摘要:
An intravascular delivery catheter includes a middle member or manipulator to ameliorate the effect of buckling of the graft cover during the tracking or positioning of the delivery device within a body flow lumen to deploy an exclusion device, such a stent graft. The delivery device/catheter includes a region or regions of lower resistance to bending than other portions of the delivery device, which are positioned, within the delivery device, to preferentially bend the delivery system at locations where buckling will have minimal effect upon the deployment of the exclusion device from the delivery system. The preferential bending is accomplished, by providing a middle member/manipulator that is a rod with laterally oriented slots, having different depth and spacing configurations, or by using a wire coil as a portion of the middle member where the variable stiffness is created either by providing a variable/multiple coil diameter or by using a wire having a variable diameter along its length while the wire coil diameter is relatively uniform.
摘要:
An intravascular delivery catheter includes a middle member or manipulator to ameliorate the effect of buckling of the graft cover during the tracking or positioning of the delivery device within a body flow lumen to deploy an exclusion device, such a stent graft. The delivery device/catheter includes a region or regions of lower resistance to bending than other portions of the delivery device, which are positioned, within the delivery device, to preferentially bend the delivery system at locations where buckling will have minimal effect upon the deployment of the exclusion device from the delivery system. The preferential bending is accomplished, by providing a middle member/manipulator that is a rod with laterally oriented slots, having different depth and spacing configurations, or by using a wire coil as a portion of the middle member where the variable stiffness is created either by providing a variable/multiple coil diameter or by using a wire having a variable diameter along its length while the wire coil diameter is relatively uniform.
摘要:
A method for purifying contaminated liquids, especially waste water with high TKN/BOD concentrations, by first introducing, into the contaminated liquid, an acidic coagulant such as a metal salt and then introducing a second alkaline coagulant, into the contaminated liquid which dramatically increases the speed and effectiveness of subsequent coagulation and flocculation and thereby removal of TKN/BOD. By comparing the total (molar amount of acidic coagulant cation+alkaline coagulant cation) with an equal molar amount of the acidic cation, superior removal of TKN/BOD are achieved due to a synergy between the acidic and alkaline coagulant versus using just an acidic metal coagulant.
摘要:
A self-locking suture anchor comprises a shank with an unthreaded portion between a first, proximal thread flight and a second flight axially displaced therefrom. A suture retainer collar through which a suture can be pulled surrounds the unthreaded portion. When the self-locking suture anchor is threaded into bone, the suture is compressed between the suture retainer collar and the screw and between the bone and the screw. A drive socket is in a central cavity of the shank. A driver includes a driver head. Additional sutures may also be supported to a holding suture retainer in the central cavity. A method includes securing a suture to position sutured tissue with respect to the self-locking suture anchor or to establish a particular tension in the suture.
摘要:
A multilevel optical receiver can comprise a plurality of comparators that generally correspond with the number of levels in a multilevel data stream. Each comparator can be individually controlled and fed a decision threshold in order to decode a multilevel signal. The multilevel optical receiver can generate a statistical characterization of the received symbols in the form of a marginal cumulative distribution function (CDF) or probability density function (pdf). This characterization can be used to produce a set of ε-support estimates from which conditional pdfs are derived for each of the transmission symbols. These conditional pdfs may then be used to determine decision thresholds for decoding the received signal. The conditional pdfs may further be used to continuously estimate the fidelity or error rate of the received signal without the transmission of a testing sequence. The ε-supports may further be used to automatically control the gain on the receiver.
摘要:
A circuit can process a sample of a signal to emulate, simulate, or model an effect on the signal. Thus, an emulation circuit can produce a representation of a real-world signal transformation by processing the signal according to one or more signal processing parameters that are characteristic of the real-world signal transformation. The emulation circuit can apply analog signal processing and/or mixed signal processing to the signal. The signal processing can comprise feeding the signal through two signal paths, each having a different delay, and creating a weighted sum of the outputs of the two signal paths. The signal processing can also (or alternatively) comprise routing the signal through a network of delay elements, wherein a bank of switching or routing elements determines the route and thus the resulting delay.
摘要:
Signals propagating on an aggressor communication channel can cause detrimental interference in a victim communication channel. A signal processing circuit can generate an interference cancellation signal that, when applied to the victim communication channel, cancels the detrimental interference. The signal processing circuit can dynamically adjust or update two or more aspects of the interference cancellation signal, such as an amplitude or gain parameter and a phase or delay parameter. Via the dynamic adjustments, the signal processing circuit can adapt to changing conditions, thereby maintaining an acceptable level of interference cancellation in a fluctuating operating environment. A control circuit that implements the parametric adjustments can have at least two modes of operation, one for adjusting the amplitude parameter and one for adjusting the phase parameter. The modes can be selectable or can be intermittently available, for example.
摘要:
Compositions comprising one or more nutritional substances are described, where the composition is suitable for oral consumption by a subject, and wherein the one or more compounds collectively provide the features of 1) interfering with the progression of mucositis at multiple points in the inflammatory cycle, while 2) promoting the structure, function, and integrity of the oral mucosa, and/or 3) inhibiting pathogenic bacterial, viral, or fungal overgrowth and/or 4) providing soothing relief to the patient. The compositions are useful for treating mucositis or xerostomia.
摘要:
A Signal Conditioning Filter (SCF) and a Signal Integrity Unit (SIU) address the coupled problem of equalization and noise filtering in order to improve signal fidelity for decoding. Specifically, a received signal can be filtered in a manner to optimize the signal fidelity even in the presence of both significant (large magnitudes of) ISI and noise. The present invention can provide an adaptive method that continuously monitors a signal fidelity measure. Monitoring the fidelity of a multilevel signal can be performed by external means such as by the SIU. A received signal y(t) can be “conditioned” by application of a filter with an electronically adjustable impulse response g(t). A resulting output z(t) can then be interrogated to characterize the quality of the conditioned signal. This fidelity measure q(t) can be used to adjust the filter response to maximize the fidelity measure of the conditioned signal.
摘要:
An electrically driven stepmotor valve assembly including separable annular stator and rotor-valve assemblies. The rotor-like assembly having a cylindrical housing adapted to slip fit inside a central, domed, stator cavity, with alignable locking members on these assemblies permitting rotary interlocking upon the slip fit assembly thereof. A sealing arrangement, in the vicinity of the open end of the stator assembly, peripherally seals the stator and rotor-valve assemblies relative to each other, when assembled, with the rotor housing having a locating plate ring portion which, in turn, supports an elastic sealing member that fits into a groove in a bottom wall of the stator housing. A plurality of differing sealing arrangement designs and structures, including sealing member reinforcing structures, are set forth for the sealing of the interlocked stator and rotor-valve assemblies relative to each other.