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A Simplified-Syntax-Based Static Structure Model for Embedded Software Analysis

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Wuhan University Journal of Natural Sciences 2016年第4期21卷 324-332页

作者： XU Xiangyang LIU Qing zhang weixin YANG Guangyi LIU Jinshuo Baodi Tianjin Power Supply Company Tianjin 300000China Tianjin Electric Power Science Research Institute Tianjin 300000 China School of Computer Wuhan University Wuhan 430079Hubei China

In order to solve the problem that the embedded software has the shortcoming of the platform dependence, this paper presents an embedded software analysis method based on the static structure model. Before control flow and data flow analysis, a lexical analysis/syntax analysis method with simplified grammar and sentence depth is designed to analyze the embedded software. The experiments use the open source code of smart meters as a case, and the artificial faults as the test objects, repeating 30 times. Compared with the popular static analyzing tools PC-Lint and Splint, the method can accurately orient 91% faults, which is between PC-Lint＇s 95% and Splint＇s 85%. The result indicates that the correct rate of our method is acceptable. Meanwhile, by removing the platform-dependent operation with simplified syntax analysis, our method is independent of development environment. It also shows that the method is applicable to the compiled C（including embedded software） program.

关键词： embedded system static structure model software analysis

Microbial activity was greater in soils added with herb residue vermicompost than chemical fertilizer

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Soil Ecology Letters 2020年第3期2卷 209-219页

作者： Meirong Lv Jingjuan Li weixin zhang Bo Zhou Jun Dai Chi zhang The College of Natural Resources and Environment South China Agricultural UniversityGuangzhou 510650China Institute of Oceanographic Instrumentation Qilu University of Technology(Shandong Academy of Sciences)Shandong Provincial Key Laboratory of Marine Monitoring Instrument Equipment TechnologyNational Engineering and Technological Research Center of Marine Monitoring EquipmentQingdao 260000China Agricultural Technology Promotion Center of Huicheng District Huizhou 516008China Key Laboratory of Geospatial Technology for Middle and Lower Yellow River Regions Ministry of Education/College of Environment and PlanningHenan UniversityKaifeng 475004China Tea Research Institute Guangdong Academy of Agricultural SciencesGuangzhou 510650China

Herb residue vermicompost is thought to have high agriculture value,while its effects on soil microbial activities have not been fully ***,soil microbial biomass,respiration and enzyme activities in soil planted with maize were compared among treatments amended with herb residue vermicompost at rates of 25,50,75 and 100 g kg^(-1),chemical NPK fertilizer and no fertilizer(the control).Our results showed that soil microbial biomass carbon,respiration,and alkaline phosphatase,urease,and invertase activities were greater in soil amended with herb residue vermicompost than the unfertilized control(P<0.05).Compared with chemical fertilizer,herb residue vermicompost increased soil urease and alkaline phosphatase activities at each application rate,promoted soil respiration and microbial biomass carbon at the application rates of 50,75 and 100 g kg^(-1),and increased soil inverse activity at the application rates of 75 and 100 g kg^(-1).In conclusion,herb residue vermicompost supported greater soil microbial biomass,respiration and enzyme activities than conventional NPK fertilizer,and the effect was larger when higher rates of herb residue vermicompost were added.

关键词： Soil Herb residue vermicompost Microbial biomass Respiration Enzyme activity

基体偏压对高功率脉冲磁控溅射制备CrAlN薄膜性能的影响

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中国表面工程 2022年第5期35卷 200-209页

作者：张辉巩春志王晓波张炜鑫田修波哈尔滨工业大学先进焊接与连接国家重点实验室哈尔滨150001 中国工程物理研究院材料研究所绵阳621900

为了防止氢扩散导致金属材料的失效,通常在其表面制备一层CrN阻氢薄膜。但是CrN涂层的热稳定性较差,抗氧化温度低于600℃。采用高功率脉冲磁控溅射技术,利用Cr和Al双靶共沉积CrAlN薄膜来提高其高温抗氧化性能。试验变量为基体负偏压的大... 详细信息

为了防止氢扩散导致金属材料的失效,通常在其表面制备一层CrN阻氢薄膜。但是CrN涂层的热稳定性较差,抗氧化温度低于600℃。采用高功率脉冲磁控溅射技术,利用Cr和Al双靶共沉积CrAlN薄膜来提高其高温抗氧化性能。试验变量为基体负偏压的大小,分别为-100 V、-200 V、-300 V和-400 V。结果表明,四组CrAlN薄膜均为柱状晶结构,随着基体偏压提高,膜层的致密度提高,但同时薄膜沉积速率下降;CrAlN薄膜的择优生长方向为Cr(200)晶面法线方向。四组CrAlN薄膜的氢抑制率均超过70%,氢原子扩散系数最低比316L不锈钢基体低3个数量级。当基体偏压为-300 V时,可以同时获得最优的氢抑制率(87.4%)和最低的氢原子扩散系数(6.188×10^(-10)cm^(2)/s)。600℃、氧气气氛下保温60 min,CrAlN膜基结合面处氧含量仅为表面处的30%左右。相比于CrN薄膜,在相同基体偏压下,CrAlN薄膜的氢原子扩散系数更小;高偏压下制备的CrAlN薄膜氧增重量仅为316L不锈钢基体的10%,抗氧化性能更好。

