Parameters design of powertrain system of electric vehicle with two-speed gearbox

The Brilliouin optical time domain analysis (BOTDA) is a newly developed technique adopted to measure and monitor the strain and temperature generated along optical fibers. The BOTDA has the characteristics of distributed measurement, long distance, high precision and durability, so it is suitable to structural health monitoring. Then a new optical fiber sensor embedded method based on air-blowing and vacuum grouting is introduced. It can lay the long distance distributed optical fiber into the concrete easily in short time. An experiment has been set up to study the validity of the new method, which shows that the embedded optical fiber can measure the concrete strain accurately, and it can realize the comprehensive, long-term, stable and real-time health monitoring to the civil structure.     

棉纤维品质长度的图像测量

提出了一种新的棉纤维品质长度的检测方法。该方法主要通过使用CCD、计算机、高亮度光源构成的精准测量系统而实现,它能够准确测量Hertel曲线上任意一点的纤维累积根数。基于随机分布理论,建立了纤维长度分布的数学模型,实现了对主体长度以上纤维各个长度进行分段测量。实验表明,本方法的测量结果与Y111结果高度相关,测量速度快。     

Cloning GhSCFP Gene and Its Function in Cotton Fiber Development

As a major raw material for the textile industry and the most important fiber crop in the world,cotton is of great significance in Chinese economy.The development of cotton fiber can be divided into initiation,elongation,secondary wall synthesis,and maturation stages.The initiation and elongation stages of fiber,which determine the number of fibers on each seed and the final length of fiber,directly affect the yield and quality of cotton fiber.     

从蛋清浓厚蛋白中提取溶菌酶技术的研究

通过中空纤维超滤法及亲和凝胶层析法对鸡蛋清中溶菌酶进行提取精制,结果表明蛋清溶菌酶的最佳超滤提取工艺为:连续稀释4倍、超滤温度35℃,料液pH值8.5,进样压力0.08 MPa,再经超滤浓缩处理,酶活得率为131.93%,溶菌酶透过率为73.57%,样品液的酶活约为4 700 U/mL。经过亲和凝胶层析的进一步纯化及真空冷冻干燥,最终蛋清溶菌酶冻干粉的酶活为18 500 U/mg,蛋清溶菌酶的酶活得率为180.83%。     

Development of an apparatus for testing heat-resistance time of combustible devices

Based on the characteristics of combustible cartridge case, a test method for heat-resistance time of minor-caliber rapid-fire gun with high rate of fire is proposed and test apparatus prototype is developed. The method is to do the flame detection through the use of photomultiplier tubes combined with optical fiber and detecting smoke by using the infrared and receiver combined with optical fiber. The test experiments show that the apparatus can effectively test the signal smoke and flames. Moreover, it can be applied to the heat-resistance test of other nonmetallic materials.     

New Development of Transmission Researches about Optical Solitons in Optical Fiber Telecommunication Systems

This paper prieseuts comprehensively new development of transmission researches about the optical solitons in optical fiber tele communication systems abroad,including:1.N soliton interaction in optical fiber;2.pulse propagation in the fiber;3.the femtosecond soliton soliton interaction in dispersion shifted fiber;4.strongly coupled nonlinear parametric solitary waves;5.higher order effects in bandwidth limited soliton propagation in optical fibers;6.suppression of noise accumulation in band width limited soliton transmission by means of nonlinear loop mirrors.     

Stepwise Decomposition Algorithm Research of the Intersecting Body Volume of Irregular Polyhedrons

We integrate the problems of deduction of intersecting grooves and bases in the constructional engineering into the problem calculating the intersecting body volume of irregular polyhedrons, and put forward the stepwise decomposition algorithm of the intersecting body volume of irregular polyhedrons based on computer graphics. The method takes advantage of the basic algorithms in the computer graphics and improves one of the algorithms which can be used to judge whether the dot is in the plane or not. By analyzing the method, we have developed the calculation formulae. Winth the segmentation function, the stepwise decomposition algorithm can be used to compute the intersecting body volume not only of the convex polyhedrons, but also the concave polyhedrons. By programming, the stepwise decomposition algorithm has been carried out, and its accuracy has been testified by a typical example.     

