experiments, the test results show that four types of chemical mixtures demonstrate a good performance in reducing the oxidation rate of seven active sulfide ore samples by up to 27% to 100% during an initial 76 d period. T he mixtures of water glass mixed with calcium chloride and magnesium oxide mixed with calcium chloride can also act as fire suppressants when used with fire spr inkling systems.

关键词： sulfide ores oxidation chemical suppressants

Identification of a new Hazelnut disease in Liaoning Province:Hazelnut husk brown rot

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BIOCELL 2022年第9期46卷 2145-2149页

作者： JUN SUN MING XIE JIACHEN HAO nan mao LIJING CHEN YUANYUAN QIN Liaoning Institute of Economic Forestry Dalian116031China Shenyang Agricultural University Shenyang110866China Southwest University Chongqing400700China

Hazelnut husk brown rot has been identified as a new disease in Liaoning Province in recent *** objective of this study as to identify the pathogen.[Method]In this study,a standard sample of hazelnut husk brown rot was collected from Songmudao Base in Dalian City,Liaoning *** pathogen was identified by the studies of the morphology,pathogenicity,and analyses of ITS and LSU *** pathogen was isolated and purified,which was confirmed by Koch’s *** symptoms after inoculation were the same as those collected directly from a diseased tree,which showed that it was the pathogenic *** cultural characteristics and conidia and the morphology of the pathogenic fungi were similar to those of Botrytis cinerea’*** ITS sequences and LSU sequences were compared to the associated strain sequences in GenBank,with 100%identity to Botrytis cinerea(GenBank accession number:MN589848.1)and Botrytis cinerea(GenBank accession number:KU140653.1),*** infection status of the pathogen on the hazelnut husks was also *** studies suggested that the pathogen leading to the hazelnut husk brown rot as a new disease in Liaoning Province was Botrytis cinerea.

关键词： Hazelnut husk brown rot Pathogen identification Botrytis cinerea Infection process

Hot deformation behavior and constitutive model of TC18 alloy during compression

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Rare Metals 2014年第4期33卷 383-389页

作者： Bao-Hua Jia Wei-Dong Song Hui-Ping Tang Zhi-Hua Wang Xiao-nan mao Jian-Guo Ning State Key Laboratory of Explosion Science and Technology Beijing Institute of Technology State Key Laboratory of Porous Metal Materials Northwest Institute for Nonferrous Metal Research Institute of Applied Mechanics and Biomedical Engineering Taiyuan University of Technology Northwest Institute for Nonferrous Metal Research

The hot deformation behavior of TC18 alloy at strain rates ranging from 1 × 10-4 to 1 x 10-2 s-1 and temperatures ranging from 25 to 800 ℃ was studied using a WDW-300 electronic universal testing machine. The relationships between true flow stress decreases with stress and true strain show that the increase of temperature and increases as strain rate increases. The effect of strain rate on the flow stress becomes pronounced at higher temper- atures. At room temperature, the river pattern characteristic of brittle fracture and the dimple pattern typical of ductile fracture are found to exist in different regions of fracture surfaces of the samples. An improved constitutive rela- tionship is proposed to accurately describe the flow stress of TC18 by considering the effect of strain. And a micro- scopic model is also deduced which can link the physical mechanisms to the macroscopic experimental results. A good agreement is obtained between the predictions of the microscopic model and the results of the macroscopic experiment.

关键词： TC18 titanium alloy Hot deformation Strainrate Constitutive model

Extremely high-rate aqueous supercapacitor fabricated using doped carbon nanoflakes with large surface area and mesopores at near-commercial mass loading

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nano Research 2017年第5期10卷 1767-1783页

作者： nan mao Huanlei Wang Yang Sui Yongpeng Cui Jesse Pokrzywinski Jing Shi Wei Liu Shougang Chen Xin Wang David Mitlin Institute of Materials Science and Engineering Ocean University of China Qingdao 266100 China Chemical & Biomolecular Engineering and Mechanical Engineering Clarkson University 8 Clarkson Avenue Potsdam NY 13699 USA

