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It is possible to produce low-titanium aluminum alloy directly. Three months of periods of industrial test for production low-titanium aluminum alloy was conducted using the 80kA prebake electrolysis cells. The test results showed that the electrolysis cell can work stably, and the effect of TiO2 added into electrolyte on electrolytic process parameters, current efficiency, consumes of materials and energyare trifling. The titanium content in alloys is stable and the absorbility of Ti is high. The microstructure of electrolytic low-titanium aluminum alloy is homogeneous. The grain refinement effect is excellent comparing with that of alloys added titanium by melting Al-Ti master alloys and both alloys have the same grain refinement trend.

在80KA中型预焙电解槽上进行了为期三个月的低钛铝合金的工业试验，结果表明，电解槽工作状态稳定，TiO_2的加入对电解槽的主要工艺参数、电流效率、物料和能源消耗影响不大，合金的钛含量稳定，钛的吸收率高；所生产的电解低钛铝基合金的微观组织均匀，晶粒细化效果好，与熔配加钛的细化规律相同。

The structure of the circuit is mainly used in power systems of portable electronics. A super β lateral PNP is used as the output pass transistor,so that the design of this structure has low dropout, low quiescent current, low-linear regulation and load regulation characteristics, and has the functions of ON／OFF、the thermal 、overvolt and overcurrent profection.

该电路主要应用于便携式电子产品的电源系统中，调整管采用超β横向PNP管，使其具有低压差、低静态电流、低线性调整率和低负载调整率的特点，同时含有使能开关、过温、过压和过流保护等功能。

In order to meet the market development, our factory introduced a 55% focus on content protopine, protopine content 60%, 65% content protopine, and 70% content protopine, 75% and 80% and other low-grade protopine, low-grade films alkali, low-level protopine, and 90% content of 92% and other non-GB Product in order to adapt to different manufacturers and the general needs of distributors, products are exported to Shandong, Jiangsu, Zhejiang, Anhui, Guangzhou and other places, by our customers trust and.

为适应市场发展我厂重点推出了55%含量片碱，60%含量片碱，65%含量片碱，和70%含量片碱，75%和80%等各种低度片碱，低度片碱，低含量片碱，以及90%含量92%等非国标产品，以适应不同厂家和广大经销商的需求，产品远销山东，江苏，浙江，安徽，广州等地，深受客户的信赖和欢迎。

The psychrophilic enzymes is a kind that has high catalyst activety under the condition of low temperature and it is also a very important situation for the low-temperature catalyst to adapt to the low-temperature condition.

嗜冷酶是一类在低温条件下具有高催化活性的酶，也是低温微生物适应低温环境生存的重要条件。

They take the following three forms: a some strive forward to complete their democratization; b some witness failure in democratic elections and recollapse into undemocratic systems; c some get trapped in a low level of balance between low-functioning ruling elites and low-demanding populace.

不完全的民主有三种发展前景：（1）继续向前，完成民主化；（2）民主选举制度失败，转向一种不民主的制度；（3）在统治精英低效但公众对民主政治要求也低的情况下，更会堕入一种低水平平衡的陷阱。

It is well known that the large lattice mismatch (16%) and thermal expansion coefficient mismatch between GaN and sapphire substrate are the main origins of TDs. By new growing technique of LEO, we acquired high quality GaN films almost free of TDs. The stress characteristics in GaN films with MLTB growing technique is dependent on growing systems and conditions, and the changes of stress and dislocation density are rightabout; Combining buffer layers of high temperature and low temperature is first developed to growing GaN films with low dislocation density, and the mechanism of lowering TDs density is that the first buffer layer of high temperature can make nuclear in second buffer layer of low temperature bigger. This technique also can restrain yellow luminescence effectively.

