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组合管径圆弧翅片换热性能的数值模拟

制冷与空调 2017年第7期17卷 77-82页

作者：高保华李喜武张立智吴洪金王飞青岛海尔空调器有限总公司

针对空调器室内机换热器空气侧的流动和换热问题,利用FLUENT软件,本文研究了开缝圆弧翅片以及组合管径开缝圆弧翅片对换热器的换热量和空气侧压降的影响,并与原开缝三折翅片换热器进行比较。结果表明,开缝圆弧翅片换热器的换热量大于原... 详细信息

针对空调器室内机换热器空气侧的流动和换热问题,利用FLUENT软件,本文研究了开缝圆弧翅片以及组合管径开缝圆弧翅片对换热器的换热量和空气侧压降的影响,并与原开缝三折翅片换热器进行比较。结果表明,开缝圆弧翅片换热器的换热量大于原开缝三折翅片换热器,而空气侧压降略有增大。随着小管径数量增大,开缝圆弧翅片换热器的换热量逐渐减小,但压降也逐渐减小。相比于开缝三折翅片换热器,当开缝圆弧翅片换热器为10根小管时,其压降增大5%左右,但换热量却有2%左右的提高,且铜管材料节省了14.5%,有很好的应用前景。

关键词：换热器圆弧翅片组合管径数值模拟

Role of biologic components in a novel floating-bed combining Ipomoea aquatic, Corbicula fluminea and biofilm carrier media

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Frontiers of Environmental Science & Engineering 2014年第2期8卷 215-225页

作者： Hailiang SONG Xianning li Wei li xiwu LU School of Energy and Environment Southeast University Nanjing 210096 China Engineering Research Center for Water Environmental Protection of Taihu Lake Southeast University Wuxi Branch Wuxi 214135 China

A novel floating-bed incorporated with water spinach （Ipomoea aquatica）, Asiatic clam （Corbicula fluminea）, and carrier media supported biofilm was developed for eutrophic water purification. The contribu- tions of each biologic component to the removals of total nitrogen （TN）, total phosphorus （TP） and Chl.a were examined. The nutrient removals due to the direct uptake by either water spinach or Asiatic clam were less than 10%, suggesting a negligible role of biologic assimilation and leaving the biofilm as the indispensable biologic compo- nent in the floating-bed. Chl.a was reduced mainly by Asiatic clams via filter-feeding. Meanwhile, the digestion and excretion of Asiatic clams benefited the proliferation of nitrifying and denitrifying bacteria, resulting in the improvement of TN removal. In summary, the synergetic effects of water spinach, Asiatic clams and biofilms would promote the eutrophic water treatment performance of floating-bed in comparison with the conventional floating- bed with vegetation as the single biologic component.

关键词： floating-bed Corbicula fluminea biofilm cartier eutrophication

Type-2 fuzzy description logic

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Frontiers of Computer Science 2011年第2期5卷 205-215页

作者： Ruixuan li Kunmei WEN xiwu GU Yuhua li Xiaolin SUN Bing li Intelligent and Distributed Computing Laboratory School of Computer Science and Technology Huazhong University of Science and Technology Wuhan 430074 China State Key Laboratory of Software Engineering Wuhan University Wuhan 430072 China

Description logics （DLs） are widely employed in recent semantic web application systems. However, classical description logics are limited when dealing with imprecise concepts and roles, thus providing the motivation for this work. In this paper, we present a type-2 fuzzy attributive concept language with complements （ALC） and provide its knowledge representation and reasoning algorithms. We also propose type-2 fuzzy web ontology language （OWL） to build a fuzzy ontology based on type- 2 fuzzy ALC and analyze the soundness, completeness, and complexity of the reasoning algorithms. Compared to type-1 fuzzy ALC, type-2 fuzzy ALC can describe imprecise knowledge more meticulously by using the membership degree interval. We implement a semantic search engine based on type-2 fuzzy ALC and carry out experiments on real data to test its performance. The results show that the type-2 fuzzy ALC can improve the precision and increase the number of relevant hits for imprecise information searches.

