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The effects of the content of Hexogen and Nitroguanidine on the combustion behavior of nitramine propel-lants under low pressure were studied in the closed bomb. The combustion data of six kind of nitramine propellants with different ratio of RDX/NGu were obtained from 20MPa to 60MPa by the closed bomb test.
为了研究RDX和硝基胍对硝胺发射药在低压下燃烧性能的影响,对六种RDX/NGu配比不同的硝胺发射药进行低压密闭爆发器静态燃烧实验,获得了在20~60MPa压力范围内硝胺发射药的燃烧试验数据。
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The effective heat-transfer temperature difference of every effect of multi-effect evaporation subsystem and the preheat temperature rise Δt_(p,j of every level of multi-level preheat subsystem of the design model were distributed by equal heating area, equal heat-transfer temperature difference, and free proration methods.
设计型模型对多效蒸发子系统各效有效传热温差Δt_i的分配和多级预热子系统各级预热温升Δt_的分配分别采用等面积法、等温差法、自由配比法等进行分配并采用矩阵法结合迭代法进行设计模拟计算,其中自由配比法巧妙地将具有复杂约束条件的决策变量Δt_i和Δt_转化为取值0~1的中间决策变量τ_i、τ_,为Δt_i和Δt_的自由搜索进而为优化设计提供了一个简便的方法;在常规设计模拟计算的基础上,建立了复杂多效蒸发系统优化设计模型,该模型以系统年总费用最小为优化目标,以生蒸汽温度T_0、冷凝器中二次蒸汽温度T_K、蒸发温差配比系数τ_i和预热温升配比系数τ_为决策变量,采用遗传算法结合矩阵法求解。
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The design cross sectional area of shunt is calculated by the product of carrying rated current ratio and Bi-2223/AgAu matrix and shunt resistivity ratio. When quenching happens, shunt carries more current to void burn out or overheat of superconductor. Shunt which provides an enough heat sink can restrain the temperature rising of HTS section too fast.
分流器横截面积确定基于分流器与Bi-2223基体AgAu的电阻率对失超后电流分配比,这样保证超导体转人电阻态后分流器分流大部分电流,同时由于分流器具有很好热沉作用,抑制超导体温度迅速上升,从而避免超导材料烧毁或过热。
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The effects of the content of Hexogenand Nitroguanidine on the combustion behavior of nitramine propellant s under low pressure were studied in the closed bomb.
为了研究RDX和硝基胍对硝胺发射药在低压下燃烧性能的影响,对六种RDX/NGu配比不同的硝胺发射药进行低压密闭爆发器静态燃烧实验,获得了在20~60MPa压力范围内硝胺发射药的燃烧试验数据。
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Volumetric proportioner Model TPLR is an impedant equipment used to Prortion and blend wheat or to feed quantity of wheat.
TPLR系列容积式配麦器主要用于原粮的配比混合或用于原料定量供给,是面粉厂必备设备。
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Aiming at this problem, firstly, calculation formulae of utilization adhesion coefficient after installment of retarder were detailedly deduced. Then braking force distribution ratio , braking intensity and vehicle full-load parameters were taken as variables and inequalities which are about of retarder braking force , braking force distribution ratio , braking intensity and vehicle full-load parameters were established based on the ECE Law. The range of corresponding to any , as well as the most optimal matching between them, were obtained by solving these inequalities.
为此,论文在推导了安装缓速器后前、后轴利用附着系数、的计算公式基础上,基于ECE法规要求,以制动力分配比、制动强度及车辆满载参数为变量,建立了缓速器制动力关于车辆制动力分配比、制动强度和满载参数之间的多元不等式组,通过求解多元不等式组获得缓速器制动力与制动力分配比之间的取值关系,并从中得到二者之间的最优匹配。
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Theoretical analysis proved that inequalities perfectly described the optimal matching problem between and for a given full-load vehicle.
分析说明:对于给定满载负荷的汽车,不等式组完善地解决了缓速器制动力与制动力分配比之间的优化匹配问题。
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Therefore a GD sand-screening pipe is developed, which is helpful to the environment protection. This new sand-screening pipe consists of center pipe, sand filter and guide shoe. The center pipe is machined from 64mm tubing, and the sand filter is made from silica sand, cement, additive.
这种环保型滤砂管由中心管、滤砂器及引鞋组成,中心管采用 6 4mm油管加工而成,两端为特种 6 4mm平式油管螺纹,管体上每米均匀分布 72个直径 10mm孔眼;滤砂器是根据不同技术标准筛选不同粒度的石英砂、油井水泥、添加剂和水按配比加工压制的。
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air-gas proportioner:空气煤气配比调节器
air-gap type holder 空隙式支持器 | air-gas proportioner 空气煤气配比调节器 | air-inlet hanged trough cell 充气挂槽浮选机
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rag chopper:切布机
rag boiler 破布蒸煮器 | rag chopper 切布机 | rag content 破布浆配比