报道新型有机分子——三方向醚键型分枝状化合物的合成。
New organic molecules the three directional ether bond branched compounds were designed and synthesized.
氢键不属于化学键,也不属于范德华力,是介于化学键和范德华力之间的一种由氢原子参与成键的特殊键型。
The hydrogen bond does not belong to the chemical bond, neither belong to the van der Waals force. It is a special kind of bond situated between the chemical bond and the van der Waals force.
根据清除纯化原理,介绍了共价键型和离子键型两类清除树脂。给出了清除树脂在组合化学中的具体应用实例。
According to scavenging principle, scavenger resins are divided into one by covalent bonding and the other by ionic bonding.
最终建立以调整乡村医生报酬结构、保证基本报酬和调控激励报酬的干预措施,使乡村医生的行医行为由单纯医疗型逐步向医疗预防保键型转变。
A prevent measure could be established to gradual transform simple medical type of practicing medicine to preventive care type in the way of village doctors.
任何有关系型数据库背景的人都知道主键实际上不会改变,因为要把其更改传播到外键是很昂贵的工作。
Anyone with a relational data background knows that their primary keys really shouldn't change, as it's expensive to propagate that change to foreign keys.
另外,基础结构仍然是关系型的,这使XML数据能够利用关系数据库的实用功能,比如触发器、约束和外键关系。
Plus, the fact that the infrastructure is still relational allows the XML data to leverage the proven capabilities of the relational database like triggers, constraints, and foreign key relationships.
另外,在查询重写状态下,修改SELECT来摆脱一个范围型谓词,可以通过提高索引键列匹配增强性能。
Also in the query rewrite vein, modifying a SELECT to get rid of a range-type predicate can increase performance by improving index key column matching.
星型连接计划中,数据库服务器在维度表中构建散列表的同时从维度表中下推键来过滤事实表。
In a star join plan, the database server pushes down keys from a dimension table to filter the fact table at the same time as it builds the hash table on the dimension table.
然后我可以使用泛型来为传出键和值指定显式类。
I can then use generics to specify the explicit type for both the outgoing key and the value.
模式不需要明确指定一列是主键或唯一键来产生星型连接计划。
The schema does not need to specify explicitly that a column is a primary or unique key to produce a star join plan.
生成的hash值是数值型的,我使用这个值作为被索引的字符串的索引键。
The generated hash value is numeric, and I use this value as single index key for the string being indexed.
摩托罗拉计划留下它的集成数字增强型网络(iDen)技术,这提供了斯普林特奈斯泰尔公司(Sprint‘sNextel)产品使用的一键通功能。
Motorola plans to keep its iDen technology, which provides the push-to-talk function used by Sprint’s Nextel products.
该型乐器激发了表演者的信心——它可靠,拥有好的全范围的音准以及管子本身很轻和灵活的键系统。
The type of instrument that inspires confidence in a performer - it feels reliable, has good all round intonation as well as light and responsive key work.
JSON格式是一组键和值,可以是各种数据形式,比如字符串、整型或浮点型——往下看。
The format of JSON is a collection of keys and values, which can be different data types, such as strings, ints or floats – see below.
由于其在关系型数据库中的重要性,主键是所有键和约束里最基础的方面。
Due to their importance in relational databases, Primary keys are the most fundamental aspect of all keys and constraints.
络合及键合型高分子金属催化剂是高分子催化剂的重要研究方向之一,具有独特的催化效应及一定的应用前景。
The complex and bonded types of polymer-metal catalysts are the important researching direction on polymeric catalysts. And they have excellent catalytic efficiency and certainly applying prospect.
紧凑型入门级冷、热水高压清洗机,价格极具竞争性。非常友好的一键操纵,底盘集成油箱,高压管及附件存储槽。
Competitively priced hot water high pressure cleaner of the compact class. very user - friendly by one - button - operation, chassis with integrated tanks, hose and accessory stowage.
关系型数据库的逻辑模型进一步规范化这些实体和关系,并形成带有主外键约束的表。
The logical model for a relational database normalizes the entities and relationships into tables with foreign key constraints.
利用偶联反应合成溴甲酚绿键合硅胶,指出溴甲酚绿键合型改性硅胶作为新一代化学键合相,具有很大的发展潜力。
BCG. SG is prepared by coupled reaction. It is pointed out that this product has a great develop potentialities as a new type chemical bonded phase.
甲壳素和壳聚糖通过其羟基,氨基形成化学键吸附有机物或作为聚阳离子型电解质絮凝有机物。
Chitin and chitosan can adsorb organic compounds by forming chemical bond or flocculate organic compounds as a cationic polyelectrolyte.
美国阿姆斯特朗-纯银.014”笛头,.018”镍银镀银笛身和C型笛尾,镀银法国(开孔)按键,“革新”吹孔,直列G键。
Armstrong USA - Sterling silver . 014" head, . 018" silver-plated nickel silver body & C foot, silver-plated French (open hole)keys, "Progressive cut" embouchure hole, in-line G.
本文从技术和市场的角度概述了KBA公司的最新技术结晶,无水、无墨键、无齿轮的环保型报纸印刷机——CORTINA。
The author makes a summary of the latest technicology, the waterless, key less, gearless environmental news press, CORTINA of KBA Company according to aspects of technology and market.
本文用功率键合图和传递函数分析法,对CM 14型液压马达的动态特性进行了数字仿真和分析。
The digital imitation and research are carried on for the dynamic characteristic of hydraulic motor CM14 by using both power bond graph method and transfer function analysis method.
结果:肱二头肌键膜与正中神经的关系:非覆盖型80%(40侧),部分覆盖型12%(6侧)和全覆盖型4侧(8%)。
Results: The relationship between bicipital aponeurosis and median nerve: 80% non-covered type (40), 12% partially covered (6) and 8% completely covered type (4).
依据功率键合图原理,研究BZZ5型液压转向器和负荷传感全液压转向系统的建模方法。
Based on the principle of power bond graphs, the modeling method for the hydraulic steering control unit type BZZ5 with the load sensing hydraulic steering system is introduced.
本文报道了耐尔兰a键合型石墨修饰电极的制作方法,详细研究了修饰电极的电化学行为及对NADH的响应情况。
A new NBA modified graphite electrode has been reported. Its fabrication, electrochemical mechanism and the response to NADH have been discussed in detail.
可提供针对每个外键或针对布尔型字段创建的筛选器。
Filters that are created for each foreign key or Boolean fields.
由单轴反复拉伸试验分别研究了含键合型防老添加剂和防老剂h的HTPB推进剂破坏能与贮存老化时间的关系。
The relationships between damage energies of HTPB propellants and storage ageing time were investigated by uniaxial repeated tensile test.
分析了功率型LED热阻系统的构成,对采用银浆和环氧胶作为芯片键合材料的功率型LED热阻进行了对比研究。
The thermal resister of power LED is analyzed in this paper. Using the silver paste and epoxy resin as die bonding materials, two kinds of power LEDs are made.
生川乌炮制后生物碱大多数由双酯型水解转化为单酯型,水解反应最容易发生的位置在C8位,水解反应的类型是烷氧键发生断裂的酯的碱性水解。
After processing of crude aconite roots, most of the diester diterpenoid alkaloids converted to the monoester form, while C8 was the major location for such reaction. It is a ty…
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