Achieving a satisfactory energy-power combination in a supercapacitor that is based on all-carbon electrodes and operates in benign aqueous media instead of conventional organic electrolytes is a major challenge. For this purpose, we fabricated carbon nanoflakes （20-100 nm in thickness, 5-μm in width） containing an unparalleled combination of a large surface area （3,000 m2-g-1 range） and mesoporosity （up to 72%）. These huge-surface area functionalized carbons （HSAFCs） also had a substantial oxygen and nitrogen content （N10 wt.% combined）, with a significant fraction of redox-active carboxyl/phenol groups in an optimized specimen. Their unique structure and chemistry resulted from a tailored single-step carbonization-activation approach employing （2-benzimidazolyl） acetonitrile combined with potassium hydroxide （KOH）. The HSAFCs exhibited specific capacitances of 474 F-g-1 at 0.5 A.g-1 and 285 F-g-1 at 100 A.g-1 （charging time 〈 3 s） in an aqueous 2 M KOH solution. These values are among the highest reported, especially at high currents. When tested with a stable 1.8-V window in a 1 M Na2SO4 electrolyte, a symmetric supercapacitor device using the fabricated nanoflakes as electrodes yielded a normalized active mass of 24.4 Wh-kg-1 at 223 W·kg-1 and 7.3 Wh·kg-1 at 9,360 W·kg-1. The latter value corresponds to a charge time of 〈3 s. The cyclability of the devices was excellent, with 93% capacitance retention after 10,000 cycles. All the electrochemical results were achieved by employing electrodes with near-commercial mass loadings of 8 mg-cm-2.

关键词： energy storage high power activated carbon graphene doped carbon heteroatoms

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采用粒子群优化粒子滤波的红外目标提取算法

红外与毫米波学报 2010年第1期29卷 63-68页

作者：周越毛晓楠上海交通大学模式识别与图像处理研究所上海200240 上海航天控制工程研究所上海200233

提出了一种新的基于粒子群优化粒子滤波(PSOPF)的红外目标提取算法,将红外目标提取阈值的计算问题看作系统状态估计问题.在粒子滤波的框架下,建立了关于灰度—方差加权信息熵和像素点灰度值的阈值状态空间,建立了基于粒子群优化算法思... 详细信息

提出了一种新的基于粒子群优化粒子滤波(PSOPF)的红外目标提取算法,将红外目标提取阈值的计算问题看作系统状态估计问题.在粒子滤波的框架下,建立了关于灰度—方差加权信息熵和像素点灰度值的阈值状态空间,建立了基于粒子群优化算法思想的系统状态转移模型,建立了基于红外目标提取效果评价函数的系统观测模型,它有效综合了红外图像中灰度、信息熵、梯度、像素点的空间位置等信息.最后,以粒子的加权平均估计目标提取的阈值.实验结果表明,该方法是有效且稳健的.

关键词：粒子滤波粒子群优化目标提取灰度-方差加权信息熵

Role of intelligent/interactive qualitative and quantitative analysisthree-dimensional estimated model in donor-recipient size mismatch following deceased donor liver transplantation

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World Journal of Gastroenterology 2023年第44期29卷 5894-5906页

作者： Han Ding Zhi-Guo Ding Wen-Jing Xiao Xu-nan mao Qi Wang Yi-Chi Zhang Hao Cai Wei Gong Department of Transplantation Xinhua HospitalAffiliated to Shanghai Jiaotong University School of MedicineShanghai 200092China Department of General Surgery The Third People’s Hospital of YangzhouYangzhou 225126Jiangsu ProvinceChina Department of Tuberculosis Control Shanghai Municipal Center for Disease Control and PreventionShanghai 200336China Department of Biliary-Pancreatic Surgery Shanghai Changzheng HospitalSecond Military Medical UniversityShanghai 200003China Department of Pathology First Affiliated Hospital of Nanjing Medical UniversityNanjing 210029JiangsuChina Department of General Surgery Xinhua HospitalAffiliated to Shanghai Jiaotong University School of MedicineShanghai 200092China Shanghai Key Laboratory of Biliary Tract Disease Research Shanghai200092China

