在质和量的统一中发展股份经济

大力推进国有企业的股份制改造，是实现国有经济战略性重组的有效途径，“抓大放小”是国有企业股份制改造的有效策略；应注重股份经济的内质，构建规范化的股份经济体系

基于最优组合赋权模糊物元模型的节水灌溉项目综合评价

在总结现有研究与评价方法的基础上,构建了基于最优组合赋权模糊物元模型的节水灌溉项目评价模型。首先,采用G1法和改进熵权法确定指标的主客观权重;然后,运用最小鉴别信息原理进行组合赋权,得到兼顾主客观因素的权重。其次,利用物元可拓法和理想解法求解理想模糊物元和负理想模糊物元,并根据欧式范数计算确定各评价对象的相对关联度。最后,通过在某地区节水灌溉项目投资决策的实例分析,验证了所提方法的可行性和有效性。贵州省科学技术基金项目(黔科合J字LKLS[2013]32号);;贵州省教育厅高校自然科学研究项目(黔教合KY字[2016]271号、103号、265号,黔教合KY字[2017]260号);贵州省教育厅高校人文社会科学研究项目(2016gh03);;贵州省高等学校教学质量与教学改革项目(GZSJG10977201608,GZSJG10977201603,GZSJG10977201508,GZSJG10977201505);;六盘水师范学院自然科学科研计划项目(LPSSY201502、201605);六盘水师范学院大学生项目(LPSSYDXS1602、17036、17037);六盘水..

Study of Optical Characteristics of InGaN/GaN MQW LED Depended on Growth Temperature

利用低压MOCVD系统,在蓝宝石衬底上外延生长了InGaN/GaN多量子阱蓝紫光LED结构材料。研究了生长温度对有源层InGaN/GaN多量子阱的合金组分、结晶品质及其发光特性的影响。结果表明当生长温度从730℃升到800℃时,LED的光致发光波长从490 nm移到380 nm,室温下PL谱发光峰的半高全宽从133 meV降到73 meV,表明了量子阱结晶性的提高。高温生长时,PL谱中还观察到了GaN的蓝带发光峰,说明量子阱对载流子的限制作用有所减弱。研究表明,通过改变生长温度可以对LED发光波长及有源层InGaN的晶体质量实现良好的控制。A series of blue-violet LEDs with InGaN/GaN multi-quantum-wells(MQWs) structure were grown by low-pressure metalorganic chemical vapor deposition(LP-MOCVD).The growth temperature of the active layer is very important for the indium concentration,crystal quality and optical properties of the sample.The emission wavelength over the range of 490~380 nm were achieved by varying the growth temperature between 730 ℃ and 800 ℃.And the full width at half of maximum of the photoluminescence and electricaluminescence spectrum were studied as a function(FWHM) of the growth temperature.Analysis of the relation between the emission spectrum and the growth temperature indicated that the high crystal quality and the expected emission wavelength can be achieved by controling the growth temperature of the active layer.国家自然科学基金项目(60276029);; 国家“863”计划项目(2004AA311020,2006AA032409);; 福建省科技项目(2006H0092,A0210006,2005HZ1018

Optimization for astaxanthin extraction from Haematococcus pluvialis with ethanol using response surface methodology

采用安全无毒的乙醇为溶剂,研究了超声时间、料液比、搅拌速度等因素对虾青素提取效率的影响。在此基础上,采用响应面设计对以上3个因素的交互关系进行探究。结果表明,3个因素对虾青素提取率的影响顺序为：超声时间〉料液比〉搅拌速度;最佳提取条件为：超声时间20min、料液比1：150、搅拌速度1000 r/min,在此条件下虾青素提取率可达48.42%。Ethanol, an environmentally friendly solvent, was used to extract astaxanthin from Haematococcus pluvialis. The effect of several conditions, including ultrasound time, the ratio of solid to liquid （S/L） and stirring rate, on astaxanthin extraction rate was investigated. Response surface methodology was applied to study the interaction in these factors. The effects of three factors on the extraction of astaxanthin were in order of ultrasound time, S/L, and stirring rate. The optimal astaxanthin extraction rate was 48.42% with 20 min of ultrasound time, 1：150 of S/L, and 1000 r/min of stirring rate.国家自然科学基金项目（41606177）; 福建省高校产学合作项目（2015N5006）; 福建省教育厅中青年教师教育科研项目（JA15406）; 泉州市科技局校地协同创新项目（2016N056

Preliminary studies on the scale insect pest of Pseudaulacaspis cockerelli in mangrove

