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Search Results: 1 - 10 of 139229 matches for " 简惠云LIANG Hong-yan "
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基于消费者选择偏好的可替代品订货策略
Ordering policy for substitutable products based on consumer preference bias

梁红燕, 许民利,
LIANG Hong-yan
, XU Min-li, JIAN Hui-yun

- , 2015, DOI: 10.6040/j.issn.1671-9352.0.2014.406
Abstract: 摘要: 基于消费者选择偏好,建立了相应零售商利润-订单量的条件风险价值模型。以零售商利润为最优化目标,在市场总需求不确定时,考虑零售商风险偏好、消费者选择偏好及两种产品的可替代性,研究零售商的最优订货策略。研究结果表明,当产品订货量在一定范围时,产品替代性将失去作用:当两种产品总订货量在一定范围时,产品最优订货量随顾客偏好系数及产品替代系数的提高而增大,随替代产品顾客偏好系数和零售商风险规避程度的提高而减小:产品与替代产品间的顾客偏好系数差异越大,两产品总订货量越大。
Abstract: Based on consumer preference bias, a profit-order quantity decision model with stochastic demand under Conditional Value-at-Risk(CVaR)criterion was established. In order to optimize retailer's profit, when the demand is uncertain, the optimal ordering policy with the consideration of retailer's risk preference, consumer preference bias and product substitutability were discussed. The results show that when the order is in certain range, the ordering policy depends on consumer preference bias and not on the product substitutability. When the total order is in certain range, the optimal ordering quantity is positively correlated to the consumer preference bias factor and substitutable factor, and it has a negative correlation to the preference bias of another substitutable product and the retailer's risk averse. If the consumer bias between substitute products is bigger, the total ordering quantity will also be bigger
不锈钢网阴极微生物燃料电池的产电性能研究
Electricity Generation of Microbial Fuel Cell Using Stainless Steel Mesh as Cathode

代红艳,杨慧敏,刘 宪,,宋秀丽,梁镇海
DAI Hong-yan
, YANG Hui-min, LIU Xian, JIAN Xuan, SONG Xiu-li, LIANG Zhen-hai