关键词： CrAlN 高功率脉冲磁控溅射基体偏压阻氢高温抗氧化

An ignored key link in greenhouse effect:Soil and soil CO_(2) slow heat loss

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Soil Ecology Letters 2020年第4期2卷 308-316页

作者： weixin zhang Chengde Yu Zhifeng Shen Shu Liu Suli Li Yuanhu Shao Shenglei Fu Key Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions Ministry of Education/College of Environment and PlanningHenan UniversityKaifeng 475004China School of Life Sciences Henan UniversityKaifeng 475004China

The ever-increasing atmospheric CO_(2) concentration is a key driver of modern global ***,the low heat capacity of atmosphere and strong convection processes in the troposphere both limit heat *** the higher heat capacity and CO_(2) concentration in soil compared to the atmosphere,the direct contributions of soil to the greenhouse effect may be *** experimentally manipulating CO_(2) concentrations both in the soil and the atmosphere,we demonstrated that the soil-retained heat and the slower soil heat transmission decrease the amount of heat energy leaking from the ***,the soil air temperature was affected by soil CO_(2) concentration,with the highest value recorded at 7500 ppm CO_(2).This study indicates that soil and soil CO_(2),together with atmospheric CO_(2),play a crucial role in the greenhouse *** spatial and temporal heterogeneity of soils and soil CO_(2) should be further investigated,given their potentially significant influence on global climate change.

关键词： Soil CO_(2)concentration Soil temperature Atmosphere temperature Soil heat loop Earth heat balance

Machine learning in polymer informatics

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InfoMat 2021年第4期3卷 353-361页

作者： Wuxin Sha Yan Li Shun Tang Jie Tian Yuming Zhao Yaqing Guo weixin zhang Xinfang zhang Songfeng Lu Yuan-Cheng Cao Shijie Cheng State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhanChina Shenzhen Power Supply Col.Ltd. ShenzhenChina School of Computer Science and Technology Huazhong University of Science and TechnologyWuhanChina

Polymers have been widely used in energy storage,construction,medicine,aerospace,and so ***,the complexity of chemical composition and morphology of polymers has brought challenges to their *** to the integration of machine leaming algorithms and large data resources,the data-driven methods have opened up a new road for the development of poly-mer science and *** emerging polymer informatics attempts to accelerate the performance prediction and process optimization of new poly-mers by using machine learning models based on reliable *** the grad-ual supplement of currently available databases,the emergence of new databases and the continuous improvement of machine learning algorithms,the research paradigm of polymer informatics will be more efficient and widely *** on these points,this paper reviews the development trends of machine learning assisted polymer informatics and provides a simple introduc-tion for researchers in materials,artificial intelligence,and other fields.

关键词： polymer learning artificial

Considerable impacts of litter inputs on soil nematode community composition in a young Acacia crassicapa plantation

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Soil Ecology Letters 2021年第2期3卷 145-155页

作者： CANCAN ZHAO YIN LI CHENLU zhang Yuan Miao Mengzhou Liu Wanlin Zhuang Yuanhu Shao weixin zhang Shenglei Fu International Joint Research Laboratory for Global Change Ecology Laboratory of Biodiversity Conservation and Ecological RestorationSchool of Life SciencesHenan UniversityKaifeng 475004China Key Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions Ministry of EducationCollege of Environment and PlanningHenan UniversityKaifeng 475004China Henan Key Laboratory of Integrated Air Pollution Control and Ecological Security Kaifeng 475004China

Aboveground litter inputs and root exudates provide basal resources for soil communities,however,their relative contributions to soil food web are still not well ***,we conducted a field manipulative experiment to differentiate the effects of litter inputs and living root on nematode community composition of surface and subsoils in a young Acacia crassicapa plantation in southern *** results showed that both litter addition and root presence significantly enhanced soil nematode abundance by 17.3%and 35.3%,*** addition altered nematode trophic group composition,decreased fungivore to bacterivore ratio,and enhanced maturity index and structure index,which led to a bacterial-based energy channel and a more complex food web ***,root presence had a limited impact on the nematode community composition and ecological *** nematodes surface assembly,soil depth did not affect nematode trophic group composition or ecological *** findings highlight the importance of litter inputs in shaping soil nematode community structure and regulating soil energy channel.

