Integrated heat and power dispatch model for wind-CHP system with solid heat storage device based on robust stochastic theory

This paper built a combined heat and power (CHP) dispatch model for wind-CHP system with solid heat storage device (SHS) aiming at minimizing system coal consumption, and set system demand-supply balance and units’ operation conditions as the operation constraints. Furthermore, robust stochastic optimization theory was used to describe wind power output uncertainty. The simulation result showed that SHS increased CHP peak-valley shifting capability and reduced abandoned wind rate from 12% to 6%, and reduced 5% coal consumption, compared with the original system operation by flexible charging electric power and heating. The payback period of employing SHS in wind-CHP system is far shorter than SHS expected service life.     

Fingerprint Core Location Algorithm Based on Sliding Window

In order to improve the efficiency of the fingerprint core location algorithm, a fingerprint core location method using sliding window on the basis of core location algorithm with the complex filter was proposed. The local region of the fingerprint image was extracted by a fixed-size window sliding in the region of the fingerprint image, and the selected local region by window as the calculation object is used to detect the core. The experiment results show that the method cannot only effectively detect fingerprint core, but also improve the efficiency of the detection algorithm comparing with the global fingerprint core location detection algorithm.     

1996-2016年五味子在国产保健食品中的应用与分析

目的 分析五味子21 a间在国产保健食品中作为原料的应用情况,为进一步研发五味子保健食品提供参考.方法 利用回顾性调查方法,抽取国家食品药品监督管理总局(CFDA)网站中1996—2016年已注册的保健食品信息,建立五味子保健食品专题数据库,分析五味子相关保健食品的功能分布、与之配伍的中药种类、频次、功效成分(或标志性成分)、地区分布及年代分布等.结果 1996—2016年期间含五味子的国产保健食品共有351个,涉及功能20种,配方原料数量最多6种,与五味子配伍使用的原料前5位为枸杞子、酸枣仁、人参、葛根、黄芪,功效成分涉及118种,申请地中前5位依次为北京市、广东省、陕西省、吉林省及黑龙江省.结论 含五味子保健食品的开发总量不足,档次较低,接近食品形态的剂型较少,没有形成基于五味子医药文化及民俗文化的品牌优势.     

角膜神经纤维形态参数变化在早期T2DM视网膜病变的应用价值

目的探讨角膜神经纤维形态参数变化在早期发现Ⅱ型糖尿病(T2DM)视网膜病变的应用价值.方法选取T2DM患者236例,其中合并糖尿病视网膜病变114例(Ⅰ期36例,Ⅱ期50例,Ⅲ期28例),无糖尿病视网膜病变122例;另收集同期健康志愿者120例为对照组.使用共焦激光角膜显微镜检测角膜神经纤维形态变化,分析与T2DM视网膜病变临床指标的关系.结果视网膜病变组神经长度、神经纤维密度、神经分支密度明显低于无视网膜病变组和对照组,神经纤维弯曲度明显高于无视网膜病变组和对照组,差异均具有统计学意义(P0.05).无视网膜病变组神经纤维弯曲度、神经分支密度明显高于对照组,差异具有统计学意义(P0.05);无视网膜病变组与对照组神经长度、神经纤维密度之间差异均无统计学意义(P0.05).Ⅲ期视网膜病变患者神经长度、神经纤维密度、神经分支密度均明显低于Ⅰ期和Ⅱ期患者,神经纤维弯曲度明显高于Ⅰ期和Ⅱ期患者,差异均具有统计学意义(P0.05).视网膜病变组患者病程明显长于无视网膜病变组,空腹C肽、GLU明显低于无视网膜病变组,差异均具有统计学意义(P0.05).T2DM患者病程与角膜神经纤维长度和分支密度均呈负相关;T2DM患者空腹C肽水平与角膜神经纤维弯曲度呈负相关,与神经纤维密度呈正相关.结论 T2DM视网膜病变患者角膜神经纤维形态参数发生异常变化,有助于早期发现视网膜病变;对病程较长和空腹C肽水平较低的T2DM患者应用价值更高.     

向海自然保护区昆虫资源调查

湿地是一种特殊的土地资源和生态环境,具有调节水分循环、维持湿地特有动植物生存等基本生态功能.调查向海国家级自然保护区昆虫资源,共采集昆虫114种,隶属12目63科.在物种组成上,以鳞翅目、鞘翅目和直翅目为主要优势类群,主要优势种有中华蚱蜢(Acrida cinerca Thunberg)、黑足婪步甲(Harpalus roninus Bate)、榆紫叶甲(Ambrostoma quadriimpressum(Motschulsky)).沙丘榆林生境有11目51科95种,其中,鞘翅目有16科31种;芦苇沼泽生境有9目33科56种,其中,鳞翅目有9科20种;羊草草原生境有8目32科67种,其中,鳞翅目有9科17种.对向海自然保护区主要害虫种类及资源昆虫进行了初步分析.     