- , 2016, DOI: 10.13208/j.electrochem.150928
Abstract: 摘要 构建了一个以曝气池污泥为阳极接种微生物、碳毡为阳极、无任何修饰的不锈钢网为阴极的双室微生物燃料电池. 通过输出电压、功率密度以及电化学阻抗等考察了阴极面积对电池产电性能的影响,并对电池的长期运行稳定性进行评价. 研究结果表明,不锈钢网作为微生物燃料电池的阴极性能稳定. 当不锈钢网面积为2 × 2 cm2时,最大输出电压达到0.411 V,功率密度为0.303 W?m-2,内阻841 Ω,极化内阻80 Ω. 增大阴极面积至2 × 4 cm2,最大输出电压能达到0.499 V,内阻减小至793 Ω. 不锈钢网价格便宜,具有长期运行稳定性,适宜做MFCs的阴极.
In the present work, a dual-chamber microbial fuel cell (MFC) was constructed with aeration tank sludge as an inoculum, carbon felt as an anode and stainless steel mesh without any modification as a cathode. The influence of the cathode size was investigated in terms of voltage output, power generation and electrochemical impedance. The long-term durability of the stainless steel mesh cathode was also evaluated. Results showed that the stainless steel mesh exhibited satisfactory long-term durability as MFC cathode. When the stainless steel mesh size was 2 × 2 cm2, the maximum output voltage, power density, the internal resistance and the polarization resistance were 0.411 V, 0.303 W?m-2, 841 Ω and 80 Ω, respectively. Increasing the cathode size to 2 × 4 cm2, the maximum output voltage could reach 0.499 V, and the internal resistance reduced to 793 Ω. These studies demonstrated that the stainless steel mesh was suitable for MFC cathode because of its durability and low price
Preparation and Characterization of Tetragonal BaTiO3 Thin Film with Self-assembled Monolayers Technique
TAN Guo-Qiang,LIU Jian,MIAO Hong-Yan,HE Zhong-Liang,XIA Ao
无机材料学报 , 2009, DOI: 10.3724/sp.j.1077.2009.00749
Abstract: Self-assembled monolayers (SAMs) technique based on traditional liquid phase deposition and bio-inspired theory is one of the most promising processes for preparing inorganic thin films. Using octadecyl-trichloro-silane (OTS) as stencil, tetragonal BaTiO3 thin film was successfully prepared on glass wafers in the solution consisting of (NH4)2TiF6, Ba(NO3)2 and H3BO3 with SAMs technique. Hydrophilic characteristic mensuration of glass wafers and photographs of atomic force microscopy (AFM) indicate that the hydrophobe substrate changes into hydrophile by UV iradiation, and a modification of OTS-SAM is changed by UV light. Photographs of metallographic microscope indicate that the surface of BaTiO3 thin film deposited on OTS-SAM is smooth and homogeneous, and an induction of BaTiO3 thin film deposition is directed by OTS-SAM. X-ray diffraction (XRD) and field-emission scanning electron microscope (FE-SEM) results show that the BaTiO3 thin film with well-crystalline tetragonal phase is successfully prepared after annealing at 600 n air for 2h. BaTiO3 thin film grows on glass substrate with a rod-like morphology, the length of the nanowire is in the range from 500nm to 1000nm, which is composed of nanosized grains of around 100nm. The formation mechanism of OTS-SAM and BaTiO3 thin film is carefully discussed.
Uniqueness of Transcendental Meromorphic Functions with Their Nonlinear Differential Polynomials Sharing the Small Function
Hong-Yan Xu
International Journal of Mathematics and Mathematical Sciences , 2007, DOI: 10.1155/2007/84961
Abstract: We deal with some uniqueness theorems of two transcendental meromorphic functions with their nonlinear differential polynomials sharing a small function. These results in this paper improve those given by C.-Y. Fang and M.-L. Fang (2002), by Lahiri and Pal (2006), and by Lin and Yi (2004).
(E)-4-Methoxy-N′-(4-nitrobenzylidene)benzohydrazide methanol monosolvate
Hong-Yan Ban
Acta Crystallographica Section E , 2010, DOI: 10.1107/s160053681004701x
Abstract: The hydrazone molecule of the title compound, C15H13N3O4·CH4O, is nearly planar, with a dihedral angle between the two benzene rings of 1.2 (4)°. The molecule exists in a trans configuration with respect to the central methylidene unit. In the crystal, the benzohydrazide and methanol molecules are linked through intermolecular O—H...O, O—H...N and N—H...O hydrogen bonds, forming chains along the a axis.
(E)-N′-(5-Bromo-2-methoxybenzylidene)isonicotinohydrazide
Hong-Yan Ban
Acta Crystallographica Section E , 2011, DOI: 10.1107/s1600536811017910
Abstract: The asymmetric unit of the title compound, C14H12BrN3O2, contains two independent molecules in which the dihedral angles between the benzene ring and the pyridine ring are 24.4 (6) and 23.7 (6)°. The molecules exist in a trans configuration with respect to the central methylidene units. In the crystal, molecules are linked through intermolecular N—H...O hydrogen bonds, forming chains along the a axis.
Preparation and Characterization of Tetragonal BaTiO3 Thin Film with Self-assembled Monolayers Technique
四方相BaTiO3薄膜的自组装制备与表征