关键词： description logic (DL) type-2 fuzzy attributive concept language with complements (ALC) fuzzy ontology reasoning semantic search engine

A Novel Hybrid Method to Analyze Security Vulnerabilities in Android Applications

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Tsinghua Science and Technology 2020年第5期25卷 589-603页

作者： Junwei Tang Ruixuan li Kaipeng Wang xiwu Gu Zhiyong Xu School of Computer Science and Technology Huazhong University of Science and TechnologyWuhan 430074China Math and Computer Science Department Suffolk UniversityBostonMA 02101USA and also with Shenzhen Institute of Advanced TechnologyChinese Academy of ScienceShenzhen 518055China

We propose a novel hybrid method to analyze the security vulnerabilities in Android *** method combines static analysis,which consists of metadata and data flow analyses with dynamic analysis,which includes dynamic executable scripts and application program interface *** hybrid method can effectively analyze nine major categories of important security vulnerabilities in Android *** design dynamic executable scripts that record and perform manual operations to customize the execution path of the target *** dynamic executable scripts can replace most manual operations,simplify the analysis process,and further verify the corresponding security *** successfully statically analyze 5547 malwares in Drebin and 10 151real-world *** average analysis time of each application in Drebin is 4.52 s,whereas it reaches 92.02 s for real-word *** system can detect all the labeled vulnerabilities among 56 labeled *** dynamic verification shows that our static analysis accuracy approximates 95%for real-world *** show that our dynamic analysis can effectively detect the vulnerability named input unverified,which is difficult to be detected by other *** addition,our dynamic analysis can be extended to detect more types of vulnerabilities.

关键词： Android security vulnerability analysis static analysis dynamic analysis

Inbreeding Depression on Growth and Survival of Full-Sib Family of Manila Clam(Ruditapes philippinarum)

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Journal of Ocean University of China 2017年第1期16卷 145-150页

作者： HUO Zhongming li Na ZHANG Xuekai li Ying YAN xiwu YANG Feng College of Fisheries and life Science Dalian Ocean UniversityDalian 116023P.R.China Engineering Research Center of Shellfish Culture and Breeding in liaoning Province Dalian Ocean UniversityDalian 116023P.R.China

In present study, the inbreeding depression(ID) of growth and survival of Manila clam(Ruditapes philippinarum) was investigated at larval and juvenile stages. Nine inbred families(A_2, B_2, C_2, D_2, E_2, F_2, G_2, H_2 and I_2) were established by mating within nine full-sib families with expected inbreeding coefficient of 0.25. Inbred families showed significant differences in shell length and hatching rate of D-larvae(straight-hinged larvae). The larvae of the nine inbred families grew slower than those of control group(CG), and their ID value ranged from 0.81% ± 6.09% to 16.10% ± 1.49%. The ID value of larval survival rate varied between 27.47% ± 9.36% and 70.50% ± 13.66%. The ID was also detected for juvenile growth in A_2, B_2, C_2, and D_2, which ranged from 4.60 ± 2.21 to 17.71 ± 7.73. The A_2 family maintained the highest juvenile survival rate, whereas the other inbred families exhibited ID values varying between 62.79% ± 4.54% and 96.14% ± 0.87%. The linear relationship of estimated ID between growth and survival was negatively correlated(R =-0.434, P < 0.05). The results of this study suggested that the ID of growth was common at the larval stage but was less prevalent at juvenile stage. In contrast, the ID of survival increased from larval to juvenile stage. A better understanding of the effect of inbreeding may aid to selective breeding of Manila clam.

关键词： Ruditapes philippinarum growth survival inbreeding depression

自动化专业“实践教学链”与培养创新能力的研究

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农业网络信息 2015年第5期 148-150页

作者：王洋朱凤武李喜武潘世强孙上媛吉林农业大学工程技术学院吉林长春130118

实践教学是培养学生综合素质的重要环节,是提高学生的创新能力的途径。本文对自动化专业的实践教学链的构建进行了探讨,着重分析了实践教学改革的方法,并根据自动化专业学生的特点,构建了实践教学体系,有利于学生创新能力的培养。

关键词：自动化实践教学教学改革

自然时效对Al-6.5Zn-2.3Mg-2.2Cu合金厚板组织性能的影响

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轻合金加工技术 2024年第6期52卷 33-40页

作者：左德运温凯任伟才李锡武李志辉谭艺哲东北轻合金有限责任公司黑龙江哈尔滨150060 中国有研科技集团有限公司有色金属材料制备加工国家重点实验室北京100088 有研工程技术研究院有限公司北京101407

商用7×××系铝合金产品人工时效前一般会经历自然时效,自然时效时间的长短直接决定产品的生产制备流程。本试验研究了工业化制备的Al-6.5Zn-2.3Mg-2.2Cu合金厚板在不同的自然时效阶段经人工时效处理后的组织及性能,并重点分析了短时... 详细信息