黑果腺肋花楸组培繁殖培养基筛选

以黑果腺肋花楸茎尖和嫩叶为外植体,在MS培养基中加入不同种类与用量的生长调节剂,筛选黑果腺肋花楸组织培养繁殖培养基.结果表明:黑果腺肋花楸愈伤组织诱导效果较好的培养基为MS+6-BA 3.0 mg/L+NAA 0.5 mg/L;不定芽诱导效果较好的培养基为MS+6-BA 1.0 mg/L+NAA 0.1 mg/L;不定根诱导效果较好的培养基为1/2 MS+IBA 0.05 mg/L;以泥炭土、松针、砂砾(2∶1∶1)为基质时,组培苗移栽成活率较高(成活率96%).     

表面活性剂及其复配体系对漆酶活性和稳定性的影响

本文研究了5种表面活性剂Brij-35、Tween-80、TX-100、AOT和甜菜碱对漆酶活性和稳定性的影响,探讨漆酶最适宜的反应温度和pH值,并通过Brij-35与其他4种表面活性剂组建不同类型的复配体系,分析在表面活性剂复配体系中漆酶活性与稳定性的变化情况。结果表明,不同类型和浓度的表面活性剂对漆酶催化性能的影响各异,影响方式主要取决于其头部基团的离子性质;加入表面活性剂后,漆酶的最佳反应温度(40℃)没有改变,最佳pH值(3.0)基本没变,但添加AOT的漆酶最佳pH值迁移到3.5;在合适条件下,表面活性剂可以提高漆酶的活性和稳定性,在4种复配体系中,非离子型与非离子型复配的表面活性剂(Brij-35/Tween-80,Brij-35/TX-100)最有利于漆酶的稳定性。     

Microstructure and corrosion behavior of Al<Subscript>3</Subscript>Ti/ADC12 composite modified with Sr

In this study, we investigated the effect of the addition of Sr (0wt%, 0.1wt%, 0.2wt%, and 0.3wt%) on the microstructure and corrosion behavior of Al₃Ti/ADC12 composite by optical microscopy, X-ray diffraction, scanning electron microscopy, and energy diffraction spectroscopy. The results reveal that the α-Al phases were nearly spherical and 40 μm in size and that the eutectic Si phases became round in the composite when the Sr content reached 0.2wt%. The Al₃Ti particles were distributed uniformly at the grain boundary. The results of the corrosion examination reveal that the Al₃Ti/ADC12 composite exhibited a minimum corrosion rate of 0.081 g·m–2·h–1 for an Sr content of 0.2wt%, which is two thirds of that of unmodified composite (0.134 g·m–2·h–1). This improved corrosion resistance was due to galvanic corrosion, which resulted from the low area ratio of the cathode to anode regions. This caused a low-density corrosion current in the composite, thereby yielding optimum corrosion resistance.     

Corrosion behavior of high-strength spring steel for high-speed railway

The corrosion resistance and evolution of corrosion products in medium-carbon high-strength spring steels were investigated in a neutral salt spray (5wt% NaCl solution). A formation model of γ-FeOOH and a transformation model describing the conversion of γ-FeOOH to α-FeOOH were constructed. The results indicated that, at the initial corrosion stage, the corrosion resistance was gradually improved with the addition of Cr; however, with the addition of alloying element V, the corrosion resistance decreased. These results were attributed mainly to the initial corrosion stage being closely related to the matrix microstructure parameters such as grain-boundary character and dislocation density. After the rust layer was formed at a later corrosion stage, the corrosion resistance was reinforced with the addition of Cr and V because Cr strongly influenced the composition, structure, and morphology of the corrosion products. The results presented herein show that Cr was conducive to the transformation of γ-FeOOH into α-FeOOH. Moreover, V and Cr exhibited obvious synergy and were enriched in the inner layer of the corrosion products.     

Complementation in the composition of steel slag and red mud for preparation of novel ceramics

A method for preparing novel ceramics was developed in this study. Different ratios red muds were added to steel slags to optimize the preparation of novel ceramics by a traditional ceramic preparation process. The sintering mechanism, microstructure, and performance were studied by X-ray diffraction techniques, scanning electron microscopy, and combined experiments of linear shrinkage, water absorption, and flexural strength. The results confirmed that red mud can reduce the volumetric instabilities through the complementarity of red mud and ferroalloy slag. The crystal phases in the ceramics are all pyroxene group minerals, including diopside ferrian, augite, and diopside. The flexural strength of the ceramic that contains 40wt% red mud and was prepared at the optimal sintering temperature (1140℃) is greater than 93 MPa; its corresponding water absorption is less than 0.05%.