TAN Guo-Qiang,LIU Jian,MIAO Hong-Yan,HE Zhong-Liang,XIA Ao,
谈国强

无机材料学报 , 2009,
Abstract: 以(NH4)2TiF6、 Ba(NO3)2 和H3BO3为主要原料, 采用自组装单层膜(SAMs)技术, 以三氯十八烷基硅烷(octadecyl-trichloro-silane, OTS)为模版, 在玻璃基片上制备了四方相钛酸钡晶态薄膜. 改性基板的亲水性测定与原子力显微镜(AFM)测试表明, 紫外光照射使基板由疏水转变为亲水, 能够对OTS-SAM起到修饰作用. 金相显微镜观察结果显示,OTS单分子膜指导沉积的薄膜样品表面均匀, 表明OTSSAM对钛酸钡薄膜的沉积具有诱导作用; X射线衍射(XRD)与扫描电镜(SEM)表征显示, 空气中600℃下保温2h实现了薄膜由非晶态向四方相BaTiO3晶态薄膜的转化过程, 制备的钛酸钡薄膜在基板表面呈纳米线状生长, 线长约在500~1000nm之间, 相互连接的晶粒大小约为100nm. 文章同时对自组装单层膜和钛酸钡薄膜的形成机理进行了探讨.
花背蟾蜍♀×中华大蟾蜍♂受精过程的细胞学研究Cytology Study on the Cross Fertilization between Bufo raddei and Bufo bufl
梁桂霞,陈永龙,刘红岩LIANG Gui-Xia,CHEN Yong-Long,LIU Hong-Yan
遗传 , 1997,
Abstract: 对以花背蟾蜍作母本、中华大蟾蜍作父本的受精卵从受精后10分钟到180分钟期间进行了细胞学研究。结果表明,杂交受精卵与花背蟾蜍本种受精卵发育过程基本一致。在18~20℃室温下人工受精后20~30分钟精子入卵;60~70分钟雌雄原核形成,80~100分钟雌雄原核相互移近相结;110~140分钟,雌雄原核结合,形成合子核;150~180分钟首次卵裂中期图形建成。整个受精过程中,实验组比对照组落后20分钟,此外,阶段内受精卵发育的一致性不如对照组。
Determination of Vacuoles from the Blue-green Algae by Squash Method
压片法检查蓝藻液泡

GUO Hou-Liang,ZHAO Yi-Jun,WU Hong-Yan,
郭厚良
,赵以军,吴红艳

植物科学学报 , 2001,
Abstract: The blue-green alga Anabaena sp. PCC 7120 was grown in the medium containing 0.1 mol/L NaCl for 4 d and over 90% of cells became vacuola- ted. If they were grown in the common condition for over month, only a part of cells began vacuolation. The cultures were dropped on slide and a filter paper was put on the cover slip to absorb the surplus water. A light pressure on the cover slip was made by a thumb to break some vacuolated cells. Some vacuoles were released from the vacuolated cells. The vacuoles were fully transparent, varied in size, they have not be showed under general microscope but under phase contrast microscope. Two kinds of cell vacuolations by salt inducing or by aging have parallelism.
Self-assembled Monolayers Preparation and Characterization of BiFeO3 Thin Films
TAN Guo-Qiang,BO Hai-Yang,MIAO Hong-Yan,XIA Ao,HE Zhong-Liang
无机材料学报 , 2010, DOI: 10.3724/sp.j.1077.2010.00083
Abstract: Using OTS as the template, Bi(NO3)3 and Fe(NO3)3 as the raw material and citric acid as the complexing agent, BiFeO3 crystalline film was prepared on the glass substrate by the selfassembled monolayer technique. Effects of calcination and deposition temperatures on the BiFeO3 film were explored. The physical phase composition, the microstructure and surface morphology of BiFeO3 film were characterized by the testing methods, such as XRD, SEM and AFM. The energy detecting spectrum (EDS) provided the supporting evidence for the chemical composition of BiFeO3 film. The results show that the pure BiFeO3 crystalline film is prepared by the self-assembled monolayer technique after calcined at 600℃. In the deposition temperature range from 70℃ to 80℃, the BiFeO3 film has better crystallinity with the homogeneous and dense surface.
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