黄河流域棉区纤维品质区域分布特征与生态区划研究

【目的】旨在研究黄河流域试验环境与参试品种品质性状互作模式。【方法】选用2005―2014年国家棉花品种区域试验黄河流域棉区中熟常规组19个试验点,作为试验环境;运用GGE模型绘制双标图,结合纤维品质性状选择对适宜的生态区划分进行探讨,并基于GGE双标图对纺纱均匀性指数与其他指标的相关性进行研究。【结果】(1)纤维的纺纱均匀性指数与纤维的上半部平均长度、断裂比强度和长度整齐度指数呈极显著正相关,与断裂伸长率、反射率表现为正相关但不显著,与马克隆值显示为负相关但不显著。(2)黄河流域棉区纤维品质性状在19个生态试点的表现可划分为3个特征明显的纤维品质生态区。第Ⅰ生态区包括江苏泗阳、响水,安徽灵璧,河南新乡和商丘,其纤维上半部平均长度、断裂比强度和纺纱均匀性指数都显著高于其余生态区,长度整齐度指数显著高于第Ⅲ生态区,且纤维上半部平均长度、断裂比强度和马克隆值协调较好,都达到了国家棉花品种审定的Ⅱ型标准,为"优质纤维生态区"。第Ⅱ生态区包括陕西大荔,河南西华,山东宁津,河北石家庄和故城,其马克隆值较高,纤维上半部平均长度和断裂比强度表现一般,纺纱均匀性指数表现最差,为"普通纤维生态区"。第Ⅲ生态区包括陕西杨凌,山西运城,河南安阳,河北邯郸、沧州,天津宁河,山东惠民、金乡和临清,其马克隆值最低,其余性状表现中等,为"低马克隆值生态区"。【结论】本研究明确了黄河流域棉区棉花纤维品质生态区的划分,可为黄河流域广适性棉花品种的选育、生态区划分和理想试验环境选择等提供依据。     

棉纤维主要品质性状的气象生态模型研究

 通过分析1994—1995年在陕西杨陵和山东的鄄城、泰安、东营以及2001—2002年在长江流域棉花品种试验区域进行的试验资料,在不考虑土壤、栽培调控等因素的前提下,确定棉花铃期日均最低温、日均最高温和相对湿度、夜均温和日均降水量分别是影响棉纤维长度、比强度、麦克隆值的关键气象因子,并建立了基于铃期关键气象因子对棉纤维长度、比强度和麦克隆值的气象生态模型。上述模型既强调了遗传性对棉纤维品质性状的决定作用,也体现了气象生态因子的作用。棉纤维长度、比强度和麦克隆值气象生态模型RMSE分别为0.985 mm、1.003 cN·tex^-1和0.233,模拟值与观测值1：1直方图吻合度好,模型具有较好的预\{测性。     

INTRODUCTION TO A NEW AUTOPROGRAMMING SYSTEM FOR NC LATHE

This paper deals with the BCH autoprogramming system based on the principle of "representing shap with numbers", With this system, the organization of turning process can be accomplished by inputting only some codes and a few characteristic parameters, and the NC block instructions to control the NC lathe via control unit can be output in turn so that it is possible to write a part program at the shop floor which is benifitian for developing a new programming method to be used in a multistage computer manage system with communicating interface.     

Combining ability of upland cotton, <Emphasis Type="Italic">Gossypium hirsutum </Emphasis>L., with traits associated with sticky fiber

Sticky cotton causes severe processing problems at textile mills and can be caused by plant sugars deposited directly from the plant to the lint in the absence of insects. A partial diallel design was used to investigate the combining ability of six upland cotton, Gossypium hirsutum L., genotypes in Lubbock, Texas. Sucrose and glucose on fibers were measured as well as more mechanical fiber properties including stickiness ratings. Variance component analysis indicated significant differences among genotypes for all fiber traits and for sugar content. The greatest differentiation occurred in samples taken from more immature fruiting forms. Moreover, significant GCA and SCA differences were determined among parental lines for fiber traits including stickiness ratings. Findings suggest that breeding efforts could be directed toward lines with a low likelihood of producing sticky cotton.     

Fatigue life finite element analysis of output gear pair of wind turbine speed-increase gearbox

Cracking monitoring provides an important way to evaluate structural safety. Cracking monitoring method based on distributed optical fiber sensor can effectively avoid undetected phenomenon existed in point-wise test method, and it can run automatically. A theoretical model of cracking monitoring based on obliquely intersected fibers and Brillouin Optical Time Domain Analysis (BOTDA) is introduced, and the numerical equation among fiber strain, crack width and crack angle is established by the calibration experiment. The experiments are also carried out to study the performance of different kinds of cracking sensors with different gauge length and pretension. The quantitative relationship between optical fiber measured strain and crack (including width and angle) is established for the 300 millimeter crack sensor. The cracking simulation test proved that this new method can effectively record the width and the angle of cracks during the whole cracking process.     

新型米糠功能食品的研究

米糠是稻谷加工的副产品,具有极高的营养价值。利用挤压技术使米糠的营养成分稳定,在常温下可贮存1年。探讨了米糠食品加工技术的发展概况,并从米糠油脂、米糠蛋白、米糠的膳食纤维及米糠发酵等方面综述了新型米糠功能食品的研究进展。     

棉花纤维发育的分子研究进展

棉花纤维的发育经历起始期、伸长期(初生壁形成)、次生壁形成期和成熟期四个时期，大量研究表明在棉花纤维发育的各个阶段均有大量的基因参与调控棉花纤维起始细胞突起，棉花纤维细胞的伸长及次生壁的形成等过程。本文综述了棉花纤维发育过程中在分子水平上的一些研究进展。     