商用7×××系铝合金产品人工时效前一般会经历自然时效,自然时效时间的长短直接决定产品的生产制备流程。本试验研究了工业化制备的Al-6.5Zn-2.3Mg-2.2Cu合金厚板在不同的自然时效阶段经人工时效处理后的组织及性能,并重点分析了短时自然时效(0.125~21 d)及长时自然时效(30~360 d)对合金不同时效状态的影响。研究结果表明:自然时效0.125~21 d,T6态合金的强度持续降低,抗拉和屈服强度的降幅分别为14 MPa和17 MPa,伸长率在13.6%~15.6%的范围内波动;基体析出相主要为GPII区和η′相,晶界析出相呈断续分布。自然时效3~360 d时,T6态合金的强度、伸长率和断裂韧性均在一定范围内波动,无明显的变化规律,基体析出相主要为η′相且分布密集,晶界析出相呈断续分布。自然时效3~105 d时,T76态合金的拉伸性能和断裂韧性同样在一定范围内波动,无明显的变化规律,基体析出相尺寸粗大、分布分散,主要为η′相和η相,晶界析出相同样呈断续分布。

关键词： Al-6.5Zn-2.3Mg-2.2Cu合金自然时效析出特征力学性能

Mass Selection for Fast Growth in the Third Generation of the Orange line of the Manila Clam Ruditapes philippinarum

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Journal of Ocean University of China 2019年第6期18卷 1481-1485页

作者： liANG Jian HUO Zhongming GUO Yongjun li Yongren YAN xiwu Engineering Research Center for Shellfish Culture and Breeding of liaoning Province College of Fisheries and Life ScienceDalian Ocean UniversityDalian 116023China Tianjin Key Laboratory of Aqua-Ecology and Aquaculture Department of Fishery SciencesTianjin Agricultural UniversityTianjin 300384China Tianjin Marine Ranching Technical Engineering Center Tianjin 300457China

The Manila clam Ruditapes philippinarum is natively distributed along the Pacific coast of Asia,where it is one of the most important bivalve species for local *** species has been intentionally introduced due to its high adaptability to various coastal environments and is currently widely cultivated in Europe and North *** have initiated a selective breeding program to improve the growth rate of the Manila clam since 2007,and a full-sib family with orange shell color was *** family features high survival but slow ***,two generations of mass selection were conducted in this family by 10% upward selection for faster *** 2011,three types of lines were produced by selecting the breeder from the second-generation of selected *** lines are SS(subject to three generations of selection for growth in shell length),SC(selected for the second but not the third generation),and C(randomly sampled individuals from the national population).The genetic parameters of the shell length including hR^2(realized heritability),SR(selection response),and GG(genetic gain)were *** showed that the shell length of the SS line was significantly larger than those of the SC and C lines at all developmental stages(Pline in selective *** level of GG improvement was encouraging and consistent with the previous *** inbreeding depressions in the shell length were observed in the SS and SC lines at all sampling *** of the results indicate that maintaining selection pressure in successive generations may be effective in the selective breeding program of this family.

关键词： Ruditapes philippinarum mass selection realized heritability genetic gain inbreeding depression

Resistance and fitness costs in diamondback moths after selection using broflanilide, a novel meta-diamide insecticide

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Insect Science 2022年第1期29卷 188-198页

作者： Xi Sun Rui Wei linhong li Bin Zhu Pei liang xiwu Gao Department of Entomology China Agricultural UniversityBeijing100193China

The diamondback moth (DBM) Plutella xylostella (L.) (Lepidoptera: Plutellidae) is an insect pest found around the world that feeds on cruciferous crops. The DBM has become resistant to most insecticides in current use in the field. Broflanilide is a novel meta-diamide insecticide that binds to a new site on the γ-aminobutyric acid receptor and very efficiently protects against most pests in the order Lepidoptera, including DBM. In this study, the resistance of a laboratory-bred susceptible strain of DBM to broflanilide and the fitness costs posed by broflanilide to the DBM were evaluated. The DBM had no obvious resistance to broflanilide after 10 generations of selection. The realized heritability h2 was 0.033, suggesting a low risk of resistance developing in this strain. The F10 generation had no cross-resistance to the insecticides abamectin and endosulfan (which target the γ-aminobutyric acid receptor) and chlorantraniliprole (which targets a non-γ-aminobutyric acid receptor). The specific activities of important detoxification enzymes (cytochrome P450 monooxygenase, esterase, and glutathione S-transferase) were not obviously altered. However, the larval stage was prolonged and the adult stage was shortened significantly in F11 generation than the F0 generation. The total preoviposition period TPOP significantly prolonged 1.90 d in F11 generation. The fitness value Rf (0.93) was lower for the F11 generation than the F0 generation. The results indicated that long-term exposure to broflanilide exerts clear fitness costs in the DBM. This information will be useful in identifying reasonable broflanilide application guidelines for managing broflanilide resistance in the DBM.

关键词： broflanilide cross-resistance detoxifying enzymes fitness cost Plutella xylostella