众所周知，晶格失配和热应力失配是GaN异质外延中位错产生的主要原因；为此，我们对几种降低缺陷的MOCVD外延生长方法进行了新的尝试，其中尝试了侧向外延生长技术，得到了低位错密度（小于10〓/cm〓）、高质量的GaN外延层；尝试多低温缓冲层法，发现材料中的应力特性与生长系统和生长条件有关，材料中的应力与位错密度按相反方向变化；首次尝试高低温联合缓冲层法，材料中高温缓冲层可以使随后的低温缓冲层中成核颗粒增大，从而导致随后高温GaN外延膜中位错密度降低，并且能够有效地抑制黄光峰。

The low-temperature resistivity of filling skutterudite increases with the increase of temperature. However the slope of the resistivitytemperature curves are different. The curve of the sample with low filling fraction is smooth, and that of the samples with high filling fraction is sharp. It is caused by the existence of the impurities in the samples with low filling fraction.

填充型方钴矿材料的低温电阻率随镧填充率的变化规律与室温相同，但不同填充率的方钴矿材料的电阻率随温度变化的曲线的斜率不同，低填充率样品随温度变化趋势明显地比高填充率样品平缓，这种现象主要是由存在于低填充率样品中的杂质相引起的。

Results In 11 cases,5 cases were intracranial,and 6 cases intravertebral canal.MRI could effectively show similarly shuttle or long-round shape's abnormal signal imaging.The T1W imaging showed uniformity or asymmetric and low or equal signal.The borders were slighty low or equal signal intensity,some had spetum.The T2W imaging showed obviously high signal,and a few cases showed slightly high or equal signal,while the borders showed slightly low or equal signal imaging.The thin peripheral could be obviously enhanced,but without inner enhancement.

结果 11例中发生于颅内5例，椎管内6例，其 MRI 表现：断面上显示为在颅板下或椎管内的梭形或长圆形异常信号影， T1WI 上表现为均匀或不均匀的低、略低或等信号影，周边为略低或等信号的较厚边缘，少部分（2例）有分隔； T2WI 上多表现为较明显的高信号，少数呈等、略高信号，并可见略低或等信号的边缘；增强扫描病灶边缘明显强化，其内无明显强化或不强化，1例病灶呈较均匀的强化，1例病灶部分呈片状强化。

Through a series of quenching, tempering, tensile testing, low-temperature impact test and metallographic analysis, we ultimately came to the following conclusions:(1) low-carbon alloyed steel 20CrMn2NiMoV quenching at 870℃ and tempering at 200℃, whose structure contains tempered dislocation lath martensite and few small bainite under mixed, has the best obdurability;(2) Carbon Steel 45CrMn2NiMoV quenching at 850℃ and tempering at 620℃, whose structure is sorbitic, has a performance less than that of low-carbon Alloyed steel, but it can also meet the basic design requirements.(3) Mn can substitute for the role of Ni within limited extent.

通过一系列淬火、回火、拉伸试验、低温冲击试验以及金相分析，最终得出以下主要结论：（1）低碳合金钢20CrMn2NiMoV经870℃淬火+200℃回火，得到回火位错型板条马氏体+少量细小下贝氏体的混合组织，具有最佳的强韧性配合；（2）中碳合金钢45CrMn2NiMoV经850℃淬火+620℃回火，得到回火索氏体组织，综合性能虽然不及低碳合金钢，但也能基本满足设计要求；（3）Mn在一定程度上能够替代Ni的作用，适量的Mn和Ni相互配合可以得到最佳的低温韧性，因此&以Mn代Ni&是低温钢材料研究开发中一条可行的适合我国资源状况的合金化思路。

The laboratory test on two-stage low-intensity magnetic separation and "medium- and low-intensity magnetic separation" technologies for the titanomagnetite was performed through selecting two-stage grinding-beneficiation technology based on -1.7mm coarse tailings abandoning. The results indicate that the technico-economic indexes of the two-stage beneficiation process based on "medium- and low-intensity magnetic separation" are better.

选择-1.7mm粗粒抛尾的两段磨选工艺对钛磁铁矿进行了二段弱磁和&中磁—弱磁&选别工艺的实验室试验，结果表明，&中磁—弱磁&二段选别工艺具有较好的技术经济指标。

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。