发酵法制备竹笋膳食纤维的工艺研究

以竹笋为主要原材料,研究利用保加利亚乳酸杆菌与嗜热链球菌混合培养的乳酸菌,以微生物发酵法而制备竹笋膳食纤维粉的最佳工艺参数。对发酵法制备膳食纤维的提取含量、持水性、溶胀性等理化检验指标及其色、香、味等感官指标与非发酵法成品进行了对比分析。通过正交实验分析,探讨了发酵时间、发酵温度、接种量和菌种配比对发酵工艺的影响。通过单因素实验,分析了干燥因素对产品品质的影响,正交试验结果表明,该法最佳发酵条件是:发酵时间为24h,培养温度为35℃,接种量为2.5%,菌种配比为1∶1。单因素实验结果表明,最佳干燥条件是:干燥温度为70℃,干燥时间为2.5h。该制品香味清淡,色泽自然,口感良好,营养保健,是一种新型的发酵保健蔬菜制品。与非发酵工艺同类产品相比,此法制备的膳食纤维的提取率和持水力均有一定程度的提高,而对溶胀性的改善效果并不大。     

太原市晋阳湖水质对蚕豆根尖细胞微核的影响

利用蚕豆根尖微核技术综合评价晋阳湖的水质污染情况。采集太原市晋阳湖5个样点的水,直接处理蚕豆根尖,检测各组水样对根尖细胞形成微核的诱导效应,并评价对应水体的污染程度。用晋阳湖5个水样点的湖水处理蚕豆根尖细胞的微核率为0.267%~1.767%,其中,渔场、电厂出水口、游泳处水样的污染较为严重,形成的微核率均高于0.7%,显著高于对照组水样(p0.05)。晋阳湖水质具有一定的遗传毒性效应,晋阳湖水已受到不同程度的污染。     

The Optical Signal Processing of Distributed Fiber Optical Force Sensors

For the distributed fiber optical sen sor based on the principle of mede-coupling of polarization-maintaining fiber and the theory of partial coherence of quasi-monochromatic light,it is of great importance to process the weak optical signal from the sensing fiber.The characteristics of the optical slgnal was analyzed and suggestions were given for medified Mach-Zehnder interfer-ometer,which in cludes an acoustooptical medulator and a polarized-beam splitter to realize the het-erodyne in terferen ce. The method not only eliminates the influences of light source fluctuation and background light,but decreases the loss of the signal ptocessing,and improves S/N ratio.The experi-ment results coincide well with the analysis.     

N-新戊酰,O-异丙醇酯衍生法分析小麦氨基酸含量与碳氮稳定同位素

以2-氨基己二酸为内标,采用异丙醇和新戊酰氯将氨基酸衍生化成N-新戊酰基,O-异丙醇酯(NPP),利用气相色谱-质谱仪分析了小麦籽粒蛋白质氨基酸含量,同时利用气相色谱-燃烧-同位素比值质谱仪分析了氨基酸的碳氮稳定同位素组成。结果表明,N-新戊酰基,O-异丙醇酯(NPP)衍生化法可以得到丙氨酸、甘氨酸、缬氨酸、亮氨酸、异亮氨酸、脯氨酸、苯丙氨酸、赖氨酸和酪氨酸的较高的回收率(83.3%～104.9%)和较好的线性关系(相关系数为0.994～1.000);此方法还可以得到丙氨酸、甘氨酸、缬氨酸、亮氨酸、异亮氨酸、脯氨酸、天冬氨酸/天冬酰胺、苏氨酸、丝氨酸、蛋氨酸、谷氨酸/谷氨酰胺、苯丙氨酸、赖氨酸和酪氨酸的可靠的碳氮同位素比值。此方法可以为今后作物品质、营养和氨基酸代谢的深入研究提供更加有利的手段。     

应用计算机辅助识别进行棉花有色纤维的遗传分析

本研究应用计算机辅助色彩识别技术，对以白色棉冀851和棕色棉ZYS20作为亲本的杂交后代F2群体的棉花纤维颜色进行了分析，研究结果表明应用计算机辅助色彩识别技术获取棉花纤维红绿蓝(RGB)数据，适合对棉花有色纤维的颜色鉴定，获取的数据客观可靠可重复，值得在彩色棉育种中应用。对本研究的F2群体的分析表明，棉花纤维颜色的：RGB值的百分数在该群体中分离状况符合正态分布，符合多基因控制的数量性状遗传特征。     

陆地棉有色纤维基因遗传及其对产量和品质的影响

用５个不同来源的有色纤维陆地棉材料（３个棕色棉、２个绿色棉）与２个白色棉配制１０个杂交组合,分析其后代的纤维颜色遗传情况。试验表明,陆地棉有色纤维性状受不完全显性单基因控制。同时采用经测验具有良好等基因性的两对近等基因系,研究有色纤维基因对产量、品质等共１５个性状的影响。结果表明,有色纤维基因对皮棉产量、衣分、纤维长度、比强度、麦克隆值、抗病性有负效应,对子指有正效应,影响程度与遗传背景有关,对子棉产量、铃重、单株成铃、株高、果枝数等性状无明显不良反映。但结合有效选择,通过杂交、回交等方法对原有色棉亲本的产量、品质性状可有一定程度的改良