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The main component of ramie glial was pectin, hemicellulose and lignin; The single factor on degumming of ramie test was respectively analyzed with a high vigorous of pectinase KDN and TZ-888 compound enzyme (mainly xylanase and mannanase on the pH value, bath ratio, dosage of enzyme, metal ions, temperature and time.The orthogonal test of L9(34 were done by bath ratio, dosage of enzyme, temperature and time. The results showed that the best compages of KDN pectinase on degumming was 1∶12 of bath ratio,pH 8.6,1 mmol/L Mg2+,300 IU/g of KDN pectinase,35℃、6 h;the best compages of TZ-888 compound enzyme on degumming was 1∶18 of bath ratio,pH 4.0,1 mmol/L Ca2+, 500 IU/g of TZ-888 compound enzyme,45 ℃,6 h.
摘 要:本研究根据苎麻胶质的主要成分为果胶、半纤维素和木质素,用高活性的KDN果胶酶和TZ-888复合酶(主要是木聚糖酶和甘露聚糖酶)从pH值、浴比、酶用量、金属离子、温度、脱胶时间等方面进行单因素试验,然后选取影响显著的浴比、酶用量、温度,时间进行四因素三水平的脱胶试验,结果表明鲜麻采用KDN果胶酶脱胶最佳组合为浴比1:18,pH 8.6, 1 mmoL/L Mg2+,酶用量300 IU/g,温度35 ℃、时间6 h时处理,TZ-888复合酶脱胶最佳组为浴比1:12,pH 4.0, 1 mmoL/L Ca2+,酶用量500 IU/g,温度45 ℃,时间6 h进行脱胶为优化的试验条件。
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The main component of ramie glial was pectin, hemicellulose and lignin; The single factor on degumming of ramie test was respectively analyzed with a high vigorous of pectinase KDN and TZ-888 compound enzyme (mainly xylanase and mannanase on the pH value, bath ratio, dosage of enzyme, metal ions, temperature and time.The orthogonal test of L9(34 were done by bath ratio, dosage of enzyme, temperature and time. The results showed that the best compages of KDN pectinase on dry ramie degumming was 1∶12 of bath ratio,pH 8.6,1 mmol/L Mg2+,20 IU/g of KDN pectinase,4℃、4h;the best compages of TZ-888 compound enzyme on degumming was 1∶18 of bath ratio,pH 4.0,1 mmol/L Ca2+, 300 IU/g of TZ-888 compound enzyme,40 ℃,5 h.
摘 要:本研究根据苎麻胶质的主要成分为果胶、半纤维素和木质素,用高活性的KDN果胶酶和TZ-888复合酶(主要是木聚糖酶和甘露聚糖酶)从pH值、浴比、酶用量、金属离子、温度、脱胶时间等方面进行单因素试验,然后选取影响显著的浴比、酶用量、温度,时间进行四因素三水平的脱胶试验,结果表明干苎麻采用KDN果胶酶脱胶最佳组合为浴比1:12,pH 8.6, 1 mmoL/L Mg2+,酶用量200 IU/g,温度45 ℃、时间4 h时处理,TZ-888复合酶脱胶最佳组为浴比1:18,pH 4.0, 1 mmoL/L Ca2+,酶用量300 IU/g,温度40 ℃,时间5h进行脱胶为优化的试验条件。
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Firstly, the 3D solid model of the analyzed object is built directly in the FEM software ANSYS 8.0 without using other CAD software. The influence of the side sizes of solid elements on computing results and the influence of coupling ways between different parts on the modal parameters are researched by simply modeling. And a new connecting method about joints in ANSYS is proposed and applied to finite element modeling of the test-bed for spindle system. Furthermore, several different computing techniques for modal parameters extraction are compared in solving the finite element model of spindle system test-bed. Many modal solutions are also done to achieve the relationships between the whole or part stiffness value and computed modal parameters. The laws about joint rigid parameters" influences on modal parameters are discussed by means of altering their values for conjoint parts. And by changing local rigid parameter values, the different location selections" influence on computed modal parameters is also studied.
