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Based on the A / D converter the basic principles and characteristics of the broadband A / D converter technology and A / D converter, the choice of a number of exploration and study.

本文基于A/D转换的基本原理和特性，对宽带A/D转换技术和A/D转换器的选择进行一些探讨和研究。

In the previous exercise, the count terminal has a 32-bit integer representation, while the Number of Iterations control is by default a double-precision floating-point number until you change it.

在先前的练习中，总数端子是32位的整型数字，而Number of Iterations控件在你改变它之前将会是一个默认的双精密度的浮点数字。

The venom of elapid snakes contains a number of small proteins that display a broad spectrum of pharmacological activities.In study on the neurotoxin from the venom gland of Bungarus multicinctus,five cDNA sequences (MNCTL1-a,MNCTL1-b,MNCTL1-c,MNCTL1-d and MNCTL2) encoding two novel proteins were obtained from the total RNA by reverse transcription-polymerase chain reaction.

采用SMART技术和RT-PCR方法，从同一个银环蛇毒腺中克隆到了5 种尚未报道过的心脏毒素类似物全长cDNA序列（MNCTL1-a、MNCTL1-b、MNCTL1-c、MNCTL1-d和MNCTL2）。5种序列中，MNCTL1-b、MNCTL1-c、MNCTL1-d和MNCTL2的长度均为505 bp，包括5′非翻译区32 bp，3′非翻译区212 bp和其余261 bp组成的一个完整开放阅读框；MNCTL1-a 由于3′非翻译区24 bp的缺失，全长cDNA仅为481 bp。

Cherry also contains a lot of vitamin A, B and a number of phenolic antioxidants.

樱桃中还含有大量的维生素A、B以及多酚类抗氧化物质。

While early studies focused on the potential roles in health and disease of provitamin A carotenoids, such as b-carotene, research over the past decade has provided a framework for our understanding of the functions of non-provitamin A carotenoids such as lycopene, especially in regards to its association with a reduced risk of a number of chronic diseases, including cancer.

人们早期的研究多关注于如β胡萝卜素等维生素A前体类胡萝卜素对于健康和疾病的潜在作用，而近几十年的研究为对于如番茄红素等非维生素A前体类胡萝卜素的功能认知提供了参考，特别是关于它与降低包括癌症在内等慢性病的患病风险的联系。

During these years (1997-2000) in the research area of annonaceous acetogenins 5 natural products and a number of chiral-pure analogs of annonaceous acetogenins have been synthesized using sugars as the starting materials. Their high activity and selectivity against cell line of colon tumor and a relationship between activity and configuration have been found too. In the respect of inhibitor of sialidase two new methodologies for the synthesis of chiral-pure 3-deoxy-ulosonic acid using hetero-Diels-Alder reaction or asymmetric propargylation as the key reaction were developed. On the topic of anti-leukemia marine natural product clavulactone a synthetic method based on the free radical cyclization and starting from sugar has been developed. In other title of PKC inhibited agent sphingosine a new synthetic route with SN2' as the key reaction has also been disclosed.

项目期间（1997-2000）在番荔枝内酯方面从糖出发合成了五个天然产物和一批手性纯的类似物，它们对肠癌细胞有很高的活性和选择性，并与构型有关；在唾液酸酶抑制剂方面发展了二类全新手性纯高碳糖的合成方法－杂原子D－A反应或丙炔基不对称加成为关键的反应；抗白血病海洋天然产物群柱虫内酯方面研究了由糖出发和自由基环化反应的合成方法；对PKC 起抑制作用的鞘氨醇方面也开创了新的合成途径－由糖出发并以SN2'反应为关键反应。

Each share of Series A Convertible Preferred Stock will carry a number of votes equal to the number of shares of common stock issuable as if converted at the record date.

每股优先转换股 A 如果在登记日期转换，都拥有与发行的普通股持有者同等数量的投票权。

Each share of Series A Convertible Preferred Stock will carry a number of votes equal to the number of shares of common stock issuable as if converted at the record date.

每股可转换优先股 A 将与普通股的投票数相等，好像在登记日期转移。

Pooled investment team has more than 10 years in investment banking business professionals and more than 10 years in the financial media reported a senior reporter, also has a group of financial professionals and a master's students, create a unique line with market demand for cross - Innovative business model. A by virtue of more than 10 years of Grounding in the capital market, established a number of domestic enterprises of the vast network of the elite, of which more than 200 listed companies resources A consultant is a solid business foundation for more than 500 strong network of media resources are operating effectively protect ; Dozens of brokerages, fund companies and investment institutions Touhangyewu is the strong backing.

投资团队汇集了从事十余年投资银行业务的专业人士以及从事十多年财经媒体报导的资深记者，同时还拥有一批金融专业的硕士及本科生，形成了一种独特的符合市场需求的交叉式创新业务模式。A凭借十余年在资本市场的磨砺，建立了一批国内精英企业的庞大网络，其中200余家上市公司资源是A顾问业务的坚实基础；500多家强大的媒体资源网络是开展业务的有力保障；数十家券商、基金公司及投资机构是投行业务的坚强后盾。

Upstream has formed an annual output of 300,000 tons has a high-quality silicon mines, when the glass holding company Silicon Mine Ichang limited liability company is a large production base of raw materials of silica, there are two domestic beneficiation of silica sand advanced production lines, annual output of fine quartz sand 300000 t / a, is South Africa's largest silica sand base; mid-stream has a 450t / d, 500t / d float glass production lines and 600 / t self-cleaning glass substrate production line of the article, an annual output of float glass production capacity of 10 million weight boxes; downstream has a glass cover, TiO2 thin-film self-cleaning glass, tempered glass, insulating glass, such as a number of glass deep-processing production lines, processing 3 million square meters of glass products.

上游已形成拥有年产30万吨的优质硅矿，控股公司宜昌当玻硅矿有限责任公司是大型硅质原料生产基地，建有2条国内先进的硅砂选矿生产线，年产石英精砂30万t/a，属中南地区最大的硅砂基地；中游拥有450t/d、500t/d浮法玻璃生产线和600/t自洁玻璃基片生产线各一条，年产浮法玻璃1000万重量箱生产能力；下游拥有强化玻璃盖、TiO2薄膜自洁玻璃、钢化玻璃、中空玻璃等多条玻璃深加工生产线，年加工玻璃制品300万平方米。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。