BACKGROUND Donor-recipient size mismatch(DRSM)is considered a crucial factor for poor outcomes in liver transplantation(LT)because of complications,such as massive intraoperative blood loss(IBL)and early allograft dysfunction(EAD).Liver volumetry is performed routinely in living donor LT,but rarely in deceased donor LT(DDLT),which amplifies the adverse effects of DRSM in *** to the various shortcomings of traditional manual liver volumetry and formula methods,a feasible model based on intelligent/interactive qualitative and quantitative analysis-three-dimensional(IQQA-3D)for estimating the degree of DRSM is *** To identify benefits of IQQA-3D liver volumetry in DDLT and establish an estimation model to guide perioperative *** We retrospectively determined the accuracy of IQQA-3D liver volumetry for standard total liver volume(TLV)(sTLV)and established an estimation TLV(eTLV)index(eTLVi)*** operating characteristic(ROC)curves were drawn to detect the optimal cut-off values for predicting massive IBL and EAD in DDLT using donor sTLV to recipient sTLV(called sTLVi).The factors influencing the occurrence of massive IBL and EAD were explored through logistic regression ***,the eTLVi model was compared with the sTLVi model through the ROC curve for *** A total of 133 patients were included in the *** Changzheng formula was accurate for calculating donor sTLV(P=0.083)but not for recipient sTLV(P=0.036).Recipient eTLV calculated using IQQA-3D highly matched with recipient sTLV(P=0.221).Alcoholic liver disease,gastrointestinal bleeding,and sTLVi>1.24 were independent risk factors for massive IBL,and drug-induced liver failure was an independent protective factor for massive *** donor-female recipient combination,model for end-stage liver disease score,sTLVi≤0.85,and sTLVi≥1.32 were independent risk factors for EAD,and viral hepatitis was an independent protective factor for *** overall surv

关键词： Intelligent/interactive qualitative and quantitative analysis-three-dimensional Donor-recipient size mismatch Intraoperative blood loss Early allograft dysfunction

Global dimension and left derived functors of Hom

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Science China Mathematics 2007年第6期50卷 887-898页

作者： Li-xin mao & nan-qing DING Institute of Mathematics, nanjing Institute of Technology, nanjing 211167, China Department of Mathematics, nanjing University, nanjing 210093, China 1. Institute of Mathematics Nanjing Institute of Technology Nanjing 211167 China 2. Department of Mathematics Nanjing University Nanjing 210093 China

It is well known that the right global dimension of a ring R is usually computed by the right derived functors of Hom and the left projective resolutions of right R-modules. In this paper, for a left coherent and right perfect ring R, we characterize the right global dimension of R, from another point of view, using the left derived functors of Hom and the right projective resolutions of right R-modules. It is shown that rD(R) ? n (n ? 2) if and only if the gl right Proj-dim M R ? n?2 if and only if Ext n?1(N,M) = 0 for all right R-modules N and M if and only if every (n?2)th Projcosyzygy of a right R-module has a projective envelope with the unique mapping property. It is also proved that rD(R) ? n (n ? 1) if and only if every (n?1)th Proj-cosyzygy of a right R-module has an epic projective envelope if and only if every nth Proj-cosyzygy of a right R-module is projective. As corollaries, the right hereditary rings and the rings R with rD(R) ? 2 are characterized.

关键词： global dimension projective resolution envelope 16E10 16E30 16E05

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用好数控机床,提高机械加工效率

制造技术与机床 2007年第5期 116-119页

作者：毛楠西安东风仪表厂陕西西安710065

数控机床具有生产效率和加工自动化程度高，零件的加工精度和产品的质量稳定性好，能完成许多普通机床难以加工或根本无法加工的复杂型面加工，几乎不要专用的工装卡具、减少在制品，提高经济效益和大大减轻操作工人的劳动强度等一系列... 详细信息

数控机床具有生产效率和加工自动化程度高，零件的加工精度和产品的质量稳定性好，能完成许多普通机床难以加工或根本无法加工的复杂型面加工，几乎不要专用的工装卡具、减少在制品，提高经济效益和大大减轻操作工人的劳动强度等一系列优点。同时它又是实现工厂自动化FA和柔性制造系统FMS的基础。因此，提高数控机床的加工效率，发挥它的最大经济效益，是必须重视的问题。

关键词：加工效率数控机床最大经济效益机械复杂型面加工柔性制造系统自动化程度质量稳定性