本文通过使用ANSYS 8.0软件直接建立研究对象的实体结构模型,而没有借助其他的CAD软件;通过构建简单的模型研究实体单元边长大小对计算结果的影响,部件之间不同的联结方式对模态参数的影响,探讨在ANSYS中实现结合部的方法,提出一种新的联结方法,并建立主轴系统试验台的有限元模型;对建立的主轴系统试验台有限元模型求解,比较几种不同模态提取方法;通过改变结合部联结单元的刚度参数进行的计算,寻找联结刚度对模态参数变化的影响规律;改变局部联结单元的刚度参数,研究刚度值位置差异对计算模态参数的影响。
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Four scores are reported for the ACT Mathematics Test: a total test score based on all 60 questions, a sub score in Pre-Algebra/Elementary Algebra based on 24 questions, a sub score in Intermediate Algebra/Coordinate Geometry based on 18 questions, and a sub score in Plane Geometry/Trigonometry based on 18 questions.
ACT 数学测试共包括4项成绩:基于全部60个问题的总分数,基于24个问题检测初等代数/初等数学的技能分数,基于18个问题检测中等代数/坐标几何的技能分数,以及基于18个问题检测平面几何/三角函数的技能分数。
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Large numbers of test data which is systemic, credible, exact and detailed was acquired during the processing of these two scientific research item and settlement value and theoretical analysis on trial section was done together with the test and research on the site. The connection between the rule of settlement in the transition zone and the parameter such as groundsill, transmogrification modulus, material and density was studied based on comparing true settlement value in trial section with settlement value of theoretical calculation by frame analysis software. And it will help the farther research on design and construction about road-bridge transition zone.
同时在两个科研项目开展过程中,取得了大量系统、详实、可靠的试验数据,并结合现场试验研究工作,在室内开展了深入细致的过渡段沉降变形数值计算和理论分析研究,运用有限元分析软件,对过渡段的沉降变形进行了仿真数值模拟计算,与现场实测数据进行了对比分析,全面考察了过渡段地基土层与变形模量、路堤填料与压实密度等参数对过渡段沉降变形的影响规律,为进一步研究路桥过渡段的设计和施工可以提供借鉴。
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The paper through the mechanism which produces to the asphalt road surface water harm carries on the induction to summarize, as well as the different type bituminous mixture water stability has carried on a series of contrasts experiment to several kind of different aggregates and the asphalt adherency, has analyzed the aggregate and the asphalt adherency and the bituminous mixture water stability; Meanwhile moves the water action mechanism take the pavement structure in as the key point, in the basis room experiments to the design half rigid base bituminous mixture test sample carries on washes out the experiment, the observation test sample and washes out when the number of times increase along with the time variation the basic unit wash load situation, has analyzed the water to the bituminous pavement various structures level damage rule; To immerses under the condition using the ANASYS finite element software the bituminous pavement structure level the stress to carry on the analysis computation, and analyzed the bituminous pavement according to the computed result to produce the unboiled water harm the rule, further to understand the structure level produced the unboiled water harm the rule.
本论文通过对沥青路面水损害产生的机理进行归纳总结,对几种不同集料和沥青的粘附性以及采用不同抗剥落措施的沥青混合料的水稳性进行了一系列对比试验,分析了集料与沥青的粘附性及沥青混合料的水稳定性,并对水稳性试验进行了评价;同时以路面结构中的动水作用机理为重点,依据室内试验对设计的半刚性基层沥青混合料组合试件进行冲刷试验,观察试件随时间变化和冲刷次数增加时基层的冲刷量情况,分析了水对沥青路面结构层的损坏规律;利用ANSYS有限元软件对浸水前后沥青路面层底应力进行分析计算,并根据计算结果分析了沥青路面产生水损害的规律,进一步了解结构层产生水损害的规律。
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It introduces a kind of novel loading test system, based on the operation principle of damper. this loading system is operated by the driving motor. it realizes the loading, in that the damper has a negative drive force that puts on the motor. Based on the ordinary electromagnetic damper, the thesis presents a novel hybrid excitation electromagnetic damper which has adjustable work characteristic, analyses the working principle and structural feature of the electromagnetic damper, deduces the formulas to calculate the eddy current density through the Electromagnetic theory, analyses the distribution of the eddy current in the cotyloid rotor, and also studies the method of calculating the damp torque, establishes the mathematical model of the electromagnetic damper, analyses the relationship between the electromagnetic damper structural parameter and damp torque, researches the engineering design and analysis method of the electromagnetic damper, provides theory foundation for the design and analysis of the electromagnetic damper, contrives a hybrid excitation electromagnetic damper that satisfies the target request, designs a set of compound excitation electromagnetic damping loading control system whose control core is AT89C51 monolithic integrated circuit, analyses the electric circuit part, and carries on the experimental test to this set of electric circuits. Finally it debugs this electromagnetic damping loading system, this system satisfies the target request proposed.