首次发现陆生考氏白盾蚧严重为害潮间带红树植物秋茄。通过野外定位调查和室内饲养观察,研究其危害特征、种群分布、生殖力和自然死亡率。结果表明,考氏白盾蚧主要分布在秋茄叶片主脉两侧,叶背虫口数显著多于叶面(P<0.01),单叶虫口数多为1-50头,平均25.65头,最高418头;秋茄植株不同垂直空间层次的虫口密度无显著差异,但聚集度随垂直空间下降而增大;种群平均产卵量每雌52.22粒,自然死亡率69.35%,寄生蜂寄生是最主要的死亡因子,寄生率达34.23%;与几种陆生寄主植物相比,红树林考氏白盾蚧的种群密度、生殖力、叶最高虫口数均较高,该虫对潮间带生境及寄主秋茄具有适应性。The scale insect,Pseudaulacaspis cockerelli is an important pest for many kinds of plants for a long time in the land.In 2006,it was found firstly attacking the mangrove plant of Kandelia obovata in the tideland in Xiamen City,and had led to badly damages.Based on the field surveys and lab feeding,this paper dealed with its damage characteristic,population distribution,fecundity and natural mortality etc.The results showed that the scale insect mainly distributed on both sides of the midvien of K.obovata leaves,but the individual on the abaxial surface was significantly more than those on the adaxial surface(P<0.01).The individual number of one leaf mostly fluctuated from 1 to 50,and the average and tiptop numbers were 25.65 and 418,respectively.The pest population density had no remarkable discrepancies among different vertical spatial layer of K.obovata,however,its aggregating degree increased with falling of the layer.The population had an avarage fecundity of 52.22 each female and a high natural mortality of 69.53%.The main natural death factor were two species of parasites(Hymenoptera: Chalcididae),and their total parasitical ratio reached 34.23%.In the mass,the pest population density,fecundity and tiptop individual number of a leaf in the mongrove were all more than those in serval other host plants on land,which implied that this scale insect had a high adaptability to the habitat of tideland and the plant of K.obovata

香豆素-半花菁-苯硼酸对唾液酸的识别与光学传感

以共轭连接的香豆素和半花菁为信号报告基团,以苯硼酸为识别基团,设计合成了一种对唾液酸具有选择性识别的比色型荧光传感分子,命名为CHB,并采用吸收和荧光光谱方法研究其对唾液酸(N-乙酰神经氨酸)及其他糖类分子(如葡萄糖、蔗糖和麦芽三糖等)的响应.结果表明,CHB仅对N-乙酰神经氨酸表现出显著的吸收和荧光光谱响应,并通过高分辨质谱研究证实二者以1∶1计量比通过共价作用结合形成复合物.N-乙酰神经氨酸与苯硼酸的共价作用和静电作用共同影响了香豆素-半花菁共轭体系的分子内电荷转移,从而引起显著的溶液颜色变化和高选择性的光谱响应,因此CHB可用于N-乙酰神经氨酸的可视化检测.国家自然科学基金(21435003,91427304,21521004,J1310024

Development on AlInGaN/GaN PIN Ultraviolet Photodetectors

用AlInGaN四元合金代替AlGaN作为PIN探测器的有源层,研制出AlInGaNPIN紫外探测器。详细介绍了该器件的结构设计和制作工艺,并对器件进行了光电性能测试。测试结果表明,器件的正向开启电压约为1.5 V,反向击穿电压大于40 V;室温-5 V偏压下,暗电流为33 pA,350 nm处峰值响应度为0.163 A/W,量子效率为58%。Using AlInGaN instead of AlGaN as the source film of a photodetectors,an AlInGaN-based PIN UV photodetector was developed.Its device structure and fabrication processing are introduced in detail.Measurement results show that its turn-on voltage is about 1.5 V,and VBR>40 V;under-5 V bias voltage at room temperature,the dark current is about 33 pA;the peak responsivity can reach 0.163 A/ W at 350 nm,and the quantum efficiency is 58%.国家自然科学基金项目(60276029);; 国家“863”计划项目(2004AA311020,2006AA032409);; 福建省科技项目和基金项目(2006H0092,A0210006,2005HZ1018

Optimization Electrode of GaN-Based Light-Emitting Diode

针对以蓝宝石为衬底的GaN基发光二极管出现的电流扩展不均的问题,采用有限元方法建立了GaN基发光二极管的三维网络模型,并对四种常见结构的器件进行数值模拟,发现影响二极管电流的因素不仅与发光二极管电极的位置有关,而且依赖于器件的结构参数。以电流扩展不均为指标确定出这四种器件中最佳的电极位置分布,同时对最佳电极位置分布的器件进行了结构参数优化,结果表明当p型金属层方块电阻与n型GaN的方块电阻接近时,电流扩展均匀性最好,且p-GaN的接触电阻和厚度越小,电流扩展越不均匀。A 3D networks model of GaN-based LED on sapphire substrate was built by finite element analysis to simulate the non-uniformity current spreading.Analog modeling was done on the four normal device structures,it was found that the factors effected the current of LED were the position of electrode and the parameters of device structure.Considering the practical structures of GaN-based LED,four LED designs were modeled and the optimal electrode distribution was obtained,meanwhile the structure parameters were optimized.It reveals that the smaller contact resistances and the thickness of p-GaN are,the more non-uniformity of current distribution is.国家自然科学基金(60276029);; 国家863计划(2004AA311020和2006AA032409);; 福建省科技项目和基金(2006H0092,A0210006,2005HZ1018