摘要:
A field device for use in monitoring or controlling an industrial process includes two wire process control loop electrical connections. Digital communications monitoring circuitry coupled to the electrical connections and is configured to control power to the field device electrical circuitry in response to a digital signal on the two wire process control loop.
摘要:
A novel process effective for the removal of organic sulfur compounds, organic nitrogen compounds and light olefins from liquid hydrocarbons is disclosed. The process more specifically addresses the removal of these contaminants from aromatic compounds including benzene and toluene and from naphtha. The liquid hydrocarbons are contacted with a blend of at least one metal oxide and an acidic zeolite. Preferably, the metal oxide comprises nickel oxide and molybdenum oxide and the acidic zeolite is acidic stabilized zeolite Y. This blend has a significant capacity for adsorption of impurities and can be regenerated by oxidative treatment.
摘要:
The invention as claimed is directed to a process for making an epothilone having the following structures from ones having an oxiranyl moiety, by reacting a compound having the latter structure with a metal or metal-assisted reagent. Said metal or metal-assisted reagent is selected from the group consisting of a) reactive metallocenes; b) [N2C(CO2Me)2, cat Rh2,(OAC)4]; c) [N2C(CO2Me)2, cat[(n-C7H15CO2)2 Rh]2]; d) [Zn—Cu, EtOH]; e) [Mg(Hg), MgBr]; f) Cr; g) [FeCl3, n-BuLi]; h) [TiCl3, LiAlH4]; i) [TiCl4, Zn]; j) [WCl6, LiAlH4,]; k) [NbCl5, NaAlH4]; l) [VCl3,Zn] and m) [WCl6, n-BuLi].
摘要:
A system including modular radial head implants, sizers for trial reduction of the joint, and instrumentation for preparing the radial head, implanting the sizers, assembling the implants.
摘要:
In a system for locating the position of a transmitter, a platform containing an antenna is moved through a measurement path. The frequency received by the antenna is measured at measurement points distributed along a measurement path. The frequency is measured by cross correlating coherent pulses of the received frequency signal. An inertial navigation system on the platform indicates the position of the measurement path. A computer determines estimated locations by non-linear least squares convergence starting from trial locations. The non-linear least squares convergence is based on the frequency equation for the received frequency ##EQU1## in which f.sub.0, is the transmitter frequency, V is the antenna velocity and r is the range of the transmitter. The computer evaluates a cost function derived from the frequency equation, for each location estimated by the non-linear least squares convergence and selects the estimated location with the lowest cost function as the best solution.
摘要翻译:在用于定位发射机的位置的系统中,包含天线的平台被移动通过测量路径。 在沿着测量路径分布的测量点处测量由天线接收的频率。 频率通过接收频率信号的相干相干脉冲来测量。 平台上的惯性导航系统指示测量路径的位置。 计算机通过从试验地点开始的非线性最小二乘法收敛来确定估计位置。 非线性最小二乘收敛基于接收频率的频率方程,其中f0是发射机频率,+ E,ovs V + EE是天线速度,+ E,ovs r + EE是 发射机。 计算机评估从频率方程导出的成本函数,对于由非线性最小二乘收敛估计的每个位置,并选择具有最低成本函数的估计位置作为最佳解。
摘要:
A method of forming a planarized layer on a CCD device to permit a lens array to be formed which includes etching a B.sub.2 O.sub.3 layer provided on a conformally coated SiO.sub.2 layer until a sufficient amount of the deposited B.sub.2 O.sub.3 layer is removed to provide a planarized surface.
摘要翻译:在CCD器件上形成平坦化层以允许形成透镜阵列的方法,其包括蚀刻在保形涂覆的SiO 2层上提供的B 2 O 3层,直到去除了足够量的沉积的B 2 O 3层以提供平坦化表面。
摘要:
Copper surfaces upon which organic resins are electrophoretically deposited to serve as plating or etch resists in the course of manufacturing printed circuits, are preliminarily provided with a uniformizing/passivating coating layer, such as a layer of copper oxide or phosphate conversion coating, over which the organic resin is electrophoretically deposited, resulting in the organic resin being deposited with substantial uniformity in thickness and properties.
摘要:
In the process flow scheme for chromatographically separating para-xylene from C.sub.8 isomers containing substantial amounts of C.sub.9 aromatic hydrocarbon impurities with BaX or KY zeolite adsorbent and heavy desorbents, e.g., tetralin and diethyltoluene, a bottoms stream from the extract fractionation column containing desorbent is recycled to the separation unit and a sidecut stream, containing C.sub.9 aromatic hydrocarbon impurities and a minor amount of the desorbent from the raffinate stream, is directed to the raffinate fractionation column, thereby removing C.sub.9 aromatic hydrocarbons from the desorbent before recycling the desorbent to the separation unit, and preventing C.sub.9 aromatics from building up in the desorbent input. A fractionator for the extract column bottoms stream is eliminated, lowering capital costs, and energy requirements for the raffinate column are reduced.
摘要:
A dual function cart convertible between a wheelbarrow-type load transporter and a vehicle towed cart. The cart comprises a frame supporting a load carrying tube, the frame including a transversing extending axle having relatively large diameter spoked wheels journaled for rotation on opposed ends of the axle. Pivotally secured to the frame is a handle assembly in the form of a rectangular loop which, when latched by a removable rod in a first position orients the handle in an upright plane where the vehicle can be operated as a wheelbarrow. Alternatively, the removable rod may be used to latch the handle in a generally horizontal plane at an elevation facilitating connection thereof by a clevis to a hitch on a towing vehicle. The cart also includes an auxiliary side member which may be secured to the tub for increasing the effective load-carrying volume of the tub.
摘要:
This invention relates to a process for isomerization of sulfur containing isomerizable hydrocarbons, especially saturated hydrocarbons having from 4 to 7 carbon atoms per molecule. More specifically, this invention relates to a process for isomerizing a sulfur containing combined feed where the sulfur compounds are controlled to achieve a level of from about 5 wt. ppm to about 150 wt. ppm utilizing a catalyst composition containing a hydrogen form crystalline aluminosilicate, a Group VIII metal, a refractory oxide and having a surface area of at least 580 m.sup.2 /g.