等径的

Numerical simulations were carried out to study the effect of reversible work and viscous dissipation on the heat transfer characteristics of compressible fluid flow in microtubes.

利用数值方法讨论了压力功和粘性耗散对微细光滑管内可压缩流动换热特性的影响，得出以下结论：微细管内 Ec沿管长是变化的，仅依据入口处的 Ec对压力功及粘性耗散的作用进行取舍是不确切的；等热流及等壁温换热条件下的计算结果显示，在入口 Ma及长径比较大时，考虑压力功及粘性耗散时得出的 N u要小于常规尺度管的理论值，在等壁温情况下，甚至出现了热流方向发生变化的情况

36 cases severe cardiac valve replacement whose cardio/thorax were 0.68～0.90 measured by sternite, heart function were Ⅲ～Ⅳ grade, average of left ventricle diastole diameterwas 67±9.2mm. All the patients heart function were improved by strict therapy before operate. Selecting best opportunity for operation, by general anesthesia, moderate hypothermia extracorporeal circulation, perfusing heart by cold stop-beating fluid including hypokalium and blood ,and refusing dopamine to maintain haemodynamics after cardiac resuscitation.

36例重症心脏瓣膜置换术病人，X线胸片心胸比0.68～0.90，心功能Ⅲ～Ⅳ级，左室舒张末径平均67±9.2mm，术前均经过严格改善心功能治疗，选择有利的手术时机，采用以芬太尼为主，咪唑安定、异丙酚、异氟醚等为辅助药的全身麻醉，中度低温体外循环，以高钾含血冷停跳液灌注心脏，心脏复苏后静脉输注多巴胺等维持血流动力学稳定。

Since there exists some disadvantages such as poor mechanic properties and much higher burning rate pressure exponents (?1) in the fundamental formulations, this work is devoted to the improvements of combustion characteristics and mechanic properties of LOVA propellants. The effects of the crystal shape, size and contents of nitroamine particles, the types of binder, plasticizer and surface-active agents and the contents of NC on combustion performance are studied by closed bomb tests. In the mechanic properties tests, the effects of the types of binders, plasticizers and solid fillers, the interaction between binders and solid fillers and technological procedures on propellant mechanic properties are researched.

针对基础配方具有燃速压力指数远大于1、力学性能差等特点，采用密闭爆发器等试验手段，研究了诸如硝胺粒径、硝胺晶体形状、硝胺含量、粘结剂、增塑剂、硝化棉含量及表面活性剂等因素对燃烧性能的影响；采用抗沖、抗压静态试验方法，对粘结剂、增塑剂、固体填料、粘结剂与固体填料之间的相互作用及工艺条件与力学性能之间的关系进行了研究，提出了改善低易损性发射药燃烧性能和力学性能的技术途径。

The preparation of avermyctin emulsions in water was achieved by mixing the surfactants polyoxyethylene (10) octylphenyl ether (OP10), polyoxyethylene styrenated phenol ether (602), and polyoxyethylene (40) castor oil ether (EL-40) with polyoxyethylene (20) castor oil ether (EL-20), separatively. Emulsion stability was investigated by analyzing the hydrophile-lipophile balance, critical micelle concentration, and surface tension. Then, the surfactants of polyoxyethylene polyoxypropylene styrenated phenol ether (1601), block copolymer (L64), and octyl phenyl polyoxyethylene phosphonate were added to the emulsion made by blending EL-40 and EL-20, separatively. The stability of the emulsions was investigated further and discussed in terms of droplet size, surface tension, and zeta potential.

首先将辛基酚聚氧乙烯醚(OP10)、苯乙烯基酚聚氧乙烯醚(602)和蓖麻油聚氧乙烯(40)醚(EL-40)分别与蓖麻油聚氧乙烯(20)醚(EL-20)复配制备阿维菌素水乳剂，从亲水亲油平衡值、临界胶束浓度、表面张力等方面分析了二元表面活性剂复配对乳液稳定性的影响；其次，在EL-40与EL-20复配基础上，将苯乙烯基酚聚氧乙烯聚氧丙烯醚(1601)，嵌段共聚物(L64)和辛基酚聚氧乙烯醚磷酸酯分别添加到乳液中，从粒径、表面张力和zeta电势等方面考察三元表面活性剂复配对乳液稳定性的影响。

Moreover, the theory overall looked that, still wasat the rough stage, first was its basic parameter determination alsomust depend upon many experiences algorithms and the empirical data, roller distance, roller diameter, Next is many technical phenomenalike spiral curved waste product, the noise, theslanting roller characteristic, the slanting roller rollershape characteristic, the distortion match characteristic andso on all lacks the theory elaboration; Is once more the theoryconcise quality is insufficient, set of formulas not only cannotinclude each kind of cross section molding, even cannot include thesimilar cross section but the size and the material quality differentwork piece, like the curved distance and so on all lacks the generalexpression with the curvature.