关键词： Litter addition Root exudates Nematode community composition Soil depth Nematode ecological index

Hydrothermal synthesis of crystalline α-/β-MnO_(2) nanorods via γ-MnOOH nanorod precursors

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Frontiers of Chemical Science and Engineering 2007年第4期1卷 365-371页

作者： zhang weixin REN Xiangbin YANG Zeheng WANG Hua WANG Qiang HUANG Fei School of Chemical Engineering Hefei University of TechnologyHefei 230009China Anhui Key Laboratory of Controllable Chemical Reaction&Material Chemical Engineering Hefei 230009China

The crystalline α-MnO_(2) and β-MnO_(2) nanorods have been successfully prepared via a facile hydrothermal method from γ-MnOOH nanorods precursor,*** samples were characterized by means of X-ray diff raction(XRD),transmission electron microscopy(TEM),high-resolution transmission electron microscopy(HRTEM),field emission scanning electron microscope(FESEM)and Fourier transformed infrared spectra(FTIR).The morphology and structure of γ-MnOOH nanorods precursors have a great influence on the crystal structure of the obtained *** α-MnO_(2) nanorods are prepared from the 100℃ γ-MnOOH precursor,while the β-MnO_(2) nanorods are obtained from the 150℃ γ-MnOOH precursor,***,the catalytic activity of the prepared α-MnO_(2) and β-MnO_(2) nanorods for the H2O2 decomposition has been investigated comparatively,and the latter shows better catalytic activity.

关键词： α-MnO_(2) β-MnO_(2) nanorod synthesis catalytic efficiency

Design and preparation of 3D metal/transition metal oxide core-shell micro/nanostructured array electrodes for high performance lithium ion batteries

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Design and preparation of 3D metal/transition metal oxide co...

平面叶栅多凹槽叶顶倾斜圆柱孔气膜冷却与气动特性研究

中国化学会第十届全国无机化学学术会议

作者： weixin zhang School of Chemistry and Chemical Engineering Hefei University of Technology

Transitional metal oxides have received much attention given its high capacity and reliable safety as conversion-type anode materials in lithium-ion batteries. However, the planar electrodes made of powder-form transitional metal oxides usually suffer from poor electrical conductivity, large volume change and fast deterioration of capacity. Our recent research shows that the electrodes constructed of transitional metal oxides micro-nanostructured shell grown on 3 D metal nanoarray core can ensure that micro-nanostructured transitional metal oxides shell has direct electron transport pathway to their ‘own’ current collector（e.g. the metal nanorod core）, which can facilitate rapid and high throughput transport for electrons by reducing interfacial resistance significantly. 3 D metal/transitional metal oxides core-shell micro-nanostructured arrays as anode for lithium-ion batteries can reduce initial irreversible capacity fading significantly and improve rate capability and cycling stability. The presentation will report preparation of 3 D metal/transitional metal oxides core-shell micro-nanostructured array electrodes through designing and tuning the equilibrium between the hydrolysis reaction of external metallic ions and the etching reaction of metal substrates by hydrogen ions from the hydrolysis under hydrothermal condition based on ‘self-sustained cycle of hydrolysis and etching strategy’. The results may shed light on developing new electrode systems for high performance lithium ion batteries.

关键词： Lithium ion batteries Transition metal oxides ·Core-shell Micro-/nanostructured arrays Electrodes

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西安交通大学学报 2023年第9期57卷 10-21页

作者：贾哲李冯张韦馨刘钊石䶮丰镇平西安交通大学能源与动力工程学院西安710049 中国联合重型燃气轮机技术有限公司北京100015

为提高燃气透平动叶叶顶的气膜冷却有效度,并减少由叶顶泄漏流引起的气动损失,对带倾斜圆柱孔的多凹槽叶顶冷却与气动特性进行了研究,试验测量了多凹槽叶顶的气膜冷却特性,并对其气动特性进行了数值模拟分析。首先采用压力敏感漆技术,在... 详细信息

为提高燃气透平动叶叶顶的气膜冷却有效度,并减少由叶顶泄漏流引起的气动损失,对带倾斜圆柱孔的多凹槽叶顶冷却与气动特性进行了研究,试验测量了多凹槽叶顶的气膜冷却特性,并对其气动特性进行了数值模拟分析。首先采用压力敏感漆技术,在4种吹风比(0.5、1.0、1.5和2.0)下,测量了4种多凹槽叶顶(凹槽数分别为1、2、3和4个)气膜冷却性能的变化规律;然后经湍流模型验证,采用与试验数据吻合最好的SST k-ω模型,分析了多凹槽叶顶的流场结构及气动损失。研究结果表明:多凹槽叶顶在叶顶区域前、中部具有更优良的气膜冷却有效度,同时对肩壁也有良好保护作用;由于多凹槽叶顶的肋能够阻挡冷气向下游流动,肋后能形成涡卷吸冷气,因而能够提高肋前和肋后的气膜冷却有效度;相较于单凹槽叶顶,多凹槽叶顶的气动损失较低,其中三凹槽叶顶的总压损失系数最小,最多比单凹槽叶顶的低9.3%。

关键词：燃气轮机多凹槽叶顶气膜冷却压力敏感漆气动特性