论文提出了一个全新的加载测试系统种类,该加载系统是在阻尼器工作原理基础上,利用电动机拖动阻尼器运转,从而阻尼器产生一个与运动方向相反的阻尼力矩,该力矩作用在电动机上实现对电动机加载测试;同时,论文在一般电磁阻尼器基础上提出了一种新型的可调式复合励磁电磁阻尼器结构,该种阻尼器的工作特性在一定范围内可进行调节;论文分析了电磁阻尼器的工作原理和结构特点,运用电磁场理论分析推导了电磁阻尼器的涡电流密度公式,分析了涡电流在转子杯内的分布图,并对阻尼力矩计算方法进行了研究,建立了电磁阻尼器的数学模型,分析了电磁阻尼器结构参数和阻尼力矩之间的关系,对电磁阻尼器的设计和分析方法进行了研究,为电磁阻尼器的工程设计建立了理论基础;设计了满足技术指标要求的复合励磁电磁阻尼器和一套以AT89C51单片机为控制核心的复合励磁电磁阻尼加载控制系统,对该控制系统硬件电路各部分进行了分析和设计,对软件进行了设计,并对控制电路进行了试验调试,该系统满足所提出的加载指标要求。
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The main influence factors to shear strength test result was systenatically studied by the contrast test,including test machine,shear clamp,distance between shear blade edge,clearance fit between test sample and shear hole,shear rate,effect of machining on sample's outer surface.
通过对比试验,全面系统地研究了剪切强度的主要影响因素:试验设备、剪切夹具、刀口间隙、试样与剪切孔间隙、剪切速度以及试样的表面机加工对钛合金丝材剪切强度的定量影响。
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On the basis of the analysis of the influence of the object oriented language to software test, this article discusses the tactic and technology for object oriented software test, and proposes an idea and method to test the class as a basic test unit.
本文在分析面向对象程序设计语言对软件测试影响的基础上,讨论了面向对象软件测试的测试策略及测试技术,提出了将对类层的测试作为基本的单元测试的思想和方法。
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The study found that free-stage has no effect on performance, to be end as soon as possible; the pressure and oil-filling time in oil-filled stage are the key, which directly determines the speediness of the starting; slipping-stage decides the comfort of the starting, and the friction coefficient is important for this stage, synchronous engaging-stage don't product slipping loss, and don't impact the jerk of the vehicle, needing to be finished fast. According to control object and evaluate guidelines, the fuzzy control algorithm is developed and different experiments verify the correction of algorithm.5 With the debug of CVT control software, the experiment is finished in two years which includes test bench experiment, 60℃high temperature test in Tulufan of Sinkiang province, 4647 meters high altitude test at Kunlun mountains, as well as the minimum temperature of -32℃test at Heihe.
根据控制目标及评价指标,开发了湿式离合器接合过程模糊控制算法,各类试验证实了算法的有效性。5湿式离合器的起步试验伴随CVT控制软件的调试,历时二年,经过台架试验,新疆吐鲁番环境温度高达60℃的高温标定试验,昆仑山口海拔高度4647米的高原标定试验,以及黑河最低温度为-32℃严寒标定试验,所取得的研究成果对离合器软件开发和标定流程具有很好的借鉴意义和工程应用价值。6自动变速器起步离合器的标定是软件产品开发的核心技术。
- 推荐网络例句
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It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.
从鲍尔点的形成原理出发,分析对称连杆曲线上鲍尔点的产生条件,提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。
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The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.
集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品,年生产总值3000万美元,产品价廉物美、选料上乘、质量保证,深受国内外客户的青睐
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The eˉtiology of hemospermia is complicate,but almost of hemospermia are benign.
血精的原因很,以良性病变为主。