另外，就矫直理论的总体来看，仍然处于粗糙阶段，首先就是其基本参数的确定还要依靠许多经验算法和经验数据，如辊数、辊距、辊径、压弯量及矫直速度等；其次是许多技术现象如螺旋弯废品、矫直缩尺、矫直噪声、斜辊矫直特性、斜辊辊形特性、拉弯变形匹配特性等都缺乏理论阐述；再次是理论的概括性不够，一套公式不仅不能包括各种断面型材，甚至不能包括同类断面而尺寸和材质不同的工件，如弯距和矫直曲率等都缺少通用表达式。

Moreover, the theory overall looked that, still wasat the rough stage, first was its basic parameter determination alsomust depend upon many experiences algorithms and the empirical data, roller distance, roller diameter, Next is many technical phenomenalike spiral curved waste product, the noise, theslanting roller characteristic, the slanting roller rollershape characteristic, the distortion match characteristic andso on all lacks the theory elaboration; Is once more the theoryconcise quality is insufficient, set of formulas not only cannotinclude each kind of cross section molding, even cannot include thesimilar cross section but the size and the material quality differentwork piece, like the curved distance and so on all lacks the generalexpression_r with the curvature.

另外，就矫直理论的总体来看，仍然处于粗糙阶段，首先就是其基本参数的确定还要依靠许多经验算法和经验数据，如辊数、辊距、辊径、压弯量及矫直速度等；其次是许多技术现象如螺旋弯废品、矫直缩尺、矫直噪声、斜辊矫直特性、斜辊辊形特性、拉弯变形匹配特性等都缺乏理论阐述；再次是理论的概括性不够，一套公式不仅不能包括各种断面型材，甚至不能包括同类断面而尺寸和材质不同的工件，如弯距和矫直曲率等都缺少通用表达式。

At last,the optimized formula composition and technique of preparation were obtained by orthogonal design,and long-circulating praziquantel liposome was prepared.

在建立吡喹酮含量测定方法的基础上，通过葡聚糖凝胶柱色谱法、显微镜法、激光散射法等定性及定量方法考察脂质体的包封率、微粒外观、粒径及其分布等指标。

This research applies the micro forming process with other mass production techniques to construct the key components of the micro/meso gear transmission. The final prototype is the planetary gear transmission with outer diameter 6mm and gear module less than 0.15mm developing in 3 years. The purposes and developing technologies of this project are as follows: 1. setting up the design and analysis of parts and system; 2. the mold design of gear and planet plate; 3. assembly modules of planetary gear train; 4. inspection of gear profile and gear train; and 5. heat treatment of micro parts.

本研究将以精微成形技术搭配其他量产制程，逐步开发微型减速机内的所有关键零件，预计在3年内最终完成外径≦ψ6mm、齿轮模数m≦0.12mm之的行星式齿轮减速机的开发，研发目标包含有微型传动系统结构/机构与零组件设计分析技术，试量产型精微行星/太阳齿轮、传动盘、环齿轮等原型件模具设计与开发，行星臂、太阳齿轮、行星齿轮与环齿轮等组装模组技术，微型齿轮齿形及相关微型齿轮箱检测技术，以及精微元件热处理技术等关键技术。

The company was established in 2002, with the most advanced production equipment, products with low noise and low power consumption and long life of the characteristics of Division I sell a variety of standard models bearing model specifications diameter 1-15 mm, diameter 30 mm Following the metric system, English, flange series bearings, stainless steel bearings, ball bearings thrust plane, and other micro-bearings; agent and also imports NMB, NSK, KOYO, TPI, NTN,,,, and so on brand-name imported bearings, low-priced sales Imports original 830 zz, 520zz, 695zz cooling fan bearings; widely used in various types of micro-motors, fitness equipment, computer cooling fan, instruments, computers, motor vehicle, precision instruments, machinery, household appliances, medical equipment, fishing gear, High-end toys, and other fields.

本公司成立于2002年，拥有全国最先进生产设备；产品具有低噪音、低功耗、长寿命之特点；我司销售各种各样的规格型号轴承，规格型号内径1－15mm、外径30mm以下的公制、英制、法兰系列轴承，不锈钢轴承，平面推力球轴承等各类微型轴承；并且还代理进口NMB、NSK、KOYO、TPI、NTN、、、、等等名牌进口轴承，低价销售进口原装830zz、520zz、695zz散热风扇轴承；广泛用于各类微型电机、健身器材、电脑散热风扇、仪器仪表、计算机、汽车电机，精密仪器，机械设备，家用电器，医疗器械，渔具，高档玩具等领域。

Produced by compression springs, Extension Spring, torsion spring,¨, battery spring, spring roll cochlea, square flat steel spring, steel spring, electrical switch springs, special-shaped springs, clockwork springs, valve spring, a snake-type spring, craft spring a variety of precision springs range from 0.15 ~ 8mm diameter, widely used in electronics, computer, hardware, electrical, electronics, machinery, tools, toys, locks, and automobile industries, by the vast numbers of clients of all ages.

生产的压缩弹簧、拉簧、扭簧、卡簧、电池簧、蜗卷弹簧、方扁钢弹簧、钢片弹簧、电器开关弹簧、异型弹簧、发条弹簧、气门弹簧、蛇型弹簧、工艺弹簧等各种精密弹簧线径0.15~8mm不等，广泛适用于电子、电脑、五金、电机、电器、机械、工具、玩具、锁具、汽车等行业，深受广大客户的青睐。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。